Video signal reproducing apparatus in image fast locking system

Details Video signal reproducing apparatus in image fast locking system Video signal reproducing apparatus in image fast locking system

1993-06-11

1999-01-19

Tran, Thai

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386 65, 386 88, 386 90, H04N 576, H04N 592

Patent

active

058622942

ABSTRACT:
A video signal reproducing apparatus in a system for fast locking a reproduced image obtained from a recording medium where a time code signal is also recorded. The apparatus includes a memory for storing plural frames of the video signal, a time code comparator for generating a control signal by comparing the time code signal obtained from the recording medium with an external reference time code signal, and a reading controller for controlling the memory and selectively reading one frame of the video signal therefrom in accordance with the control signal so that the time code signal corresponding to the video signal selectively read by the reading controller coincides with the reference time code signal. The video signal reproduced by the apparatus placed in a standby state at a preroll point can be raised to a stable normal reproduction state within a relatively short time. Such video signals retained in synchronism are sequentially stored in the frame memories and, after being delayed per frame, the video signal coincident with the external time code signal is selected, whereby the lock-in operation can be quickly completed to consequently reduce the amount of preroll.

REFERENCES:
patent: 4157571 (1979-06-01), Shu
patent: 4290081 (1981-09-01), Foerster
patent: 4612569 (1986-09-01), Ichinose
patent: 4698664 (1987-10-01), Nichols et al.
patent: 4802023 (1989-01-01), Williams
Patents Abstracts of Japan, vol. 7, No. 21, Jan. 27, 1983.
PCT/GB85/00081 International Patent Application, filed 28 Feb. 1985.

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