Patent application number | Description | Published |
20090028239 | MOVING PICTURE ENCODING METHOD, MOVING PICTURE DECODING METHOD AND APPARATUSES USING THE METHODS - The moving picture encoding method of the present invention is for orthogonally transforming pixels which constitute a block into coefficients indicating frequencies, quantizing the coefficients, and encoding the quantized coefficients. The method includes: selecting quantized coefficients belonging to a subset of a block, from the block of frequency coefficients which are either the coefficients prior to quantization or the quantized coefficients; and altering the arrangement of the subset in the block. Here, the arrangement of the subset is altered in relation to at least one of the following (i) to (v): (i) the completion of encoding a picture; (ii) the completion of encoding a predetermined number of blocks; (iii) content of a current picture to be encoded; (iv) the position of a block in a picture; and (v) a comparison between each frequency coefficient and a threshold. | 01-29-2009 |
20090122864 | MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING METHOD, AND APPARATUSES OF THE SAME - A moving picture coding method according to the present invention is a moving picture coding method for coding a moving picture which includes pictures, the method including: partitioning a picture into blocks each of which includes pixels; selecting a scanning scheme from among plural scanning schemes; scanning the blocks according to the selected scanning scheme; and coding the blocks in an order in which the blocks are scanned. In doing so, in the partitioning, the picture is partitioned into rows and columns of macroblocks each of which is partitioned into the blocks. The plural scanning schemes include a first scanning scheme for scanning the blocks in the macroblock per row of blocks. | 05-14-2009 |
20090257491 | MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND STREAM DATA - A signal separation unit ( | 10-15-2009 |
20090274380 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, PROGRAM AND SEMICONDUCTOR INTEGRATED CIRCUIT - An image processing apparatus according to the present invention includes a filter unit which filters image signals; a sampling unit which generates first digital image signals having a first resolution by sampling the filtered image signals at a predetermined sampling frequency; and a super-resolution unit which reconstructs a second digital image signal having a second resolution which is higher than the first resolution by performing super-resolution on the first digital image signals generated by the sampling unit, wherein the filter unit passes frequency components corresponding to or lower than the Nyquist frequency which is half the sampling frequency, and passes a part of frequency components within a range from the Nyquist frequency to the highest frequency which can be represented by the second resolution. | 11-05-2009 |
20100014763 | IMAGE CODING APPARATUS AND IMAGE DECODING APPARATUS - Provide is an image decoding apparatus which reliably prevents deterioration of the image quality of decoded images which have been previously coded. An image decoding apparatus ( | 01-21-2010 |
20100021071 | IMAGE CODING APPARATUS AND IMAGE DECODING APPARATUS - The present invention provides an image coding apparatus and an image decoding apparatus capable of enhancing the image quality of decoded image data. | 01-28-2010 |
20100046845 | IMAGE CODING APPARATUS AND IMAGE DECODING APPARATUS - The present invention has been conceived to solve the previously described problems, and provides a texture representation method without any unnatural feeling while performing data compression equivalent to a conventional data compression or more. An input signal is separated in two frequency domains. The low-frequency component is faithfully coded by a conventional image/video coding apparatus. The high-frequency component is analyzed to compute representative texture parameters. Instead of faithfully coding the high-frequency component, only the computed texture parameters are stored or transmitted to a decoding apparatus. Then, the low-frequency component is reconstructed, whereas the high-frequency component is replaced by a natural texture that has been synthesized according to the texture parameters. The reconstructed low-frequency component and the synthesized high-frequency component are merged to generate an output signal. | 02-25-2010 |
20100067574 | VIDEO DECODING METHOD AND VIDEO ENCODING METHOD - The present invention prevents coding artifacts caused in applying image enhancement technologies to pictures that have been encoded and then decoded. A video decoder ( | 03-18-2010 |
