KR960003665B1 - 텔레비젼 수상기용 색복조회로의 i축검출회로 - Google Patents
텔레비젼 수상기용 색복조회로의 i축검출회로 Download PDFInfo
- Publication number
- KR960003665B1 KR960003665B1 KR1019920002910A KR920002910A KR960003665B1 KR 960003665 B1 KR960003665 B1 KR 960003665B1 KR 1019920002910 A KR1019920002910 A KR 1019920002910A KR 920002910 A KR920002910 A KR 920002910A KR 960003665 B1 KR960003665 B1 KR 960003665B1
- Authority
- KR
- South Korea
- Prior art keywords
- circuit
- phase
- axis
- output
- subsampling
- Prior art date
Links
- 238000001514 detection method Methods 0.000 title claims description 36
- 238000005070 sampling Methods 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 238000012935 Averaging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 230000001934 delay Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
- H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
- H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
- H04N11/146—Decoding means therefor
-
- 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
- H04N9/66—Circuits for processing colour signals for synchronous demodulators
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
Description
Claims (3)
- 크로마신호(샘풀링주파수 f1)를, 주파수 f2(f1/n)에 의해서, 또한, 1클록(1/f1)씩 시프트한 N상의 서브샘플링펄스에 의해서 서브샘플링을 행하는 제1상에서부터 제N상용의 서브샘플링회로와 ; 컬러버스트게이트신호에 의해서 동작이 제어되어 상기 N상의 서브샘플링펄스중 1개를 I축의 위상펄스로서 선택하기 위한 선택신호를 얻는 I축판정회로와 ; 상기 I축판정회로의 선택신호에 의거해서 상기 N상의 서브샘플링펄스중 1개를 I축의 위상펄스로서 선택하여 출력하는 선택회로와 ; 상기 크로마신호를 상기 선택회로로부터 출력된 I축의 위상펄스에 의해서 서브샘플링을 행하여 I축검파출력을 얻는 제N+1서브샘플링회로를 가진 것을 특징으로 하는 텔레비젼 수상기용 색복조회로의 I축검출회로.
- 제1항에 있어서, 상기 I축판정회로는, 제1상에서부터 제N상의 서브샘플링펄스가 입력되고, 상기 컬러버스트게이트신호에 응해서 상기 서브샘플링펄스를 각각 가산평균하는 N개의 가산평균회로와 ; 이 N개의 가산평균회로의 가산평균출력중 최대치를 표시하는 출력을 검출하는 최대치검출회로와 ; 상기 N개의 가산평균회로의 가산평균출력을 계수 K배하는 제1상에서부터 제N상용의 K배회로와 ; 제m상(1≤m≤N)용의 K배회로의 출력과, 상기 제m+1상용의 가산평균회로(단, m+1N의 경우에는 제1상용의 가산평균회로)의 출력을 비교하는 제m상(1≤m≤N)용의 비교기와 ; 상기 최대치검출회로 및 제m상(1≤m≤N)용의 비교기의 각 출력으로부터 I축의 위상펄스를 선택하기 위한 선택신호를 얻는 I축선택회로를 가진 것을 특징으로하는 텔레비젼 수상기용 색복조회로의 I축검출회로.
- 제1항에 있어서, 상기 I축판정회로는, 제1상에서부터 제N상의 서브샘플링펄스가 입력되고, 상기 컬러버스트게이트신호에 응해서 상기 서브샘플링펄스를 가산평균하는 N개의 가산평균회로와 ; N개의 병렬가산평균출력을 직렬데이터로 변환하는 데이터포맷변환회로와 ; 상기 데이터포맷변환회로의 출력중 최대치를 표시하는 출력을 검출하는 최대치검출회로와 ; 상기 데이터포맷변환회로의 출력을 계수 K배하는 K배회로와 ; 이 K배회로의 출력을 1클록지연시키는 지연회로와 ; 상기 지연회로 및 상기 데이터포맷변환회로의 양 출력을 비교하는 비교기와 ; 상기 비교기 및 상기 최대치검출회로의 양 출력으로부처 I축의 위상펄스를 선택하기 위한 선택신호를 얻는 I축선택신호를 가진것을 특징으로 하는 텔레비젼 수상기용 색복조회로의 I축검출회로.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3030115A JP2657328B2 (ja) | 1991-02-25 | 1991-02-25 | テレビジョン受像機用色復調回路のi軸検出回路 |
JP91-30115 | 1991-02-25 | ||
JP91-030115 | 1991-02-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR920017494A KR920017494A (ko) | 1992-09-26 |
KR960003665B1 true KR960003665B1 (ko) | 1996-03-21 |
Family
ID=12294786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019920002910A KR960003665B1 (ko) | 1991-02-25 | 1992-02-25 | 텔레비젼 수상기용 색복조회로의 i축검출회로 |
Country Status (3)
Country | Link |
---|---|
US (1) | US5317410A (ko) |
JP (1) | JP2657328B2 (ko) |
KR (1) | KR960003665B1 (ko) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5703660A (en) * | 1996-02-08 | 1997-12-30 | Cirrus Logic, Inc. | System and method for decoding a quadrature ampliture modulated signal |
JP2002344987A (ja) * | 2001-05-16 | 2002-11-29 | Mitsubishi Electric Corp | 位相補正回路、信号判別回路、位相補正方法及び信号判別方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1294701C (en) * | 1907-08-20 | 1992-01-21 | Norio Suzuki | Color television signal sampling clock phase control system |
US4463371A (en) * | 1982-05-28 | 1984-07-31 | Rca Corporation | Clock generation apparatus for a digital television system |
US4616252A (en) * | 1984-07-16 | 1986-10-07 | Rca Corporation | Sampled color difference signal processing system having a quadrature distortion reduction differentiator |
