Annex 1 to AVC-707R

Documents for the Singapore meeting
(1-11 November 1994)

Normal Documents

AVC number	MPEG number	Pur-pose	
Title (Source)	
AVC-673R	-	R	Report of the sixteenth Experts Group meeting in Grimstad(13-22 July 1994) - Part I and Part II (Rapporteur)	
AVC-674R	-	R	Report of the sixteenth Experts Group meeting in Grimstad(13-22 July 1994) - Part III (Rapporteur)	
AVC-675	-	R	Liaison statement to Study Group 15 (Q2/15) on B-ISDN audiographic and audiovisual conferencing on ATM (SG8 - Q.10/8)	
AVC-676	-	R	List of open issues - 16 September 1994 (Rapporteur)	
AVC-677	-	P	Multimedia System Control: a proposal for H.24P and H.24X (Rapporteur for Q.3/15)	
AVC-678	-	I&D	Computer Infrastructure Implications on AVC Function Placement (IBM)	
AVC-679	-	I	Video distribution using CBR MPEG-2 over AAL5 (IBM)	
AVC-680	-	P	Draft H.222.1 (Editor, Stuart Dunstan)	
AVC-681	-	P	Draft H.32X (Editor, Chia-Chang Li)	
AVC-682	-	P	Draft H.32Y (Editor, Hayder Radha)	
AVC-683	-	P	Draft H.32Z (Editor, Geoff Morrison)	
AVC-684	-	I	Report on BT/France Telecom H.320 codec test over ATM networks (UK)	
AVC-685	-	I	Report on European progress on AALs for Class A and B services (UK)	
AVC-686	-	P	An AAL for Class B services (BT)	
AVC-687	94/332	P	Comments on Draft ITU-T Rec. H.262|ISO/IEC 13818-2 (Rapporteur)	
AVC-688	94/331	P	Comments on Draft ITU-T Rec. H.222.0|ISO/IEC 13818-1 (Rapporteur)	
AVC-689	-	I	Reduction of the bit-rate of compressed video while in its coded form (BT Labs)	
AVC-690	-	I	Packet video transport in ATM networks with single-bit feedback (AT&T)	
AVC-691	94/348	P	Clarification of descriptor usage (Japan)	
AVC-692	-	P	Proposal for ITU-T_stream_descriptors (Japan)	
AVC-693	94/346	P	Request for  ITU-T specific stream_id in MPEG2 System (Japan)	
AVC-694	94/347	D	Integration of video frame synchronous C&I in DSM-CC (Japan)	
AVC-695	-	D	Consideration of H.222.0 Transport Stream as multimedia multiplexing for audiovisual communications (Japan)	
AVC-696	-	I	An example of call setup procedure in an H.32Z terminal (Japan)	
AVC-697	-	D	A study on use of multiple VCs (Japan)	
AVC-698	-	D&P	Mandatory H.320 interworking modes of operation for H.32X (Japan)	
AVC-699	-	D&P	Protocol model for H.32X terminal (Japan)	
AVC-700	-	D	Consideration on the optional use of AAL error correcting function at H.32X decoder (Japan)	
AVC-701	-	P	Specification of H.32X hardware for the interconnection experiment (Japan)	
AVC-702	-	D	Terminal to terminal signalling in H.32X (Siemens)	
AVC-703	-	P	Multiplexing protocols for H.222.1 (Siemens)	
AVC-704	-	R	Correspondence with Rapporteurs of SG13 and SG11 (Rapporteur)	
AVC-705	-	P	Use of AAL 5 for Carrying CBR MPEG-2 TS for video-on-demand applications (AT&T, Bellcore, IBM, MCI)	
AVC-706	-	I	ATM Forum Audiovisual and Multimedia Services (IBM) 	

Abstract

[94/nnn] indicates MPEG Document Number.

AVC-673R	[-]	Report of the sixteenth Experts Group meeting in Grimstad(13-22 July 
		1994) - Part I and Part II (Rapporteur)

This document records the outcome of the Grimstad sole sessions held in July 1994, summarizing the discussion and identifying action items.

AVC-674R	[-]	Report of the sixteenth Experts Group meeting in Grimstad(13-22 July 
		1994) - Part III (Rapporteur)

This document records the outcome of the Grimstad joint sessions held in July 1994, covering Requirements, Video and Systems sub-groups.  DSM sub-group discussions are also included.

AVC-675	[-]	Liaison statement to Study Group 15 (Q2/15) on B-ISDN audiographic 
		and audiovisual conferencing on ATM (SG8 - Q.10/8)

This document provides an SG8 view regarding the transmission of audiographic conferencing signals that the T.120 series protocols should run on a dedicated VC bypassing the H.222.1 module.  Use of AAL5, which is common with the signalling, is advocated.

