Upsampling? Down-sampling???

Discussion in 'Archived Threads 2001-2004' started by gomez_a, Dec 6, 2001.

  1. gomez_a

    gomez_a Stunt Coordinator

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    I have an Onkyo 898 w/upsampling capability . .can some one explain what this is all about?.

    When to use it?

    What are the benefits?

    As I see it, cd's are done with 44.1kHz sampling rates or there abouts with some 8? or 14? bit resolution (I can't recall the specs), so if I up-sample to a higher sampling rate/bit res what good would that do if the native material was recorded @44.1kHz sampling rates? What am I missing here?
     
  2. John Kotches

    John Kotches Cinematographer

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    By upsampling you can do two potential things:

    1) Use gentler sloped anti-aliasing filters on the DAC output. This is technically a very good thing, as it minimizes pre and post ringing (inaccuracies in the reprodcuced signal in other words).

    2) Some upsamplers use specific algorithms to "guesstimate" what the missing samples might be. Some like this effect, others do not.

    Hope this helped.

    Regards,
     
  3. gomez_a

    gomez_a Stunt Coordinator

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    Hello John,

    Thanks for responding . . generally speaking is this usually used when playing CD's? What of DVD's?

    Thanks,

    Angel
     

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