KR970060861A - Frequency characteristic correction device - Google Patents

Frequency characteristic correction device Download PDF

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Publication number
KR970060861A
KR970060861A KR1019960000540A KR19960000540A KR970060861A KR 970060861 A KR970060861 A KR 970060861A KR 1019960000540 A KR1019960000540 A KR 1019960000540A KR 19960000540 A KR19960000540 A KR 19960000540A KR 970060861 A KR970060861 A KR 970060861A
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KR
South Korea
Prior art keywords
signal
composite video
receiving
video signal
frequency band
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KR1019960000540A
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Korean (ko)
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KR100197596B1 (en
Inventor
이태성
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김광호
삼성전자 주식회사
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Priority to KR1019960000540A priority Critical patent/KR100197596B1/en
Publication of KR970060861A publication Critical patent/KR970060861A/en
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Publication of KR100197596B1 publication Critical patent/KR100197596B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)

Abstract

본 발명은 영상재생장치의 주파수특성 보정장치에 관한 것이다. 본 발명은 입력되는 복합영상신호를 주파수대역별로 나누어, 각 주파수대역별로 얻은 차분값을 이용하여 보정신호를 발생한다. 그리고, 이러한 보정신호를 입력받은 복합영상신호에 더해주므로서 왜곡된 주파수특성을 보정한다. 따라서, 본 발명은 전송계나 각종 신호처리계를 거치는동안 영상신호의 주파수특성에 발생하는 왜곡을 적응적으로 보정해 주므로써, 최적의 주파수특성을 갖는 영상신호를 출력할 수 있도록 한다.The present invention relates to an apparatus for correcting frequency characteristics of an image reproducing apparatus. The present invention divides input composite video signals according to frequency bands and generates correction signals using difference values obtained for respective frequency bands. Then, the correction signal is added to the received composite video signal, so that the distorted frequency characteristic is corrected. Therefore, the present invention adaptively corrects distortion occurring in the frequency characteristics of a video signal while passing through a transmission system or various signal processing systems, thereby outputting an image signal having an optimum frequency characteristic.

Description

주파수특성 보정장치Frequency characteristic correction device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제1도는 본 발명에 의한 주파수특성 보정장치을 나타낸 구성도.FIG. 1 is a configuration diagram showing a frequency characteristic correcting apparatus according to the present invention; FIG.

제2도는 제1도의 타이밍제어부(10)를 나타낸 상세구성도.FIG. 2 is a detailed block diagram showing the timing control section 10 of FIG. 1;

제3도는 제1도의 차분검출부(3n)를 나타낸 상세구성도.FIG. 3 is a detailed configuration diagram showing a difference detection unit 3n of FIG. 1;

Claims (7)

