Comments on: Amazonmp3 http://blog.cosmix.org/2007/09/25/amazonmp3/ Thu, 11 Mar 2010 11:38:09 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Μήπως iPhone δεν είναι αυτό που περιμέναμε; « Oxygono Blog http://blog.cosmix.org/2007/09/25/amazonmp3/comment-page-1/#comment-23325 Μήπως iPhone δεν είναι αυτό που περιμέναμε; « Oxygono Blog Sun, 30 Sep 2007 10:24:54 +0000 http://blog.cosmix.org/2007/09/25/amazonmp3/#comment-23325 [...] αρχίσει να κυκλοφορούν non-DRM music stores με το πιο πρόσφατο Amazon Music Store, το οποίο το έχει η Amazon κι όχι καμιά startup εταιρία με [...] [...] αρχίσει να κυκλοφορούν non-DRM music stores με το πιο πρόσφατο Amazon Music Store, το οποίο το έχει η Amazon κι όχι καμιά startup εταιρία με [...]

]]> By: cosmix http://blog.cosmix.org/2007/09/25/amazonmp3/comment-page-1/#comment-23311 cosmix Wed, 26 Sep 2007 11:32:06 +0000 http://blog.cosmix.org/2007/09/25/amazonmp3/#comment-23311 <blockquote>Isn’t the mp3 codec updated regularly? Isn’t it getting better and better over time?</blockquote> No, the mp3 codec is not getting better and it isn't updated. mp3 hasn't changed since it was finalised more than a 15 years ago. Now, the specification is quite open with regards to the encoding process (i.e. which data to lose from the original bitstream) yet there are limits as to how smart you can be without creating an incompatible file. As such, software encoders have definitely improved over time, but they achieved this through smarter signal processing and the use of VBR. Other codecs, such as AAC have several features that vastly improve sound qualtiy over mp3 at a given bitrate. <a href="http://en.wikipedia.org/wiki/Advanced_Audio_Coding#AAC.E2.80.99s_improvements_over_MP3" rel="nofollow">Check Wikipedia</a> for a list of improvements for AAC (and some more substantial references) if you're interested.

Isn’t the mp3 codec updated regularly? Isn’t it getting better and better over time?

No, the mp3 codec is not getting better and it isn’t updated. mp3 hasn’t changed since it was finalised more than a 15 years ago. Now, the specification is quite open with regards to the encoding process (i.e. which data to lose from the original bitstream) yet there are limits as to how smart you can be without creating an incompatible file. As such, software encoders have definitely improved over time, but they achieved this through smarter signal processing and the use of VBR.

Other codecs, such as AAC have several features that vastly improve sound qualtiy over mp3 at a given bitrate. Check Wikipedia for a list of improvements for AAC (and some more substantial references) if you’re interested.

]]> By: Alex http://blog.cosmix.org/2007/09/25/amazonmp3/comment-page-1/#comment-23310 Alex Wed, 26 Sep 2007 09:37:28 +0000 http://blog.cosmix.org/2007/09/25/amazonmp3/#comment-23310 Great news! One question though... Isn't the mp3 codec updated regularly? Isn't it getting better and better over time? I mean, I own songs encoded with old versions of the encoder and today they sound terrible in comparison to songs encoded with newer encoder. So, why go AAC (or Ogg or WMA or whatever)? Great news! One question though… Isn’t the mp3 codec updated regularly? Isn’t it getting better and better over time?

I mean, I own songs encoded with old versions of the encoder and today they sound terrible in comparison to songs encoded with newer encoder.

So, why go AAC (or Ogg or WMA or whatever)?

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