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中文摘要：
文章提出了一种混合定变长虚拟块游程编码的测试数据压缩方案，该方案将测试向量级联后分块，首先在块内找一位或最大一位表示，再对块内不能一位表示的剩下位进行游程编码，这样减少了游程编码的数据量，从而突破了传统游程编码方法受原始测试数据量的限制．对ISCAS89部分标准电路的实验结果显示，本文提出的方案在压缩效率明显优于类似的压缩方法，如Golomb码、FDR码、VII-IC码、v9C码等．
英文摘要：
A test data compression scheme based on mixed fixed and variable run-length coding in virtual block（MFVR- CVB）is presented. In the scheme the test vectors are concatenated to a stream first and then this stream is divided fixed length block.In every block the one-bit-representation or the maximum one-bit-representation is search to reduce the number and length of runs. Then the left data in every block is encoded by using the run-length encoding. This reduces the volume of data needed to be encoded and breaks the limitation by the volume of original test data in tranditional run-length schemes. Experimental results show that the proposed scheme obviously outperforms the traditional coding methods in the compression ratio, such as Golomb,FDR, VIHC, v9C coding.
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