{"id":54884,"date":"2025-08-13T12:29:42","date_gmt":"2025-08-13T04:29:42","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/54884.html"},"modified":"2025-08-13T12:29:42","modified_gmt":"2025-08-13T04:29:42","slug":"%e3%80%90%e5%be%ae%e5%ae%9e%e9%aa%8c%e3%80%91%e5%a6%88%e5%a6%88%e6%88%91%e7%9a%84matlab%e4%bc%9a%e8%af%86%e5%88%ab%e5%a3%b0%e9%9f%b3%e7%9a%84%e5%9f%ba%e9%a2%91%e4%ba%86%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/54884.html","title":{"rendered":"\u3010\u5fae\u5b9e\u9a8c\u3011\u5988\u5988\u6211\u7684MATLAB\u4f1a\u8bc6\u522b\u58f0\u97f3\u7684\u57fa\u9891\u4e86\uff01"},"content":{"rendered":"

\u00a0\u524d\u60c5\u63d0\u8981：<\/h3>\n

\u3010\u8d85\u8be6\u7ec6\u3011\u79d1\u666e：\u522b\u518d\u53ea\u4f1a\u7528\u81ea\u76f8\u5173！YIN \u548c PYIN \u5982\u4f55\u7834\u89e3\u97f3\u9891\u9690\u85cf\u5bc6\u7801？-CSDN\u535a\u5ba2<\/p>\n

\u4eca\u5929\u7528MATLAB\u5b9e\u73b0YIN\u7b97\u6cd5\u2014\u2014<\/p>\n

\u00a0\u5b83\u662f\u4e00\u79cd\u7ecf\u5178\u7684\u57fa\u9891（F0）\u63d0\u53d6\u7b97\u6cd5，\u901a\u8fc7\u8ba1\u7b97\u4fe1\u53f7\u7684\u81ea\u76f8\u5173\u51fd\u6570\u53ca\u5176\u7d2f\u79ef\u5747\u503c\u5f52\u4e00\u5316，\u6765\u5b9a\u4f4d\u57fa\u9891\u5468\u671f，\u9002\u7528\u4e8e\u8bed\u97f3\u3001\u4e50\u5668\u7b49\u4fe1\u53f7\u7684\u57fa\u9891\u68c0\u6d4b，\u5177\u6709\u8f83\u597d\u7684\u6297\u566a\u58f0\u6027\u80fd\u3002\u5148\u6765\u770bYIN，\u8fd9\u91cc，\u7b14\u8005\u5728Cubase\u4e2d\u5bfc\u51fa\u4e86\u7ba1\u5b50\u5439\u594f\u5355\u97f3\u7684\u97f3\u9891\u6587\u4ef6\u3002<\/p>\n

\u5e9f\u8bdd\u4e0d\u8bf4，\u4ee3\u7801\u5982\u4e0b：<\/h3>\n

clear; clc; close all;
\n[audio, Fs] = audioread('\u7ba1\u5b50.wav'); % \u66ff\u6362\u4e3a\u4f60\u7684\u97f3\u9891\u6587\u4ef6
\naudio = audio(:,1); % \u53d6\u5355\u58f0\u9053
\nt_total = (0:length(audio)-1)\/Fs; % \u603b\u65f6\u95f4\u8f74<\/p>\n

% \u9009\u53d6\u4e00\u6bb5\u8bed\u97f3\u5e27（\u907f\u514d\u9759\u97f3，\u53d6\u4e2d\u95f4\u6709\u6548\u90e8\u5206）
\nframe_len = 2048; % \u5e27\u957f（\u5efa\u8bae\u53d6\u91c7\u6837\u7387\u76841\/10~1\/5，\u598216kHz\u5bf9\u5e942048）
\nstart_idx = round(0.3*length(audio)); % \u8d77\u59cb\u7d22\u5f15
\nx = audio(start_idx:start_idx+frame_len-1); % \u622a\u53d6\u4e00\u5e27\u4fe1\u53f7
\nt_frame = (0:frame_len-1)\/Fs; % \u8be5\u5e27\u65f6\u95f4\u8f74<\/p>\n

