speech detector 中文意思是什麼
speech detector
解釋
語音檢波器-
Section ii describes the design approach and implementation of speech module on mcf5249 coldfire core. the speech codec optimizes g. 729a codes and added voice activity detection of g. 729b to save bandwidth ; the implementation of acoustic echo cancellation uses nlms algorithm and it can reduce echo though designing adaptive fir filter and speech detector ; the dtmf and cpt generate signal using two second order digital sinusoidal oscillators and detect signal by picking up the frequency information. but only get the frequency information is not enough in cpt detector, this thesis introduces a method
其中對語音編解碼器的設計採用優化g . 729a代碼達到設計要求，並在此基礎上加入g . 729b的靜音檢測模塊，以進一步降低網路傳輸帶寬;對回聲消除器的設計採用nlms演算法，通過設計自適應fir濾波器和語音檢測器達到回聲消除目的;對雙音多頻設計，信號發生端採用構造靜態參數表並通過二階正弦振蕩器產生信號，信號檢測端提取頻率信息以檢測信號;對呼叫進程音設計，除了類似雙音多頻的信號發生及頻率檢測設計外，還需要檢測信號持續時間，作者設計了一種基於匹配狀態表的方法以檢測信號持續時間。 -
According to the project of adaptive multi - rate speech coding ( amr ) being put forward by the third generation group of the mobile communication, this paper takes the principle of the speech arithmetic as the base, studies the technologies including the source controlled rate, voice activity detector, comfort noise and the error concealment unit in amr, discusses its the characteristic of adaptation and analyses its performances particularly. amr c codes are researched carefully through the modules being divided into and debugged under the tms320c54x provided by the ti corporation, and optimized in selecting the method of c code embedded assembler codes and simplified in the search codebook combining with the theory of speech coding, which are based on the realization about theory and practice of the optimization of amr speech coding
從自適應多碼率語音編碼演算法的c代碼出發，對它進行模塊劃分後作了系統分析，將其在vc下調試通過，進一步在ti公司提供的tms320c54x環境中進行調試，結合語音編碼理論，對演算法進行優化，採用了在c代碼中嵌入匯編和簡化自適應碼本和固定碼本搜索的方法，部分地提高了c代碼效率，為實現自適應多碼率語音編碼的優化奠定了理論和實踐基礎。 -
Speech activity detector sad
話音活動檢測器 -
Many methods of pitch detection are developed so far, in this thesis the pitch detector using waveform transform is adopted. according to the problem appearing in pitch extraction experiment, a novel algorithm of pitch detection is presented. the pitch points in speech signal exhibit local maximum across several consecutive dyadic scales, and their positions are similar, so the improved approach selects pitch points by vote strategy, not by traditional method
基頻提取的方法很多，本文採用了小波變換方法，該方法對部分語音得到了較好的結果，但對大部分語音提取的基頻中含有較多錯誤，經仔細分析和研究，本文對它進行了改進，提出了一種基於小波變換的語音基頻檢測新演算法。 -
European digital cellular telecommunications system - half rate speech - part 6 : voice activity detector for half rate speech traffic channels ; english version ets 300581 - 6 : 1995
歐洲數字移動電話遠程通信系統.半價話務.第6部分:半
分享友人