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SAMPLE TELEVISION SIGNAL PROCESSING SYSTEM, COLOR TELEVISION DIGITAL SIGNAL TRANSMISSION SYSTEM, TRANSCODING METHOD AND TELEVISION DIGITAL SIGNAL RECEIVER
SAMPLE TELEVISION SIGNAL PROCESSING SYSTEM, COLOR TELEVISION DIGITAL SIGNAL TRANSMISSION SYSTEM, TRANSCODING METHOD AND TELEVISION DIGITAL SIGNAL RECEIVER
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机译:样本电视信号处理系统,彩色电视数字信号传输系统,编码方法和电视数字信号接收器
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摘要
A digital television system in which siganls are sampled at 13.5 MHz and produce an integer number of samples during each horizontal line interval whether the signals are based upon PAL/S.E.C.A.M. or NTSC standards. In order to make the digital system hierarchical and to adapt it for simple transcoding from an NTSC signal sampled at 4 times color subcarrier, the number of samples occurring during the active portion of each horizontal line in the digital system is made equal to 704. Transcoding by interpolation from 4XCS-sampled NTSC video to the digital system is accomplished by selecting a particular number of samples per active line namely 748 such that small blocks of samples can be transcoded independently, which allows interpolation to be achieved simply. A similar transcoding scheme is also described for PAL signals. IMAGE
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