Spread spectrum digital data transmission over TV video

Details Spread spectrum digital data transmission over TV video Spread spectrum digital data transmission over TV video

1991-12-20

1993-09-07

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358141, H04N 708

Patent

active

052434230

ABSTRACT:
A co-channel communication system allows transmission of one or more data signals in an active or visible portion of a video raster in a manner that is imperceptible to a viewer. More particularly, the data signal is transmitted over a preselected active video lines of a video raster. In order to reduce the perceptibility of the data signal, the video lines over which the data signal is transmitted is varied according to a random sequence. In an alternate embodiment, the data is also modulated at relatively low modulation levels, for example, by converting the data signal to a spread spectrum signal.

REFERENCES:
patent: 3244808 (1966-04-01), Roberts
patent: 3562420 (1971-02-01), Thompson
patent: 3838444 (1974-09-01), Loughlin et al.
patent: 3842196 (1974-10-01), Loughlin
patent: 3984624 (1976-10-01), Waggener
patent: 4363138 (1982-12-01), Franklin et al.
patent: 4425642 (1984-01-01), Moses et al.
patent: 4841545 (1989-06-01), Endo et al.
patent: 4912721 (1990-03-01), Pidgeon, Jr. et al.
patent: 4969041 (1990-11-01), O'Grady et al.
Spread Spectrum Goes Commerical by D. L. Schilling, R. L. Pickholtz, and L. B. Mistein, IEEE Spectrum Magazine, Aug. 1990, pp. 40-46.

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