43rd week of 2008 patent applcation highlights part 34 |
Patent application number | Title | Published |
20080259982 | SEMICONDUCTOR LASER DIODE FORMED WITH WINDOW AT CLEAVAGE FACET AND FABRICATING METHOD THEREOF - The semiconductor laser diode formed with a window at a cleavage facet and a fabricating method thereof are disclosed, wherein a ridge adjacent to a cleavage facet of the semiconductor laser diode and part of the p-clad layer underneath the ridge are etched to form a window, such that a current is not applied to along the cleavage facet to thereby prevent the cleavage facet from being degraded and to enhance reliability of the diode. | 2008-10-23 |
20080259983 | SEMICONDUCTOR QUANTUM CASCADE LASER AND SYSTEMS AND METHODS FOR MANUFACTURING THE SAME - A bipolar quantum cascade (QC) laser includes a p-n junction disposed adjacent to an active/injection region of semiconductor layers. Systems that make use of such QC lasers and methods for manufacturing such QC lasers are also described. | 2008-10-23 |
20080259984 | STRUCTURE HAVING PHOTONIC CRYSTAL LAYER AND SURFACE EMITTING LASER INCLUDING THE SAME - A structure has a photonic crystal layer comprising a first member made of a material having a first refractive index; and a second member made of a material having a second refractive index, wherein the first member has a plurality of holes periodically arranged, and the second member is placed in each of the holes so that a center of the second member is staggered from a center of the hole on a plane of the photonic crystal layer. | 2008-10-23 |
20080259985 | Method And Apparatus For Modifying Out Of Band Reflection For A Laser Element - A method and apparatus for modifying the out of band reflection of a laser element is described. The laser element includes an active medium excited by optical pumping means to produce stimulation emission of light. The laser element further includes a Bragg grating structure for providing optical feedback for the active medium, with the Bragg grating structure including a phase transition region providing a change in phase. The change in phase of the phase transition region is adjusted to modify out of band reflection of said laser element. | 2008-10-23 |
20080259986 | Laser light source apparatus and image generating apparatus using such laser light source apparatus - Disclosed is a laser light source apparatus. The laser light source apparatus includes a pumping light source and a pair of resonator mirrors. In the laser light source apparatus, the pumping light source includes at least a laser medium and a wavelength conversion element, and the laser medium is pumped by light having a multi-transversal mode pattern and the wavelength conversion element are irradiated with a line beam of fundamental wave obtained by the oscillation by the laser medium to output a line beam of converted wave. The laser light source apparatus further includes at least one reflector bending light path is provided in the resonator such that a longitudinal direction of the line beam of fundamental wave is approximately perpendicular to an incident plane of the reflection unit. | 2008-10-23 |
20080259987 | Enhanced Emission of Light From Organic Light Emitting Diodes - A device comprising an organic light emitting diode coupled to a cavity, said cavity containing an emitting species, said device being arranged such that light emitted from said organic light emitting diode is at least partially absorbed by the emitting species and re-emitted from the emitting species. The device may be arranged such that the emitting species acts as the gain media of a laser, and the organic light emitting diode may be arranged to pump the emitting species. Also provided is method of generating light, said method comprising: coupling an organic light emitting diode to a cavity, said cavity containing an emitting species, said organic light emitting diode and said cavity being arranged such that light emitted from said organic light emitting diode is at least partially absorbed by the emitting species; operating said organic light emitting diode to emit light which is at least partially absorbed by the emitting species; and re-emitting light from the emitting species. | 2008-10-23 |
20080259988 | OPTICAL ACTUATOR WITH IMPROVED RESPONSE TIME AND METHOD OF MAKING THE SAME - An optical actuator having an improved response time and an improved frequency operational range due to the reduced mass of a substrate coupled to an actuator and method of making the same. The optical actuator may be formed by adhering an uncoated substrate to the actuator using an epoxy. Once cured, any deformities and irregularities in a top surface of the substrate are removed. An optical coating is then applied to the top surface of the substrate. Once finished, the optical actuator may be used in a laser resonating cavity. Further, the optical actuator desirably may have a resonant frequency of about 150 kHz. | 2008-10-23 |
20080259989 | Systems and Methods for Temperature Measurement Using N-Factor Coefficient Correction - Various systems and methods for temperature measurement are disclosed. For example, some embodiments of the present invention provide temperature measurement systems. Such temperature measurement systems include a variable current source and a diode connected transistor. The variable current source is capable of applying two or more distinct currents to the diode connected transistor. The currents result in a different base-emitter voltage on the diode connected transistor. The systems further include an n-factor coefficient register and an analog to digital converter. The analog to digital converter is operable to receive two of the base-emitter voltages created by applying the different currents, and to provide a digital output based at least in part on a value stored in the n-factor coefficient register and the two base-emitter voltages. | 2008-10-23 |
20080259990 | TEMPERATURE SENSOR CIRCUIT AND CALIBRATION METHOD THEREOF - A temperature sensor circuit comprises a first monitor voltage generation circuit that generates a first monitor voltage with a characteristic that changes with respect to temperature; a second monitor voltage generation circuit that generates a second monitor voltage with a characteristic that changes by a variation amount different from the first monitor voltage with respect to the temperature; and a differential amplifier circuit, to which the first and second monitor voltages are inputted and that outputs the result of comparing the two voltages. Further, the differential amplifier circuit of the temperature sensor circuit is capable of switching to a first connection state, which outputs the comparison result, and to a second connection state, which outputs an offset monitor voltage that is rendered by adding the offset voltage of the differential amplifier circuit to the first or second monitor voltage or subtracting the offset voltage therefrom. | 2008-10-23 |
20080259991 | Apparatus and method incorporating an indicator chamber for elevated temperature pressure vessel or weld testing - In a method and system for testing the integrity of pressure vessels, or welds on flanges or the like, at elevated temperatures, a pressurized mixture of a gaseous environmentally safe composition is formed within an indicator chamber in a housing receiving a pressurized gas and containing a surface in the chamber upon which is placed an indicator composition including a marker component, whereby the marker component is carried by the carrier gas from within the chamber and through a conduit to the pressure vessel or weld area. The carrier gas and the indicator or marker component are injected in an area between the inner and outer weld of a terminal flange welded to a tubular pipe section or casing. The pressurized composition includes a marker component or sub-composition which is detected by a detection apparatus which scans the pressure vessel area to be tested, or weld area. The pressure of the gas may also be monitored to observe losses in pressure indicative of flaws in the pressure vessel area or welds. The integrity of the pressure vessel or welds is tested at elevated temperature permitting remedial repairs to be made without reheating the work area of the pressure vessel or on a tubular pipe or casing. | 2008-10-23 |
20080259992 | RESONANCE TAG WITH TEMPERATURE SENSOR - A temperature-history sensor includes a resonance circuit composed of at least a capacitor and a coil. The temperature-history sensor has a display for indicating a predetermined set temperature of the temperature-history sensor. The capacitor has at least a thermofusion material between electrodes of the capacitor, and the melting point of the thermofusion material is in the region of the set temperature. | 2008-10-23 |
