KR970067170A - Optimum image quality adjustment device for VTR tape playback - Google Patents
Optimum image quality adjustment device for VTR tape playback Download PDFInfo
- Publication number
- KR970067170A KR970067170A KR1019960005548A KR19960005548A KR970067170A KR 970067170 A KR970067170 A KR 970067170A KR 1019960005548 A KR1019960005548 A KR 1019960005548A KR 19960005548 A KR19960005548 A KR 19960005548A KR 970067170 A KR970067170 A KR 970067170A
- Authority
- KR
- South Korea
- Prior art keywords
- image quality
- sharpness
- microcomputer
- video
- envelope detection
- Prior art date
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- Television Signal Processing For Recording (AREA)
Abstract
본 발명은 브이티알 회로에 있어서, 테이프 재생시 비디오 신호 처리 과정에서 비디오 헤드에서 검출된 신호를 증폭한 후 엔벨로프 검출 전압을 마이콤에서 PWM 신호로 변환하여, 엔벨로프 검출 전납의 레벨에 따라 듀티를 결정한다. 이 결정된 듀티의 평균값을 얻기 위하여 적분회로를 거친 후에, 비디오 재생 처리부 내의 화질의 선명도 조정단에 입력되어 테이프의 열화 상태에 따라 최적의 화질의 선명도를 자동으로 조정해 주는 것을 특징으로 하는 장치이다.In the VTC circuit, after amplifying a signal detected in a video head in a video signal processing process during tape reproduction, the envelope detection voltage is converted from a microcomputer into a PWM signal, and a duty is determined according to the level of pre-envelope detection . And an adjustment circuit for obtaining an average value of the determined duty is input to a sharpness adjustment end of the image quality in the video reproduction processing section and automatically adjusts the sharpness of the optimum image quality according to the deterioration state of the tape.
그리고 상기의 장치에 부가하여, 사용자가 수동으로 화질의 선명도를 조정하고자 하는 경우에, 프리-앰프로부터 마이콤에 입력되는 엔벨로프 전압에 인터럽트를 걸어 리모콘에 의해서 수동으로 비디오 화질의 선명도를 조정하는 것을 특징으로 하는 장치이다.In addition to the above apparatus, when the user manually tries to adjust the sharpness of the image quality, the sharpness of the video image quality is manually adjusted by the remote controller by interrupting the envelope voltage input from the pre-amplifier to the microcomputer .
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.
제1도는 본 발명에 따른 최적의 화질 선명도 조정 장치의 구성을 나타내는 블록도, 제2A도는 비디오헤드에서 재생된 비디오 신호의 엔벨로프(ENVELOPE) 검출 파형도, 제2B도는 엔벨로프 파형의 샘플링(SAMPLING)후의 펄스폭변조(PWM: PULSWIDTH MODULATION. 이하, PWM 이라 칭함) 파형도, 제2C도는 PWM 파형을 적부한 후의 파형도.FIG. 1 is a block diagram showing the configuration of an optimum picture quality sharpness adjusting apparatus according to the present invention. FIG. 2A is an ENVELOPE detection waveform of a video signal reproduced in a video head. FIG. 2B is a diagram after SAMPLING of an envelope waveform. 2 is a waveform diagram of a pulse width modulation (PWM) waveform, and FIG. 2C is a waveform diagram after applying a PWM waveform.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960005548A KR970067170A (en) | 1996-03-04 | 1996-03-04 | Optimum image quality adjustment device for VTR tape playback |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960005548A KR970067170A (en) | 1996-03-04 | 1996-03-04 | Optimum image quality adjustment device for VTR tape playback |
Publications (1)
Publication Number | Publication Date |
---|---|
KR970067170A true KR970067170A (en) | 1997-10-13 |
Family
ID=66222125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019960005548A KR970067170A (en) | 1996-03-04 | 1996-03-04 | Optimum image quality adjustment device for VTR tape playback |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR970067170A (en) |
-
1996
- 1996-03-04 KR KR1019960005548A patent/KR970067170A/en not_active Application Discontinuation
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Legal Events
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A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
WITB | Written withdrawal of application |