Affiliations: Department of CSEE, University of Essex, Essex, UK
Note: [] Corresponding author: Martin Fleury, Department of CSEE,
University of Essex, Wivenhoe Park, Colchester CO4 3SQ, Essex, UK. Tel.: +44
1206 872684; Fax: +44 1206 872900; E-mail: fleum@essex.ac.uk
Abstract: This paper examines the threat to video streaming from slow and fast
fading, traffic congestion, and channel packet drops. The proposed response is
a combination of: rateless channel coding, which is adaptively applied;
data-partitioned source coding to exploit prioritized packetization; and
duplicate slice provision, which is the focus of the evaluation in this paper.
The paper also considers the distribution of intra-refresh macroblocks as a
means of avoiding sudden data rate increases. When error bursts occur, this
paper shows that duplicate slices are certainly necessary but this provision is
more effective for medium quality video than it is for high quality video. The
percentage of intra-refresh macroblocks can be low and still reduce the impact
of temporal error propagation.
