Television – Flutter or jitter correction – Specified color
Patent
1994-12-16
1995-11-28
Metjahic, Safet
Television
Flutter or jitter correction
Specified color
358314, 358320, H04N 594, H04N 5956, H04N 595
Patent
active
054712505
ABSTRACT:
A digital time base corrector reduces the capacity of a memory to approximately a 1 H of image data while maintains the interleave relationship between a luminance signal and a chrominance signal of a video signal. Polarity data indicating the polarity of a burst signal is generated every 1 H, and a latch circuit is provided for holding and outputting the polarity data during a period of reading image data and polarity data from an image data memory and a sub-carrier phase memory, corresponding to the 1 H in which the polarity data was generated. When dropout occurs in a video signal, the image data and the polarity data are inhibited from being written into the image data memory and the sub-carrier phase memory. When discrepancy is detected between read polarity data and polarity data held in the latch circuit, the color phase of the read image data is inverted.
REFERENCES:
patent: 4251830 (1981-02-01), Tatami
patent: 4339770 (1982-07-01), Dennison et al.
patent: 4345272 (1982-08-01), Shirota
patent: 4376290 (1983-03-01), Shirota
patent: 4716454 (1987-12-01), Oldershaw et al.
Nakajima Masahiro
Otaki Hiroshi
Metjahic Safet
Pioneer Electronic Corp.
Pioneer Video Corporation
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