Hi David, > I haven't checked out yr patch (as I am trying to stay focussed on the > 1400 bit/s work) so I don't fully understand exactly what you have > changed.
No problem. > However from reading yr posts above you are proposing changing the > sample rate to 12.8 kHz, while keeping the frame rate constant? Yes, the sample rate would be a local choice. I expect better performance for high-pitch voices, but no additional refinement on lower ones. > I'd be > tempted to scale some constants (e.g. N, NW, MAX_AMP & M in defines.h) > so that they are the same length in ms at the new sample rate and see > how that sounds on some wideband input samples. I did not touch NW, will look into it. I didn't change MAX_AMP in light of not changing low-pitch voices. I also changed P_MIN, P_MAX and... FS :) Furthermore, I scaled the nlp_fir filter (keeping it at 600 Hz). > I'd test the unquantised codec using c2sim at the 10ms frame rate first > to make sure that sounds OK and nothing is broken. You could then try > LPC modelling with different LPC model orders. OK, thanks. -Rick ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
