Invention Grant
- Patent Title: Coded block flag coding
- Patent Title (中): 编码块标志编码
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Application No.: US13739598Application Date: 2013-01-11
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Publication No.: US09467701B2Publication Date: 2016-10-11
- Inventor: Liwei Guo , Xianglin Wang , 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: Shumaker & Sieffert, P.A.
- Main IPC: H04N7/50
- IPC: H04N7/50 ; H04N19/96 ; H04N19/46 ; H04N19/186 ; H04N19/176 ; H04N19/70

Abstract:
A video encoder generates a bitstream that includes a residual quad tree (RQT) for a coding unit (CU). The CU is larger than a maximum-allowable transform unit (TU) size and the RQT includes a hierarchy of nodes. A root node of the RQT corresponds to the CU as a whole and leaf nodes of the RQT correspond to TUs of the CU. The root node is associated with a coded block flag (CBF) for a chroma component. The CBF for the chroma component indicates whether any of the TUs of the CU are associated with a significant coefficient block that is based on samples of the particular chroma component. A video decoder receives the bitstream and determines, based on the CBF, whether coefficient blocks associated with TUs that correspond to the leaf nodes include non-zero coefficients.
Public/Granted literature
- US20130266074A1 CODED BLOCK FLAG CODING Public/Granted day:2013-10-10
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