铁路行车指挥采用语音时间记录设备已极为广泛，它对行车管理起着十分重要的作用。但长期以来，语音时间记录设备使用的是磁带录音机，性能落后，使用不便。九十年代初，随着微电子技术的迅速发展，国外对数码录音技术的研究开发日趋重视。近期新一代大容量存储器的问世，尤其 Railway traffic command using voice time recording equipment has been extremely extensive, it plays a very important role in traffic management. However, for a long time, the voice time recording device uses a tape recorder with poor performance and inconvenience in use. In the early nineties, with the rapid development of microelectronic technology, foreign countries pay more and more attention to the research and development of digital recording technology. The advent of a new generation of high-capacity memory recently, in particular