11th week of 2009 patent applcation highlights part 32 |
Patent application number | Title | Published |
20090067487 | INCREASING PWM RESOLUTION BY MODULATION - A method for generating a pulse width modulated (PWM) signal includes determining a PWM period and/or a pulse width of the pulse width modulated signal by counting the number of clock cycles of a reference clock signal and by switching the pulse width modulated signal when a predetermined number of clock cycles is reached. The reference clock signal comprises clock cycles of at least a first clock period and a second clock period. The first clock period and the second clock period differ by an amount of time, which is substantially smaller than both half of the first clock period and half of the second clock period. | 2009-03-12 |
20090067488 | HDMI-QUALITY CONTENT TRANSMISSION ALONG A SINGLE MEDIUM - In a presentation system, a source device provides uncompressed presentation content in an HDMI format. A first conversion device converts the uncompressed presentation content to an uncompressed second format and entirely transmits the uncompressed presentation content in the second format along an electrically conductive member. A second conversion device receives the uncompressed presentation content in the second format from the conductive member and converts the uncompressed presentation content to the HDMI format. For example, the conductive member may be that of a coaxial cable. | 2009-03-12 |
20090067489 | Method and System for Monitoring a Content Signal - A system and method for monitoring a signal includes a monitoring display and an automation system receiving the content signal and either captures an I-frame of the content signal or encodes the content signal into an MPEG signal. The automation system communicates the I-frame or MPEG encoded signal to a display. | 2009-03-12 |
20090067490 | METHOD AND SYSTEM FOR MONITORING AND SWITCHING BETWEEN A PRIMARY ENCODER AND A BACK-UP ENCODER IN A COMMUNICATION SYSTEM - A system and method for switching to a back-up encoder includes a first encoder processing a first channel signal to form a first encoded signal, a second encoder an uplink signal processing system generating a first uplink signal from the first encoded signal. A monitoring system previews the first channel signal encoded through the second encoder while the uplink signal processing system generates the first broadcast signal using the first channel signal encoded through the first encoder. The monitoring system redirects the first channel signal through the second encoder to form a second encoded signal. The uplink signal processing system generates a second broadcast signal with the first channel signal through the second encoder. | 2009-03-12 |
20090067491 | Learning-Based Image Compression - Learning-based image compression is described. In one implementation, an encoder possessing a first set of learned visual knowledge primitives excludes visual information from an image prior to compression. A decoder possessing an independently learned set of visual knowledge primitives synthesizes the excluded visual information into the image after decompression. The encoder and decoder are decoupled with respect to the information excluded at the encoder and the information synthesized at the decoder. This results in superior data compression since the information excluded at the encoder is dropped completely and not transferred to the decoder. Primitive visual elements synthesized at the decoder may be different than primitive visual elements dropped at the encoder, but the resulting reconstituted image is perceptually equivalent to the original image. | 2009-03-12 |
20090067492 | Method and Device for Minimizing a Quantization Errror - A device minimizes a quantization error in the inverse quantization of a quantized coefficient during a compression method, said quantization error describing a difference between the quantized coefficient after inverse quantization and an associated coefficient prior to quantization. According to said method, at least one parameter that is characteristic of the compression of the quantized coefficient is selected, (at least two characteristic parameters being selected if one of the two characteristic parameters corresponds to a temporal prediction mode), a correction value is chosen based on the selected characteristic parameter(s) and inverse quantization takes place after the correction value has been added to the quantized coefficient. | 2009-03-12 |
20090067493 | METHOD AND APPARATUS FOR CONTROLLING BITRATE OF SCALABLE VIDEO STREAM - Provided is a method and apparatus for controlling a bit-rates in which an amount of generated bits is adjusted according to the complexity of each frame, and a bit-rate within a frame can be further effectively adjusted by applying different quantization parameter (QP) values to respective macro blocks. In the apparatus for controlling a bit-rate, a motion compensated temporal filtering (MCTP) operation is performed for each group of pictures (GOP) in an input scalable layer, and thereafter bits are allocated to respective frames in consideration of frame type and frame complexity. Furthermore, a QP is adaptively determined in the unit of a macro block on the basis of the allocated bits. | 2009-03-12 |
20090067494 | Enhancing the coding of video by post multi-modal coding - Post multi-modal coding overcomes the shortcomings of video encoders which fail to meet an expected quality standard while encoding some portions of a video. The deficient encoding is typically due to the type of video content or the encoding technique. A method to improve the quality of the deficient portions, identifies macroblocks that are encoded at a deficient quality. Then, the identified macroblocks are encoded with another suitable encoding technique so that the desired quality is met. The improved macroblocks are then inserted into the original bit-stream, replacing the lower quality sections. | 2009-03-12 |
20090067495 | RATE DISTORTION OPTIMIZATION FOR INTER MODE GENERATION FOR ERROR RESILIENT VIDEO CODING - Optimal selection of an inter mode is provided for video data being encoded to achieve enhanced error resilience when the video data is decoded. End to end distortion cost from encoder to decoder for inter mode selection is determined based on residue energy and quantization error. Using the distortion cost function based on residue energy and quantization error, and an optimal Lagrangian parameter, the optimal inter mode is selected for use during encoding for maximum error resilience. The optimal Lagrangian parameter can be set to be proportional to an error-free Lagrangian parameter with a scale factor determined by packet loss rate. | 2009-03-12 |
20090067496 | Method and Apparatus for Coding Interlaced Video Data - Often hierarchical bi-directionally predicted frame structures are used for encoding a video picture sequence. The frames may consist of interlacing fields. A method for encoding interlaced video, wherein inter-prediction of fields is used and reference lists are assigned to the fields for indicating reference frames or fields, comprises that, if within such reference list a reference to another frame is included, then references to both fields of the other frame are included separately in direct sequence. Further, a temporal level is assigned to each of the frames according to their display order, and for the frames of all except one temporal level the quantization parameter is higher for one type of fields than for the other type of fields. | 2009-03-12 |
20090067497 | Method of deriving a motion vector of a bi-predictive block based on a motion vector of a co-located block in a reference picture - In one embodiment, the method includes selecting a list | 2009-03-12 |
20090067498 | Method of deriving a motion vector of a bi-predictive block based on a motion vector of a co-located block in a reference picture - In one embodiment, the method includes selecting the list | 2009-03-12 |
20090067499 | Method of deriving a motion vector of a bi-predictive block based on a motion vector of a co-located block in a reference picture - In one embodiment, the method includes selecting a list 0 motion vector of the co-located block in a first reference picture if the co-located block has the list 0 motion vector and a list 1 motion vector. The first reference picture is a type of reference picture permitted to be located temporally before or after the current picture. The method further includes scaling the selected list 0 motion vector based on temporal distance between the current picture and the first reference picture, and deriving at least one motion vector of the bi-predictive block by applying a bit operation to the scaled motion vector. | 2009-03-12 |
