Since the reference open source codes are written in float ansi c language , while the target processor just has the effort to cope with fixed point operation , a formal modeling method must be applied to developed a set of fixed point ansi c code , and transfer the dsp application developing procedure into a traditional way . the fixed point toolbox within matlab is adopted to play this role 鑒于目標(biāo)處理器只有定點處理能力,而ilbc算法的參考實現(xiàn)源代碼是浮點ansic代碼集??偟膶崿F(xiàn)方案采用了matlab定點工具箱作為建模的工具,通過建立了完整的算法定點模型實現(xiàn)浮點到定點的轉(zhuǎn)換,并進一步開發(fā)出了定點ansic代碼集。