ISO/IEC 14496-15:2010/Amd 1:2011
(Amendment)Information technology — Coding of audio-visual objects — Part 15: Advanced Video Coding (AVC) file format — Amendment 1: Sub-track definitions
Information technology — Coding of audio-visual objects — Part 15: Advanced Video Coding (AVC) file format — Amendment 1: Sub-track definitions
Technologies de l'information — Codage des objets audiovisuels — Partie 15: Format de fichier de codage vidéo avancé (AVC) — Amendement 1: Définitions des sous-pistes
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Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 14496-15
Second edition
2010-06-01
AMENDMENT 1
2011-11-01
Information technology — Coding of
audio-visual objects —
Part 15:
Advanced Video Coding (AVC) file format
AMENDMENT 1: Sub-track definitions
Technologies de l'information — Codage des objets audiovisuels —
Partie 15: Format de fichier de codage vidéo avancé (AVC)
AMENDEMENT 1: Définitions des sous-pistes
Reference number
ISO/IEC 14496-15:2010/Amd.1:2011(E)
©
ISO/IEC 2011
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ISO/IEC 14496-15:2010/Amd.1:2011(E)
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ISO/IEC 14496-15:2010/Amd.1:2011(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 1 to ISO/IEC 14496-15:2010 was prepared by Joint Technical Committee ISO/IEC JTC 1,
Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia
information.
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ISO/IEC 14496-15:2010/Amd.1:2011(E)
Information technology — Coding of audio-visual objects —
Part 15:
Advanced Video Coding (AVC) file format
AMENDMENT 1: Sub-track definitions
In Clause 5, add the following subclause:
5.3.17 Post-decoder requirements scheme for signalling of SEI for AVC
5.3.17.1 General
In order to handle situations where the file author requires certain actions on the player or renderer, the ISO
base media file format specifies the restricted-video mechanism where sample entries are hidden behind the
generic sample entry ‘resv’. The mechanism applies to AVC and for this case a file author can list occurring
SEI message IDs [ISO/IEC 14496-10] and classify them into two categories: those that are deemed required
by the file author for correct playback, and others. The occurrence of either type of SEI messages can be
signalled in the SEI Information box.
The scheme for signalling of SEI for AVC is defined here.
The SchemeType ‘aSEI’ (AVC SEI) is used.
5.3.17.2 SEI Information box
5.3.17.2.1 Definition
Box Type: ‘seii’
Container: Scheme Information box (‘schi’)
Mandatory: Yes (when the SchemeType is ‘aSEI’)
Quantity: One
The SEI Information box is contained in the Scheme Information box when the SchemeType is ‘aSEI’, and
contains information about the SEI messages present in the AVC stream. Although the SEI messages are not
required for decoding, the file author may require certain actions for rendering or other purposes. The box
distinguishes between SEI which is required to be understood for correct playback and SEI which is not
required for correct playback (but may enhance playback).
By inspecting the SEI Information box a player will know which SEI messages that occur in the bitstream and
whether they are required for rendering.
When the coding system is AVC and the restriction is signaled with SEI messages, then the SEI messages
listed here should be stored either in the bitstream or in the AVC Configuration Record. The SEI Information
box does not contain the actual SEI messages, it only lists those that occur in the bitstream.
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ISO/IEC 14496-15:2010/Amd.1:2011(E)
5.3.17.2.2 Syntax
aligned(8) class SeiInformationBox extends Box(‘seii’) {
unsigned int(16) numRequiredSEIs;
for (i=0; i
unsigned int(16) requiredSEI_ID;
}
unsigned int(16) numNotRequiredSEIs;
for (i=0; i
unsigned int(16) notrequiredSEI_ID;
}
}
5.3.17.2.3 Semantics
requiredSEI_ID takes on the value “payloadType” of an SEI message present in the AVC stream that
is deemed necessary by the file author for correct playback.
notrequiredSEI_ID takes on the value “payloadType” of an SEI message present in the AVC stre
...
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