20090067500 | Method of deriving a motion vector of a bi-predictive block based on a motion vector of a co-located block in a reference picture - In one embodiment the method includes selecting a list 0 motion vector of the co-located block in a first reference picture as the motion vector if the co-located block has the list 0 motion vector and a list 1 motion vector. The first reference picture is a type of reference picture permitted to be located temporally before or after the current picture. The method further includes selecting the list 1 motion vector of the co-located block in the first reference picture if the co-located block only has the list 1 motion vector, scaling the selected motion vector based on temporal distance between the current picture and the first reference picture, and deriving at least one motion vector of the bi-predicuve block by applying a bit operation to the scaled motion vector. | 2009-03-12 |
20090067501 | DYNAMIC IMAGE ENCODING DEVICE, DYNAMIC IMAGE DECODING DEVICE, DYNAMIC IMAGE ENCODING METHOD, DYNAMIC IMAGE DECODING METHOD, DYNAMIC IMAGE ENCODING PROGRAM, AND DYNAMIC IMAGE DECODING PROGRAM - A moving image encoding device measures a band of a target image to be encoded and a band of a reference image by a band analyzer, and generates band-related information representing these bands. A prediction signal generator generates a prediction signal such that the signal matches the band of the target image, from the reference image, based on the band-related information. A difference unit obtains a difference between the target image and the prediction signal to generate a differential signal. A converter and a quantizer each encode the differential signal to generate an encoded differential signal. An inverse quantizer and an inverter each decode the encoded differential signal to generate a decoded differential signal. An adder adds the prediction signal to the decoded differential signal to generate a reproduced image. An output terminal outputs at least the encoded differential signal and the band-related information. | 2009-03-12 |
20090067502 | Method for Scalably Encoding and Decoding Video Signal - The present invention relates to a method for scalably encoding and decoding a video signal. In an embodiment of the present invention, motion information, such as reference indices, motion vector, modes, etc., for an enhanced layer can be derived from a base layer, and a reference index for an image block in the enhanced layer is determined using median criterion based upon the base layer. A reference index for a block, having the most pixels corresponding to those of the image block, in the base layer is selected as the reference index for the image block, and the nearer reference index is selected if more than one block in the base layer have the same pixels corresponding to those of the image block. And, a motion vector for the base layer block related to the selected reference index is selected as the motion vector for the image block. | 2009-03-12 |
20090067503 | METHOD AND APPARATUS FOR VIDEO DATA ENCODING AND DECODING - Video data encoding and decoding methods and apparatuses are provided. In the video data encoding and decoding methods, codes books are provided to an encoder and a decoder. In the encoder, an index corresponding to a vector that is most similar to a current vector of an input moving picture among the vectors of the code book is encoded. In the decoder, the index is decoded. Accordingly, it is possible to increase compression ratio and reduce calculation complexity. | 2009-03-12 |
20090067504 | REAL-TIME VIDEO CODING/DECODING - A video codec having a modular structure for encoding/decoding a digitized sequence of video frames in a multi-core system is described. The video codec comprises a memory unit; a multithreading engine. and a plurality of control and task modules organized in a tree structure, each module corresponding to a coding operation. The modules communicate with each other by control messages and shared memory. The control modules control all coding logic and workflow, and lower level task modules perform tasks and provide calculations upon receiving messages from the control task modules. The multithreading engine maintains context of each task and assigns at least one core to each task for execution. The method of coding/decoding comprises denoising, core motion estimation, distributed motion estimation, weighted texture prediction and error resilient decoding. | 2009-03-12 |
20090067505 | Method and Apparatus for Motion Estimation Using Combined Reference Bi-Prediction - A method and apparatus are provided for motion estimation using combined reference bi-prediction. The apparatus includes an encoder ( | 2009-03-12 |
20090067506 | Method and System for Weighted Encoding - A method and system for weighted encoding of image data includes a transformation device configured to determine a non-linear transformation function for use in weighting an encoding of image data such that selected areas of the image data where increased detail is desired are encoded using a disproportionately greater number of bits of a total number of bits available for characterizing the image data. The system of the present invention can further include an encoding device configure to encode the weighted image data. In one embodiment of the present invention, the transformation device includes an analysis device configured to arrange pixel information into groups according to bit depths of the pixels of the image data, a post processing device configured to receive the organized pixel information and determine respective gains for the groups, and a transformation generation device configured to determine the transformation function based upon the respective gains. | 2009-03-12 |
20090067507 | Video compositing of an arbitrary number of source streams using flexible macroblock ordering - In one embodiment, a system includes a compositor operable to receive a plurality of source video streams, each containing source images, and to convert each of the source video streams into source slice groups using flexible macroblock ordering (FMO). The compositor is further operable to add pad slice groups to the source slice groups to create a composite image, and reorder the source slice groups and pad slice groups into a single composite output stream. A device receives the single composite output stream and displays the composite image as a rectangular picture that has a size larger than that of any of the source images. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. | 2009-03-12 |
20090067508 | SYSTEM AND METHOD FOR BLOCK-BASED PER-PIXEL CORRECTION FOR FILM-BASED SOURCES - A system and method for block-based per-pixel correction for film-based sources. The appearance of mixed film/video can be improved through an adaptive selection of normal deinterlaced video relative to inverse telecine video. This adaptive selection process is based on pixel difference measures of sub-blocks within defined blocks of pixels. | 2009-03-12 |
20090067509 | System And Method For Displaying A Digital Video Sequence Modified To Compensate For Perceived Blur - A system for displaying a digital video sequence includes a graphics processing unit (GPU) and a display device. The GPU receives and modifies the digital video sequence to compensate for perceived blur based on motion between frames of the digital video sequence. The display device displays the modified digital video sequence. A method and computer readable medium having computer readable code is also provided. | 2009-03-12 |
20090067510 | Method and Apparatus for Inserting Digital Media Advertisements into Statistical Multiplexed Streams - A method and system for the insertion of local signals, including digital media advertisements, into statistically multiplexed streams is presented. The rate control and timing information is computed and is used to specify the insertion time and rate parameters for digital advertisements. In one embodiment, a maximum bit rate over the advertisement duration is specified. The maximum bit rate may be constant or may vary in time, such that high bit rate portions of the advertisement are supported. High bit rate portions of the advertisements in different program streams may be staggered, such that the total bandwidth required does not exceed a maximum, but allowing for high bit rate portions of advertisements. Custom bit rate profiles for advertisements may also be defined, with the profiles being defined at a high granularity or a low granularity. | 2009-03-12 |
20090067511 | METHOD OF GENERATING A BLOCKINESS INDICATOR FOR A VIDEO SIGNAL - The described embodiments relate to methods and systems for detecting the blockiness of a video signal comprised of a number of pixels. The method includes the steps of calculating a total number of pixels in the video signal in flat blocks and visible block edge transitions, and generating a blockiness indicator from the total number of pixels in flat blocks and visible block edge transitions. The step of calculating the total number of pixels in flat blocks and the total number of pixels in visible block edge transitions may include calculating differential values for each pixel in the video signal, analyzing the differential values to determine if the pixel is part of a transition and/or a flat area and then counting the number of pixels in flat blocks and visible block edge transitions to produce a total number of pixels in flat blocks and a total number of pixels in visible block edge transitions. | 2009-03-12 |
