Color image display control apparatus with correction of phase d

Details Color image display control apparatus with correction of phase d Color image display control apparatus with correction of phase d

1989-06-20

1991-08-27

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 21R, H04N 945

Patent

active

050437992

ABSTRACT:
A color image display control apparatus for receiving a composite color picture signal and processing color image data included in the signal. A color picture signal in an analog form included in the composite color picture signal is converted to a digital form by sampling the analog signal at each cycle of a sampling clock, in and analog to digital converter. The digital image data is processed in a digital image processing circuit. Processed digital data is converted to analog data in a digital to analog converter. Information regarding a phase difference between the sampling clock and each horizontal synchronizing signal in the composite color picture signal is obtained. According to the information, a digital image data in a line corresponding to each horizontal synchronizing signal, which was sampled by the sampling clock, is modified so that the influence of the above phase difference on a displayed image of the processed image data is corrected.

REFERENCES:
patent: 4680632 (1987-07-01), Willis
patent: 4689664 (1987-08-01), Moring
patent: 4694326 (1987-09-01), Demmer
T. Kurita et al., "IDTV Apparatus by SCAD System" in the 1987 National Convention Record of the Institute of Television Engineers of Japan, No. 13-3, pp. 309-310.
R. Kobayashi, "IDTV Apparatus by SCAD(Sub-Carrier AD) System" in the 1987 National Convention Record of the Institute of Television Engineers of Japan, No. 13-4, pp. 311-312.
Kiyoyuki Kawai et al., "IDTV Receiver" in the Digest of Technical Papers of the 1987 IEEE International Conference on Consumer Electronics, Session XIII-TV Receiver Design, THPM 13.4, pp. 172-173.

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