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Restricting inter-layer prediction based on a maximum number of motion-compensated layers in high efficiency video coding (HEVC) extensions

專利號
US10097825B2
公開日期
2018-10-09
申請人
QUALCOMM Incorporated（US CA San Diego）
發(fā)明人
Vadim Seregin; Ye-Kui Wang; Ying Chen; Marta Karczewicz
IPC分類
H04N19/105; H04N19/139; H04N19/30; H04N19/187
技術領域
video,prediction,layer,motion,coding,in,may,inter,or,intra
地域： CA CA San Diego

摘要

A method of coding video data includes receiving video information associated with a first layer and a second layer and determining whether at least one of the first layer and the second layer is a default layer. The method can include at least partially restricting inter-layer prediction when neither the first layer nor the second layer is the default layer. A default layer can be a base layer or an enhancement layer. A flag can be received that indicates that inter-layer prediction is to be restricted. In addition, the method can include determining whether inter-layer prediction is allowed for the video information associated with the first layer, and determining whether inter-layer prediction is partially allowed for the video information associated with the second layer such that motion compensation is not used with the second layer video information.

說明書

For purposes of illustration, the techniques described in the disclosure are described using examples where there are only two layers. One layer can include a lower level layer or reference layer, and another layer can include a higher level layer or enhancement layer. For example, the reference layer can include a base layer or a temporal reference on an enhancement layer, and the enhancement layer can include an enhanced layer relative to the reference layer. It should be understood that the examples described in this disclosure extend to multiple enhancement layers as well.

FIG. 8 is a conceptual diagram illustrating an example of blocks in multiple layers in SVC. For example, FIG. 8 illustrates a base layer block 2 and an enhanced layer block 4, which may be co-located with one another such that the base layer block 2 can be located at a position in the base layer corresponding to the position of the enhanced layer block 4 in the enhancement layer.

Base layer block 2 includes sub-blocks 3A-3H, and enhanced layer block 4 includes sub-blocks 5A-5H. Each of sub-blocks 3A-3H may be co-located with each of sub-blocks 5A-5H, respectively. For example, each of sub-blocks 3A-3H may correspond to a respective one of sub-blocks 5A-5H. In some coders, the motion information from the top left sub-block (e.g., sub-block 3B) may be used to predict the motion information for enhanced layer block 4. However, this sub-block may be less optimal than other sub-blocks in some instances.

權利要求

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