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A Parallel Decoder for Lossless Image Compression by Block Matching

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2 Author(s)
Luigi Cinque ; La Sapienza U., Via Salaria 113, 00198 Roma, Italy ; Sergio De Agostino

A work-optimal O(lognlogM) time PRAM-EREW algorithm for lossless image compression by block matching was shown in L. Cinque et al., (2003), where n is the size of the image and M is the maximum size of the match. The design of a parallel decoder was left as an open problem. By slightly modifying the parallel encoder, in this paper we show how to implement the decoder in O(lognlogM) time with O(n/logn) processors on the PRAM-EREW. With the realistic assumption that the size of the compressed image is O(n1/2), the parallel decoder requires O(log2n) time and O(n/logn) processors on the mesh of trees

Published in:

Data Compression Conference, 2007. DCC '07

Date of Conference:

27-29 March 2007