语音识别matlab

使用matlab编写语音识别项目，可以进行实验，也可以在我的项目之上进行改进和改善。

function checkNNGradients（lambda）
%CHECKNNGRADIENTS Creates a small neural network to check the
%backpropagation gradients
%   CHECKNNGRADIENTS（lambda） Creates a small neural network to check the
%   backpropagation gradients it will output the analytical gradients
%   produced by your backprop code and the numerical gradients （computed
%   using computeNumericalGradient）. These two gradient computations should
%   result in very similar values.
%

if ~exist（‘lambda‘ ‘var‘） || isempty（lambda）
    lambda = 0;
end

input_layer_size = 3;
hidden_layer_size = 5;
num_labels = 3;
m = 5;

% We generate some ‘random‘ test data
Theta1 = debugInitializeWeights（hidden_layer_size input_layer_size）;
Theta2 = debugInitializeWeights（num_labels hidden_layer_size）;
% Reusing debugInitializeWeights to generate X
X  = debugInitializeWeights（m input_layer_size - 1）;
y  = 1 + mod（1:m num_labels）‘;

% Unroll parameters
nn_params = [Theta1（:） ; Theta2（:）];

% Short hand for cost function
costFunc = @（p） nnCostFunction（p input_layer_size hidden_layer_size ...
                               num_labels X y lambda）;

[cost grad] = costFunc（nn_params）;
numgrad = computeNumericalGradient（costFunc nn_params）;

% Visually examine the two gradient computations.  The two columns
% you get should be very similar. 
disp（[numgrad grad]）;
fprintf（[‘The above two columns you get should be very similar.\n‘ ...
         ‘（Left-Your Numerical Gradient Right-Analytical Gradient）\n\n‘]）;

% Evaluate the norm of the difference between two solutions.  
% If you have a correct implementation and assuming you used EPSILON = 0.0001 
% in computeNumericalGradient.m then diff below should be less than 1e-9
diff = norm（numgrad-grad）/norm（numgrad+grad）;

fprintf（[‘If your backpropagation implementation is correct then \n‘ ...
         ‘the relative difference will be small （less than 1e-9）. \n‘ ...
         ‘\nRelative Difference: %g\n‘] diff）;

end

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-04-21 13:57  Speech_Recognition-master\
     文件          26  2018-04-21 13:57  Speech_Recognition-master\README.md
     文件       40134  2018-04-21 13:57  Speech_Recognition-master\SpeechRecognizer.fig
     文件        5119  2018-04-21 13:57  Speech_Recognition-master\SpeechRecognizer.m
     文件        3431  2018-04-21 13:57  Speech_Recognition-master\Speech_Neural_Network_Classifier.m
     文件        1979  2018-04-21 13:57  Speech_Recognition-master\Speech_one_vs_all_Classifier.m
     文件        2257  2018-04-21 13:57  Speech_Recognition-master\Speech_single_hidden_layer_NN_Classifier.m
     文件        1443  2018-04-21 13:57  Speech_Recognition-master\Speech_softmax_Classifier.m
     文件        1950  2018-04-21 13:57  Speech_Recognition-master\checkNNGradients.m
     文件        1295  2018-04-21 13:57  Speech_Recognition-master\computeNumericalGradient.m
     文件         841  2018-04-21 13:57  Speech_Recognition-master\debugInitializeWeights.m
     文件        4402  2018-04-21 13:57  Speech_Recognition-master\dum_nncostfunction.m
     文件         609  2018-04-21 13:57  Speech_Recognition-master\dum_predict.m
     文件         511  2018-04-21 13:57  Speech_Recognition-master\features.m
     文件        8749  2018-04-21 13:57  Speech_Recognition-master\fmincg.m
     目录           0  2018-04-21 13:57  Speech_Recognition-master\lib\
     文件           1  2018-04-21 13:57  Speech_Recognition-master\lib\.gitkeep
     目录           0  2018-04-21 13:57  Speech_Recognition-master\lib\lib\
     目录           0  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\
     文件        1624  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\AUTHORS.txt
     文件        3862  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\ChangeLog.txt
     文件        1551  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\LICENSE_BSD.txt
     文件       19369  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\README.txt
     文件         881  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\jsonopt.m
     文件       18732  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\loadjson.m
     文件       15574  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\loadubjson.m
     文件         771  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\mergestruct.m
     文件       17462  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\savejson.m
     文件       16123  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\saveubjson.m
     文件        1094  2018-04-21 13:57  Speech_Recognition-master\lib\lib\jsonlab\varargin2struct.m
     文件        1195  2018-04-21 13:57  Speech_Recognition-master\lib\lib\makeValidFieldName.m
............此处省略67个文件信息