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DMRC: Distortion-Minimizing Rate Control for Wireless Multimedia Sensor Networks

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Executive Summary

The availability of inexpensive CMOS cameras and microphones that can ubiquitously capture multimedia content from the environment is fostering the development of Wireless Multimedia Sensor Networks (WMSNs), i.e., distributed systems of wirelessly networked devices that can retrieve video and audio streams, still images, and scalar sensor data. WMSNs require the sensor network paradigm to be re-thought in view of the need for mechanisms to deliver multimedia content with a pre-defined level of Quality of Service (QoS). A new rate control scheme for WMSNs is introduced in this paper with a two-fold objective: maximize the video quality of each individual video stream; maintain fairness in video quality between different video streams.

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