% \u53ef\u89c6\u53161：\u539f\u59cb\u97f3\u9891\u5e27\u6ce2\u5f62
\nfigure('Name','\u6b65\u9aa41：\u539f\u59cb\u97f3\u9891\u5e27');
\nplot(t_frame, x, 'LineWidth',1.2);
\nxlabel('\u65f6\u95f4 (s)'); ylabel('\u632f\u5e45');
\ntitle('\u5f85\u5206\u6790\u7684\u97f3\u9891\u5e27\u6ce2\u5f62'); grid on;<\/p>\n

% \u6b65\u9aa42：\u8ba1\u7b97\u5dee\u5206\u51fd\u6570d(tao)
\nmax_lag = floor(frame_len\/2); % \u6700\u5927\u6ede\u540etao（\u4e0d\u8d85\u8fc7\u5e27\u957f\u4e00\u534a）
\nd = zeros(1, max_lag); % \u5dee\u5206\u51fd\u6570\u7ed3\u679c<\/p>\n

for tao = 1:max_lag
\n % \u5dee\u5206\u51fd\u6570：d(tao) = sum_{n=0}^{N-tao-1} (x(n) – x(n+tao))^2
\n d(tao) = sum( (x(1:end-tao) – x(1+tao:end)).^2 );
\nend<\/p>\n

% \u53ef\u89c6\u53162：\u5dee\u5206\u51fd\u6570\u66f2\u7ebf
\ntao_axis = 1:max_lag; % \u6ede\u540etao\u8f74
\nfigure('Name','\u6b65\u9aa42：\u5dee\u5206\u51fd\u6570d(tao)');
\nplot(tao_axis, d, 'b', 'LineWidth',1.2);
\nxlabel('\u6ede\u540etao (\u91c7\u6837\u70b9)'); ylabel('d(tao)');
\ntitle('\u5dee\u5206\u51fd\u6570（\u4fe1\u53f7\u5dee\u5f02\u7d2f\u79ef）'); grid on;<\/p>\n

% \u6b65\u9aa43：\u8ba1\u7b97\u7d2f\u79ef\u5e73\u5747\u5f52\u4e00\u5316\u5dee\u5206\u51fd\u6570（CMNDF）
\ncmndf = zeros(1, max_lag);
\ncmndf(1) = 1; % tao=0\u5904\u5b9a\u4e49\u4e3a1（\u907f\u514d\u9664\u4ee50）<\/p>\n

for tao = 2:max_lag
\n % \u5f52\u4e00\u5316：cmndf(tao) = d(tao) \/ ( (1\/tao) * sum_{j=1}^tao d(j) )
\n cmndf(tao) = d(tao) \/ ( (1\/tao) * sum(d(1:tao)) );
\nend<\/p>\n

% \u53ef\u89c6\u53163：CMNDF\u66f2\u7ebf
\nfigure('Name','\u6b65\u9aa43：\u7d2f\u79ef\u5e73\u5747\u5f52\u4e00\u5316\u5dee\u5206\u51fd\u6570（CMNDF）');
\nplot(tao_axis, cmndf, 'r', 'LineWidth',1.2);
\nxlabel('\u6ede\u540etao (\u91c7\u6837\u70b9)'); ylabel('CMNDF(tao)');
\ntitle('\u5f52\u4e00\u5316\u5dee\u5206\u51fd\u6570（\u6d88\u9664\u5e45\u5ea6\u5f71\u54cd）'); grid on;<\/p>\n

% \u6b65\u9aa44：\u9608\u503c\u68c0\u6d4b\u4e0e\u57fa\u9891\u5468\u671f\u5b9a\u4f4d
\nthreshold = 0.1; % \u9608\u503c（\u901a\u5e38\u53d60.1~0.2，\u53ef\u6839\u636e\u4fe1\u53f7\u8c03\u6574）
\nvalid_tao = find(cmndf < threshold); % \u627e\u5230\u6240\u6709\u5c0f\u4e8e\u9608\u503c\u7684tao<\/p>\n

if isempty(valid_tao)
\n % \u82e5\u65e0\u6709\u6548tao，\u53d6\u6700\u5c0fCMNDF\u5bf9\u5e94\u7684tao
\n [~, min_idx] = min(cmndf);
\n f0_period = min_idx;
\nelse
\n % \u53d6\u7b2c\u4e00\u4e2a\u5c0f\u4e8e\u9608\u503c\u7684tao\u4f5c\u4e3a\u57fa\u9891\u5468\u671f
\n f0_period = valid_tao(1);
\nend<\/p>\n

