词条 | Universal multimedia access |
释义 |
}} The Universal Multimedia Access (UMA) addresses the delivery of multimedia resources under different and varying network conditions, diverse terminal equipment capabilities, specific user or creator preferences and needs and usage environment conditions.[1] UMA refers to the truly ubiquitous access to and consumption of multimedia content, aiming at guaranteeing unrestricted access to multimedia content:
RequirementsThe fulfilment of UMA requires that:[2]
ApproachOne feasible approach to implement UMA, is to develop context-aware systems that use the content and context descriptions to decide upon the need to adapt the content before delivering it to the end-user. The use of open ontologies and standards to structure, represent and convey those descriptions as well as to specify the kind of adaptation operations is vital for the success of UMA. This is especially true in loosely coupled environments such as the Internet, where heterogeneous end-users devices, varied content formats, repositories and networking technologies co-exist. Standards from the W3C such as OWL (Web Ontology Language) or CC/PP (Content Capability/Preferences Profile) and from ISO/IEC such as MPEG-7 and especially MPEG-21, are well-suited for the implementation of UMA-enabler systems.[3] References1. ^{{cite journal|last1=Perkis|first1=Andrew|last2=Abdeljaoued|first2=Yousri|last3=Christopoulos|first3=Charilaos|last4=Ebrahimi|first4=Touradj|last5=Chicharo|first5=Joe F.|title=Universal multimedia access from wired and wireless systems|journal=Circuits, Systems, and Signal Processing|date=May 2001|volume=20|issue=3–4|pages=387–402|doi=10.1007/BF01201409}} 2. ^{{cite journal|last1=Reiterer|first1=Bernhard|last2=Concolato|first2=Cyril|last3=Lachner|first3=Janine|last4=Le Feuvre|first4=Jean|last5=Moissinac|first5=Jean-Claude|last6=Lenzi|first6=Stefano|last7=Chessa|first7=Stefano|last8=Fernández Ferrá|first8=Enrique|last9=González Menaya|first9=Juan José|last10=Hellwagner|first10=Hermann|title=User-centric universal multimedia access in home networks|journal=The Visual Computer|date=10 June 2008|volume=24|issue=7–9|pages=837–845|doi=10.1007/s00371-008-0265-5}} 3. ^{{cite web|last1=Kasutani|first1=E|last2=Ebrahimi|first2=T|title=New Frontiers in Universal Multimedia Access|url=https://infoscience.epfl.ch/record/87058|website=École polytechnique fédérale de Lausanne|accessdate=24 February 2017|date=1 January 2004}} 1 : Telecommunication services |
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