I'm evaluating the sample Intel speech codecs implementation (using the performance primitives) and I find that most codecs work as I expect and indeed give better performance than the alternatives I've looked at. However I find that for AMRWB I cannot decode any 3rd party encoded speech, and similarly I cannot decode Intel encoded speech with a 3rd party decoder. More precisely the decode seems to work and gives a file of approximately the right size, but listening to the results is nothing like the original file. I have tried multiple 3rd party implementations and they seem to work together, but not with the Intel implementation.

I think the most likely reason is I'm doing something wrong invoking the sample code, but I would like to hear from anyone with experience in this area. So with that background - are there any known issues with the Intel AMRWB sample code? Has anyone successfully got it to interoperate with an alternative implementation? Are there any gotchas specific to AMRWB I should be aware of?

Let me know if there's more information that could be of use.

Thanks in advance

Oli

Running Info:

Sample rate - 16000 kHz with 16 bit samples
Modes - various (tried 8850, 23850, 6600 target bit-rate)
RedHat Linux 6.2
IPP-7.0.7
IPP-samples-7.0.7
Processor: Intel Xeon CPU X5690 @ 3.47GHz