Our wireless H.264 video testbed serves as a real world platform for experimenting ideas and verifying algorithms in the research area of video communications over wireless.
GNU
Radio is a free software for building and deploying Software Defined
Radios (SDR). SDR turns radio hardware problems into software problems.
With GNU radio, it is possible to change transmission power and
waveforms on the fly. The flexibility facilities the cross-layer design
of multimedia over wireless systems.
FFmpeg is a complete open source solution to record, convert and stream audio and video. Combined with x264, the free library for encoding H264/AVC video streams, we are able to perform real time H.264 encoding and decoding.
Using GNU Radio and FFmpeg as the backbone of our
wireless video testbed, we are able to explore numerous interesting
topics in the area of video over wireless, such as adaptive error
resilient video coding, adaptive power control and modulation, and
cross-layer optimization of wireless multimedia, etc. And more
important, instead of soly relying on simulations, we interact with the
real world wireless environment, which is both interesting and
challenging!
