Rash

Hello, I wasn't aware of this development - this is very interesting indeed! It's probably better to focus on this encoder rather than FDK-AAC. R On Thu, 7 Mar 2024, 16:25 Rafael Diniz, rafael2k@users.sourceforge.net wrote: I would also consider libxaac, which explicitly mentions DRM: https://github.com/ittiam-systems/libxaac It supports many object types, including HE-AAC and USAC (xHE-AAC). USAC is also supported in DRM (thou the super-framing is a bit different in order to allow "abr" framing)....

Hi Sam, Apologies - I don't really know enough to be much help. You should probably look at this repo instead of the one I previously pointed you at, because I think the fdk included is much more up to date: https://github.com/Opendigitalradio/ODR-AudioEnc/tree/master You can also look at the ODR-AudioEnc source to see how FDK-AAC is interfaced for DAB+. All of the DRM related bits have been stripped out of FDK-AAC, which is probably the source of your error? So I suspect you'd need to call it as...

Hi Rafael, That's a good point! I don't know enough to be certain that it would, but If someone does plug FDK in, I would be happy to carry out tests against a DRM codec that does have ER. I don't have a suitable channel simulator, so only 'conducted' measurements to several different receivers (e.g. a Coding Technologies portable) via a variable step attenuator, but it should be adequate for quantifying how valuable ER is. R

Hi, I just wandered by to answer a question about FDK and spotted this topic - I have a couple of (Edit: well, three) suggestions: Add a raw IQ UDP output like Spark and the AlgoKorea Windows transmitter (which I've not used, but it doesn't half look like DReaM!) This would be nice for a few obvious reasons. One very cool one is it enables an FL2000 VGA adapter to be used as a 0-150 MHz DRM signal source by using the Osmocom FL2K library with an IQ modulator tool that's on Github. Apply a raised...

Hi, I just wandered by to answer a question about FDK and spotted this topic - I have a couple of suggestions: Add a raw IQ UDP output like Spark and the AlgoKorea Windows transmitter (which I've not used, but it doesn't half look like DReaM!) This would be nice for a few obvious reasons. One very cool one is it enables an FL2000 VGA adapter to be used as a 0-150 MHz DRM signal source by using the Osmocom FL2K library with an IQ modulator tool that's on Github. Apply a raised cos filter for the IQ...

Hi Sam, You won't believe how painful it was to sign up here, just to answer this question. The captcha was being ridiculous! The answer is 'yes'...however, it's not a slam dunk! An OpenDigitalRadio colleague patched FDK for 960 transform so it can be used as a DAB+ encoder, however DRM30 uses the Error Robust (ER) AAC Scalable object type (ID = 20) High Quality Audio Profile and FDK doesn't have this profile. It's here anyway: https://github.com/Opendigitalradio/fdk-aac And good luck! R