Sound processing dividing words

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Leon Ellis 2021-9-13

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https://ww2.mathworks.cn/matlabcentral/answers/1452484-sound-processing-dividing-words

评论： Star Strider 2021-9-14

Good day, I'm audioreading a audio file with words said seperately, I.G, "One, two, three, four, five, six" till twenty. I plotted it and used the movemax() function to obtain a better idea of where the words start and end. The problem however is, to determine the starting point and ending point of each word. Everything I've tried fails and it's this task is due for tommorrow. Some of the words such as "six-teen" has two syllables and shouldn't have 2 start and ending points. This is what I have:

You can see the later words have 2 syllables and this is what makes most my ideas fail. I want to then use these startpoints and endpoints to plot word alone. (I've already made this function). Help would be extremely appreciated!! I really don't have much time left for this project and still have many others.

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Answer 1

Image Analyst 2021-9-13

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1452484-sound-processing-dividing-words#answer_786619

在 MATLAB Online 中打开

You can do this easily for well separated words (that have silence between them) by thresholding.

mask = y > 0.01; % Whatever.  It's a word if the amplitude is higher than 0.01
% Don't include "words" less than 5 elements long (or whatever you want);
mask = bwareaopen(mask, 5);
% Label each word with a unique identifying number ("label").
[labeledSignal, numWords] = bwlabel(mask);
% Extract each word
for k = 1 : numWords
    indexes = ismember(labeledSignal, k)
    thisWord = y(indexes);
    % Do whatever you want with thisWord.
end

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Image Analyst 2021-9-14

在 MATLAB Online 中打开

sentence.mat

Leon:

Here's a start. I didn't do all your homework for you since I'm sure your professor want your solution, not mine.

% Demo by Image Analyst
clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 20;
s = load('sentence.mat')
y = s.sentence;
subplot(2, 1, 1);
plot(y, 'b-');
grid on;
% Adjust threshold as necessary.
threshold = 0.003;
yline(threshold, 'color', 'r');
mask = y > threshold; % Whatever.  It's a word if the amplitude is higher than 0.01
% Get length of each word in number of elements.
props = regionprops(mask, 'Area');
allWordLengths = [props.Area]
% Get length of each silent part in number of elements.
% You'll need this to join two syllable words together into a single word.
props = regionprops(~mask, 'Area');
allSilentLengths = [props.Area]
% Don't include "words" less than 5 elements long (or whatever you want);
mask = bwareaopen(mask, 500);
subplot(2, 1, 2);
plot(mask, 'b-');
grid on;
% Get length of each word in number of elements.
props = regionprops(mask, 'Area');
allLengths = [props.Area]
% Label each word with a unique identifying number ("label").
[labeledSignal, numWords] = bwlabel(mask);
r = ceil(sqrt(numWords));
figure;
% Extract each word
for k = 1 : numWords
    indexes = ismember(labeledSignal, k);
    thisWord = y(indexes);
	% Plot this word.
	subplot(r, r, k);
	plot(thisWord, 'b-');
	caption = sprintf('Word #%d of %d', k, numWords);
	title(caption);
	drawnow;
	
    % Do whatever you want with thisWord.
end

Each word is plotted. For you to do, join each two syllable word into a single word based on the length of the silent part between the words.

Leon Ellis 2021-9-14

I cannot thank you enough, I had to just change the elements used to determine words with 1 syllable and 2. This was a great solution and work perfectly! I will change it up quite a bit but the concept will stay the same. Thank you very very much!

Star Strider 2021-9-14

My impression is that this is a homework assignment:

‘Everything I've tried fails and it's this task is due for tommorrow.’

‘I really don't have much time left for this project and still have many others.’

I decided to propose a solution to the problem of separating the words, since a complete solution would not be in the long-term best interests of the OP, and leave the rest. I’ve deleted my Answer.

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