AVC-676	[-]	List of open issues - 16 September 1994 (Rapporteur)

This document lists open issues which were identified until after the Grimstad meeting.  They are classified into categories of "network adaptation", "video coding and VBR", "AV terminals and systems", "miscellaneous".  Relevant projected H-series Recommendations are also listed in respective items.

AVC-677	[-]	Multimedia System Control: a proposal for H.24P and H.24X 
		(Rapporteur for Q.3/15)

This paper makes a proposal, for further consideration, on the audiovisual communication procedures in the packet based transmission environments. It draws on the experience of H.242, but seeks to avoid the deficiencies thereof: there are transmit-capabilities as well as receive-caps (H.242 had only the latter); multiple audio and video streams and other data can be declared, and the capsets are shorter. There are no commands (on the assumption that audio, video and data have their own headers), but there are content indicators, and one end-point can control what is sent to it by means of “mode requests”.  The proposal is based on variable-length (ILC) messages.  Call control procedures for ATM are also provided.

AVC-678	[-]	Computer Infrastructure Implications on AVC Function Placement 
		(IBM)

After examining four system configuration alternatives for a typical computer system which serves for audiovisual multimedia services, it is discussed that the end-to-end QOS that must be maintained for multimedia communication is from codec-to-codec, hence jitter removal should be done only once and must accommodate all sources of jitter between the source of the MPEG-2 stream and the target codec.  As a conclusion, it is proposed that jitter removal should be identified as an H.222.1 specific function and performed by the codec.

AVC-679	[-]	Video distribution using CBR MPEG-2 over AAL5 (IBM)

This document provides a reference configuration for the stored CBR MPEG-2 video distribution over ATM.  It identifies H.222.1 specific functions as 1) mapping of several TS packets onto an AAL5 SDU, 2) jitter removal and timebase recovery which are implementation specific, thus need not standardization.  The document also identifies Q.2931 signalling requirements as 1) asymmetrical QOS and bandwidth, 2) H.222.1 profile, 3) new multimedia information elements such as CBR/VBR, mapping between TS packets and AAL SDU, content and service selection request correlation ID.  It is also mentioned that the acceptable UNI-UNI end-to-end delay can be several hundred milliseconds for video distribution.

AVC-680	[-]	Draft H.222.1 (Editor, Stuart Dunstan)
AVC-681	[-]	Draft H.32X (Editor, Chia-Chang Li)
AVC-682	[-]	Draft H.32Y (Editor, Hayder Radha)
AVC-683	[-]	Draft H.32Z (Editor, Geoff Morrison)

These documents contain updated drafts which reflect discussion at the Grimstad meeting and subsequent correspondence.  Many open issues are indicated in form of editor's comments.

AVC-684	[-]	Report on BT/France Telecom H.320 codec test over ATM networks 
		(UK)

This document reports on the success of connecting two different H.320 terminals between BT Labs in Martlesham and CNET in Lannion through an ATM Virtual Circuit.  AAL1 adaptation is carried out between G.703 2048 kbit/s connection through five cross connects and adaptive clock method is employed.  It is concluded that the quality of link and coded pictures is very good.

AVC-685	[-]	Report on European progress on AALs for Class A and B services 
		(UK)

This document reports on the progress within Europe on the development of AALs for Class A and Class B services in the context of support for Audio-visual and Multimedia Services (AMS).  ETSI NA5's priorities and preferences are AAL Type 1 for Class A CBR AMS and AAL Type 2 (derived from AAL Type 1) for Class B VBR AMS.  The document concludes that the SG15 Experts Group should take account of the ETSI decision to give priority to the development of such AAL Type 1 and Type 2.

AVC-686	[-]	An AAL for Class B services (BT)

This document describes the requirements for an AAL for class B  services, that is, ones that have Variable Bit Rate (VBR) and are  delay sensitive; and offers a proposal for such AAL2.  The proposal is an extension of the existing AAL1 by replacing the SRTS fields with timestamp of about 1 MHz clock and cell rate indication fields to reduce Cell Delay Variation.  VBR is assumed to be piecewise constant here.  Possible use of FEC and interleaving is also discussed.

