发明公开
EP0019936A1 Method and device for digital encoding and decoding of composite PAL video signal
失效
用于数字编码和一个复杂的PAL视频信号的解码方法和设备。
- 专利标题： Method and device for digital encoding and decoding of composite PAL video signal
- 专利标题（中）： 用于数字编码和一个复杂的PAL视频信号的解码方法和设备。
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申请号： EP80103094.1申请日： 1980-06-04
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公开(公告)号： EP0019936A1公开(公告)日： 1980-12-10
- 发明人: Chiariglione, Leonardo , Guglielmo, Mario
- 申请人： CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A.
- 申请人地址： Via Guglielmo Reiss Romoli, 274 I-10148 Turin IT
- 专利权人： CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A.
- 当前专利权人： CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A.
- 当前专利权人地址： Via Guglielmo Reiss Romoli, 274 I-10148 Turin IT
- 代理机构： Riederer Freiherr von Paar zu Schönau, Anton
- 优先权： IT6820479 19790605
- 主分类号： H04N9/02
- IPC分类号： H04N9/02 ; H04N9/39
摘要：
Method of and device for digital encoding and decoding of compositie PAL video signal in which the correlation between two lines following one another in time is used for the prediction.
In transmission from the video signal, sampled at a frequency f s = (fsc - 25 Hz) in which fsc is the colour subcarrier, blocks of 12 image signal samples are extracted; on them a discrete Fourier Transform is performed in order to produce subsequent series of 12 coefficients.
Of each series of 12 image cofficients the first three undergoing a DPCM coding, the fourth to the ninth and the twelfth undergoing a PCM coding, the tenth and eleventh, containing basically the information of the colour subcarrier, undergoing a specific DPCM coding, utilizing for the prediction the burst phase information extracted at the beginning of each line.
In transmission from the video signal, sampled at a frequency f s = (fsc - 25 Hz) in which fsc is the colour subcarrier, blocks of 12 image signal samples are extracted; on them a discrete Fourier Transform is performed in order to produce subsequent series of 12 coefficients.
Of each series of 12 image cofficients the first three undergoing a DPCM coding, the fourth to the ninth and the twelfth undergoing a PCM coding, the tenth and eleventh, containing basically the information of the colour subcarrier, undergoing a specific DPCM coding, utilizing for the prediction the burst phase information extracted at the beginning of each line.
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