20080259993 | Moisture Meter with Non-Contact Infrared Thermometer - A moisture meter with non-contact temperature measurement capability having a housing, a moisture-detecting device coupled to or contained at least partially in the housing, and having an output related to measured moisture parameters, a non-contact, optically-based temperature sensing device coupled to the housing, having an output related to sensed temperature, an output display contained in the housing, for displaying measurements to a user, and circuitry contained in the housing for processing both the moisture-detecting device output and the non-contact temperature sensing device output, and transmitting the processed outputs to the output display. The moisture-detecting device can be either one or both of a contact-type moisture-detecting device such as a pad on the rear side of the housing, and a pin-type moisture-detecting device in a hand-held probe, and electrically coupled to the circuitry in the housing through a cord. | 2008-10-23 |
20080259994 | Infrared Radiation Temperature Measuring System with Error Source Radiance Optical Filtering System and Method Using the Same - Disclosed herein is a system and method for measuring radiation temperature through filtration of optical error sources, which can measure surface temperatures of a heating substance within a heating furnace. The system comprises a front lens to collect infrared rays from a measuring target and from surroundings, a pin hole plate having a pin hole formed therein to allow only the infrared rays emitting from the measuring target area to pass therethrough, a rear lens to convert the infrared rays having passed through the pin hole into horizontal infrared rays, a condenser lens to collect the infrared rays having passed through the rear lens, and a radiation pyrometer to measure a temperature of the infrared rays having passed through the filtering unit. The system possible can ensure accuracy and reliability in temperature measurement, and can provide highly precise combustion control, operation stability, and improvement in quality of products. | 2008-10-23 |
20080259995 | TEMPERATURE MEASURING PROBE, IN PARTICULAR FOR A HOUSEHOLD APPLIANCE - A temperature measuring probe with a hollow outer shell including an electrically conductive section and an electrically insulating section. A temperature sensor including a resonator is disposed in the electrically conductive section and electrically conductively connected to the electrically conductive section. An antenna including a shortened monopole is disposed in the electrically insulating section. The temperature sensor and the antenna are electrically conductively connected to each other. A respective material and respective dimension of the electrically insulating section and the antenna are matched such that an effective resistance of the antenna is approximately equal to an effective resistance of the temperature sensor in an operating frequency range of the temperature sensor. | 2008-10-23 |
20080259996 | METHOD OF SIGNALLING TEMPERATURE AND/OR BENEFIT AGENT RELEASE USING BAR COMPOSITION COMPRISING THERMOCHROMIC PIGMENT OR DYE - The invention relates to method of signaling temperature and/or benefit agent release using bar compositions comprising thermochromatic pigment or dye. In a preferred embodiment, the pigment is introduced in the form of a separate domain (e.g., separate chips) which separate chip or chips is combined with a surfactant-containing chips to form the final bar. | 2008-10-23 |
20080259997 | Systems and Methods for PWM Clocking in a Temperature Measurement Circuit - Various systems and methods for pulse width modulated clocking in a temperature measurement are disclosed. For example, some embodiments of the present invention provide temperature measurement systems with a variable current source, a transistor, and a pulse width modulation circuit. The variable current source is operable to provide a first current and a second current that are applied to the transistor. A first base-emitter voltage occurs on the transistor when the first current is applied, and a second base-emitter voltage occurs on the transistor when the second current is applied. The first base emitter voltage is associated with a first sample period, and a second base-emitter voltage is associated with a second sample period. The pulse width modulation circuit provides a pulse width modulated clock including a combination of the aforementioned first period and second period. | 2008-10-23 |
20080259998 | TEMPERATURE SENSOR WITH DIGITAL BANDGAP - A system comprises a temperature sensor generate multiple base-emitter voltage signals by sequentially providing various currents to a transistor, and a system controller to determine a differential voltage signal according to the multiple base-emitter voltage signals, the differential voltage signal proportional to an environmental temperature associated with the transistor. | 2008-10-23 |
20080259999 | Systems and Methods for Resistance Compensation in a Temperature Measurement Circuit - Various systems and methods for temperature measurement are disclosed. For example, some embodiments of the present invention provide methods for temperature measurement that include exciting a provided transistor with at least four sequential input signals of different magnitudes. In response, the transistor exhibits a sequence of output signals corresponding to the four sequential input signals. The sequence of output signals is sensed using a different gain for each of the output signals included in the sequence of output signals, and the output signals included in the sequence of output signals are combined such that the combined output signals eliminates a resistance error. The combined output signals are then used to calculate a temperature of the transistor. | 2008-10-23 |
20080260000 | Method and System for Capacity and Coverage Enhancement in Wireless Networks With Relays - A method and system for capacity and coverage enhancement in wireless networks is provided. Each cell has a base station and in-cell relay stations. The base station includes interference avoidance/averaging mechanism, dynamic resource partitioning mechanism or a combination thereof. The interference avoidance/averaging mechanism dynamically creating a FH pattern based on interference information obtained from its serving cell. The base station may include a scheduler for dynamic resource partitioning mechanism for managing scheduling in the cell. | 2008-10-23 |
20080260001 | Time-multiplexed binary offset carrier signaling and processing - Methods and systems for direct sequence spread spectrum (DSSS) signals are described herein. In an embodiment, a DSSS signal includes a time multiplexed spreading time series. The time multiplexed spreading time series includes a data spreading time series includes at least a first spreading symbol, and a pilot spreading time series includes at least a second spreading symbol and a third spreading symbol. The second spreading symbol and the third spreading symbol are different. | 2008-10-23 |
20080260002 | ANTENNA SELECTION AND TRAINING USING A SPATIAL SPREADING MATRIX FOR USE IN A WIRELESS MIMO COMMUNICATION SYSTEM - A wireless communication system and method uses a spatial spreading matrix to distribute the encoded spatial data streams to a number of transmit chains and further uses the spatial spreading matrix for antenna selection computation in a transmitter. The spatial spreading matrix is designed such that a receiver is able to know and utilize the spatial spreading matrix for computing transmission antenna selection, receiver antenna selection and joint transmission/receiving antenna selection. The use of this spatial spreading matrix for antenna selection computation provides increased accuracy in antenna selection for transmission of spatial data streams, where the number of spatial data streams is less than the number of transmit or receive chains between the transmitter and receiver, and the number of transmit or receive chains is less than the corresponding transmission or receiving antennas. | 2008-10-23 |
20080260003 | Method for Transmitting a Multicarrier Spectrum-Spread Signal, Reception Method, Corresponding Transmitting, Receiving Device and Signal - A method is provided for transmitting a multicarrier spectrum-spread signal, using a plurality of spreading codes. The method includes a step of allocating a power and/or rate to each of the spreading codes, based on an information representing the noise and/or on an information representing the quality of the link, said allocating step taking into account a target rate. | 2008-10-23 |
20080260004 | SYSTEMS AND METHODS FOR DUAL-CARRIER MODULATION ENCODING AND DECODING - Systems and methods for dual-carrier modulation (DCM) encoding and decoding for communication systems. Some embodiments comprise a DCM encoder for applying a pre-transmission function to at least one 16-QAM input symbol and mapping resulting transformed symbols onto at least one larger constellation prior to transmission. Some embodiments joint decode, by a DCM decoder, a predetermined number of received data elements and compute a set of log-likelihood ratio (LLR) values for at least eight bits from a resulting at least one transformed symbol. | 2008-10-23 |
