[vorbis-dev] comparisons

[Nelson Rush]

<nod> That I understand, I've dabbled in compression. It just seemed that
gzip had significantly reduced the size IMHO. When you have thousands of
these files on your system, 10k to 30k reduction per file can be a lot. I
was actually suprised that it made that much of a difference. It did succeed
in making the ogg smaller than the mp3, which was what my goal was. Now I
just need to hack the plugin to deflate on the fly. ;-)

-----Original Message-----
From: owner-vorbis-dev at xiph.org [mailto:owner-vorbis-dev at xiph.org]On
Behalf Of prabu
Sent: Tuesday, August 22, 2000 9:01 PM
To: vorbis-dev at xiph.org
Cc: chesterr at att.net
Subject: Re: [vorbis-dev] comparisons

Nelson,
LZV based compression tools are suitable only for files with a predictable
set of values in them, unlike audio files. So they cannot compress MP3 files
much, which are already "redundancy-removed" through Huffman algorithm.

----- Original Message -----
From: Nelson Rush <chesterrr at att.net>
To: <vorbis-dev at xiph.org>
Sent: Tuesday, August 22, 2000 5:12 PM
Subject: [vorbis-dev] comparisons

> I converted the 128kbps tom.mp3 file into a .wav and then used oggenc -m 2
> to
> laterally encode it to 128kbps tommy.ogg format. I noticed that it gets
very
> close to the size of an mp3, great job guys. Then I got to thinking that
> maybe it could be compressed further with gzip so I tried it. I also
gzipped
> the mp3 to compare and it looks like the mp3 gzips better but gzipping the
> ogg file will get the size a bit smaller than an ungzipped mp3. I'm not
sure
> if it's really worth the decompression overhead, although gzip is pretty
> fast even though I used -9.
>
> Sorry if I'm a bit naive about compression. ;-)
>
> -rw-r--r--   1 palisade users          4007318 Aug 22 16:31 tommy.ogg
> -rw-r--r--   1 palisade users          3989911 Aug 22 16:57 tommy.ogg.gz
> -rw-r--r--   1 palisade users          3991638 Aug 22 16:41 tom.mp3
> -rw-r--r--   1 palisade users          3959108 Aug 22 16:48 tom.mp3.gz
>
> Sincerely,
> Nelson Rush
>
> "<Operandi> well flog me like a misbehaving circus clown"
>
>
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> List archives:  http://www.xiph.org/archives/
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>

--- >8 ----
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