Circuit for increasing the slopes of a video signal

Details Circuit for increasing the slopes of a video signal Circuit for increasing the slopes of a video signal

1985-01-11

1987-05-19

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358167, 358 37, H04N 5208

Patent

active

046672346

ABSTRACT:
The circuit provides a correction signal generated by two-fold differentiation of the video signal which is then added to the video signal. According to the invention, a high pass filter is disposed in the path of the correction signal. The corrected video signal is limited to the black level value and to the white level value with the amplitude limiters. This assures the optimum operational mode of the circuit independent of the frequency course of the frequencies of the video signal in each case.

REFERENCES:
patent: 4030121 (1977-06-01), Faroudja
patent: 4047108 (1977-09-01), Bijher et al.
patent: 4295164 (1981-10-01), Rauser
patent: 4414564 (1983-11-01), Hitchcock

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