Automatic gain control of a scrambled video signal

Details Automatic gain control of a scrambled video signal Automatic gain control of a scrambled video signal

H - Electricity

04

N

350/26

H04N 7/167 (2006.01) H04N 5/53 (2006.01) H04N 7/171 (2006.01)

Patent

CA 1278371

ABSTRACT A television receiver receives a scrambled television signal of the suppressed sync pulse type. The sync pulse is restored by a decoder which provides a sync restored video signal to video signal processing circuits of the receiver, and to automatic gain control circuits of the receiver via an interface network. The interface network develops a control signal with a magnitude related to the magnitude of the restored sync pulse. The control signal is coupled to the automatic gain control circuits for maintaining a desired video signal gain. The disclosed suppressed sync signal processing system permits the use of an uncomplicated and economical decoder, i.e., without integral tuner, AGC and remodulator circuits.

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