发明公开
EP0800316A3 Method of coding video signals and transmission system thereof
失效
Verfahren zur Kodierung vond Videosignalen undÜbertragungsystemdafür
- 专利标题： Method of coding video signals and transmission system thereof
- 专利标题（中）： Verfahren zur Kodierung vond Videosignalen undÜbertragungsystemdafür
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申请号： EP97107378申请日： 1990-10-15
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公开(公告)号： EP0800316A3公开(公告)日： 1998-06-03
- 发明人: YAGASAKI YOICHI , YONEMITSU JUN
- 申请人： SONY CORP
- 专利权人： SONY CORP
- 当前专利权人： SONY CORP
- 优先权： JP26704989 1989-10-14
- 主分类号： H04N19/50
- IPC分类号： H04N19/50 ; G06T9/00 ; H04N9/804 ; H04N19/115 ; H04N19/126 ; H04N19/134 ; H04N19/149 ; H04N19/176 ; H04N19/192 ; H04N19/196 ; H04N19/423 ; H04N19/503 ; H04N19/593 ; H04N19/91 ; H04N7/30 ; H04N7/50
摘要：
A method and apparatus for coding video data to reduce the amount of data that must be transmitted, involving performing a discrete cosine transform of a frame of data, requantizing the transformed data with a variable quantizing step and recoding the requantized data with a variable coding length. The size of the quantizing step is controlled according to a characteristic of the data.
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