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Optimal Selective Huffman Coding for Test-Data Compression
August 2007 (vol. 56 no. 8)
pp. 1146-1152
Selective Huffman coding has been recently proposed for efficient test-data compression with low hardware overhead. In this paper we show that the already proposed encoding scheme is not optimal and we present a new one, proving that it is optimal. Moreover, we compare the two encodings theoretically and we derive a set of conditions which show that, in practical cases, the proposed encoding offers always better compression. In terms of hardware overhead, the new scheme is at least as low-demanding as the old one. The increased compression efficiency, the resulting test-time savings, and the low hardware overhead of the proposed method are also verified experimentally.
Index Terms:
Embedded Testing Techniques, IP Cores, Selective Huffman Coding, Test-Data Compression
Xrysovalantis Kavousianos, Emmanouil Kalligeros, Dimitris Nikolos, "Optimal Selective Huffman Coding for Test-Data Compression," IEEE Transactions on Computers, vol. 56, no. 8, pp. 1146-1152, Aug. 2007, doi:10.1109/TC.2007.1057
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