POV-Ray : Newsgroups : povray.off-topic : Data compression : Re: Data compression Server Time
29 Jul 2024 20:25:10 EDT (-0400)
  Re: Data compression  
From: Invisible
Date: 11 May 2011 04:06:48
Message: <4dca4398$1@news.povray.org>
>> You can't tell that information has been lost unless you can tell that it
>> was there in the first place. And if you can tell there's something
>> missing
>> just by looking at what's still there, there's redundancy.
>
> Except you can compare to that which you've heard elsewhere. Have you
> ever heard someone do a call-in phone interview on the radio? Could you
> tell the difference between the DJ's voice and the phoned-in voice, even
> though you might never have heard either before? It's because you know
> what tonal ranges you should be hearing.
>
> You can tell an over-compressed violin because you're comparing it to
> other, uncompressed violins in your memory. Even if there's no
> redundancy left. Indeed, why do you not think you're hearing a lack of
> redundancy?

Like I said, I can hear glitches in various quiet echo trails. The sound 
should die away smoothly, but instead it's stepping. The codec is 
apparently ignoring temporal redundancy.


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