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1. 发明申请

WO2013012930A9 COEFFICIENT SCANNING IN VIDEO CODING 审中-公开
公开(公告)号：WO2013012930A9
公开(公告)日：2013-01-24
申请号：PCT/US2012/047220
申请日：2012-07-18
申请人： QUALCOMM Incorporated , JOSHI, Rajan Laxman , SOLE ROJALS, Joel , KARCZEWICZ, Marta , ZHENG, Yunfei , WANG, Xianglin
发明人： JOSHI, Rajan Laxman , SOLE ROJALS, Joel , KARCZEWICZ, Marta , ZHENG, Yunfei , WANG, Xianglin
IPC分类号： H04N7/26 , H04N7/50
摘要： In an example, aspects of this disclosure relate to a method for decoding transform coefficients in a video decoding process that includes decoding a one-dimensional array of transform coefficients, and performing a scan on the one-dimensional array of transform coefficients according to a sub-block scan order and a coefficient scan order to produce a block of transform coefficients, where the sub-block scan order comprises an order in which each sub-block of a plurality of sub-blocks within the block is scanned, and where the coefficient scan order comprises an order in which the transform coefficients corresponding to each sub-block of the plurality of sub-blocks are scanned.

2. 发明申请

WO2005006765A1 METHOD FOR TRANSCODING A JPEG2000 COMPRESSED IMAGE 审中-公开
标题翻译： JPEG2000压缩图像的转移方法
公开(公告)号：WO2005006765A1
公开(公告)日：2005-01-20
申请号：PCT/US2004/021236
申请日：2004-07-01
申请人： EASTMAN KODAK COMPANY , JOSHI, Rajan Laxman , RABBANI, Majid
发明人： JOSHI, Rajan Laxman , RABBANI, Majid
IPC分类号： H04N7/26
CPC分类号： H04N19/40 , H04N19/115 , H04N19/146 , H04N19/147 , H04N19/187 , H04N19/63
摘要： A JPEG2000 compressed image is transcoded to a lower bit-rate or lower resolution, or both, without having to decompress the initial JPEG2000 image and then recompress it to a lower bit-rate and/or resolution. Instead, arithmetic decoding is performed only to the nearest higher bit-rate layer, up to the desired resolution, before performing rate-distortion optimization to produce the transcoded image.
摘要翻译： JPEG2000压缩图像被转码为较低的比特率或较低的分辨率，或两者，而无需解压缩初始JPEG2000图像，然后将其重新压缩为较低的比特率和/或分辨率。相反，在执行速率失真优化之前，仅对最接近的较高比特率层执行算术解码，直到期望的分辨率，以产生代码转换的图像。

3. 发明申请

WO2013006297A9 APPLYING NON-SQUARE TRANSFORMS TO VIDEO DATA 审中-公开
标题翻译：对视频数据应用非平方转换
公开(公告)号：WO2013006297A9
公开(公告)日：2013-03-07
申请号：PCT/US2012044043
申请日：2012-06-25
申请人： QUALCOMM INC , GUO LIWEI , SOLE ROJALS JOEL , JOSHI RAJAN LAXMAN , CHEN PEISONG , WANG XIANGLIN , KARCZEWICZ MARTA
发明人： GUO LIWEI , SOLE ROJALS JOEL , JOSHI RAJAN LAXMAN , CHEN PEISONG , WANG XIANGLIN , KARCZEWICZ MARTA
IPC分类号： H04N7/26
CPC分类号： H04N19/96 , H04N19/119 , H04N19/122 , H04N19/176 , H04N19/46 , H04N19/70
摘要： In one example, a device for coding video data includes a video coder, such as a video encoder or a video decoder, that is configured to code information indicative of whether a transform unit of the video data is square or non-square, and code data of the transform unit based at least in part on whether the transform unit is square or non- square. In this manner, the video coder may utilize non-square transform units. The video coder may be configured to use non-square transform units for certain situations, such as only for chrominance or luminance components or only when a corresponding prediction unit is non-square. The video coder may further be configured to perform an entropy coding process that selects context for coding data of the transform unit based on whether the transform unit is square or non-square.
摘要翻译：在一个示例中，用于对视频数据进行译码的设备包括视频译码器，例如视频编码器或视频译码器，其经配置以译码指示视频数据的变换单元是正方形还是非正方形的信息，且代码变换单元的数据至少部分基于变换单元是正方形还是非正方形。以此方式，视频译码器可使用非正方形变换单元。视频译码器可经配置以针对某些情况使用非正方形变换单元，例如仅针对色度或亮度分量或仅当对应预测单元为非正方形时使用非正方形变换单元。视频译码器可进一步经配置以执行熵编码过程，所述熵译码过程基于变换单元是正方形还是非正方形而选择用于编码变换单元的数据的上下文。

