Re: [LAD] new lossless/lossy audio compressor

Could do that... I wonder if the compression ratio would suffer,
though. Just a hunch.

-PW

On Wed, Jul 25, 2007 at 01:37:18PM -0700, Gregory Alan Hildstrom wrote:
> The JasPer library documentation states that a single image component can be from 1 to 16 bits per
> sample, so not directly. 24-bit color images are actually treated as 3 8-bit components: like one
> red component, one green component, and one blue component.
>
> For lossless compression, we could easily place the most significant 16 bits in the first image
> component and place the least significant 16 bits in a second image component of each frame. It
> should also be possible to code something up that does the same sort of 16-bit splitting into 2
> flac files. -Greg
>
> --- Paul Winkler <pw_lists@email-addr-hidden> wrote:
>
> > Pretty cool. Does JPEG 2000 handle float data?
> >
> > I'd love to be able to write an archive script for Ardour sessions
> > that compresses the audio data losslessly, but FLAC won't do it.
> >
> >
> > -PW
> >
> > On Wed, Jul 25, 2007 at 12:47:16PM -0700, Gregory Alan Hildstrom wrote:
> > > Hello. I just finished writing and documenting a new lossless and lossy audio codec called
> > > j2kaudio. It uses the wavelet compression in JPEG 2000 to transcode audio wav data to and from
> > j2a
> > > files. I have not written any sort of media player plugin yet; more testing and file format
> > > refinement are necessary first.
> > >
> > > I tested with 44100Hz, 16-bit, stereo CD-quality wav files, but it also supports other sample
> > > rates, precisions, and channel numbers.
> > >
> > > I tested against flac, lpac, shorten, and monkey's audio for lossless encoding. j2kaudio beat
> > the
> > > nearest competition by over 10%.
> > >
> > > If anyone is motivated to test some additional songs, provide me with additional test data, or
> > > suggest another untested codec, please let me know.
> > >
> > > http://geocities.com/hildstrom/projects/j2kaudio/index.html
> > >
> > > Let me know what you think. Thanks. -Greg
> > >
> > >
> > > Gregory Alan Hildstrom
> > > Secure Systems Engineer - Trusted Computer Solutions
> > > trustedcs.com
> > > ghildstrom@email-addr-hidden
> > > Software Engineer - Hildstrom Engineering
> > > geocities.com/hildstrom
> > > hildstrom@email-addr-hidden
> > > Mobile:(210)413-6082
> > > Fax:(210)599-0469
> > > Office:(210)340-3151x117
> > > _______________________________________________
> > > Linux-audio-dev mailing list
> > > Linux-audio-dev@email-addr-hidden
> > > http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-dev
> >
> > --
> >
> > Paul Winkler
> > http://www.slinkp.com
> > _______________________________________________
> > Linux-audio-dev mailing list
> > Linux-audio-dev@email-addr-hidden
> > http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-dev
> >
>
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-- 
Paul Winkler
http://www.slinkp.com
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