公开(公告)号：US20160309149A1

公开(公告)日：2016-10-20

申请号：US15092434

申请日：2016-04-06

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Natan Haim Jacobson ,  Rajan Laxman Joshi

IPC: H04N19/124 ,  H04N19/129 ,  H04N19/184 ,  H04N19/176

CPC classification number: H04N19/124 ,  H04N19/129 ,  H04N19/14 ,  H04N19/176 ,  H04N19/184 ,  H04N19/46 ,  H04N19/61

Abstract: Techniques for quantization parameter (QP) for display stream compression (DSC) based on complexity measure are disclosed. In one aspect, a method for determining a QP value includes determining a complexity value of a plurality of previous blocks and selecting a technique from a plurality of defined techniques for calculating a QP adjustment value for a current block based on the determined complexity value. The method may further include calculating the QP adjustment value for the current block via the selected technique and determining the QP value for the current block based on the QP adjustment value.

Abstract translation: 公开了基于复杂度测量的用于显示流压缩（DSC）的量化参数（QP）技术。 一方面，用于确定QP值的方法包括确定多个先前块的复杂度值，并且根据所确定的复杂度值从多个定义的技术中选择用于计算当前块的QP调整值的技术。 该方法还可以包括经由所选择的技术计算当前块的QP调整值，并且基于QP调整值确定当前块的QP值。

公开(公告)号：US20160044317A1

公开(公告)日：2016-02-11

申请号：US14820404

申请日：2015-08-06

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Natan Haim Jacobson ,  Rajan Laxman Joshi

IPC: H04N19/152 ,  H04N19/176 ,  H04N19/119

CPC classification number: H04N19/152 ,  H04N19/119 ,  H04N19/124 ,  H04N19/174 ,  H04N19/176

Abstract: A system and method for display stream compression is disclosed. In one example, there is provided a method that includes coding a block within a slice of video data. The slice may comprise one or more blocks of the video data. The method further includes storing bits corresponding to the block in a buffer, determining information indicative of a position of the block within the slice, and determining fullness of the buffer based at least in part on the position of the block within the slice.

Abstract translation: 公开了用于显示流压缩的系统和方法。 在一个示例中，提供了一种方法，其包括对视频数据片段内的块进行编码。 切片可以包括视频数据的一个或多个块。 该方法还包括将对应于该块的比特存储在缓冲器中，确定指示切片内的块的位置的信息，以及至少部分地基于该切片内的块的位置确定该缓冲器的丰满度。

公开(公告)号：US10986360B2

公开(公告)日：2021-04-20

申请号：US16159458

申请日：2018-10-12

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Xiang Li ,  Nan Hu ,  Hsiao-Chiang Chuang ,  Marta Karczewicz

IPC: H04N19/537 ,  H04N19/543 ,  H04N19/513 ,  H04N19/46 ,  H04N19/44 ,  H04N19/56 ,  H04N19/70 ,  H04N19/577 ,  H04N19/52 ,  H04N19/85

Abstract: A device for video decoding may include a memory configured to store video data and a processor configured receive a bitstream including encoded video data. The processor may be configured to select a number of template matching (TM) candidates for a temporal layer or slice during the video decoding. The number of TM candidates selected are fixed prior to the video decoding, or adaptively calculated during the video decoding. The processor may be configured to generate a prediction block and residual block, based on a template matching candidate, to reconstruct the video data.

公开(公告)号：US10855989B2

公开(公告)日：2020-12-01

申请号：US15617844

申请日：2017-06-08

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Natan Haim Jacobson ,  Rajan Laxman Joshi

IPC: H04N19/00 ,  H04N19/157 ,  H04N19/11 ,  H04N19/593 ,  H04N19/423 ,  H04N19/184 ,  H04N19/127 ,  H04N19/146 ,  H04N19/159 ,  H04N19/176 ,  H04N19/169 ,  H04L29/06 ,  H04N19/147

Abstract: An apparatus configured to encode video data comprising a memory configured to store a block of video data and one or more processors in communication with the memory. The one or more processors are configured to determine a coding mode for encoding the block of video data from among one or more coding modes, wherein the coding mode is determined based on a maximum syntax element size, encode the block of video data in a plurality of substreams according to the determined coding mode to create a plurality of encoded substreams of video data, store the plurality of encoded substreams of video data in respective balance first-in, first-out (FIFO) buffers, and multiplex the plurality of encoded substreams in a bitstream for transmitting to a video decoder.

公开(公告)号：US10743032B2

公开(公告)日：2020-08-11

申请号：US15985809

申请日：2018-05-22

Applicant: QUALCOMM Incorporated

Inventor： Natan Haim Jacobson ,  Vijayaraghavan Thirumalai ,  Rajan Laxman Joshi

IPC: H04N19/70 ,  H04N19/103 ,  H04N19/146 ,  H04N19/152 ,  H04N19/119 ,  H04N19/176 ,  H04N19/169 ,  H04N19/46

Abstract: A method and system for encoding video data in a constant bit rate video encoder. A video encoder may determine a coding mode for encoding a block of video data from among one or more coding modes based on a minimum syntax element size and a maximum syntax element size, wherein the minimum syntax element size is greater than 1 bit, encode the block of video data in a plurality of substreams according to the determined coding mode to create a plurality of encoded substreams of video data, store the plurality of encoded substreams of video data in respective balance FIFO buffers, and multiplex the plurality of encoded substreams in a bitstream for transmitting to a decoder.