4. 发明申请

WO2013022748A1 CODING OF TRANSFORM COEFFICIENTS FOR VIDEO CODING 审中-公开
标题翻译：用于视频编码的变换系数编码
公开(公告)号：WO2013022748A1
公开(公告)日：2013-02-14
申请号：PCT/US2012/049518
申请日：2012-08-03
申请人： QUALCOMM INCORPORATED , SOLE ROJALS, Joel , JOSHI, Rajan Laxman , KARCZEWICZ, Marta
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： H04N19/13 , H04N19/129 , H04N19/157 , H04N19/18 , H04N19/184 , H04N19/436 , H04N19/60 , H04N19/61 , H04N19/91
摘要： This disclosure describes 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 sub-sets as opposed to fixed subblocks. In particular, transform coefficients are scanned in a sub-set consisting of a number of consecutive coefficients according to the scan order.
摘要翻译：本公开描述了在视频编码过程中与残留视频数据块相关联的编码变换系数。本公开的方面包括选择重要性地图编码和级别编码的扫描顺序，以及与所选择的扫描顺序一致的用于熵编码的上下文的选择。本公开提出了对扫描顺序进行协调以对变换系数的有效图进行编码以及对变换系数的等级进行编码。提出，显着图的扫描顺序应该在相反方向（即，从较高频率到较低频率）。本公开还提出，与固定子块相反，在子集中扫描变换系数。具体地，根据扫描顺序，在由多个连续系数组成的子集中扫描变换系数。

5. 发明申请

WO2013006446A1 CONTEXT ADAPTIVE ENTROPY CODING FOR NON-SQUARE BLOCKS IN VIDEO CODING 审中-公开
标题翻译：视频编码中非平方块的自适应熵编码
公开(公告)号：WO2013006446A1
公开(公告)日：2013-01-10
申请号：PCT/US2012/044967
申请日：2012-06-29
申请人： QUALCOMM INCORPORATED , SOLE ROJALS, Joel , JOSHI, Rajan Laxman , KARCZEWICZ, Marta
发明人： SOLE ROJALS, Joel , JOSHI, Rajan Laxman , KARCZEWICZ, Marta
IPC分类号： H04N7/26
CPC分类号： H04N19/60 , H04N19/129 , H04N19/13 , H04N19/176 , H04N19/18 , H04N19/45 , H04N19/625 , H04N19/91 , H04N19/93 , H04W88/02
摘要： Disclosed are techniques for coding coefficients of a video block having a nonsquare shape defined by a width and a height, comprising coding one or more of x- and y-coordinates that indicate a position of a last non-zero coefficient within the block according to an associated scanning order, including coding each coordinate by determining one or more contexts used to code the coordinate based on one of the width and the height that corresponds to the coordinate, and coding the coordinate by performing a context adaptive entropy coding process based on the contexts. Also disclosed are techniques for coding information that identifies positions of non-zero coefficients within the block, including determining one or more contexts used to code the information based on one or more of the width and the height, and coding the information by performing a context adaptive entropy coding process based on the contexts.
摘要翻译：公开了用于对具有由宽度和高度限定的非正方形的视频块的系数进行编码的技术，包括编码一个或多个x坐标和y坐标，该坐标指示块内的最后一个非零系数的位置，根据相关联的扫描顺序，包括通过基于与坐标相对应的宽度和高度之一来确定用于对坐标进行编码的一个或多个上下文来对每个坐标进行编码，以及通过基于该坐标进行上下文自适应熵编码处理来对该坐标进行编码上下文。还公开了用于编码识别块内的非零系数的位置的信息的技术，包括基于宽度和高度中的一个或多个来确定用于对信息进行编码的一个或多个上下文，以及通过执行上下文对信息进行编码基于上下文的自适应熵编码过程。

