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公开(公告)号：US10321162B2
公开(公告)日：2019-06-11
申请号：US15175944
申请日：2016-06-07
Applicant: QUALCOMM Incorporated
Inventor： Adarsh Krishnan Ramasubramonian , Xiang Li , Joel Sole Rojals , Marta Karczewicz , Sungwon Lee , Dmytro Rusanovskyy , Done Bugdayci Sansli
IPC: H04N19/00 , H04N19/86 , H04N19/187 , H04N19/615 , H04N19/147 , H04N19/119 , H04N19/587 , H04N19/105 , H04N19/96 , H04N19/13 , H04N19/50 , H04N19/176 , H04N19/30 , H04N19/103 , H04N19/186 , H04N19/36
Abstract: Techniques are described for identifying and reducing the incidence of artifacts in video using color gamut scalability (CGS) parameters and tables in scalable video coding (SVC). Derivation of CGS mapping tables are performed for each partition of pixel values in a color space. The pixel value domain is split into partitions and each is optimized independently. Color prediction techniques for CGS may be used by video encoders and/or video decoders to generate inter-layer reference pictures when a color gamut for a lower layer of video data is different than a color gamut for a higher layer of the video data. When mapped values are used as inter-layer predication references for the enhancement layer blocks, artifacts may appear in some frames of the sequences. A video encoder may identify blocks that potentially contain these artifacts and disable inter-layer prediction in those identified blocks.
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公开(公告)号：US10244245B2
公开(公告)日：2019-03-26
申请号：US15176034
申请日：2016-06-07
Applicant: QUALCOMM Incorporated
Inventor： Dmytro Rusanovskyy , Sungwon Lee , Done Bugdayci Sansli , Joel Sole Rojals , Adarsh Krishnan Ramasubramonian , Marta Karczewicz
IPC: H04N19/169 , H04N19/186 , H04N19/615 , H04N19/117 , H04N19/136 , H04N19/85 , H04N19/98
Abstract: This disclosure relates to processing video data, including processing video data to conform to a high dynamic range (HDR)/wide color gamut (WCG) color container. The techniques apply, on an encoding side, pre-processing of color values prior to application of a static transfer function and/or apply post-processing on the output from the application of the static transfer function. By applying pre-processing, the examples may generate color values that when compacted into a different dynamic range by application of the static transfer function linearize the output codewords. By applying post-processing, the examples may increase signal to quantization noise ratio. The examples may apply the inverse of the operations on the encoding side on the decoding side to reconstruct the color values.
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公开(公告)号：US10158866B2
公开(公告)日：2018-12-18
申请号：US14864331
申请日：2015-09-24
Applicant: QUALCOMM Incorporated
Inventor： Wei Pu , Joel Sole Rojals , Marta Karczewicz , Rajan Laxman Joshi , Cheng-Teh Hsieh , Vadim Seregin
IPC: H04N7/12 , H04N19/186 , H04N19/103 , H04N19/176 , H04N19/182 , H04N19/93 , H04N19/13 , H04N19/593 , H04N19/91 , H04N19/157
Abstract: In an example, a method of processing video data includes determining an input parameter for a truncated binary code that represents a palette index for a pixel of a block of video data based on a number of indices in a palette for the block. The method also includes coding a prefix of the truncated binary code, and determining a palette coding mode for the pixel from a first palette coding mode and a second palette coding mode based only on the prefix of the truncated binary code.
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公开(公告)号：US09961351B2
公开(公告)日：2018-05-01
申请号：US14952438
申请日：2015-11-25
Applicant: QUALCOMM Incorporated
Inventor： Rajan Laxman Joshi , Liwei Guo , Marta Karczewicz , Wei Pu , Joel Sole Rojals
IPC: H04N7/12 , H04N19/176 , H04N19/13 , H04N19/593 , H04N19/157
CPC classification number: H04N19/176 , H04N19/13 , H04N19/157 , H04N19/593
Abstract: A device for decoding video data may be configured to determine a block of the video data is coded using a palette-based coding mode; determine a sample of the block of video data is coded using a copy from top mode or an index mode; and decode a greater than zero flag to indicate whether a run value is greater than zero, wherein the run value specifies a number of samples subsequent to the sample that have a same mode as the sample.
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公开(公告)号：US20180048913A1
公开(公告)日：2018-02-15
申请号：US15670832
申请日：2017-08-07
Applicant: QUALCOMM Incorporated
Inventor： Joel Sole Rojals , Done Bugdayci Sansli , Adarsh Krishnan Ramasubramonian , Dmytro Rusanovskyy
IPC: H04N19/597 , H04N19/30 , H04N19/52
CPC classification number: H04N19/597 , H04N19/186 , H04N19/30 , H04N19/46 , H04N19/52 , H04N19/70 , H04N19/85
Abstract: In one example, a method includes determining, by a video decoding unit, a peak brightness value of a current display; obtaining, by the video decoding unit and for a picture of video data, one or more colour remapping messages that each correspond to a respective peak brightness value of a set of peak brightness values; selecting, by the video decoding unit and based on the peak brightness value of the current display, a colour remapping message of the one or more colour remapping messages; colour remapping, by the video decoding unit and based on the selected colour remapping message, samples of the picture of video data; and outputting, by the video decoding unit and for display at the current display, the colour remapped samples of the picture of video data.
