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Altera_Forum's avatar
Altera_Forum
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15 years ago

Mp3 decoder too slow on NiosII

Hi,all I'm now designing a mp3 player for DE2 board, which use libmad for mp3 decoding. But currently, the speed is too slow for real time playing. The core is NiosII fastest core,i cache=8kb, ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I recommend tuning the system clock back to find out how much slack you have. For example I wouldn't rely on it being 'realtime' if it fails to keep up if you drop the frequency 10%. Also -O2 should give you better performance.