mpeg4 encoder IC's

Hi,

I am looking for a VGA 15fps+ MPEG-4 encoder IC that is suitable for a
handheld device. The device uses a pxa270 which can apparently do about
11 FPS at 352x288 resolution for mpeg4 encoding in software, but I would
like to use a higher performance low power encoder IC for this instead.
Any links to possible chips? The camera module I am interested in
using is here:
http://sharp-world.com/corporate/news/040916.html

cheers,
Jamie

 

This one is used for various usb2 tv reveivers.
http://www.wischip.com/

MIKE