Video coding extrapolation intra prediction model inheritance candidate rearrangement method and apparatus

By reordering the EIP candidate list by calculating the model error of neighboring templates in the video codec system, the problem of improving the performance of EIP mode in the prior art is solved, and more efficient codec effect is achieved.

CN122162379APending Publication Date: 2026-06-05MEDIATEK INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MEDIATEK INC
Filing Date
2024-10-12
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing video coding and decoding technologies have room for performance improvement when using extrapolation intra-prediction mode, especially in multi-functional video coding and decoding standards, where it is difficult to efficiently select and reorder the EIP candidate list to improve coding and decoding efficiency.

Method used

The candidate EIP list is reordered by calculating the model error of neighboring templates, and a target EIP candidate is selected to generate the predictor for the current block. This candidate EIP list information, including the subsampling positions of neighboring templates and the precision control of model parameters, is used during encoding or decoding.

Benefits of technology

It improves the performance of video encoding and decoding systems, enhances the efficiency and quality of EIP mode encoding and decoding, and reduces redundancy and errors in the encoding process.

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Abstract

A method and apparatus for video coding using extrapolation intra prediction (EIP) related modes are disclosed. According to the method, an EIP candidate list including one or more EIP candidates is derived. The EIP candidates in the EIP candidate list are reordered according to model error, wherein the calculation of the model error includes deriving prediction samples of a neighboring template of a current block by applying one or more candidate models associated with the one or more EIP candidates to the neighboring template, comparing the difference between the reconstructed samples and the prediction samples of the neighboring template, and wherein deriving the prediction samples of the neighboring template, comparing the difference, or both are performed in a simplified manner. The current block is encoded or decoded using information containing the EIP candidate list.
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