Moving-image coder with self-identification of the stuffing char

Facsimile and static presentation processing – Static presentation processing – Attribute control

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375118, 370102, H04N 1104

Patent

active

047316462

ABSTRACT:
A method and apparatus are described for adjusting clock pulses of time-equidistant digital line scanning values of a moving-image signal present in a composite color video signal to a clock used in a digital transmission link by means of a moving-image coder. In the transmitting part (10) of the moving-image coder, self-identifying stuffing characters are inserted into the string of image scanning values if clock deviations are found. The identification may be carried out by means of an additional bit or, alternatively, by a special code word when this is first removed from the supply of image scanning values. In the receiving part (30) of the moving-image coder, the stuffing character is recognized and removed and the original character string is restored.

REFERENCES:
patent: 4320419 (1982-03-01), Cottraill
patent: 4561100 (1985-12-01), Asao
patent: 4622579 (1986-11-01), Starck
"PCM NTSC Television Characteristics", by A. A. Goldberg in SMPTE Journal, vol. 85, No. 3, Mar. 1976.
"Space-Division Digital Newtorks for Video Signals", by Noriyoshi Kuroyanagi; IEEE Transactions on Communications; vol. Com-20, No. 3, Jun. 1972.

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