The electronic version of this International Standard can be downloaded from the ISO/IEC Information Technology Task Force (ITTF) web site
Abstract
PreviewISO/IEC 14496-20:2008 defines a scene description format (LASeR) and an aggregation format (SAF) respectively suitable for representing and delivering rich-media services to resource-constrained devices such as mobile phones.
LASeR aims at fulfilling all the requirements of rich-media services at the scene description level. LASeR supports:
- an optimized set of objects inherited from SVG to describe rich-media scenes,
- a small set of key compatible extensions over SVG,
- the ability to encode and transmit a LASeR stream and then reconstruct SVG content,
- dynamic updating of the scene to achieve a reactive, smooth and continuous service,
- simple yet efficient compression to improve delivery and parsing times, as well as storage size, one of the design goals being to allow both for a direct implementation of the SDL as documented, as well as for a decoder compliant with ISO/IEC 23001-1 to decode the LASeR bitstream,
- an efficient interface with audio and visual streams with frame-accurate synchronization,
- use of any font format, including the OpenType industry standard, and
- easy conversion from other popular rich-media formats in order to leverage existing content and developer communities.
Technology selection criteria for LASeR included compression efficiency, but also code and memory footprint and performance. Other aims included: scalability, adaptability to the user context, extensibility of the format, ability to define small profiles, feasibility of a J2ME implementation, error resilience and safety of implementations.
SAF aims at fulfilling all the requirements of rich-media services at the interface between media/scene description and existing transport protocols:
- simple aggregation of any type of stream,
- signaling of MPEG and non-MPEG streams,
- optimized packet headers for bandwidth-limited networks,
- easy mapping to popular streaming formats,
- cache management capability, and
- extensibility.
SAF has been designed to complement LASeR for simple, interactive services, bringing:
- efficient and dynamic packaging to cope with high latency networks,
- media interleaving, and
- synchronization support with a very low overhead.
ISO/IEC 14496-20:2008 defines the usage of SAF for LASeR content; however, LASeR can be used independently from SAF.
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Status: PublishedPublication date: 2008-12
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Edition: 2Number of pages: 167
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Technical Committee: ISO/IEC JTC 1/SC 29 Coding of audio, picture, multimedia and hypermedia information
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- ICS :
- 35.040.40 Coding of audio, video, multimedia and hypermedia information
Buy this standard
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std 1 208 | PDF on CD |
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Life cycle
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Previously
WithdrawnISO/IEC 14496-20:2006
WithdrawnISO/IEC 14496-20:2006/Amd 1:2008
WithdrawnISO/IEC 14496-20:2006/Cor 1:2007
WithdrawnISO/IEC 14496-20:2006/Cor 2:2008
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Now
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00
Preliminary
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10
Proposal
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20
Preparatory
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30
Committee
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40
Enquiry
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50
Approval
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60
Publication
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90
Review
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95
Withdrawal
Corrigenda / Amendments
PublishedISO/IEC 14496-20:2008/Amd 1:2009
PublishedISO/IEC 14496-20:2008/Cor 1:2010
PublishedISO/IEC 14496-20:2008/Amd 2:2010
PublishedISO/IEC 14496-20:2008/Amd 3:2010
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00
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