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It is however possible to develop a open source, free-as-in-speech codec with similar performance at similar bit rates. What's the issue with AMBE? Codec2 developer David Rowe, VK5DGR talks about this on his blog: - 'Due to patents and the amount of confidential information surrounding these codecs (AMBE) I don’t think it is possible to make an open codec compatible with these closed codecs.
#AMBE CODEC SOFTWARE#
It's advocates include Bruce Perens, K6BP, () who is well known in open source software circles, and is a huge Free Software advocate. This open voice codec is called Codec2, and is in a highly experimental stage at this current point. Development on an open source, freely available alternative to AMBE has been spearheaded by Australian amateur David Rowe, VK5DGR. However, the AMBE voice encoding scheme currently used by the DSTAR protocol is not open, rather it is patented by DVSI, Inc. Open Source DSTAR Voice - Codec2: from KE7HQY on JThe DSTAR protocol is open and freely available, developed by the Japanese Amateur Radio League (JARL). By the way, what's the best 'channel' to contact Bruce? The google digital voice group is a good public channel: Else email: bruceperenscom.
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Best guy to ask is Bruce Perens I'd like to see this patent analysis he has. Is different and i didnt' open the die of the chip to get access to the functions inside (is not even necessary anyway.) and at the same time i didn't steal the source code, because is not public.
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Hi, but is there a way to do a similar job without copying the core of the original AMBE DSP? I mean, if i encode a 'bad' signal similar to what could be obtained trough the AMBE and compatible with DStar radios, why they would sue me? I wish we had an open vocoder to play with. They have nothing to do with each other in reality. Retailer Circuit City Actually, its just an unfortunate coincidence that they used the same name. >was actually an attempt by the now defunct U.S.
#AMBE CODEC LICENSE#
Of one AMBE/MELP license a lot of Codec 2 development can be sponsored. Use SDR software and hardware that supports FreeDV. DVSI's patented AMBE® voice compression software has been proven. Digital Voice Systems, Inc.is a world leader in the. I've been thinking about the possiblity of replacing the AMBE codec with a CODEC2 on the tytera.