Invention Grant
- Patent Title: Reference picture management and list construction
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Application No.: US16669385Application Date: 2019-10-30
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Publication No.: US11196988B2Publication Date: 2021-12-07
- Inventor: Alexandros Tourapis , Jungsun Kim , Krishnakanth Rapaka , David W. Singer
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: BakerHostetler
- Main IPC: H04N19/105
- IPC: H04N19/105 ; H04N19/172 ; H04N19/174 ; H04N19/184 ; H04N19/513 ; H04N19/70

Abstract:
Techniques for encoding video with motion compensation include a compressed bitstream syntax that includes a list of all motion prediction reference frames without distinguishing between short-term reference frame and long-term reference frames. The list of reference frames may be provided in a slice header and may apply to encoded data video data within the corresponding slice. The list may be prefaced with a single number indicating the total number of reference frames. In an aspect delta POC reference numbers may be encoded with a flag indicating the sign of the delta POC when the absolute value of the POC is not equal to zero. In another aspect, a flag may be encoded for every reference frame indicating if POC information should be used when scaling prediction references, and a weighting parameter may be included when POC information should be used.
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