Tracking control method and apparatus for video recorder/player

Details Tracking control method and apparatus for video recorder/player Tracking control method and apparatus for video recorder/player

1997-06-17

2000-04-25

Tran, Thai

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386 80, 386 78, H04N 595

Patent

active

060553561

ABSTRACT:
A tracking control method and apparatus is provided for producing an optimum picture without noise during a slow reproducing mode of a video recorder/player, such as still mode. According tot the method and apparatus, an envelope of a composite video signal picked up from the five heads is sampled at a sampling period corresponding to head switching pulses when the recorder player is changed over to the slow reproducing mode, then analysis is performed to determine whether the sampled composite envelope has maximum uniformity. If the amplitude uniformity of the sampled composite envelope is not already maximum, the tracking value for use by the servo and capstan motor is automatically controlled so that the amplitude uniformity of the sampled signal becomes a maximum.

REFERENCES:
patent: 4613914 (1986-09-01), Kobori et al.
patent: 5684916 (1997-11-01), Hong
patent: 5892884 (1999-04-01), Sugiyama et al.

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