<br><div class="gmail_quote">On Jan 21, 2008 1:05 PM, Tomas Carnecky <<a href="mailto:tom@dbservice.com">tom@dbservice.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d">Jean-Pierre MORARD wrote:<br>> Dear all,<br>><br>> "There are 14 video-oriented instructions for accelerating subpixel<br>> filtering, search, and 4x4 SAD (sum of absolute differences—a
<br>> performance-critical part of H.264 encoding)" - source:<br>> <a href="http://arstechnica.com/news.ars/post/20070417-intel-details-penryn-performance-sse4.html" target="_blank">http://arstechnica.com/news.ars/post/20070417-intel-details-penryn-performance-sse4.html
</a><br>><br>> Is there already someone working on that optimization ?<br><br></div>I don't think so, but search the archives, IIRC there have been some<br>discussions about the advantages/disadvantages of sse4.
<br><br><a href="http://mailman.videolan.org/pipermail/x264-devel/2008-January/003955.html" target="_blank">http://mailman.videolan.org/pipermail/x264-devel/2008-January/003955.html</a><br><br>tom<br>_______________________________________________
<br>x264-devel mailing list<br><a href="mailto:x264-devel@videolan.org">x264-devel@videolan.org</a><br><a href="http://mailman.videolan.org/listinfo/x264-devel" target="_blank">http://mailman.videolan.org/listinfo/x264-devel
</a><br></blockquote></div><br><br>According to this<br><br><a href="http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3195&p=4">http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3195&p=4</a><br><br>
Intel's Penryn provides nice speedup in DIVX and TMPG encoding.<br><br>-- <br>Bart<br>