AVC-687	[94/332]	Comments on Draft ITU-T Rec. H.262|ISO/IEC 13818-2 (Rapporteur)
AVC-688	[94/331]	Comments on Draft ITU-T Rec. H.222.0|ISO/IEC 13818-1 
		(Rapporteur)

These two documents summarize the comments on the Draft Recommendation H.262 | ISO/IEC 13818-2 (DIS text dated 10 May 1994) and H.222.0|ISO/IEC 13818-1 (DIS text dated 10 June 1994) which have been collected from the members of the Experts Group and the ITU-TSB translator for the French text.  Two types of comments are listed; those with some possible normative change or clarification and those requiring only editorial change.

AVC-689	[-]	Reduction of the bit-rate of compressed video while in its coded form 
		(BT Labs)

This document presents a technique, operating on the coded data, for further reducing the bit rate of video already compressed with a predictive coding algorithm.  Though illustrated with a motion compensated interframe hybrid DPCM/DCT algorithm, it is also generally applicable to other predictive coding schemes, the key elements being the discarding of some coded data, the calculation of the distortion introduced and the later inclusion of correction signals as a normal part of the lower rate data.  Low additional delay and no new constraints on the originating coder are noteworthy characteristics of the method.

AVC-690	[-]	Packet video transport in ATM networks with single-bit feedback 
		(AT&T)

This contribution describes simulation results of a rate-based feedback mechanism for congestion control with real-time ABR (Available Bit Rate) video traffic.  The  results show that the rate-based mechanism is very useful for the transport of ABR video streams.  It is shown that the  visual quality of the video sequences degrades gracefully when network congestion occurs, due either to  increases in the bandwidth requirements of existing video streams or because of new video streams switching on.  It is also shown that efficient use of network resources such as buffers and link capacities can be achieved with a rate-based traffic management scheme.

AVC-691	[94/348]	Clarification of descriptor usage (Japan)

This document proposes an additional table with associated notes for ITU-T Rec. H.222.0 | ISO/IEC DIS 13818-1 to clarify the usage of descriptors.  Each descriptor is marked against program in TS/PS, Elementary Stream in TS/PS and CA,

AVC-692	[-]	Proposal for ITU-T_stream_descriptors (Japan)

This document proposes ITU-T specific descriptors for inclusion in H.222.1; descriptor tag values, ITU-T video stream descriptor, ITU-T audio stream descriptor, and ITU-T control stream descriptor.

AVC-693	[94/346]	Request for  ITU-T specific stream_id in MPEG2 System (Japan)

This document confirms the Grimstad outcome that a stream_id is required for "ITU-T auxiliary" at least to accommodate video frame synchronous C&I signals.  This is independent of possible integration of ITU-T C&I (video frame asynchronous) and DSM-CC.

AVC-694	[94/347]	Integration of video frame synchronous C&I in DSM-CC (Japan)

This document discusses the possibility to integrate video frame asynchronous C&I signals (e.g. for negotiating a common mode of operation at the start of the communication) and DSM-CC protocol in terms of standardization schedule (8 months different), flexibility in the choice of transport layer protocol and transmission efficiency.

AVC-695	[-]	Consideration of H.222.0 Transport Stream as multimedia multiplexing 
		for audiovisual communications (Japan)

This document describes a case study when H.222.0 Transport Stream is used as a possible multimedia multiplexing method for high quality videoconferencing service, presenting coding of TS packets and PES packets.  It is reported that transmission efficiency of 94 % and packetization delay of 10 ms have been obtained.  Several discussion points have also been raised; 

AVC-696	[-]	An example of call setup procedure in an H.32Z terminal (Japan)

This document presents an example of call setup procedures between a LAN audiovisual communication terminal and an ISDN H.320 terminal, where the combination of the LAN terminal and the gateway works as if an H.320 terminal.

AVC-697	[-]	A study on use of multiple VCs (Japan)

This document discusses multiple VC configuration for audiovisual communication with respect to network resource reduction and system flexibility.  It is concluded that the multiple VC is not effective in resource saving except for some particular cases, but is advantageous in the flexibility.  Use of a separate VC for the system control, DSM-CC and T.120 data is suggested.

AVC-698	[-]	Mandatory H.320 interworking modes of operation for H.32X (Japan)

This document proposes reconsideration of the Grimstad outcome "A minimum set of interworking modes of operation which H.32X terminals should support includes 2B, H0, H11 and H.12" by discussing that the receiving only type of the H.32X terminal is not required of this compatibility and that there are differing views for the symmetrical type of H.32X for conversational services.

