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

專利號(hào)
US11800096B2
公開日期
2023-10-24
申請(qǐng)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(shù)領(lǐng)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

In the same or other embodiments, even though the value of POC of a picture, slice, or tile may be different, the picture, slice, or tile corresponding to an AU with the same AUC value may be associated with the same composition/display time instance. When the composition time is contained in a container format, even though pictures correspond to different AUs, if the pictures have the same composition time, the pictures can be displayed at the same time instance.

In the same or other embodiments, each picture, slice, or tile may have the same temporal identifier (temporal_id) in the same AU. All or subset of pictures, slices or tiles corresponding to a time instance may be associated with the same temporal sub-layer. In the same or other embodiments, each picture, slice, or tile may have the same or a different spatial layer id (layer_id) in the same AU. All or subset of pictures, slices or tiles corresponding to a time instance may be associated with the same or a different spatial layer.

FIG. 11 shows an example video stream including a background video CSPS with layer_id equal to 0 and multiple foreground CSPS layers. While a coded sub-picture may consist of one or more CSPS layers, a background region, which does not belong to any foreground CSPS layer, may consist of a base layer. The base layer may contain a background region and foreground regions, while an enhancement CSPS layer contain a foreground region. An enhancement CSPS layer may have a better visual quality than the base layer, at the same region. The enhancement CSPS layer may reference the reconstructed pixels and the motion vectors of the base layer, corresponding to the same region.

權(quán)利要求

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