20090067512 | MULTI-TIERED QUANTIZATION OF CHANNEL STATE INFORMATION IN MULTIPLE ANTENNA SYSTEMS - A multi-tiered CSI vector quantizer (VQ) is provided for time-correlated channels. The VQ operates by quantizing channel state information by reference to both the current channel state information and a prior channel state quantization. A system is also provided that uses multi-tiered CSI quantizers. Enhanced signaling between the transmitter and receivers is provided in order to facilitate the use of multi-tiered CSI quantizers. | 2009-03-12 |
20090067513 | Smart antenna system and method thereof for forming uplink eigenbeam of ofdm/tdd - A mobile station transmitting and receiving method and a corresponding mobile station transmitter and receiver of a smart antenna system for forming uplink eigenbeams of the OFDM/TDD (orthogonal frequency division multiplex/time division duplex), wherein OFDM symbols are received from a base station through a downlink via multiple antennas ( | 2009-03-12 |
20090067514 | METHOD OF NON-UNIFORM DOPPLER COMPENSATION FOR WIDEBAND ORTHOGONAL FREQUENCY DIVISION MULTIPLEXED SIGNALS - Described is a method for compensation of an OFDM signal propagating through Doppler-distorted, time-varying multipath channels. The method is based on low-complexity post-FFT signal processing. Minimum mean square error combining of signals is performed for signals received at spatially-distributed receiver elements using adaptive channel estimation and phase tracking. Doppler shifts are modeled as a consequence of motion-induced time compression and dilation. The Doppler rate is assumed constant over one OFDM block but can vary between OFDM blocks. Thus a non-constant Doppler shift is accommodated by the method. Non-uniform Doppler compensation across subchannels is based on adaptive estimation and prediction of the Doppler rate. A single adaptively estimated parameter is used to track the phases of all the carriers and channel estimates are updated on a block by block basis. | 2009-03-12 |
20090067515 | SYSTEM AND METHOD FOR DETERMINING TRANSMISSION PARAMETERS IN AN ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXED DATA STREAM - A system for identifying transmission parameters of an OFDM signal transmitted according to a transmitter clock includes a first correlator to receive and correlate samples of the signal sampled according to a receiver clock and provide a first metric indicative of whether the signal has a first transmission mode, a plurality of additional correlators, operable in parallel with the first correlator, to receive and correlate the samples of the signal sampled according to the receiver clock and provide a plurality of additional metrics indicative of whether the signal has a second transmission mode and whether the receiver clock is aligned with or displaced by at least one sample over one OFDM symbol relative to the transmitter clock, and a processor. The processor receives the metrics, and determines whether the signal has the first or second transmission mode and whether the receiver clock is aligned or displaced by the at least one sample relative to the transmitter clock. | 2009-03-12 |
20090067516 | RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM - A bidirectional communication system is provided. In one embodiment, a method for an orthogonal frequency division multiplexing multipoint-to-point communications system comprises establishing communication between a first remote unit of a plurality of remote units and a host unit, the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration using orthogonal frequency division multiplexing; and adjusting a round trip path delay associated with the first remote unit. | 2009-03-12 |
20090067517 | Preamble sequence detection and integral carrier frequency offset estimation method for OFDM/OFDMA wireless communication system - In multi-cell OFDM/OFDMA wireless communication systems, any subscriber station (SS) or mobile station (MS) that intends to enter the system needs to establish time and frequency synchronization with the base station (BS) and obtain the identification code of the BS, where in frequency synchronization one usually needs to estimate the fractional carrier frequency offset (CFO) and the integral CFO. (“Fractional” and “integral” refer to, respectively, the fractional and the integral parts of the ratio of the CFO to subcarrier spacing.) The present invention assumes that the SS or MS first does timing and fractional CFO synchronization and then conducts integral CFO estimation and BS identity detection. The present invention considers integral CFO estimation and BS identity detection jointly, i.e., it proposes solutions that address these topics jointly. The present invention formulates the problem as a signal detection problem in multi-channel interference and obtains the theoretically optimal solution first, and then derives simplified, approximately optimal solutions, in which the present invention employs frequency-domain filtering to calculate the required correlation values which can drastically reduce the high computational complexity of the original theoretically optimal solution but results in little impact on precision. In addition, the present invention proposes several further simplified algorithms, some of which can even eliminate the use of multipliers. The above proposition of frequency-domain filtering has high extensibility in application to related signal sequence detection problems. | 2009-03-12 |
20090067518 | Interpolation Method and a Related Device for Channel Estimation in Communication Systems - A method for interpolating between a first and a second point includes the steps of calculating a first distance between a first and a second independent value and a second distance between a first and a second dependent value, right shifting the first and the second distances by a predetermined number of bits for obtaining respectively a hold step and a variations step and generating a number of interpolated points, having independent values between the first and the second independent values and corresponding dependent values obtained by alternating hold and variations phases, wherein the hold phase consists of generating a number of points corresponding to the hold step having the same dependent value, and wherein the variations phase consists of varying the dependent value by the variations step until the number of interpolated points has been calculated. The method is particularly suitable for channel estimation in communication systems. | 2009-03-12 |
20090067519 | ESTIMATION OF LENGTH OF CHANNEL IMPULSE RESPONSE - In a receiver for processing OFDM encoded signals, wherein the OFDM encoded digital signals are transmitted by means of a symbol in each of subcarrier frequency channels, with at least some of said subcarriers containing user data symbols, an initial estimate of a channel frequency response is formed from magnitudes of user data symbols received in those subcarriers. Then, a correlation function of a channel impulse response is estimated by performing an inverse Fourier transform on the initial estimate of the channel frequency response, and the length of the channel impulse response is estimated by examining peaks in the estimated correlation function of the channel impulse response. | 2009-03-12 |
20090067520 | METHOD AND APPARATUS FOR CHANNEL ESTIMATION IN COMMUNICATION SYSTEMS, AND RELATED COMPUTER PROGRAM PRODUCT - A method of channel estimation in orthogonal frequency-division multiplexing communication employing three or more subcarriers, wherein frequency correlation exists between the subcarriers. The method includes:
| 2009-03-12 |
20090067521 | BLIND ESTIMATION METHOD OF OFDM MODULATION PARATMETERS - The present invention concerns a blind estimation method of at least one temporal modulation parameter of an OFDM signal, in which a plurality of demodulation attempts of said OFDM signal are carried out using a plurality of respective values of this temporal parameter and, for each demodulation attempt, a cost function representative of the entropy of the demodulated signal is calculated, the estimate of said temporal parameter then being obtained as the value of this parameter minimising said cost function. | 2009-03-12 |
20090067522 | WIRELESS COMMUNICATION SYSTEM USING PILOT SUBCARRIER ALLOCATION - A wireless communication system using pilot subcarrier allocation and a method of allocating the pilot subcarriers for use in downlink and uplink communication in a multiple-input multiple-output (MIMO) antenna system using orthogonal frequency division multiplexing (OFDM) modulation are disclosed. The method includes providing a frame structure comprising OFDM symbols in time domain and subcarriers in frequency domain and alternately allocating first pilot subcarriers for a first antenna and second pilot subcarriers for a second antenna in the time and frequency domains, wherein each of the alternating first pilot subcarriers and the second pilot subcarriers is separated by multiple of 9 subcarriers in the frequency domain and further allocated in two contiguous OFDM symbols. | 2009-03-12 |
