PHYSICAL LAYER AND TRANSMISSION MEDIA
DIGITAL TRANSMISSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the bit rate, if we digitize the human voice, assuming 8 bits per sample?
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32 kbps
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128 kbps
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64 kbps
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256 kbps
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Explanation:
Detailed explanation-1: -Bit rate = 8000X 8 = 64000 bps = 64 kbps . Use Delta congestion to compress the next 8 streams-bit whole numbers: 4 6 9 11 13 12 13 14 12 11. The human voice usually contains waves ranging from 0 to 4000 Hz. Therefore the sample rate and bit rate are calculated as 4.8 9.
Detailed explanation-2: -∴ Bit rate = Sampling rate × No. of bits per sample =8000×4=32, 000 bits/sec .
Detailed explanation-3: -Bit Rate = Total number of Bits per Baud x Baud Rate Here, the requirement of fewer signals indicates higher system efficiency and lesser bandwidth requirement for bits transmission.
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