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Matt Mills mmills at 2bn.netMax, Thanks for the update. I have a Phase 2 system that is supposed to go live near me soon, I will attempt to capture and provide some samples with both the control channel and voice channels. Thanks, Matt. On Tue, Feb 4, 2014 at 11:50 AM, <ikj1234i at yahoo.com> wrote: > > > Hi Matt > > > Two things > > > 1. We're currently working on it (as are other groups, AFAIK) - parts of > the Phase II TX/RX code have already been checked into svn and git (look > for the tdma/ directory). At this time the code that is present there > covers the decode and encode processes only partially, and it's more or > less batch-mode only. That is it will generate the set of AMBE voice code > words given a pre-captured file of samples. More work will be needed to > reduce the voice codewords into the voice model parameters so that our > existing IMBE vocoders can work with it. It turns out that both AMBE and > IMBE are distinct front end layers on a common backend which we already > have - this is because both of these codecs are members of the common MBE > family and both use the same speech model with only the parameter > quantization front ends being different. > > > 2. One user has provided some sample captures which have been very useful > - but more samples would help greatly. In particular it would be good to > get samples which contain both the trunk control channel and the dicrete P2 > voice channel at the same time. Further out it would also be good to > obtain captures of the uplink transmissions, which use a different > modulation format. That work is still pretty far off, however... > > > Thanks > > > Max > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/op25-dev/attachments/20140205/d0eea904/attachment.htm>