Hi, I just downloaded Intel IPP library for mac os. There are some ipp sample codes. I built the sample application, usc_speech_codec application and ran it. I'm interested in the decoding. I tried to decode GSM 6.10 wave format to PCM. I have a GSM 6.10 wave file(8kgsm.wav) that i downloaded from the web elsewhere. when I tried to run the decoding process:
it complainted that the input file format unknow, "FAIL:Unknown decode format."
However, if I ran the encoder first(using the same usc_speech_codec app), PCM -> GSM 6.10(examplegsm.wav), then decoder GSM 6.10 -> PCM, the decoder will run successful. Why?
When I took the further look, the formatTag embedded inside the header between 8kgsm.wav & examplegsm.wav is different.
formatTag(compression code) value for 8kgsm.wav is 0x0031