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Imported Upstream version 0.72.4

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TANIGUCHI Takaki
2012-04-08 21:33:59 +09:00
parent cef31abc8c
commit 2f23ea4b4a
1170 changed files with 116562 additions and 55295 deletions
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28
documentation/en/howtos61.php
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@@ -1,6 +1,6 @@
<?php
# dvdisaster: English homepage translation
# Copyright (C) 2004-2010 Carsten Gnörlich
# Copyright (C) 2004-2012 Carsten Gnörlich
#
# UTF-8 trigger: äöüß
#
@@ -12,15 +12,15 @@ require("../include/dvdisaster.php");
begin_page();
?>
<!--- Insert actual page content below --->
<!-- Insert actual page content below -->
<h3>The idea behind the error correction</h3>
<h3 class="top">The idea behind the error correction</h3>
<table width="100%">
<tr valign="top">
<td><img src="../images/bad-cd.png"></td>
<td><img src="../images/bad-cd.png" alt="Icon: Damaged medium (partially unreadable)"></td>
<td> </td>
<td><img src="../images/ecc.png"></td>
<td><img src="../images/ecc.png" alt="Icon: Separate file with error correction data"></td>
<td> &nbsp; </td>
<td rowspan="3">
The example from the previous page told us how dvdisaster reconstructs
@@ -36,15 +36,15 @@ That'd really be a cheap shot ;-)
</tr>
<tr>
<td align="right">80%<img src="../images/rdiag-arrow.png"></td>
<td align="right" class="w65x">80%<img src="../images/rdiag-arrow.png" alt="Icon: Diagonal arrow right"></td>
<td> </td>
<td align="left"><img src="../images/ldiag-arrow.png">20%</td>
<td align="left" class="w65x"><img src="../images/ldiag-arrow.png" alt="Icon: Diagonal arrow left">20%</td>
<td> </td>
</tr>
<tr>
<td> </td>
<td> <img src="../images/good-image.png"></td>
<td> <img src="../images/good-image.png" alt="Icon: Complete image"></td>
<td> </td>
<td> </td>
</tr>
@@ -57,18 +57,18 @@ the numbers "8 6 2 3" into a code lock. Since the drawers do not contain
any sensitive information she decides to note down the numbers directly
on the desktop:<p>
<img src="../images/ecc-example1.png"><p>
<img src="../images/ecc-example1.png" alt="8 6 2 3"><p>
Anna is cautious and expects one of the numbers to become unreadable
by accidentally pouring ink over it. Therefore she also notes down
the sum of the four numbers (the "+" and "=" signs have only be added for
clarity):<p>
<img src="../images/ecc-example2.png"><p>
<img src="../images/ecc-example2.png" alt="8+6+2+3=19"><p>
After a while one of the numbers indeed gets covered by an ink spot:<p>
<img src="../images/ecc-example3.png"><p>
<img src="../images/ecc-example3.png" alt="8+&nbsp;+6+2+3=19"><p>
But this is not a problem as Anna can re-calculate the missing
number <i>x</i>
@@ -83,8 +83,8 @@ recovered from the remaining four. The example also demonstrates
some important properties of the error correction:
<p>
<table><tr><td><img src="../images/ecc-example4.png"></td><td>&nbsp;&nbsp;</td>
<td valign="top">
<table><tr><td><img src="../images/ecc-example4.png" alt="8+6+2+3 (medium)=19 (ecc)"></td><td>&nbsp;&nbsp;</td>
<td class="valignt">
For a given set of data (e.g. the numbers "8 6 2 3")
additional error correction data (e.g. the sum "19") can be created
so that a lost datum can be re-calculated from the remaining data.<p>
@@ -122,7 +122,7 @@ which does have such properties; however the required math is not taught
in school. Interested readers are therefore referred to the respective
books in coding theory.
<!--- do not change below --->
<!-- do not change below -->
<?php
# end_page() adds the footer line and closes the HTML properly.