Digital television system with truncation error correction

Details Digital television system with truncation error correction Digital television system with truncation error correction

1982-10-21

1985-04-16

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 37, H04N 514

Patent

active

045119228

ABSTRACT:
In a digital television signal processing system, first digital samples containing picture information are supplied to a digital processor. The processor operates on the samples to derive second samples that contain picture information modified from the original picture information. The digital processor includes within it processing chain a stage that produces an output digital word that is subject to truncation error when the processor is supplied with selected ones of the first digital samples. The truncation error results in the derivation of second digital samples that contain erroneously modified picture information. The truncation error is detected, and the values of the second digital samples are changed to different ones that contain picture information corrected for the effects of the truncation error.

REFERENCES:
patent: 4124869 (1978-11-01), Heitmann
patent: 4215415 (1980-07-01), Kanemasa et al.
patent: 4270139 (1981-05-01), Flamm et al.
patent: 4276649 (1981-06-01), Groenendaal et al.
patent: 4340940 (1982-07-01), Williams
patent: 4356507 (1982-10-01), Goldberg et al.
patent: 4430721 (1984-02-01), Acampora
Proceedings of the IEEE, vol. 63, pp. 633-648, Apr. 1975, "Special-Purpose Hardware for Digital Filtering," by Stanley _L. Freeny.

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