基于ARM平台的AMR WB编码源代码，对速度进行了优化，可直接使用-ARM-based platform, AMR WB encoder code has been optimized for speed, can be used directly

1. understand how to improve CPU performance 2. master the working principle of pipelined MIPS microprocessor. 3. understand the concept of data adventure, control risk and the solution of pipeline conflict. 4. mastering the testing method of pipe