Methods, computing systems, and computer programs for video decoding

Implicit masked blending with motion vector refinement improves video decoding accuracy by utilizing actual pixel data, addressing inaccuracies from reference blocks extending beyond boundaries.

JP2026524160APending Publication Date: 2026-07-21TENCENT AMERICA LLC
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
TENCENT AMERICA LLC
Filing Date
2023-09-08
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing video coding methods suffer from inaccurate predictions due to reference blocks extending beyond boundaries, leading to sub-optimal padding and reduced decoding accuracy.

Method used

Implementing implicit masked blending mode with motion vector refinement, using actual pixel data weighted more heavily to improve reconstruction accuracy and suppress artifacts.

Benefits of technology

Enhances coding accuracy by providing more accurate video decoding and reducing artifacts through refined motion vectors.

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Abstract

The computing system receives a video bitstream containing the current block and one or more syntax elements within the current picture. The current block is encoded in subblock-based motion vector (MV) refinement mode using information from a first reference block and a second reference block. The system applies MV refinement to generate a refined first MV indicating a first position in the first reference block and a refined second MV indicating a second position in the second reference block. After applying MV refinement, the system decodes the current block using a weighted average of the values ​​from the first and second positions, according to the determination that (i) the first position is outside the first reference boundary set and / or (ii) the second position is outside the second reference boundary set.
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