TV stereo adapter

Details TV stereo adapter TV stereo adapter

1985-07-23

1986-12-30

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

358144, 358198, 381107, 455 41, H04H 500

Patent

active

046334955

ABSTRACT:
A television stereo adapter is provided for use with a television receiver to detect and decode stereophonic audio signals that may be transmitted with the composite television signals. The adapter includes an IF pick-up that is physically separate from the television receiver for picking up spurious IF audio signals that normally are generated by the television receiver. A stereo detector is coupled to the IF pick-up for detecting from the IF audio signals monophonic and stereophonic components that are transmitted with the composite television signals. The detected components are decoded into left-channel and right-channel audio signals; and these left-channel and right-channel signals are adapted to drive sound transducers, such as loudspeakers. Optionally, the left-channel and right-channel audio signals are amplified by gain-controlled amplifiers whose gains are a function of the output sound level of the television receiver.

REFERENCES:
patent: 3059189 (1962-10-01), Preisig
patent: 3118970 (1964-01-01), Silver
patent: 3688052 (1972-08-01), Self
patent: 4001709 (1977-01-01), Clinkscales
patent: 4254303 (1981-03-01), Takizawa
patent: 4272788 (1981-06-01), Ogita
patent: 4380824 (1983-04-01), Inoue
patent: 4389536 (1983-06-01), Schickedanz

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