Baseband CATV decoder with stereo bypass

Details Baseband CATV decoder with stereo bypass Baseband CATV decoder with stereo bypass

1984-09-11

1986-12-16

George, Keith E.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 86, H04N 716, H04N 710

Patent

active

046301135

ABSTRACT:
A CATV decoder for receipt of television stereo audio includes a shunt path having a 4.5 MHz filter and amplifier for translating the 4.5 MHz audio signal to a modulator thus bypassing the normal audio baseband detector and 4.5 MHz oscillator circuit. A switch acts through an OR gate for selectively enabling the shunt path and normal audio path. Control from the cable head end is provided by a signal to the OR gate for returning operation to the normal audio path if reception is not authorized. In a similar manner, a remote audio mute signal may be supplied to the OR gate by the viewer.

REFERENCES:
patent: 4398216 (1983-08-01), Field et al.
Ocker et al, "TV Multichannel Sound-Savior or Sacred Cow?", IEEE Transactions on Consumer Electronics, vol. CE-27, No. 3, Aug. 1981, pp. 361-365.
Eilers et al, "Television Multichannel Sound Broadcasting-A Proposal, IEEE Transactions on Consumer Electronics, vol. CE-27, No. 3, Aug. 1981, pp. 398-409.

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