20080260005 | Time-Tracking for Clustered Demodulation Elements in a Spread Spectrum System - An apparatus, such as a subscriber unit or a base station within a spread spectrum communication system, provides advanced control over the time-tracking of demodulation elements when unresolvable multipath situations arise. The apparatus provides merge protection that prevents clustered demodulation elements from contracting beyond a minimum time span. In addition, the apparatus provides a master/slave feature for synchronizing the time-tracking of the demodulation elements when clustered around a multipath signal. | 2008-10-23 |
20080260006 | IMPROVED FREQUENCY OFFSET ESTIMATOR - Determining a frequency offset of a received signal utilizing two or more multipath components of the received signal is provided herein. By way of example, the received signal can be correlated with a synchronization sequence in a time domain or a frequency domain, resulting in separation of the two or more multipath components of the received signal. Analysis of at least one of the multipath components can provide a frequency offset of the received signal. Furthermore, by analyzing the multipath components, estimation of the frequency offset can be improved as compared with single-signal analysis techniques. | 2008-10-23 |
20080260007 | Method and Apparatus for Achieving Channel Variability in Spread Spectrum Communication Systems - A method and apparatus are disclosed for modulating a communication signal in a code division multiple access (CDMA) environment using orthogonal N by N Hadamard spread spectrum codes Orthogonal spreading codes are used that have lengths that are not a power-of 2 to provide additional channel variability for various multimedia applications and increase the flexibility of the number of channels/bandwidth relationship. The Hadamard codes are multiples of 4 (4n) and demonstrate a good cross-correlation property, making them very useful in the flexible design of code division multiple access (CDMA) systems. A transmitter encodes each of to N data streams (N not being a power of 2), to be transmitted using a 4n codeword, N | 2008-10-23 |
20080260008 | METHODS AND APPARATUS FOR TIME TRACKING USING ASSISTANCE FROM TDM PILOTS IN A COMMUNICATION NETWORK - Methods and apparatus for time tracking using assistance from TDM pilots in a communication network. In an aspect, a method is provided for time tracking in a device operating on a communication network, wherein the device performs a time tracking algorithm. The method includes determining a delay spread, and modifying at least one parameter used by the time tracking algorithm based on the delay spread. In another aspect, an apparatus is provided for time tracking in a device operating on a communication network, wherein the device performs a time tracking algorithm. The apparatus includes computation logic for determining a delay spread, and control logic for modifying at least one parameter used by the time tracking algorithm based on the delay spread. | 2008-10-23 |
20080260009 | Combine Time Multiplexed Pilot (TMP) Derotation with Descrambling and Despreading in Data Correlators Used by Rake Receivers - The invention provides a code modification circuit for receiving a descrambling/dispreading code at a first input pair thereof and a pilot derotation code at a second input pair thereof, and arranged to combine the codes to form a combined code for providing to a correlator such that the correlator can recover data or a pilot signal from an input sequence supplied thereto. | 2008-10-23 |
20080260010 | Power Line Communication Methods and Devices - A power line communication method for realizing data communication between at least one first or sending power line communication partner device and at least one second or receiving power line communication partner device. The method checks transmission conditions of a plurality of possible communication channels, thereby generating transmission condition data descriptive for the communication conditions of the respective possible communication channels. Additionally, communication conditions of the plurality of possible communication channels are selected as actual communication conditions based on the transmission condition data. | 2008-10-23 |
20080260011 | Fast Modem Reconfiguration - Methods, systems, and computer program products for reconfiguring a modem. In an embodiment, fast reconfiguration of a modem occurs when a first modem determines there is a need for fast reconfiguration. The first modem signals its transition from showtime to fast reconfiguration. The first modem waits for acknowledgement from a second modem before transitioning to showtime. Once transitioned from showtime, the first modem estimates a signal to noise ratio and then exchanges parameters with the second modem. The first and second modems then transition to showtime. | 2008-10-23 |
20080260012 | Receiver and receiving method - An apparatus, including a detection unit configured to perform a non-linear detection on a receive signal, a first estimator configured to estimate a first quality measure based on the receive signal, and a second estimator configured to estimate a second quality measure dependent on the first quality measure and a performance measure of the detection unit is provided. | 2008-10-23 |
20080260013 | Equalization with Selection of Samples - A method is shown for equalizing signals transmitted via at least one transmission antenna and received by at least one reception antenna ( | 2008-10-23 |
20080260014 | Apparatus for and Method of Controlling a Feedforward Filter of an Equalizer - A method of synchronizing a feedforward filter ( | 2008-10-23 |
20080260015 | METHOD AND APPARATUS FOR IMPROVED HIGH-SPEED ADAPTIVE EQUALIZATION - A method and apparatus for improved high-speed adaptive equalization that may operate effectively even in systems experiencing severe interference by using one or more error generators and taking multiple samples across a bit interval. Advantageously, a preferred embodiment of the current invention may be deployed in a clockless configuration. Preferably, one or more controllable analog filters may be controlled by one or more microprocessors used to assess the error data from the error generators and to calculate the appropriate coefficients for the filters according to one or more error minimization algorithms. Preferably, the steps of sampling, assessment, calculation and coefficient setting may be done iteratively to converge to an optimum set of filter values and/or respond dynamically to signals with time-varying noise and interference characteristics. | 2008-10-23 |
20080260016 | Fully Adaptive Equalization for High Loss Communications Channels - An equalization circuit is disclosed that enables high data rate transmission over high loss communications channels. Also disclosed is a set of functional blocks and update criteria that allow for the equalization function to be adapted for a large variety of different communications channels. A fully continuous adaptive equalizer is used in conjunction with a Decision Feedback Equalizer to fully equalize a large number of communications channels. | 2008-10-23 |
20080260017 | SELECTIVE SLICING EQUALIZER - An equalizer. The equalizer, either operated in a blind mode or a decision directed mode, comprises a feed-forward filter, a feedback filter, a decision device, a control circuit, and a multiplexer. The feed-forward filter receives an input signal. The feedback filter filters an equalized signal. The combiner combines the feed-forward filtered signal and the feedback filtered signal. The decision device maps the combined signal to one symbol of a symbol set. The control circuit receives the combined output and generates a slice control signal. The multiplexer selects the combined signal or the mapped signal as the equalized according to the slice control signal when operated in the blind mode. | 2008-10-23 |
20080260018 | SUPPRESSION OF HIGH-FREQUENCY PERTURBATIONS IN PULSE-WIDTH MODULATION - A method suppresses high-frequency perturbations in a pulse-width modulated signal. The pulse-width modulation may superpose a carrier signal onto an input signal having a predetermined modulation frequency. The carrier signals may be phase-shifted. The resulting modulated signals may then be filtered and combined. | 2008-10-23 |
20080260019 | BURST OSCILLATION DEVICE, BURST OSCILLATION METHOD, AND RANGING/COMMUNICATION SYSTEM - The burst oscillation device 20 includes the data generation part | 2008-10-23 |
20080260020 | Method and Apparatus for Signal Processing and Encoding and Decoding Method, and Apparatus Therefor - An apparatus for processing a signal and method thereof are disclosed. Data coding and entropy coding are performed with interconnection, and grouping is used to enhance coding efficiency. The present invention includes a payload part having at least one of data coding information including pilot coding information per a frame and entropy coding information and a header part having main configuration information for the payload part. | 2008-10-23 |
