Time base corrector

Details Time base corrector Time base corrector

Category

H - Electricity

Subcategory

04

Subsubcategory

N

CPC

350/87, 352/18.3

IPC codes

H04N 5/04 (2006.01) H04N 5/956 (2006.01)

Type

Patent

Patent number

CA 1245348

Description

ABSTRACT OF THE DISCLOSURE In a time base corrector incorporated in a VTR, if a time during which a vertical synchronizing signal is written in a memory unit exceeds one horizontal period segment, the video signal stored at the first address of the memory unit is dropped out during data reading operation. To overcome the above problem, a write address designation signal is once latched in response to a vertical synchronizing signal; a predetermined number is subtracted from the latched address number; the subtracted address number is loaded in a counter in response to a reference vertical synchronizing signal and is incremented in response to a reference horizontal synchronizing signal in order to shift the read start address, thus preventing video signals stored in the memory unit from being dropped off.

Application Number

490837

Affiliated with

Also associated with

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