BR9803857A - Signal receiver. - Google Patents
Signal receiver.Info
- Publication number
- BR9803857A BR9803857A BR9803857-5A BR9803857A BR9803857A BR 9803857 A BR9803857 A BR 9803857A BR 9803857 A BR9803857 A BR 9803857A BR 9803857 A BR9803857 A BR 9803857A
- Authority
- BR
- Brazil
- Prior art keywords
- signals
- signal
- qam
- vsb
- symbol
- Prior art date
Links
- 230000001105 regulatory effect Effects 0.000 abstract 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
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
- H03M13/373—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35 with erasure correction and erasure determination, e.g. for packet loss recovery or setting of erasures for the decoding of Reed-Solomon codes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/65—Purpose and implementation aspects
- H03M13/6502—Reduction of hardware complexity or efficient processing
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Probability & Statistics with Applications (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
"RECEPTOR DE SINAL". Um rádio receptor usa o mesmo sintonizador para receber um sinal de televisão digital (DTV) selecionado, independente de ser um sinal de modulação em amplitude de quadratura (QAM) ou um sinal de banda lateral residual (VSB). O sinal IF final é digitalizado a uma taxa que é um múltiplo de ambas as freq³ências de símbolo dos sinais QAM e VSB, para sincrodinar à banda básica. As freq³ências de portadora dos sinais IF finais QAM e VSB são reguladas para serem sub múltiplos do múltiplo de ambas as freq³ências de símbolo dos sinais QAM e VSB, aplicando sinais de controle automático de freq³ência e fase (AFPC) desenvolvidos no circuito digital para um oscilador local do sintonizador. Sinais DTV de banda básica obtidos por sincrodismo dos sinais IF finais possuem uma taxa de símbolo mais alta que a taxa de símbolo, para facilitar a sincronizacão de símbolo. Os sinais DTV de banda básica são decimados para a taxa de símbolo, antes de realizar a equalização de canal para reduzir o número de multiplicadores requerido no filtro de equalização de canal."SIGNAL RECEIVER". A radio receiver uses the same tuner to receive a selected digital television signal (DTV), regardless of whether it is a quadrature amplitude modulation (QAM) signal or a residual sideband signal (VSB). The final IF signal is digitized at a rate that is a multiple of both the symbol frequencies of the QAM and VSB signals, to sync to the basic band. The carrier frequencies of the final IF signals QAM and VSB are regulated to be sub multiples of the multiple of both the symbol frequencies of the QAM and VSB signals, by applying automatic frequency and phase control (AFPC) signals developed in the digital circuit to an oscillator. tuner location. Basic band DTV signals obtained by synchrony of the final IF signals have a higher symbol rate than the symbol rate, to facilitate symbol synchronization. The baseband DTV signals are decimated to the symbol rate, before performing channel equalization to reduce the number of multipliers required in the channel equalization filter.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/021,946 US5966188A (en) | 1996-12-26 | 1998-02-11 | Decimation of baseband DTV signals prior to channel equalization in digital television signal receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR9803857A true BR9803857A (en) | 1999-12-14 |
Family
ID=21807004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR9803857-5A BR9803857A (en) | 1998-02-11 | 1998-09-30 | Signal receiver. |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPH11284932A (en) |
| KR (1) | KR100276772B1 (en) |
| CN (1) | CN1226117A (en) |
| AR (1) | AR017522A1 (en) |
| AU (1) | AU720014B2 (en) |
| BR (1) | BR9803857A (en) |
| CA (1) | CA2249035A1 (en) |
| SG (1) | SG85096A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06508805A (en) * | 1991-08-05 | 1994-10-06 | ザ、ブロクター、エンド、ギャンブル、カンパニー | plug-in handle |
| KR100353861B1 (en) * | 1999-11-11 | 2002-09-26 | 한국전자통신연구원 | DTV Tuner Apparatus And Method For Broadband Auto Frequency Channel Selection Using Approximated Frequency Mapping Function |
| DE602004029551D1 (en) * | 2003-01-28 | 2010-11-25 | Thomson Licensing | STAGGERCASTING IN ROBUST MODE |
| US7502411B2 (en) * | 2004-03-05 | 2009-03-10 | Silicon Image, Inc. | Method and circuit for adaptive equalization of multiple signals in response to a control signal generated from one of the equalized signals |
| DE102004054893A1 (en) * | 2004-11-12 | 2006-05-24 | Micronas Gmbh | Method and circuit arrangement for channel filtering analog or digitally modulated TV signals |
| JP4674103B2 (en) * | 2005-03-15 | 2011-04-20 | 富士通セミコンダクター株式会社 | Reception apparatus and received signal processing method |
| CN104284058A (en) * | 2013-07-09 | 2015-01-14 | 晨星半导体股份有限公司 | Filtering system and method and television signal receiving device and method |
| US11885874B2 (en) * | 2018-12-19 | 2024-01-30 | Semiconductor Components Industries, Llc | Acoustic distance measuring circuit and method for low frequency modulated (LFM) chirp signals |
| KR20210034997A (en) * | 2019-09-23 | 2021-03-31 | 에스케이하이닉스 주식회사 | Semiconductor device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5648987A (en) * | 1994-03-24 | 1997-07-15 | Samsung Electronics Co., Ltd. | Rapid-update adaptive channel-equalization filtering for digital radio receivers, such as HDTV receivers |
| US5715012A (en) * | 1996-03-13 | 1998-02-03 | Samsung Electronics Co., Ltd. | Radio receivers for receiving both VSB and QAM digital HDTV signals |
| KR960020485A (en) * | 1994-11-14 | 1996-06-17 | 이헌조 | HTV receiver |
| US5852477A (en) * | 1997-06-25 | 1998-12-22 | Samsung Electronics Co., Ltd. | Digital TV receivers with poly-phase analog-to-digital conversion of baseband symbol coding |
-
1998
- 1998-09-04 SG SG9803424A patent/SG85096A1/en unknown
- 1998-09-26 KR KR1019980040162A patent/KR100276772B1/en not_active IP Right Cessation
- 1998-09-29 CN CN98120772A patent/CN1226117A/en active Pending
- 1998-09-29 CA CA002249035A patent/CA2249035A1/en not_active Abandoned
- 1998-09-30 JP JP10278812A patent/JPH11284932A/en active Pending
- 1998-09-30 BR BR9803857-5A patent/BR9803857A/en not_active IP Right Cessation
- 1998-09-30 AU AU87121/98A patent/AU720014B2/en not_active Ceased
- 1998-10-27 AR ARP980105362A patent/AR017522A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SG85096A1 (en) | 2001-12-19 |
| KR100276772B1 (en) | 2001-01-15 |
| CA2249035A1 (en) | 1999-08-11 |
| AU8712198A (en) | 1999-08-26 |
| CN1226117A (en) | 1999-08-18 |
| JPH11284932A (en) | 1999-10-15 |
| AU720014B2 (en) | 2000-05-18 |
| KR19990071401A (en) | 1999-09-27 |
| AR017522A1 (en) | 2001-09-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B08F | Application fees: dismissal - article 86 of industrial property law |
Free format text: REFERENTE A 5A,6A,7A E 8A ANUIDADES. |
|
| B08K | Lapse as no evidence of payment of the annual fee has been furnished to inpi (acc. art. 87) |
Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1860 DE 29/08/2006. |