AVC-699	[-]	Protocol model for H.32X terminal (Japan)

This document firs discusses the three alternatives for the channel which carries the control information; multiplex in the H.222.0 stream, separate VC, use of user-network signalling.  Then it proposes; 1) to construct a control protocol based in the bi-directional channel to cover both symmetrical and asymmetrical audiovisual communications, 2) protocol layering consisting of AAL5, X.224, T.125 (MCS) if relevant, application (common and service specific), 3) use of ASN.1 for representation of the control protocol.

AVC-700	[-]	Consideration on the optional use of AAL error correcting function at 
		H.32X decoder (Japan)

This document discusses three levels of support for the forward error correction; 1) mandatory at both the encoder and the decoder, 2) mandatory at the encoder but optional at the decoder, 3) optional at both the encoder and the decoder.  The second alternative is suggested.  It also compares three FEC methods in implementation and cell loss impact; 1) diagonal interleaving (I.363 short interleaver), 2) orthogonal interleaving (I.363 long interleaver), 3) parallel writing and reading (AVC-617).  The third method is suggested for the above decoder option solution.

AVC-701	[-]	Specification of H.32X hardware for the interconnection experiment 
		(Japan)

This document proposes mandatory and optional specifications for the H.32X hardware interconnection trials.  Participation is solicited for not only bi-directional equipment but also transmit or receive only terminals, servers, test signal generators.

AVC-702	[-]	Terminal to terminal signalling in H.32X (Siemens)

This document recommends to provide a unified description of H.32X signalling procedures covering both end-to-network and end-to-end signalling, and to consider use of acknowledgment procedures for sub channel establishment and release in H.222.1.  Appropriate H.222.0 syntax for "request establishment", "confirm establishment" and "confirm release" need be investigated.  It is also pointed out that AAL parameters can be included in the Q.2931 SETUP message.

AVC-703	[-]	Multiplexing protocols for H.222.1 (Siemens)

After comparing Program Stream and Transport Stream in functions, multiplexing capacity, protocol structure and implementation, and also reviewing the relationship between TS and ATM/AAL, this document proposes that the H.32X terminal should always be able to decode the Program Stream and that the TS should not be mandatory in a H.32X send terminal.

AVC-704	[-]	Correspondence with Rapporteurs of SG13 and SG11 (Rapporteur)

This document includes five correspondences to Rapporteurs of SG13 and SG11, which have been generated according to the discussion at the Grimstad meeting: 1) priority and error indication primitive parameters at ALL-SAP, 2) network performance assumptions, 3) audiovisual services between the two terminals accommodated in B-ISDN and N-ISDN, 4) AAL1 short interleaver, circuit transport and support of SDT, 5) negotiation and signalling of an operational mode of multimedia multiplex and synchronization.

AVC-705	[-]	Use of AAL 5 for Carrying CBR MPEG-2 TS for video-on-demand 
		applications (AT&T, Bellcore, IBM, MCI)

This document proposes that AAL5 be used as the AAL to transport MPEG-2 TS in CBR video-on-demand applications and provides a rationale for this choice.

AVC-706	[-]	ATM Forum Audiovisual and Multimedia Services (IBM) 

This document gives an overview of the SA&A activities covering SA&A framework, AMS system structure, summary of the September meeting highlighting CBR VOD systems, and the next meeting.

Temporary Documents

Number	Source	Title	
TD-1	Rapporteur	Agenda for the sole sessions	
TD-2	Rapporteur	Available documents for the Singapore meeting	
TD-3	Rapporteur	H.32X network adaptation protocol reference model	
TD-4	John Morris	Report of ad hoc group on Systems-related Video issues	
TD-5	John Morris	DIS modification to accommodate Systems-related Video issues	
TD-6	M. Nilsson, 
J. Rosengren	Proposal for a Real-Time Interface Specifications	
TD-7	Rapporteur	Draft summary of the Tuesday discussion	
TD-8	Rapporteur	Comparison of the protocol configuration for audiovisual communication terminals	
TD-9 (rev)	R. ter Horst	Report of the discussion on AAL issues	
TD-10 (rev)	S. Dunstan	Group discussion on H.32X call phase and H.222.1 signalling	
TD-11	Rapporteur	Draft summary of the Thursday discussion	
TD-12	C-C. Li	H.32X terminal capability structure	
TD-13	C-C. Li	Harmonization with DSM-CC	
TD-14	Rapporteur	Chronicle of H.32Z discussion	
TD-15	WG B of WP1/9	Draft ITU-T Recommendation - Transport of MPEG2 constant bit rate television signals in B-ISDN	
TD-16	Rapporteur	Draft report of the sole sessions in Singapore	
TD-17	ITU-T EG	Specification for RTI	
TD-18	ITU-T EG	Harmonization of ITU-T C&I and DSM-CC	

END