Automatic equalization system for television receiver

Details Automatic equalization system for television receiver Automatic equalization system for television receiver

1980-11-13

1982-06-15

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 21V, 358160, 358905, H04N 9535

Patent

active

043353967

ABSTRACT:
An automatic equalization circuit for a television receiver utilizes a portion of the VIR signal appearing in the conventional composite television signal as the training signal for the equalization circuit. A transversal filter in the form of a charge coupled device (CCD) clocked by a voltage controlled oscillator is used as the delay line for the equalization circuit. The output taps of the CCD are coupled through analog multipliers which, in turn, are provided with an error signal produced by the comparison between a reference signal and the output of an adder circuit connected to the outputs of all of the analog multipliers to vary the outputs of the analog multipliers in accordance with an error signal produced by the comparison circuit. The system also replaces the usual luminance delay line of a color television receiver, and the center tap of the CCD provides the delay normally imparted to the luminance signal components in such a receiver.

REFERENCES:
patent: 3755617 (1973-08-01), Ichida
patent: 4044381 (1977-08-01), Shimano et al.
patent: 4127874 (1978-11-01), Iwasawa et al.
patent: 4130831 (1978-12-01), Isono et al.
patent: 4285006 (1981-08-01), Kurahashi et al.

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