Technique for the transmission of video and audio signals over a

Details Technique for the transmission of video and audio signals over a Technique for the transmission of video and audio signals over a

1984-01-03

1985-10-01

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, 358141, 370 4, H04N 704

Patent

active

045449503

ABSTRACT:
The present invention relates to a technique for transmitting both a video and a plurality of audio signals within a predetermined signal format which is compatible with a known signal format not normally used for television transmission. More particularly, the video signal is sampled at a first multiple of the video subcarrier frequency. The digitized video signal and associated video mode status bits are then multiplexed with the plurality of digitized audio signals into an N-bit frame format using a second multiple of the video subcarrier frequency which is less than the line frequency of the known signal format. The N-bit frames are then sectioned into Y-bit subframes and multiplexed with auxiliary and monitoring bit information comprising, for example, frame location bits for the Y-bit subframes using a third multiple of the video subcarrier frequency to generate a system signal format which is compatible with the known signal format. At a receiving end the system signal format is demultiplexed in a reverse manner to the multiplexing sequence at the transmitter.

REFERENCES:
patent: 3936595 (1976-02-01), Yanagimachi et al.
patent: 4441180 (1984-04-01), Schussler
patent: 4479142 (1984-10-01), Buschman et al.
patent: 4481621 (1984-11-01), Schmark et al.
patent: 4491953 (1985-01-01), Bellisio et al.
IEEE Trans. Comm., vol. COM-26(5), May 1978, "Design Technique for Multiplexing Asynchronous Digital Video and Audio Signals", by J. H. Stott, pp. 601-610.
WE Network News Marketing Comm., Apr. 1983, "New WE Digital TV Lightwave System".
IEEE J. Selected Areas in Comm., vol. SAC-1(3), Apr. 1983, "FT3C-A Lightwave System for Metropolitan and Intercity Applications", by J. Stauffer, pp. 413-419.

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