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Re: Experiment on alternate SVG path syntax for better EXI compression

From: Chris Lilley <chris@w3.org>
Date: Fri, 29 May 2009 15:47:29 +0200
Message-ID: <834698272.20090529154729@w3.org>
To: FUJISAWA Jun <fujisawa.jun@canon.co.jp>
CC: W3C SVG Working Group <public-svg-wg@w3.org>, Youenn Fablet <youenn.fablet@crf.canon.fr>, <ikeda.yuji421@canon.co.jp>
On Friday, May 29, 2009, 11:17:33 AM, FUJISAWA-san wrote:

FJ> Hello SVG WG,

FJ> The attached is a input from Canon on a possible alternate SVG path
FJ> syntax which allows us to get better compression result when converted
FJ> into W3C Binary XML format (EXI).

Thanks for those, interesting reading. Thanks too for linking it to the appropriate issue.

A comparison of EXI with gzip compressed SVG would be particularly interesting, since the SVG path syntax was chosen both to be small by itself and also to compress well with gzip. I see from the report that this comparison is mentioned under further work.

If we add such syntax (and I suspect we will) I would like us to also deploy scripts/xslt/whatever that will convert, both ways, the two syntaxes.

FJ> ISSUE-2050 (path subelements): Consider additional path syntax 
FJ> <http://www.w3.org/Graphics/SVG/WG/track/issues/2050>

FJ> Any comments are wellcome.


FJ> Forwarded by FUJISAWA Jun <fujisawa.jun@canon.co.jp>
FJ> ----------------------- Original Message -----------------------
FJ>  From:    FABLET Youenn <Youenn.Fablet@crf.canon.fr>
FJ>  To:      "public-exi@w3.org" <public-exi@w3.org>
FJ>  Cc:      "fujisawa.jun@canon.co.jp" <fujisawa.jun@canon.co.jp>
FJ>  Date:    Thu, 28 May 2009 14:42:33 +0200
FJ>  Subject: 
FJ> ----

FJ> Dear all,

FJ> As some of you may remember, we had some discussions during TPAC
FJ> 2008 about how to use EXI for better SVG path compression.
FJ> During that discussion, I said that we made some experiments on
FJ> applying EXI compression on path data structured as XML trees.
FJ> The results were showing that, although the current compact
FJ> syntax does a really nice job, using EXI on XMLized path data
FJ> would certainly improve the situation, at least in the scenarios we are aware of.
FJ> Please find some more details related to that topic in the attached pdf file.

FJ> Regards,
FJ>                 youenn


FJ> --------------------- Original Message Ends --------------------





-- 
 Chris Lilley                    mailto:chris@w3.org
 Technical Director, Interaction Domain
 W3C Graphics Activity Lead
 Co-Chair, W3C Hypertext CG
Received on Friday, 29 May 2009 13:47:36 GMT

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