In this paper it is observed that the test data compression environment (TDCE) parameters : compression ratio and area overhead of code based data compression techniques in statistical method like Huffman coding ,selective Huffman coding ,optimal Huffman coding ,modified selective Huffman, variable length input Huffman coding(VIHC) and split-VIHC and conclude that modified selective Huffman coding method gives higher compression ratio and low area over head.

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Compression ratio Area overhead Automatic Test Equipment system-on-a-chip Test Data Compression environment Code Based Data Compression