Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1992-03-04
1994-02-15
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
371 31, H04N 5213
Patent
active
052871851
ABSTRACT:
A method of correcting digital NTSC color-television signals in transmission error by substituting the error-included digital color-television signals with those digital color-television signals in the corresponding horizontal scanning periods two frame periods before, stored in memory (12), and an apparatus to work the method. When a transmission error is detected in a specific horizontal scanning period, substitute circuit (13) reads from memory (12) the digital color-television signals in the N horizontal scanning periods two frame periods before corresponding to the specific and subsequent N-1 horizontal scanning periods, and transmits the digital color-television signals read from memory (12) in lieu of those digital color-television signals in the specific and subsequent N-1 horizontal scanning periods.
REFERENCES:
patent: 4519001 (1985-05-01), Morrison
patent: 4641309 (1987-02-01), Nakano
patent: 4680658 (1987-07-01), Tatami
patent: 4686583 (1987-08-01), Tomita et al.
patent: 4792953 (1988-12-01), Pasdera et al.
patent: 5148291 (1992-09-01), Kimura et al.
Cho Fujio
Koike Shinji
Kostak Victor R.
NEC Corporation
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