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GB2326069B - Demodulating digital video broadcast signals - Google Patents

Demodulating digital video broadcast signals

Info

Publication number
GB2326069B
GB2326069B GB9809585A GB9809585A GB2326069B GB 2326069 B GB2326069 B GB 2326069B GB 9809585 A GB9809585 A GB 9809585A GB 9809585 A GB9809585 A GB 9809585A GB 2326069 B GB2326069 B GB 2326069B
Authority
GB
United Kingdom
Prior art keywords
digital video
broadcast signals
video broadcast
demodulating digital
demodulating
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.)
Expired - Fee Related
Application number
GB9809585A
Other versions
GB2326069A (en
GB9809585D0 (en
Inventor
Oliver Paul Haffenden
Christopher Keith Perry Clarke
Justin David Mitchell
Philippe Sadot
Jonathan Highton Stott
Adrian Paul Robinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Broadcasting Corp
LSI Corp
Original Assignee
British Broadcasting Corp
LSI Logic Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GBGB9709063.3A external-priority patent/GB9709063D0/en
Priority claimed from GBGB9727113.4A external-priority patent/GB9727113D0/en
Application filed by British Broadcasting Corp, LSI Logic Corp filed Critical British Broadcasting Corp
Priority to GB9809585A priority Critical patent/GB2326069B/en
Publication of GB9809585D0 publication Critical patent/GB9809585D0/en
Publication of GB2326069A publication Critical patent/GB2326069A/en
Application granted granted Critical
Publication of GB2326069B publication Critical patent/GB2326069B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04L1/0071—Use of interleaving
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03025—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception using a two-tap delay line
    • 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
    • H04L27/2659—Coarse or integer frequency offset determination and 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
    • H04L27/2657—Carrier synchronisation
    • H04L27/266—Fine or fractional frequency offset determination and 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
    • 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
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2675—Pilot or known symbols
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • 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
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/0028—Correction of carrier offset at passband only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0083—Signalling arrangements
    • H04L2027/0087—Out-of-band signals, (e.g. pilots)
    • 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
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB9809585A 1997-05-02 1998-05-05 Demodulating digital video broadcast signals Expired - Fee Related GB2326069B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9809585A GB2326069B (en) 1997-05-02 1998-05-05 Demodulating digital video broadcast signals

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB9709063.3A GB9709063D0 (en) 1997-05-02 1997-05-02 Improvements to OFDM symbol synchronization
US5419597P 1997-07-30 1997-07-30
GBGB9727113.4A GB9727113D0 (en) 1997-12-22 1997-12-22 Demodulating digital video broadcast signals
GB9809585A GB2326069B (en) 1997-05-02 1998-05-05 Demodulating digital video broadcast signals

Publications (3)

Publication Number Publication Date
GB9809585D0 GB9809585D0 (en) 1998-07-01
GB2326069A GB2326069A (en) 1998-12-09
GB2326069B true GB2326069B (en) 2002-06-19

Family

ID=27451639

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9809585A Expired - Fee Related GB2326069B (en) 1997-05-02 1998-05-05 Demodulating digital video broadcast signals

Country Status (1)

Country Link
GB (1) GB2326069B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3304914B2 (en) * 1999-03-31 2002-07-22 日本電気株式会社 Frequency correction method
US7349667B2 (en) * 2001-10-19 2008-03-25 Texas Instruments Incorporated Simplified noise estimation and/or beamforming for wireless communications
US20060159194A1 (en) * 2005-01-20 2006-07-20 Texas Instruments Incorporated Scalable pre-channel estimate phase corrector, method of correction and MIMO communication system employing the corrector and method
US8208522B2 (en) * 2008-03-07 2012-06-26 Nokia Corporation System and methods for receiving OFDM symbols having timing and frequency offsets

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995019671A1 (en) * 1994-01-18 1995-07-20 Telia Ab Method and arrangement for synchronization in ofdm modulation
EP0683576A1 (en) * 1994-05-20 1995-11-22 Hitachi, Ltd. An OFDM digital broadcasting system, and a transmission system and a receiving system used for digital broadcasting
EP0762702A1 (en) * 1995-08-21 1997-03-12 France Telecom Method and apparatus for demodulating a multicarrier signal, taking a channel response estimate and an estimate of white frequency distortion into account
EP0762703A1 (en) * 1995-08-21 1997-03-12 France Telecom Multicarrier demodulation with reduction of white frequency distortion
GB2320871A (en) * 1996-12-28 1998-07-01 Daewoo Electronics Co Ltd Frame synchronization in digital communication systems utilizing OFDM

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995019671A1 (en) * 1994-01-18 1995-07-20 Telia Ab Method and arrangement for synchronization in ofdm modulation
EP0683576A1 (en) * 1994-05-20 1995-11-22 Hitachi, Ltd. An OFDM digital broadcasting system, and a transmission system and a receiving system used for digital broadcasting
EP0762702A1 (en) * 1995-08-21 1997-03-12 France Telecom Method and apparatus for demodulating a multicarrier signal, taking a channel response estimate and an estimate of white frequency distortion into account
EP0762703A1 (en) * 1995-08-21 1997-03-12 France Telecom Multicarrier demodulation with reduction of white frequency distortion
GB2320871A (en) * 1996-12-28 1998-07-01 Daewoo Electronics Co Ltd Frame synchronization in digital communication systems utilizing OFDM

Also Published As

Publication number Publication date
GB2326069A (en) 1998-12-09
GB9809585D0 (en) 1998-07-01

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20160505