20090067523 | FAST INITIALIZATION USING SEAMLESS RATE ADAPTATION - A method for initializing modems in a multicarrier transmission system to establish a communication link between the transmitter and the receiver. An exemplary embodiment includes the steps of providing a predetermined parameter value that approximates a corresponding actual parameter value of the communication link, establishing a data communication link between a first transceiver and a second transceiver using the predetermined parameter value to allow the transmission of data, determining the actual parameter value, and seamlessly increasing the data rate of the established data communication link by using the determined actual parameter value to provide an steady state communication link with an updated data rate. | 2009-03-12 |
20090067524 | GUARD INTERVAL LENGHT SELECTION IN AN OFDM SYSTEMS BASED ON COHERENCE BANDWIDTH OF THE CHANNEL - A system, apparatus and methods are described that identify a maximum cyclic delay and corresponding cyclic prefix for a multi-path communications channel. In one embodiment, the maximum cyclic delay ( | 2009-03-12 |
20090067525 | Apparatus and method for pilot transmission in a wireless communication system - An apparatus and method for pilot transmission in a wireless communication system are provided. The method includes generating a precode and a postcode for coordinated beamforming using channel information of one or more streams for transmitting signals to one or more receive ends, selecting one or more streams to be allocated pilots, updating the precode according to a reference point for representing an effective channel of non-selected streams orthogonal to an effective channel of the selected streams, and precoding signals transmitted through the streams. | 2009-03-12 |
20090067526 | METHOD AND DEVICE FOR TRANSFERRING DATA IN A MULTI-CARRIER SYSTEM HAVING PARALLEL CONCATENATED ENCODING AND MODULATION - The invention relates to a transmitter-receiver pair for improved data transmission in a multi-carrier system and to a corresponding method, according to which a chain coding is used. To this end, a transmitter has a first coding stage, a transmission-demultiplexer stage, a second coding stage, a modulator stage, a transmission multiplexer stage and a multi-carrier modulator, whereby said transmission-demultiplexer stage and the transmission multiplexer stage are controlled by a bit loading device. Similarly, the receiver has a multi-carrier demodulator, a receiver demultiplexer stage, a first decoding stage, a receiver multiplexer stage and a second decoding stage, whereby the receiver multiplexer stage and demultiplexer stage are in turn controlled by the bit loading device. | 2009-03-12 |
20090067527 | Data puncturing ensuring orthogonality within communication systems - Data puncturing ensuring orthogonality within communication systems. A means is presented herein by which puncturing is employed within communication systems to ensure orthogonality (or substantial orthogonality) of various transmissions between communication devices within communication systems. Any of a variety of types of signals can be employed herein including uncoded signals, turbo encoded signals, turbo trellis coded modulation (TTCM) encoded signals, LDPC (Low Density Parity Check) encoded signals, and a RS (Reed-Solomon) encoded signals, among just some types of signals. A first transmission can be made from a first communication device to a second communication device, and the second communication device can sometimes request a subsequent transmission (e.g., a re-transmission) from the first communication device to the second communication device. Oftentimes, different information is sent from the first communication device to the second communication device within the subsequent transmission. Herein, each of these transmissions can be ensured to be orthogonal. | 2009-03-12 |
20090067528 | LINK-ADAPTATION SYSTEM IN MIMO-OFDM SYSTEM, AND METHOD THEREFOR - A system for link adaptation in a MIMO-OFDM system. In this system, the V-BLAST processor ( | 2009-03-12 |
20090067529 | QUANTIZED CHANNEL STATE INFORMATION PREDICTION IN MULTIPLE ANTENNA SYSTEMS - A CSI vector quantizer (VQ) system is provided for time-correlated channels. The VQ system operates a receiver forwarding quantized channel state information in the form of indices and a transmitter predicting channel state change. The VQ system is aimed at feedback channels, in which bit errors, erasures and delays can occur. The VQ system uses transmitter-side channel prediction algorithms that work with the quantized CSI information and allow the system to recover from feedback channel transmission errors, erasures and delays. Moreover, the techniques can be used to lower the required feedback rate, while keeping the system's throughput at the required level. | 2009-03-12 |
20090067530 | Providing feedback in a MIMO system - There is provided a system and method of operating a multiple-input multiple-output (MIMO) receiver with N antennas in a wireless communication system. The method includes measuring N vectors, each vector defining channel transfer coefficients between M antennas of a transmitter and a corresponding antenna of the receiver. Additionally, a vector in a linear space generated by the N measured vectors is selected and quantized values of less than M components of the selected vector are fed back to the transmitter. | 2009-03-12 |
20090067531 | METHOD FOR REPORTING CHANNEL INFORMATION IN MULTIPLE ANTENNA SYSTEM - There is provided a method of reporting downlink channel information to a base station in a multiple antenna system. The method includes reporting a single rank for overall subband, the overall subband comprising a plurality of subbands and reporting a CQI for the single rank for at least one subband. Radio resources required for reporting channel information can be reduced and signaling overheads can be minimized. | 2009-03-12 |
20090067532 | METHODS AND SYSTEMS FOR DIVERSITY COMBINING OF SYNCHRONIZATION STATISTICS IN OFDM SYSTEMS - Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference. | 2009-03-12 |
20090067533 | MIMO BASED NETWORK CODING NETWORK - A wireless communication system includes an intermediate node, a first node and a second node. There is described a method for implementing MIMO based network coding, comprising the first node transmitting first data to the intermediate node, and the second node transmitting second data to the intermediate node. Both the first node and the second node may use spatial multiplexing or time division multiplexing or frequency division multiplexing on a common/different resource. The intermediate node receives the transmissions from the first node and second node, and performs network coding on the first data and second data using a predefined network coding scheme to produce network coded information. The intermediate node transmits the network coded information to the first node and second node using multi-user MIMO; and; each first or second node receives the MIMO transmissions from the intermediate node and applies network decoding procedures to recover the first data and second data. Network coding schemes include Decode and Forward (DF), Map and Forward (MF) and Amplify and Forward (AF). The first node and second node may be members of groups of nodes all within the same coverage area. A method for scheduling MIMO-based network coded transmissions is also described. Hybrid Automatic Repeat Request (HARQ) transmission may also be network encoded. | 2009-03-12 |
20090067534 | WIRELESS COMMUNICATION SYSTEM USING PILOT SUBCARRIER ALLOCATION - A wireless communication system using pilot subcarrier allocation and a method of allocating the pilot subcarriers for use in downlink and uplink communication in a multiple-input multiple-output (MIMO) antenna system using orthogonal frequency division multiplexing (OFDM) modulation are disclosed. The method includes providing a frame structure comprising OFDM symbols in time domain and subcarriers in frequency domain and alternately allocating first pilot subcarriers for a first antenna and second pilot subcarriers for a second antenna in the time and frequency domains, wherein each of the alternating first pilot subcarriers and the second pilot subcarriers is separated by a multiple of 9 subcarriers in the frequency domain and further allocated in two contiguous OFDM symbols. | 2009-03-12 |
20090067535 | TRANSFER DEVICE - A transfer device for receiving packets that were transmitted by a device in a home network onto a transmission path, and transfers the received packet to another device. The stream to be transferred is classified into three types: (i) a type where each of packets constituting the stream is not attached with a time stamp; (ii) a type where each packet is attached with a valid time stamp; and (iii) a type where each packet is attached with an invalid time stamp. The transfer device determines, from among the three types, the type of the stream to be transferred, based on a transfer source device, transfer destination device, and provider of the stream. The transfer device then selects a transmission method by which to transfer the stream, among the time stamp attachment transmission method and the PCR reference transmission method. | 2009-03-12 |
