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Digital Voice Decoding Software For discussion of software applications which decode digital voice formats such as P25, NXDN, MotoTRBO, etc. Please use the HF Digital Signals forum for anything below 30MHz.

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Old 02-25-2014, 12:37 AM
Join Date: May 2002
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Default CPU power needed for DSDPlus

What cpu power needed to decode n smoothly DSDPlus with RTLSDR dongle ? on a notebook ?
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Old 02-25-2014, 2:16 AM
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Join Date: Apr 2005
Location: Las Vegas, NV
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Can't speak for anything less than a Core 2 Duo (P8700 @ 2.53 GHz here) but when I'm doing a decode with DSD+, be it P25/DMR/MOTOTRBO/NXDN/etc, I see the decoder using 5-8% CPU and that's in situations with both slots/channels being decoded for voice content simultaneously; one slot/channel is about 4-5% typically, and this is with SDR# providing the audio signal. If you're just using a true discriminator tap to DSD+ I'd guess it should be about the same without the overhead of the SDR program on top.

I've seen reports from other people that use DSD+ with Atom-powered Netbooks without issues so it may work just fine with those, I just don't own such hardware for testing purposes. I have an older Pentium-M laptop around here someplace but I don't use it much anymore, could break it out and copy over my SDR# folder (where all my SDR-related stuff is located) and do some testing if needed, but I'd hazard to guess it would still be able to handle it just fine.

If you're using such a machine for multiple things at the same time then obviously it won't do as well, but dedicating a Netbook for decoding purposes alone should be workable. Any CPU made in the past 4-5 years should easily be able to handle DSD+ without issues (Intel Atoms and AMD Zecate APUs, low end Intel Celerons and Pentiums, AMD APUs, etc).
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Old 02-25-2014, 3:22 PM
Join Date: Dec 2005
Posts: 203

Can confirm that I can run multiple instances of DSD+ easily on a Intel Atom N450 1.66GHz running WinXP, but that's running with a tapped scanner as input, not a dongle.

DSD performance on this same netbook wasn't great when running on WinXP, but worked perfectly running ubuntu.

Anybody have any experience of running DSD+ on a windows tablet running Win 8 or RT? I could see that working well out and about with a scanner/usb sound card.
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