Information signal recording medium reproducing apparatus with a

Details Information signal recording medium reproducing apparatus with a Information signal recording medium reproducing apparatus with a

1985-08-13

1988-04-05

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358336, 358342, 360 65, 369 48, 369107, 369124, H04N 576

Patent

active

047362570

ABSTRACT:
An information signal recording medium reproducing apparatus comprises an equalizer supplied with a frequency modulated composite video signal picked up from an information signal recording medium, a frequency demodulator for frequency-demodulating an output signal of the equalizer into a composite video signal, a synchronizing signal separating circuit for separating a horizontal synchronizing signal from the composite video signal, and a switching signal generating circuit for forming a switching signal from the horizontal synchronizing signal. The equalizer is supplied with the switching signal and has such a circuit construction that a frequency at which an output level versus frequency characteristic of the equalizer has a peak is reduced responsive to the switching signal during a predetermined time period in a vicinity of the front edge of the horizontal synchronizing signal to correct a distorted waveform of the frequency modulated composite signal caused by defects in the information signal recording medium.

REFERENCES:
patent: 4360829 (1982-11-01), Riddle
patent: 4509155 (1985-04-01), Masuda et al.
patent: 4512005 (1985-04-01), Okano

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