Encoding and decoding digital data in a video format

Details Encoding and decoding digital data in a video format Encoding and decoding digital data in a video format

1980-10-31

1983-06-07

Faber, Alan

Facsimile and static presentation processing

Facsimile

Recording apparatus

375 25, H04N 900

Patent

active

043874061

ABSTRACT:
A technique for storing and transmitting digital data in a video format includes use of chrominance and luminance portions of a video signal for transmitting data and timing information. The data is encoded according to a predetermined set of chrominance signals corresponding to a predetermined set of colors. Timing information is conveyed by a change in the luminance or brightness of the video signal. A predetermined brightness level transition determines when the chrominance signal should be decoded in order to determine which of the plurality of colors is indicated. The use of the luminance signal to transmit timing information enables the use of a decoding circuit having a relatively simple structure. In one preferred embodiment, two predetermined colors are employed to indicate either a digital one or a digital zero. It is further preferred that a frame border of a predetermined non-encoded color surround each frame of encoded color signals in order to reduce the noise sensitivity of the system during both horizontal and vertical retrace. Video signals encoded in this manner may be stored in video cassette recordings or video disk recordings or may be transmitted in the manner of ordinary television signals.

REFERENCES:
patent: 4275411 (1981-06-01), Lippel

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