Suppose a digitazed voice channel is made by digitizing 8 kHz bandwidth analog…
2015
Suppose a digitazed voice channel is made by digitizing 8 kHz bandwidth analog voice signal. It is required to sample the signal at twice the highest frequency (two samples per hertz). What is the bit rate required, if it is assumed that each sample required 8 bits ?
- A.
32 kbps
- B.
64 kbps
- C.
128 kbps
- D.
256 kbps
Attempted by 55 students.
Show answer & explanation
Correct answer: C
Solution: compute the sampling rate and then the bit rate.
Sampling rate = 2 × 8 kHz = 16 kHz = 16,000 samples/sec.
Bit rate = sampling rate × bits per sample = 16,000 × 8 = 128,000 bps = 128 kbps.
Therefore the required bit rate is 128 kbps.
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