Digital and quantized signal, are one same thing?

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Discussion Overview

The discussion revolves around the relationship between digital signals and quantized signals, exploring whether they are the same or different. It touches on various applications, including audio and video signals, and the modulation of digital data onto analog carriers.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants suggest that digital signals and quantized signals are generally the same, but this is conditional and depends on specific contexts.
  • One participant notes that while digital audio is a quantized signal, class D amplifiers, which quantize in the time dimension, are not classified as digital.
  • A question is raised about how calculators decode digital signals, indicating a need for clarification on the type of digital signal being discussed.
  • Another participant points out the variety of methods for modulating digital data onto analog carrier signals, mentioning specific standards like 8VSB, QAM, and DVB, which are used in different applications.

Areas of Agreement / Disagreement

Participants express differing views on the equivalence of digital and quantized signals, indicating that multiple competing perspectives remain without a clear consensus.

Contextual Notes

The discussion highlights the complexity of defining digital and quantized signals, with references to specific applications and modulation techniques that may influence understanding.

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digital and quantized signal, are one same thing?
 
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Generally, yes, but it depends. Digital audio is a quantized signal, but class D amplifiers (which quantize in the time dimension) are not considered digital. I guess you could think of digital as complete quantization.
 
greeniguana00 said:
Generally, yes, but it depends. Digital audio is a quantized signal, but class D amplifiers (which quantize in the time dimension) are not considered digital. I guess you could think of digital as complete quantization.

How the calculator decodes the digital signal?
 
Calculator? :confused:

Do you have some particular kind of digital signal in mind? Audio, video, or what?

Electrical engineering and electronics isn't my field, but I do know that there are a variety of ways of modulating digital data onto an analog carrier signal, and which ones are used depends on the application. For digital television, for example, there are 8VSB (ATSC) (used for broadcast TV in the USA and some other places), QAM (used for cable TV in the USA), DVB (used for broadcast TV in Europe), etc.
 
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