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Altera_Forum
Honored Contributor I
1,811 Views

Asynchronous Sample Rate Converter

I'm looking for ASRC IP. I've gone to every website in the list of Altera IP partners with no luck. Lots of info on the web for ASRC in Xilinx FPGAs... what am I missing?

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8 Replies
Altera_Forum
Honored Contributor I
345 Views

Altera_Forum
Honored Contributor I
345 Views

Thanks for that. I actually stumbled onto that myself, but the trail dead-ended there. Following the various links on that page didn't turn up anything that looked to me like a ASRC IP core. If you can provide further direction, I would be most appreciative.

Altera_Forum
Honored Contributor I
345 Views

You may be able to use a Farrow filter, there is an application note here:http://www.altera.com/literature/an/an347.pdf?gsa_pos=1&wt.oss_r=1&wt.oss=an347 

 

There is also a good article on Farrow filters here: http://www.signumconcepts.com/download/paper018.pdf 

 

Sorry, but I don't know of an Altera IP core for this function but if the Xilinx IP supplier is a 3rd party company they might be able to let you have the VHDL or Verilog which can probably easily be ported to an Altera.
Altera_Forum
Honored Contributor I
345 Views

 

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You may be able to use a Farrow filter 

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Right. Also the above linked Audio Sample Rate Converter block diagram uses it. It's obviously providing asynchronous rate conversion, e.g. 44.1 to 192 kHz. It's part of the AES3/EBU Reference Design, that can be obtained from Altera. Also a reference design for the AN347 farrow rate converter is available. http://www.altera.com/support/refdesigns/sys-sol/wireless/ref-resampler.html 

 

I'm not working in the digital audio business and can't say, if the third party IP utilized by Xilinx possibly has better performance in any regard. But as SingMai suggested, you may want to ask the supplier, if he supports Altera FPGA, too.
Altera_Forum
Honored Contributor I
345 Views

you'll need to file an SR and request the reference design for the audio resampler: 

 

http://www.altera.com/support/refdesigns/sys-sol/broadcast/ref-aes-ebu.html
Altera_Forum
Honored Contributor I
345 Views

Hi, 

 

I looking for the VHDL Source Code for this ASRC. 

Is it availabel anywhere at Altera-site? 

All links on the web-page of these ASRC do not leed to any usable result. 

 

dk
Altera_Forum
Honored Contributor I
345 Views

It's been said: 

 

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you'll need to file an SR and request the reference design for the audio resampler 

--- Quote End ---  

Altera_Forum
Honored Contributor I
345 Views

you may also want to get into contact with your local distributor for help. for what its worth i think the source is Verilog and portions may be encrypted