>> Can a DM642 (or a DM643) can handle lossy JPEG compression at 1024 x
>> 768,
>> YUV 8 bit 4:2:2, at 30 fps ?
>
> TI have a demo running on a 600MHz DM642 performing 4 simultaneous
> JPEG compressions on D1 images captured from the video ports. I don't
Thanks for pointing this out. So far, I was looking at TI Image library, for
the DFT part, and that was pretty fast.
But then comes zigzag, quantization, huffman encoding...
> DSP memory - video port raw mode/PCI/etc?? You may run out of DMA
> bandwidth before CPU.
Yeah, you're right. Most probably this will be the real bottleneck.
I need to study more deeply the dma engines..
Thanks for your infos!
Reply by Mark Robinson●July 12, 20052005-07-12
Antonio Pasini wrote:
> Can a DM642 (or a DM643) can handle lossy JPEG compression at 1024 x 768,
> YUV 8 bit 4:2:2, at 30 fps ?
TI have a demo running on a 600MHz DM642 performing 4 simultaneous
JPEG compressions on D1 images captured from the video ports. I don't
know how this translates to your problem, but it sounds feasible. One
issue is how you are going to get the uncompressed images into the
DSP memory - video port raw mode/PCI/etc?? You may run out of DMA
bandwidth before CPU.
Cheers
mark-r
--
"Let's meet the panel. You couldn't ask for four finer comedians -
so that answers your next question..."
-- Humphrey Lyttleton
Reply by Antonio Pasini●July 11, 20052005-07-11
Hey all...
Can a DM642 (or a DM643) can handle lossy JPEG compression at 1024 x 768,
YUV 8 bit 4:2:2, at 30 fps ?
Surely can do D1. But SVGA ?
If yes, will it do even at 500 Mhz ?
For example, a Blackfin most probably can't handle that, even the dual core
(from comments from some users).
I know that the data flow itself its a tough job, but I need to start
somewhere...