An 8kbit / s speech coding system is realized based on cs - acelp . this system is simulated by using vc + + 6 . 0 in windows2000 . it is composed of encoder and decoder 本文以cs - acelp語(yǔ)音壓縮編碼算法為基礎(chǔ),在充分掌握算法理論和實(shí)現(xiàn)方法的基礎(chǔ)上,設(shè)計(jì)了速率為8kbit / s的語(yǔ)音壓縮編碼和解碼系統(tǒng),并用vc + + 6 . 0在windows2000環(huán)境下進(jìn)行了軟件模擬。
By reducing coding rate , more speech signals can be transferred in the same channel . so , low bit rate speech coding has especially important significance when the transmission rate is limited very strictly 通過(guò)降低編碼速率,可以使同樣的信道容量能夠傳輸更多路的語(yǔ)音信號(hào),在傳輸比特限制十分嚴(yán)格的場(chǎng)合,低速率語(yǔ)音編碼具有特別重要的意義。
4 . aimed at the reduction of bit rate and the improvement of speech quality , a serial of speech coding schemes are studied in a gradual refinement way , and an integrated coding scheme at 1 . 5 - 2 . 4kbps is presented finally 圍繞編碼位率的降低和語(yǔ)音質(zhì)量的提高,以逐步求精層層遞進(jìn)的方式研究了一系列壓縮編碼方案,并最終提出一個(gè)位率在1 . 5 2 . 4kbps的綜合編碼方案。
G . 729a is the reduced - complexity version of 8kbit / s speech coding algorithm g . 729 standardized by sg15 of itu - t . the algorithm structure of g . 729a is the same as that of g . 729 and the bitstream of g . 729a is interoperable with that of g . 729 G . 729a是8kbit / s語(yǔ)音編碼標(biāo)準(zhǔn)g . 729減少?gòu)?fù)雜度的版本,其編解碼算法結(jié)構(gòu)與g . 729的編解碼算法結(jié)構(gòu)一樣,其比特流與g . 729的比特流可互操作。
Telecommunication technology changes with each passing day , and it continually put forward new demands on speech coding . during the past 20 years , several standards of speech coding have been specified . such achievements surpass the work done two decades ago 語(yǔ)音通信技術(shù)日新月異的發(fā)展,對(duì)語(yǔ)音編碼不斷提出新的要求,在過(guò)去20年中,產(chǎn)生了許多語(yǔ)音編碼標(biāo)準(zhǔn),超過(guò)了以往許多年的工作。
Speech communication is one of the most used modes in the digital trunking communication system . excellent algorithm of speech coding can save the bandwidth resource , improve the utilization of frequency , so it has important value for investigation 語(yǔ)音通信是數(shù)字集群通信系統(tǒng)中最常用的通信方式之一,優(yōu)良的語(yǔ)音編解碼算法能夠更加有效地節(jié)省帶寬資源,提高頻率利用率,因此具有重要的研究?jī)r(jià)值。
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.