| Spécifications de l'interface du service de transmission de données par câble: interface radiofréquence utilisant la technique de modulation en quadrature |
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La présente annexe comporte les descriptions du QAM256 pour le sens descendant et du QAM16 pour le sens montant dans la couche Physique. Ces fonctions de modulation permettent aux réseaux de télévision par câble de transmettre des données de programme à grande vitesse ainsi que des paquets IP. Cependant le changement le plus significatif de la présente annexe révisée est l'amélioration des descriptions de la couche MAC pour les services orientés qualité de service tels que la voix sur IP et la vidéo sur IP. L'amélioration comporte l'extension du format de trame MAC, l'extension pour la fonction de commande de qualité de service, l'extension d'en-tête de charge utile et l'extension multidiffusion. |
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| Citation: |
https://handle.itu.int/11.1002/1000/5652 |
| Series title: |
J series: Cable networks and transmission of television, sound programme and other multimedia signals
J.110-J.129: Interactive systems for digital television distribution (DOCSIS first and second generations) |
| Approval date: |
2002-02-13 |
| Provisional name: | J.isc |
| Approval process: | AAP |
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Status: |
In force |
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Maintenance responsibility: |
ITU-T Study Group 21 |
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Further details: |
Patent statement(s)
Development history
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ITU-T Supplement
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Title
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Status
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Summary
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Table of contents
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Download
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J Suppl. 1 (11/1998)
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Example of linking options between annexes of ITU-T Recommendation J.112 and annexes of ITU-T Recommendation J.83
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In force
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-
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here
|
here
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J Suppl. 2 (11/1998)
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Guidelines for the implementation of annex A of Recommendation J.112, "Transmission systems for interactive cable television services" – Example of digital video broadcasting (DVB) interaction channel for cable television distribution
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In force
|
-
|
here
|
here
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J Suppl. 3 (11/1998)
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Guidelines for the implementation of Recommendation J.111 "Network independent protocols" – Example of digital video broadcasting (DVB) systems for interactive services
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In force
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-
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here
|
here
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J Suppl. 5 (09/1999)
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Guidelines on the use of some ITU-T Recommendations in the J series
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In force
|
here
|
here
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here
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J Suppl. 6 (09/2016)
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Ultra high definition television cable transmission with functions defined in Recommendations ITU-T J.183, ITU-T J.288 and ITU-T J.94
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In force
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here
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here
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here
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J Suppl. 7 (04/2021)
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Embedded common interface (ECI) for exchangeable CA/DRM solutions; Guidelines for the implementation of ECI
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In force
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here
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here
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here
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J Suppl. 8 (04/2021)
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Embedded common interface (ECI) for exchangeable CA/DRM solutions; Trust environment
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In force
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here
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here
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here
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J Suppl. 9 (04/2020)
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Embedded common interface for exchangeable CA/DRM solutions; System validation
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In force
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here
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here
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here
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J Suppl. 10 (09/2024)
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Correspondence between CableLabs DOCSIS Specifications and ITU-T J-series Recommendations
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In force
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here
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here
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here
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J Suppl. 11 (10/2025)
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Guidelines for installing a digital television service for cable networks based on ITU-T Recommendations
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In force
|
here
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here
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here
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J Suppl. 14 (01/2025)
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Use cases of microservices architecture for audiovisual media in the converged media cloud
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In force
|
here
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here
|
here
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| Title |
Approved on |
Download |
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Implementers' Guide for Recommendation ITU-T J.112 Annex B (03/01)
|
2003-04-01
|
here
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