Annex 4 to AVC-707R

ITU-T SG15 Experts Group	ISO/IEC JTC1/SC29/WG11	
TD No. 17 (Singapore)	MPEG94/429	
November 4, 1994	November 4, 1994	

Source:	ITU-T SG15 Experts Group for Video Coding and Systems in ATM and Other Network Environments
Title:	Specification for RTI
Purpose:	Proposal
Relevant sub-group: Systems

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At the ITU-T Experts Group sole sessions held on November 1, 3 and 4 in Singapore, we discussed the RTI (Real Time Interface) of the H.222.0|ISO/IEC 13818-1 decoder in the context of network adaptation of the H.32X audiovisual terminal.  One of the issues is where to allocate jitter removal functionality in the network adaptation.  

The following is the outcome of the meeting:

1) We propose to specify the RTI in ITU-T Rec. H.222.0|ISO/IEC 13818-1 to facilitate the equipment designing.

2) We suggest 1 ms for the jitter tolerance specification.  This is based on our ATM network performance assumption [1] where the average case scenario indicates 0.5 - 1 ms Cell Delay Variation for CBR services.

It is noted that the above is to amplify the comment T44 in MPEG94/331 | AVC-688.

Reference

[1]	AVC-635 ATM Performance Assumptions (AVC Experts Group), July 1994.