[ACTIVITY] Multimedia WG - Weekly Status for wk39.2011 (20110926-20110930)

Christian Robottom Reis kiko at linaro.org
Thu Oct 6 14:30:40 UTC 2011


On Thu, Oct 06, 2011 at 08:44:01AM +0300, Fathi Boudra wrote:
> On 6 October 2011 00:43, Mans Rullgard <mans.rullgard at linaro.org> wrote:
> > On 5 October 2011 18:35, Christian Robottom Reis <kiko at linaro.org> wrote:
> >> On Wed, Oct 05, 2011 at 08:09:03PM +0300, Fathi Boudra wrote:
> >>> Debian/Ubuntu P are going to move to libjpeg8 by default making
> >>> current package obsolete in the future.
> >>
> >> Note that when we asked Darrell about this he questioned the performance
> >> benefits of version 8. Mans probably knows more.
> >
> > There is no benefit to v8.  v7 added support for the rarely/never used
> > arithmetic coding option, left out of earlier versions due to patent
> > issues.  Since nobody uses this mode, supporting it is irrelevant.
> > v8 only adds some experimental, non-standard coding options even less
> > relevant to any real-world uses.  What is relevant is, however, that
> > v8 is significantly slower than v6 in the default configuration.  I
> > don't remember if this slowdown was present already in v7.
> 
> According to Bill Allombert, v8 support more image format and provide
> a higher image quality.

I really question this statement based on what Mans and Darrell have
both said (a number of times now). Where is the hard data that shows
this is true?
-- 
Christian Robottom Reis, Engineering VP
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