Re: [Svxlink-devel] EchoLink + Speex
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From: Tobias B. <sm...@us...> - 2010-03-20 10:14:27
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On Friday 19 March 2010 11.40.34 st...@ar... wrote: > Hi Tobias, > > just to inform you, the following message has been sent to the EchoLink > support: > > Through this message I'd like to inform you, that the SvxLink software. an > alterative implementation of the EchoLink protocol for Linux, is going to > support the Speex audio codec for RTP audio connections. RTP payload type > will be set to 0x96 (user defined), codec parameter values are transfered > in-band, no further changes apply to the RTP packet format, except that > data section contains a larger block (higher data rate). Backward > compatibility is assured through explicit transcoding as required > (especially when different system types are connected simultaneously). The > main reason of this message is a coordination of a signaling message, that > is embedded in a SDES NOTE or SDES PRIV packet format indicating the Speex > codec capability. Currently, we send a SDES NOTE packet whth a text > "SvxLink", but this is probably not what you'd prefer if you'd plan also > to extend the Windows EchoLink software one day. Implementation detail > will be made public soon on svxlink.sourceforge.net. vy 73s de Steve, > DH1DM Great initiative to try to coordinate development with the EchoLink team! Any answers yet? 73's de SM0SVX / Tobias |