Pre-emphasis filter

Hello everybody

My question is:-

firstly,I should record any speech signal with 8KHZ and 8 bit and I don't know how can I apply speech signal with (8KHZ and 8 bit) and then I must pass this speech signal throw pre-emphasis filter and finaly I listen to the differencr after and before filtering. But another confusing thing for me that my pro said I must use cinvolution in my program

And I did my program but I'm not sure from it because I have error like this

??? Error using ==> conv at 27 A and B must be vectors.

Error in ==> speech2 at 18 s3=conv(s1,ypre);

and I don't know how can I add 8kHZ and 8 bit in true form in my program

The program:-

f=8000;
apre=[1];
[s1,f]=wavread('C:\Users\N\Desktop\family.wav');
figure(1)
plot(s1)
title('speech signal');
sound(s1,f);
pause
% design pre-emphasis filter
bpre=[1 -0.95];
fvtool(bpre,apre);
ypre=filter(bpre,apre,s1);
figure(2)
plot(ypre);
title('First filter response');
sound(ypre,f);
pause
s3=conv(s1,ypre);
figure(3);
plot(s3);
title('speech after filtering');
sound(m,fs);
pause

[Sivaji Thammisetty]

Send code for pre emphasis by matlab

Answer 1

[Andrei Bobrov]

try

s3 = cell2mat(arrayfun(@(x)conv(s1(:,x),ypre(:,x),'same'),1:2,'un',0));

or

s3 = zeros(size(s1));
for j1 = 1:size(s1,2)
    s3(:,j1) = conv(s1(:,j1),ypre(:,j1),'same');
end

[sara s]

Thanks a lot Teacher andrei but I want to know,how can I use 8 bit inside my program,my prof said this instruction must be included in the program

[t1,t2]=freqz(h,1,1024)

and I don't know how can I included this instruction inside my program and what is the benefit of it in the program.

Thanks in advance

[sara s]

Please,help me in the second part!

Answer 2

[Kinza]

i have to process a recorded audio like "One Two Three Four Five" in MATLAB for a processor but i am confusing how to choose specific pre emphasis filter"