使用重复播种和Golomb编码的二维测试数据压缩

提出了一种用于SOC测试的二维测试数据压缩方案．先利用线性反馈移位寄存器重复播种技术，对带有无关位的测试向量进行压缩，并获得种子差分序列；然后用Golomb编码的方法对其作进一步的压缩；同时给出了Golomb码参数。的确定方法和相应的二维解压结构、实验结果表明，该方案在保证较高故障覆盖率的前提下，既能显著地减少测试序列长度、缩短测试时间，又能有效降低对测试数据带宽的要求．

Two-Dimensional Test Data Compression Using Reseeding and Golomb Codes

A two-dimensional test data compression scheme for System-On-a-Chip (SOC) is proposed. By utilizing the technique of LFSR reseeding, the test patterns with unspecified bits are first compressed, and then the seed difference sequences obtained are further compressed with Golomb codes. In the meantime, determination of the Golomb code parameter m and the corresponding two-dimensional decompression architecture is also given. Experimental results show that the scheme, under the precondition of ensuring higher fault coverage,not only reduces the length of test sequences and shortens test time, but also lowers effectively the requirement for test data bandwidth.