6. 发明申请

WO2013003584A1 DERIVATION OF THE POSITION IN SCAN ORDER OF THE LAST SIGNIFICANT TRANSFORM COEFFICIENT IN VIDEO CODING 审中-公开
标题翻译：最终重要变换系数扫描序列中视频编码中的位置派生
公开(公告)号：WO2013003584A1
公开(公告)日：2013-01-03
申请号：PCT/US2012/044633
申请日：2012-06-28
申请人： QUALCOMM INCORPORATED , SOLE ROJALS, Joel , JOSHI, Rajan Laxman , KARCZEWICZ, Marta
发明人： SOLE ROJALS, Joel , JOSHI, Rajan Laxman , KARCZEWICZ, Marta
IPC分类号： H04N7/26
CPC分类号： H04N19/13 , H04N19/129 , H04N19/196 , H04N19/44 , H04N19/463 , H04N19/91
摘要： A video decoder converts a block-based LSC indicator into a scan-based LSC indicator. The block-based LSC indicator indicates coordinates of a last significant coefficient of a block of transform coefficients according to a scanning order. The scan-based LSC indicator indicates an ordinal position of the LSC according to the scanning order. The video decoder may decode, based on the scan-based LSC indicator, a significance map for the block.
摘要翻译：视频解码器将基于块的LSC指示符转换为基于扫描的LSC指示符。基于块的LSC指示符根据扫描顺序指示变换系数块的最后有效系数的坐标。基于扫描的LSC指示符根据扫描顺序指示LSC的序数位置。视频解码器可以基于基于扫描的LSC指示符解码该块的重要性映射。

7. 发明申请

WO2013003581A1 CODING OF LAST SIGNIFICANT TRANSFORM COEFFICIENT 审中-公开
标题翻译：最新重要变换系数的编码
公开(公告)号：WO2013003581A1
公开(公告)日：2013-01-03
申请号：PCT/US2012/044629
申请日：2012-06-28
申请人： QUALCOMM INCORPORATED , SOLE ROJALS, Joel , CHIEN, Wei-Jung , JOSHI, Rajan Laxman , KARCZEWICZ, Marta
发明人： SOLE ROJALS, Joel , CHIEN, Wei-Jung , JOSHI, Rajan Laxman , KARCZEWICZ, Marta
IPC分类号： H04N7/26
CPC分类号： H04N19/13 , H04N19/129 , H04N19/196 , H04N19/44 , H04N19/463 , H04N19/91
摘要： A video encoder determines that the last significant coefficient (LSC) of a transform coefficient block occurs at a given ordinal position according to a coding scanning order. The video encoder generates a coordinate indicator that specifies the coordinates of a given transform coefficient in the transform coefficient block. The given transform coefficient occurs at the same ordinal position according to an assumed scanning order. A video decoder receives the coordinate indicator and converts the coordinate indicator into a scan-based LSC indicator. The scan-based LSC indicator indicates the ordinal position of the LSC.
摘要翻译：视频编码器根据编码扫描顺序确定变换系数块的最后有效系数（LSC）发生在给定的顺序位置处。视频编码器生成指定变换系数块中的给定变换系数的坐标的坐标指示符。给定的变换系数根据假定的扫描顺序发生在相同的序数位置。视频解码器接收坐标指示符并将坐标指示符转换为基于扫描的LSC指示符。基于扫描的LSC指示符表示LSC的顺序位置。

8. 发明申请

WO2009002321A1 ENHANCING IMAGE QUALITY 审中-公开
标题翻译：增强图像质量
公开(公告)号：WO2009002321A1
公开(公告)日：2008-12-31
申请号：PCT/US2007/015114
申请日：2007-06-27
申请人： THOMSON LICENSING , JOSHI, Rajan, Laxman , FANCHER, James, Arthur , BENITEZ, Ana, Belen
发明人： JOSHI, Rajan, Laxman , FANCHER, James, Arthur , BENITEZ, Ana, Belen
IPC分类号： H04N7/26 , H04N7/46
CPC分类号： H04N19/59 , H04N19/33 , H04N19/46 , H04N19/48 , H04N19/63
摘要： A low-resolution image extracted from a scalable high-resolution bit stream in a DCP bit stream is provided with enhanced quality. One process includes creating (302, 504) a compressed code-stream for an image such that a higher-resolution compressed bitstream and a lower-resolution compressed bitstream can be extracted before decompression. An enhancement-layer compressed code-stream (enhancement layer) is created (524) for enhancing an image corresponding to the lower-resolution bitstream. A data package is formed (918, 1110, 1306) including the compressed code-stream and at least one of (1) the enhancement layer or (2) a pointer to the enhancement layer. The data package is sent (918, 1112, 1308) for receipt by a device configured to extract the lower-resolution bitstream, and to enhance the image corresponding to the lower-resolution bitstream by using the enhancement layer. A complimentary signal and decoding process are also provided, as well as structures for performing the processes.
摘要翻译：从DCP比特流中的可扩展的高分辨率比特流提取的低分辨率图像被提供有更高的质量。一个过程包括为图像创建（302,504）压缩码流，使得可以在解压缩之前提取更高分辨率的压缩比特流和较低分辨率的压缩比特流。创建增强层压缩码流（增强层）（524），用于增强对应于较低分辨率比特流的图像。形成数据包（918,1110,1306），包括压缩码流和（1）增强层或（2）指向增强层的指针中的至少一个。发送数据包（918,1112,1308），以便被配置为提取低分辨率比特流的设备接收，并且通过使用增强层来增强与较低分辨率比特流相对应的图像。还提供了补充信号和解码过程，以及用于执行处理的结构。

