Lowest bitrate speech codecs have rates like 450bps, 700bps (Codec2) and 1600bps... | Hacker News

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		fsiefken on Dec 11, 2019 \| parent \| context \| favorite \| on: Disaster.radio: a disaster-resilient communication... Lowest bitrate speech codecs have rates like 450bps, 700bps (Codec2) and 1600bps (LPCNet) https://github.com/mozilla/LPCNet https://github.com/drowe67/codec2 Conceivably one could reach 39 bps with near-realtime speech, tone, inflection and tempo recognition. Put the result into a zstd compressed SSML stream and perhaps even reach 16 bps. https://stackoverflow.com/questions/46108940/is-there-a-way-...

rini17 on Dec 11, 2019 [–]

If you already carry 39 bps of information efficiently by 39 bps actual bitstream, it's not losslesly compressible. That's by definition. Not even by zstd :)

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