公开(公告)号：EP2850831A1

公开(公告)日：2015-03-25

申请号：EP13723460.5

申请日：2013-05-13

申请人： Rossato, Luca ,  Meardi, Guido

发明人： Rossato, Luca ,  Meardi, Guido

IPC分类号： H04N7/26 ,  H04N7/30 ,  H04N7/46 ,  H04N7/28

CPC分类号： H04N19/126 ,  G06T7/248 ,  H04N19/136 ,  H04N19/23 ,  H04N19/33 ,  H04N19/50 ,  H04N19/59 ,  H04N19/62 ,  H04N19/63 ,  H04N19/635 ,  H04N19/87 ,  H04N19/94

摘要： Computer processor hardware receives a first set of adjustment values. The first set of adjustment values specify adjustments to be made to a predicted rendition of a signal generated at a first level of quality to reconstruct a rendition of the signal at the first level of quality. The computer processor hardware processes the first set of adjustment values and derives a second set of adjustment values based on the first set of adjustment values and a rendition of the signal at a second level of quality. The second level of quality is lower than the first level of quality.

摘要翻译： 计算机处理器硬件接收的第一组的调整值的。 所述第一组调节值的指定以质量的第一级生成的质量的第一级来重建信号的再现的信号的预测的再现要进行的调整。 计算机处理器硬件处理该第一组调整值的和导出基于所述第一集合的调整值，并在质量的第二电平的信号的再现的第二组调整值的。 质量的第二电平比第一质量水平。

公开(公告)号：EP2837185A1

公开(公告)日：2015-02-18

申请号：EP13775550.0

申请日：2013-04-12

申请人： Canon Kabushiki Kaisha

发明人： KOLESNIKOV, Volodymyr

IPC分类号： H04N7/30 ,  H04N7/26 ,  H03M7/40

CPC分类号： H04N19/60 ,  H03M7/4075 ,  H04N19/124 ,  H04N19/13 ,  H04N19/14 ,  H04N19/18 ,  H04N19/61

摘要： A method of decoding a transform unit (e.g., 400) of encoded video data using Golomb-Rice decoding is disclosed. Significant residual coefficients for a sub-set of the transform unit are determined. A predetermined Rice parameter for Golomb-Rice decoding of the subset of the transform unit is selected. The predetermined Rice parameter being offset from a zero setting when the determined number of significant residual coefficients is higher than a predetermined threshold. The subset of the transform unit is decoded using the predetermined Rice parameter as an initial parameter for the Golomb- Rice decoding.

公开(公告)号：EP2833632A1

公开(公告)日：2015-02-04

申请号：EP13767569.0

申请日：2013-03-26

申请人： JVC Kenwood Corporation

发明人： KUMAKURA, Toru ,  FUKUSHIMA, Shigeru

IPC分类号： H04N7/30

CPC分类号： H04N19/50 ,  H04N19/13 ,  H04N19/176 ,  H04N19/18 ,  H04N19/593 ,  H04N19/70 ,  H04N19/91

摘要： In a picture coding device that partitions difference information that is a transform coefficient of a difference signal between a coding target picture and a prediction picture into a plurality of partial regions, and codes difference coefficients in units of partial regions, a significant coefficient information coding controller 706 and an arithmetic encoder 701 code significant difference coefficient information indicating that a difference coefficient value is not zero and significant for each of the difference coefficients in the partial region of the coding target. A difference coefficient value coding controller 707 and the arithmetic encoder 701 code difference coefficient values when significant difference coefficient information is significant for each of pixels in the partial region of the coding target. The significant coefficient information coding controller 706 decides a context for coding the significant difference coefficient information in the partial region of the coding target based on information indicating significance of the difference coefficient in the coded partial region.

摘要翻译： 在图像编码装置的确分区差异信息所做的是在局部区域为单位的编码目标图像和预测图像分割成部分区域的多个，并且码差分系数之间的变换的差信号的系数，显著系数信息编码控制部 706和算术编码器701码显著差系数信息指示所做的差系数的值不是针对每个在编码对象的部分区域的差分系数的零和显著。 的差的系数值的编码控制器707和算术编码器701的代码差的系数值当显著差系数信息是用于在每一个编码对象的部分区域的像素的显著。 所述显著系数信息编码控制部706决定用于编码在基于信息指示所述系数编码部分区域的差值的显着性的编码对象的部分区域的显著差系数的信息的上下文。

公开(公告)号：EP2805493A1

公开(公告)日：2014-11-26

申请号：EP13701892.5

申请日：2013-01-17

申请人： Futurewei Technologies, Inc.

