Synchronization signal generator

Details Synchronization signal generator Synchronization signal generator

Filed on

1986-06-03

Date issued

1988-09-06

Examiner

Groody, James J.

Patent Class

Facsimile and static presentation processing

SubClass

Facsimile

SubSubClass

Specific signal processing circuitry

Other Related Categories

358150, 358153, 358158, 358319, 331 20, H04N 504, H04N 506

Type

Patent

Status

active

Patent number

047697040

Description

ABSTRACT:
A synchronization signal generator for NTSC, PAL or PALM system, capable of synchronizing by external signal; wherein horizontal information signal of external synchronization signal is processed through a stabilization circuit, and its output is frequency-divided by a counter, and then only such horizontal scanning information parts that makes phase relation of the horizontal synchronization signal and the color sub-carrier to a predetermined relation is extracted, and by resetting the counter based on the extracted information, to obtain SCH phase regulated signal.

REFERENCES:
patent: 3549792 (1970-12-01), Barclay
patent: 4122488 (1978-10-01), Mikado
patent: 4617594 (1986-10-01), Katagiri et al.

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