Television sound receiving circuit for at least one sound channe

Details Television sound receiving circuit for at least one sound channe Television sound receiving circuit for at least one sound channe

1986-08-25

1987-12-01

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358197, 370 20, 455 46, 455202, 329146, 329167, 328 55, 328133, H04N 704, G06G 714, H03K 500

Patent

active

047108142

ABSTRACT:
A television sound receiving circuit for at least one sound channel contained in an RF signal converts the transmitted or already down-converted television signal as a composite signal to the baseband in a single-sideband demodulator circuit using the "phasing method", separates the first sound channel, corresponding to a lower sideband, and the second sound channel, corresponding to an upper sideband, and produces first and second sound signals at the desired frequency by subsequent frequency demodulation. Also shown are the interfaces for possible digitization and an advantageous use of the interfaces in which picture and sound signals are digitized together. The data can be combined into a single data stream which can be transferred over a bus system and is separable into the individual components if required.

REFERENCES:
patent: 4241451 (1980-12-01), Maixner et al.
patent: 4264975 (1981-04-01), Voorman
patent: 4397039 (1983-08-01), McAuliffe
patent: 4531224 (1985-07-01), McCallister
patent: 4571622 (1986-02-01), Davidov et al.

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