cepstrum 中文意思是什麼

This thesis tries to update the cmdsr system to achieve the characters below : real - time, better robust, higher recognition rate, non - special - man. considering the disadvantages of traditional improved spectrum subtraction speech enhancement, this thesis proposes the theory of fuzzy spectrum subtraction based on the fuzzy theory and improved spectrum subtraction speech enhancement ; as for the difficulties of detecting the endpoint of speech signal, the thesis gives the table of initial and the improved parameters, with which we can confirm the endpoints of mandarin digit speech ; the thesis puts forward two - level digit real - time speech recognition system, the first level is based on discrete hidden markov model which is linear predictive coding cepstrum ( lpcc ) and difference linear predictive coding cepstrum ( dlpcc ), the second level is based on formant parameters ; as for the realization of hardware, the thesis depicts the realization of every part of cmdsr based on the tms320vc5402 in detail ; as for the development of software, the thesis gives the software design flow chart of cmdsr, simulates the basic theory with matlab language and gives the simulation results

針對傳統的「改進譜相減法語音增強」參數設定單一、環境適應能力差的缺點，提出了一種利用模糊理論和「改進的譜相減法」結合的「模糊譜相減法語音增強」 ;針對語音信號端點檢測困難的特點，通過matlab模擬試驗，給出了能夠準確確定數碼語音端點的初始和改進參數表;提出了利用基於線性預測編碼倒譜參數和差分線性預測編碼倒譜參數相結合的離散隱含馬爾可夫模型進行第一級識別、利用共振峰參數進行第二級識別的兩級漢語數碼語音識別系統，在保證系統實時性的同時，實現連接漢語數碼語音識別系統識別率的提高;在硬體實現上，詳細闡述了基於tms320vc5402的連接漢語數碼語音識別系統各部分硬體設計;在軟體開發上，給出了連接漢語數碼語音識別的軟體設計各部分的流程圖，並對各部分進行了matlab模擬，並給出了模擬結果。

Utilize cepstrum and diagnose the early fault of the hydraulic pump

利用倒頻譜診斷液壓泵早期故障

One - sided autocorrelation sequence ; linear predictive coding ; cepstrum ; dynamic time warping

單邊自相關序列線性預測編碼倒譜動態時間規正

Linear predictive coding ; lpc prediction error ; cepstrum ; dynamic time warping

線性預測編碼lpc lpcpe線性預測誤差倒譜動態時軸彎曲或動態時間規正dtw

The signal process function of the software include these function : digital filter, windowing, auto - correlation function and cross - correlation function, mean and variance, probability density function and probability distribution function statistic ; auto - power spectrum, cross - power spectrum, frequency response function, coherence function, cepstrum analysis based on fft ( fast fourier transfer ) ; joint time - frequency analysis based on stft ( short - time fourier transfer )

軟體的處理功能包括：數字濾波、時域加窗、自相關與互相關處理、均值和方差計算、概率密度和概率分佈函數計算；在快速傅立葉變換（ fft ）基礎上計算自功率譜、互功率譜、頻率響應函數、相干函數、倒頻譜分析；基於短時傅立葉變換（ stft ）的聯合時頻分析等。

3. the frequency differences are determined by both the power spectral density ( psd ) and cepstrum of ambient vibration measurements. a matlab - based toolbox is developed, in which the differences of the higher adjacent frequencies can be easily evaluated

3 .使用功率譜頻差法和倒頻譜頻差法，開發了基於matlab平臺的斜拉索環境振動基頻識別gui工具箱。

The second approach used for traitor tracing, combines cepstrum features with spread spectrum theory. no original image but the key is required for watermarking extraction

第二種演算法可用於非法源跟蹤，它將倒譜特性與擴頻通信理論相結合，水印提取時只需要密鑰而不需要原始圖像。

In the thesis, we select the mel - frequency cepstrum coefficients based on analyzing a lot of parameters of speech signal. mel cepstrum is of better recognition and anti - noise capability. ( 2 ) dynamic time warping, vector quantization, hidden markov model and artificial neural network can be used in speaker recognition

（ 2 ）現有的說話人識別方法有動態時間規整法、矢量量化法、隱馬爾可夫模型和神經網路法等，其中hmm已成為目前最佳的說話人識別處理模型。

Linear prediction code and mel - scale cepstrum coefficients are effective method in speech feature extraction and important in speech signal processing

線性預測分析和mel倒譜分析是對語音信號特徵提取比較有效的兩種方法，在語音信號處理中有著重要的應用。

Ultrasonic backscattering microstructure feature of tissue s scatterer based on chirp - z transform cepstrum

變換頻譜細化倒譜分析生物軟組織散射微結構特徵

Based on high - dimension space geometry, every speech sample is looked as a point in space. then the speech sample point is extracted feature by lpc, mel - scaled cepstrum analysis or auto correlation - angle. their feature is looked as a point too

基於高維空間幾何的思想，把每個樣本點和其特徵值看作高維空間中的一個點，用線性預測分析、 mel倒譜分析和自相關夾角法對樣本點提取特徵，然後用點在空間的投影來判別語音和非語音，根據判別結果來比較三種特徵提取方法的優劣。

An audio digital watermarking algorithm based on wavelet transform and cepstrum transform

基於小波和復倒譜變換的音頻水印技術

There are less solutions of cepstrum transform algorithm of the digital audio watermarking

基於倒譜變換的音頻水印演算法研究極少。

Analysis of ultrasonic backscattering microstructure feature of human spleen based on wd cepstrum

法分析人體脾組織的超聲散射微結構特徵

Analysis of ultrasonic back - scattering microstructures feature of human kidney based on wd cepstrum

倒譜法分析人體腎組織的超聲散射微結構特徵

Analysis of ultrasonic backscattering microstructural feature of human kidney based on wavelets transform and wd cepstrum

法的腎組織超聲散射微結構特徵分析

It consists of three parts : accurately controlled signal source, time signal stacker and " sompi " cepstrum method

它包括三部分：精密可控震源、信號疊加器和「存否」倒譜方法。

The theory of lpc and mel - scaled cepstrum analysis is introduced in this dissertation and how to extract lpcc and mfcc is elaborated

詳細介紹了線性預測分析（ lpc ）和mel倒譜分析的原理及其具體實現過程。

The shortcoming of spectral detection is its complexity and in need of long time to compute. a simple and powerful approach is cepstrum detection method, which can estimate pn sequence ’ s time period. using this parameter and the pn chip rate estimated by spectral correlation method, we can get another parameter, length of the pn sequence

另外，本文還嘗試利用cdma信號的相位重復特性，解決各用戶pn序列的分離問題;但這種方法只能在有一定先驗知識的條件下，對包含較少用戶的ds / cdma信號有較好效果，能夠簡單快速的實現用戶pn序列的分離與估計。

Generally analyses vibration signals of gearcase in some roiling mill by using various spectrum analytical methods ( such as zoom apectrum and cepstrum ), and finds out that source of exceptional vibration is owing to imbalance of the whole gearing. through assembly adjusting and carrying out dynamic balance test finally solves problems of production practice and ensure that the product line is put into production on schedule

摘要利用各種頻譜分析手段（細化功率譜和倒頻譜）對某軋鋼廠齒輪箱振動信號進行了全面分析，發現整個傳動裝置產生的不平衡導致齒輪箱振動異常，經過裝配調整，並做了動平衡試驗，有效地解決了這一問題。