[digitalradio] Re: P25 or D-Star Software
I stand corrected! The software came out yesterday, and it is now possible to demodulate D- Star with a soundcard. If you have the DVSI dongle, you'll be able to recover audio. Amazing! http://groups.yahoo.com/group/dstarsoftware/message/1
[digitalradio] Re: P25 or D-Star Software
--- In digitalradio@yahoogroups.com, "mikenetbot" <[EMAIL PROTECTED]> wrote: > > Currently, no. The modem part of P25 and D-Star(in the C4FM mode) aren't too > challenging, so those should be able to be done in software(although P25 is known to > need a CLEAN discriminator tap on receive, something many scanner users realized they > didn't have when trying to decode P25 trunking data). The hard part is the vocoder. > Actually getting audio in and out of the datastream requires licensing a proprietary > codec(VERY expensive, some have claimed that the price of P25 equipment is dominated > by the vocoder license), or using a proprietary IC. P25 and D-Star use similar vocoders(in > fact, those in the know have suggested that the same IC may be able to handle both > systems, even though the literature doesn't mention it). Recently, a DVSI vocoder dongle > that interfaces the vocoder IC to a PC has become available, so it's likely this problem will > be solved soon. If it is interfaced with some modem software, a software solution will > likely be possible. > > Check out the vocoder dongle here: > http://www.moetronix.com/dvdongle/ > > > --- In digitalradio@yahoogroups.com, "Gmail - Home" sparcnz@ wrote: > > > > Hi All, > > > > Know this may be a stupid question, but going to ask anyway. > > > > The two digital modes for voice are P25 and D-Star? > > These a built into the radio, so is there any computer software that allows one to use > the mode? > > > > Thanks > > > > Kevin, ZL1KFM. > > > > Get Skype and call me for free. > > >
[digitalradio] Re: P25 or D-Star Software
Currently, no. The modem part of P25 and D-Star(in the C4FM mode) aren't too challenging, so those should be able to be done in software(although P25 is known to need a CLEAN discriminator tap on receive, something many scanner users realized they didn't have when trying to decode P25 trunking data). The hard part is the vocoder. Actually getting audio in and out of the datastream requires licensing a proprietary codec(VERY expensive, some have claimed that the price of P25 equipment is dominated by the vocoder license), or using a proprietary IC. P25 and D-Star use similar vocoders(in fact, those in the know have suggested that the same IC may be able to handle both systems, even though the literature doesn't mention it). Recently, a DVSI vocoder dongle that interfaces the vocoder IC to a PC has become available, so it's likely this problem will be solved soon. If it is interfaced with some modem software, a software solution will likely be possible. Check out the vocoder dongle here: http://www.moetronix.com/dvdongle/ --- In digitalradio@yahoogroups.com, "Gmail - Home" <[EMAIL PROTECTED]> wrote: > > Hi All, > > Know this may be a stupid question, but going to ask anyway. > > The two digital modes for voice are P25 and D-Star? > These a built into the radio, so is there any computer software that allows > one to use the mode? > > Thanks > > Kevin, ZL1KFM. > > Get Skype and call me for free. >