20100128995 | IMAGE CODING METHOD AND IMAGE DECODING METHOD - Provided is an image coding method for performing intra prediction achieving higher coding efficiency. The method for coding image data on a block-by-block basis includes: generating a predicted block by predicting a current block; computing a difference between the current block and the predicted block; coding the difference computed in the computing; decoding the difference coded in the coding; and adding the difference decoded in the decoding to the predicted block to generate a decoded block, wherein the generating includes: detecting an edge in a previously decoded block corresponding to a block adjacent to the current block; and extrapolating or interpolating previously decoded image data corresponding to a pixel included in the block adjacent to the current block, along a direction of the edge detected in the detecting to generate the predicted block. | 05-27-2010 |
20100135398 | METHOD FOR DETERMINING FILTER COEFFICIENT OF TWO-DIMENSIONAL ADAPTIVE INTERPOLATION FILTER - A method for efficiently determining an appropriate filter coefficient of a two-dimensional adaptive interpolation filter with less calculation, the method including: a motion estimating step (S | 06-03-2010 |
20100177973 | STATISTICAL IMAGE ENHANCING METHOD, IMAGE CODING METHOD, AND IMAGE DECODING METHOD - The present invention relates to processing an image by using a statistical property of a reference image. An image enhancing apparatus according to the present invention includes: a first image processing unit ( | 07-15-2010 |
20100208989 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, PROGRAM AND INTEGRATED CIRCUIT - An image coding method includes transforming a color space of a color image from a first color space to a second color space to generate a color space transformed color image (S | 08-19-2010 |
20100220788 | VIDEO CODING METHOD AND VIDEO DECODING METHOD - A video coding method and a video coding device can optimize prediction efficiency and coding efficiency. | 09-02-2010 |
20100254450 | VIDEO CODING METHOD, VIDEO DECODING METHOD, VIDEO CODING APPARATUS, VIDEO DECODING APPARATUS, AND CORRESPONDING PROGRAM AND INTEGRATED CIRCUIT - A video coding method according to the present invention is for coding a signal to be coded which represents a video, and includes: generating a prediction signal predictive of the signal to be coded, based on a coded signal coded prior to the coding of the signal to be coded (S | 10-07-2010 |
20110103467 | Encoding and Decoding of Video Images Based on a Non-linear Quantization - The present invention enables to adaptively shape the quantization intervals according to a non-linear quantization curve for encoding video data in order to better adapt the quantization process to film grain information without increasing the resulting bit rate while maintaining the coding efficiency. | 05-05-2011 |
20110206135 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, INTEGRATED CIRCUIT AND PROGRAM - Images are coded with higher efficiency while maintaining the same image quality. An image coding method of coding an image on a block basis, including: transforming (S | 08-25-2011 |
20110305388 | IMAGE PROCESSING METHOD, AND IMAGE PROCESSING DEVICE - The image processing device includes: a specular reflection detector ( | 12-15-2011 |
20120027083 | VIDEO CODING METHOD, VIDEO DECODING METHOD, VIDEO CODING APPARATUS, AND VIDEO DECODING APPARATUS - A video coding method which enables reduction in the decrease in the efficiency of coding a video and enhancement of the image quality of the resulting decoded video involves: predicting a video signal to generate a prediction signal (S | 02-02-2012 |
20120189217 | IMAGE CODING APPARATUS AND IMAGE DECODING APPARATUS - Provide is an image decoding apparatus which reliably prevents deterioration of the image quality of decoded images which have been previously coded. An image decoding apparatus ( | 07-26-2012 |
20120213277 | MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND STREAM DATA - A signal separation unit ( | 08-23-2012 |
20120307896 | MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING METHOD, AND APPARATUSES OF THE SAME - A moving picture coding method includes partitioning a picture into blocks each of which includes pixels, selecting a scanning scheme from among plural scanning schemes, scanning the blocks according to the selected scanning scheme, and coding the blocks in an order in which the blocks are scanned. In the partitioning, the picture is partitioned into rows and columns of macroblocks each of which is partitioned into the blocks. The plural scanning schemes include a first scanning scheme for scanning the blocks in the macroblock per row of blocks. | 12-06-2012 |
20130094582 | VIDEO CODING METHOD AND VIDEO DECODING METHOD - A video coding device codes video data, by performing motion compensation with sub-pel resolution by using an adaptive interpolation filter for calculating a pixel value of a sub pixel for interpolation between full pixels configuring an input image included in the video data. The video coding device includes a motion compensation unit setting a filter property for an adaptive interpolation filter on a predetermined process unit basis, determining, for each of sub-pel positions relative to a full pixel, a plurality of filter coefficients of the adaptive interpolation filter having the set filter property, and performing the motion compensation with sub-pel resolution, by applying the adaptive interpolation filter having the determined filter coefficients to the input image. The video coding device includes a subtraction unit generating a prediction error, by subtracting, from the input image, a prediction image generated in the motion compensation, and a coding unit coding the prediction error. | 04-18-2013 |
