AUTO-IMAGE COMPENSATING APPARATUS TO TRACKING LEVEL OF VIDEO HEAD

摘要

The present invention relates to a VCR, comprising: a head (11) for reading a video signal from a video tape, a video preamplifier (15) for amplifying the read video signal, and a video signal separated from the luminance signal and a color signal for processing. In a VCR having a luminance / color signal processing section 20 and a chroma IC 50 for processing luminance signals and color signals as RGB signals and outputting them externally, an envelope for detecting an envelope of a video signal read out by the head 11 The system controller 35 which compares the detector 12, the envelope applied by the envelope detector 12, and the reference envelope supplied by the reference envelope generator 40, and controls the operation of the signal converter 60 according to the result. ), A clamp circuit 25 and an integrating circuit 30 for converting the envelope into a digital signal, and a control signal output from the system control unit 35 are applied to operate a switching signal corresponding to the digital level of the envelope. A signal converter which generates and drives the sharpness adjuster 65 and a sharpness adjuster 65 that adjusts the sharpness voltage output from the microprocessor 45 and applied to the chroma IC 50, thereby providing a reproduction signal. The picture quality can be smoothed according to the condition.