JPH0666954B2 (ja) * | 1985-08-07 | 1994-08-24 | 日本電気株式会社 | 色信号復調装置 |
NL8800320A (nl) * | 1988-02-10 | 1989-09-01 | Philips Nv | Kleurentelevisiesignaaldecodeerschakeling. |
-
1991
- 1991-02-25 JP JP3030115A patent/JP2657328B2/ja not_active Expired - Fee Related
-
1992
- 1992-02-19 US US07/836,752 patent/US5317410A/en not_active Expired - Fee Related
- 1992-02-25 KR KR1019920002910A patent/KR960003665B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US5317410A (en) | 1994-05-31 |
KR920017494A (ko) | 1992-09-26 |
JPH05176338A (ja) | 1993-07-13 |
JP2657328B2 (ja) | 1997-09-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0262647B1 (en) | Sample rate conversion system having interpolation function | |
US4463371A (en) | Clock generation apparatus for a digital television system | |
JPH0851646A (ja) | 多規格適合形ビデオ信号復号器及びビデオ信号復号化方法 | |
EP0351787B1 (en) | Video signal processing circuit | |
US4855815A (en) | Digital composite color video signal separating circuit with vertical correlation weighting function | |
US5280345A (en) | Jitter correction circuit for reducing jitter components of a luminance signal in video information compression | |
GB2069288A (en) | Digital colour encoders | |
EP0078052B1 (en) | Pal digital video signal processing arrangement | |
KR960003665B1 (ko) | 텔레비젼 수상기용 색복조회로의 i축검출회로 | |
US4785352A (en) | Sampled data amplitude detector as for an AGC multiplier | |
US4562456A (en) | Analog-to-digital conversion apparatus including a circuit to substitute calculated values when the dynamic range of the converter is exceeded | |
EP0100967A1 (en) | Digital television receiver | |
EP0893031B1 (en) | Method and apparatus for decoding composite video signals | |
EP0735779B1 (en) | Color signal demodulator suitable for PAL and SECAM TV receiver | |
CA1300741C (en) | Signal separator having function of subsampling digital composite video signal | |
JP2536675B2 (ja) | 輝度信号色信号分離フィルタ | |
JP3110945B2 (ja) | ディジタル復調装置 | |
CA1268540A (en) | Digital television receiver with digital video processing circuit | |
JPH0638669B2 (ja) | 動き検出回路 | |
JP2599448B2 (ja) | Muse受像機のクランプレベル検出回路 | |
JP2589003B2 (ja) | 輝度信号色信号分離フィルタ | |
JPS62268288A (ja) | デイジタルacc回路 | |
JPH02250490A (ja) | 色信号動き検出回路 | |
JPH11308632A (ja) | 色復調回路 | |
JPS60237785A (ja) | Pal方式輝度信号・色信号分離フイルタ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19920225 |
|
PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 19920225 Comment text: Request for Examination of Application |
|
PG1501 | Laying open of application | ||
E902 | Notification of reason for refusal | ||
PE0902 | Notice of grounds for rejection |
Comment text: Notification of reason for refusal Patent event date: 19950517 Patent event code: PE09021S01D |
|
G160 | Decision to publish patent application | ||
PG1605 | Publication of application before grant of patent |
Comment text: Decision on Publication of Application Patent event code: PG16051S01I Patent event date: 19960223 |
|
E701 | Decision to grant or registration of patent right | ||
PE0701 | Decision of registration |
Patent event code: PE07011S01D Comment text: Decision to Grant Registration Patent event date: 19960531 |
|
GRNT | Written decision to grant | ||
PR0701 | Registration of establishment |
Comment text: Registration of Establishment Patent event date: 19960722 Patent event code: PR07011E01D |
|
PR1002 | Payment of registration fee |
Payment date: 19960722 End annual number: 3 Start annual number: 1 |
|
FPAY | Annual fee payment |
Payment date: 19990309 Year of fee payment: 4 |
|
PR1001 | Payment of annual fee |
Payment date: 19990309 Start annual number: 4 End annual number: 4 |
|
LAPS | Lapse due to unpaid annual fee | ||
PC1903 | Unpaid annual fee |