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Adaptive EFDR Coding Method for Test Data Compression |
Kuang Ji-shun Zhou Ying-bo Cai Shuo |
(College of Information Science & Engineering, Hunan University, Changsha 410082, China) |
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Abstract An adaptive Extended Frequency-Directed Run-length (EFDR) code method for test data compression is presented in this paper. The method is based on EFDR code, and adds an additional parameter N, which is used to represent the code length difference between tail and prefix. According to the distribution of the runs in each test vector of the test set, the method selects the most suitable N values to code, and it can improve the compression ratio. For the decompression, according to the size of the codeword, the run length of the original test data can be obtained with a simple mathematical operation. Meanwhile, those codeword under different parameter values can be decoded by the same decompression circuit. Thus, the decompression circuit can keep in a low hardware cost level. The experimental result shows that the average compression rate of the proposed method can achieve to 69.87%, over 4.07% than original EFDR code method.
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Received: 02 February 2015
Published: 06 July 2015
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Fund: The National Natural Science Foundation of China (61472123, 60673085) |
Corresponding Authors:
Zhou Ying-bo
E-mail: zhoubobo@163.com
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