20090067536 | WIDE-BAND DIRECT CONVERSION TRANSMISSION APPARATUS - There is provided a wide-band direct conversion transmitting apparatus including: a local oscillation unit generating first, second, and third oscillation signal pairs each including a pair of signals having a phase difference of 90°; an image rejection mixer unit mixing baseband transmission signals including an I signal and a Q signal having a phase difference of 90° with the first oscillation signal pair; a harmonic rejection mixer unit mixing each of the first, second, and third oscillation signal pairs with the baseband transmission signals; and an output signal selecting unit selecting output signals from the image rejection mixer unit or from the harmonic rejection mixer unit. | 2009-03-12 |
20090067537 | Adjustable Dual-Band Link - A communication system utilizing an adjustable link has at least a first data transmission circuit including at least a first communication link circuit. The first communication link circuit has a baseband circuit and at least a passband circuit. The baseband circuit corresponds to a baseband sub-channel and the passband circuit corresponds to a passband sub-channel. The first communication link circuit also includes a circuit that distributes a first subset of a data stream having a first symbol rate to the baseband circuit and a second subset of the data stream having a second symbol rate to the passband circuit. The baseband sub-channel and the passband sub-channel are separated by an adjacent guardband of frequencies. The passband carrier frequency is adjusted to define the guardband and the guardband corresponds to a first notch in a channel response of a first communications channel. | 2009-03-12 |
20090067538 | RECEIVER BASED TRANSMISSION CHARACTERISTIC ESTIMATOR - A processor-implemented method of estimating the saturation level of a transmitter from a transmitted communication signal received from the transmitter comprises generating a received data signal from the transmitted communication signal received from the transmitter, generating a transmitted data signal from the received data signal that corresponds to the actual data signal generated at the transmitter, comparing the transmitted data signal to the received data signal, and estimating the saturation level of the transmitter based on the comparison of the transmitted data signal to the received data signal. | 2009-03-12 |
20090067539 | Wireless Personal Area Network Communication Systems, Apparatus and Methods with Fast Adaptive Beamforming - An embodiment of the present invention provides a method for communicating in a wireless personal area network, comprising using adaptive beamforming configured for a low-rate mode for reliable low-rate communications and a high-rate mode for high-rate communications and using a fast algorithm to perform antenna beamforming for the high rate mode, wherein the fast algorithm includes training performed on a block-by-block basis with decision feedback from a receiver (RX) to a transmitter (TX) about the usefulness of further training stages. | 2009-03-12 |
20090067540 | METHOD FOR CONSTRUCTING RACH PREAMBLE AND METHOD FOR TRANSMITTING RACH SIGNAL - A wireless communication system is disclosed. A method for constructing a RACH preamble according to a cell radius of a base station (BS) irrespective of a guard time (GT) and a method for allocating the RACH preamble are disclosed. A method for constructing a preamble of a random access channel (RACH) includes acquiring time-length information of a predetermined cyclic prefix (CP) for each cell radius of a base station (BS), acquiring sequence time-length information of a single sequence or a repeated sequence, and constructing the preamble using the predetermined CP time-length information and the sequence time-length information, irrespective of a time length of a guard time (GT). | 2009-03-12 |
20090067541 | Digital linear amplification with nonlinear components (LINC) transmitter - Embodiments of the invention may provide for a digital LINC (linear amplification with nonlinear components) transmitter. The digital LINC transmitter may include a signal component separator, at least one digital delay modulator, a frequency synthesizer, at least one power amplifier, a power combiner, an antenna, and a mismatch compensator. Additionally, systems and methods may be provided for compensating for phase and amplitude mismatches between two signal paths. | 2009-03-12 |
20090067542 | Method and Device for Communicating Incremental Broadcast Information - This invention relates to a system, terminals, and a method of communicating broadcast information where broadcast information comprising at least two parts is transmitted to at least one communications terminal. The transmission comprises transmitting the broadcast information during at least a first time instance, and where the transmission further comprises transmitting incremental broadcast information during a time instance being different than the first time instance. In this way, by sending the broadcast information in increments, i.e. incrementally, it is ensured that terminals capable of it (due to better capabilities like higher information rate, greater bandwidth, etc. and/or due to better location like near the base station, having favorable propagation conditions, having line-of-sight to the base station, etc.) will receive the broadcast information more quickly and thereby faster can resume a “sleep” state (unless they are required to act in an active way upon the received broadcast information) without being limited by less complex or capable terminal or terminals under worst case conditions, as would otherwise be the case if the sending of broadcast information was designed to accommodate the worst or worse case situations. This saves power for the more capable and/or favorable placed terminals since the transceiver will be active for a shorter amount of time to receive the same amount of broadcast information. | 2009-03-12 |
20090067543 | Method and Apparatus for Multi-Rate Control in a Multi-Channel Communication System - An apparatus for data processing in a multi-channel communication system is provided. The apparatus includes an encoder configured to encode a number of bits for transmission via channels in the multi-channel communication system into coded bits and split the coded bits into a number of first sets of bits at a first ratio, a number of first rate units coupled to the encoder, each of the first rate units being configured to adjust one set of the first sets of bits in size at at least one rate, and a controller configured to assign the first ratio to the encoder and the at least one rate to each of the first rate units based on conditions of the channels. | 2009-03-12 |
20090067544 | METHOD FOR RECOVERING A BASEBAND SIGNAL FROM AN RF SIGNAL - By shifting an RF signal to IQ components of a modulated baseband signal directly, the zero-IF technology and IQ interface are applied in ATSC, NTSC, and PAL systems, and VSB and SSB modulations. The mathematic calculations are based on Fourier transform for shifting the RF signal and for recovering a baseband signal from the modulated baseband signal. | 2009-03-12 |
20090067545 | Receiver of high speed digital interface - A receiver of a high speed digital interface includes at least one differential amplifier, a pair of resistive elements, a current source and a pair of transistors. The differential amplifier receives a small differential signal at a pair of input terminals and outputs an amplified differential signal. Each of the resistive elements has one end coupled to one of the input terminals of the differential amplifier and the other end receiving a reference voltage. The pair of transistors has drains respectively coupled to the input terminals of the differential amplifier, sources commonly coupled to the current source and gates receiving a differential feedback signal derived from the amplified differential signal. | 2009-03-12 |
20090067546 | Method for Compensating Electromagnetic Data - Method for compensating for phase errors in electromagnetic data by exploiting the frequency scaling properties of electromagnetic fields. The data are obtained at various source-receiver offsets. Then, temporal frequency components of the data at each offset R are determined. Next, the phase spectrum (phase vs. offset) for each of the frequency components is determined. Then, the phase spectra for the different frequencies f are displayed vs. scaled offset R√ω, where ω=2πf. Finally, the phase spectra are then adjusted such that the differences in phases for the different frequencies are reduced. The adjustment process can be repeated until phase differences are reduced to an acceptable level. | 2009-03-12 |
