I have produced a draft of the white paper for version 5 of H.245. It is available at ftp://standard.pictel.com/avc-site/Incoming/drafth~1.zip Change marks are relative to the previously decided version (version 4).

This includes:

This contribution, known as H245WCMH, provides text for version 5 of Recommendation H.245 "Control protocol for multimedia communication". Changes are shown relative to the decided version 4, known as H245NCMF. It has been created from H245NCMF, and the changes determined in the September 1998 meeting of SG16 in TD 39 (PLEN). The version number in the syntax has been changed and Annex D has been updated to reference the new version.

The following additions were also made as a result of the Torino meeting of Q.11/12/13/14.

1) The improved version of generic capabilities, given in TD-08A of the Torino meeting of Q.11/12/13/14, has replaced the corresponding text in TD39 (PLEN). In addition, the editor has added the GenericCapability structure to MultiplexCapability and ModeElement, and added a subIdentifier field to the Object Identifier of the GenericCapability structure to allow different sets of parameters belonging to the same recommendation, and hence sharing a CapabilityIdentifier, to be distinguished. The first use of this additional parameter is to distinguish the Logical Channel Bit Rate Capability and the MPEG-4 Visual Capabilitities that have been defined to share the CapabilityIdentifier 'ITU-T Recommendation H.245 Version 5'.

2) Added the MPEG-4 Visual capability codepoints in the object orientated capability syntax, its description being given in Annex E. This has been done according to the document 'H245V5White_MPEG4Visual.doc' that was distributed by e-mail.

3) APC-1440 has been included. This includes FlowControlIndication, the Logical Channel Bit Rate Change procedure and the signalling of its capability. The indication of this capability has been moved by the editor to the Capability structure to make it available to all terminals (not just H.323), and has been represented by the object orientated capability syntax, its description being given in Annex F.

4) All capabilities have been added using the object orientated syntax for capabilities. However, the ASN.1 representation has been included in Appendix VIII in case this syntax is not accepted. If the object orientated syntax is accepted, then Apendix VIII should be deleted.

But it does not include a codepoint for RDC and improvements to the semantics for error handling for video codecs similar to that for H.320/H230 - could someone please send me the appropriate text.

I would appreciate comments as soon as possible as the submission deadline is approaching. In particular, could everyone who has proposed inclusions please check that I have included them completely and correctly

Best regards

Mike Nilsson

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