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公开(公告)号：US20120177108A1
公开(公告)日：2012-07-12
申请号：US13346632
申请日：2012-01-09
CPC分类号： G06F17/147 , H04N19/625
摘要： In general, techniques are described for implementing a 32-point discrete cosine transform (DCT) that is capable of applying multiple DCTs of different sizes. For example, an apparatus comprising a 32-point discrete cosine transform of type II (DCT-II) unit may implement the techniques of this disclosure. The 32-point DCT-II unit performs these DCTs-II of different sizes to transform data from a spatial to a frequency domain. The 32-point DCT-II unit includes an 16-point DCT-II unit that performs one of the DCTs-II of size 16 and at least one 8-point DCT-II unit that performs one of the DCTs-II of size 8. The 16-point DCT-II unit includes another 8-point DCT-II unit. The 16-point DCT-II unit also comprises at least one 4-point DCTs-II unit. Two or more of these DCTs-II units may concurrently perform DCTs-II of different sizes to various portions of the content data.
摘要翻译： 通常，描述了用于实现能够应用不同尺寸的多个DCT的32点离散余弦变换（DCT）的技术。 例如，包括II型（DCT-II）单元的32点离散余弦变换的装置可以实现本公开的技术。 32点DCT-II单元执行不同尺寸的DCT-II，以将数据从空间转换到频域。 32点DCT-II单元包括执行尺寸为16的DCT-II之一的16点DCT-II单元和执行尺寸为8的DCT-II之一的至少一个8点DCT-II单元 16点DCT-II单元包括另外8点DCT-II单元。 16点DCT-II单元还包括至少一个4点DCT-II单元。 这些DCT-II单元中的两个或更多个可以对内容数据的各个部分同时执行不同大小的DCT-II。
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公开(公告)号：US09824066B2
公开(公告)日：2017-11-21
申请号：US13346632
申请日：2012-01-09
IPC分类号： G06F17/14 , H04N19/625
CPC分类号： G06F17/147 , H04N19/625
摘要： In general, techniques are described for implementing a 32-point discrete cosine transform (DCT) that is capable of applying multiple DCTs of different sizes. For example, an apparatus comprising a 32-point discrete cosine transform of type II (DCT-II) unit may implement the techniques of this disclosure. The 32-point DCT-II unit performs these DCTs-II of different sizes to transform data from a spatial to a frequency domain. The 32-point DCT-II unit includes an 16-point DCT-II unit that performs one of the DCTs-II of size 16 and at least one 8-point DCT-II unit that performs one of the DCTs-II of size 8. The 16-point DCT-II unit includes another 8-point DCT-II unit. The 16-point DCT-II unit also comprises at least one 4-point DCTs-II unit. Two or more of these DCTs-II units may concurrently perform DCTs-II of different sizes to various portions of the content data.
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公开(公告)号：US09807426B2
公开(公告)日：2017-10-31
申请号：US13422828
申请日：2012-03-16
申请人： Liwei Guo , Joel Sole Rojals , Rajan Laxman Joshi , Peisong Chen , Xianglin Wang , Marta Karczewicz
发明人： Liwei Guo , Joel Sole Rojals , Rajan Laxman Joshi , Peisong Chen , Xianglin Wang , Marta Karczewicz
IPC分类号： H04N7/50 , H04N19/96 , H04N19/176 , H04N19/70 , H04N19/119 , H04N19/46 , H04N19/122
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.
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公开(公告)号：US09756360B2
公开(公告)日：2017-09-05
申请号：US13551458
申请日：2012-07-17
IPC分类号： H04B1/66 , H04N7/12 , H04N11/02 , H04N11/04 , H04N19/625 , H04N19/159 , H04N19/176 , H04N19/147 , H04N19/129 , H04N19/61 , H04N19/436
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.
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5.发明授权Derivation of the position in scan order of the last significant transform coefficient in video coding 有权以视频编码中最后一个有效变换系数的扫描顺序推导位置公开(公告)号：US09167253B2
公开(公告)日：2015-10-20
申请号：US13534306
申请日：2012-06-27
IPC分类号： H04N19/13 , H04N19/91 , H04N19/196 , H04N19/129 , H04N19/463 , H04N19/44
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。
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公开(公告)号：US09042440B2
公开(公告)日：2015-05-26
申请号：US13303015
申请日：2011-11-22
IPC分类号： H04N19/13 , H04N19/91 , H03M7/40 , H03M7/30 , H04N19/176 , H04N19/70 , H04N19/61 , H04N19/436
CPC分类号： H04N19/13 , H03M7/30 , H03M7/40 , H03M7/4018 , H03M7/6035 , H04N19/176 , H04N19/436 , H04N19/61 , H04N19/70 , H04N19/91
摘要： In one example, an apparatus is disclosed for coding coefficients associated with a block of video data during a video coding process, wherein the apparatus includes a video coder configured to code x- and y-coordinates that indicate a position of a last non-zero coefficient within the block according to a scanning order associated with the block when the scanning order comprises a first scanning order, and code interchanged x- and y-coordinates that indicate the position of the last non-zero coefficient within the block according to the scanning order when the scanning order comprises a second scanning order, wherein the second scanning order is different than the first scanning order.
