In this paper a noval coding and decoding technique with high compression performance for binary document transmission is described.

由于把模式匹配的技术引进到编码过程，信息压缩率得到了很大的提高；

A noval way based on CPLD was put forward for integral detecting of the processing heterodyne interference signal with mid frequency difference.

提出了一套基于CPLD的中频差外差信号处理的整数检测方案。