SOC测试数据的编码压缩技术

System-on-a-Chip Test-Data Coding Compression Technology

文章介绍了一种基于测试向量集的压缩/解压缩方法,目的在于弥补SOC测试中,测试设备存储容量不足的问题,分析了三种不同的编码方案,并从压缩率和解码电路的规模对它们作了比较,得出了使用Golomb编码来进行测试向量压缩/解压缩是简单而又行之有效的方法的结论。文章还给出了一个有效的最小海明距离排序算法,大大的提高了测试数据的压缩率。

We present a test-data compression/decompression scheme which is used to reduce the required memory of ATE.We analyze three kinds of encoding scheme,then make a com parison of them on the compression ratio and the complexity of the decoder,and draw a conclusion that Golomb encoding is an efficient and practicable compression/compression method.Fi nally,we present an efficient hamming distance ordering algorithm,which is proved to improve the compress gain especially.