关键词: 测试数据压缩, 编码, 连续及非连续块, 系统芯片

Abstract: A new test data compression method is proposed based on encoding the data blocks which are sequential or non-continuous.In order to improve the efficiency of the code，binary code with fixed length is used to express the length information of the sequential data block.On the other hand，the sequences which don’t have enough length is made to be non-continuous data blocks by some strategy，and not be encoded，so it can avoid the situation that short run length sequences replaced by long length code.The rule proposed by the method reduces the complexity of encoding which makes use of prefix and tail code separately，so the process of its encoding and decoding is simple，and the protocol of communication is also simple.Experimental results for ISCAS-89 benchmarks show that our new technique results in much better compression ratios than FDR code and Golomb code.

Key words: test data compression, encode, sequential and non-continuous data block, system-on-a-chip