CA2267679A1 - Detecteurs d'interference ntsc dans un meme canal reagissant a des signaux recus du canal q dans des recepteurs de signaux de tv numerique - Google Patents
Detecteurs d'interference ntsc dans un meme canal reagissant a des signaux recus du canal q dans des recepteurs de signaux de tv numeriqueInfo
- Publication number
- CA2267679A1 CA2267679A1 CA002267679A CA2267679A CA2267679A1 CA 2267679 A1 CA2267679 A1 CA 2267679A1 CA 002267679 A CA002267679 A CA 002267679A CA 2267679 A CA2267679 A CA 2267679A CA 2267679 A1 CA2267679 A1 CA 2267679A1
- Authority
- CA
- Canada
- Prior art keywords
- received
- channel
- ntsc
- signal
- channel signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/04—Systems for the transmission of one television signal, i.e. both picture and sound, by a single carrier
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
-
- 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
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
-
- 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
- H04N5/455—Demodulation-circuits
-
- 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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- 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
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
- H04N5/211—Ghost signal cancellation
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Artificial Intelligence (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Noise Elimination (AREA)
Abstract
La présente invention concerne un détecteur d'interférence NTSC (44) dans un même canal détectant la présence d'un signal d'interférence NSTC dans le signal reçu du canal Q orthogonal au signal reçu du canal I, au lieu de détecter la présence d'un signal interférant NTSC dans le signal reçu du canal I. En déterminant si une quantité significative ou non d'interférence NTSC dans le même canal accompagne le signal reçu du canal Q, on détermine, de manière inférante, si une quantité significative ou non d'interférences NTSC dans le même canal accompagne également le signal reçu du canal I de façon à faire corriger de trop nombreuses erreurs dans le décodage en treillis d'un signal reçu égalisé du canal I par le détecteur Reed-Solomon (40) en suivant le décodeur en treillis (34). La détermination exacte des niveaux d'interférence dans un même canal est simplifiée, essentiellement, parce qu'aucune polarisation distincte ne survient pendant la détection synchrone de phase en quadrature de porteuse pilote d'un signal de télévision numérique VSB AM.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US72479996A | 1996-10-02 | 1996-10-02 | |
US08/724,799 | 1996-10-02 | ||
PCT/US1997/016931 WO1998015120A1 (fr) | 1996-10-02 | 1997-10-02 | Detecteurs d'interference ntsc dans un meme canal reagissant a des signaux recus du canal q dans des recepteurs de signaux de tv numerique |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2267679A1 true CA2267679A1 (fr) | 1998-04-09 |
CA2267679C CA2267679C (fr) | 2005-02-08 |
Family
ID=24911961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002267679A Expired - Fee Related CA2267679C (fr) | 1996-10-02 | 1997-10-02 | Detecteurs d'interference ntsc dans un meme canal reagissant a des signaux recus du canal q dans des recepteurs de signaux de tv numerique |
Country Status (4)
Country | Link |
---|---|
KR (1) | KR20000048803A (fr) |
CN (1) | CN1115875C (fr) |
CA (1) | CA2267679C (fr) |
WO (1) | WO1998015120A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100893421B1 (ko) * | 2001-04-16 | 2009-04-17 | 톰슨 라이센싱 | 고선명 텔레비전 수신기용 복조기 |
US20090185648A1 (en) * | 2008-01-22 | 2009-07-23 | Guo-Hau Gau | Methods and devices for processing signals transmitted via communication system |
CN112399097B (zh) * | 2019-08-13 | 2024-01-19 | 深圳Tcl数字技术有限公司 | 一种信号干扰处理方法、数字电视及存储介质 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5479449A (en) * | 1994-05-04 | 1995-12-26 | Samsung Electronics Co. Ltd. | Digital VSB detector with bandpass phase tracker, as for inclusion in an HDTV receiver. |
US5546132A (en) * | 1994-12-07 | 1996-08-13 | Goldstar Co., Ltd. | NTSC interference detector |
-
1997
- 1997-10-02 KR KR1019990702795A patent/KR20000048803A/ko not_active Application Discontinuation
- 1997-10-02 CA CA002267679A patent/CA2267679C/fr not_active Expired - Fee Related
- 1997-10-02 WO PCT/US1997/016931 patent/WO1998015120A1/fr not_active Application Discontinuation
- 1997-10-02 CN CN97198489A patent/CN1115875C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
KR20000048803A (ko) | 2000-07-25 |
CN1115875C (zh) | 2003-07-23 |
WO1998015120A1 (fr) | 1998-04-09 |
CA2267679C (fr) | 2005-02-08 |
CN1232591A (zh) | 1999-10-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20171002 |
|
MKLA | Lapsed |
Effective date: 20171002 |