We first introduce the basic methods of speech processing in time domain . emphatically , we describe linear prediction and tonality detection of speech signal . moreover , we discuss the g . 726 speech waveform coding standard in details 本文首先介紹了語音波形時域分析處理的基本方法,對語音波形線性預測和音調(diào)檢測技術作了重點描述,著重研究了g . 726語音波形編碼算法,并在此基礎上,對該算法進行了某些探討改進,并用vc + +編程,在pc機平臺上予以實現(xiàn)。
In this paper , we investigate speech waveform coding technology with emphasis on the g . 726 recommendation of itu - t . based on g . 726 , we present a new algorithm . compared with g . 726 , our proposed algorithm achieves the same perceptual quality with lower bit rate 本文結(jié)合當前商用市場對語音編碼的需求,研究了語音波形編碼技術,重點研究了itu - tg . 726建議,并在此基礎上探討了進一步降低比特率的算法,使本語音編碼算法的音質(zhì)和g . 726算法的完全一樣,同時,采用本文算法的比特率低于采用g . 726語音編碼算法的比特率。