KR960020422A

KR960020422A - How to auto search TV channels

Info

Publication number: KR960020422A
Application number: KR1019940029540A
Authority: KR
Inventors: 이장환
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1994-11-11
Filing date: 1994-11-11
Publication date: 1996-06-17

Abstract

본 발명은 텔레비전채널의 자동탐색방법에 관한 것으로, 채널선국입력에 따라 해당채널의 국부발진주파수를 기준으로 선택된 채널에서 동기신호의 유·무에 따라 그 최초의 국부발진주파수에 의한 선국작업의 종료 또는 동기신호의 검출시 AFT제어에 의한 왼도우서치작업으로 이행하여 최적의 국부발진주파수에 의한 선국작업을 행하는 컬러텔레비전에 있어서, 상기 윈도우서치시에 적용되는 AFT영역을 다수 영역으로 분할하고 그 분할된 AFT영역에서 탐색대상으로 되는 선국전압의 중심점이 존재되는 영역을 해당 채널의 선국영역으로 실정하여 저장하며, 그 저장된 선국영역을 기초로 해당 채널의 선국이 단시간에 수행되도록 한 것이다.The present invention relates to a method for automatic search of a television channel, the termination of the tuning operation by the first local oscillation frequency according to the presence or absence of a synchronization signal in the channel selected based on the local oscillation frequency of the channel according to the channel tuning input. Alternatively, in color television which shifts to left search operation by AFT control when detecting a synchronization signal and performs tuning operation by an optimal local oscillation frequency, the AFT area applied at the time of window search is divided into a plurality of areas and the division is performed. In the AFT region, the region in which the center point of the tuning voltage to be searched exists is actually stored as the tuning region of the corresponding channel, and the tuning of the corresponding channel is performed in a short time based on the stored tuning region.

Description

How to auto search TV channels

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명에 따른 텔레비전채널의 자동탐색방법을 설명하는 플로우차트이다.2 is a flowchart illustrating a method for automatically searching a television channel according to the present invention.

Claims

Window search operation by AFT control at the end of the tuning operation by the first local oscillation frequency or detection of the synchronization signal according to the presence or absence of the synchronization signal in the channel selected based on the local oscillation frequency of the corresponding channel according to the channel tuning input. In the color television which performs the tuning operation by the optimal local oscillation frequency, the AFT region applied in the window search is divided into a plurality of regions and the center point of the tuning voltage which is the search target in the divided AFT region exists. And setting and storing an area to be a channel selection area of a corresponding channel, and tuning the channel in a short time based on the stored channel selection area.

2. The method of claim 1, wherein the setting of the tuning area is performed by performing a preset change of channel tuning voltage with respect to preset tuning data, and adding or subtracting tuning data by the change to the first tuning data. A method for automatically searching television channels.

※ Note: The disclosure is based on the initial application.