INTERNATIONAL ISO/IEC STANDARD 13818-9 First edition 1996-12-15 Information technology - Generic coding of moving pictures and associated audio information - Part 9: Extension for real time interface for systems decoders Technologies de f'information -- Codage generique des images animees etdes informationssonoresassociees Partie9:Extensionpourinterfacetemps réelpoursystemes decodeurs IEC ISO Reference number ISO/IEC 13818-9:1996(E) IS0/IEC13818-9:1996(E) Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of Inter- national Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. International Standard ISO/IEC 13818-9 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. ISO/IEC 13818 consists of the following parts, under the general title Information technology -- Generic coding of moving pictures and associated audio information: Part 1: Systems Part 2: Video Part 3: Audio - Part 4: Compliance testing Part 6: Extensions for DSM-CC Part 9: Extension for real time interface for systems decoders ?ISO/IEC1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or ns,electronic or mechanical,includingphotocopying andmicro film, without permission in writing from the publisher. ISO/IEC Copyright Office·Case postale 56.CH-1211 Geneve 20·Switzerland Printed in Switzerland ii @ISO/IEC IS0/IEC13818-9:1996(E) Introduction Conformance for ISO/IEC 13818-1 Transport Streams is specified in terms of the normative specifications defined therein. These specifications include, among other requirements, a Transport Stream System Target Decoder (T-STD) (ISO/IEC 13818-1, 2.4.2) which specifies the behaviour of an idealized decoder when the stream is input to such a decoder. The T-STD model, and the associated verification, do not include information concerning the stream in real time. This part of ISO/IEC 13818 specifies the timing of the real-time delivery of the bytes of Transport Stream packets at a Real Time Interface (RTI). Equipment which includes some type of interface for Transport Stream data, the timing characteristics of which are said to comply with the RTI specification, must be able to operate In no case, however, is a piece of equipment required to implement anRTIinterface.