Video tape transport servo for variable tape speed control

Details Video tape transport servo for variable tape speed control Video tape transport servo for variable tape speed control

1986-03-06

1987-07-07

Richardson, Robert L.

Dynamic magnetic information storage or retrieval

Record editing

360 103, 360 73, H04N 5782, G11B 1546

Patent

active

046790985

ABSTRACT:
A capstan servo for moving video tape with variable speed during playback controls the tape speed according to time period inputs. The input specifies the number of seconds per hour of program length, for example, that a segment of recorded video information is to be expanded or compressed compared relative to its normal real time playback length. The speed of tape transport during playback is varied by locking the reproduced control track vertical sync signal to a synthesized time adjustable reference signal.

REFERENCES:
patent: 4215362 (1980-07-01), Ravizza
patent: 4261020 (1981-04-01), Beeson et al.
patent: 4287538 (1982-09-01), Sakamoto et al.
patent: 4308560 (1981-12-01), Ravizza
patent: 4318140 (1982-03-01), Shigeta
patent: 4358798 (1982-11-01), Hedlund et al.
patent: 4393415 (1983-07-01), Hurst

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