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Video decoding method, device, and computer-readable storage medium

A technology for video decoding and usability, applied in the field of video coding, which can solve the problems of lossy MV prediction and lossy rounding error.

Active Publication Date: 2021-12-24
TENCENT AMERICA LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other cases, the MV prediction itself may be lossy, for example, lossy due to rounding errors when computing the prediction from several surrounding MVs

Method used

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  • Video decoding method, device, and computer-readable storage medium
  • Video decoding method, device, and computer-readable storage medium
  • Video decoding method, device, and computer-readable storage medium

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Experimental program
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Embodiment Construction

[0087] Various MV prediction mechanisms are described in H.265 / HEVC (ITU-T Recommendation H.265, "High Efficiency Video Coding", December 2016). Among the various MV prediction mechanisms provided by H.265, described in this application is a technique hereinafter referred to as "spatial merging".

[0088] Please refer to figure 1 , the current block (101) comprises samples that have been found by the encoder during the motion search process, which samples can be predicted from previous blocks of the same size for which spatial offsets have been generated. Additionally, the MV may be derived from metadata associated with one or more reference pictures, rather than encoding the MV directly. For example, using the MV associated to any of the five surrounding samples A0, A1 and B0, B1, B2 (102 to 106 respectively), the MV is derived (in decoding order) from the metadata of the nearest reference picture. MV. In H.265, MV prediction can use the predictor of the same reference pi...

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PUM

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Abstract

In some embodiments, an apparatus for video encoding includes processing circuitry. The processing circuit is configured to receive a current block of a current picture. The current block has a width and a height. The processing circuit is further configured to determine whether one of the right edge and the bottom edge of a co-located block of the current block can be used according to the width and / or the height of the current block in the current picture and in response to determining that the first temporal motion candidate block can be used, verifying the one of the right edge and the bottom edge of the co-located block of the current block Availability of the first temporal motion candidate block at the edge. The processing circuit is further configured to add the first temporal motion candidate block to a motion candidate block list when the first temporal motion candidate block is available.

Description

[0001] Incorporate by reference [0002] This application claims U.S. Provisional Application No. 62 / 668,779, "Methods for Merge and MotionVector Prediction Temporal Candidate List for Inter-Picture Prediction" filed May 8, 2018 -Picture Prediction), and U.S. Formal Application No. 16 / 218,187, filed December 12, 2018, the disclosures of which are incorporated herein by reference in their entirety. technical field [0003] The present disclosure relates to video coding techniques. Background technique [0004] When performing video encoding and decoding, inter-picture prediction may be used in conjunction with motion compensation. In uncompressed digital video, a series of pictures may be included, each picture having a spatial dimension of eg 1920x1080 luma samples and associated chrominance samples. Also, the pictures may have a fixed or variable frame rate of eg 60 pictures per second (or 60 Hz). In addition, uncompressed video has significant bit rate requirements. F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/42H04N19/44H04N19/176H04N19/51H04N19/70H04N19/577H04N19/593H04N19/91
CPCH04N19/42H04N19/44H04N19/176H04N19/51H04N19/70H04N19/577H04N19/593H04N19/91H04N19/119H04N19/52H04N19/105
Inventor 李贵春许晓中刘杉李翔
Owner TENCENT AMERICA LLC