发明人： GAO, Wen ,  YU, Haoping

IPC分类号： H04N7/26 ,  H04N7/36 ,  H04N7/30

CPC分类号： H04N19/00569 ,  H04N19/117 ,  H04N19/157 ,  H04N19/17 ,  H04N19/46 ,  H04N19/50 ,  H04N19/51 ,  H04N19/625 ,  H04N19/82

摘要： An apparatus comprising a processor configured to generate a reconstructed pixel, selectively bypass at least one in-loop filter on the reconstructed pixel, and generate a prediction pixel for a current pixel using at least the reconstructed pixel when the at least one in-loop filter is bypassed.

摘要翻译： 一种装置，包括被配置为生成重建像素的处理器，选择性地旁路于重构后的像素的至少一个的环路滤波，并且生成用于至少使用所述重构后的像素的当前像素的预测像素。当所述至少一个环路滤波器 被绕过。

公开(公告)号：EP2684358A1

公开(公告)日：2014-01-15

申请号：EP12708488.7

申请日：2012-03-07

申请人： Qualcomm Incorporated

发明人： SOLE ROJALS, Joel ,  JOSHI, Rajan Laxman ,  KARCZEWICZ, Marta

IPC分类号： H04N7/26 ,  H04N7/30 ,  H04N7/50

CPC分类号： H04N19/129 ,  H04N19/00109 ,  H04N19/13 ,  H04N19/136 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/196 ,  H04N19/436 ,  H04N19/463 ,  H04N19/60 ,  H04N19/61 ,  H04N19/619 ,  H04N19/70 ,  H04N19/91

摘要： This disclosure describes techniques for coding transform coefficients associated with a block of residual video data in a video coding process. Aspects of this disclosure include the selection of a scan order for both significance map coding and level coding, as well as the selection of contexts for entropy coding consistent with the selected scan order. This disclosure proposes a harmonization of the scan order to code both the significance map of the transform coefficients as well as to code the levels of the transform coefficient. It is proposed that the scan order for the significance map should be in the inverse direction (i.e., from the higher frequencies to the lower frequencies). This disclosure also proposes that transform coefficients be scanned in subsets as opposed to fixed subblocks. In particular, transform coefficients are scanned in a subset consisting of a number of consecutive coefficients according to the scan order.

公开(公告)号：EP2629523A3

公开(公告)日：2013-12-25

申请号：EP13166503.6

申请日：2011-02-18

申请人： Skype

发明人： Bivolarsky, Lazar ,  Vafin, Renat ,  Nilsson, Mattias ,  Anderson, Soren Vang

IPC分类号： H04N7/26 ,  H04N7/50 ,  H04N7/30

CPC分类号： H04N19/85 ,  H04N19/105 ,  H04N19/126 ,  H04N19/132 ,  H04N19/146 ,  H04N19/154 ,  H04N19/176 ,  H04N19/46 ,  H04N19/48 ,  H04N19/60 ,  H04N19/61

摘要： The invention relates to a method of compressing a video signal for transmission to a decoder of a receiving terminal, the method comprising: receiving a video signal comprising a plurality of frames, each frame comprising a plurality of portions of video data; for each of a plurality of target ones of said portions, generating difference data representing a difference between the target image portion and a respective reference portion; and outputting the difference data in an encoded bitstream; wherein the method comprises, prior to generating the difference data, modifying at least one of said target and reference portions based on a measure of human sensitivity to the video data, so as to reduce a number of bits required to encode the difference data.

