Video signal processing circuit

Details Video signal processing circuit Video signal processing circuit

1982-03-22

1984-11-06

Richardson, Robert L.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

307542, 358166, 358167, 358340, 358330, H04N 578, H04N 521

Patent

active

044815476

ABSTRACT:
In a circuit for processing a video signal to be recorded, for example, in a VTR, as a frequency modulation of a relatively high frequency carrier, and in which, in advance of such frequency modulation and for the purpose of improving the signal-to-noise ratio particularly in respect to the so-called FM noise, the video signal is pre-emphasized and then clipped at a predetermined level for avoiding over-modulation; a compensating circuit responds to the pre-emphasized video signal for widening those overshoots thereof which are to be clipped and thereby avoiding waveform distortions that would otherwise occur at the locations of the clipped overshoots when the recorded signal is reproduced, frequency demodulated and then de-emphasized complementarily to the original pre-emphasis.

REFERENCES:
patent: 3980815 (1976-09-01), Kaneko
patent: 4198650 (1980-04-01), Hongu et al.
patent: 4363053 (1982-12-01), Kanamoto et al.

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