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CSA CAN/CSA-ISO/IEC 14496-20-09 AMD 3
Information technology — Coding of audio-visual objects — Part 20: Lightweight Application Scene Representation (LASeR) and Simple Aggregation Format (SAF) — AMENDMENT 3: Presentation and Modification of Structured Information (PMSI)
| contributor author | CSA - CSA Group | |
| date accessioned | 2017-09-04T18:19:01Z | |
| date available | 2017-09-04T18:19:01Z | |
| date copyright | 2012.03.01 | |
| date issued | 2012 | |
| identifier other | HSXPUEAAAAAAAAAA.pdf | |
| identifier uri | http://mapnamagz.yabesh.ir/std/handle/yse/201705 | |
| description abstract | This part of ISO/IEC 14496 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, — signalling 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. This part of ISO/IEC 14496 defines the usage of SAF for LASeR content; however, LASeR can be used independently from SAF. | |
| language | English | |
| title | CSA CAN/CSA-ISO/IEC 14496-20-09 AMD 3 | num |
| title | Information technology — Coding of audio-visual objects — Part 20: Lightweight Application Scene Representation (LASeR) and Simple Aggregation Format (SAF) — AMENDMENT 3: Presentation and Modification of Structured Information (PMSI) | en |
| type | standard | |
| page | 16 | |
| status | Active | |
| tree | CSA - CSA Group:;2012 | |
| contenttype | fulltext |
