30 May
2017
30 May
'17
3:43 a.m.
Holger Freyther holger@freyther.de wrote:
Yes UC-20, with 40ms (according to the documentation not 20ms!) of audio at a time. I have used gstreamer with the filebin to send audio and cat+ audacity to receive it.
What exactly are the bits which you send and receive every 40 ms? Do you get two 260-bit GSM 06.10 codec frames every 40 ms, with the ability to send your own arbitrary bits into the TCH uplink, including the possibility of passing non-speech data over voice TCH if the network does TFO as in GSM 02.53? The latter is what the Calypso DSP allows.
M~