20090067547 | METHOD AND APPARATUS FOR PROCESSING SELECTDINTERPLACE OPERATION IN OPEN STATE IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for processing SelectedInterlace operation in open state in a wireless communication system is described. It is determined if a SelectedInterlaceResponse message with SelectedInterlaceEnabled set to ‘1’ is sent. A SelectedInterlaceOn mode is entered. A shared signaling channel (SSCH) block is sent to an access terminal on a set of interlaces. It is determined if a SelectedInterlaceAckRequest message with the SelectedInterlacesEnabled field equal to ‘0’ is received. | 2009-03-12 |
20090067548 | DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA - A digital broadcast system and a data processing method are disclosed. A receiving system of the digital broadcast system includes a signal receiving unit, a demodulating unit, a program table decoder, and a controller. The signal receiving unit receives a broadcast signal in which at least one parade and main service data are multiplexed, each parade including mobile service data and data of at least one section of a program table for decoding the mobile service data. The demodulating unit demodulates data of at least one parade included in the broadcast signal. The program table decoder scans at least one demodulated parade, receives each section of the program table from the scanned parade to construct a corresponding program table, and parses the constructed program table to output program table information. The controller controls decoding of the demodulated mobile service data according to the parsed program table information. | 2009-03-12 |
20090067549 | Optimal Two-Layer Coherent Demodulation for DPSK (Differential Phase Shift Keying) - A D-PSK demodulator utilizes a two-layer coherent approach to estimate the phase shift of adjacent symbols. There is generated a probability set of each received symbol being one of possible constellation values. There is also generated a probability set of each of possible phase difference between two adjacent symbols. This probability set is then converted into soft bit information according to specific mathematical operation. | 2009-03-12 |
20090067550 | METHOD AND SYSTEM FOR REDUNDANCY-BASED DECODING OF AUDIO CONTENT - Aspects of a method and system for redundancy-based decoding of audio content are provided. A redundancy parameter may be generated for verifying a decoded bit sequence that comprises audio content, such as a decoded audio frame. The redundancy parameter may be a cyclic redundancy check (CRC) value and/or a length of frame value associated with the decoded audio frame. Information associated with the redundancy parameter may be comprised within a header of the audio frame. For example, a length of frame value, a bitrate value, a sampling rate frequency value, and/or a frame padding value may be comprised within the header of the audio frame. If the verification of the decoded audio frame fails, subsequent decoding of the previously decoded audio frame may be performed by imposing at least one physical constraint that results from the encoding of the audio frame. | 2009-03-12 |
20090067551 | GENERATING AND COMMUNICATING SOURCE IDENTIFICATION INFORMATION TO ENABLE RELIABLE COMMUNICATIONS - A method of generating Source Identification information from a source packet stream and reliably transmitting the Source Identification information from a source to a destination over a communications channel is provided. The method operates on a set of source packets, wherein Source Identification information for each source packet to be transmitted is derived and delivered with the Source Identification information of all or most other source packets of an associated source block. The method includes techniques to minimize the network bandwidth required to deliver Source Identification information and techniques to overcome network impairments. When combined with FEC techniques, retransmission techniques, or combinations of FEC techniques and retransmission techniques, the methods described herein allow receivers to recover lost source packets, while simultaneously ensuring that the original source packets are not modified and thereby ensuring backwards compatibility for legacy receivers. | 2009-03-12 |
20090067552 | Method for the Detection of Symbols and Associated Receiver - Method for the detection of symbols by a receiver, each symbol (S | 2009-03-12 |
20090067553 | JOINT SYMBOL, AMPLITUDE, AND RATE ESTIMATOR - The system in one embodiment relates to tightly integrating parameter estimation, symbol hypothesis testing, decoding, and rate identification. The present invention provides Turbo-decoding for joint signal demodulation based on an iterative decoding solution that exploits error correction codes. The system iteratively couples an initial amplitude estimator, a symbol estimator, a bank of decoders, and a joint amplitude estimator to produce the symbol estimates. | 2009-03-12 |
20090067554 | High throughput and low latency map decoder - In digital communication systems forward error correction coding techniques are typically used to improve the bit error rate performance. The receiver of the digital communication systems employs a decoding apparatus which may use Maximum A posteriori Probability (MAP) algorithm and its variations such as Logarithmic-MAP (Log-MAP), Maximum-Logarithmic-MAP (Max-Log-MAP). MAP decoding apparatus is commonly used as a key component in of decoder for error correcting codes such as convolutional codes and turbo codes. The MAP decoding apparatus computes likelihood estimates as the output. The present invention performs faster MAP decoding by computing likelihood estimates in parallel. | 2009-03-12 |
20090067555 | FILTER CIRCUIT, RECEIVER USING THE SAME AND FILTERING METHOD - A filter circuit includes a sampler which samples an input signal to generate a first analog signal, an analog-to-digital converter which converts the first analog signal into a first digital signal, a digital filter which extracts a signal component out of a desired band from the first digital signal to generate a second digital signal, a digital-to-analog converter which converts the second digital signal into a second analog signal, a delay device which imparts a signal delay to the first analog signal to supply a third analog signal, the signal delay being equal to a delay time of the second analog signal relative to the first analog signal, and a subtracter which subtracts the second analog signal from the third analog signal to generate an output signal. | 2009-03-12 |
20090067556 | Communications adaptive automatic gain controller - An adaptive scaling processor operates in combination with a conventional automatic gain control controller providing an amplification gain A to m-ary symbol-modulated communication signals, the scaling processor scaling by a scaling factor Z the m-ary communication signal for providing an over all gain of an (A)(Z) product minimizing the BER that is optimum for the communications channel for improved BER performance in communication systems. | 2009-03-12 |
20090067557 | Accurate Channel Quality Indicator for Link Adaptation of MIMO Communication Systems - A method for performing link adaptation in a Multiple Input Multiple Output (MIMO) system comprises: receiving a signal at a receiving unit of the MIMO system, calculating channel state information (CSI) from the received signal, and calculating a plurality of values of a parameter from the CSI, the parameter mapping to an error rate of the system, the mapping being substantially one-to-one within a range of interest of the error rate, each one of the calculated values corresponding to one of a plurality of Modulation Coding Schemes (MCSs). | 2009-03-12 |
20090067558 | METHOD FOR ESTIMATING, IN A COMMUNICATION SYSTEM, THE LEVEL OF INTERFERENCE PLUS NOISE AFFECTING RECEIVED SIGNALS REPRESENTATIVE OF A SET OF RECEIVED PILOT SYMBOLS - The present invention concerns a method for estimating, in a communication system, a level of interference plus noise affecting received signals representative of a set of received pilot symbols, characterized in that the method comprises the steps of:
| 2009-03-12 |
20090067559 | SYSTEM AND METHOD FOR HIGH-SPEED DECODING AND ISI COMPENSATION IN A MULTI-PAIR TRANSCEIVER SYSTEM - A method and a system for providing ISI compensation to an input signal in a bifurcated manner. ISI compensation is provided in two stages, a first stage compensates ISI components induced by characteristics of a transmitter's partial response pulse shaping filter, a second stage compensates ISI components induced by characteristics of a multi-pair transmission channel. First stage ISI compensation is performed in an inverse response filter having a characteristic feedback gain factor K, during system start-up. Second stage ISI compensation is performed by a single DFE in combination with a MDFE operating on tentative decisions output from a Viterbi decoder. As the DFE of the second stage reaches convergence, the feedback gain factor K of the first stage is ramped to zero. | 2009-03-12 |
