Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1981-03-30
1983-12-06
Richardson, Robert L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358336, 382 42, H04N 521
Patent
active
044196938
ABSTRACT:
A method of concealing errors in a digital television signal formed by a plurality of sample signals corresponding respectively to sample positions along a horizontal scan line of a television picture made up of a plurality of such lines, the method comprising, in respect of each sample signal which is in error, selecting from a plurality of algorithms a preferred algorithm for correcting the error sample signal, calculating a corrected value of the error sample signal using the preferred algorithm, and substituting the corrected sample signal for the error sample signal so as to conceal the error. The algorithms may be four in number and use sample values located along four different directions respectively, such as the horizontal, the vertical, and the two diagonal directions of the television raster, to predict the known sample values at sample positions adjacent to the position of the error sample signal, the algorithm giving the best result being selected.
REFERENCES:
patent: 3946432 (1976-03-01), Goldberg et al.
patent: 4275418 (1981-06-01), Trump
patent: 4365273 (1982-12-01), Yamada et al.
SMPTE Journal, vol. 87, No. 3, pp. 129-133, Mar. 1978.
Eslinger Lewis H.
Richardson Robert L.
Sinderbrand Alvin
Sony Corporation
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