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H.320 or Narrow-band visual telephone systems and terminal equipment is an umbrella Recommendation by the ITU-T for running Multimedia (Audio/Video/Data) over ISDN based networks. The main protocols in this suite are H.221, H.230, H.242, audio codecs such as G.711 (PCM) and G.728 (CELP), and discrete cosine transform (DCT) video codecs such as H.261 and H.263. Narrow-band for this specification is defined as bit rates ranging from 64 kbit/s to 1920 kbit/s. This channel capacity may be provided as a single B/H0/H11/H12-channel or multiple B/H0-channels in ISDN.

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  • H.320 (en)
  • H.320 (es)
  • H.320 (fr)
  • H.320 (it)
  • H.320 (ja)
  • H.320 (ru)
rdfs:comment
  • H.320 とは、ISDNに基づくネットワーク上でのマルチメディア（音声/動画/データ）通信のためにITU-Tが定めた包括推奨規格。主プロトコルは、H.221、H.230、H.242、音声コーデックとしては、G.711、G.723、ビデオコーデックとしては、H.261、H.263 が採用されている。 (ja)
  • L'H.320 è un protocollo di comunicazione ideato per consentire la trasmissione audio/video su linee digitali ISDN. Questo permette di inviare e ricevere contenuti multimediali come videoconferenze, videochiamate e immagini. La trasmissione avviene in digitale, indipendentemente dalla velocità adottata dalla connessione ISDN. La digitalizzazione permette di usare standard di compressione video QCIF e CIF, rispettivamente per la videotelefonia e la videoconferenza.Il protocollo H.320 è sempre accompagnato da una MCU. In pratica, l'MCU si occupa di gestire le chiamate e gli ingressi audio e video. Esso, infatti, mixa e passa rapidamente il flusso multimediale tra gli utenti collegati, in modo che questi possano partecipare alla conferenza. (it)
  • H.320 — набор рекомендаций ITU для видеоконференций и передачи мультимедиа посредством сети ISDN. Включает в себя требования к обработке аудио- и видеоинформации, описывает универсальные форматы для обеспечения совместимости различных устройств ввода-вывода звука и видеоизображения, определяет протоколы для взаимодействия систем конференций и синхронизации аудио- и видеосигналов. Основными составляющими стандарта являются протоколы , /, /, аудиокодек G.711, видеокодеки H.261 и H.263. (ru)
  • H.320 or Narrow-band visual telephone systems and terminal equipment is an umbrella Recommendation by the ITU-T for running Multimedia (Audio/Video/Data) over ISDN based networks. The main protocols in this suite are H.221, H.230, H.242, audio codecs such as G.711 (PCM) and G.728 (CELP), and discrete cosine transform (DCT) video codecs such as H.261 and H.263. Narrow-band for this specification is defined as bit rates ranging from 64 kbit/s to 1920 kbit/s. This channel capacity may be provided as a single B/H0/H11/H12-channel or multiple B/H0-channels in ISDN. (en)
  • Los sistemas y equipos terminales de telefonìa visual de banda estrecha o H.320 es una Recomendación general de ITU-T para ejecutar Multimedia (audio/ vídeo/datos) en redes basadas en ISDN. Los principales protocolos de esta suite son H.221, H.230, H.242, códecs de audio como G.711 (PCM) y G.728 (CELP), y códecs de vídeo de transformación de coseno discreta (DCT) vídeo codecs como H.261 y H.263.​ (es)
  • H.320 est un protocole et une recommandation définie par l'UIT-T le 27 mai 1999 comme : « Systèmes et équipements terminaux visiophoniques à bande étroite ». Il définit les terminaux, type téléphone, station de visioconférence..., connectés sur le réseau RNIS. Les principaux protocoles appartenant à cette suite sont , , , les codecs audio comme G.711 et vidéo comme H.261 et H.263. Il spécifie les caractéristiques techniques des systèmes et équipements de terminaux visiophoniques à bande étroite typiquement pour des services de visioconférence et de visiophonie. (fr)
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long name
  • Narrow-band visual telephone systems and terminal equipment (en)
organization
related standards
  • H.221, H.230, H.242, H.261, H.262, H.263, H.264, H.265 (en)
status
  • Published (en)
title
  • H.320 (en)
version
  • (en)
version date
  • March 2004 (en)
website
year started
has abstract
