Patent ID: 6292622
Filing Date: 2001-09-18
Classification: G11B,H04N

Abstract:
A method for low-speed reproducing in a video cassette recorder (VCR) having a pair of main heads for normal-speed reproducing and at least two additional heads neighboring the main heads, comprising the steps of:detecting a regularly repeated period from an envelope waveform of a video signal reproduced by the main heads wherein the period is a number of head switching pulses corresponding to a least common multiple of the speed to be reproduced;comparing a voltage level of the envelope waveform detected by the main heads with a voltage level of an envelope waveform detected by the additional heads by generating a pseudo head switching pulse signal for switching the operation state of the main heads and the additional heads according to the detected period; anddetecting a reproduced signal from one of the main and the additional heads which has the envelope waveform having the higher voltage level.