In order to deliver video streams efficiently over WiFi to many thousands of consumer handheld devices, broadcast protocols must be employed. In this mode of operation the received video quality can deteriorate rapidly as a result of high application layer packet loss which occurs because MAC frame retransmission cannot be used. In this paper we develop a robust video solution that is used in conjunction with broadcast transmission over 802.11a/g. Using a cross-layer WiFi simulator in combination with an accurate time-correlated fading channel, the received video quality is evaluated for broadcast H.264 video sequences. Application layer cross-packet forward error correction is then used together with error concealment at the video client. The methods developed can be used to successfully broadcast video to many thousands of handheld terminals at large-scale spectator events.
|Translated title of the contribution||Robust video broadcasting over 802.11a/g in time-correlated fading channels|
|Title of host publication||International Conference on Consumer Electronics (ICCE), Las Vegas|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|Pages||1 - 2|
|Number of pages||2|
|Publication status||Published - Jan 2009|
|Event||International Conference on Consumer Electronics (ICCE) - Las Vegas, United States|
Duration: 1 Jan 2009 → …
|Conference||International Conference on Consumer Electronics (ICCE)|
|Period||1/01/09 → …|
Bibliographical noteRose publication type: Conference contribution
Additional information: With accompanying conference presentation
Sponsorship: This work was supported in part by the UK
Technology Strategy Board.
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- IEEE 802.11a/g
- forward error correction