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Method for signaling virtual boundary signaling with subpictures in coded video stream

專利號
US11800096B2
公開日期
2023-10-24
申請人
TENCENT AMERICA LLC（US CA Palo Alto）
發(fā)明人
Byeongdoo Choi; Shan Liu; Stephan Wenger
IPC分類
H04N19/117; H04N19/82; H04N19/176; H04N19/132; H04N19/186
技術領域
picture,coded,in,video,sub,or,nal,pictures,be,syntax
地域： CA CA Palo Alto

摘要

A method, computer program, and computer system is provided for coding video data. Video data including one or more subpictures having one or more virtual boundaries is received. Information corresponding to the virtual boundaries is signaled in a picture parameter set, a picture header, or a slice header associated with the received video data. The video data is decoded based on the signaled information corresponding to the virtual boundaries.

說明書

Adaptive Resolution Change (ARC) henceforth refers to mechanisms that allow the change of resolution of a picture or sub-picture within a coded video sequence, by the means of, for example, reference picture resampling. ARC parameters henceforth refer to the control information required to perform adaptive resolution change, that may include, for example, filter parameters, scaling factors, resolutions of output and/or reference pictures, various control flags, and so forth.

Above description is focused on coding and decoding a single, semantically independent coded video picture. Before describing the implication of coding/decoding of multiple sub pictures with independent ARC parameters and its implied additional complexity, options for signaling ARC parameters shall be described.

Referring to FIG. 5, shown are several novel options for signaling ARC parameters. As noted with each of the options, they have certain advantages and certain disadvantages from a coding efficiency, complexity, and architecture viewpoint. A video coding standard or technology may choose one or more of these options, or options known from previous art, for signaling ARC parameters. The options may not be mutually exclusive, and conceivably may be interchanged based on application needs, standards technology involved, or encoder's choice.

Classes of ARC parameters may include:

    • up/downsample factors, separate or combined in X and Y dimension
    • up/downsample factors, with an addition of a temporal dimension, indicating constant speed zoom in/out for a given number of pictures

權利要求

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