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Patent Searching and Data


Title:
SKEW CORRECTION SYSTEM
Document Type and Number:
Japanese Patent JPH0316486
Kind Code:
A
Abstract:

PURPOSE: To always obtain an excellent variable speed reproducing picture in each variable speed reproduction mode by providing a 1st switch means switching and selecting an input reproduction video signal and an output video signal from a 1st minute delay means at each production of a 1/2H skew detection pulse and a 2nd switch means selecting an output video signal of the 2nd minute delay means and the output video signal of the 1st switch means.

CONSTITUTION: A mode discrimination circuit 7 generates a mode decision signal (d) representing a set variable speed mode and a switch circuit 3 is controlled by using the mode decision signal (d) as a control signal and an output of a minute delay circuit 2 with a minute delay corresponding to the set variable speed reproduction mode is selected. Then a reproduction video signal (f) from a switch circuit 4 subjected to 1/2H correction is fed to a switch circuit 11 and also to a 1H delay circuit 8. The video signal (g) delayed by nearly 1H by the 1H delay circuit 8 is fed to a minute delay circuit 9 with several kinds of minute delays and respective outputs retarded by respective delays are fed to the switch circuit 10.


Inventors:
HANIYU HIROYUKI
YATSUGI FUMISHIGE
Application Number:
JP14958389A
Publication Date:
January 24, 1991
Filing Date:
June 14, 1989
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
H04N5/93; H04N5/95; H04N9/87; (IPC1-7): H04N5/93; H04N5/95; H04N9/87
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)