With the booming of the third generation mobile telecommunication , the variable rate speech coding technology , which is the core of it , has been widely studied during recent years 隨著第三代移動通信系統(tǒng)的迅猛發(fā)展,作為其話音業(yè)務(wù)的核心技術(shù),變速率語音編碼技術(shù)在近年來得到了廣泛的研究。
Quadrature mirror filter banks is a project which belongs to multi - sample rate digital signal process . it has important research value for wavelet , speech code , image compress and so on 正交鏡像濾波器組是多抽率數(shù)字信號處理領(lǐng)域研究的問題。對小波分析,語音編碼,圖像壓縮等具有重要的研究價值。
In this paper , the background knowledge of speech coding , the theory and development is firstly introduced , then g . 729 standard and appendix a is analyzed systematically 本論文在介紹了低速率語音編碼技術(shù)的背景知識后,系統(tǒng)地闡述了g 729語音編碼標(biāo)準(zhǔn)及其附錄a ,著重從原理上分析了算法中的關(guān)鍵技術(shù)。
During the concretely realization of the recommendation g . 723 . 1 , we set up the hardware elements of the speech coding , which is the tms320c54xx dsp platform of ti inc . we introduced it too 在g . 723 . 1標(biāo)準(zhǔn)的實現(xiàn)過程中,基于ti公司的tms320c5402平臺,我們首先建立了語音編碼硬件基礎(chǔ),對此做了比較詳細的介紹。
In the study of speech coding in present , the mixed excitation linear prediction ( melp ) is a kind of relatively good method . the melp vocoder is the new federal standard speech coder 在現(xiàn)有的語音編碼研究中,混合激勵線性預(yù)測編碼( melp )是一種比較好的方法, melp編碼方法已經(jīng)被確定為美國新的聯(lián)邦語音編碼標(biāo)準(zhǔn)。
Recently , low bit - rate speech coding has developed greatly . the research on low bit - rate coder at 4kb / s and below with communication quality has become one of the most attention at present 近年來低速率語音編碼得到了巨大的發(fā)展,目前,在4kb / s以下速率實現(xiàn)具有通信質(zhì)量的編碼器已成為當(dāng)今語音編碼領(lǐng)域的一大研究熱點。
Among these achievements , the g . 723 . 1 algorithm , which intergrates lots of advantages of other low bit rate speech coding algorithms , can help to get high voice synthesis quality at the rate of 5 . 3kbit / s and 6 . 3kbit / s 723 . 1是最重要的成果之一,它能以5 . 3kbit s和6 . 3kbit s兩種編碼速率提供較好的合成語音質(zhì)量。
Vector quantization ( vq ) is an important technology in the field of image compression , which is widely used in various applications such as speech coding , audio and video compression , and teleconferencing systems 矢量量化( vq )是近年來圖像壓縮研究中的重要技術(shù),廣泛應(yīng)用于語音編碼、音視頻壓縮和遠程會議等系統(tǒng)中。
An 8kbit / s speech coding system is designed in the text . it is also simulated by using vc + + 6 . 0 in windows2000 . the result of simulating examination make know this system obtain good rebuilding speech coding quality 本文的重點是設(shè)計了8kbit / s語音壓縮編碼和解碼系統(tǒng),并用vc + + 6 . 0在windows2000環(huán)境下模擬實現(xiàn)了該系統(tǒng)。
Waveform interpolation speech coding is one of the most potential low - rate speech coding algorithms in recent years . with high performance , wi technique has been widely concerned 波形內(nèi)插( waveforminterpolation , wi )語音編碼是近年來發(fā)展起來的一種非常有潛力的低速率語音編碼算法,因其良好的性能,受到了研究人員的廣泛關(guān)注。
Speech coding is an application of data compression of digital audio signals containing speech. Speech coding uses speech-specific parameter estimation using audio signal processing techniques to model the speech signal, combined with generic data compression algorithms to represent the resulting modeled parameters in a compact bitstream.