NDLI: Modeling of layered video for low-bit-rate video conferencing applications

Content Provider	IEEE Xplore Digital Library
Author	Parker Jr., R.E. Tummala, M.
Copyright Year	1999
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Naval Postgraduate Sch., Monterey, CA, USA (Parker, R.E., Jr.)
Abstract	Heterogeneous wireless networks present several challenges for real-time video applications. Traditional video codecs are not particularly robust and perform poorly when faced with packet losses from congestion and bit errors within the channel. A combination of deterministic traffic smoothing and layered video coding techniques improves error resilience. Smoothing over single frame intervals improves statistical multiplexing gains. To mitigate a portion of the delay introduced by smoothing, we propose a predictive smoother using the RLS algorithm that reduces the delay due to encoding. Layered video coding transmits video in scalable layers of increasing quality. We present a simple hybrid wavelet/DCT layered coder along with an associated optimized layered video traffic model. The traffic model employs a simplified multistate Markov chain representing a nonuniformly quantized pseudo-histogram of observed bit-rates for each layer. The model captures the effect of deterministic smoothing and aids in evaluating scheduling algorithms as well as providing a simple call acceptance scheme.
Starting Page	267
Ending Page	270
File Size	453420
Page Count	4
File Format	PDF
ISBN	0780354710
DOI	10.1109/ISCAS.1999.779993
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-05-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Videoconference Smoothing methods Traffic control Video coding Delay Wireless networks Video codecs Robustness Telecommunication traffic Resilience
Content Type	Text
Resource Type	Article

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