Stankovic, V. and Hamzaoui, R. and Xiong, Z. (2004) Efficient channel code rate selection algorithms for forward error correction of packetized multimedia bitstreams in varying channels. IEEE Transactions on Multimedia, 6 (2). pp. 240-248. ISSN 1520-9210Full text not available in this repository. (Request a copy from the Strathclyde author)
We study joint source-channel coding systems for the transmission of images over varying channels without feedback. We consider the situation where the channel statistics are unknown to the transmitter and focus on systems that enable good performance over a wide range of channel conditions. We first propose a linear-time channel code rate selection algorithm for a hybrid transmission system that combines packetization of an embedded wavelet bitstream into independently decodable packets and forward error correction with a concatenated cyclic redundancy check/rate-compatible punctured convolutional (RCPC) channel coder. We then consider an extension of this hybrid system with additional Reed-Solomon (RS) coding across the packets and give a linear-time algorithm for the efficient selection of both the RS and RCPC code rates. Experimental results for a wireline/wireless link modeled as the combination of a packet erasure channel and a Rayleigh flat-fading channel showed that our schemes significantly outperformed the best previous forward error correction systems in many situations where the actual channel parameter values deviated from the ones used in the optimization of the source-channel rate allocation.
|Keywords:||concatenated codes, convolutional codes , cyclic redundancy check codes, decoding , forward error correction, Electrical engineering. Electronics Nuclear engineering, Media Technology, Signal Processing, Computer Science Applications, Electrical and Electronic Engineering|
|Subjects:||Technology > Electrical engineering. Electronics Nuclear engineering|
|Department:||Faculty of Engineering > Electronic and Electrical Engineering|
|Depositing user:||Pure Administrator|
|Date Deposited:||29 Mar 2012 07:59|
|Last modified:||30 Sep 2016 02:14|