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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(shù)領(lǐng)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

In addition to motion information, the techniques described in the disclosure can apply to other type of information (e.g., other non-image information), including an intra-prediction mode, where intra-prediction mode of the co-located base layer block may be inherited and used to predict the corresponding intra-perdition mode of the enhanced layer block. The corresponding locations may be signaled at LCU/CU/PU level or header, such as slice, sequence, picture headers.

In some embodiments, a video encoder may receive non-downsampled, non-image information for a lower level layer block, and perform functions in accordance with one or more embodiments described in this disclosure. In addition, the video encoder can downsample non-image information of the base layer block.

FIG. 9 illustrates an example method 900 for coding video data according to an example embodiment in which the maximum number of motion-compensated layers that may be used for inter-layer prediction is one. In this example, the one reference layer that may be used for inter-layer prediction may be referred to as a default layer. In another example, there can be more than one default layer. The method 900 can be performed by one or more components of video encoder 20 or video decoder 30, for example. In some embodiments, other components may be used to implement one or more of the steps described herein.

At block 902, video information regarding a first layer can be obtained or received from a memory. The video information can include a first block from a first video layer.

At block 904, video information regarding a second layer can be obtained or received from a memory. The video information can include a second block from a second video layer.

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