Television signal converter

Details Television signal converter Television signal converter

1989-07-19

1990-03-20

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 13, 380 19, 380 20, H04N 7167

Patent

active

049107712

ABSTRACT:
A television signal converter includes a CATV tuner having a channel converting function, a gain changing circuit for descrambling the output from the CATV tuner and the like, in order to convert a television signal such as a CATV signal formed by a scrambled video signal into a descrambled television signal of channel 3, for example. The descrambled channel 3 CATV signal outputted from the gain changing circuit includes noise in the reproduced audio signal since the audio carrier is influenced by gain changing. In the present invention, therefore, the audio signal is reproduced from an audio carrier extracted from the front stage of a gain changing circuit. Thus, the reproduced audio signal is released from noise caused by gain changing.

REFERENCES:
patent: 4163252 (1979-07-01), Mistry et al.
patent: 4295155 (1981-10-01), Jarger et al.
patent: 4323922 (1982-04-01), den Toonder et al.
patent: 4389671 (1983-06-01), Posner et al.
patent: 4458268 (1984-07-01), Ciciora
patent: 4471380 (1984-09-01), Mobley

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