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Patent Agency Ranking
公开(公告)号：US09848198B2
公开(公告)日：2017-12-19
申请号：US14875398
申请日：2015-10-05
Applicant: QUALCOMM Incorporated
Inventor： Wei Pu , Marta Karczewicz , Vadim Seregin , Feng Zou , Rajan Laxman Joshi , Joel Sole Rojals
IPC: H04B1/66 , H04N19/186 , H04N19/182 , H04N19/70 , H04N19/593
CPC classification number: H04N19/186 , H04N19/182 , H04N19/593 , H04N19/70
Abstract: Techniques are described where a current pixel that cannot be palette mode coded in copy above mode and is not coded in a copy index mode is palette mode coded based on a palette index of a diagonal pixel.
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公开(公告)号：US09621921B2
公开(公告)日：2017-04-11
申请号：US13834006
申请日：2013-03-15
Applicant: QUALCOMM Incorporated
Inventor： Joel Sole Rojals , Rajan Laxman Joshi , Marta Karczewicz
IPC: H04N19/129 , H04N19/60 , H04N19/176 , H04N19/13 , H04N19/102 , H04N19/18 , H04N19/167 , H03M7/40
CPC classification number: H04N19/60 , H03M7/40 , H03M7/4018 , H04N19/102 , H04N19/129 , H04N19/13 , H04N19/167 , H04N19/176 , H04N19/18
Abstract: Techniques are described for a video coder (e.g., video encoder or video decoder) that is configured to select a context pattern from a plurality of context patterns that are the same for a plurality of scan types. Techniques are also described for a video coder that is configured to select a context pattern that is stored as a one-dimensional context pattern and identifies contexts for two or more scan types.
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18.发明授权公开(公告)号：US09538175B2
公开(公告)日：2017-01-03
申请号：US14037159
申请日：2013-09-25
Applicant: QUALCOMM Incorporated
Inventor： Marta Karczewicz , Joel Sole Rojals , Liwei Guo
CPC classification number: H04N19/18 , H04N19/463 , H04N19/61 , H04N19/647 , H04N19/70 , H04N19/91 , H04N19/96
Abstract: A device for coding video data includes a video coder configured to code first significance information for transform coefficients associated with residual data, wherein the first significance information indicates if a first sub-block comprises at least one non-zero coefficient, wherein the first sub-block is a sub-block of an entire transform block; and, code second significance information, wherein the second significance information indicates if a second sub-block comprises at least one non-zero coefficient, wherein the second sub-block is a sub-block of the first sub-block, wherein coding the second significance information comprises performing an arithmetic coding operation on the second significance information, wherein a context for the arithmetic coding operation is determined based on one or more neighboring sub-blocks of a same size as the first sub-block.
Abstract translation: 一种用于编码视频数据的设备包括：视频编码器，被配置为对与残差数据相关联的变换系数编码第一有效信息，其中第一有效信息指示第一子块是否包括至少一个非零系数，其中， 块是整个变换块的子块; 以及代码第二有效信息，其中第二有效信息指示第二子块是否包括至少一个非零系数，其中第二子块是第一子块的子块，其中编码第二子块 重要信息包括对第二有效信息执行算术编码操作，其中基于与第一子块相同大小的一个或多个相邻子块来确定用于算术编码操作的上下文。
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公开(公告)号：US09445132B2
公开(公告)日：2016-09-13
申请号：US14021589
申请日：2013-09-09
Applicant: QUALCOMM Incorporated
Inventor： Liwei Guo , Marta Karczewicz , Joel Sole Rojals , Wei-Jung Chien , Rajan Laxman Joshi
CPC classification number: H04N19/91 , H04N19/129 , H04N19/13 , H04N19/18 , H04N19/60
Abstract: In some examples, a video coder employs a two-level technique to code information that identifies a position within the block of transform coefficients of one of the coefficients that is a last significant coefficient (LSC) for the block according to a scanning order associated with the block of transform coefficients. For example, a video coder may code a sub-block position that identifies a position of one of the sub-blocks that includes the LSC within the block, and code a coefficient position that identifies a position of the LSC within the sub-block that includes the LSC.
Abstract translation: 在一些示例中，视频编码器采用两级技术来编码信息，该信息根据与该数据块相关联的扫描顺序来识别作为该块的最后有效系数（LSC）的一个系数的变换系数块内的位置 变换系数块。 例如，视频编码器可以对在块内标识包括LSC的子块之一的位置的子块位置进行编码，并对识别子块内的LSC的位置的系数位置进行编码， 包括LSC。
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公开(公告)号：US09350998B2
公开(公告)日：2016-05-24
申请号：US13929287
申请日：2013-06-27
Applicant: QUALCOMM Incorporated
Inventor： Rajan Laxman Joshi , Joel Sole Rojals , Marta Karczewicz
CPC classification number: H04N19/60 , H04N19/13 , H04N19/18 , H04N19/463
Abstract: A video coder determines, based at least in part on a distance between a current sub-block of a transform coefficient block and a sub-block that contains a last significant coefficient (LSC) of the transform coefficient block, coding contexts for significance flags for transform coefficients of the current sub-block. Furthermore, the video coder entropy codes, based on the coding contexts for the significance flags for the transform coefficients of the current sub-block, the significance flags for the transform coefficients of the current sub-block.
Abstract translation: 视频编码器至少部分地基于变换系数块的当前子块与包含变换系数块的最后有效系数（LSC）的子块之间的距离来确定用于显示标志的编码上下文 变换当前子块的系数。 此外，视频编码器基于当前子块的变换系数的有效标志的编码上下文，对当前子块的变换系数的有效标志进行熵编码。
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