HK42697A - Coding for digital transmission - Google Patents

Coding for digital transmission Download PDF

Info

Publication number
HK42697A
HK42697A HK42697A HK42697A HK42697A HK 42697 A HK42697 A HK 42697A HK 42697 A HK42697 A HK 42697A HK 42697 A HK42697 A HK 42697A HK 42697 A HK42697 A HK 42697A
Authority
HK
Hong Kong
Prior art keywords
signal
data
data elements
constellation
information
Prior art date
Application number
HK42697A
Other languages
German (de)
English (en)
Inventor
Bernard Lawrence Victor
Narayan Netravali Arun
Werner Jean-Jacques
Original Assignee
At&T 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
Application filed by At&T Corp. filed Critical At&T Corp.
Publication of HK42697A publication Critical patent/HK42697A/en

Links

Classifications

    • 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
    • H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
    • H04L27/3416—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes
    • H04L27/3427—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes in which the constellation is the n - fold Cartesian product of a single underlying two-dimensional constellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
    • 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
    • H04L27/3488—Multiresolution 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Error Detection And Correction (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Claims (10)

  1. Procédé de transmission d'informations de télévision, comportant les étapes de
    génération d'un signal numérique (104) représentant les informations de télévision, le signal numérique comportant au moins des premier et deuxième trains de données d'éléments de données,
    la mise en correspondance par voie (121) du signal numérique, et
    la transmission du signal mis en correspondance sur (141,151) une voie de transmission,
       CARACTERISE PAR
    l'étape de mise en correspondance étant telle que la probabilité d'erreur induite par la voie pour les éléments de données du premier train de données est inférieure à la probabilité d'erreur induite par la voie pour les éléments de données du deuxième train de données, l'étape de mise en correspondance comportant l'étape de
    sélection d'une séquence de points de signal à partir d'une constellation prédéfinie de points de signal pour représenter les éléments de données, la constellation étant telle que la distance minimum entre les points de signal représentant des valeurs différentes des éléments de données dudit premier train de données est supérieure à la distance minimum entre les points de signal représentant les valeurs différentes des éléments de données dudit deuxième train de données.
  2. Procédé selon la revendication 1, dans lequel ladite étape de mise en correspondance comporte l'étape de codage en treillis (215,216) du signal numérique.
  3. Procédé selon la revendication 1, dans lequel ladite constellation est une constellation de N dimensions, où N ≥ 2.
  4. Procédé selon la revendication 1, dans lequel ladite étape de génération comporte les étapes de
    réception des informations, et
    codage de source des informations en utilisant un code source prédéterminé.
  5. Procédé selon la revendication 4, dans lequel ladite étape de génération comporte l'étape de traitement des informations à source codée en utilisant au moins un premier algorithme de traitement prédéterminé, ledit traitement étant effectué pour les éléments de données dudit premier train de données indépendamment du traitement effectué pour les éléments de données dudit deuxième train de données.
  6. Dispositif destiné à être utilisé dans un système de transmission numérique du type dans lequel des points de signal provenant d'une constellation de points de signal prédéterminée représentant des mots de données associés respectifs sont communiqués à partir dudit émetteur sur une voie de transmission à un récepteur, lesdits mots de données étant composés d'éléments de données individuels, ladite constellation étant divisée en groupes de points de signal et chacun desdits groupes étant divisé en sous-groupes de points de signal, ledit dispositif comportant
    un moyen sensible (121) à au moins l'un des éléments de données de chaque mot de données pour identifier le groupe particulier desdits groupes qui comporte le point de signal associé audit mot de données et sensible à au moins un autre des éléments de données de ce mot pour identifier le sous-groupe particulier des sous-groupes à l'intérieur dudit groupe particulier qui comporte le point de signal associé audit mot de données, et
    un moyen de génération (141,151) d'un signal représentant un point de signal à partir du sous-groupe identifié et d'application de ce signal à ladite voie de communication,
       CARACTERISE EN CE QUE    lesdits groupes et sous-groupes sont disposés de telle sorte que la distance entre les points de signal de groupes différents est supérieure à la distance entre les points de signal du même groupe.
  7. Dispositif selon la revendication 6, dans lequel les éléments de données qui identifient ledit groupe particulier représentent des informations plus importantes que les éléments de données qui identifient ledit sous-groupe particulier.
  8. Dispositif selon la revendication 6, dans lequel lesdites informations sont des informations de signaux de télévision.
  9. Dispositif selon la revendication 6, dans lequel lesdits mots de données sont des mots de données codés par treillis.
  10. Dispositif selon la revendication 6, dans lequel ladite constellation est une constellation de N dimensions, où N ≥ 2.
HK42697A 1990-11-07 1997-04-03 Coding for digital transmission HK42697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/611,225 US5164963A (en) 1990-11-07 1990-11-07 Coding for digital transmission

Publications (1)

Publication Number Publication Date
HK42697A true HK42697A (en) 1997-04-11

Family

ID=24448144

Family Applications (1)

Application Number Title Priority Date Filing Date
HK42697A HK42697A (en) 1990-11-07 1997-04-03 Coding for digital transmission

Country Status (7)

Country Link
US (2) US5164963A (fr)
EP (1) EP0485105B1 (fr)
JP (1) JP2665092B2 (fr)
KR (1) KR950011198B1 (fr)
DE (1) DE69123948T2 (fr)
HK (1) HK42697A (fr)
SG (1) SG43761A1 (fr)

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SG43761A1 (en) 1997-11-14
JPH04313983A (ja) 1992-11-05
DE69123948D1 (de) 1997-02-13
DE69123948T2 (de) 1997-04-30
US5164963A (en) 1992-11-17
JP2665092B2 (ja) 1997-10-22
EP0485105A3 (en) 1992-09-30
EP0485105A2 (fr) 1992-05-13
US5524025A (en) 1996-06-04
KR920011270A (ko) 1992-06-27
EP0485105B1 (fr) 1997-01-02
KR950011198B1 (ko) 1995-09-29

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