Reduced data rate signal separation system

Details Reduced data rate signal separation system Reduced data rate signal separation system

H - Electricity

04

N

350/72

H04N 9/12 (2006.01) H04N 9/78 (2006.01)

Patent

CA 1206597

-26- ABSTRACT OF THE DISCLOSURE Signal separation arrangements are provided for separating frequency interleaved signal components of a video signal one of which is modulated as a double sideband modulated component of a subcarrier frequency. A video signal is sampled by a digital-to-analog converter. The resultant signal samples are applied to a bandpass filter. The bandpass filter produces a filtered signal restricted to a given passband of the original video band over which the double-sideband-modulated component is modulated. The filtered information in the passband is comb-filtered by a comb filter operating on selected ones of the bandpass-filtered samples in response to a subsampling clock signal. The subsampling clock frequency is less than or equal to the subcarrier frequency. The comb filter comprises a shift register and a signal combining circuit. Comb-filtered samples, produced at the subsampling clock rate, correspond to one of the interleaved signal components.

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