Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SEPARATING CIRCUIT OF VIDEO SIGNAL
Document Type and Number:
Japanese Patent JPS5640385
Kind Code:
A
Abstract:

PURPOSE: To make it possible to separate the luminance signal and the chroma signal accurately, by obtaining a delay time according to the reproducing speed.

CONSTITUTION: The horizontal synchronizing pulse is separated from the reproducing video signal by horizontal synchronizing separating circuit 20 and is supplied to frequency discriminator 21 and has frequency fluctuation detected with the horizontal synchronizing frequency as the center frequency, and the discrimination output corresponding to frequency fluctuation is supplied to VCO22. Now, when the VTR is switched to the first reproducing mode, the frequency of horizontal synchronizing pulses separated from the reproducing video signal is changed also according to mode switching, and the delay time of delay element 3 is changed according to the tape speed.


Inventors:
SATOU ICHITAROU
Application Number:
JP11634479A
Publication Date:
April 16, 1981
Filing Date:
September 11, 1979
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SONY CORP
International Classes:
H04N9/79; H04N9/87; (IPC1-7): H04N9/491



 
Previous Patent: リクレーマ

Next Patent: CHROMATICITY CORRECTING UNIT