公开(公告)号：US20210076074A1

公开(公告)日：2021-03-11

申请号：US17014492

申请日：2020-09-08

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Muhammed Zeyd Coban ,  Vadim Seregin ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/186 ,  H04N19/96

Abstract: An example device for coding video data codes, in a parameter set, a first syntax element indicative of a luma coding tree block size of coding tree units (CTUs) to which the parameter set is applicable minus 5. The device codes, in the parameter set, a second syntax element indicative of a minimum luma coding block size minus 2 of luma coding blocks to which the parameter set is applicable, wherein a value of the second syntax element is in a range of 0 to a value based on the first syntax element, inclusive. The device codes the luma coding blocks to which the parameter set is applicable in accordance with the first syntax element and the second syntax element in the parameter set.

公开(公告)号：US20210076072A1

公开(公告)日：2021-03-11

申请号：US16948084

申请日：2020-09-02

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/119 ,  H04N19/103 ,  H04N19/174 ,  H04N19/157

Abstract: An example device includes a memory configured to store video data and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine whether a maximum number of merge candidates for a slice of the video data is equal to a first value. The one or more processors are configured to infer a value of a first syntax element to be equal to a second value based at least in part on the maximum number of merge candidates for the slice being equal to the first value, the first syntax element being indicative of a maximum number of merge candidates and a maximum number of merge candidates of a non-rectangular coding mode. The one or more processors are also configured to decode the slice based on the maximum number of merge candidates and the first syntax element.

公开(公告)号：US20210058640A1

公开(公告)日：2021-02-25

申请号：US17000034

申请日：2020-08-21

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Hongtao Wang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/176

Abstract: A device for coding video data is configured to code a motion vector difference (MVD) value using a codeword prefix and a codeword suffix. Based on an absolute value, minus 2, of the MVD value being 131070 or greater, the codeword prefix of the MVD value is equal to 1111 1111 1111 1111 and the codeword suffix is coded using the fixed length code.

公开(公告)号：US20210014529A1

公开(公告)日：2021-01-14

申请号：US16924993

申请日：2020-07-09

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Vadim Seregin

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/174 ,  H04N19/119

Abstract: An example device for coding (encoding or decoding) video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: code data representing a location of a virtual boundary defining a clean side of a picture of video data and a dirty side of the picture; disable use of blocks on the dirty side for intra-prediction reference of blocks on the clean side; and code the picture without using the blocks on the dirty side for intra-prediction reference of the blocks on the clean side.

公开(公告)号：US10779006B2

公开(公告)日：2020-09-15

申请号：US16274674

申请日：2019-02-13

Applicant: QUALCOMM Incorporated

Inventor： Fnu Hendry ,  Muhammed Zeyd Coban ,  Geert Van der Auwera ,  Marta Karczewicz

IPC: H04N19/184 ,  H04N19/70 ,  H04N19/136 ,  H04N19/597

Abstract: This disclosure describes techniques for signaling 360-degree video information in syntax structures. As one example, this disclosure describes examples for signaling projection types and related information for 360-degree video in syntax structures that include one or more syntax elements. In some examples, the same syntax structures may include non-360-degree video information as well. Accordingly, the syntax structure may be used for encoding and decoding a bitstream carrying only non-360-degree video data, only 360-degree video data, or both non-360-degree video data and 360-degree video data.

公开(公告)号：US20200213623A1

公开(公告)日：2020-07-02

申请号：US16732008

申请日：2019-12-31

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/13 ,  H04N19/46 ,  H04N19/117 ,  H04N19/176

Abstract: As part of bypass decoding syntax elements for a set of coefficients in response to reaching a maximum number of regular coded bins, a video decoder is configured to receive a prefix value for a transform coefficient; decode the prefix value using Golomb-Rice coding; in response to a length of the prefix value being equal to a threshold value, receive a suffix value for the transform coefficient; decode the suffix value using exponential Golomb coding; and determine a level value for the transform coefficient based on the decoded prefix value and the decoded suffix value.

公开(公告)号：US20190387259A1

公开(公告)日：2019-12-19

申请号：US16416815

申请日：2019-05-20

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Marta Karczewicz ,  Jie Dong

IPC: H04N21/2383 ,  H04L1/00 ,  H03M13/25

Abstract: An example device includes processing circuitry configured to determine a first state of a data structure, the first state representing a first quantizer applied to a previously quantized or inverse quantized value of a previous transform coefficient of residual data for a block of the video data and update the data structure to a second state according to the first state and a parity of a partial set of syntax elements representing a partial set of a plurality of coefficient levels for the previous transform coefficient. The processing circuitry is further configured to determine a second quantizer to be used to quantize or inverse quantize a current value of a current transform coefficient according to the second state of the data structure and quantize or inverse quantize the current value of the current transform coefficient using the second quantizer.

公开(公告)号：US10382791B2

公开(公告)日：2019-08-13

申请号：US14724108

申请日：2015-05-28

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Chengjie Tu ,  Xianglin Wang ,  Muhammed Zeyd Coban

IPC: H04N19/52 ,  H04N19/70 ,  H04N19/423 ,  H04N19/463 ,  H04N19/593

Abstract: The disclosure provides a system and methods for encoding video data. The method can include storing a data structure in a memory, the data structure having a first plurality of data elements arranged corresponding to a second plurality of data elements of a first video data block, and defining a periphery, the data structure further including data related to all of a smallest prediction unit (PU) for the first video data block. The method can also include increasing a size of the data structure in the memory by adding a plurality of extended units along the periphery of the first plurality of data elements, each extended unit having data related to a smallest data element of the first video data block, the extended units being set to default values. The method can also comprise encoding the first video data block based on the data structure.

公开(公告)号：US20190098301A1

公开(公告)日：2019-03-28

申请号：US16141714

申请日：2018-09-25

Applicant: QUALCOMM Incorporated

Inventor： Sungwon Lee ,  Wei-Jung Chien ,  Adarsh Krishnan Ramasubramonian ,  Muhammed Zeyd Coban ,  Jianle Chen ,  Yi-Wen Chen ,  Marta Karczewicz

IPC: H04N19/114 ,  H04N19/159 ,  H04N19/70

Abstract: A device for encoding video data includes a memory configured to store video data, and a video encoder implemented in circuitry and configured to encode a future picture of the video data having a first display order position, the future picture being included in an intra period (IP) of the video data, the IP comprising a plurality of groups of pictures (GOPs), and after encoding the future picture, encode a picture of an ordinal first GOP of the plurality of GOPs using the future picture as a reference picture, each picture of the ordinal first GOP having display order positions earlier than the first display order position. Encoding the future picture in this manner may result in encoding performance improvements with minimal increases in encoding and decoding complexity.

公开(公告)号：US09628789B2

公开(公告)日：2017-04-18

申请号：US13678334

申请日：2012-11-15

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/50 ,  H04N19/70 ,  H04N19/11 ,  H04N19/463

CPC classification number: H04N19/50 ,  H04N19/11 ,  H04N19/463 ,  H04N19/70

Abstract: A video coder can determine a first most probable intra prediction mode and a second most probable intra prediction mode for a current video block, and based on the first and second most probable intra prediction modes, determine an estimate of an actual intra prediction mode used to code the current video block. The estimate of the actual intra prediction mode can be determined by selecting one of the first most probable mode and the second most probable mode as the estimate of the actual intra prediction in response to both the first most probable mode and the second most probable mode being different angular prediction modes. The estimate of the actual intra prediction mode plus difference information can be used to identify the actual intra prediction mode used to code the current video block.