Date Added: Oct 2009
The authors present SoftCast, a new approach for wireless video that flips the conventional design; instead of requiring the source to pick an 802.11 bitrate and video resolution before transmission, it allows the receiver to decode a video whose bitrate and resolution are commensurate with the observed channel quality after reception. This approach has applications for multicast and mobile wireless receivers, whose channels differ across time and space. Wireless video is becoming increasingly important, driven by user demand for mobile TV, media sharing, and the broadcast of sporting events, lectures, and promotional clips, in universities, malls, and hotspots. These applications however present a significant challenge to conventional wireless design. Consider, for example, streaming mobile TV to users in a university campus.