本論文主要研究內容是針對將MPEG-4低率語音解碼器實現在系統晶片上。首先，由於MPEG-4低率語音解碼器是浮點程式，所以需要將MPEG-4低率語音解碼器定點化，此外並針對MPEG-4低率語音解碼器中計算量較大的部分，簡化其計算量，使MPEG-4低率語音解碼器能有較好的效能，並使MPEG-4低率語音解碼器能夠在系統晶片上即時解碼。

　　The research of this thesis focuses on the implementation of low rate MPEG-4 speech real-time decoder (HVXC decoder) on SoC platform. At first, the HVXC decoder is a float-point program, so we have to make a float-point to fixed-point conversion of HVXC decoder. Besides, we find out some parts of HVXC decoder that take lots of calculation and try to speed up those parts in order to make the HVXC decoder be able to real-time decode on the SoC platform.

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