Q29,p3,J15.Suppose a digitized voice channel is made by digitizing 8KHZ bandwith Analog voice signal .It is required to sample the signal at twice the highest frequency (two samples per hertz)..What is the rate required ,if it is assumed that each sample requires 8 bits.

Options
A) 32kbps           B)64 KBPS              C)128 KBPS                D)256 KBPS.

Answer C.

Bandwidth of analog cahnnel is 8K/Sec.
Required sample 2/hz. =2s.
one sample is 8 bit.
so bit rate = (8k)*2*(8 bit)=128 kbps.