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ITU-T H.320 (03/2004)

Narrow-band visual telephone systems and terminal equipment

This Recommendation 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. This revised version of H.320 introduces a number of enhancements and clarifications to the previous version, primarily the description on the usage of ITU-T Recs G.722.1, H.239, H.241, H.264, and ISO/IEC 14496-3 in H.320 systems.

Citation:	https://handle.itu.int/11.1002/1000/7229
Series title:	H series: Audiovisual and multimedia systems H.200-H.499: Infrastructure of audiovisual services H.300-H.349: Systems and terminal equipment for audiovisual services
Approval date:	2004-03-15
Provisional name:	AV.320
Approval process:	AAP
Status:	In force
Maintenance responsibility:	ITU-T Study Group 16
Further details:	Patent statement(s) Development history

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
6	H.320 (03/2004)	In force	here	here	here
5	H.320 (05/1999)	Superseded	here	here	here
4	H.320 (07/1997)	Superseded	-	-	here
3	H.320 (03/1996)	Superseded	-	here	here
2	H.320 (03/1993)	Superseded	-	here	here
1	H.320 (12/1990)	Superseded	-	here	here


ITU-T Supplement	Title	Status	Summary	Table of contents	Download
H Suppl. 6 (04/2006)	Control load quantum for decomposed gateways	In force	here	here	here
H Suppl. 9 (05/2008)	Gateway control protocol: Operation of H.248 with H.225.0, SIP, and ISUP in support of emergency telecommunications service (ETS)/international emergency preference scheme (IEPS)	In force	here	here	here
H Suppl. 11 (02/2009)	Analysis of class-based home network QoS solutions	In force	here	here	here
H Suppl. 12 (11/2013)	Gateway control protocol: Priority traffic treatment by ITU-T H.248 gateways	In force	here	here	here
H Suppl. 13 (10/2015)	Gateway control protocol: Common ITU-T H.248 terminology - Release 2	In force	here	here	here
H Suppl. 14 (10/2015)	Gateway control protocol: SDP codepoints for gateway control - Release 2	In force	here	here	here
H Suppl. 15 (01/2017)	Conversion and coding practices for HDR/WCG Y'CbCr 4:2:0 video with PQ transfer characteristics	In force	here	here	here
H Suppl. 17 (11/2014)	Guide for addressing accessibility in standards	In force	here	here	here
H Suppl. 18 (10/2017)	Signalling, backward compatibility and display adaptation for HDR/WCG video coding	In force	here	here	here
H Suppl. 19 (04/2021)	Usage of video signal type code points	In force	here	here	here

Title	Approved on	Download
Testing of personal audio systems for compliance with ITU-T H.870 (2018)	2024
Testing of personal audio systems for compliance with ITU-T H.870 (2018)	2021	here
AMS Requirements	2011	here
Telecommunications Accessibility Checklist	2006	here

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ITU-T Recommendations

ITU-T H.320 (03/2004)