GB2326070B - Demoulding digital video broadcast siginals - Google Patents

Demoulding digital video broadcast siginals

Info

Publication number
GB2326070B
GB2326070B GB9809587A GB9809587A GB2326070B GB 2326070 B GB2326070 B GB 2326070B GB 9809587 A GB9809587 A GB 9809587A GB 9809587 A GB9809587 A GB 9809587A GB 2326070 B GB2326070 B GB 2326070B
Authority
GB
United Kingdom
Prior art keywords
siginals
demoulding
digital video
video broadcast
broadcast
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
GB9809587A
Other versions
GB2326070A (en
GB9809587D0 (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 GBGB9727112.6A external-priority patent/GB9727112D0/en
Application filed by British Broadcasting Corp, LSI Logic Corp filed Critical British Broadcasting Corp
Priority to GB9809587A priority Critical patent/GB2326070B/en
Publication of GB9809587D0 publication Critical patent/GB9809587D0/en
Publication of GB2326070A publication Critical patent/GB2326070A/en
Application granted granted Critical
Publication of GB2326070B publication Critical patent/GB2326070B/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
    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Circuits Of Receivers In General (AREA)
GB9809587A 1997-05-02 1998-05-05 Demoulding digital video broadcast siginals Expired - Fee Related GB2326070B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9809587A GB2326070B (en) 1997-05-02 1998-05-05 Demoulding digital video broadcast siginals

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
GBGB9727112.6A GB9727112D0 (en) 1997-12-22 1997-12-22 Demodulating digital video broadcast signals
GB9809587A GB2326070B (en) 1997-05-02 1998-05-05 Demoulding digital video broadcast siginals

Publications (3)

Publication Number Publication Date
GB9809587D0 GB9809587D0 (en) 1998-07-01
GB2326070A GB2326070A (en) 1998-12-09
GB2326070B true GB2326070B (en) 2002-04-24

Family

ID=27451638

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9809587A Expired - Fee Related GB2326070B (en) 1997-05-02 1998-05-05 Demoulding digital video broadcast siginals

Country Status (1)

Country Link
GB (1) GB2326070B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19920999B4 (en) * 1998-05-09 2005-06-30 Lg Electronics Inc. Method and device for receiving a digital video signal
GB2340000B (en) * 1998-07-02 2003-06-18 Lsi Logic Corp Storing digital video braodcast signals
GB9901491D0 (en) 1999-01-22 1999-03-17 Univ Bristol Receiver
JP3304914B2 (en) * 1999-03-31 2002-07-22 日本電気株式会社 Frequency correction method
JP3110423B1 (en) * 1999-05-21 2000-11-20 株式会社東芝 Error correction device for frequency selective interference
SE521513C2 (en) * 1999-06-04 2003-11-11 Ericsson Telefon Ab L M Method and apparatus in a multi-transmission system
JP3492565B2 (en) * 1999-09-13 2004-02-03 松下電器産業株式会社 OFDM communication device and detection method
US7106810B2 (en) 1999-10-07 2006-09-12 Matthew James Collins Method and apparatus for a demodulator circuit
US6704372B2 (en) * 2001-09-18 2004-03-09 Broadlogic Network Technologies Inc. Digital implementation of multi-channel demodulators
JP4359176B2 (en) * 2003-07-30 2009-11-04 パナソニック株式会社 Frame synchronization detection circuit, frame synchronization detection method, control information detection circuit, control information decoding method, and receiving apparatus
SG133423A1 (en) 2005-12-14 2007-07-30 Oki Techno Ct Singapore Pte A method, apraratus and receiver for demapping dual carrier modulated cofdm signals

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0700189A1 (en) * 1994-08-03 1996-03-06 NOKIA TECHNOLOGY GmbH Method and channel equalizer for the channel equalization of digital signals in the frequency domain
GB2304504A (en) * 1995-08-19 1997-03-19 Northern Telecom Ltd OFDM receiver includes digital filter
EP0786888A2 (en) * 1996-01-29 1997-07-30 Samsung Electronics Co., Ltd. Provision of a frequency reference in a multicarrier modulation system
EP0795985A2 (en) * 1996-03-13 1997-09-17 NOKIA TECHNOLOGY GmbH Compensation of phase errors in multicarrier signals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0700189A1 (en) * 1994-08-03 1996-03-06 NOKIA TECHNOLOGY GmbH Method and channel equalizer for the channel equalization of digital signals in the frequency domain
GB2304504A (en) * 1995-08-19 1997-03-19 Northern Telecom Ltd OFDM receiver includes digital filter
EP0786888A2 (en) * 1996-01-29 1997-07-30 Samsung Electronics Co., Ltd. Provision of a frequency reference in a multicarrier modulation system
EP0795985A2 (en) * 1996-03-13 1997-09-17 NOKIA TECHNOLOGY GmbH Compensation of phase errors in multicarrier signals

Also Published As

Publication number Publication date
GB2326070A (en) 1998-12-09
GB9809587D0 (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