公开(公告)号：US10547854B2

公开(公告)日：2020-01-28

申请号：US15590261

申请日：2017-05-09

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Xin Zhao ,  Amir Said ,  Marta Karczewicz ,  Nan Hu ,  Wei-Jung Chien ,  Vijayaraghavan Thirumalai

IPC: H04N19/159 ,  H04N5/926 ,  H04N19/593 ,  H04N1/417 ,  H04N9/804 ,  H04N9/808

Abstract: A device for coding video data is configured to determine that a current block of video data is coded using an intra prediction mode; add an intra prediction mode of a first neighboring block of the current block to a most probable mode candidate list for the current block; add an intra prediction mode for a second neighboring block of the current block to the most probable mode candidate list for the current block; add an intra prediction mode for a third neighboring block of the current block to the most probable mode candidate list for the current block; and code the current block of video data using an intra prediction mode.

公开(公告)号：US10368073B2

公开(公告)日：2019-07-30

申请号：US15369723

申请日：2016-12-05

Applicant: QUALCOMM Incorporated

Inventor： Natan Haim Jacobson ,  Vijayaraghavan Thirumalai ,  Rajan Laxman Joshi

IPC: H04N19/176 ,  H04N19/137 ,  H04N19/513 ,  H04N19/105 ,  H04N19/119 ,  H04N19/147 ,  H04N19/593 ,  H04N19/174 ,  H04N19/182 ,  H04N19/184 ,  H04N19/436

Abstract: A method for coding a block of video data in simplified block prediction mode of a constant bitrate video coding scheme for transmission over display links is disclosed. In one aspect, the method includes determining a candidate block to be used to predict a current block in a current slice, the candidate block being within a range of pixel positions that each correspond to a reconstructed pixel in the current slice. The range of pixel positions may comprise (i) a first region including one or more first pixel positions in a first line of pixels that overlaps the current block, and (ii) a second region including one or more second pixel positions in a second line of pixels that does not overlap the current block. The method may further comprise determining and signaling a prediction vector indicative of a pixel position of the candidate block.

公开(公告)号：US10362310B2

公开(公告)日：2019-07-23

申请号：US15296998

申请日：2016-10-18

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Natan Haim Jacobson ,  Rajan Laxman Joshi

IPC: H04N7/12 ,  H04N19/13 ,  H04N19/124 ,  H04N19/132 ,  H04N19/15 ,  H04N19/46 ,  H04N19/50 ,  H04N19/625 ,  H04N19/119 ,  H04N19/122 ,  H04N19/182 ,  H04N19/436 ,  H04N19/176 ,  H04N19/186

Abstract: Provided are systems and methods for entropy encoding video data. Samples of a block of video data are partitioned into one or more groups of samples, based upon a coding mode of the block and a chroma subsampling image format of the samples. Entropy coding is performed on the block via performing a group-wise skip on at least one of the one or more groups in response to all of the samples in the at least one group having a value equal to a predetermined value, the group-wise skip including refraining from encoding the samples associated with the at least one group.

公开(公告)号：US10356428B2

公开(公告)日：2019-07-16

申请号：US15092407

申请日：2016-04-06

Applicant: QUALCOMM Incorporated

Inventor： Vijayaraghavan Thirumalai ,  Natan Haim Jacobson ,  Rajan Laxman Joshi

IPC: H04N19/196 ,  H04N19/176 ,  H04N19/16 ,  H04N19/137 ,  H04N19/152 ,  H04N19/124 ,  H04N19/184 ,  H04N19/136 ,  H04N19/14

Abstract: Quantization parameter (QP) update classification techniques for display stream compression (DSC) are disclosed. In one aspect, a method for determining a quantization parameter (QP) value includes determining whether a current block includes a transition from a flat region to a complex region or is a flat block and determining whether a previous block includes a transition from a flat region to a complex region or is a flat block. The method may also include selecting a default technique or an alternative technique for calculating a QP adjustment value for the current block based on whether the previous and current blocks include a transition from a flat region to a complex region or are flat blocks.

公开(公告)号：US20190110045A1

公开(公告)日：2019-04-11

申请号：US16154261

申请日：2018-10-08

Applicant: QUALCOMM Incorporated

Inventor： Xin Zhao ,  Vadim Seregin ,  Amir Said ,  Marta Karczewicz ,  Kai Zhang ,  Vijayaraghavan Thirumalai

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/117

Abstract: A video coder may generate a predictor block using an intra prediction mode. As part of generating the predictor block, the video coder may, for each respective sample in a set of samples in the predictor block, determine, based on an initial value of the first weight and a distance between the respective sample and a first boundary of the predictor block, a value of the first weight for the respective sample. Additionally, the video coder may determine, based on the initial value of the second weight and a distance between the respective sample and a second boundary of the predictor block, a value of the second weight for the respective sample. The video coder may also determine a primary value for the respective sample. The video coder may then determine a secondary value for the respective sample based on the first weight, second weight, and the primary value.