公开(公告)号：US10103843B1

公开(公告)日：2018-10-16

申请号：US15836309

申请日：2017-12-08

Applicant: QUALCOMM Incorporated

Inventor： Cunzhen Liu ,  Alessandro Risso ,  Li Zhang

IPC: H04L1/00 ,  H03M13/27

Abstract: In an aspect, a method of encoding data for transmission includes reading, for a block of encoded data on which interleaving and rate-matching is to be performed, the block of encoded data from a buffer, by first and second interleaving and rate matching engines operating in parallel and, starting at first and second starting points of the buffer, respectively. Encoded output data includes the interleaved and rate matched data from both engines. In another aspect, a method of decoding received data includes reading data of a log likelihood ratio (LLR) buffer, by first and second de-interleaving and de-rate matching engines, starting at first and second starting points of the LLR buffer, respectively. Decoded output data includes de-interleaved and de-rate matched data of both engines.

公开(公告)号：US20180241992A1

公开(公告)日：2018-08-23

申请号：US15895815

申请日：2018-02-13

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Hongbin Liu ,  Ying Chen

IPC: H04N19/107 ,  H04N19/159 ,  H04N19/70 ,  H04N19/182 ,  H04N19/463 ,  H04N19/597 ,  H04N19/91

CPC classification number: H04N19/107 ,  H04N19/159 ,  H04N19/182 ,  H04N19/463 ,  H04N19/597 ,  H04N19/70 ,  H04N19/91

Abstract: This disclosure describes techniques for signaling and processing information indicating simplified depth coding (SDC) for depth intra-prediction and depth inter-prediction modes in a 3D video coding process, such as a process defined by the 3D-HEVC extension to HEVC. In some examples, the disclosure describes techniques for unifying the signaling of SDC for depth intra-prediction and depth inter-prediction modes in 3D video coding. The signaling of SDC can be unified so that a video encoder or video decoder uses the same syntax element for signaling SDC for both the depth intra-prediction mode and the depth inter-prediction mode. Also, in some examples, a video coder may signal and/or process a residual value generated in the SDC mode using the same syntax structure, or same type of syntax structure, for both the depth intra-prediction mode and depth inter-prediction mode.

公开(公告)号：US10057578B2

公开(公告)日：2018-08-21

申请号：US14876594

申请日：2015-10-06

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Li Zhang ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N19/124 ,  H04N19/186 ,  H04N19/44 ,  H04N19/18 ,  H04N19/176 ,  H04N19/60 ,  H04N19/12

Abstract: A device for decoding video data is configured to determine, based on a chroma sampling format for the video data, that adaptive color transform is enabled for one or more blocks of the video data; determine a quantization parameter for the one or more blocks based on determining that the adaptive color transform is enabled; and dequantize transform coefficients based on the determined quantization parameter. A device for decoding video data is configured to determine for one or more blocks of the video data that adaptive color transform is enabled; receive in a picture parameter set, one or more offset values in response to adaptive color transform being enabled; determine a quantization parameter for a first color component of a first color space based on a first of the one or more offset values; and dequantize transform coefficients based on the quantization parameter.

公开(公告)号：US20180176594A1

公开(公告)日：2018-06-21

申请号：US15845484

申请日：2017-12-18

Applicant: QUALCOMM Incorporated

Inventor： Kai Zhang ,  Jianle Chen ,  Li Zhang ,  Marta Karczewicz

IPC: H04N19/59 ,  H04N19/176 ,  H04N19/186

Abstract: Techniques are described of linear model (LM) prediction mode. In one or examples, a video encoder or video decoder may limit the number of neighboring luma samples that are fetched for downsampling thereby increasing the speed at which the video encoder or video decoder is able to complete the LM prediction encoding or decoding.

公开(公告)号：US20180176563A1

公开(公告)日：2018-06-21

申请号：US15848803

申请日：2017-12-20

Applicant: QUALCOMM Incorporated

Inventor： Xin Zhao ,  Vadim Seregin ,  Li Zhang ,  Marta Karczewicz ,  Amir Said

IPC: H04N19/122 ,  H04N19/105 ,  H04N19/18 ,  H04N19/176

Abstract: Sign prediction technology for video coding are generally described. An example device includes a memory configured to store video data, and processing circuitry in communication with the memory. The processing circuitry is configured to determine that a block of the video data stored to the memory is eligible to be coded using sign prediction, to perform the sign prediction with respect to one or more transform coefficients of the block only if the block meets a predetermined criterion, wherein the predetermined criterion is based on at least one of: a width of the block, a height of the block, a coding mode used to code the block, or a position of one or more sign-predicted transform coefficients within the block, and to code the block based on the sign prediction performed with respect to the block.

