KR100640935B1 - 디지털 tv 수신기 및 자기 진단 방법 - Google Patents
디지털 tv 수신기 및 자기 진단 방법 Download PDFInfo
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- KR100640935B1 KR100640935B1 KR1020030064031A KR20030064031A KR100640935B1 KR 100640935 B1 KR100640935 B1 KR 100640935B1 KR 1020030064031 A KR1020030064031 A KR 1020030064031A KR 20030064031 A KR20030064031 A KR 20030064031A KR 100640935 B1 KR100640935 B1 KR 100640935B1
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- Prior art keywords
- lock
- signal
- recovery unit
- receiver
- carrier
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- 238000000034 method Methods 0.000 title claims description 34
- 238000004092 self-diagnosis Methods 0.000 title claims description 8
- 238000011084 recovery Methods 0.000 claims abstract description 114
- 238000012545 processing Methods 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 238000012937 correction Methods 0.000 claims description 4
- 238000002405 diagnostic procedure Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 11
- 238000010897 surface acoustic wave method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000012356 Product development Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/015—High-definition television systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2662—Symbol synchronisation
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Circuits Of Receivers In General (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Description
이하에서 수신기 복구 블록은 방송 신호를 표출하기 위해 외부로부터 수신하거나 다른 복구 블록이 출력한 신호에 대해 소정의 신호처리를 수행하거나, 방송 신호를 처리하기 위해 소정의 신호를 발생시키는 디지털 TV 수신기 내의 모든 신호처리 블록을 의미한다.
본 발명의 다른 목적, 특징 및 이점들은 첨부한 도면을 참조한 실시예들의 상세한 설명을 통해 명백해 질 것이다.
Claims (6)
- 수신된 신호의 심볼 위치에서 신호대 잡음비가 최대가 되도록 필터링한 신호의 심볼 동기 신호를 보정하는 심볼 동기 복구부;상기 심볼 동기 복구부가 정상적으로 신호 처리한 경우 락 신호를 출력하는 심볼 동기 락 검출기;상기 심볼 동기가 복구된 신호의 채널 정보로부터 반송파를 복구하는 반송파복구부;상기 반송파 복구부가 정상적으로 신호 처리한 경우 락 신호를 출력하는 반송파 락 검출기;상기 반송파 복구된 신호를 복호화하는 채널복호화부; 및상기 심볼 동기 락 검출기의 락 신호를 저장하여 상기 반송파 복구부를 구동시키고, 상기 반송파 검출기의 락 신호를 저장하여 상기 채널복호화부를 구동시키는 락 처리부를 포함하는 것을 특징으로 하는 디지털 TV 수신기.
- 이득 복구부, 정합필터, 심볼 동기 복구부, 채널 등화기, 반송파 복구부, 채널 복호화부를 포함하는 복구 블록들과,상기 이득 복구부로부터 입력 신호의 레벨 정보를 받아 입력 신호가 존재하는가를 판단하여 NO SIGNAL을 출력하는 입력 신호 검출기와,상기 이득 복구부가 이득 복구를 완료하면 AGC LOCK을 출력하는 AGC 락 검출기와,상기 심볼 동기 복구부에서 심볼 동기 복구가 완료되면 TR LOCK을 출력하는 심볼 동기 락 검출기와,상기 반송파 복구부를 통해 수신되는 신호의 SNR이 시스템에서 요구하는 SNR을 만족하게 되면 SNR LOCK을 출력하는 SNR 계산기와,상기 반송파 복구부에서 반송파 복구가 완료되면 CR LOCK을 출력하는 반송파 락 검출기와,상기 채널 복호화부에서 오류 정정이 완료되면 FEC LOCK을 출력하는 FEC 락 검출기와,상기 락 신호들(NO SIGNAL, AGC LOCK, TR LOCK, SNR LOCK, CR LOCK, FEC LOCK)을 수신하여 상기 복구 블록들이 순차적으로 구동되도록 제어하는 수신기 락 처리부로 구성됨을 특징으로 하는 디지털 TV 수신기.
- 제 2항에 있어서,상기 수신기 락 처리부에 수신되는 락 신호들의 검출 시점을 저장하는 락 정보 저장부를 더 포함하여 구성됨을 특징으로 하는 디지털 TV 수신기.
- 제 3항에 있어서,상기 락 정보 저장부는시스템이 인에이블된 시점에서부터 시간을 카운트하는 타이머와,각 락 신호별로 할당된 저장공간을 갖는 메모리와,상기 수신기 락 처리부로부터 수신되는 락 신호들과 상기 타이머의 시간 정보를 입력받아서 각각의 락 신호의 최종 락 시간을 상기 메모리에 저장하는 저장 제어기로 구성됨을 특징으로 하는 디지털 TV 수신기.
- 제 2항에 있어서,상기 수신기 락 처리부는상기 NO SIGNAL 신호가 수신되면 심볼 동기 복구부가 구동되도록 제어하고, 상기 AGC LOCK 또는 TR LOCK 신호가 수신되면 채널 등화기와 반송파 복구부가 구동되도록 제어하고, 상기 SNR LOCK 신호와 CR LOCK 신호가 수신되면 채널 복호화부가 구동되도록 제어하도록 구성된 것을 특징으로 하는 디지털 TV 수신기.
