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 position, at least for HAM use, i.e. get ONE codec that could be implemented and WOULD interoperate. If some commercial company decides to use that encoding for *another* codec, then HAM equipment will not interoperate with that, but, so be it. At least a proposal should / could be made. The mechanism of CML chipsets seems to indicate how interfacing a vendor codec = (Codec2 for HAM use) can be done. It would be interesting to understand how other chipsets are provisioned. I have only spent an hour on this. Also, from an interop view, it would be interesting to (be able to) "tunnel" codec2 streams between HF and VHF/UHF, and thus provide an unbroken stream end to end. Gullik On 08/20/2013 10:19 PM, David Rowe wrote: > 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 wrote: >> 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 >> >> Bruce >> >> >> On 08/20/2013 08:12 AM, Gullik Webjörn wrote: >>> 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 >>> codecs, plus "The chineese codec (not decided yet)", and a forth option for >>> yet another codec specified by manufacturer. I see codec2 here. :-) >>> >>> SM6FBD >>> >>> ------------------------------------------------------------------------------ >>> Introducing Performance Central, a new site from SourceForge and >>> AppDynamics. Performance Central is your source for news, insights, >>> analysis and resources for efficient Application Performance Management. >>> Visit us today! >>> http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk >>> _______________________________________________ >>> Freetel-codec2 mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >> >> ------------------------------------------------------------------------------ >> Introducing Performance Central, a new site from SourceForge and >> AppDynamics. Performance Central is your source for news, insights, >> analysis and resources for efficient Application Performance Management. >> Visit us today! >> http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk >> _______________________________________________ >> Freetel-codec2 mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > > ------------------------------------------------------------------------------ > Introducing Performance Central, a new site from SourceForge and > AppDynamics. Performance Central is your source for news, insights, > analysis and resources for efficient Application Performance Management. > Visit us today! > http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ------------------------------------------------------------------------------ Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
