On statistical multiplexing of variable-bit-rate video streams in mobile systems
MM '09 Proceedings of the 17th ACM international conference on Multimedia
Statistical multiplexing of variable-bit-rate videos streamed to mobile devices
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
Design and evaluation of a testbed for mobile TV networks
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
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We present a complete, running, testbed for mobile TV networks that employ the Digital Video Broadcast - Handheld (DVB-H) open standard. DVB-H based networks have been deployed in several countries around the world and currently being pilot-tested in many others. Nevertheless, there exists no open-source testbed in the literature to enable researchers to analyze and optimize the performance of such networks; most testbeds are proprietary. Our testbed implements the complete stack of the DVB-H standard and it streams real videos to actual handheld devices. It integrates several off-the-shelf hardware components and devices with software components. Some of the software components are developed by us and others are leveraged (after bug fixes and modifications) from open-source projects. In addition, we present several experiments to: (i) evaluate and compare multiple energy-saving techniques recently proposed for mobile TV networks, and (ii) demonstrate a new method to reduce the channel switching delay.