Cross component sample offset filtering with interpolated filter taps

By employing a CCSO filter with fractional tap positions and an interpolation filter to generate sample offsets, the challenges of CCSO filtering in video coding are addressed, resulting in enhanced video quality and compression efficiency.

WO2025048867A1PCT designated stage expired Publication Date: 2025-03-06TENCENT AMERICA LLC
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Patent Information

Application Number
PCT/US2023/081874
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-11-29
Filing Date
2023-11-30
Publication Date
2025-03-06

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Abstract

This disclosure generally describes a set of advanced video coding technologies, and is specifically related to cross-component sample offset (CCSO) filtering. For example, a CCSO filter having fractional CCSO filtering tap positions may be used to generate sample offsets from one color component of a reconstructed video. The sample offsets may then be applied to a second color component of the reconstructed video. The reconstructed samples of the first color component may first be interpolated by an interpolation filter in order to generate interpolated samples of the first color component at the fractional CCSO tap positions. The interpolated samples may be used as input to the CCSO filter for the generation of the sample offsets.
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Citation Information

Patent Citations

  • Cross-component adaptive loop filter

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  • Sample Offset with Predefined Filters

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  • Adaptive Non-Linear Mapping for Sample Offset

    US20230224503A1

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