公开(公告)号：US20240114128A1

公开(公告)日：2024-04-04

申请号：US18526481

申请日：2023-12-01

Applicant: Apple Inc.

Inventor： Alexandros TOURAPIS ,  Jungsun KIM ,  Krishnakanth RAPAKA ,  David William SINGER

IPC: H04N19/105 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/513 ,  H04N19/70

CPC classification number: 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.

公开(公告)号：US20250063182A1

公开(公告)日：2025-02-20

申请号：US18772408

申请日：2024-07-15

Applicant: APPLE INC.

Inventor： Alexandros TOURAPIS ,  Dimitri PODBORSKI ,  Jungsun KIM ,  Leo BARNES ,  Davide CONCION

IPC: H04N19/30 ,  H04N19/186 ,  H04N19/59

Abstract: Techniques are disclosed for representing video and images with full resolution color component information and yet remain compatible with legacy processing systems that process images with reduced resolution information. The new image representation may include a scalable format that consists of a base layer, coded to match expectations of a legacy coder. The new image representation also may include additional enhancement layer(s) that enable upconversions of reduced-resolution color components to higher resolutions. The image representation not only provides power savings in decoding full-resolution representations but it also provides other benefits, such as scalable and power aware decoding.