20080260021 | Method of digital video decompression, deinterlacing and frame rate conversion - The digital video decompression, de-interlacing and frame conversion are done simultaneously with multiple video decompressing engines decoding multiple fields/frames at a time. The on-chip line buffer temporarily stores multiple rows of macro-block pixels of the video decoding referencing field/frame and the reconstructed field/frame and are used simultaneously in de-interlacing and frame rate conversion. | 2008-10-23 |
20080260022 | Method for making macroblock adaptive frame/field decision - A method for making macroblock adaptive frame/field (MBAFF) decision based on information of a current macroblock pair is provided. The method includes the steps of: (a) performing a spatial frame/field decision process based on spatial information of the current macroblock pair; (b) performing a temporal frame/field decision process based on temporal information of the current macroblock pair; and (c) conducting a confidence estimation to select frame coding or field coding in accordance with the information of the current macroblock pair and decisions made by the spatial and temporal frame/field decision processes before generating a bitstream corresponding to the current macroblock pair. | 2008-10-23 |
20080260023 | Digital video encoding and decoding with refernecing frame buffer compression - The digital video encoder or video decoder with referencing frame image compression and decompression mechanism allows a smaller on-chip referencing frame storage device and efficient off-chip referencing frame random access. In using the off-chip frame buffer, a predetermined amount of line buffer temporarily saves the compressed pixels and reconstructs the needed macro-block pixels according to the motion vector for motion compensation in video decoder and reconstructs the searching range pixels for motion estimation in video encoder. | 2008-10-23 |
20080260024 | METHOD, DEVICE, INTEGRATED CIRCUIT, AND TRANSCODER FOR SELECTIVELY REDUCING QUANTIZATION LEVELS - A method for selectively reducing quantization levels is adapted for use in a transcoder including a variable length decoding unit. The variable length decoding unit decodes a plurality of input variable length codes into a plurality of decoded pairs, wherein each decoded pair is a run-level pair. The method includes the following steps: (a) obtaining a plurality of absolute levels arranged in an order of scan positions according to the runs and levels of the decoded pairs; (b) determining whether a saved bit number correspondingly found by reducing each absolute level exceeds a bit number threshold value such that, if yes, the respective absolute level belongs to a target set; and (c) reducing each absolute level that belongs to the target set. | 2008-10-23 |
20080260025 | CODING RATE CONVERTING APPARATUS, INTEGRATED CIRCUIT, AND METHOD, AND PROGRAM FOR THE SAME - A coding rate converting apparatus according to the present invention re-quantizes first quantized data with a first quantization step size, using a second quantization step size larger than the first quantization step size, and includes: an inverse quantization unit generating orthogonal transform coefficients by inversely quantizing the first quantized data for each of unit blocks; a quantization unit generating second quantized data by quantizing the orthogonal transform coefficients using the second quantization step size; a filter intensity change judging unit judging whether a second filter intensity determined based on the second quantized data is changed from a first filter intensity determined based on the first quantized data; and a coefficient correcting unit generating, in the case of the second filter intensity, third quantized data by correcting the second quantized data so that a third filter intensity determined based on the third quantized data becomes equal to the first filter intensity. | 2008-10-23 |
20080260026 | Moving-picture coding apparatus, method and program - Decoded is a first stream carrying moving-picture signals coded with a first coding scheme with a first intra-picture coding and an inter-picture coding technique, thus generating decoded moving-picture data. Picture-type information on each frame or field picture of the decoded moving-picture data is generated. The picture-type information indicates a first picture type or a second picture type. The first picture type is for each picture coded with the first intra-picture coding technique whereas the second picture type is for each picture coded with the inter-picture coding technique. The decoded moving-picture data is encoded with a second coding scheme with a second intra-picture coding technique, thus generating a second stream. Auxiliary information areas are created in the second stream. Each auxiliary information area is accessible in relation to each picture of the decoded moving-picture data. The picture-type information is inserted into the auxiliary information areas. | 2008-10-23 |
20080260027 | MODE UNIFORMITY SIGNALING FOR INTRA-CODING - Techniques for efficiently signaling one or more prediction modes for blocks in a macroblock. A mode uniformity indicator is provided for each macroblock to indicate whether all blocks in the macroblock are to be predicted using the same prediction mode. In an embodiment, an encoder signals a mode uniformity indicator and a prediction mode. In another embodiment, a decoder receives a mode uniformity indicator and a prediction mode, and predicts at least two blocks of the macroblock using the prediction mode if the mode uniformity indicator is true. | 2008-10-23 |
20080260028 | Video H.264 Encryption Preserving Synchronization and Compatibility of Syntax - A method for encrypting data exchanged between an encoder and a decoder in a video system is disclosed. A set of bits which, when encoded, do not have any influence upon the decoding stage, are determined during the encoding stage. At least one part or all of the bits selected in stage 1 is/are encoded prior to transmission to the decoding stage. The bit selection stage determines the parts of the flow of bits that only modify the contexts of the decoding process in an insignificant manner in the sense that the modification due to encryption does cause desynchronization or does not lead to non-compatible bit flows with regard to encoding contexts and visual impact. The present invention is used with H.264 encoders/decoders. | 2008-10-23 |
20080260029 | STATISTICAL METHODS FOR PREDICTION WEIGHTS ESTIMATION IN VIDEO CODING - Presented herein are system(s) and method(s) for statistically prediction of weighting parameter estimation in video encoding. In one embodiment, there is presented a method for interpredicting a picture from at least one reference picture. The method comprises calculating statistics for pixels in the picture and the reference picture; generating weight parameters for the picture based on the statistics; and encoding the picture using said weight parameters. | 2008-10-23 |
20080260030 | DIRECTIONAL TRANSFORMS FOR INTRA-CODING - Techniques for transforming the prediction error of intra-coded blocks using mode-dependent transform functions. In an embodiment, an encoder selects a set of transform functions to represent prediction error based on the spatial mode used for prediction. In an alternative embodiment, a decoder reconstructs an image block by using the signaled spatial mode to derive the corresponding set of transform functions. No additional signaling between encoder and decoder is required as compared to prior art implementations. | 2008-10-23 |
20080260031 | PIXEL-BY-PIXEL WEIGHTING FOR INTRA-FRAME CODING - Techniques for improving the accuracy of prediction in intra-frame coding. A prediction mode can specify a pixel along a direction independently of other pixels along the same direction. In an embodiment, an encoder selects a prediction mode to best represent the image block. In an alternative embodiment, a decoder reconstructs each pixel in the image block by weighting neighboring pixels according to a weight matrix specified by the prediction mode. | 2008-10-23 |
20080260032 | METHOD AND APPARATUS FOR CAPTION DETECTION - Machine-readable media, methods, apparatus and system for caption detection are described. In some embodiments, a plurality of text boxes may be detected from a plurality of frames. A first percentage of the plurality of text boxes whose locations on the plurality of frames fall into a location range may be obtained. A second percentage of the plurality of text boxes whose sizes fall into a size range may be obtained. Then, it may be determined if the first percentage and the location range are acceptable and if the second percentage and the size range are acceptable. | 2008-10-23 |
