Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1995-11-06
1997-07-15
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
386 81, G11B 1552
Patent
active
056488793
ABSTRACT:
An apparatus for controlling the phase of a video signal has a track information detector for extracting track pair number data allotted to every N tracks from a reproduced signal when a rotary head is locked in phase with a reference signal, an FG generator, an FG counter for counting pulses of a capstan motor frequency signal, and a microcomputer for producing shift quantity data representing a shift quantity by which the rotary head is to be shifted to a target phase lock position, based on a value indicated by the track pair number data and a value indicated by the count from the FG counter, and controlling a capstan motor based on the shift quantity data, and output signals from a speed detector and a phase detector. The apparatus is capable of preventing an asynchronous condition from occurring upon switching between internal and external signals in an A/B editing process or the like.
REFERENCES:
patent: 4811130 (1989-03-01), Takayama
patent: 5438458 (1995-08-01), Honjo
patent: 5523895 (1996-06-01), Takayama
patent: 5546248 (1996-08-01), Sakakibara et al.
Frommer William S.
Psitos Aristotelis
Sinderbrand Alvin
Sony Corporation
Wilson James T.
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