Characteristics corrector

Details Characteristics corrector Characteristics corrector

1988-12-13

1991-04-23

Coles, Jr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 21V, H04N 1700

Patent

active

050104047

ABSTRACT:
A characteristics corrector in a video signal processing system is described for correcting characteristics of the video signal processing system at the time of recording and/or reproducing a video signal. The corrector includes a reference pulse generating circuit for generating reference pulses of varying amplitude corresponding to gradations from a black level to a white level of a video signal to be recorded during a blanking period of the video signal to be recorded. It further includes a pulse amplitude data generating circuit for generating quantified data used for the discrimination of the amplitudes of the reference pulses. Also, a reference data interleaving circuit is included for interleaving, as a reference data, the reference pulses and pulse amplitude data indicative of the amplitudes thereof during the blanking period. Finally, a level correcting circuit is included for correcting the level of a reproduced video signal by the utilization of a plurality of reference pulses and pulse amplitude data obtained from the reproduced video signal.

REFERENCES:
patent: 4682246 (1987-07-01), Efron et al.
patent: 4757392 (1988-07-01), Awamoto et al.
patent: 4802024 (1989-01-01), Knowlton
IEEE Article Entitled "Wide Band Video Signal Recorder having Level and Linearity Corrector", Bannai et al., 6/86.
Seishi Sasaki et al., "Wide Band Signal Recorder having Level and Linearity Corrector" IEEE Transactions on Consumer Electronics, vol. CE.varies.32, No. 3, 8/86.
"VTR for Bandwidth-Compressed Hivision", National Technical Report vol. 32, No. 4, Aug. 1986, Seishi Sasaki et al.

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