1. What is the difference between speech signal attained from mobile and that of telephone?

2. How to eliminate such terrible distinct difference? Is it possible? Here I only wanna know the principle of algorithm ,for it can not be fully explained in a post. And if you would like ,you can tell more.

3. Which institutions/Masters have been engaged in that study? The present achievement?

Any comments would be appreciated!

Cheers
HyeeWang@gmail.com

Anyway,I am talking the speech quality,not communication mode and bitstream rate.

For the terrible difference of speech quality,it must use different algo when
performing speech recognition and speaker identification.
I wanna eliminate the difference between them and thus can use the same algo.

Hi

You propably get "more attention" @ http://www.dsprelated.com/

Juha

Thank you.

Cell phones use one of several extremely low-rate codecs.

Land lines use 64kb/s muLaw (or a-Law over there on the right side of the ocean)

The difference in distortion between 4.8 kb/s and 64kb/s is not surprising.

(cell phones range from 4.8 upwards to something like 16kb/s, but it's been a few years since I was in a telco company)