20080260033 | Hybrid hierarchical motion estimation for video streams - A method for estimating image-to-image motion of a pixel block in a stream of images which includes a current image which includes the pixel block and a reference image, the method including performing a hierarchical search in a search area of the reference image, including producing a decimated reference image and a decimated pixel block, searching for a location in the search area of the decimated reference image which best fits the decimated pixel block, repeating the producing and the searching for more than one level of hierarchy, determining a first candidate location in the reference image which corresponds to the best fitting location, determining a second candidate location in the reference image by a method other than the hierarchical search, performing a search in the reference image for refined locations of the first and the second candidate locations, selecting one final location from the refined candidate locations, and using the final location for estimating the motion. Related apparatus and methods are also described. | 2008-10-23 |
20080260034 | VIRTUAL DECODED REFERENCE PICTURE MARKING AND REFERENCE PICTURE LIST - An improved system and method for implementing efficient decoding of scalable video bitstreams is provided. A virtual decoded picture buffer is provided for each lower layer of the scalable video bitstream. The virtual decoded picture buffer stores decoded lower layer pictures for reference. The decoded lower layer pictures used for reference are compiled to create a reference picture list for each layer. The reference picture list generated by the virtual decoded picture buffer is used during a direct prediction process instead of a target reference list to correctly decode a current macroblock. | 2008-10-23 |
20080260035 | Motion vector coding and decoding methods - A motion vector coding method and apparatus that improves efficiency of coding motion vectors when a current block is coded using a plurality of motion vectors. The apparatus includes a motion vector coding unit that codes a motion vector inputted from a motion vector detecting unit. A motion vector for each current block is coded based on a difference between the motion vector and a predicted vector obtained from motion vectors for previously coded neighboring blocks. The predicted vector is generated by one of the following processes: (A) the motion vectors which refer to the same picture are selected from among the motion vectors for the neighboring blocks so as to generate the predicted vector; (B) the motion vectors for the respective neighboring blocks are ordered in the predetermined order, and the motion vectors of the same order rank are selected from the ordered motion vectors so as to generate the predicted vector; and (C) the predicted vector for the second motion vector of the current block shall be the first motion vector, and if the second motion vector and the first motion vector refer to different pictures, the first motion vector is scaled according to the temporal distance between the pictures so as to generate the predicted vector. | 2008-10-23 |
20080260036 | TRANSPORT STREAM GENERATING DEVICE, TRANSMITTING DEVICE, RECEIVING DEVICE, AND A DIGITAL BROADCAST SYSTEM HAVING THE SAME, AND METHOD THEREOF - A transport stream (TS) generating apparatus, a transmitting apparatus, a receiving apparatus, a digital broadcast system having the above, and a method thereof are provided. The digital broadcast system includes a transport stream (TS) generating apparatus which generates a multi transport stream (TS) by multiplexing a normal stream and a turbo stream having a variable coding rate, a transmitting apparatus which re-constructs the multi TS by processing the turbo stream, and transmits the re-constructed multi TS, and a receiving apparatus which receives the re-constructed multi TS, and decodes the normal stream and the turbo stream respectively, to recover normal data and turbo data. Accordingly, a multi TS, which includes normal stream and a turbo stream of various coding rates, can be transmitted and received efficiently. | 2008-10-23 |
20080260037 | Variable length coding method and variable length decoding method - A variable length coding method is provided for coding coefficients in each block which are obtained by performing frequency transformation on picture data of a moving picture per block having a predetermined size, and includes: a coefficient scanning step of scanning the coefficients in the block in a predetermined order; and a coding step of coding the coefficients scanned in the coefficient scanning step into variable length codes in a predetermined order by switching a plurality of tables to be used for coding. Here, a direction of switching between the tables may be one-directional. Also, the coding may be non-arithmetic coding. | 2008-10-23 |
20080260038 | Variable length coding method and variable length decoding method - A variable length coding method is provided for coding coefficients in each block which are obtained by performing frequency transformation on picture data of a moving picture per block having a predetermined size, and includes: a coefficient scanning step of scanning the coefficients in the block in a predetermined order; and a coding step of coding the coefficients scanned in the coefficient scanning step into variable length codes in a predetermined order by switching a plurality of tables to be used for coding. Here, a direction of switching between the tables may be one-directional. Also, the coding may be non-arithmetic coding. | 2008-10-23 |
20080260039 | Variable length coding method and variable length decoding method - A variable length coding method is provided for coding coefficients in each block which are obtained by performing frequency transformation on picture data of a moving picture per block having a predetermined size, and includes: a coefficient scanning step of scanning the coefficients in the block in a predetermined order; and a coding step of coding the coefficients scanned in the coefficient scanning step into variable length codes in a predetermined order by switching a plurality of tables to be used for coding. Here, a direction of switching between the tables may be one-directional. Also, the coding may be non-arithmetic coding. | 2008-10-23 |
20080260040 | METHOD, DEVICE, INTEGRATED CIRCUIT AND ENCODER FOR FILTERING VIDEO NOISE - A method for filtering video noise is adapted to filter noise of a plurality of images of a video stream. Each image includes a plurality of pixels. The method includes the following steps: (a) dividing an image into a plurality of macroblocks; (b) classifying the macroblocks into a plurality of smooth macroblocks and a plurality of noisy macroblocks, and outputting the pixels of the smooth macroblocks; (c) classifying the pixels of each noisy macroblock into an edge pixel group and a non-edge pixel group; (d) directing the non-edge pixel group to a spatial vertical filtering and subsequently to a temporal filtering; and (e) directing the yet to be outputted pixels to a spatial horizontal filtering and subsequently outputting the same. Also disclosed are a device, an integrated circuit and an encoder for filtering video noise. | 2008-10-23 |
20080260041 | Advance macro-block entropy coding for advanced video standards - A method and a computer-readable medium containing computer program for encoding a frame of video data are presented. The frame of video data has a plurality of macro-blocks. Each of the macro-blocks includes a macro-block header having multiple elements and macro-block residue data. An element of the macro-block header is encoded based on the value of the same element of a previous macro-block header so as to reduce overall bits in the macro-block header. The element of the macro-block header is encoded by grouping the elements of the plurality of the macro-blocks. | 2008-10-23 |
20080260042 | METHODS AND SYSTEMS FOR QUALITY CONTROLLED ENCODING - This disclosure describes techniques for controlling a perceived quality of multimedia sequences to try to achieve a desired constant perceptual quality regardless of the content of the sequences. In particular, an encoding device may implement quality control techniques to associate a sequence segment with a content “class” based on the content of the segment, determine a perceptual quality metric of the sequence segment, and adjust at least one encoding parameter used to encode the segment is encoded such that for the perceptual quality of the sequence segment converges to the desired quality. | 2008-10-23 |
20080260043 | Device and method for coding a sequence of images in scalable format and corresponding decoding device and method - The invention relates to a method for coding an image data macroblock of a sequence of images presented in the form of a base layer and at least one enhancement layer. The image data macroblock to which corresponds an image data block in the base layer, called a corresponding block, belongs to the enhancement layer. The method comprises the following steps:
| 2008-10-23 |
