Context-aware adaptation of SVC scalability structure for improved coding efficiency
Hemantha Kodikara Arachchi, Chaminda T. E. R. Hewage, Safak Dogan, Marta Mrak, V. Barbosa, Maria Teresa Andrade, Ahmet M. KONDOZ · 2008
Abstract – The explosion of interest in consuming rich multimedia content resulted in a growing demand for technologies that enable seamless access over any network using any terminal without affecting the viewing ex-perience. Scalable Video Coding (SVC) is considered to be one of the key technologies that will improve the ac-cessibility to video resources through adapting them at network nodes or destination node at a negligible com-putational cost. State-of-the-art video coding technologies enable a comprehensive set of scalability options. However, the trade-off of having such enriched set of scalability options is the reduced compression efficiency and increased encoder/decoder complexity. This trade-off can be mitigated if the encoder has prior knowledge of the scalability options and levels that are actually needed at a given time. It is possible to achieve this goal in a closely monitored system, such as a Virtual Collaboration System (VCS), in which users and their usage envi-ronment are known. This paper proposes a framework to determine the scalability options and levels for encod-ing scalable video for a VCS. Simulation results highlight the benefits of the proposed framework.