TW252250B - - Google Patents

Info

Publication number
TW252250B
TW252250B TW083108255A TW83108255A TW252250B TW 252250 B TW252250 B TW 252250B TW 083108255 A TW083108255 A TW 083108255A TW 83108255 A TW83108255 A TW 83108255A TW 252250 B TW252250 B TW 252250B
Authority
TW
Taiwan
Application number
TW083108255A
Original Assignee
Philips Electronics Nv
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
Application filed by Philips Electronics Nv filed Critical Philips Electronics Nv
Application granted granted Critical
Publication of TW252250B publication Critical patent/TW252250B/zh

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
    • H04L27/32—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
    • H04L27/36—Modulator circuits; Transmitter circuits
    • 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
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L23/00—Apparatus or local circuits for systems other than those covered by groups H04L15/00 - H04L21/00
    • H04L23/02—Apparatus or local circuits for systems other than those covered by groups H04L15/00 - H04L21/00 adapted for orthogonal signalling
    • 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
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Artificial Intelligence (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Television Systems (AREA)
TW083108255A 1993-08-31 1994-09-07 TW252250B (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11454593A 1993-08-31 1993-08-31

Publications (1)

Publication Number Publication Date
TW252250B true TW252250B (zh) 1995-07-21

Family

ID=22355913

Family Applications (1)

Application Number Title Priority Date Filing Date
TW083108255A TW252250B (zh) 1993-08-31 1994-09-07

Country Status (4)

Country Link
EP (1) EP0642245A1 (zh)
JP (1) JPH07177191A (zh)
KR (1) KR950007342A (zh)
TW (1) TW252250B (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980048220A (ko) * 1996-12-17 1998-09-15 구자홍 디지탈 직각 진폭 변조방식의 화상 복합장치
RU2160509C1 (ru) * 2000-02-04 2000-12-10 Виноградов Сергей Михайлович Способ и устройство синтеза, передачи, приема, анализа и оценки многовариантных по форме, многопозиционных и локальных по спектру сигналов

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1301864C (en) * 1987-02-19 1992-05-26 Sadao Takenaka Multilevel amplitude modulation and demodulation communication system
US5500875A (en) * 1990-12-12 1996-03-19 Signal Processing Associates Pty Limited QAM encoding
DE69232530T2 (de) * 1991-03-27 2002-11-07 Matsushita Electric Industrial Co., Ltd. Signalübertragungssystem
US5233629A (en) * 1991-07-26 1993-08-03 General Instrument Corporation Method and apparatus for communicating digital data using trellis coded qam

Also Published As

Publication number Publication date
JPH07177191A (ja) 1995-07-14
EP0642245A1 (en) 1995-03-08
KR950007342A (ko) 1995-03-21

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