Question

In PCM telephony, companding is used to do which of the following?

1.
Increase the bandwidth of the channel
2.
Convert analogue signals to optical signals
3.
Reduce the sampling rate
4.
Improve the signal-to-noise ratio for low-level speech signals
Answer (Detailed Solution Below)

Option 4 : Improve the signal-to-noise ratio for low-level speech signals

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Detailed Solution

सही उत्तर Improve the signal-to-noise ratio for low-level speech signals है।

Key Points

Companding compresses the dynamic range of speech so that low-level signals get more quantisation steps, improving their signal-to-noise ratio.

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More Domain Specific Questions

PrepSnapprepsnap.in • Domain Specific

Question:

In PCM telephony, companding is used to do which of the following?

1.
Increase the bandwidth of the channel
2.
Convert analogue signals to optical signals
3.
Reduce the sampling rate
4.
Improve the signal-to-noise ratio for low-level speech signals

Correct Answer: Improve the signal-to-noise ratio for low-level speech signals

Companding compresses the dynamic range of speech so that low-level signals get more quantisation steps, improving their signal-to-noise ratio.

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