On 10/24/2012 07:31 AM, Kristoff Bonne wrote:
> Hi,
>
>
>
>
> - voicing bits (4 bits)
> - energy+Wo bits (16 bits)
> - VQ (27 bits)
> - spare bit (1 bit)
Given what Jean-Marc wrote about the first VQ index, it probably rates
higher than energy.
> Maybe I don't understand. Are you laboring under the misconception
> that FEC must duplicate the data? Convolutional codes, even such old
> things as CRC, will expand the data at less than a 1:1 ratio. I think
> you can assume that we're using a more modern code like LDPC or turbo
> codes.
> Remember that we are using golay and hamming, because of the
> availability of open source code and we are pretty sure there are no
> patents applied here. Bill can probably elaburate better on that.
Golay and Hamming are easy to use for a fast way to get on the air, but
when we set a standard for other hams to use it should be based on a
capacity-approaching code. LDPC is available for us to use without
patent issues today.
Thanks
Bruce
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