Invention Grant
- Patent Title: Method and apparatus of the quantization matrix computation and representation for video coding
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Application No.: US17436824Application Date: 2020-03-06
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Publication No.: US12095993B2Publication Date: 2024-09-17
- Inventor: Chen-Yen Lai , Olena Chubach , Tzu-Der Chuang , Ching-Yeh Chen , Chih-Wei Hsu , Yu-Wen Huang
- Applicant: MEDIATEK INC.
- Applicant Address: TW Hsinchu
- Assignee: HFI INNOVATION INC.
- Current Assignee: HFI INNOVATION INC.
- Current Assignee Address: TW Zhubei
- Agency: McClure, Qualey & Rodack, LLP
- International Application: PCT/CN2020/078123 2020.03.06
- International Announcement: WO2020/182069A 2020.09.17
- Date entered country: 2021-09-07
- Main IPC: H04N19/126
- IPC: H04N19/126 ; H04N19/159 ; H04N19/176 ; H04N19/18

Abstract:
A method and apparatus for video coding using a coding mode belonging to a mode group comprising an Intra Block Copy (IBC) mode and an Intra mode are disclosed. According to the present invention, for both IBC and Intra mode, a same default scaling matrix is used to derive the scaling matrix for a current block. In another embodiment, for the current block with block size of M×N or N×M, and M greater than N, a target scaling matrix is derived from an M×M scaling matrix by down-sampling the M×M scaling matrix to an M×N or N×M scaling matrix.
Public/Granted literature
- US20220182629A1 Method and Apparatus of the Quantization Matrix Computation and Representation for Video Coding Public/Granted day:2022-06-09
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