20080260044 | FFT-BASED MULTICHANNEL VIDEO RECEIVER - A multichannel video receiver having an analog-to-digital converter, fast-Fourier transform circuit and inverse-Fourier transform circuit. The analog-to-digital converter circuit generates a digitized representation of a frequency band used to convey a plurality of video signals, and the fast-Fourier transform circuit generates a frequency-domain representation of the digitized representation of the frequency band. The inverse-Fourier transform circuit recovers, from the frequency-domain representation, a plurality of digitized time-domain signals that correspond to the plurality of video signals. | 2008-10-23 |
20080260045 | Signalling and Extraction in Compressed Video of Pictures Belonging to Interdependency Tiers - In one embodiment, a method comprises providing a video stream, and providing information identifying compressed pictures in the video stream corresponding to respective picture interdependency tiers. | 2008-10-23 |
20080260046 | Coding/Decoding Method and Apparatus For Improviding Video Error Concealment - A coding/decoding method and an apparatus for improving video error concealment are provided, wherein the coding method comprises obtaining the relevant information of a mostly matching area for an area, wherein both the mostly matching area and the area are located in the same picture; and coding the relevant information of the mostly matching area into a coded video stream comprising the area. With the error concealment of the present invention, only several bits are required to be added when coding, whereby the whole picture appears more natural during decoding and error concealment, and the picture quality is also significantly enhanced. | 2008-10-23 |
20080260047 | FEEDBACK BASED SCALABLE VIDEO CODING - A system and method provides a first integrity check code that can be calculated at an encoder and then sent to a decoder as a supplemental enhancement information message. The decoder can then calculate a second integrity check code over the actual received network abstraction layer units. This second integrity check code can be compared with the encoder-generated first integrity check code sent via the supplemental enhancement information message to indicate if in fact all of the transmitted NAL units from which the integrity check code was generated have been received without changes in their content. In addition, an error tracking algorithm is provided that can be run at either the encoder or the decoder in order to determine if the network abstraction layer units are correct in content at the decoder level. Therefore, pictures that are sent as just intra coded frames and pictures that are sent as just inter coded frames can both be checked for errors. Hence, error checking can be provided in those situations where the decoder fails to provide adequate information to the encoder as to what has actually been decoded. | 2008-10-23 |
20080260048 | Transcoder and Method of Transcoding Therefore - A transcoder comprises a receiver ( | 2008-10-23 |
20080260049 | SERIALIZER AND DESERIALIZER - A system and method of transmitting and receiving bit serial information is disclosed. In a differential embodiment, serial bits are transmitted by a pair of line-matched differential drivers that are ac coupled to a two-conductor transmission line. A receiver is ac coupled to the line and receives the transmitted serial information via a high pass filter. The receiver includes a level-triggered latch that provides a threshold for receiving the serial information, changes state to reflect the received information, and then clamps the received information to the state of the latch. In a single-ended embodiment, the ac-coupled receiver receives the bit serial information via a high pass filter. The resistance for the filter is an active device that also provides a voltage threshold for the receiver. The received bit serial information changes the state of a device which then alters the threshold, via hysteresis, for the net bit of serial information. | 2008-10-23 |
20080260050 | ON CHIP TRANSFORMER ISOLATOR - An integrated circuit having voltage isolation capabilities includes a first area of the integrated circuit containing functional circuitry that is located in the substrate of the integrated circuit. A second area of the integrated circuit contains an integrated RF isolation circuitry for voltage isolating the functional circuitry. The RF isolation circuitry is located in the metal layers of the integrated circuit. | 2008-10-23 |
20080260051 | Method and apparatus for transmitting information simultaneously to multiple destinations over shared wireless resources - In a method for transmitting data, data intended for each user in a set of users is simultaneously transmitted on a plurality of spatial using common time and frequency resources during a first transmission time interval. At a user, a data stream transmitted is received on a plurality of spatial channels, wherein the plurality of spatial channels share common time and frequency resources during a given transmission interval. | 2008-10-23 |
20080260052 | Ofdm Reception Apparatus and Ofdm Reception Method - A degree of an influence of interference on an OFDM received signal is estimated with high precision even under various interference conditions. An OFDM reception apparatus for receiving and demodulating an OFDM signal is provided, comprising a fast Fourier transform section for converting a received OFDM signal into a frequency-domain OFDM signal, a channel response calculation section for obtaining a channel response with respect to a carrier transmitting a pilot signal, from the frequency-domain OFDM signal, an interpolation section for interpolating the channel response, and outputting the result, a power calculation section for calculating the square of a magnitude of the interpolated channel response, as a carrier power, for each carrier corresponding to the channel response, an interference calculation section for calculating a degree of an influence of interference on the received OFDM signal, as an interference power, for each carrier corresponding to the interpolated channel response, and a carrier quality calculation section for calculating a ratio of the carrier power obtained to the interference power corresponding thereto, for each carrier. | 2008-10-23 |
20080260053 | Apparatus and method for transmitting and receiving data using space-time block coding - An STFBC coding apparatus for a transmitter with four Tx antennas is provided. In the transmitter, an encoder generates a code symbol vector by encoding an input symbol sequence in a predetermined coding method. A grouping block permutes the elements of the code symbol vector by multiplying the code symbol vector by a permutation antenna grouping pattern selected among predetermined permutation antenna grouping patterns according to a predetermined order and outputs the permuted code symbol vector as a grouping symbol vector. OFDM (Orthogonal Frequency Division Multiplexing) modulators OFDM modulate the grouping symbol vectors and transmit OFDM modulated symbols through the four transmit antennas. | 2008-10-23 |
20080260054 | METHOD AND APPARATUS FOR REDUCING A PEAK-TO-AVERAGE POWER RATIO IN A MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM - A method and apparatus for reducing a peak-to-average power ratio (PAPR) in a multiple-input multiple-output (MIMO) wireless communication system are disclosed. Transmit beamforming or precoding is performed on transmit symbols based on a channel matrix. For feedback, channel matrices may be averaged over multiple subcarriers and the averaged channel matrices may be further quantized. In order to reduce the PAPR, amplitude clipping may be performed on the symbols after the transmit processing. The amplitude clipping may be performed by hard clipping, soft clipping, or smooth clipping. | 2008-10-23 |
20080260055 | Apparatus for Creating, Demodulating, Transmitting and Receiving Othorgonal Frequency Division Multiplexing Symbol - The present invention relates to an orthogonal frequency division multiplexing (OFDM) signal transmitting and receiving device, in which a peak to average power ratio characteristic is improved without reducing a data D transmission speed. The OFDM signal transmitting device separates a digital modulated symbol as a real part and an imaginary part, and performs discrete cosine transform (DCT) and discrete sine transform (DST) operations respectively for real and imaginary part symbols, performs an inverse fast Fourier transform operation, and generates an OFDM symbol. The OFDM signal receiving device performs a fast Fourier transform operation for the OFDM symbol, and performs an inverse DCT operation and an inverse DST operation, performs a digital demodulating operation, and generates a final binary data symbol. | 2008-10-23 |
20080260056 | Methods for Selecting a Coarse Frequency Offset Estimation for an Orthogonal Frequency Division Multiplexing Modulated Signal - The present invention provides methods for selecting the coarse frequency offset estimation in an orthogonal frequency division multiplexing system that may include: searching within a predefined subset for a set of frequency offset candidates; selectively searching outside the predefined subset for additional frequency offset candidates; and combining one or more ICDC method and CIR based method to select the coarse frequency offset. | 2008-10-23 |
