Energy efficiency and the role of quality metrics in wireless video communications.
- Resource Type
- Theses
- Authors
- Eisenberg, Yiftach
- Source
- Dissertation Abstracts International; Dissertation Abstract International; 65-05B.
- Subject
- Engineering, Electronics and Electrical
- Language
- English
Summary: The other primary focus of this dissertation is on methods for evaluating video quality. In packet-based communication systems, both compression artifacts and packet losses deteriorate the quality of the received signal. Traditional approaches have primarily focused on minimizing the expected value of the end-to-end distortion. We show that this type of approach may lead to undesirable perceptual artifacts. A new "variance-aware" resource allocation technique is proposed that is capable of reducing large variations in quality. Experimental results demonstrate that variance-aware resource allocation helps limit the propagation of perceptually annoying artifacts and is more robust to channel-mismatch. The concepts developed here can be utilized in a wide range of applications including error resilient encoding algorithms, and various source-network adaptation schemes.