Hi list,
I'd like to hear the effects of only playing back unvoiced frames from a
decoded stream, but can't figure out how to do this from the code. Can
anyone give me any hints on how to do this?
There is a rationale behind this. I listen to DAB radio in my car, and
twice in the last two weeks the stream has become corrupted somehow. I
*think* that voicing information was being dropped but unvoiced information
was being played. The effect was quite scary to listen to - it sounded
like someone evil in a cheap sci-fi was talking. However the speech was
perfectly intelligible. I'd like to know if the same is true with Codec2.
I've got some code hacked together to add a simple CRC8 checksum to every
48 bits of data. My plan is to use this to send 1200bps Codec2 data over
the FDMDV modem with some error detection/correction, but this leaves the
problem of what to do with uncorrectable errors. The first thing I'd like
to try doing is playing the uncorrected unvoiced frames and dropping the
uncorrected voice frames - my gut feeling is that this has a chance of
still being intelligible even if it's not very pleasant to listen to.
Regards,
Dan MD1CLV
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