Lpc2000

I'm looking for an optimized JTAG decoder built for fixed-point ARM7.
Is there such a thing, and where do I go look?  Or, is there a
compression standard other that JPEG that gives similar compression with
less CPU bandwidth from a fixed-point CPU like ARM?

I'm using the IJG JPEG decoder, which is excellently written and highly
portable.  Unfortunately, I need about 8X more speed.  I'm going to a
faster CPU with more RAM, but I think it will ultimately take something
more (faster algorithm or implementation) to make everyone happy.

Any advice or insight is greatly appreciated.

Thanks.