QoE assessment for SVC streaming in ENVISION
This work addresses video streaming quality for users in multimedia services, but it is incremental as it builds on prior research within the ENVISION project.
The paper studied the impact of a previously proposed playout smoothing mechanism on user-perceived video quality for scalable video coding under varying network conditions, finding that smoothed video clips achieved higher Mean Opinion Scores across different network configurations.
Scalable video coding has drawn great interest in content delivery in many multimedia services thanks to its capability to handle terminal heterogeneity and network conditions variation. In our previous work, and under the umbrella of ENVISION, we have proposed a playout smoothing mechanism to ensure the uniform delivery of the layered stream, by reducing the quality changes that the stream undergoes when adapting to changing network conditions. In this paper we study the resulting video quality, from the final user perception under different network conditions of loss and delays. For that we have adopted the Double Stimulus Impairment Scale (DSIS) method. The results show that the Mean Opinion Score for the smoothed video clips was higher under different network configuration. This confirms the effectiveness of the proposed smoothing mechanism.