KR970019346A - Analog / Digital Converter of Composite Video Equipment and Its Method - Google Patents
Analog / Digital Converter of Composite Video Equipment and Its Method Download PDFInfo
- Publication number
- KR970019346A KR970019346A KR1019950028628A KR19950028628A KR970019346A KR 970019346 A KR970019346 A KR 970019346A KR 1019950028628 A KR1019950028628 A KR 1019950028628A KR 19950028628 A KR19950028628 A KR 19950028628A KR 970019346 A KR970019346 A KR 970019346A
- Authority
- KR
- South Korea
- Prior art keywords
- gain
- analog
- video signal
- digital
- output
- Prior art date
Links
Classifications
-
- 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
- H04N5/148—Video amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
- Picture Signal Circuits (AREA)
Abstract
본 발명은 비디오 신호 출력수단에서 출력 아날로그 신호를 이득제어 수단에서 출력되는 이득 제어 신호에 따라 증폭하는 증폭 수단과, 상기 증폭 수단에서 출력되는 아날로그 비디오 신호를 디지털신호로 변환하여 디지털 시그날 프로세서에서 공급하는 아날로그/디지탈 변환수단과, 상기 아날로그/디지탈 변호나 수단에서 출력되는 비디오 레벨을 표준 레벨과 비교하여 이에 해당된 이득을 산출하는 이득 검출 수단과, 상기 이득 검출 수단에서 산출된 이득을 비디오 라인간의 주파수를 이용하여 저역 통화시켜 급격한 이득 변화를 줄어 이득 제어 수단에 공급하는 루프필터와 상기 아날로그/디지탈 변환 수단에서 비디오 신호가 출력되는 가를 검출하여 비정상적인 비디오 신호가 검출되면 루프필터에 누적되어 있는 누적치를 제거하기 위한 소정의 제어신호를 출력하는 비디오 신호 검출 수단으로 이루어져 정상적인 비디오 신호가 없는 기간에 루프필터에 누적되는 이득이 항상 표준 이득을 유지하기 때문에 정상적인 비디오 신호가 입력되면 화면이 포화되는 현상을 방지하는 복합영상기기의 아날로그/디지탈 및 그 방법에 관한 것이다.The present invention provides amplifying means for amplifying an output analog signal from a video signal output means according to a gain control signal output from a gain control means, and converting an analog video signal output from the amplifying means into a digital signal and supplying the digital signal to a digital signal processor. An analog / digital converting means, a gain detecting means for comparing the video level output from the analog / digital representation or means with a standard level and calculating a gain corresponding thereto, and a gain calculated by the gain detecting means with a frequency between video lines. It detects whether the video filter is outputted from the loop filter and the analog / digital converting means by reducing the sudden change in gain by low-frequency communication using the low pass, and removes the accumulated value accumulated in the loop filter when an abnormal video signal is detected. Predetermined It is composed of video signal detection means for outputting control signal, so that the gain accumulated in the loop filter always maintains the standard gain in the absence of normal video signal. It relates to an analog / digital and its method.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제3도는 본 발명에 따른 복합영상기기의 아날로그/디지탈 변환장치를 나타낸 도면,3 is a view showing an analog / digital conversion device of a composite video device according to the present invention;
제5도는 제3도에 도시된 복합영상기기의 아날로그/디지탈 변환장치의 작동을 설명하는 플로우챠트.FIG. 5 is a flowchart for explaining the operation of the analog / digital converter of the composite video device shown in FIG.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950028628A KR0159222B1 (en) | 1995-09-01 | 1995-09-01 | Apparatus and method for changing analog digital of image apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950028628A KR0159222B1 (en) | 1995-09-01 | 1995-09-01 | Apparatus and method for changing analog digital of image apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970019346A true KR970019346A (en) | 1997-04-30 |
KR0159222B1 KR0159222B1 (en) | 1999-01-15 |
Family
ID=19425882
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950028628A KR0159222B1 (en) | 1995-09-01 | 1995-09-01 | Apparatus and method for changing analog digital of image apparatus |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0159222B1 (en) |
-
1995
- 1995-09-01 KR KR1019950028628A patent/KR0159222B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0159222B1 (en) | 1999-01-15 |
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