基本信息:
- 专利标题： CODING AND DECODING DEVICE FOR TIME-VARYING IMAGE
- 专利标题（中）：用于时变图像的编码和解码设备
- 申请号：PCT/JP1992000910 申请日：1992-07-16
- 公开(公告)号：WO1993002528A1 公开(公告)日：1993-02-04
- 发明人： SONY CORPORATION
- 申请人： SONY CORPORATION , KATO, Motoki , YAGASAKI, Yoichi , YONEMITSU, Jun
- 专利权人： SONY CORPORATION,KATO, Motoki,YAGASAKI, Yoichi,YONEMITSU, Jun
- 当前专利权人： SONY CORPORATION,KATO, Motoki,YAGASAKI, Yoichi,YONEMITSU, Jun
- 优先权： JP3/179838 19910719; JP4/012448 19920127
- 主分类号： H04N07/133
- IPC分类号： H04N07/133
摘要：
A coding and decoding device for a time-varying picture, by which a high picture quality is obtained from a smaller amount of information than a system using only DCT coding. The efficiency of coding can be increased and the block distortion of a composite image is reduced. An image is divided into several blocks, and each block is coded. At this time discrete cosine transformation coding (DCT) and intrablock predictive composing (NTC) are switched over to each other adequately according to the property of the image pattern. When the intrablock predictive composing is executed, the predictive value and quantization width of a block are transmitted.