Tuesday, August 23, 2011

VOICE SWITCHING IN CELLULAR NETWORKS : Introduction

INTRODUCTION:

} In near future most computer will be portable and users will access network without wire i.e., wireless

} An acceptable level of intelligibility of speech is obtained by transmitting frequencies in the range 300-3400 Hz.

} Voice is sampled at 8000 samples per second with 8 bits per sample . This results in a digital signal of 64kbps which is sent as data frames over a circuit switched network

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