Re: [Freetel-codec2] Codec2 vs. RALCWI

2013-08-20 Thread Kristoff Bonne
Andy, On 20-08-13 17:29, Andy Wood wrote: (...) > All the Chinese manufacturers seem to be getting a bit excited about > it for some reason... > DMR/Mototurbo seems a much better bet than dPMR ;) The problem with DMR is that is TDMA multiplexing two signals in one 12.5 Khz channel. This means

Re: [Freetel-codec2] Codec2 vs. RALCWI

2013-08-20 Thread Gullik Webjörn
Hi all, It seems I woke the list up a bit :-) I just read the ETSI specs, and could see that there is provision for four codecs, (only) bit encoded in two bits. These are specified as AMBE+2, Chineese-yet-to-be-named, RALCWI, and "manufacturer specified". It would be interesting to "grab" that po

Re: [Freetel-codec2] Codec2 vs. RALCWI

2013-08-20 Thread David Rowe
Well I'd suggest Codec 2 is "communications quality", not "toll quality". Toll quality means uncompressed A or mu law PCM, g279 etc. I some one wants to compare for some samples of RALCWI and encode the same source material with Codec 2. - David On Tue, 2013-08-20 at 08:23 -0700, Bruce Perens

Re: [Freetel-codec2] Codec2 vs. RALCWI

2013-08-20 Thread Andy Wood
to be getting a bit excited about it for some reason... DMR/Mototurbo seems a much better bet than dPMR ;) Andy. > Date: Tue, 20 Aug 2013 17:12:02 +0200 > From: gullik.webj...@corevalue.se > To: freetel-codec2@lists.sourceforge.net > Subject: [Freetel-codec2] Codec2 vs. RALCWI &

Re: [Freetel-codec2] Codec2 vs. RALCWI

2013-08-20 Thread Bruce Perens
They claim "near toll quality" at 2400 Baud without the FEC, 3600 with. We claim toll quality at half that rate. From a short look, it appears you have to buy their chip. We accomodate having the algorithm in your main processor as long as you give us some means to reflash it. Thanks

[Freetel-codec2] Codec2 vs. RALCWI

2013-08-20 Thread Gullik Webjörn
I do not really want to swear inthe church, but here goes: Has anyone compared codec2 vs. RALCWI? I understand RALCWI is a waveform codec rather than a "human voice" modelling, but do you have any subjective views on this? The emerging dpmr standard seems to have AMBE+2 and RALCWI as supported c