15 meter is very long. You cant go to buy cheap one. need to search for branded one that guarantee to deliver full HD.
I think, 15 meter only can transfer 480p or 480i video. Even 8meter, it hard to find cable that deliver full 1080p video.
You can try to search at jalan pasar, and ask them for HDMI repeater or extender.

Do inform us if u found something new.

Some info and recommendation by HDMI Knowledge Base
http://www.hdmi.org/learningcenter/kb.aspx?c=7]http://www.hdmi.org/learningcenter/kb.aspx?c=7
http://en.wikipedia.org/wiki/HDMI


Problem occur with some 15m cable.

http://www.avsforum.com/avs-vb/showthread.php?t=883271
http://nzgeek.org/topic/36969/maximum-leng...r-an-hdmi-cable
http://mybroadband.co.za/vb/archive/index.php/t-191647.html
http://forums.overclockers.com.au/showthread.php?t=783447
http://forums.whirlpool.net.au/forum-repli...cfm/982855.html


This link not just tested between cheap and expensive cable, they also test long and short cable.
http://www.audioholics.com/education/cable...ble-bench-tests

I think the bluejeans cable is the best, cheap and can transfer hi quality data.


This post has been edited by ariff_tech: Jun 8 2010, 11:41 AM

Using a projector should be a problem, most HDMI projecter manufacturer equipped with build-in equalizer circuit to compensate low signal, reduce noise and jitter filtering.

what resolution, refresh rate and color depth u used?