| Sistemas de transmisión de segunda generación para los servicios interactivos de televisión por cable – Módems de cable para protocolo Internet |
En esta Recomendación se describen sistemas de transmisión coherentes con los descritos en la Recomendación UIT-T J.112. Tiene por finalidad proporcionar una tecnología que permite satisfacer la demanda de servicios simétricos en las redes de cable. Esta tecnología de la segunda generación, al utilizar el mismo canal RF, es compatible con versiones anteriores la de la Recomendación UIT-T J.112. Proporciona un sensible aumento de la capacidad de canales en el sentido de retorno, así como canales más anchos, una velocidad de símbolos más alta y una mayor eficiencia espectral. Prevé la codificación para los sistemas CDMA síncrono y TDMA avanzado e incluye capacidades de modulación de orden superior. Ofrece una mayor inmunidad contra el ruido y una mayor protección multitrayecto que la tecnología que sirve de base a la Recomendación UIT-T J.112. |
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| Citation: |
https://handle.itu.int/11.1002/1000/9302 |
| 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: |
2007-12-14 |
| Provisional name: | J.rfi2gen |
| 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
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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
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-
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here
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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
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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
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here
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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
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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
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here
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here
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here
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| Title |
Approved on |
Download |
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Implementers' Guide for Recommendation ITU-T J.122
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2004-02-01
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here
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