Hello, I was requested to post a sneak preview of what I've been doing towards Wideband Codec2:
http://0cpm.org/codec2/wideband/ In pointwise summery: * Wideband Codec2 would sample at 12.8 kHz * This utilises the FFT at 512 samples instead of 320 * This enables 10 harmonics on a 600 Hz voice * The wire format is exactly the same as with 8 kHz * Wideband could add more harmonics to high-pitch voices * Sample rate is a local choice, remote can be anything * Connection quality is determined by the lowest sample rate * Code appears to be working, go ahead and play with it The site also contains a preliminary experiment, where I passed an opera voice through Codec2 and ended up with a toad :) Codec2 was not designed for singing at 1 kHz, and I am rather curious if speaking voices ever reach over the dimensioned 600 Hz. The closer they get, the more they would benefit from having a higher sample rate. I hope this is interesting and/or useful. Cheers, Rick van Rein OpenFortress
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