Distributed quality-aware multimedia communications

多媒体通信业正处于快速发展阶段，移动视频电话、网络协议电视等新业务不断涌现。此外，多媒体服务越来越多地通过异构网络传输，这会产生信号退化组合，对最终用户的感知体验质量（QoE）产生不利影响。传统上，主观测试被用来表征多媒体QoE。然而，主观测试不适合在线应用，在役质量监测需要客观模型。有了这样的客观模型，就可以系统地调整网络参数来优化速率质量性能，从而改善多媒体流传输，提高QoE。我们把这种情况称为“质量感知多媒体通信”。

The multimedia communications industry is going through a phase of rapid development and new services are emerging continuously, such as mobile video telephony and internet protocol television. Additionally, multimedia services are increasingly being transmitted through heterogeneous networks which generate signal degradation combinations that adversely affect the end-user's perceived quality of experience (QoE). Traditionally, subjective tests have been used to characterize multimedia QoE. Subjective tests, however, are not suitable for online applications and objective models are needed for in-service quality monitoring. With such objective models available, network parameters can be systematically adjusted to optimize rate-quality performance, thus improving multimedia stream delivery and enhancing QoE. We refer to this scenario as 'quality-aware multimedia communications.'