GB2340353B - Method and device for demapping digital video - Google Patents

Method and device for demapping digital video

Info

Publication number
GB2340353B
GB2340353B GB9910848A GB9910848A GB2340353B GB 2340353 B GB2340353 B GB 2340353B GB 9910848 A GB9910848 A GB 9910848A GB 9910848 A GB9910848 A GB 9910848A GB 2340353 B GB2340353 B GB 2340353B
Authority
GB
United Kingdom
Prior art keywords
demapping
digital video
video
digital
demapping digital
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
GB9910848A
Other versions
GB9910848D0 (en
GB2340353A (en
Inventor
Weon Cheol Lee
Jeong Ho Kwak
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 KR1019980016633A external-priority patent/KR100556448B1/en
Priority claimed from KR1019980036581A external-priority patent/KR100546566B1/en
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of GB9910848D0 publication Critical patent/GB9910848D0/en
Publication of GB2340353A publication Critical patent/GB2340353A/en
Application granted granted Critical
Publication of GB2340353B publication Critical patent/GB2340353B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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]
    • H04N21/20—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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • H04L27/066—Carrier recovery circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • H04N19/89—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB9910848A 1998-05-09 1999-05-10 Method and device for demapping digital video Expired - Fee Related GB2340353B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019980016633A KR100556448B1 (en) 1998-05-09 1998-05-09 Method and apparatus for demapping
KR1019980036581A KR100546566B1 (en) 1998-09-04 1998-09-04 Apparatus for csi generate of ofdm

Publications (3)

Publication Number Publication Date
GB9910848D0 GB9910848D0 (en) 1999-07-07
GB2340353A GB2340353A (en) 2000-02-16
GB2340353B true GB2340353B (en) 2000-07-05

Family

ID=26633638

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9910848A Expired - Fee Related GB2340353B (en) 1998-05-09 1999-05-10 Method and device for demapping digital video

Country Status (2)

Country Link
DE (1) DE19920999B4 (en)
GB (1) GB2340353B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100556467B1 (en) * 1998-12-26 2006-05-25 엘지전자 주식회사 Method and apparatus for demapping
GB2355164B (en) * 1999-10-07 2004-06-09 Oak Technology Inc Demodulator circuit
US7106810B2 (en) 1999-10-07 2006-09-12 Matthew James Collins Method and apparatus for a demodulator circuit
DE19948383A1 (en) * 1999-10-07 2001-04-12 Rohde & Schwarz Method for determining the user data constellation at the receiving end of a multicarrier signal modulated according to the DVB-T standard for calculating the residual carrier power or improving the demodulation
DE10005287A1 (en) * 2000-02-07 2001-08-09 Rohde & Schwarz Method for determining the residual carrier power in a multi-carrier signal QAM-modulated in 8K mode according to the DVB-T standard
EP1348286B1 (en) * 2000-12-28 2006-07-19 Conexant Systems, Inc. Multi-carrier demodulator
US7564912B2 (en) 2006-02-15 2009-07-21 Mediatek Inc. Method and apparatus for channel state information generation in a DVB-T receiver
KR100888503B1 (en) 2006-12-01 2009-03-12 한국전자통신연구원 Method and apparatus for derate matching in communication system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501448A2 (en) * 1991-02-27 1992-09-02 Nec Corporation Gain control circuitry for QAM demodulator
US5640417A (en) * 1991-10-04 1997-06-17 Harris Canada, Inc. QAM detector which compensates for received symbol distortion induced by a cellular base station
GB2326070A (en) * 1997-05-02 1998-12-09 Lsi Logic Corp Demodulating digital video broadcast siginals

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501448A2 (en) * 1991-02-27 1992-09-02 Nec Corporation Gain control circuitry for QAM demodulator
US5640417A (en) * 1991-10-04 1997-06-17 Harris Canada, Inc. QAM detector which compensates for received symbol distortion induced by a cellular base station
GB2326070A (en) * 1997-05-02 1998-12-09 Lsi Logic Corp Demodulating digital video broadcast siginals

Also Published As

Publication number Publication date
GB9910848D0 (en) 1999-07-07
DE19920999A1 (en) 2000-01-13
DE19920999B4 (en) 2005-06-30
GB2340353A (en) 2000-02-16

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Legal Events

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

Effective date: 20160510