9. 发明申请

WO2013012930A1 COEFFICIENT SCANNING IN VIDEO CODING 审中-公开
标题翻译：视频编码中的系统扫描
公开(公告)号：WO2013012930A1
公开(公告)日：2013-01-24
申请号：PCT/US2012047220
申请日：2012-07-18
申请人： QUALCOMM INC , JOSHI RAJAN LAXMAN , SOLE ROJALS JOEL , KARCZEWICZ MARTA , ZHENG YUNFEI , WANG XIANGLIN
发明人： JOSHI RAJAN LAXMAN , SOLE ROJALS JOEL , KARCZEWICZ MARTA , ZHENG YUNFEI , WANG XIANGLIN
IPC分类号： H04N7/26 , H04N7/50
CPC分类号： H04N19/625 , H04N19/129 , H04N19/147 , H04N19/159 , H04N19/176 , H04N19/436 , H04N19/61
摘要： In an example, aspects of this disclosure relate to a method for decoding transform coefficients in a video decoding process that includes decoding a one-dimensional array of transform coefficients, and performing a scan on the one-dimensional array of transform coefficients according to a sub-block scan order and a coefficient scan order to produce a block of transform coefficients, where the sub-block scan order comprises an order in which each sub-block of a plurality of sub-blocks within the block is scanned, and where the coefficient scan order comprises an order in which the transform coefficients corresponding to each sub-block of the plurality of sub-blocks are scanned.
摘要翻译：在一个示例中，本公开的方面涉及用于解码视频解码处理中的变换系数的方法，该方法包括对变换系数的一维阵列进行解码，以及根据子像素对变换系数的一维阵列进行扫描块扫描顺序和系数扫描顺序以产生变换系数块，其中子块扫描顺序包括其中扫描块内的多个子块的每个子块的顺序，并且其中系数扫描顺序包括扫描与多个子块中的每个子块相对应的变换系数的顺序。

10. 发明申请

WO2013006297A1 APPLYING NON-SQUARE TRANSFORMS TO VIDEO DATA 审中-公开
标题翻译：将非正方形变换应用于视频数据
公开(公告)号：WO2013006297A1
公开(公告)日：2013-01-10
申请号：PCT/US2012/044043
申请日：2012-06-25
申请人： QUALCOMM INCORPORATED , GUO, Liwei , SOLE ROJALS, Joel , JOSHI, Rajan Laxman , CHEN, Peisong , WANG, Xianglin , KARCZEWICZ, Marta
发明人： GUO, Liwei , SOLE ROJALS, Joel , JOSHI, Rajan Laxman , CHEN, Peisong , WANG, Xianglin , KARCZEWICZ, Marta
IPC分类号： H04N7/26
CPC分类号： H04N19/96 , H04N19/119 , H04N19/122 , H04N19/176 , H04N19/46 , H04N19/70
摘要： In one example, a device for coding video data includes a video coder, such as a video encoder or a video decoder, that is configured to code information indicative of whether a transform unit of the video data is square or non-square, and code data of the transform unit based at least in part on whether the transform unit is square or non- square. In this manner, the video coder may utilize non-square transform units. The video coder may be configured to use non-square transform units for certain situations, such as only for chrominance or luminance components or only when a corresponding prediction unit is non-square. The video coder may further be configured to perform an entropy coding process that selects context for coding data of the transform unit based on whether the transform unit is square or non-square.
摘要翻译：在一个示例中，用于编码视频数据的设备包括诸如视频编码器或视频解码器的视频编码器，其被配置为对指示视频数据的变换单元是正方形还是非正方形的信息进行编码，以及代码所述变换单元的数据至少部分地基于所述变换单元是平方还是非正方形。以这种方式，视频编码器可以利用非正方形变换单元。视频编码器可以被配置为在诸如仅用于色度或亮度分量的某些情况下使用非平方变换单元，或者仅当相应的预测单元是非正方形时才使用。视频编码器还可以被配置为执行熵编码处理，其基于变换单元是正方形还是非正方形来选择用于对变换单元的数据进行编码的上下文。

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