SoC test data compression and decompression with improved FDR code
改进型FDR码对SoC测试数据的压缩及解压缩*

To reduce the volume of SoC test data, an improved FDR code was proposed, called IFDR code. Unlike FDR code, it encoded both runs of 0s and 1s with same codes, considering test sequences as distributions of 0 string and 1 string. Due to its simple architecture, the decompression circuit for IFDR code needed very little additional hardware. Experimental results for the ISCAS 89 benchmark circuits show that IFDR code outperforms FDR code and other similar codes in achieving higher compression ratio.