In a digital telephone exchange voice signal is digitalized using 8- bits PCM. Calculate the final bit rate of the system. Voice: $300 \mathrm{HZ}-3.4 \mathrm{KH}, \mathrm{BW}=3 \mathrm{KHZ}$

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In a digital telephone exchange voice signal is digitalized using 8- bits PCM. Calculate the final bit rate of the system. Voice:

$300 \mathrm{HZ}-3.4 \mathrm{KH}, \mathrm{BW}=3 \mathrm{KHZ}$

written 2.4 years ago by

prajapatijaimin • 3.3k

• modified 2.4 years ago

digital communication

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written 2.4 years ago by

prajapatijaimin • 3.3k

Solution:

Steps involved in analog to digital conversion,

1) Sampling CT - DT

2) Quantization CA-DA

3) Encoding

$\mathrm{f}_{\mathrm{s}} \geq 2 \mathrm{f}_{\mathrm{m}}$ samples / sec Critical rate / Nyquist rate: $f_s=2 f_m \\$

$\Rightarrow \mathrm{f}_{\mathrm{s}}=2 \times 3.4 \mathrm{k}=6800 \text { samples / sec }\\$

Practical rate: …

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