Jacob Chakareski and Philip A. Chou
This paper addresses the problem of streaming packetizedfl media over a lossy packet network to a wireless client, infl a rate-distortion optimized way. We introduce an incrementalfl redundancy error-correction scheme that combats the effects offl both packet loss and bit errors in an end-to-end fashion, withoutfl support from the underlying network or from an intermediatefl base station. The scheme is employed within an optimizationfl framework that enables the sender to compute which packetsfl it should send, out of all the packets it could send at a givenfl transmission opportunity, in order to meet an average transmission-fl rate constraint while minimizing the average end-to-endfl distortion. Experimental results show that our system is robustfl and maintains quality of service over a wide range of channelfl conditions. Up to 8 dB performance gains are registered overfl systems that are not rate-distortion optimized, at bit-error ratesfl as large as 10-2.
|Published in||IEEE Trans. Communications|
|Publisher||Institute of Electrical and Electronics Engineers, Inc.|
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