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A digitized voice channel is made by digitizing a 4-kHz bandwidth analog voice signal. We need to sample the signal at twice the highest frequency (two samples per hertz). We assume that each sample requires 8 bits. What is the required bit rate?

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A digitized voice channel is made by digitizing a 4-kHz bandwidth analog voice signal. We need to sample the signal at twice the highest frequency (two samples per hertz). We assume that each sample requires 8 bits. What is the required bit rate?

(a) 64 kbps

(b) 32 kbps

(c) 128 kbps

(d) 16 kbps

I got this question in an internship interview.

I would like to ask this question from Layers topic in portion Cryptography Overview, TCP/IP and Communication Networks of Cryptograph & Network Security

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The correct option is (a) 64 kbps

The explanation is: 2 × 4000 × 8 = 64,000 = 64kbps.

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