AMR Coding Optimization Method Based on the ZSP500 Paltform
Zhu Xiao-kang · Dianzi qijian · 2008
Although most of DSP processors support C language at present,at the practical project,and we often compile flow control and building project frame by C language,the arithmetic module and relatively time-consuming function module are compiled by assemble language.We use assemble language to compile and optimize complicated arithmetic and function module,that it will get twice the result with half the effort. Since the AMR are based on the ACELP coding algorithm and the ACELP requires huge complexity in the codebook search, we especially focused on the optimization of the codebook search routine in our implementations.We make the best use of the hard resource and condensed instruction of ZSP500 to achieve the needed object.