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MPEG-21 DIA-based Video Adaptation Framework and its Application to Rate Adaptation

机译:基于MPEG-21 DIA的视频自适应框架及其在速率自适应中的应用

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摘要

In universal media access (UMA) environment, because of the heterogeneous networks and terminals, flexible video adaptation, that is performed according to the network conditions and terminal capabilities as well as user preferences, is required to maximize consumer experience and ensure Quality of Service (QoS). MPEG-21 Digital Item Adaptation (DIA) support an interoperable framework for effective and efficient video adaptation. Among MPEG-21 DIA tools, utility function that describes the relations among the feasible adaptation operation, resource constraint, and utility plays the most important role in adaptation process because the optimal adaptation operation is decided among the feasible adaptation operations with given constraints. Therefore, in this paper, the overall concept of MEPG-21 DIA based adaptation framework and formulation of utility function are presented. In addition, the feasibility of the adaptation framework is presented by applying it to a few use cases for generating utility function and applications to specific adaptation scenarios involving nonscalable and scalable video.
机译:在通用媒体访问(UMA)环境中,由于网络和终端的异构性,需要根据网络条件和终端功能以及用户偏好进行灵活的视频适配,以最大限度地提高消费者体验并确保服务质量( QoS)。 MPEG-21数字项目适配(DIA)支持有效和高效的视频适配的互操作框架。在MPEG-21 DIA工具中,描述可行的适应性操作,资源约束和效用之间关系的效用函数在适应过程中起着最重要的作用,因为最优适应性操作是在给定约束条件下在可行的适应性操作中决定的。因此,本文提出了基于MEPG-21 DIA的自适应框架的总体概念和效用函数的表述。另外,通过将适应框架应用于少数几个用例,以生成实用功能和应用到涉及不可缩放和可缩放视频的特定适应场景,从而提出了适应框架的可行性。

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