KR0123731B1 - 방송상태 자체진단회로 - Google Patents
방송상태 자체진단회로Info
- Publication number
- KR0123731B1 KR0123731B1 KR1019940014392A KR19940014392A KR0123731B1 KR 0123731 B1 KR0123731 B1 KR 0123731B1 KR 1019940014392 A KR1019940014392 A KR 1019940014392A KR 19940014392 A KR19940014392 A KR 19940014392A KR 0123731 B1 KR0123731 B1 KR 0123731B1
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- video signal
- broadcast
- intermediate frequency
- processing means
- Prior art date
Links
- 230000001360 synchronised effect Effects 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 12
- 238000004092 self-diagnosis Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
- H04N17/045—Self-contained testing apparatus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/74—Circuits for processing colour signals for obtaining special effects
- H04N9/75—Chroma key
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/52—Automatic gain control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
Description
Claims (2)
- 튜너를 통해 인가된 고주파수의 방송신호를 중간주파수로 변환하고, 인가된 방송신호중에서 비데오신호만을 분리하는 중간주파수 처리수단과, 상기 중간주파수 처리수단에 의해 분리된 비데오신호의 색차신호를 처리하는 크로마신호 처리수단과, 상기 크로마신호 처리된 비데오신호를 처리하는 비데오신호 처리수단과, 비데오신호 처리된 영상신호를 화면에 디스플레이하는 영상재생장치에 있어서, 상기 중간주파수 처리수단에서 출력된 비데오신호의 수평동기신호를 검출하는 수평동기신호 검출수단; 상기 수평동기신호 검출수단에 의해 검출된 수평동기신호의 개수를 카운트하여 소정의 기준 수평동기신호 개수와 비교하고, 상기 중간주파수 처리수단에서 출력된 비데오신호의 직류전압레벨을 검출하여 소정의 기준전압레벨과 비교하며, 상기 각각 비교된 결과가 기준 이하의 신호이면 노이즈 발생원인이 방송상태라고 판단하여, 판단결과를 상기 비데오신호 처리수단에 온스크린 디스플레이신호를 출력하는 마이크로 컴퓨터를 구비하는 방송상태 자체진단회로.
- 제1항에 있어서, 상기 마이크로 컴퓨터는, 상기 수평동기신호 검출수단으로부터 인가된 수평동기신호를 카운팅하는 카운팅수단과; 상기 중간주파수 처리수단으로부터 인가된 아날로그 형태의 비데오신호를 디지탈 형태의 비데오신호로 변환하는 아날로그/디지탈 변환수단과; 상기 아날로그/디지탈 변환수단에 의해 변환된 디지탈 형태의 방송신호의 전압레벨을 검출하는 직류전압 검출수단과; 상기 수평동기신호 카운터로부터 인가된 수평동기신호의 개수와 소정의 기준 수평동기신호의 개수를 비교하고, 상기 직류전압 검출수단으로부터 인가된 전압레벨과 기준전압레벨을 비교하여 비교된 결과에 따라 상기 비데오신호 처리수단에 제어신호를 출력하는 방송상태 판별수단으로 구성된 방송상태 자체진단회로.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940014392A KR0123731B1 (ko) | 1994-06-23 | 1994-06-23 | 방송상태 자체진단회로 |
US08/470,120 US5712690A (en) | 1994-06-23 | 1995-06-06 | Apparatus and method for diagnosing received broadcast signals using sync signals and signal level |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940014392A KR0123731B1 (ko) | 1994-06-23 | 1994-06-23 | 방송상태 자체진단회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR960003311A KR960003311A (ko) | 1996-01-26 |
KR0123731B1 true KR0123731B1 (ko) | 1997-11-26 |
Family
ID=19386059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019940014392A KR0123731B1 (ko) | 1994-06-23 | 1994-06-23 | 방송상태 자체진단회로 |
Country Status (2)
Country | Link |
---|---|
US (1) | US5712690A (ko) |
KR (1) | KR0123731B1 (ko) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7116959B1 (en) * | 1997-09-30 | 2006-10-03 | Harman Becker Automotive Systems Gmbh | Apparatus for selecting a receiver among a plurality of receivers in a diversity receiver system based upon automatic gain correction |
JPH11338448A (ja) * | 1998-04-27 | 1999-12-10 | Samsung Electronics Co Ltd | オンスクリ―ンディスプレイ画面の出力方法および出力装置 |
KR100308299B1 (ko) * | 1999-06-03 | 2001-10-29 | 구자홍 | 튜닝 미세 조정 방법 |
JP3573663B2 (ja) * | 1999-09-21 | 2004-10-06 | 松下電器産業株式会社 | デジタル放送復調装置 |
US20030028891A1 (en) * | 2001-08-03 | 2003-02-06 | General Instrument Corporation | System and method for diagnosing RF signal strength at a set-top terminal |
KR20030048982A (ko) * | 2001-12-13 | 2003-06-25 | 삼성전자주식회사 | 수신신호상태 표시장치 및 방법 |
KR100449739B1 (ko) * | 2002-09-19 | 2004-09-22 | 삼성전자주식회사 | 디스플레이장치 및 디스플레이장치에 입력되는 신호의체크방법 |
US7972206B2 (en) * | 2002-11-20 | 2011-07-05 | Wms Gaming Inc. | Gaming machine and display device therefor |
JP2005094399A (ja) * | 2003-09-18 | 2005-04-07 | Ricoh Co Ltd | デジタルビデオエンコーダ装置 |
KR101349798B1 (ko) * | 2006-10-27 | 2014-01-10 | 엘지전자 주식회사 | 동작제어방법 및 이를 구현할 수 있는 전자기기 |
US20080283379A1 (en) * | 2007-05-18 | 2008-11-20 | Teledyne Technologies Incorporated | Coaxial switch with reduced tribo-electric charge accumulation |
US7876185B2 (en) * | 2008-05-05 | 2011-01-25 | Teledyne Technologies Incorporated | Electromagnetic switch |
TW201228388A (en) * | 2010-12-28 | 2012-07-01 | Aba Electronics Technology Co Ltd | Image automatic gain adjustment method |
CN102595084A (zh) * | 2011-01-06 | 2012-07-18 | 瑞成奈米股份有限公司 | 影像自动增益调整方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0740727B2 (ja) * | 1985-07-08 | 1995-05-01 | ソニー株式会社 | 車載テレビ |
JPS63234678A (ja) * | 1987-03-23 | 1988-09-29 | Sony Corp | テレビジヨン受像機 |
US4837623A (en) * | 1987-12-17 | 1989-06-06 | North American Philips Corporation | Television interrupt circuit |
KR950009205B1 (ko) * | 1988-07-04 | 1995-08-16 | 삼성전자주식회사 | 위성 방송 수신기의 신호유무 채널 표시 장치 |
JP3042649B2 (ja) * | 1992-10-08 | 2000-05-15 | 株式会社富士通ゼネラル | オンスクリーン表示回路 |
-
1994
- 1994-06-23 KR KR1019940014392A patent/KR0123731B1/ko not_active IP Right Cessation
-
1995
- 1995-06-06 US US08/470,120 patent/US5712690A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5712690A (en) | 1998-01-27 |
KR960003311A (ko) | 1996-01-26 |
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