Pulse-Code Modulation (PCM) Quiz

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Questions and Answers

What is the standard form of digital audio in computers, compact discs, and digital telephony?

  • A-law algorithm
  • Pulse-code modulation (PCM) (correct)
  • μ-law algorithm
  • Linear pulse-code modulation (LPCM)

In which type of PCM are the quantization levels linearly uniform?

  • A-law algorithm
  • Non-linear pulse-code modulation (NLPCM)
  • Linear pulse-code modulation (LPCM) (correct)
  • μ-law algorithm

What determines the number of possible digital values in a PCM stream?

  • Amplitude of the analog signal
  • Sampling rate
  • Quantization levels
  • Bit depth (correct)

Which property of a PCM stream is defined as the number of times per second that samples are taken?

<p>Sampling rate (A)</p> Signup and view all the answers

In contrast to LPCM, which PCM encodings have quantization levels that vary as a function of amplitude?

<p>A-law algorithm and μ-law algorithm (A)</p> Signup and view all the answers

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Study Notes

Digital Audio Standards

  • The standard form of digital audio in computers, compact discs, and digital telephony is Pulse Code Modulation (PCM).

PCM Quantization

  • In Linear PCM (LPCM), the quantization levels are linearly uniform.

PCM Stream Properties

  • The number of possible digital values in a PCM stream is determined by the number of bits used for quantization.
  • The sampling rate of a PCM stream is defined as the number of times per second that samples are taken.

Non-Linear PCM Encodings

  • In contrast to LPCM, non-linear PCM encodings, such as A-law and μ-law, have quantization levels that vary as a function of amplitude.

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