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Method for transmitting spectrum-compatible high-definition television signal and circuit therefor in a television signal transmission system
Method for transmitting spectrum-compatible high-definition television signal and circuit therefor in a television signal transmission system
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机译:在电视信号传输系统中传输频谱兼容的高清电视信号的方法及其电路
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摘要
An HDTV system wherein the HDTV signals may have the same frequency band as that of the conventional color television signals and be transmitted through a unoccupied channel of the conventional color television system, is disclosed. The HDTV system includes a ITLC circuit for compressing on time-base the digital signals; a band separation circuit for separating the output signal of the ITLC circuit into low and high frequency band signal; a motion vector detector for detecting motion vector from the low frequency band signals; a high frequency band signal processor for processing the high frequency band signals according to the output of motion vector detector; a first LPF for filtering the high frequency analog signal; a second LPF for filtering the low frequency analog signal; and a quadrature modulator for multiplying the output of the first and second LPF, respectively, by Cos &ohgr;t signal and Sin . omega.t signal, and thereafter adding the multiplied signals to each other to produce therefrom a transmission signal.
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