ISO/IEC 14496-4:2004/Amd 5:2005

INTERNATIONAL ISO/IEC
STANDARD 14496-4
Second edition
2004-12-15
AMENDMENT 5
2005-04-15
Information technology — Coding of
audio-visual objects —
Part 4:
Conformance testing
AMENDMENT 5: Conformance extensions
for error-resilient simple scalable profile
Technologies de l’information — Codage des objets audiovisuels —
Partie 4: Essai de conformité
AMENDEMENT 5: Extensions de conformité pour profil «error-resilient
simple scalable»
Reference number
ISO/IEC 14496-4:2004/Amd.5:2005(E)
©
ISO/IEC 2005
ISO/IEC 14496-4:2004/Amd.5:2005(E)
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ii © ISO/IEC 2005 – All rights reserved

ISO/IEC 14496-4:2004/Amd.5:2005(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 International 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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 5 to ISO/IEC 14496-4:2004 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 2005 – All rights reserved iii

ISO/IEC 14496-4:2004/Amd.5:2005(E)
Introduction
In ISO/IEC 14496-2:2004, the bitstream syntax of the Simple Scalable Profile does not allow the use of the
error resilience tools. As the enhancement layer can only be decoded if it is received error-free this limits the
use of scalable video to error-free communication environments. This would exclude mobile communications,
a significant future market for MPEG-4 SSP.
Scalable video can be quite useful in many other applications. For instance, matching different or varying
network bandwidths, video multicast to heterogeneous end systems and more importantly, providing different
subjective quality of video content to subscribers of a given video service depending on their network tariffs
and viewing preferences.
As such a set of bitstreams which should be used for conformance testing of MPEG-4 Error Resilient Simple
Scalable Profile is proposed.
iv © ISO/IEC 2005 – All rights reserved

ISO/IEC 14496-4:2004/Amd.5:2005(E)

Information technology — Coding of audio-visual objects —
Part 4:
Conformance testing
AMENDMENT 5: Conformance extensions for error-resilient simple
scalable profile
Add the following to 5.5.3.1:
5.5.3.1.36 Test bitstream #L0bGE-1
Specification: This bitstream tests dynamic performance of the decoder. It puts stress on a decoder at Level
L0b of the Simple Profile. It has a bitrate close to the maximum allowed at Level L0b. It utilizes extensively the
maximum allowed VBV buffer size. The default values are used for the VBV parameters vbv_buffer_size and
vbv_occupancy, as defined in Annex D of ISO/IEC 14496-2 “Video buffering verifier”.
Functional stage: Prediction bandwidth

Add the following subclauses after 5.5.3.3, and change the subclause numbers after those subclauses
...