过零率(Zero Crossing Rate)是在每个音框中,音讯通过零点的次数,具有如下特性: 1.一般而言,杂讯的过零大于气音的过零率,而气音的过零率又大于有声音的过零率 2.通常在断点侦测,估测气音的起始位置和结束位置 3.可用来预估信号的基频,但很容易出错,所以必须先进行前处理 以下显示如何计算过零率 范例1输入:...
init = wl - ol; state = 0; zcr = []; for i = 1:size(yB,2) zcr = [zcr;zerocrossrate(yB(:,i),InitialState=state)]; state = yB(init,i); end Plot the audio signal and overlay the zero-crossing rate for each frame. Get figure yyaxis left x = 0:1/Fs:(numel(y)-1)/...
After careful consideration and overview of the available literature, we chose to use the following features in our platform: zero-crossing rate, pitch, bandwidth, MFCCs, spectrogram coefficients, and a variety of statistical features, namely, different complexity measures (Shannon, Tsallis, wavelet, ...
1) zero-crossing rate 过零率1. This paper firstly introduces some related concepts of speech end-point detection,and then makes end-point detection by the combination of short time average magnitude and short time average zero-crossing rate. 首先简介语音信号端点检测涉及到的几个基本概念,然后采用...
audio signal to generate a second near-end audio signal with at least some of the acoustic echo removed, wherein the echo cancellation is performed responsive to presence or absence of double-talk (DT), and wherein a zero-crossing rate (ZCR) is used to detect the presence or absence of ...
(1)过零率(Zero-crossing Rate)指在一个短时帧 内,离散采样信号值由正到负和由负到正的次数, 这个量大概能够反映信号在 … www.docin.com|基于10个网页 2. 越零率 3.4.2越零率(Zero-crossing Rate) 263.4.3差分化参数及差量化参数(Differential Coefficient and Delta Coefficient) 283.4.4 频率-... ...
These are zero crossing rate (ZCR) and energy. In here, we evaluated the results by dividing the speech sample into some segments and used the zero crossing rate and energycalculations to separate the voiced and unvoiced parts of speech. The results suggest that zero crossing rates are low ...
The result shows that:(1)under the same conditions, the zero-crossing rate of vertical and horizontal component of Wenchuan ground motion is obviously larger than that of horizontal component, which indicates that the high frequency component of vertical component is richer than that of the ...
Window("Mic to zero-crossing rate plot", layout, finalize=True) graph = _VARS["window"]["graph"] # INIT vars: CHUNK = 1024 RATE = 44100 INTERVAL = 1 TIMEOUT = 10 pAud = pyaudio.PyAudio() # FUNCTIONS: def draw_figure(canvas, figure): figure_canvas_agg = FigureCanvasTkAgg...
In this article, double threshold, iteration is applied to improve segmentation algorithm based on signal energy, and Short-time Zero-crossing Rate is proposed for the first time to determine the exact boundaries between different components of heart sound. Experimental results indicte that the ...