公开(公告)号：US20180176556A1

公开(公告)日：2018-06-21

申请号：US15848759

申请日：2017-12-20

Applicant: QUALCOMM Incorporated

Inventor： Xin Zhao ,  Vadim Seregin ,  Li Zhang ,  Marta Karczewicz ,  Amir Said

IPC: H04N19/105 ,  H04N19/126 ,  H04N19/176 ,  H04N19/18

CPC classification number: H04N19/105 ,  H04N19/122 ,  H04N19/124 ,  H04N19/126 ,  H04N19/129 ,  H04N19/13 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/51 ,  H04N19/593 ,  H04N19/619

Abstract: A device includes processing circuitry configured to identify a set of pre-stored residual samples in video data that is stored to a memory, to combine the set of stored residual samples to form a combination, to apply a first sign combination to transform coefficients of the combination to obtain a first hypothesis reconstruction for a current block of the video data, and to apply a second sign combination to the transform coefficients of the combination to obtain a second hypothesis reconstruction for the current block. The processing circuitry is further configured to derive respective cost functions with respect to the first and second hypothesis reconstructions, to compare the respective derived cost functions, to select, based on the comparison, either the first or second hypothesis reconstruction, and to code the current block using a sign prediction associated with the selected one of the first or second hypothesis reconstruction.

公开(公告)号：US09998727B2

公开(公告)日：2018-06-12

申请号：US14029696

申请日：2013-09-17

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Ying Chen ,  Xiang Li ,  Marta Karczewicz

IPC: H04N13/00 ,  H04N19/597 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/463 ,  H04N19/70 ,  H04N19/147

CPC classification number: H04N13/161 ,  H04N19/105 ,  H04N19/139 ,  H04N19/147 ,  H04N19/176 ,  H04N19/463 ,  H04N19/513 ,  H04N19/597 ,  H04N19/70

Abstract: Systems and methods for coding video information for a current view based on a residual prediction from video information for a reference view are described. In one innovative aspect, an apparatus for coding digital video is provided. The apparatus includes a memory configured to store current view video information and reference view video information. The apparatus also includes a processor configured to determine a value of a current video unit of the current view based at least on a motion compensated block of the reference view. The motion compensated block may be determined based at least in part on motion information and a disparity vector associated with the current video unit. Decoding devices and methods as well as corresponding encoding devices and methods are described.

公开(公告)号：US20180146211A1

公开(公告)日：2018-05-24

申请号：US15874565

申请日：2018-01-18

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Xiang Li ,  Wei-Jung Chien ,  Jianle Chen ,  Xin Zhao ,  Marta Karczewicz

IPC: H04N19/587 ,  H04N19/593 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176 ,  H04N19/44

CPC classification number: H04N19/587 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/593

Abstract: A device for decoding video data determines that a current block of video data is coded using a linear model prediction mode; for the luma component of the current block, determines reconstructed luma samples; based on luma samples in a luma component of one or more already decoded neighboring blocks and chroma samples in a chroma component of the one or more already decoded neighboring blocks, determines values for linear parameters, wherein the luma samples in the luma component of the one or more already decoded neighboring blocks comprise luma samples from a starting line in the luma component of the one or more already decoded neighboring blocks, wherein the starting line in the luma component of the one or more already decoded neighboring blocks is at least one line removed from a border line of the luma component of the current block.

公开(公告)号：US20180098089A1

公开(公告)日：2018-04-05

申请号：US15724044

申请日：2017-10-03

Applicant: QUALCOMM Incorporated

Inventor： Jianle Chen ,  Wei-Jung Chien ,  Xiang Li ,  Li Zhang ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/70 ,  H04N19/523

CPC classification number: H04N19/521 ,  H04N19/102 ,  H04N19/13 ,  H04N19/136 ,  H04N19/157 ,  H04N19/52 ,  H04N19/523 ,  H04N19/70

Abstract: A method of decoding video data, including receiving an encoded block of video data that was encoded using an inter-prediction mode, receiving one or more syntax elements indicating a motion vector difference (MVD) associated with the encoded block of video data, determining a current MVD precision, from three or more MVD precisions, for the one or more syntax elements indicating the MVD, wherein the three or more MVD precisions include an N-sample MVD precision, where N is an integer indicating a number of samples indicated by each successive codeword of the one or more syntax elements indicating the MVD, and wherein N is greater than 1, decoding the one or more syntax elements indicating the MVD using the determined current MVD precision, and decoding the encoded block of video data using the decoded MVD.

公开(公告)号：US20180098081A1

公开(公告)日：2018-04-05

申请号：US15719202

申请日：2017-09-28

Applicant: QUALCOMM Incorporated

Inventor： Xin Zhao ,  Li Zhang ,  Jianle Chen ,  Vadim Seregin ,  Xiang Li ,  Marta Karczewicz

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/61 ,  H04N19/137

CPC classification number: H04N19/45 ,  H04N19/12 ,  H04N19/136 ,  H04N19/137 ,  H04N19/14 ,  H04N19/157 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61 ,  H04N19/82 ,  H04N19/96

Abstract: A device for video coding is configured to determine a characteristic of a predictive block of a current block of a current picture; identify a transform for decoding the current block based on the characteristic; inverse transform coefficients to determine a residual block for the current block; and add the residual block to a predictive block of the current block to decode the current block.