发明公开
EP0524625A2 Method and apparatus for communicating compressed video using trellis coded QAM
失效
用于发送具有格栅编码Q.A.M压缩的视频信号的方法和装置..
- 专利标题： Method and apparatus for communicating compressed video using trellis coded QAM
- 专利标题（中）： 用于发送具有格栅编码Q.A.M压缩的视频信号的方法和装置..
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申请号： EP92112592.8申请日： 1992-07-23
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公开(公告)号： EP0524625A2公开(公告)日： 1993-01-27
- 发明人: Paik, Woo H. , Lery, Scott A. , Heegard, Chris , Krause, Edward A. , Heller, Jerrold A.
- 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： US736738 19910726; US908407 19920710
- 主分类号： H04N7/13
- IPC分类号： H04N7/13 ; H04L27/34 ; H04N7/00
摘要：
A method and apparatus for communicating high definition television signals is provided. Video signals are divided into blocks of PCM data. The PCM data is processed using motion estimation and compensation (150) to provide DPCM data. For each block, one of PCM and DPCM data is selected for transmission based on a predetermined criteria. The selected data is compressed using the discrete cosine transform (133,134) to provide blocks of transform coefficients. The coefficients are quantized (135,136) to improve their coding efficiency and then variable length coded (138). The variable length coded coefficients are coded using a concatenated coding scheme with a Reed-Solomon outer code and trellis inner code to provide coded signals for transmission. The coded signals are transmitted using QAM.
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