20130101027 | DEBLOCKING CONTROL BY INDIVIDUAL QUANTIZATION PARAMETERS - The present invention relates to deblocking filtering, which may be advantageously applied for block-wise encoding and decoding of image or video signal. In particular, the present invention relates to automated decision on whether to apply or skip deblocking filtering for a block and to selection of the deblocking filter. The decision and/or selection is performed for predefined individual pixels based on the amount of quantization of the block the boundary of which is to be deblocked and on the amount of quantization of its neighboring block adjacent to the boundary, as well as on the position of the individual pixels. | 04-25-2013 |
20130101032 | FILTERING MODE FOR INTRA PREDICTION INFERRED FROM STATISTICS OF SURROUNDING BLOCKS - The present invention relates to intra prediction which may be performed during encoding and/or decoding of an image signal. In particular, the present invention relates to intra prediction of a current block, during which filtering is applied to the prediction signal and/or to signal used for the prediction. The filtering is applied in accordance with a decision based on characteristics of image signal included in block(s) spatially adjacent to the current block. | 04-25-2013 |
20130129236 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, PROGRAM AND SEMICONDUCTOR INTEGRATED CIRCUIT - An image processing apparatus includes a filter unit which filters image signals; a sampling unit which generates first digital image signals having a first resolution by sampling the filtered image signals at a predetermined sampling frequency; and a super-resolution unit which reconstructs a second digital image signal having a second resolution which is higher than the first resolution by performing super-resolution on the first digital image signals generated by the sampling unit, wherein the filter unit passes frequency components corresponding to or lower than the Nyquist frequency which is half the sampling frequency, and passes a part of frequency components within a range from the Nyquist frequency to the highest frequency which can be represented by the second resolution. | 05-23-2013 |
20130142267 | LINE MEMORY REDUCTION FOR VIDEO CODING AND DECODING - The present invention relates to filtering of image data at first with a deblocking and then with an adaptive loop filter, suitable for the purpose of video coding and decoding. In order to reduce requirements to a memory on chip, used to buffer image lines necessary for filtering, the input signal for the adaptive loop filter is determined from among deblocked pixels, non-deblocked pixels and partially (horizontally only or vertically only) deblocked pixels. The adaptive loop filtering of a deblocked pixel may then apply the filter taps to already deblocked pixels and/or undeblocked pixels and/or partially deblocked pixels in accordance with the determination of the input signal. An advantage of the invention is reduction of the line memory necessary especially at the decoder for processing with both filters. | 06-06-2013 |
20130182764 | IMAGE PROCESSING METHOD AND IMAGE PROCESSING APPARATUS - An image processing method of performing filtering on image blocks using a plurality of deblocking filters having different filter strengths includes: a first parameter calculating step of calculating a first parameter indicating a boundary strength; a second parameter calculating step of calculating a second parameter indicating a limit value for each of the deblocking filters, based on the first parameter and a quantization parameter; and a selecting step of selecting a deblocking filter to be used in the filtering from among the deblocking filters, using one or more threshold values which are determined based on the second parameter. | 07-18-2013 |
20130251039 | IMAGE CODING METHOD AND IMAGE DECODING METHOD - Provided is an image coding method for performing intra prediction achieving higher coding efficiency. The method for coding image data on a block-by-block basis includes; generating a predicted block by predicting a current block; computing a difference between the current block and the predicted block; coding the difference computed in the computing; decoding the difference coded in the coding; and adding the difference decoded in the decoding to the predicted block to generate a decoded block, wherein the generating includes: detecting an edge in a previously decoded block corresponding to a block adjacent to the current block; and extrapolating or interpolating previously decoded image data corresponding to a pixel included in the block adjacent to the current block, along a direction of the edge detected in the detecting to generate the predicted block. | 09-26-2013 |
