G.729語音編碼器定點DSP的實時實現(xiàn)

介紹了G.729語音編碼器算法和定點數(shù)字信號處理芯片TMS320VC549，重點討論了低速率語音編碼器在TMS320VC549上實時實現(xiàn)過程中軟、硬件設(shè)計中的關(guān)鍵技術(shù)。采用了定點數(shù)字信號處理器芯片實時實現(xiàn)G.729語音編解碼算法，結(jié)果表明，得到了預(yù)期的8 Kb/s的低碼速率、較低的算法時延和極高的語音音質(zhì)。
關(guān) 鍵 詞 G.729語音編碼器; 數(shù)字信號處理器; 模塊化功能設(shè)計; 實時實現(xiàn)

Abstract G.729 speech codec (encoder and decoder) algorithm and the TMS320VC549 fixed-point DSP (Digital Signal Processing) chip are briefly described in this paper. We put our emphasis on the hardware and software design of the low bit rate speech codec based on TMS320VC549 chip. Also, some key techniques for the real-time implementation of the complex algorithm on fixed-point DSP (Digital Signal Processor) are discussed. The results show that the real-time implementation of G.729 speech coder on fixed-point DSP can produce 8kb/s low bit rate, lower algorithm delay and toll-quality speech.
Key words G.729 speech codec; digital signal processor; modular function design; real-time Implementation