Broadcast some related data along with the compressed voice
Aztec N
Dear all,
I hope this is the correct forum for asking my question. If not, I hope you have a kind heart to accept my apology. I am new to experimenting with FreeDV. My understanding is that it is a digital voice mode that sends voice across radio frequencies using low-bit-rate speech codecs. However, as it employs digital modulation techniques, it can also be used to send other types of digital data. I want to use this idea in some applications, but as I am not an expert in digital voice, I need someone to confirm my theory before I engage in coding.
I wish to use the FreeDV API in C++ to place a real-time call between two devices. But first, I want to be able to externally encode the voice using codec 2 and then broadcast some related data along with the compressed voice, before modulating the audio using one of the available speech modes. For instance, I could wish to broadcast a burst of two frames. One frame contains the actual compressed voice in six bytes, while the other contains the transmitter and receiver IDs (an additional six bytes of non-speech content). Is this feasible?
Aztec
Mooneer Salem
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Aztec N
Thank you very much for sharing your thoughts. I'm hoping the others would also add more insightful comments.