Hi Wully, Yes, in the future the FreeDV API interface for 700 mode will be changed to 8000 Hz. Two people have kindly volunteered to work on a 8000<->7500 conversion function, so it will hopefully be fixed in the next few months.
For now, I am using libresample in the FreeDV GUI program. Take a look at the resample function in fdmdv2_main.cpp, in fdmdv2-dev. FB on putting FreeDV into your SDR. Could you pls post a link to your SDR here for others to enjoy? Cheers, David On 12/08/15 05:17, wully wrote: > Hello David > > I have downloaded the branch 0.4 from your SVN and could easily build > all things. The tests also run nicely. > > Now, I would like to implement the new 700-mode: A year ago, I > implemented the 1600-mode directely into my SDR code using your shared > library and made quite some qso with it. Since hpsdr is using 48kS/s, I > have downsampled to the 8kS/s used with the codec2. (and upsampled when > in RX). > > Now, for the 700 mode, I have to make the rate conversion from 48000 to > 7500 and back. I have looked into the resample-1.8.1. To use this > filebased code in a continuous buffer mode, seems to need quite some > adaptations. (It does not yet look to me as my friend, hi). > > It seems to me, that in the freeDV-code there must be also such a rate > conversion. Probably, there is some code there, which can easily be > adapted to the needs for buffer modes. > > Can you recommend something, or do I have to use the resample-1.8.1? > > If necessary, I will try to recode the resample-1.8.1, so that finally > one could add it to the freeDV interface, so that all kinds of > resamplings can be used in shared libraries (just by specifying the > input/output sampling rates). > > Thank you in advance for your advice. > > Alfred, hb9epu > > ------------------------------------------------------------------------------ > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
