发明公开
- 专利标题: Method and apparatus for vector coding of video transform coefficients
- 专利标题(中): 视频变换系数矢量编码的方法与装置
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申请号: EP93104283.2申请日: 1993-03-16
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公开(公告)号: EP0562420A3公开(公告)日: 1994-06-01
- 发明人: Krause, Edward A. , Tom, Adam , Liu, Vincent
- 申请人: GENERAL INSTRUMENT CORPORATION OF DELAWARE
- 申请人地址: 181 West Madison Street Chicago, Illinois 60602 US
- 专利权人: GENERAL INSTRUMENT CORPORATION OF DELAWARE
- 当前专利权人: GENERAL INSTRUMENT CORPORATION OF DELAWARE
- 当前专利权人地址: 181 West Madison Street Chicago, Illinois 60602 US
- 代理机构: Hoeger, Stellrecht & Partner
- 优先权: US858102 19920326
- 主分类号: H04N7/133
- IPC分类号: H04N7/133
摘要:
A vector coding scheme for video transform coefficients is provided. A vector is generated to identify a group of coefficients from a block of transform coefficients that qualify for transmission according to predetermined criteria. In an illustrated embodiment, only coefficients having nonzero amplitudes are transmitted. The vector is encoded to provide a vector code word for transmission. The coefficients from the group qualifying for transmission are encoded to provide coefficient code words for transmission. The vector code word correlates the coefficient code words to coefficient locations in the block. In a preferred embodiment, the block is divided into a plurality of regions containing subsets of coefficients. A separate vector is transmitted for each region, correlating the coefficient code words to coefficient locations in the corresponding region of the block.
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