Method of flow compression of data transmitted successively betw

Details Method of flow compression of data transmitted successively betw Method of flow compression of data transmitted successively betw

1983-08-18

1986-04-15

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358135, 375 27, H04N 1104, H04N 712, H04B 1406

Patent

active

045831149

ABSTRACT:
The method and the system for compression of the flow of data between a television transmitter and a television receiver make provision at the transmitter for a differential coding system comprising a circuit for computation and propagation of coding costs with respect to visibility thresholds at which a coding error becomes apparent on the received image, coding being performed by utilizing at least two different quantization and/or prediction characteristics. A device connected to the differential coding system transmits to the receiver an indication relating to a change in characteristic instead of the data corresponding to the image point to be transmitted when the point is located within an image zone in which the change is necessary. A device is provided at the receiver for reconstructing the data corresponding to the non-transmitted point as a function of data of points already known to the receiver.

REFERENCES:
patent: 3761613 (1973-09-01), Limb
patent: 3825832 (1974-07-01), Frei et al.
patent: 4144543 (1979-03-01), Koga
patent: 4215374 (1980-07-01), Mizuno
patent: 4519085 (1985-05-01), Catros
J. Heitmann: "Ein Systemkompatibles Digitales Farbfernsehsignal", Rundfunktechnische Mitteilungen, vol. 20, No. 6, 1976, pp. 236-241.

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