20090067560 | Parallel decoder - A parallel decoder for decoding a code division multiplexed (CDM) signal. The parallel decoder has two matched filters, both operating at a frequency equal to half the chip rate of the CDM signal. One matched filter correlates odd-numbered chips of the CDM signal with odd-numbered chips of the spreading code. The other matched filter correlates even-numbered chips of the CDM signal with even-numbered chips of the spreading code. The two resulting correlated signals are combined, and the decoded signal is obtained from the combined signal. This arrangement doubles the maximum possible chip rate of the CDM signal. | 2009-03-12 |
20090067561 | System and method for generating linear time code data - The present invention relates to a linear time code (LTC) generator that is adapted to generate LTC data. The LTC generator comprises a rising edge detector that is adapted to detect a frame sync input corresponding to a beginning of a frame time of video data and to generate a first synchronization signal corresponding to the frame sync input and a frame length measurement block that is adapted to count a number of clock cycles in the frame time. The LTC generator further comprises a bit rate calculator that is adapted to determine a bit rate of the frame time based on the number of clock cycles in the frame time and a bit rate counter block that is adapted to generate a second synchronization signal corresponding to the bit rate. Finally, the LTC generator comprises an output device that is adapted to insert a first data bit of the LTC data into a digital bit stream according to the first synchronization signal and to insert subsequent data bits of the LTC data ( | 2009-03-12 |
20090067562 | DOPPLER TRACKING METHOD AND DEVICE FOR A WIDE BAND MODEM - A system and method for estimating and tracking the frequency offset for a transmission system whose bandwidth is not insignificant with respect to the central frequency, the system transmitting a waveform including fixed carriers whose level is substantially greater than that of the carriers transporting the information, the carriers having frequencies F | 2009-03-12 |
20090067563 | FREQUENCY SYNTHESIZER, COUPLED DIVIDE-BY-N CIRCUIT, CURRENT-REUSE MULTIPLY-BY-M CIRCUIT - A frequency synthesizer is provided in the present invention. The frequency synthesizer includes a single phase-locked loop having a reference frequency signal input, a first output, a second output and a pair of divide-by-N circuits coupled with each other and electrically connected to the second output; a multiply-by-M circuit having a first input electrically connected to the first output and a third output; and a combination of a buffer and a mixer having a second input electrically connected to the second output and a third input electrically connected to the third output generating a frequency signal output. | 2009-03-12 |
20090067564 | System For Exchanging A Control Rod Drive - A system for exchanging a control rod drive of a nuclear reactor is provided. The system may include an integrated drive exchange assembly system (IDEAS). The IDEAS may include a trunnion cart attached to a tower assembly. The tower assembly may include an integrated extension carriage assembly. | 2009-03-12 |
20090067565 | Nuclear engineering plant and closure apparatus for its containment - A nuclear engineering plant has a containment, whose interior chamber is subdivided by a wall into a systems chamber and an operating chamber which is accessible during normal operation. The containment ensures a particularly high operational reliability, in particular also in incident situations, in which hydrogen is released in the systems chamber. For this purpose, a number of overflow openings are provided in the partition wall, the respective overflow opening is closed by a closure element of a closure apparatus which opens automatically when a trigger condition associated with the respective overflow opening is reached. Closure apparatuses are provided which open both as a function of pressure and independently of pressure. The closure apparatus furthermore has a closure element containing a bursting film or a bursting diaphragm. The closure apparatus is configured such that it frees the overflow opening automatically when a predetermined environment-side trigger temperature is reached. | 2009-03-12 |
20090067566 | FUEL ASSEMBLY AND PLUG-IN DISTANCE ELEMENT - This invention relates to nuclear engineering and may be used in structures of nuclear fuel assemblies, especially those used in PWR and BWR nuclear reactors. A fuel assembly comprises spacing grids comprising cells formed by orthogonal crossing plates. An insertable spacing element is installed in each cell, which is designed for fixing the fuel rod passing through the cell. In the spacing grids that are arranged between the first spacing grid and the last spacing grid downstream the coolant flow at least some cells, through which the fuel rods pass, are provided with deflectors designed for mixing the coolant flow. The insertable spacing element comprises a shell, which has a cross-section in the form of an octagon formed by four facets that are rounded and convex in the direction from the center of said element and by four facets located therebetween that are shaped and concave toward the center of the said element. The result is that cell stiffness is increased, and hydraulic resistance to a coolant flow is reduced. | 2009-03-12 |
20090067567 | FRACTIONAL FREQUENCY DIVIDER - A divide-by-N/(N+0.5) frequency divider is disclosed. Two pairs of flip-flops are respectively triggered by an input clock and an inverted input clock, and a frequency-dividing selector is used to select one output of the two pairs of flip-flops as frequency-divided output signal. Two latches are respectively triggered by the input clock and the inverted input clock, and a modulus selector is used to select one output of the two latches. A modulus logic circuit determines being in either N frequency-dividing mode or (N+0.5) frequency-dividing mode based on a modulus control signal. A frequency-dividing logic circuit receives output of the modulus logic circuit and an inverted frequency-divided output signal to swallow half the input clock per output cycle in the (N+0.5) frequency-dividing mode, therefore obtaining division resolution of half the input clock. | 2009-03-12 |
20090067568 | SYSTEM AND METHOD FOR X-RAY BASED ASSESSMENT OF ANEURYSM PULSATION - A method of assessing rupture risk of an aneurysm from time-resolved images includes injecting a contrast enhancing agent into a patient with an aneurysm, using an electrocardiogram (ECG) signal to trigger an image acquisition run, wherein a sequence of 2D X-ray fluoroscopic images is acquired along with a corresponding ECG signal value, rotating a C-arm attaching the X-ray fluoroscopic imaging apparatus during said image acquisition run, wherein the images in said X-ray fluoroscopic image sequence are acquired from a rotating viewpoint, sorting the images in said X-ray fluoroscopic image sequence into time windows of the cardiac cycle based on the ECG signal, and constructing one or more 3-dimensional (3D) angiography image volumes of said aneurysm from said 2D fluoroscopic image sequence. | 2009-03-12 |
20090067569 | GAIN CORRECTION FOR A CT SYSTEM - A method for imaging unknown objects in a computed tomography (CT) system, comprising determining ray gain for a known object is provided. A CT reconstruction is performed with the known object to obtain reconstructed values. Ideal values are obtained for pixels of the known object. An error related to a difference between the reconstructed values and the ideal values is generated. A ray gain is estimated that reduces the error. | 2009-03-12 |
20090067570 | Computed tomography method and apparatus for a dynamic image of a moving site - When a repeatedly periodically moving site of a to-be-examined subject in a gantry is subjected to computed tomography and is reconstructed, the gantry is rotated in synchronization with the movement of the periodically moving site, and a dynamic image showing a transient phenomenon is obtained in which the periodic movement of the moving site has been stopped. As a result, the flow of a contrast agent or the like can be observed in a state of stopping the movement of an internal organ that moves repeatedly periodically. | 2009-03-12 |
20090067571 | COMPUTED TOMOGRAPHY SYSTEM AND APPARATUS - A computed tomography system is disclosed herein. The computed tomography system includes a rotatable gantry portion and an x-ray source mounted to the rotatable gantry portion. The computed tomography system also includes a detector assembly mounted to the rotatable gantry portion and positioned to receive an x-ray beam from the x-ray source. The detector assembly includes a plurality of x-ray attenuating collimation plates with a generally x-ray translucent stiffening member attached to one or more of the plurality of x-ray attenuating collimation plates. | 2009-03-12 |
