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ITU-T H.263 Annex X (03/2004)

Profiles and levels definition

This annex contains a list of preferred feature combinations, which are structured into "profiles" of support. It also defines some groupings of maximum performance parameters as "levels" of support for these profiles. This annex adds a new level (denoted level 45) to provide a conformance point with relatively low resolution but with higher bit rate support at that resolution than what was provided in the previously-defined levels. The new level also provides the capability to support low-resolution custom picture formats and custom picture clock frequencies.

Citation:	https://handle.itu.int/11.1002/1000/7228
Series title:	H series: Audiovisual and multimedia systems H.200-H.499: Infrastructure of audiovisual services H.260-H.279: Coding of moving video
Approval date:	2004-03-15
Approval process:	AAP
Status:	Superseded
Maintenance responsibility:	ITU-T Study Group 21
Further details:	Patent statement(s) Development history

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
3.1	H.263 App. III (06/2001)	In force	here	here	here
3	H.263 (01/2005)	In force	here	here	here
2.7	H.263 Annex X (03/2004)	Superseded	here	here	here
2.5	H.263 App. II (06/2001)	Superseded	-	-	here
2.4	H.263 Annex X (04/2001)	Superseded	here	here	here
2.3	H.263 Annex W (11/2000)	Superseded	here	here	here
2.2	H.263 Annex V (11/2000)	Superseded	here	here	here
2.1	H.263 Annex U (11/2000)	Superseded	here	here	here
2	H.263 (02/1998)	Superseded	here	here	here
1.1	H.263 App. I (03/1997)	Superseded	-	here	here
1	H.263 (03/1996)	Superseded	-	here	here


ITU-T Supplement	Title	Status	Summary	Table of contents	Download
H Suppl. 1 (05/1999)	Application profile – Sign language and lip-reading real-time conversation using low bit rate video communication	In force	here	here	here
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
H Suppl. 21 (01/2025)	Film grain synthesis technology for video applications	In force	here	-	here

Title	Approved on	Download
Implementers' Guide for Recommendation ITU-T H.263: "Video coding for low bit rate communication"	2005-08-05	here

Title	Approved on	Download
Testing of personal audio systems for compliance with ITU-T H.870 (2018)	2024	here
Testing of personal audio systems for compliance with ITU-T H.870 (2018)	2021	here
Media coding toolbox for IPTV: Audio and video codecs	2016	here
Telecommunications Accessibility Checklist	2006	here

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ITU-T H.263 Annex X (03/2004)