公开(公告)号：US20210352330A1

公开(公告)日：2021-11-11

申请号：US17314959

申请日：2021-05-07

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Yong He ,  Yao-Jen Chang ,  Muhammed Zeyd Coban

IPC: H04N19/70 ,  H04N19/184 ,  H04N19/172 ,  H04N19/105 ,  H04N19/174 ,  H04N19/30

Abstract: Example techniques and devices for decoding video data are disclosed. An example device includes memory configured to store the video data and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to extract a current sub-picture from a bitstream of the video data and parse virtual boundary syntax elements indicative of virtual boundaries for a current picture, wherein the current sub-picture is associated with the current picture. The one or more processors are configured to update the virtual boundaries based at least in part on the virtual boundary syntax elements and decode the current sub-picture based on the updated virtual boundaries.

公开(公告)号：US11159822B2

公开(公告)日：2021-10-26

申请号：US16924993

申请日：2020-07-09

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Vadim Seregin

IPC: H04N19/593 ,  H04N19/119 ,  H04N19/174 ,  H04N19/176 ,  H04N19/11

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：US11153583B2

公开(公告)日：2021-10-19

申请号：US16892709

申请日：2020-06-04

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Muhammed Zeyd Coban ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/39 ,  H04N19/107 ,  H04N19/70 ,  H04N19/61 ,  H04N19/187

Abstract: A video encoder or video decoder can be configured to obtain multi-layer video data that includes at least a first layer and a second layer; determine a layer identification value for the first layer and a layer identification value for the second layer, wherein the layer identification value for the second layer is higher than the layer identification value for the first layer; store decoded pictures of the first layer and decoded pictures of the second layer in a decoded picture buffer; and in response to determining that a picture of a layer is an instantaneous decoding refresh (IDR) picture, remove from the decoded picture buffer, all decoded pictures of a layer the IDR picture belongs to, while leaving in the decoded picture buffer all decoded pictures with layer identifications lower than a layer identification of the layer the IDR picture belongs to.

公开(公告)号：US20210297704A1

公开(公告)日：2021-09-23

申请号：US17197790

申请日：2021-03-10

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Yong He ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Marta Karczewicz

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

Abstract: A method of decoding video data, the method comprising: obtaining, from a bitstream that comprises an encoded representation of the video data, a first syntax element indicating a number of subpictures in each picture in a coded layer video sequence (CLVS); based on the first syntax element indicating that the number of subpictures in each picture in the CLVS is greater than 1, obtaining, from the bitstream, a second syntax element that specifies whether all subpicture boundaries in the CLVS are treated as picture boundaries; and based on the second syntax element specifying that all subpicture boundaries in the CLVS are treated as picture boundaries, decoding each subpicture in each of the pictures in the CLVS as a separate picture.

公开(公告)号：US20210297655A1

公开(公告)日：2021-09-23

申请号：US17205578

申请日：2021-03-18

Applicant: QUALCOMM Incorporated

Inventor： Yong He ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/70 ,  H04N19/172 ,  H04N19/169 ,  H04N19/176 ,  H04N5/40

Abstract: A video encoder maintains a first reference picture list; maintains a second reference picture list; determines that a picture is an instantaneous decoding refresh (IDR) picture; determines that reference picture list syntax elements are present in a slice header for the IDR picture; and in response to determining that the picture is the IDR picture and that the reference picture list syntax elements are present in the slice header for the IDR picture, updates the first reference picture list and the second reference picture list such that no picture in the first reference picture list and no picture in the second reference picture list precedes, in output order or decoding order, any preceding instant random access point (IRAP) picture in decoding order.

公开(公告)号：US11128866B2

公开(公告)日：2021-09-21

申请号：US16655950

申请日：2019-10-17

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Muhammed Zeyd Coban

IPC: H04N19/132 ,  H04N19/61 ,  H04N19/18 ,  H04N19/44 ,  H04N19/70 ,  H04N19/129

Abstract: A method of decoding video data including determining a first region of a transform unit in which transform coefficients are subject to zero-out, determining a second region of the transform unit in which transform coefficients are not subject to zero-out, and scanning only the second region of the transform unit.

公开(公告)号：US20210266601A1

公开(公告)日：2021-08-26

申请号：US17182583

申请日：2021-02-23

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Muhammed Zeyd Coban

IPC: H04N19/70 ,  H04N19/46 ,  H04N19/159 ,  H04N19/174

Abstract: An example device includes 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 picture of the video data is an intra random access picture (IRAP) and determine whether all layers of the picture are independent. Based on the picture being an IRAP and all layers of the picture being independent, the one or more processors are configured to determine a value of a first syntax element to be indicative of an inter slice not being allowed in the picture and code the picture without using inter slice prediction.

公开(公告)号：US20210195223A1

公开(公告)日：2021-06-24

申请号：US17125225

申请日：2020-12-17

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban

IPC: H04N19/187 ,  H04N19/176 ,  H04N19/137 ,  H04N19/70 ,  H04N19/51 ,  H04N19/172

Abstract: A video decoder can be configured to determine that a first subpicture of a current picture has associated scaling parameters; receive the associated scaling parameters for the first subpicture of the current picture in response to determining that the first subpicture of the current picture has the associated scaling parameters; determine motion information, for a block of the first subpicture of the current picture, that identifies a subpicture of a reference picture; locate a prediction block for the block of the first subpicture of the current picture in the subpicture of the reference picture; and scale the prediction block based on the associated scaling parameters for the first subpicture of the current picture.

公开(公告)号：US20210176468A1

公开(公告)日：2021-06-10

申请号：US17109958

申请日：2020-12-02

Applicant: QUALCOMM Incorporated

Inventor： Alican Nalci ,  Hongtao Wang ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/12 ,  H04N19/14 ,  H04N19/196 ,  H04N19/13 ,  H04N19/61 ,  H04N19/176 ,  H04N19/103

Abstract: A video coder may determine a quantization parameter (QP) value for a block of video data, determine a residual coding method from a plurality of residual coding methods based on the QP value, wherein the plurality of residual coding methods include transform skip (TS) residual coding and regular residual coding, and code a residual of the block of video data using the determined residual coding method.

公开(公告)号：US20210092406A1

公开(公告)日：2021-03-25

申请号：US17027384

申请日：2020-09-21

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Muhammed Zeyd Coban

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/46 ,  H04N19/176

Abstract: An example of encoding video data includes determining a number of actual dependent layers of video data for a current layer, the actual dependent layers being a subset of layers having a layer identification value less than a layer identification value of the current layer, the actual dependent layers being available for inter-layer coding a block in a current picture in the current layer, wherein the number of actual dependent layers is fewer than a number of layers having the layer identification value less than the layer identification value of the current layer, determining a layer, other than the current layer, that includes an inter-layer reference picture for inter-predicting the block in the current picture in the current layer, and signaling information indicative of a layer index value to identify the layer other than the current layer based on the determined number of actual dependent layers for the current layer.