- 디지털 방송을 위해 순차적으로 연결되고 각각 신호 처리를 수행하는 심볼 동기 복구부, 반송파복구부 및 채널복호화부를 포함하는 디지털 TV 수신기의 자기 진단 방법에 있어서,상기 심볼 동기 복구부가 정상적으로 신호 처리했음을 알리는 락 신호를 검출하여 저장하는 단계;상기 반송파 복구부를 구동시키는 단계;상기 반송파 복구부가 정상적으로 신호 처리했음을 알리는 락 신호를 검출하여 저장하는 단계; 및상기 채널복호화부를 구동시키는 단계를 포함하는 것을 특징으로 하는 디지털 TV 수신기의 자기 진단 방법.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020030064031A KR100640935B1 (ko) | 2003-09-16 | 2003-09-16 | 디지털 tv 수신기 및 자기 진단 방법 |
US10/940,799 US7515653B2 (en) | 2003-09-16 | 2004-09-15 | Digital broadcasting receiver, driving method thereof, and self-diagnosis method thereof |
Applications Claiming Priority (1)
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KR1020030064031A KR100640935B1 (ko) | 2003-09-16 | 2003-09-16 | 디지털 tv 수신기 및 자기 진단 방법 |
Publications (2)
Publication Number | Publication Date |
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KR20050027672A KR20050027672A (ko) | 2005-03-21 |
KR100640935B1 true KR100640935B1 (ko) | 2006-11-02 |
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KR1020030064031A KR100640935B1 (ko) | 2003-09-16 | 2003-09-16 | 디지털 tv 수신기 및 자기 진단 방법 |
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US (1) | US7515653B2 (ko) |
KR (1) | KR100640935B1 (ko) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7991086B2 (en) * | 2004-07-15 | 2011-08-02 | Thomson Licensing | System and method for improved carrier recovery |
WO2007091779A1 (en) | 2006-02-10 | 2007-08-16 | Lg Electronics Inc. | Digital broadcasting receiver and method of processing data |
WO2007126196A1 (en) | 2006-04-29 | 2007-11-08 | Lg Electronics Inc. | Digital broadcasting system and method of processing data |
WO2007136166A1 (en) | 2006-05-23 | 2007-11-29 | Lg Electronics Inc. | Digital broadcasting system and method of processing data |
US7873104B2 (en) | 2006-10-12 | 2011-01-18 | Lg Electronics Inc. | Digital television transmitting system and receiving system and method of processing broadcasting data |
KR101253185B1 (ko) | 2007-03-26 | 2013-04-10 | 엘지전자 주식회사 | 디지털 방송 시스템 및 데이터 처리 방법 |
KR101285887B1 (ko) | 2007-03-26 | 2013-07-11 | 엘지전자 주식회사 | 디지털 방송 시스템 및 데이터 처리 방법 |
KR101285888B1 (ko) | 2007-03-30 | 2013-07-11 | 엘지전자 주식회사 | 디지털 방송 시스템 및 데이터 처리 방법 |
WO2009005326A2 (en) | 2007-07-04 | 2009-01-08 | Lg Electronics Inc. | Digital broadcasting system and method of processing data |
US8433973B2 (en) * | 2007-07-04 | 2013-04-30 | Lg Electronics Inc. | Digital broadcasting system and method of processing data |
KR20090012180A (ko) | 2007-07-28 | 2009-02-02 | 엘지전자 주식회사 | 디지털 방송 시스템 및 데이터 처리 방법 |
WO2009028857A2 (en) | 2007-08-24 | 2009-03-05 | Lg Electronics Inc. | Digital broadcasting system and method of processing data in digital broadcasting system |
JP2011035557A (ja) * | 2009-07-30 | 2011-02-17 | Panasonic Corp | シンボルレート検出器及び受信装置 |
US8903028B2 (en) * | 2012-09-20 | 2014-12-02 | Novelsat Ltd. | Timing recovery for low roll-off factor signals |
JP6390244B2 (ja) * | 2014-07-31 | 2018-09-19 | 株式会社デンソー | 波形等化装置 |
EP3324593A4 (en) * | 2015-07-16 | 2019-03-20 | LG Electronics Inc. | BROADCAST SIGNAL DEVICE, BROADCAST SIGNAL RECEIVER, BROADCAST SENDING METHOD AND BROADCAST SIGNAL RECEPTION PROCEDURE |
Family Cites Families (8)
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US6304621B1 (en) * | 1998-05-13 | 2001-10-16 | Broadcom Corporation | Multi-mode variable rate digital cable receiver |
US6690746B1 (en) * | 1999-06-11 | 2004-02-10 | Southwest Research Institute | Signal recognizer for communications signals |
EP1063826A1 (en) * | 1999-06-25 | 2000-12-27 | Sony International (Europe) GmbH | Carrier recovery means in digital quadrature receivers |
KR100314113B1 (ko) * | 1999-08-25 | 2001-11-15 | 구자홍 | 정합 필터 및 필터링방법, 이를 이용한 다매체 디지털 방송수신 장치 |
KR100351144B1 (ko) | 2000-01-07 | 2002-09-05 | 엘지전자 주식회사 | 디지털 티브이의 타이밍 복구장치 및 방법 |
KR100379394B1 (ko) | 2000-08-18 | 2003-04-10 | 엘지전자 주식회사 | 디지털 방송 수신기의 락 검출 장치 및 방법 |
US7050419B2 (en) * | 2001-02-23 | 2006-05-23 | Terayon Communicaion Systems, Inc. | Head end receiver for digital data delivery systems using mixed mode SCDMA and TDMA multiplexing |
US7180963B2 (en) * | 2002-11-25 | 2007-02-20 | Ali Corporation | Digital receiver capable of processing modulated signals at various data rates |
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2003
- 2003-09-16 KR KR1020030064031A patent/KR100640935B1/ko active IP Right Grant
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2004
- 2004-09-15 US US10/940,799 patent/US7515653B2/en not_active Expired - Fee Related
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US20050058192A1 (en) | 2005-03-17 |
US7515653B2 (en) | 2009-04-07 |
KR20050027672A (ko) | 2005-03-21 |
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