Invention Grant
- Patent Title: Chroma quantization parameter (QP) offset
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Application No.: US16996753Application Date: 2020-08-18
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Publication No.: US11323712B2Publication Date: 2022-05-03
- Inventor: Wei-Jung Chien , Kai Zhang , Yi-Wen Chen , Marta Karczewicz
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Polsinelli LLP
- Main IPC: H04N19/124
- IPC: H04N19/124 ; H04N19/157 ; H04N19/186 ; H04N19/196 ; H04N19/42 ; H04N19/70 ; H04N19/103 ; H04N19/174

Abstract:
Provided are systems, methods, and computer-readable medium for encoding and decoding video data. In various examples, a coding device can include multiple luma QP and chroma QP relationship tables. In performing quantization or inverse quantization one video data being encoded or decoded, respectively, the coding device can select a table. The table can be selected based on, for example, a slice type, a prediction mode, and/or a luminance value, among other factors. The coding device can then use the luma QP value to look up a chroma QP value from the table. The luma QP and chroma QP values can then be used in quantization or inverse quantization.
Public/Granted literature
- US20200382782A1 CHROMA QUANTIZATION PARAMETER (QP) OFFSET Public/Granted day:2020-12-03
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