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hi,

Can anyone tell me:(I am a biginer in DSP)

How phase distortion affects signal? How to detect it?
What will be the effect of it on audibility?

Thanks in advance,
Nawab Ahmad
	

(You need to be a member of audiodsp -- send a blank email to audiodsp-subscribe@yahoogroups.com )

Hi Nawab

You can try this yourself and see, phase is very
important for an signal cos it has more information
than frequency. consider this example

you have a signal x(t), which consist of 3 sine waves
with freq w1 w2 w3, and initial phase phi1 phi2
phi3.a1 a2 a3 that is

x(t) = a1*sin(w1*t+phi1) + a2*sin(w1*t+phi2)
+a3*sin(w1*t+phi3)

u can plot this and see in matlab. Now try changing
inital phases phi_i to some other value and plot it
and 
see for eg

x1(t)= a1*sin(w1*t+phi5) + a2*sin(w1*t+phi6)
+a3*sin(w1*t+phi4)

The signal x1 and x are not same cos there is change
in phase information although the freq spectrum will
remain same. its very imp to retain the phase
information esp in speech and image signals. 

I hope this helps

regards
Amit

--- nawab ahmad <nawab_01cs33@nawa...> wrote:
	---------------------------------
hi,

Can anyone tell me:(I am a biginer in DSP)

How phase distortion affects signal? How to detect it?
What will be the effect of it on audibility?

Thanks in advance,
Nawab Ahmad
	

(You need to be a member of audiodsp -- send a blank email to audiodsp-subscribe@yahoogroups.com )