% \u53ef\u89c6\u53164：\u6807\u8bb0\u57fa\u9891\u5468\u671f\u5728CMNDF\u4e0a\u7684\u4f4d\u7f6e
\nfigure('Name','\u6b65\u9aa44：\u57fa\u9891\u5468\u671f\u68c0\u6d4b\u7ed3\u679c');
\nplot(tao_axis, cmndf, 'r', 'LineWidth',1.2);
\nhold on;
\nplot(f0_period, cmndf(f0_period), 'ko', 'MarkerSize',8, 'MarkerFaceColor','g');
\nline([0 max_lag], [threshold threshold], 'Color','k', 'Linestyle','–');
\ntext(max_lag*0.7, threshold+0.05, ['\u9608\u503c = ', num2str(threshold)], 'Color','k');
\nxlabel('\u6ede\u540etao (\u91c7\u6837\u70b9)'); ylabel('CMNDF(tao)');
\ntitle(['\u57fa\u9891\u5468\u671f\u5b9a\u4f4d：tao = ', num2str(f0_period), ' \u91c7\u6837\u70b9']);
\ngrid on; hold off;<\/p>\n

% \u6b65\u9aa45：\u8ba1\u7b97\u57fa\u9891\u5e76\u53ef\u89c6\u5316\u7ed3\u679c
\nf0 = Fs \/ f0_period; % \u57fa\u9891 = \u91c7\u6837\u7387 \/ \u5468\u671f（Hz）<\/p>\n

% \u53ef\u89c6\u53165：\u539f\u59cb\u4fe1\u53f7\u4e0e\u57fa\u9891\u6807\u6ce8
\nfigure('Name','\u6700\u7ec8\u7ed3\u679c：\u57fa\u9891\u503c');
\nplot(t_frame, x, 'LineWidth',1.2);
\nxlabel('\u65f6\u95f4 (s)'); ylabel('\u632f\u5e45');
\ntitle(['\u57fa\u9891\u68c0\u6d4b\u7ed3\u679c：', num2str(round(f0,1)), ' Hz']);
\ntext(t_frame(end)*0.7, max(x)*0.8, ['F0 = ', num2str(round(f0,1)), ' Hz'], …
\n 'BackgroundColor','y', 'FontWeight','bold');
\ngrid on;<\/p>\n

% \u8f93\u51fa\u7ed3\u679c
\ndisp(['\u68c0\u6d4b\u5230\u7684\u57fa\u9891：', num2str(round(f0,1)), ' Hz']);
\ndisp(['\u5bf9\u5e94\u7684\u5468\u671f：', num2str(f0_period), ' \u91c7\u6837\u70b9（', num2str(f0_period\/Fs*1000,2), ' ms）']); <\/p>\n

\u4ee3\u7801\u6548\u679c\u5c55\u793a：<\/h3>\n

\u8fd9\u662f\u539f\u59cb\u6ce2\u5f62\u2014\u2014<\/p>\n

\"\" <\/p>\n

\u7ba1\u5b50\u5439\u594f\u97f3\u8272\u7684\u6ce2\u5f62<\/p>\n

\u5dee\u5206\u51fd\u6570\u8fd9\u91cc，\u5bf9\u5e94\u7740\u201c\u505a\u51cf\u6cd5\u201d，\u56e0\u4e3a\u8fd9\u4e00\u6bb5\u97f3\u9891\u7684\u57fa\u9891\u662f\u4e00\u81f4\u7684，\u56e0\u6b64\u5dee\u5206\u51fd\u6570\u6bcf\u4e2a\u5cf0\u548c\u8c37\u7684\u5f62\u72b6\u975e\u5e38\u7c7b\u4f3c，\u53ea\u662f\u9ad8\u4f4e\u4e0d\u540c\u3002<\/p>\n

\"\"<\/p>\n

\u5f52\u4e00\u5316，\u6d88\u9664\u5e45\u5ea6\u7684\u5f71\u54cd，\u540c\u4e8b\u8ba9\u96f6\u70b9\u5904\u4e0d\u518d\u662f\u8c37\u503c<\/p>\n

\"\"<\/p>\n

\u8bbe\u5b9a\u9608\u503c0.1，\u63d0\u53d6\u7b2c\u4e00\u4e2a\u8c37\u503c\u3002<\/p>\n

\"\"<\/p>\n

\u5f97\u5230\u68c0\u6d4b\u7ed3\u679c：<\/p>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

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