20130322548 | EFFICIENT DECISIONS FOR DEBLOCKING - The present invention relates to deblocking filtering, which may be advantageously applied for block-wise encoding and decoding of image or video signal. In particular, the present invention relates to performing an efficient and accurate decision on whether or not to apply deblocking filtering on an image block. The efficient and accurate decision is achieved by performing individual decisions on whether or not to apply deblocking filtering for segments of a boundary between adjacent image blocks, wherein the individual decision are based on pixels comprised in a subset of the pixel lines that the image blocks are composed of. | 12-05-2013 |
20130343456 | IMAGE PROCESSING METHOD AND IMAGE PROCESSING APPARATUS - An image processing method of performing filtering on image blocks using a plurality of deblocking filters having different filter strengths includes: a first parameter calculating step of calculating a first parameter indicating a boundary strength; a second parameter calculating step of calculating a second parameter indicating a limit value for each of the deblocking filters, based on the first parameter and a quantization parameter; and a selecting step of selecting a deblocking filter to be used in the filtering from among the deblocking filters, using one or more threshold values which are determined based on the second parameter. | 12-26-2013 |
20140036998 | QUANTIZATION PARAMETER FOR BLOCKS CODED IN THE PCM MODE - The present invention relates to coding of an image of a video sequence block wisely and, in particular, to coding of a block of samples, which may be chrominace or luminance samples, or samples of any colour space, by a pulse code modulation (PCM). After PCM coding, deblocking filtering may be applied. The deblocking filter may be selected for the present PCM coded block based on its noise and/or the noise of its adjacent block. The noise of the PCM coded block is indicated by a so-called PCM quantization parameter, which is also encoded in the bitstream. | 02-06-2014 |
20140056350 | SIMPLIFICATIONS FOR BOUNDARY STRENGTH DERIVATION IN DEBLOCKING - The present invention relates to an advantageous scheme for boundary strength derivation and decision processing related to deblocking filtering. More particularly, the present invention improves schemes for deciding deblocking and selecting appropriate deblocking filters known in the art so as to reduce the number of calculation cycles and required memory space. | 02-27-2014 |
20140086305 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image decoding method for decoding a bitstream including a coded signal resulting from coding tiles and slices into which an image is partitioned, the method including decoding the coded signal, wherein each of the slices is either a normal slice having, in a header, information used for an other slice or a dependent slice which is decoded using information included in a slice header of another slice, and when the normal slice starts from a position other than a beginning of a first tile, a second tile coded next to the first tile does not start from the dependent slice. | 03-27-2014 |
20140086306 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image decoding method for decoding a bitstream including a coded signal resulting from coding slices into which an image is partitioned and each of which includes coding units, includes decoding the coded signal, wherein each of the slices is either a normal slice having, in a slice header, information used for another slice or a dependent slice which is decoded using information included in a slice header of another slice, the image includes rows each of which includes coding units, and when the normal slice starts at a position other than the beginning of the first row, the second row immediately following the first row does not start with the dependent slice. | 03-27-2014 |
20140093180 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - A dependency indication is signaled within the beginning of a packet, that is, within the adjacent of a slice header to be parsed or a parameter set. This is achieved, for example, by including the dependency indication at the beginning of the slice header, preferably after a syntax element identifying the parameter set and before the slice address, by including the dependency indication before the slice address, by providing the dependency indication to a NALU header using a separate message, or by using a special NALU type for NALUs carrying dependent slices. | 04-03-2014 |
20140153636 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image decoding method includes: obtaining a boundary control flag for jointly controlling a deblocking filter operation and a sample adaptive offset operation for a slice boundary of a current slice to be decoded included in a coded picture; decoding the current slice; performing the deblocking filter operation based on the boundary control flag only on at least one of a top slice boundary or a left slice boundary among all slice boundaries of the current slice that has been decoded; and performing the sample adaptive offset operation dependent on the boundary control flag only on the at least one of the top slice boundary or the left slice boundary among all the slice boundaries of the current slice that has been decoded. | 06-05-2014 |