matlab自相关函数提取语音信号基频

Use the autocorrelation function on segments of the signal (windowsize: 100ms) and compute the fundamental frequency. Use a max_time_lag of 100ms in the autocorrelation function and a window shift of 25ms. Create a fundamental frequency vector and plot your pitch contour.

function [ output_args ] = autocorrelation（signal max_time_lag）
    %% name: Sandra Ashipala  student number: s0554648
    %% name: LinXiaokai      student number: 374826
    %We write the function just according to the formula provided in
    %question
    max_sample_lag=max_time_lag*16000; %convert time lag to samples
    N=size（signal1）;
    one_acf=0;
    acf = zeros（max_sample_lag+11）;
    for sample_lag=0:max_sample_lag    %compute acf for different lag
    for k=1+sample_lag:N               %compute acf for one lag
        one_acf=one_acf+signal（k）*signal（k-sample_lag）;
    end
        acf（sample_lag+1）=one_acf/N;   %collect result of acf
    end
    output_args=acf;
    end

 属性            大小     日期    时间   名称
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     目录        2048  2016-12-11 18:52  Programming Homework I\
     文件       90976  2013-10-01 18:46  Programming Homework I\13ZZ637A.wav
     文件         691  2016-12-11 17:57  Programming Homework I\autocorrelation.asv
     文件         716  2016-12-11 19:57  Programming Homework I\autocorrelation.m
     文件        2819  2016-12-11 19:07  Programming Homework I\prog_homework_01E1E2.asv
     文件        2272  2016-12-11 20:02  Programming Homework I\prog_homework_01E3.asv
     文件        2356  2016-12-11 20:14  Programming Homework I\prog_homework_01E3.m
     文件        3033  2016-12-11 20:22  Programming Homework I\prog_homework_01_E1E2.m
     文件        1470  2016-11-23 15:17  Programming Homework I\stpower.m
     文件        1635  2016-11-23 15:17  Programming Homework I\stzerocross.m
     文件        1583  2016-11-23 15:17  Programming Homework I\unvoivoi.m