On 06/02/2012 11:58 AM, David Rowe wrote:
Steve - I doubt any Self/Codebook excited Linear Prediction type codec (which I presume the SELP in PSELP stands for) could work at 2.4 kbit/sI Googled "Iridium Codec" and this came up: DVSI AMBE-2020™ www.dvsinc.com/products/a2020.htmCached - Similar You +1'd this publicly. UndoThe AMBE-2020™ Vocoder Chip is a low cost, DSP-based voice codec for ... Satellite systems such as Iridium, ICO, Inmarsat, Thuraya, ACeS, Optus and ... - David On Sat, 2012-06-02 at 21:46 +0800, Steve Underwood wrote:On 06/02/2012 05:01 PM, Ed W wrote:- Iridium is not clear on codec. They certainly have data channels of a touch under 3.5kbit before framing, and a user data channel is 2.4kbit + FEC. I would guess that like the mini-M they use a 2.4Kbit+FEC AMBE codec.I don't know if they changed, but the original spec for Iridium used a codec called PSELP at 2.4kbps. Iridium came from Motorola's defence group, and a lot of what they did reused things developed for the military. I believe PSELP was among those things. Steve ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
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