The optical and mechanical structure and principles of photoelectrical angle encoder areintroduced, furthermore, the design of code disk and the function of every code track are pre-sented.
本文介绍了光电轴角编码器光学、机械结构及原理； 码盘设计及各码道功能；
On the basis of the performance testing of our real-time codec is optimum algorithm introduced into pre-processing of the speech encoder of TETRA.
在对实现的TETRA语音编解码算法进行性能测试、分析的基础上，文章提出了在TETRA语音编码的预处理部分采用优化算法。
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