20080260057 | METHOD AND APPARATUS FOR GENERATING TRAINING SEQUENCE CODES IN A COMMUNICATION SYSTEM - A method for generating a training sequence code (TSC) in a communication system. The method includes obtaining a full set of training sequence code candidates through joint channel estimation with consideration of a symbol delay of an interfering signal; optimizing cross-correlation properties for the full set; obtaining a subset for necessary training sequence codes among the training sequence code candidates; defining each of training sequence codes in the obtained subset as a reference sequence; and generating optimized training sequence codes by copying symbols of a predetermined number of bits located in the front of the reference sequence, arranging the copied symbols in Most Significant Positions (MSPs) as a guard sequence, copying symbols of a predetermined number of bits located in the rear of the reference sequence, and arranging the copied symbols in Least Significant Positions (LSPs) as a guard sequence. | 2008-10-23 |
20080260058 | METHOD AND APPARATUS FOR PRECODING VALIDATION IN WIRELESS COMMUNICATIONS - A method and apparatus for precoding validation in wireless communications with reduced error probability is disclosed. Error probability is reduced by applying phase rotations to precoding matrices, dedicated pilot symbols, or both to maximize a minimum pairwise distance. | 2008-10-23 |
20080260059 | METHOD AND APPARATUS FOR EFFICIENT PRECODING INFORMATION VALIDATION FOR MIMO COMMUNICATIONS - A method and apparatus for efficient precoding matrix verification in a multiple-input multiple-output MIMO wireless communication system are disclosed. A wireless transmit/receive unit WTRU sends a precoding matrix index PMI to an eNodeB. The eNodeB sends a verification message including a PMI indicator indicating whether or not the PMI of the WTRU and a PMI of the eNodeB are identical. If the PMI of the WTRU and of the eNodeB are identical, the eNodeB sends just a PMI indicator otherwise the eNodeB sends to the WTRU a PMI indicator and the PMI of the eNodeB. A plurality of PMIs may be sent simultaneously, and the PMIs may be partitioned into a plurality of groups. The PMI indicator may be either attached to or inserted into control signaling. PMI validation messages can be signaled to WTRU by control signaling or use of a dedicated reference signal. | 2008-10-23 |
20080260060 | METHOD OF CONTROLLING SIGNAL TRANSMISSION IN MULTI-INPUT/MULTI-OUTPUT SYSTEM - A method of controlling signal transmission in a Multiple Input Multiple Output (MIMO) communication system including selecting a modulation and code set (MCS) for each of M data streams transmitted via M transmitting antennas in a transmitting side of the MIMO system, and selectively selecting M−1 or fewer transmitting antennas from the M transmitting antennas for transmitting the data streams based on channel quality information indicative of a transmission performance of the selected MCS corresponding to each of the M transmitting antennas. In another example, the present invention provides a novel method of controlling signal transmission in a MIMO communication system including selecting M weight vectors for streams transmitted by each of M transmitting antennas in a transmitting side of the MIMO system, and selectively selecting M−1 or fewer streams and weight vectors from the M weight vectors for transmitting data streams based on channel quality information indicative of transmission performance of the selected weight vectors corresponding to each of the M vector spaces. | 2008-10-23 |
20080260061 | Method for the Coding of an Ofdm/Oqam Signal Using Symbols with Complex Values, and Corresponding Signal, Devices and Computer Programs - A method and apparatus are provided for coding an OFDM/OQAM-type multi-carrier signal formed by a temporal succession of symbols comprising a set of data elements. Each of the data elements modulates a carrier frequency of the signal. Each of the data elements is formed by adding two real values in quadrature, which each correspond to a binary word of a source signal, which is modulated using a pre-determined modulation constellation, such as to transmit information over a real channel and an imaginary channel of the OFDM/OQAM symbols. | 2008-10-23 |
20080260062 | METHOD AND SYSTEM FOR OPTIMIZED REFERENCE SIGNAL DOWNLINK TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM - A method and system optimizes the transmission of a downlink reference signal (DLRS) in a wireless communication system that uses orthogonal division multiple access (OFDMA) for the downlink. Each Node-B (base station) is capable of transmitting the DLRS reference symbols in different subframes of the OFDM radio frame and changing both the number and location of the subframes in response to changing network conditions. The network conditions include the number of terminals being served by the Node-B and multiple access interference (MAI) from adjacent Node-Bs. | 2008-10-23 |
20080260063 | Sequence generating method - This invention provides a sequence generating method, in which the method has steps of generating R sets of orthogonal sequence with each set of the orthogonal sequence including N elements, generating a low-autocorrelation sequence having N elements, and multiplying the N elements of the low-autocorrelation sequence by the N elements of each of R sets of the orthogonal sequence point-to-point. Therefore, a sequence generated by the method of the present invention has low-autocorrelation and low-crosscorrelation in transmission characteristics of a communication system. | 2008-10-23 |
20080260064 | Cooperative MIMO in Multicell wireless networks - A method and system for cooperative multiple-input multiple output (MIMO) transmission operations in a multicell wireless network. Under the method, antenna elements from two or more base stations are used to from an augmented MIMO antenna array that is used to transmit and receive MIMO transmissions to and from one or more terminals. The cooperative MIMO transmission scheme supports higher dimension space-time-frequency processing for increased capacity and system performance. | 2008-10-23 |
20080260065 | METHOD AND SYSTEM FOR MODULATING AND DEMODULATING SIGNALS IN ULTRA-WIDE BAND (UWB) COMMUNICATION SYSTEMS - A communication system is disclosed and it may include one or more first circuits in a first passband single carrier transmitter coupled to a first ultra-wide-band wireless transmission channel. The communication system may also include one or more second circuits in a first receiver coupled to the first ultra-wide-band wireless transmission channel. The one or more second circuits may enable receiving of signals transmitted by the one or more first circuits over the first ultra-wide-band wireless transmission channel at a baud rate less than or equal to half of a spectral bandwidth of the signal transmitted by the one or more first circuits. The one or more first circuits and the one or more second circuits coupled to the first ultra-wide-band wireless transmission channel may be a first piconet. | 2008-10-23 |
20080260066 | Dynamic digital pre-distortion system - A Dynamic Digital Pre-Distortion (DDPD) system is disclosed to rapidly correct power amplifier (PA) non-linearity and memory effects. To perform pre-distortion, a DDPD engine predistorts an input signal in order to cancel PA nonlinearities as the signal is amplified by the PA. The DDPD engine is implemented as a composite of one linear filter and N-1 high order term linear filters. The bank of linear filters have programmable complex coefficients. To compute the coefficients, samples from the transmit path and a feedback path are captured, and covariance matrices A and B are computed using optimized hardware. After the covariance matrices are computed, Gaussian elimination processing may be employed to compute the coefficients. Mathematical and hardware optimizations may be employed to simplify and reduce the number of multiplication operands and other operations, which can enable the DDPD system to fit within a single chip. | 2008-10-23 |
20080260067 | Bit Reliability Equalization by Modulation Switching for Harq - A method is disclosed for digital data transmission using higher order modulation schemes, wherein a plurality of bits is mapped to bit positions of a symbol and the transmission has different error probabilities for at least two out of said bit positions. A data bit is mapped to a bit position in a first modulation scheme and transmitted in a symbol on the mapped bit position of the first modulation scheme. When a request is received from a receiver, for retransmission of a data block containing this data bit, a decision is made about a re-transmission of said bit, based on a reliability of the bit position in the first transmission, and if it is decided to retransmit the bit, the data bit is mapped to a bit position of a second modulation scheme and retransmitted in a symbol on the mapped bit position of the second modulation scheme. | 2008-10-23 |
