On 11/01/2011 02:42 PM, Kristoff Bonne wrote:
> I know this is a bit dangerous discussion as there are some people who
> think that other (non-D-STAR compatible) DV modes would hinder the
> further growth of D-STAR.
In this case, what's only arguably bad for D-STAR is clearly good for
Amateur Radio. We need to be in control of our protocols and codecs.
> So what I want to experiment is creating a DV-mode (NOT D-STAR and
> called D-STAR), using roughly the frame-structure of DV D-STAR; but on
> purpose NOT compatible with it. (e.g. by inverting all the bits in the
> field-check error part of the header or using a different scrambling
> system or something like that)
Please try to figure out a format that D-STAR repeaters and gateways
will carry, but which doesn't decode as the stock D-STAR voice. The goal
would be for the packets to get to all possible sites, but for those
sites to stay silent if they aren't equipped to decode it.
> The goal is to make sure that D-STAR radios do ignore these streams
> and not try to decode it (I do not want to have angry D-STAR people
> tell me I crashed their radio because the firmware tried to decode the
> stream and crashed on it. :-) )
We can eliminate the formats that crash existing radio firmware through
experimentation. I know that the state of embedded programming in these
devices is awful, but they really should not crash at all.
Thanks
Bruce
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