Re: [idn] I-D ACTION:draft-ietf-idn-lsb-ace-02.txt

["Soobok Lee" <lsb@postel.co.kr>]

Hi, all

This table summarizes the # of max chars in labels in each script block.
This will be included the next revision of reordering I-D.
For han/hangul block, REORDERING+ACE-Z outperforms DUDE by nearly 200%.
If you have suggestions or other label samples to test with, 
please leave me a note.
 
Thanks.

Soobok Lee,   lsb@postel.co.kr


+------------------------------------------------------------+
|Maximum number of characters in a label in each script block|
|                                                            |
|                max char = (63 - 4) / ratio                 |
|   ACE length = 4 + ratio * N ( N : # of chars in label)    |
+---------------+-------------------+-------------------+----+
| Script Block  |     AMC-ACE-Z     |   Reordering +    |Gain|
|               |                   |     AMC-ACE-Z     |    |
+---------+-----+---------+---------+---------+---------+    |
|  Name   |Size |  ratio  |max char |  ratio  |max char |    |
+---------+-----+---------+---------+---------+---------+----+
|   Han   |20992|  2.98   |   19    |  2.21   |   26    | +7 |
+---------+-----+---------+---------+---------+---------+----+
| Hangeul |11172|  2.97   |   19    |  2.04   |   28    | +9 |
+---------+-----+---------+---------+---------+---------+----+
|  Greek  | 144 |  1.29   |   45    |  1.14   |   51    | +6 |
+---------+-----+---------+---------+---------+---------+----+
| Arabic  | 256 |  1.34   |   44    |  1.28   |   46    | +2 |
+---------+-----+---------+---------+---------+---------+----+
|Cyrillic | 304 |  1.23   |   47    |  1.15   |   51    | +4 |
+---------+-----+---------+---------+---------+---------+----+
| Hebrew  | 102 |  1.29   |   45    |  1.18   |   50    | +5 |
+---------+-----+---------+---------+---------+---------+----+
|  Hindi  | 128 |  1.31   |   45    |  1.17   |   50    | +5 |
+---------+-----+---------+---------+---------+---------+----+
|Hiragana | 96  |  1.50   |   39    |  1.45   |   40    | +1 |
+---------+-----+---------+---------+---------+---------+----+
|Katakana | 96  |  1.44   |   40    |  1.33   |   44    | +4 |
+---------+-----+---------+---------+---------+---------+----+
|  Tamil  | 128 |  1.62   |   36    |  1.14   |   51    |+15 |
+---------+-----+---------+---------+---------+---------+----+
|  Thai   | 128 |  1.39   |   42    |  1.13   |   52    |+10 |
+---------+-----+---------+---------+---------+---------+----+
|Ethiopic | 416 |  2.10   |   28    |  1.60   |   36    | +8 |
+---------+-----+---------+---------+---------+---------+----+


----- Original Message ----- 
From: <Internet-Drafts@ietf.org>
To: <IETF-Announce:>
Cc: <idn@ops.ietf.org>
Sent: Tuesday, September 18, 2001 10:33 PM
Subject: [idn] I-D ACTION:draft-ietf-idn-lsb-ace-02.txt


> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Internationalized Domain Name Working Group of the IETF.
> 
> Title : Improving ACE using code point reordering v2.0
> Author(s) : S. Lee
> Filename : draft-ietf-idn-lsb-ace-02.txt
> Pages : 
> Date : 17-Sep-01
> 
> This document describes a method to improve ACE label efficiency by
> frequency-based temporal reordering of code points in ACE encoding
> and decoding processes in order to relocate scattered frequent 
> characters into much more compact area in reordered code space.
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