20090067572 | Measurement of Lead by X-Ray Fluorescence - A method, instrument, and computer program software product for characterizing a sample with respect to the presence of a specified element, either as a constituent of a surface layer or of the bulk of the sample. Intensities of fluorescent emission at two characteristic emission lines are compared to establish whether the specified element is disposed above the bulk of the sample. In the case where the specified element is disposed above the bulk of the sample, an areal density of the specified element is determined, whereas in the case where the specified element is disposed within the bulk of the sample, a volumetric concentration of the specified element within the sample is determined. | 2009-03-12 |
20090067573 | X-ray measurement of properties of nano-particles - A method for analyzing a sample includes directing one or more beams of X-rays to impinge on an area of a surface of the sample on which a layer of nano-particles of a selected element has been formed. Secondary X-ray radiation from the area is detected responsively to the one or more beams. A distribution of the nano-particles on the surface is characterized based on the detected radiation. | 2009-03-12 |
20090067574 | Neutron-gamma ray tomography - A neutron-gamma ray tomography system comprises a source, a detector array, and an image processor. The source illuminates an object with a dual neutron-gamma ray beam. The detector array characterizes neutron and gamma ray attenuation in the object. The image processor generates tomography as a function of the neutron and gamma ray attenuation. | 2009-03-12 |
20090067575 | Radiation scanning units including a movable platform - A scanning unit for inspecting objects comprises in one example a radiation source, a movable platform to support an object, and a detector positioned to receive radiation after interaction of radiation with the object. The platform is movable at least partially within a cavity defined, at least partially, below at least one of the source or the detector. In another scanning unit, a first conveyor conveys an object to a movable platform, and second and third conveyors convey the object from the platform. The second and third conveyors are at different vertical heights. In another scanning unit, images from an energy sensitive detector and a spatial detector are fused. In a method, scanning parameters during CT scanning are changed and images reconstructed before and after the change. In another method, an object is scanned with X-ray beams having first and second energy distributions, generated by the same X-ray source. | 2009-03-12 |
20090067576 | Online verification of radiation field, collimator position and/or leakage - A system includes delivery of treatment radiation to a target, acquisition of an image representing the treatment radiation during delivery of the treatment radiation, determination of a position of a leaf of a collimator delivery of the treatment radiation based on the image, and presentation of a notification of an error during delivery of the treatment radiation based on the determined position. | 2009-03-12 |
20090067577 | PATIENT ALIGNMENT SYSTEM WITH EXTERNAL MEASUREMENT AND OBJECT COORDINATION FOR RADIATION THERAPY SYSTEM - A patient alignment system for a radiation therapy system. The alignment system includes multiple external measurement devices which obtain position measurements of components of the radiation therapy system which are movable and/or are subject to flex or other positional variations. The alignment system employs the external measurements to provide corrective positioning feedback to more precisely register the patient and align them with a radiation beam. The alignment system can be provided as an integral part of a radiation therapy system or can be added as an upgrade to existing radiation therapy systems. | 2009-03-12 |
20090067578 | X-RAY TUBE AND METHOD FOR DETERMINATION OF FOCAL SPOT PROPERTIES - X-ray tube and method for determination of focal spot properties. The invention relates to an x-ray tube ( | 2009-03-12 |
20090067579 | RADIATION SYSTEMS HAVING TILTABLE GANTRY - A radiation system includes a gantry having an opening and a first axis associated with the opening, a radiation source coupled to the gantry, a first bearing located adjacent a left side of the gantry, and a second bearing located adjacent a right side of the gantry, wherein the gantry is tiltable about the first and second bearings, the first and second bearings forming a second axis that is at a first angle relative to the first axis. A radiation system includes a gantry having an opening and a first axis associated with the opening, a radiation source coupled to the gantry, and a base to which the gantry is rotatably coupled, wherein the gantry is tiltable relative to the base about a second axis that forms an angle relative to the first axis, wherein an uppermost portion of the gantry is not coupled to a support frame of the gantry. | 2009-03-12 |
20090067580 | X-ray Device Having a Column and Having a Cantilever Arm Whose Height can be Displaced on the Column - The invention relates to an X-ray device ( | 2009-03-12 |
20090067581 | UNIVERSAL X-RAY TEST BED - Systems and methods presented herein provide for the testing and reconfiguration of x-ray devices. In one embodiment, a test bed effectuates testing of an acquired x-ray device to determine a cause of the inoperability of the device. The x-ray device test bed may be provided to test a plurality of x-ray devices and, therefore, readily adaptable to such devices. The x-ray device test bed may include a mount for an x-ray tube. A variable power supply may be coupled to the x-ray tube to provide the requisite high-voltage electrical energy thereto. The x-ray device test bed may also include a mount for an imaging module (e.g., a “flat-panel sensor”). A processor may be coupled to the imaging module to determine the operational characteristics thereof. If certain x-ray components are deemed inoperable, the x-ray components may be replaced such that the x-ray device may be reintroduced to a medical industry segment. | 2009-03-12 |
20090067582 | IMAGING TARGET FOR TESTING QUALITY OF MULTIPLE-MAGNIFICATION FOCUS AND IMAGE CO-REGISTRATION - An imaging target, suited for use in multi-modal imaging systems, includes test patterns for testing quality of both focus and co-registration for multiple magnifications and multiple modalities of operation of a multimodal imaging system. | 2009-03-12 |
20090067583 | Method for determining an imaging rule and method for generating a 3D reconstruction - It is possible that at a predetermined position of the imaging components of a radiographic imaging system the object is not fully viewed. The object can be a calibration phantom, which means that it is not possible to directly determine an imaging rule with the aid of the calibration phantom at this position of the imaging components. According to the invention, an imaging of the calibration phantom at a different position takes place and an imaging rule for this position is determined. This is then converted, provided a movement parameter is known which describes the movement from the position with the record of the calibration phantom to a different position. The imaging rule obtained in this way can be further improved, e.g. with the aid of a recording of the calibration phantom from the position in question, including if the calibration phantom is not completely imaged. | 2009-03-12 |
20090067584 | PROCESSING AND REPORTING SITUATIONAL INFORMATION TO EMERGENCY SERVICE PROVIDERS - A system and method for processing and reporting situational information to emergency service providers in an emergency service communications network is disclosed. An emergency situation is monitored. Responsive to detecting the emergency situation, information relating to the emergency situation is collected. Then, the information is processed and stored in a database. The processed information is then reported to emergency service providers. | 2009-03-12 |
20090067585 | DIAGNOSTIC AND INTERVENTION TOOLS FOR EMERGENCY MEDICAL DISPATCH - A system and method assists an emergency medical dispatcher in responding to emergency calls. A computer implemented emergency medical dispatch protocol includes interrogatories for a dispatcher to ask a caller to generate an appropriate response. A diagnostic tool is provided to determine a vital sign of a patient based on a timer and caller relayed information about the patient. An intervention tool is provided to administer assistance and determine a compression rate based on a timer and caller relayed information. | 2009-03-12 |
20090067586 | Remote media call center - The call center processing system disclosed enhances the capabilities of traditional call centers. In particular, the processing system allows a call center to receive, aggregate, and index many different types of media obtained from a wide variety of sources and that relate to many different types of incidents. Thus, for example, the processing system provides a third party with the option of submitting call phone camera pictures, audio input, video camera footage, and other types of media when reporting an incident to the call center. The call center may be an emergency number (e.g., 911) call center, a service center (e.g., for a home appliance), a news reporting call center, or any other type of interactive information exchange. | 2009-03-12 |