[Asterisk-Dev] G.722 and Grandstream

Wolfgang S. Rupprecht list+asterisk-dev at lists.wsrcc.com
Mon Mar 21 16:34:16 MST 2005


asterisk at ntplx.net (Andrew Lindh) writes:
> In my quick test I recorded a G.722 audio stream (just from the dialplan
> record function) and I can play it back to the phone (from the dialplan).
> When I use an external G.722 audio encoder/decoder I don't get valid audio
> from the conversion. So my big issue is I don't have G.722 codec code and
> information that matches the G.722 on the BT-100 phone....

Could it be a bit-numbering problem?  (eg. Where ITU does something
screwy like labeling the 0x80 bit as "bit-0"?)  I recall that
bit-flipping and byte-flipping was a reoccurring theme with early
communication programs.

-wolfgang



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