Thread Subject:

urgent help! high frequency emphasis filter

does anyone know how to make a pre-emphasis filter?
my source says it has a formula of H(z) = 1-az^-1

where a is empirically equal to 1.

does anyone know how to code this?
help! i really need this one!

Use
y = filter(b,a,X);

for you case:
a=1;
b=[1-1]

Beacause if H(z) is impule responce image then Y(z)=H(z)*X(z)


-----------------------------------------
Maxim Vedenev, MATLAB Custom Programming
vedenev@ngs.ru
http://simulations.narod.ru/

vedenev <vedenev.maxim@gmail.com> wrote in message <5a82924f-d9c7-44c2-8beb-394eacf7c044@h20g2000yqn.googlegroups.com>...
> Use
> y = filter(b,a,X);
>
> for you case:
> a=1;
> b=[1-1]
>
> Beacause if H(z) is impule responce image then Y(z)=H(z)*X(z)
>
>
> -----------------------------------------
> Maxim Vedenev, MATLAB Custom Programming
> vedenev@ngs.ru
> http://simulations.narod.ru/
>

is b = 1 and -1?