  • H.320 or Narrow-band visual telephone systems and terminal equipment is an umbrella Recommendation by the ITU-T for running Multimedia (Audio/Video/Data) over ISDN based networks. The main protocols in this suite are H.221, H.230, H.242, audio codecs such as G.711 (PCM) and G.728 (CELP), and discrete cosine transform (DCT) video codecs such as H.261 and H.263. It is formally named as Narrow-band visual telephone systems and terminal equipment. It specifies technical requirements for narrow-band visual telephone systems and terminal equipment, typically for videoconferencing and videophone services. It describes a generic system configuration consisting of a number of elements which are specified by respective ITU-T Recommendations, definition of communication modes and terminal types, call control arrangements, terminal aspects and interworking requirements. The service requirements for visual telephone services are presented in ITU-T Recs F.720 for videotelephony and F.702 for videoconference. Video and audio coding systems and other technical aspects common to audiovisual services are covered in other Recommendations in the H.200/F.700-series. Narrow-band for this specification is defined as bit rates ranging from 64 kbit/s to 1920 kbit/s. This channel capacity may be provided as a single B/H0/H11/H12-channel or multiple B/H0-channels in ISDN. Used video codecs: H.261, and optionally H.262, H.263, H.264 according to the video hierarchy specified in specification, and in ITU-T Recs H.241 and H.242. H.261 is mandatory in any enhanced H.320 system with video capability. Baseline H.263 capability shall be required in systems that use enhanced video modes. Used audio codecs: G.711, and optionally G.722, G.728, G.723.1, G.729. (Example of usage: If a visual telephone interworks with a wideband speech terminal, G.722 audio may be used instead of G.711 audio.) (en)
  • Los sistemas y equipos terminales de telefonìa visual de banda estrecha o H.320 es una Recomendación general de ITU-T para ejecutar Multimedia (audio/ vídeo/datos) en redes basadas en ISDN. Los principales protocolos de esta suite son H.221, H.230, H.242, códecs de audio como G.711 (PCM) y G.728 (CELP), y códecs de vídeo de transformación de coseno discreta (DCT) vídeo codecs como H.261 y H.263.​ Se denomina formalmente como equipos terminales y sistemas telefónicos visuales de banda estrecha. Especifica los requisitos técnicos sistemas telefónicos visuales de banda estrecha y equipos terminales, típicamente para servicios de videoconferencia y videteléfono. Describe una configuración de sistema genérica que consta de varios elementos que se especifican en las respectivas recomendaciones de UIT-T, la definición de los modos de comunicación y los tipos de terminales, las disposiciones de control de llamadas, los aspectos de los terminales y los requisitos de interfuncionamiento.​ (es)
  • H.320 est un protocole et une recommandation définie par l'UIT-T le 27 mai 1999 comme : « Systèmes et équipements terminaux visiophoniques à bande étroite ». Il définit les terminaux, type téléphone, station de visioconférence..., connectés sur le réseau RNIS. Les principaux protocoles appartenant à cette suite sont , , , les codecs audio comme G.711 et vidéo comme H.261 et H.263. Il spécifie les caractéristiques techniques des systèmes et équipements de terminaux visiophoniques à bande étroite typiquement pour des services de visioconférence et de visiophonie. La bande étroite telle définie dans cette spécification pour des débits variant de 64 kbit/s à 1 920 kbit/s. (fr)
  • H.320 とは、ISDNに基づくネットワーク上でのマルチメディア（音声/動画/データ）通信のためにITU-Tが定めた包括推奨規格。主プロトコルは、H.221、H.230、H.242、音声コーデックとしては、G.711、G.723、ビデオコーデックとしては、H.261、H.263 が採用されている。 (ja)
  • L'H.320 è un protocollo di comunicazione ideato per consentire la trasmissione audio/video su linee digitali ISDN. Questo permette di inviare e ricevere contenuti multimediali come videoconferenze, videochiamate e immagini. La trasmissione avviene in digitale, indipendentemente dalla velocità adottata dalla connessione ISDN. La digitalizzazione permette di usare standard di compressione video QCIF e CIF, rispettivamente per la videotelefonia e la videoconferenza.Il protocollo H.320 è sempre accompagnato da una MCU. In pratica, l'MCU si occupa di gestire le chiamate e gli ingressi audio e video. Esso, infatti, mixa e passa rapidamente il flusso multimediale tra gli utenti collegati, in modo che questi possano partecipare alla conferenza. (it)
  • H.320 — набор рекомендаций ITU для видеоконференций и передачи мультимедиа посредством сети ISDN. Включает в себя требования к обработке аудио- и видеоинформации, описывает универсальные форматы для обеспечения совместимости различных устройств ввода-вывода звука и видеоизображения, определяет протоколы для взаимодействия систем конференций и синхронизации аудио- и видеосигналов. Основными составляющими стандарта являются протоколы , /, /, аудиокодек G.711, видеокодеки H.261 и H.263. (ru)
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