Efficient Test-Data Compression for IP Cores Using Multilevel Huffman Coding

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Provided by: edaa
Topic: Hardware
Format: PDF
In this paper, the authors introduce a new test-data compression method for IP cores with unknown structure. The proposed method encodes the test data provided by the core vendor using a new, very effective compression scheme based on multilevel Huffman coding. Specifically, three different kinds of information are compressed using the same Huffman code, and thus significant test data reductions are achieved. A simple architecture is proposed for decoding on-chip the compressed data. Its hardware overhead is very low and comparable to that of the most efficient methods in the literature.
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