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From: Carter John-jcarte01 <John.A.Carter@motorola.com>
To: tiff@olympiakos.com
Subject: what to do when a LZW clear code is encountered
Date: Wed, 16 Apr 2003 15:14:02 +0100
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Hi
 
I was wondering
if a clear code (256 dec) is encountered in a LZW compressed strip after retrieving  512 + codes, ie the code length is 10 or greater,
as well as wiping the table for positions 258 and above, should the codes retrieved counter (what's used to determine
when to switch from 9 to 10, 10 to 11, 11 to 12 bit code lengths) also be reset since the table has been shrunk.
I don't think this is explicitly mentioned in the v6 spec
 
thanks jc

____________________________ 

John Carter
BSS O&M Development group,
Motorola,
Mahon Industrial Estate,
Cork. 
Tel:         +353 21 4807 637 (direct)
Fax:         +353 21 4357635  ( reception )
Mobile:  +353 86 3947920
Email <mailto:john.a.carter@motorola.com>   www <http://www.cork.cig.mot.com/~jcarte01/> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

Homer: There's 3 ways to do things, the right way, the wrong  way, and the max power way.
Bart: isn't that  the wrong way.
Homer: yea but faster.

 

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<DIV><FONT face=Arial size=2><SPAN 
class=344100614-16042003>Hi</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN 
class=344100614-16042003></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2><SPAN class=344100614-16042003>I was 
wondering</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=344100614-16042003>if a clear code (256 
dec)&nbsp;is encountered in a LZW compressed strip after retrieving&nbsp; 512 + 
codes, ie the code length is 10 or greater,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=344100614-16042003>as well as wiping 
the table for positions 258 and above, should the codes retrieved counter 
(what's used to determine</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=344100614-16042003>when to switch from 
9 to 10, 10 to 11, 11 to 12 bit code lengths) also be reset since the table has 
been shrunk.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=344100614-16042003>I don't think this 
is explicitly mentioned in the v6 spec</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN 
class=344100614-16042003></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2><SPAN class=344100614-16042003>thanks 
jc</SPAN></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN 
style="FONT-SIZE: 10pt; COLOR: gray">____________________________ </SPAN></P>
<P><SPAN style="FONT-SIZE: 10pt; COLOR: gray">John Carter<BR>BSS O&amp;M 
Development group,<BR>Motorola,<BR>Mahon Industrial Estate,<BR>Cork. 
<BR>Tel:<SPAN 
style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN>+353 21 4807 <STRONG>637</STRONG> (direct)<BR>Fax:<SPAN 
style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN>+353 21 4357635&nbsp; (&nbsp;reception )<BR>Mobile:<SPAN 
style="mso-tab-count: 1">&nbsp; </SPAN>+353 86 3947920<BR><A 
href="mailto:john.a.carter@motorola.com">Email</A></SPAN><SPAN 
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">&nbsp;</SPAN><A 
href="http://www.cork.cig.mot.com/~jcarte01/">www</A><SPAN 
style="FONT-SIZE: 8pt; mso-bidi-font-size: 12.0pt"><?xml:namespace prefix = o ns 
= "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>
<P><SPAN style="FONT-SIZE: 8pt; COLOR: gray; mso-bidi-font-size: 10.0pt">Homer: 
There&#8217;s 3 ways to do things, the right way, the wrong <SPAN 
style="mso-spacerun: yes">&nbsp;</SPAN>way, and the max power way.<BR><I>Bart: 
isn&#8217;t that <SPAN style="mso-spacerun: yes">&nbsp;</SPAN>the wrong 
way.</I><BR>Homer: yea but faster.</SPAN><SPAN 
style="FONT-SIZE: 8pt; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P></DIV>
<DIV>&nbsp;</DIV></BODY></HTML>

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