© 2003 by British Computer Society
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Parallel Huffman Decoding with Applications to JPEG Files
1 Department of Computer Science, Bar Ilan University, Ramat Gan 52900, Israel Email: tomi@cs.biu.ac.il, wiseman@cs.biu.ac.il 2 Computer Science Department, Jerusalem College of Technology, Jerusalem 91160, Israel
A simple parallel algorithm for decoding a Huffman encoded file is presented, exploiting the tendency of Huffman codes to resynchronize quickly, i.e. recovering after possible decoding errors, in most cases. The average number of bits that have to be processed until synchronization is analyzed and shows good agreement with empirical data. As Huffman coding is also a part of the JPEG image compression standard, the suggested algorithm is then adapted to the parallel decoding of JPEG files.
* This is an extended version of a paper that appeared earlier in Klein, S. T. and Wiseman, Y. (2000) Proc. Data Compression Conf. DCC'00, Snowbird, Utah, pp. 383392. IEEE Computer Society Press, Los Alamitos, CA.