수직귀선구간에 주파수특성 보정용 신호가 삽입되어 전송되는 복합영상신호를 입력받아 왜곡된 주파수특성을 보정하기 위한 영상재생장치에 있어서, 상기 복합영상신호를 입력받아 수직귀선구간중 상기 주파수특성 보정용 신호가 삽입된 구간동안 게이트신호를 발생하는 타이밍제어부 ; 상기 복합영상신호와 상기 게이트신호를 입력받아, 상기 게이트신호가 발생하는 동안 상기 복합영상신호를 소정의 주파수대역별로 분할하여 출력하는 대역통과필터군; 상기 각 주파수 대역 신호들을 입력받아 기설정한 기준레벨값과의 차분에 해당하는 보정신호들을 발생하는 보정신호발생부 및 상기 복합영상신호와 상기 보정신호들을 가산하여 주파수특성이 보정된 복합영상신호를 출력하는 가산부를 포함하는 주파수특성 보정장치.A video reproduction apparatus for receiving a composite video signal transmitted with a frequency characteristic correction signal inserted in a vertical retrace interval and correcting a distorted frequency characteristic, the apparatus comprising: A timing controller for generating a gate signal during the inserted period; A band pass filter group for receiving the composite video signal and the gate signal and dividing the composite video signal by a predetermined frequency band while the gate signal is generated; A correction signal generator for receiving the frequency band signals and generating correction signals corresponding to a difference between the frequency band signals and a predetermined reference level value, and a composite video signal having a frequency characteristic corrected by adding the composite video signal and the correction signals, And an adder for outputting the added signal. 제1항에 있어서, 상기 타이밍제어부는 상기 복합영상신호를 입력받아 수직 및 수평동기신호를 검출하는 동기신호검출기; 상기 동기신호검출기로부터 인가받는 동기신호들을 이용하여 상기 복합영상신호의 라인을 계수하는 카운터 및 상기 카운터로부터의 계수값이 상기 수직귀선구간중 기설정된 주파수 특성 보정용 신호가 삽입된 라인을 나타낼 때 상기 게이트신호를 발생하는 게이트신호발생기로 구성되는 것을 특징으로 하는 주파수특성 보정장치.The apparatus of claim 1, wherein the timing controller comprises: a sync signal detector for receiving the composite video signal and detecting vertical and horizontal sync signals; A counter for counting the lines of the composite video signal using the sync signals supplied from the sync signal detector and a counter for counting lines of the composite video signal when the count value from the counter indicates a line in which a predetermined frequency characteristic correction signal is inserted, And a gate signal generator for generating a signal. 제2항에 있어서, 상기 카운터는 상기 동기신호검출기로부터 인가받는 수평동기신호를 이용하여 라인을 계수하는 것을 특징으로 하는 주파수특성 보정장치.3. The apparatus of claim 2, wherein the counter counts a line using a horizontal sync signal received from the sync signal detector. 제2항에 있어서, 상기 카운터는 시스템클럭을 입력받아 라인을 계수하는 것을 특징으로 하는 주파수특성 보정장치.The apparatus of claim 2, wherein the counter receives a system clock and counts a line. 제1항에 있어서, 상기 보정신호발생부는 상기 각 주파수대역 신호들을 입력받아 각각의 레벨을 검출하는 레벨검출부; 상기 레벨검출부로부터 검출된 레벨값들과 기설정한 기준레벨값들을 비교하여 그 차분값들을 검출하는 차분검출부 및 상기 차분검출부로부터 검출된 차분값들을 이용하여 상기 각 주파수대역 신호들의 이득을 조절하는 이득조절부로 구성되는 것을 특징으로 하는 주파수특성 보정장치.2. The apparatus of claim 1, wherein the correction signal generator comprises: a level detector for receiving each of the frequency band signals and detecting each level; A difference detecting unit for comparing the level values detected by the level detecting unit with predetermined reference level values to detect difference values thereof and a gain adjusting unit for adjusting a gain of the frequency band signals using the difference values detected by the difference detecting unit Wherein the frequency characteristic correcting unit comprises: 제5항에 있어서, 상기 레벨검출부는 상기 각 주파수대역 신호들을 입력받아 정류하는 정류기 및 상기 정류기를 통해 정류된 신호를 입력받아 저역성분만 출력시키는 저역통과필터로 구성되는 것을 특징으로 하는 주파수특성 보정장치.6. The apparatus of claim 5, wherein the level detector comprises a rectifier for receiving and rectifying the frequency band signals and a low pass filter for receiving a signal rectified through the rectifier and outputting only low frequency components. Device. 제5항에 있어서, 상기 레벨검출부는 상기 각 주파수대역 신호들을 입력받아 엣지를 검출하는 엣지검출부로 구성되는 것을 특징으로 하는 주파수특성 보정장치.6. The apparatus of claim 5, wherein the level detector comprises an edge detector for receiving an edge of each of the frequency band signals. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960000540A 1996-01-12 1996-01-12 Apparatus for correcting frequency character KR100197596B1 (en)

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KR100197596B1 KR100197596B1 (en) 1999-06-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7411629B2 (en) 2004-06-21 2008-08-12 Samsung Electronics Co., Ltd. Method and apparatus for correcting frequency characteristics of carrier chrominance signal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6307427B1 (en) * 1998-08-06 2001-10-23 Fujitsu Limited Filter characteristic regulating apparatus and regulating method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7411629B2 (en) 2004-06-21 2008-08-12 Samsung Electronics Co., Ltd. Method and apparatus for correcting frequency characteristics of carrier chrominance signal

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