Patent application number | Description | Published |
20130114709 | IMAGE CODING APPARATUS, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND STORAGE MEDIUM - An image coding apparatus includes a quantization matrix coding unit configured to code quantization matrices, wherein the quantization matrix coding unit is configured to code a difference between a coefficient to be coded and a coefficient adjacent to the coefficient to be coded, and to use, when coding the difference having a positive value, a coding table that uses a code of a bit number equal to or less than that of a code used to code the difference having a negative value having the same absolute value as the absolute value of the positive value. | 05-09-2013 |
20130114724 | IMAGE ENCODING METHOD, IMAGE ENCODING APPARATUS, AND RELATED ENCODING MEDIUM, IMAGE DECODING METHOD, IMAGE DECODING APPARATUS, AND RELATED DECODING MEDIUM - The invention is directed to a technique capable of improving an coding efficiency by setting a quantization parameter of a peripheral block that is strongly correlated with a quantization parameter of an encoding target block as a prediction value. | 05-09-2013 |
20130129240 | IMAGE CODING APPARATUS, METHOD FOR CODING IMAGE, AND PROGRAM, AND IMAGE DECODING APPARATUS, METHOD FOR DECODING IMAGE, AND PROGRAM - An image processing apparatus according to the present invention includes an image coding apparatus including a first encoding unit configured to be input with an image having a first resolution, and, on a block basis, perform prediction of a block subjected to coding based on coded pixels to code the image and generate first prediction information indicating a prediction method; a scaling unit configured to scale a first image output from the first coding unit based on a ratio of the first resolution to a second resolution larger than the first resolution, by using a filter determined by the first prediction information, to generate inter-layer pixel prediction reference data; and a second coding unit configured to be input with an image having the second resolution, and, on a block basis, perform prediction based on coded pixels or the inter-layer pixel prediction reference data to code the image. | 05-23-2013 |
20130266235 | IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD, IMAGE ENCODING PROGRAM, IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND IMAGE DECODING PROGRAM - An image encoding method for encoding an image to generate an image bit stream, comprising encoding an image on a block-by-block basis in a first encoding mode in which a quantization is performed, encoding the image on a block-by-block basis in a second encoding mode in which a quantization is not performed, and filtering a first reproduced image and a second reproduced image generated. The filtering is controlled such that the filtering on the second reproduced image is performed based on filter control information indicating whether the second reproduced image is to be subjected to the filtering. | 10-10-2013 |
20130272388 | APPARATUS, METHOD, AND PROGRAM FOR CODING IMAGE AND APPARATUS, METHOD, AND PROGRAM FOR DECODING IMAGE - Provided is a method for coding an image to generate an image bit stream, the method including a first coding step of coding an image in units of blocks in a first coding mode in which quantization is performed; a second coding step of coding an image in units of blocks in a second coding mode in which quantization is not performed; a determination step of determining which of the first coding mode or the second coding mode is used to code the image in units of blocks; and an integrally coding step of, in the case where it is determined in the determination step that coding is performed using the second coding step, switching between the first coding step and the second coding step in units of blocks and coding information indicating that switching is performed in units of blocks as block-by-block mode-switching information. | 10-17-2013 |
20130287107 | IMAGE CODING APPARATUS, IMAGE CODING METHOD AND PROGRAM, IMAGE DECODING APPARATUS, AND IMAGE DECODING METHOD AND PROGRAM - An image coding method according to one aspect includes dividing an input image into processing target block(s), determining a mode of an intra-picture prediction of the processing target block in units of the divided processing target block(s), holding the prediction mode into a holding unit, estimating the intra prediction mode of the processing target block, comparing the result of the prediction mode determination and the result of the prediction mode estimation to determine whether they match each other, coding the result of the comparison, and further, when the result of the comparison indicates a mismatch, coding the result of the prediction mode determination. An intra prediction mode of one or more predetermined processing units surrounding the processing target block from the holding unit is acquired and compared, and the coding is controlled based on the result of the mode comparison. | 10-31-2013 |
20140133553 | APPARATUS, METHOD, AND PROGRAM FOR CODING IMAGE AND APPARATUS, METHOD, AND PROGRAM FOR DECODING IMAGE - An image processing apparatus of the present invention has the following configuration: | 05-15-2014 |
20140307782 | IMAGE CODING APPARATUS, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND STORAGE MEDIUM - An image coding apparatus includes a block dividing unit configured to divide an input image into a plurality of blocks, a prediction unit configured to perform prediction based on coded pixels to generate prediction errors, a transformation unit configured to perform orthogonal transform to the prediction errors to generate transform coefficients, a quantization matrix generation unit configured to generate quantization matrices that are used to quantize the transform coefficients, a quantization matrix coding unit configured to calculate difference values by scanning the quantization matrices and to code the difference values, a quantization unit configured to generate quantization coefficients by quantizing the generated transform coefficients using the quantization matrices, and a coefficient coding unit configured to code the quantization coefficients, wherein the quantization matrix coding unit is configured to scan coefficients of the quantization matrices in a unidirectional manner to calculate the difference value. | 10-16-2014 |
20150016539 | IMAGE CODING APPARATUS, IMAGE CODING METHOD, AND RECORDING MEDIUM, AND IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND RECORDING MEDIUM - An image coding apparatus that codes a moving image composed of a plurality of pictures, includes a determination unit configured to define a tile set in a manner that a size of the tile set including one or more tiles obtained by dividing a picture, which corresponds to a size of the tile set at which coding can be independently performed, is set to be smaller than or equal to a predetermined size, and a coding unit configured to code the picture on the basis of the tile set defined by the determination unit. | 01-15-2015 |