audio read error in speech recognition using lpc

%Add path of the Training Data

addpath('\matlab cde');

%Record your sound command

w=1;

while(1)

recObj = audiorecorder; % Initialised speech recorder object

in=input('Press a to command and x to exit...','s');

if in == 'a'

disp('Start')

recordblocking(recObj, 1.2); % Recording speech

disp('Stop');

y = getaudiodata(recObj); % Converting recorded speech to array

d=fdesign.highpass('Fst,Fp,Ast,Ap',8700/16000,10000/16000,40,1); % Highpass filter

hp=design(d); % Highpass filter object

x=filter(hp,y); % Filter applied to data

%Set Variables

NoOfSamples = 100;

Letters = {'oil'}; % Samples that are in the Voice templates directory

% LPC parameters

NoOfLPCFilters = 20; % Setting number of LPC filters

lpccoeff = zeros(size(Letters,2)*NoOfSamples,NoOfLPCFilters+1);

% LPC Training for all letters

for ii = 1:size(Letters,2);

ll = 1;

for kk = 1:NoOfSamples

file_name = strcat(Letters(ii),int2str(kk),'.wav');

Samples = audioread(char(file_name));

zz = find(Samples) < max(Samples/3);%Threshold speech regions

Samples(zz) = 0;

zz = find(Samples);

Speech_Region = Samples(zz)/norm(Samples(zz));

lpccoeff(ii,ll,:) =lpc(Speech_Region,NoOfLPCFilters);

ll = ll + 1;

end

end

% Prepare Gaussian distribution for LPC coeffs of all samples

tempStorage = zeros(1*NoOfSamples,NoOfLPCFilters);

tempStorage(:,:) = lpccoeff(1,:,2:end);

obj_A2 = gmdistribution.fit(tempStorage,1);

tempStorage(:,:) = lpccoeff(2,:,2:end);

obj_B2 = gmdistribution.fit(tempStorage,1);

tempStorage(:,:) = lpccoeff(3,:,2:end);

obj_C2 = gmdistribution.fit(tempStorage,1);

tempStorage(:,:) = lpccoeff(4,:,2:end);

obj_D2 = gmdistribution.fit(tempStorage,1);

tempStorage(:,:) = lpccoeff(5,:,2:end);

obj_E2 = gmdistribution.fit(tempStorage,1);

% Extract LPC for test data

Samples = x;

zz = find(Samples) < max(Samples/3);%Threshold speech regions

Samples(zz) = 0;

zz = find(Samples);

Speech_Region = Samples(zz);

lpc_test = lpc(Speech_Region,NoOfLPCFilters);

% Classify LPC test data based on Mahanalobis distance

D2(1) = mahal(obj_A2,lpc_test(2:end));

D2(2) = mahal(obj_B2,lpc_test(2:end));

D2(3) = mahal(obj_C2,lpc_test(2:end));

D2(4) = mahal(obj_D2,lpc_test(2:end));

D2(5) = mahal(obj_E2,lpc_test(2:end));

plot(x);

%Checking for min i.e the best match and result

m2 = min(D2);

if m2==D2(1)

disp('Forward');

%fprintf(s,'Forward');

elseif m2==D2(2)

disp('Backward');

%fprintf(s,'Backward');

elseif m2==D2(3)

disp('Left');

%fprintf(s,'Left');

elseif m2==D2(4)

disp('Right');

%fprintf(s,'Right');

elseif m2==D2(5);

disp('oil');

end

end

if in == 'x'

%fclose(s);

% error('Program Terminated !!!');

break;

end

w=w+1;

end

and the error is

Error using audioread (line 74)

The filename specified was not found in the MATLAB path.

Error in 2mm (line 47)

Samples = audioread(char(file_name));

Answer 1

[Ceren Mine Esen]

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