Signal processing circuit for video signal with buried audio sig

Details Signal processing circuit for video signal with buried audio sig Signal processing circuit for video signal with buried audio sig

1980-09-29

1982-11-30

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 708

Patent

active

043618529

ABSTRACT:
An audio signal is time-compressed and injected as a buried audio signal into one or more selected line-scanning periods of a video signal, preferably during the vertical blanking portion of each field period. An encoding circuit for performing this function includes a memory device and a clock generator for providing to the memory device a high-speed clock signal during the selected line-scanning periods of each field period, and a low-speed clock signal during the remainder of the video signal. In the encoding circuit, a continuous audio signal is written into the memory device at low speed during substantially all of each field period and is read out therefrom at high speed during the selected line-scanning periods as a buried audio signal. In a complementary decoding circuit, the buried audio signal is written into a memory device at high speed during the selected line-scanning period and is read out therefrom at low speed during the remainder of each field period to reconstruct a substantially continuous audio signal. The memory device can be an analog device such as a CCD shift register, or can be a digital memory with associated A/D and D/A converters.

REFERENCES:
patent: 3506780 (1970-04-01), Camras
patent: 3819852 (1974-06-01), Wolf
patent: 3855424 (1974-12-01), Tharmaratnam
patent: 4266243 (1981-05-01), Shutterly
Gassmann, "Twelve Sound Channels During the Vertical Sync Internal of the Television Signal", IEEE Trans Broadcast and Television Receivers, vol. BTR-16, No. 4, Nov. 1970, pp. 318-324.

Affiliated with

Also associated with

Rating

Signal processing circuit for video signal with buried audio sig does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signal processing circuit for video signal with buried audio sig, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal processing circuit for video signal with buried audio sig will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-197941