KR950004910A

KR950004910A - Shadow image removal device of video equipment

Info

Publication number: KR950004910A
Application number: KR1019930014866A
Authority: KR
Inventors: 권칠주
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1993-07-31
Filing date: 1993-07-31
Publication date: 1995-02-18

Abstract

본 발명은 그림자 상을 빠르게 제거하기에 적합한 영상 기기의 그림자 상 제거 장치에 관한 것으로, 종래에는 탭 이득 계수 레지스터와 횡단선 필터가 직렬로 접속되어 있기 때문에 전체적인 탭 지연은 근접 영역과 통상 영역의 합이되므로 결국, 그림자 상 제거 시간이 많이 걸렸으나, 본 발명에서는 그림자 상 값 산출부(6)와 횡단선 필터(23) 사이에 근접 영역 탭 이득 레지스터(20) 및 통상 영역 탭 이득 레지스터(21)를 병렬로 접속하므로써 그림자 상 제거에 의한 시간 지연이 횡단선 필터(23)의 무한 충격 응답 필터에 의해서만 발생되어 그림자 상이 보다 빨리 제거되므로 상기 결점을 개선시킬 수 있는 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shadow image removal device of an imaging device suitable for quickly removing a shadow image. In the related art, since the tap gain coefficient register and the cross-line filter are connected in series, the overall tap delay is the sum of the proximity region and the normal region. As a result, although the shadow image removal time was long, in the present invention, the near region tap gain register 20 and the normal region tap gain register 21 are disposed between the shadow image value calculating unit 6 and the transverse line filter 23. By connecting in parallel, the time delay due to the elimination of the shadow image is generated only by the infinite shock response filter of the transverse filter 23, so that the shadow image can be removed more quickly.

Description

Shadow image removal device of video equipment

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 2 도는 본 발명 텔레비젼의 그림자 상 제거를 나타낸 블럭도.2 is a block diagram showing the removal of the shadow image of the television of the present invention.

Claims

An antenna 1 for detecting a broadcast signal; A tuning unit (2) for tuning a specific broadcast signal among the broadcast signals of the antenna (1); An intermediate frequency generator (3) for converting a specific broadcast signal of the tuning unit (2) into an intermediate frequency signal; An image detector (4) for inputting an intermediate frequency signal of the intermediate frequency generator (3) to detect a composite video signal; An A / D converter (5) for converting the composite video signal of the image detector (4) into a digital signal; A shadow image value calculation unit for characterizing the current channel and grasping the position of the maximum value after field operation of a reference signal transmitted from the A / D conversion unit 5 to separately determine a shadow image from a broadcasting station ( 6); A gain register unit 22 for receiving the signal of the shadow image value calculating unit 6 and storing the gain of each tap; The gain of each tap of the gain register section 22 is input to the shock response filter and the infinite shock response filter, respectively, and a transverse line filter for outputting a signal that is corrected in advance or backward in time without delay due to elimination of the shadow image in the proximity region. 23; And an image output unit (11) connected between the transverse line filter (23) and the A / D converter (5) to output a composite image signal from which the shadow image is removed.

2. The apparatus of claim 1, wherein the gain register section (22) comprises: a proximity region tap gain register (20) which is connected to the shadow image value calculating section (6) and stores a gain by the shadow image in the proximity region; And a normal region tap gain register (21) connected to said shadow image value calculating section (6) for storing gain by the shadow image of the normal region.

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