公开(公告)号：EP2519006B1

公开(公告)日：2013-11-27

申请号：EP11182993.3

申请日：2011-09-27

申请人： BlackBerry Limited

发明人： Foster, Brett

IPC分类号： H04N7/30 ,  H04N5/232 ,  G11B27/30 ,  G06F7/00 ,  G06F7/22 ,  H04N7/26

CPC分类号： H04N5/23293 ,  H04N19/68

摘要： Various embodiments are described herein for a method and related device for processing a first dataset comprising a second dataset and a third dataset in order to locate the third dataset. The second dataset has a variable data length and terminates with an ending marker and the third dataset starts after the ending marker. The method involves preprocessing a memory element by storing a plurality of locater markers, storing the first dataset in the memory element thereby overwriting a portion of the plurality of locater markers, locating which of the plurality of locater markers is closest to the end of the first dataset; and locating the third dataset by searching for the ending marker of the second dataset based on the position of the closest locater marker.

公开(公告)号：EP2605515A1

公开(公告)日：2013-06-19

申请号：EP10854469.3

申请日：2010-07-09

申请人： IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)

发明人： JANG, Euee S. ,  CHOI, Kiho ,  LEE, Sunyoung ,  KIM, Sikyoung

IPC分类号： H04N7/30

CPC分类号： G06F17/147 ,  H04N19/625

摘要： Discrete cosine transform/inverse discrete cosine transform method and device are provided. The discrete cosine transform/inverse discrete cosine transform method includes: generating a table index for only an input value other than 0 (zero) out of input values of coordinates in an input block; reading one or more partial values corresponding to the table index out of a plurality of table information pieces which are generated and stored in advance so as to include partial values corresponding to a multiplication of a weight value and an index; and adding the read partial value and calculating the resultant value of each coordinate in an output block. Accordingly, it is possible to perform a fast DCT/IDCT operation and to reduce the energy consumption for the transform.

摘要翻译： 提供离散余弦变换/逆离散余弦变换方法和装置。 离散余弦变换/逆离散余弦变换方法包括：仅在输入块中的坐标的输入值之外生成除了0（零）之外的输入值的表索引; 从预先生成和存储的多个表信息中读出与表索引相对应的一个或多个部分值，以便包括对应于权重值和索引的乘法的部分值; 并添加读取的部分值并计算输出块中每个坐标的合成值。 因此，可以执行快速DCT / IDCT操作并且减少用于变换的能量消耗。

公开(公告)号：EP2533210A3

公开(公告)日：2013-03-13

申请号：EP12181643.3

申请日：2003-10-09

申请人： Sony Corporation

发明人： Yagasaki, Yoichi ,  Sunohara, Osamu ,  Murayama, Jun

IPC分类号： G06T9/00 ,  H04N7/30 ,  H04N7/50 ,  H04N7/26

CPC分类号： H04N19/12 ,  H04N19/00569 ,  H04N19/13 ,  H04N19/156 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/50

摘要： A video encoding apparatus with a guarantee of a fixed processing time comprises a encoding unit (41) for performing an arithmetic decoding process with context modeling on the video signal; and a controlling unit (45, 46) for controlling the arithmetic encoding process so as to terminate the arithmetic encoding process and to maintain a context value previously used in the arithmetic encoding process in case of outputting raw data of the video signal as a bit stream and for inserting a bit subjected to a terminal process of the arithmetic encoding process into the bit stream.

公开(公告)号：EP2556670A1

公开(公告)日：2013-02-13

申请号：EP11721145.8

申请日：2011-04-08

申请人： Qualcomm Incorporated

发明人： KARCZEWICZ, Marta ,  WANG, Xianglin

IPC分类号： H04N7/26 ,  H04N7/30 ,  H04N7/50 ,  H03M7/40 ,  H03M7/42

CPC分类号： H03M7/46 ,  H04N19/13 ,  H04N19/134 ,  H04N19/184 ,  H04N19/196 ,  H04N19/197 ,  H04N19/46 ,  H04N19/61 ,  H04N19/93

摘要： A method and system for entropy coding can comprise, in response to detecting a first symbol combination comprising first run information indicating a first number of contiguous zero coefficients is greater than a cut-off-run value, assigning a first codeword to a first symbol combination, wherein the first codeword comprises an escape code from a first-level VLC table; and in response to a second symbol combination comprising second run information indicating a second number of contiguous zero coefficients is less than or equal to the cut-off-run value, assigning a second codeword to the second symbol combination, wherein the second codeword is from the first-level VLC table. The system and method can further comprise collecting coding statistics for a set of candidate symbol combinations and adjusting a mapping between codewords of the first-level VLC table and a subset of the set of candidate symbol combinations based on the coding statistics.