Page 33 - eBOOK FUNDAMENTAL OF TELECOMMUNICATION NETWORK
P. 33
DATA RATE FOR
VOICE
Voice Frequency Band, f
fmin = 0Hz
fmax = 4000Hz = 4kHz
Sampling Frequency, fs (Nyquist Theorem )
fs = 2 fmax
fs = 2 x 4000Hz
= 8000Hz @ 8kHz
Number of bits : Telephone/Voice = 8 bits
Data rate for single voice channel = fs x no of bit x no of channel
= 8000 x 8 bit x 1 channel
= 64 kbit/s
This data rate as a basic rate for all transmission
system (i.e multiplexing hierarchies) in digital
telecommunication networks.
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