Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-12-07
1990-10-23
Kostak, Vic
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, 358141, H04N 712
Patent
active
049656678
ABSTRACT:
A receiver for a high definition television signal in which the signal prior to transmission is sub-sampled on a block-by-block basis according to the movement has an input (39) which receives the sub-sampled signal which is applied to a shuffler (40) which shuffles the pixels of blocks in a manner which is the inverse to that performed prior to transmission. The correctly positioned pixels are applied to means (43,44,45) for adaptive switched interpolation filtering capable of providing spatial frequency filter responses which approximate those at the transmitter, for sub-sampling blocks of the interpolated picture are sub-sampled but where pixels adjacent but outside a block are sub-sampled with the same structure as that of the block and for non-adaptive switched interpolation filtering for providing spatial frequency filter responses which substantially correspond to those at the transmitter. An output (46) provides the reproduced high definition television signal. A digitally assisted television signal at a further input 41 is used to control the inverse shuffling and the selection of filter responses.
REFERENCES:
patent: 4713688 (1987-12-01), Guther
patent: 4745458 (1988-05-01), Hirano et al.
patent: 4785348 (1988-11-01), Fonsalas et al.
patent: 4845561 (1989-02-01), Doyle et al.
"Analyse de Structures de Sais-Echantillonage Spatio-Temporel d'un Signal TVHD en Vue de sa Transmission Dans an Canal MAG", TVHD Ottawa Convention, Oct. '87; Bernand et al.
Trew Timothy I. P.
Vreeswijk Franciscus W. P.
Kostak Vic
Marion Michael E.
U.S. Philips Corporation
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