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公开(公告)号：US09379736B2
公开(公告)日：2016-06-28
申请号：US13485225
申请日：2012-05-31
IPC分类号： H04N7/12 , H03M7/00 , H03M7/30 , H03M7/40 , H04N19/196 , H04N19/13 , H04N19/463 , H04N19/436
CPC分类号： H03M7/6023 , H03M7/4018 , H03M7/6011 , H04N19/13 , H04N19/196 , H04N19/436 , H04N19/463
摘要： In an example, aspects of this disclosure relate to a method of coding data that includes coding a sequence of bins according to a context adaptive entropy coding process. A current coding cycle used to code at least one bin of the sequence of bins includes determining a context for the bin; selecting a probability model based on the context, wherein the probability model is updated based on a value of a previous bin coded with the context and coded at least two coding cycles prior to the current coding cycle; applying the probability model to code the bin; and updating the probability model based on a value of the bin.
摘要翻译： 在一个示例中，本公开的方面涉及一种编码数据的方法，所述数据包括根据上下文自适应熵编码处理来对码序列进行编码。 用于对码序列的至少一个bin进行编码的当前编码周期包括确定所述仓的上下文; 基于所述上下文选择概率模型，其中，所述概率模型基于用所述上下文编码的先前存储块的值进行更新，并且在当前编码周期之前编码至少两个编码周期; 应用概率模型对仓进行编码; 并且基于所述仓的值更新所述概率模型。
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公开(公告)号：US09106913B2
公开(公告)日：2015-08-11
申请号：US13565621
申请日：2012-08-02
IPC分类号： H04N19/18 , H04N19/00 , H04N19/13 , H04N19/129 , H04N19/61 , H04N19/60 , H04N19/91 , H04N19/157 , H04N19/184 , H04N19/436
CPC分类号： H04N19/13 , H04N19/129 , H04N19/157 , H04N19/18 , H04N19/184 , H04N19/436 , H04N19/60 , H04N19/61 , H04N19/91
摘要： In an example, a method includes coding significance information for transform coefficients in a set of transform coefficients associated with the residual video data according to a scan order in one or more first passes. The method also includes coding a first set of one or more bins of information for the transform coefficients according to the scan order in one or more second passes, where the first set of one or more bins are coded in a first mode of a coding process. The method also includes coding a second set of one or more bins of information for the transform coefficients according to the scan order in one or more third passes, where the second set of one or more bins are coded in a second mode of the coding process.
摘要翻译： 在一个示例中，一种方法包括根据一个或多个第一遍中的扫描顺序对与残留视频数据相关联的一组变换系数中的变换系数进行编码有效信息。 该方法还包括在一个或多个第二遍中根据扫描顺序对用于变换系数的一个或多个信息的第一组信号进行编码，其中第一组一个或多个存储体以编码处理的第一模式被编码 。 该方法还包括在一个或多个第三遍中根据扫描顺序对用于变换系数的一个或多个信息的第二组信息进行编码，其中第二组一个或多个存储体以编码处理的第二模式被编码 。
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公开(公告)号：US20130083856A1
公开(公告)日：2013-04-04
申请号：US13535975
申请日：2012-06-28
IPC分类号： H04N7/26
摘要： This disclosure describes techniques for coding video data. In particular, this disclosure describes techniques for entropy coding of residual transform coefficients generated by a video coding process. In one example, a method selects a bin 2 context for coding a bin 2 level of one or more transform coefficients in the vector according to the entropy coding process. The method further codes the bin 2 level of one or more transform coefficients in the vector according to the selected bin 2 context. Selecting the bin 2 context comprises selecting the bin 2 context for a current transform coefficient in the vector based on the bin 2 level of one or more previously coded transform coefficients in the vector.
摘要翻译： 本公开描述了用于编码视频数据的技术。 特别地，本公开描述了由视频编码处理生成的残差变换系数的熵编码技术。 在一个示例中，方法根据熵编码处理选择用于编码向量中的一个或多个变换系数的bin 2级的bin 2上下文。 该方法还根据所选择的bin 2上下文对向量中的一个或多个变换系数的bin 2级进行编码。 选择bin 2上下文包括基于向量中的一个或多个先前编码的变换系数的bin 2级别来选择向量中的当前变换系数的bin 2上下文。
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公开(公告)号：US20120121011A1
公开(公告)日：2012-05-17
申请号：US13294869
申请日：2011-11-11
IPC分类号： H04N7/30
CPC分类号： H04N19/436 , H04N19/102 , H04N19/129 , H04N19/13 , H04N19/134 , H04N19/176 , H04N19/18 , H04N19/196 , H04N19/463
摘要： In one example, a method for coding video data includes identifying a scan path for scanning significance information associated with a quantized transform coefficient. The method also includes determining a context support neighborhood for entropy coding the significance information associated with the quantized transform coefficient, wherein the context support neighborhood excludes one or more context support elements that are located in the scan path. The method also includes coding the significance information using the modified context support neighborhood.
摘要翻译： 在一个示例中，用于编码视频数据的方法包括识别用于扫描与量化变换系数相关联的有效信息的扫描路径。 该方法还包括确定用于熵编码与量化变换系数相关联的重要性信息的上下文支持邻域，其中上下文支持邻域排除位于扫描路径中的一个或多个上下文支持元素。 该方法还包括使用修改的上下文支持邻域对重要性信息进行编码。
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