Methods and apparatus of video coding using improved matrix-based intra prediction coding mode

US12170763B2 · kind B2 · utility

Assignee

• BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD. · CN

Inventors

• Tsung-Chuan MA · San Diego, US
• Xianglin Wang · Santa Ana, US
• Yi-Wen Chen · San Diego, US
• Xiaoyu Xiu · San Diego, US
• Hong-Jheng JHU · Beijing, CN
• Shuiming Ye · San Diego, US
• Yun Zheng · Beijing, CN

Key dates

• Filing date: Oct 11, 2021
• Grant date: Dec 17, 2024
• Expiry date: Apr 24, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/593
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An electronic apparatus performs a method of updating a most probable modes candidate list for a current block of video data. The electronic apparatus first identifies a neighboring block located at a predefined location relative to the current block and its associated matrix-based intra prediction mode. Next, the electronic apparatus determines a regular intra prediction mode corresponding to the matrix-based intra prediction mode for the neighboring block according to a predefined mathematical relationship between regular intra prediction modes and matrix-based intra prediction modes. Finally, the electronic apparatus inserts the regular intra prediction mode associated with the neighboring block into the most probable modes candidate list according to a predefined order. If the regular intra prediction mode is signaled in the syntax of a video bitstream including the current block, a video decoder will predict the current block from the reconstructed neighboring block according to the regular intra prediction mode.