Method and apparatus for reducing a tracking displacement betwee

Details Method and apparatus for reducing a tracking displacement betwee Method and apparatus for reducing a tracking displacement betwee

1997-02-07

1999-05-04

Sniezek, Andrew L.

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386124, 360 18, 360 7712, H04N 5911

Patent

active

058995803

ABSTRACT:
A digital signal recording and/or reproducing apparatus and method can maintain a satisfactory continuity of a previously-recorded area and a postrecorded area by reducing a tracking displacement between the previously-recorded area and the postrecorded area. A signal from a playback amplifier (10) is supplied to a f1/f2 discriminating circuit (13), and a discriminated signal is supplied to a tracking information detector (14). A memory (15) is controlled by a system controller (100). Tracking information from the detector (14) is supplied to the memory (15) which independently memorizes tracking information signals of respective areas of a video signal, an audio signal, a subcode signal and an ITI signal. Tracking information signals of the respective areas memorized in the memory (15) are selected by a selector (16) formed of switches (16.sub.1 to 16.sub.4) and supplied to an averaging circuit (17). A tracking information signal averaged by the average circuit (17) is supplied to a servo circuit (8) which effects a tracking correction.

REFERENCES:
patent: 4602298 (1986-07-01), Nishitani et al.
patent: 5432655 (1995-07-01), Nakamura et al.

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