20080260068 | Method and System of Diversity Transmission of Data | 2008-10-23 |
20080260069 | APPARATUS AND METHOD FOR DIGITAL WIRELESS COMMUNICATION - In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established. | 2008-10-23 |
20080260070 | Method for Transmitting a Digital Signal, Method for Receiving a Digital Signal, Transmitter and Receiver - A transmitter ( | 2008-10-23 |
20080260071 | Methods and Apparatus for Frequency Synthesis with Feedback Interpolation - A frequency synthesis circuit includes a phase locked loop and an interpolator circuit. The phase locked loop circuit receives a reference clock and a feedback clock and generates an output clock with a frequency based on the reference clock and the feedback clock. An interpolator circuit is coupled in the feedback path of the phase locked loop circuit. An interpolator control circuit generates an interpolator control word that specifies a variable time delay for the interpolator circuit. The interpolator circuit receives the output clock, and generates the feedback clock by introducing a variable time delay in the output clock in accordance with the interpolator control word. The time variable delay varies the frequency of the output circuit. Embodiments for frequency synthesis circuits that include a spread spectrum frequency clock generator, frequency modulators, and a fixed frequency clock generator circuit are disclosed. | 2008-10-23 |
20080260072 | APPARATUS FOR RECEIVING AND RECOVERING FREQUENCY SHIFT KEYED SYMBOLS - A receiver architecture for receiving an FSK signal having a predetermined number of modulation levels includes a selectivity filter ( | 2008-10-23 |
20080260073 | Ecoding and decoding methods and apparatus for use in a wireless communication system - The claimed subject matter relates to encoding and decoding information in a wireless communication system using soft-demodulation and interleaving of concatenated code received in a strip channel. A set of symbols is received containing a plurality of information bits, dividing the received set of symbols into a plurality of subsets of symbols, each subset corresponding to the input of an inner code demodulation selecting a set of initial a priori values of the inner code demodulation for each subset of symbols, and demodulating each subset of symbols, using the initial a priori values of the subset of symbols and an inner code generator matrix, to generate a plurality of first soft information values as the output of the inner code demodulation. Each of the first soft information values is associated to one of the plurality of information bits using an outer code generator matrix, calculating a plurality of second soft information values as the output of the outer code demodulation, wherein each second soft information value corresponds to one of the information bits and is calculated using at least two of the first soft information values associated with the information bit, determining a new set of a priori values of the inner code demodulation for each subset of symbols, using the second soft information values and the outer code generator matrix, and replacing the initial a priori values with the new a priori values, and repeating the demodulating, associating, calculating and determining actions at least once. | 2008-10-23 |
20080260074 | Symbol Analyzing Device, Symbol Analyzing Method, and Information Storage Medium - To provide a symbol analyzing device capable of carrying out post hoc analysis of the meaning of a symbol used in communications. The symbol analyzing device comprises a symbol acquiring section ( | 2008-10-23 |
20080260075 | SYSTEMS AND METHODS FOR LOW-COMPLEXITY MAX-LOG MIMO DETECTION - Embodiments provide novel systems and methods for multiple-input multiple-output (MIMO) Max-Log detection. These systems and methods enable near-optimal performance with low complexity for a two-input two-output channel. Some embodiments comprise using a Max-Log detector to compute a set of log-likelihood ratio (LLR) values for a channel input by minimizing cost function while computing only one instance of the cost function for each value of each bit in a symbol. Other embodiments comprise using a Max-Log detector to compute a set of log-likelihood ratio (LLR) values for a channel input by computing all instances of a cost function for each value of each bit in a symbol and selecting the minimum cost from all computed instances of the cost function for each value of each bit. | 2008-10-23 |
20080260076 | CARRIER FREQUENCY OFFSET ESTIMATION METHOD AND SYSTEM - In one aspect of the invention, a carrier frequency offset (CFO) estimation method to estimate a CFO value of a received signal is provided, and the method comprises: receiving a preamble signal which includes several non-perfect repeat segments; applying an interpolation procedure to interpolate the perfect repeat point of one segment compared with the next segment or the previous segment; acquiring a delay correlation value based on the two perfect repeat signal segments and estimating the CFO value based on the delay correlation value. | 2008-10-23 |
20080260077 | Method and Apparatus for Recognizing a Disturbing Effect in an Information Channel - In order to recognize a distorting effect in a serial communication channel, a set of different symbol vectors formed of n>=2 successive communication symbols and a set of reference values of a critical characteristic of the i-th communication symbol ( | 2008-10-23 |
20080260078 | Iterative Reception of a Multi-Carrier Signal With Interference Cancellation - A method is provided for the reception of a data signal comprising multiple carriers, known as a multi-carrier signal, which undergoes channel coding at transmission, said method employing an estimation of the received signal. One such reception method comprises at least one iteration for improving the estimation of the received signal, as a function of the received signal and of an estimation preceding from said received signal. One such iteration comprises, for each of the carriers of the received signal, a step involving the equalisation of the carrier with the cancellation of an interference affecting the received signal as a function of at least one statistical parameter of the estimation preceding from said received signal. | 2008-10-23 |
20080260079 | RECEPTION SYSTEM HAVING A SWITCHING ARRANGEMENT FOR SUPPRESSING CHANGE-OVER INTERFERENCE IN THE CASE OF ANTENNA DIVERSITY - A diversity processing system for providing interference masking signals in an interference suppression circuit. These interference masking signals are generated by an interference detector which through a coupling element couples in a signature signal into a reception signal. This reception signal is then passed to an amplifier, an optional frequency converter, an IF filter, a frequency demodulator and then on to an interference suppression circuit which provides a masking pulse to mask any distortion or interference associated with the diversity switching of antennas during operation. | 2008-10-23 |
20080260080 | Narrowband Interference Cancellation Method and Apparatus - A Cartesian Feedback-loop Signal Canceller (CFSC) recovers a signal of interest from a composite signal by cancelling a narrowband interferer from the composite signal. According to one embodiment, narrowband interference cancellation is performed by destructively combining a composite signal including a narrowband interference signal and a signal of interest with an estimate of the narrowband interference signal to generate an interference-compensated signal. A feedback signal is generated having Cartesian components derived from the interference-compensated signal. Cartesian components associated with the signal of interest are removed from the feedback signal to generate the narrowband interference signal estimate. | 2008-10-23 |
20080260081 | Real-time channel estimation system - A real-time channel estimation system, which receives a wireless transmission signal through a wireless channel and estimates channel parameters of the wireless channel in real-time. The system includes a channel estimator to receive the wireless transmission signal and output the channel parameters; first and second filters to filter the channel parameters for producing a first and a second sets of filtered channel parameters; first and second calculators to compute according to the first and the second sets of filtered channel parameters and the wireless transmission signal for producing a first and a second probabilities; a comparator to compare the first and the second probabilities for producing an indicative signal; and a multiplexer to receive the indicative signal for accordingly selecting the first or second set of filtered channel parameters as an output. | 2008-10-23 |