Delay-aware interleaving and forward-error correction for video over wireless:: a bluetooth case study

Authors:
Rouzbeh Razavi;Martin Fleury;Mohammed Ghanbari;Mahta Sadeghzadeh
Affiliations:
University of Essex, Colchester, United Kngdm;University of Essex, Colchester, United Kngdm;University of Essex, Colchester, United Kngdm;UCLA, Los Angeles, USA
Venue:
Proceedings of the 3rd ACM workshop on Wireless multimedia networking and performance modeling
Year:
2007

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Abstract

Packet-level interleaving combined with FEC has tended to be disregarded for video streaming over wireless, because of the delay introduced by the need to assemble the interleaved packets. However, packet level interleaving has the ability to cope with lengthy bursts of error on a wireless channel. This paper proposes adapting the degree of packet interleaving according to: the display deadlines of packets; transmit buffer occupation; and anticipated video input to the wireless channel. Conservative adaptation is applied to avoid missed deadlines and the picture type importance is taken into account. A detailed Bluetooth case study illustrates the value of the techniques and as a by-product the paper corrects some erroneous results of others for Bluetooth version 2's Enhanced Data Rate.