high speed JPEG encoding on DSP

There are three options I can think of

1) Get 270 MHz version of DM355; I believe this are hard to come by, but some customers are getting them so it does not hurt to try.  A big plus is that you are already familiar with this platform.

2) use DM365 instead; DM365 is the next generation of or DM3x family and is available at two speeds (270 MHz and 300 MHz), see product folder for more details. http://focus.ti.com/docs/prod/folders/print/tms320dm365.html

3) use DM6467; this is our most powerful digital media processor at the moment and contains two image coprocessors (most of our other platforms contain one).  However, it is more expensive and probrably a bit more complex to program (has ARM, DSP, whereas DM355 and DM365 only have an ARM and no DSP).  I would only consider this as a last option.

Thanks Juan. As I know, on DM355, JPEG encoding process is done by Co-processor, and MJCP is working at 200MHz. Does the MJCP in DM355 270MHz work at a higher speed? Then why 270MHz DM355 may get a higher JPEG encoding speed? Will you please explain that :)

I agree with you! The speed of JPEG encoding  depends on the speed of co-processor!

When using other processor such as 647/648, the pictures are encoded by DSPs, so you need to read the parameters of JPEG encoders listed at http://focus.ti.com/dsp/docs/dspsupporto.tsp?sectionId=3&tabId=1460!