IEC PAS 61883-6:1998

Consumer audio/video equipment - Digital interface - Part 6: Audio and music data transmission protocol

A PAS is a technical specification not fulfilling the requirements for a standard, but made available to the public and established in an organization operating under given procedures. IEC-PAS 61883-6 was submitted by the 1394 Trade Association. Applies to all modules or devices which have any kind of audio and/or music data processing, generation and conversion function blocks. All modules or devices which implement this A/M protocol should have the capability of "arbitrated short bus reset" defined in IEEE-P1394a in order to prevent the interruption of audio and music data transmission when a bus reset occurs.

General Information

• Status: Replaced
• Publication Date: 01-Jun-1998
• ICS: 33.160.01 - Audio, video and audiovisual systems in general
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: TC 100 - Audio, video and multimedia systems and equipment
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 14-Oct-2002

Relations

• Replaced By: IEC 61883-6:2002 - Consumer audio/video equipment - Digital interface - Part 6: Audio and music data transmission protocol
• Effective Date: 05-Sep-2023

Standards Content (Sample)

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Edition 1.0
1998-05
Consumer audio/video equipment —
Digital interface —
Part 6: Audio and music data transmission protocol

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IN TER N A TION AL Reference number
E L E C T R OT E CHNI CA L
IEC/PAS 61883-6
C O MMI S S I O N
Audio and Music Data Transmission
Protocol
Version 1.0
May 1997
Sponsored by:
Audio/Video Working Group of the 1394 Trade Association
Approved for Release by:
1394 Trade Association Steering Committee
Abstract: This specification defines a protocol for the transmission of audio and music data
over IEEE Std. 1394-1995. Currently this includes the transport of IEC 60958 digital format,
raw audio samples, and MIDI data.

1394 Trade Association
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http://www.1394TA.org
Copyright  1996-1997 by the 1394 Trade Association. Permission is granted to members of the 1394 Trade Association to reproduce this
document for their own use or the use of other 1394 Trade Association members only, provided this notice is included. All other rights
reserved. Duplication for sale, or for commercial or for-profit use is strictly prohibited without the prior written consent of the 1394 Trade
Association.
Copyright  1998, IEC
Copyright © 1996-1997, 1394 Trade Association; 1998, IEC

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
CONSUMER AUDIO/VIDEO EQUIPMENT — DIGITAL INTERFACE —

Part 6: Audio and music data transmission protocol

FOREWORD
A PAS is a technical specification not fulfilling the requirements for a standard, but made

available to the public and established in an organization operating under given

procedures.
IEC-PAS 61883-6 was submitted by the 1394 Trade Association and has been processed
by subcommittee 100C: Audio, video and multimedia subsystems and equipment, of IEC
technical committee 100: Audio, video and multimedia systems and equipment.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document:
Draft PAS Report on voting
100C/209/PAS 100C/222/RVD
Following publication of this PAS, the technical committee or subcommittee concerned
will investigate the possibility of transforming the PAS into an International Standard.
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is
to promote international co-operation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International
Standards. Their preparation is entrusted to technical committees; any IEC National Committee
interested in the subject dealt with may participate in this preparatory work. International, governmental
and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has
representation from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in
the form of standards, technical reports or guides and they are accepted by the National Committees in
that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC
International Standards transparently to the maximum extent possible in their national and regional
standards. Any divergence between the IEC Standard and the corresponding national or regional
standard shall be clearly indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for
any equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this PAS may be the subject of patent
rights. The IEC shall not be held responsible for identifying any or all such patent rights.
Page 1
Copyright © 1996-1997, 1394 Trade Association; 1998, IEC
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Austin, TX 78759
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page 2 .
Copyright © 1996-1997, 1394 Trade Association; 1998, IEC

Table of Contents
INTRODUCTION.4

SCOPE OF THE AUDIO AND MUSIC DATA TRANSMISSION PROTOCOL .4

REFERENCES.4

DEFINITIONS AND ABBREVIATIONS .4

Abbreviations and Acronyms .4
Technical glossary .4
BIT, BYTE AND QUADLET ORDERING.5

PACKET HEADER FOR AUDIO AND MUSIC DATA .6

ISOCHRONOUS PACKET HEADER FORMAT.6

CIP HEADER FORMAT .6

PACKETIZATION.7
PACKET TRANSMISSION METHOD.7
TRANSMISSION OF TIMING INFORMATION .7
TIME STAMP PROCESSING .7
TRANSMISSION CONTROL.8
EVENT TYPES.11
AM824 DATA .13
Generic Format.13
IEC958 Conformant Data.13
Raw Audio Data.14
MIDI Conformant Data .14
32-BIT FLOATING POINT DATA.15
24-BIT * 4 AUDIO PACK .15
SUBFORMAT.17
BASIC FORMAT.17
SPECIAL FORMAT .18
APPENDIX A: BLOCKING TRANSMISSION METHOD (NORMATIVE).19
APPENDIX B: PACKETIZATION OF IEC 60958 DATA (NORMATIVE).20
APPENDIX C: SYNCHRONIZATION ISSUES (INFORMATIVE).21
DELIVERY OF SAMPLING CLOCK OF ARBITRARY FREQUENCY .21

Page 3
Copyright © 1996-1997, 1394 Trade Association; 1998, IEC

Introduction
Scope of the Audio and Music Data Transmission Protocol

This document defines the audio and music data transmission protocol as an instance of a

real-time data transmission protocol standardized in IEC 61883-1. The audio and music

data transmission protocol (hereafter referred to as the A/M protocol) can be applied to all

modules or devices which have any kind of audio and/or music data processing, generation

and conversion function blocks.

This specification deals only with the transmission of audio and music data; the control,

status and machine readable description of these modules or devices should be defined
outside of this specification according to each application area.
All modules or devices which implement this A/M protocol should have the capability of
"arbitrated short bus reset" defined in IEEE P1394a in order to prevent the interruption of
audio and music data transmission when a bus reset occurs.
References
This document assumes that the reader is familiar with the content of the reference
material noted here; it does not attempt to provide introductory or background information
which can be found elsewhere. For a complete und
...