I want to speed up jpeg decoding in i.MX RT

[Ryo_Aoki]

Hi community.

I need faster JPEG decoding on i.MX RT1170 EVK.
I measured the jpeg decoding time of the sample software sd_jpeg_cm7.

It uses 23msec to decode a 480x272 jpeg image, but I would like to speed this up.
The request requires about a 3x speedup. Do you have any ideas?

Best regards.

[kerryzhou · Accepted solution]

Hi @Ryo_Aoki ,

  Thank you for your interest in the NXP MIMXRT product, I would like to provide service for you.

  About the decoding, you can refer to this application note:

https://www.nxp.com/docs/en/application-note/AN12562.pdf

It contains some performance information.

  So,if you want to speed up, I think, you can copy the code to the internal TCM or OCRAM, it will faster than the external flash running result.

Wish it helps you!

If you still have question about it, please kindly let me know.

Best Regards,

Kerry