Geez. Most vacation programs are smart enough *not *to reply if your name
doesn't appear in the To: address.
On Sun, Apr 2, 2017 at 10:54 PM, Sergei Lebedev <[email protected]> wrote:
> Dear Jeroen Vreeken,
>
> I'am out of office from March 24 to April 03, 2017.
> All your messages will be proceeded as soon as possible.
> Please forward your urgent requests to:
> +7 (812) 644-0430 #1290
>
> Sorry for inconveniences.
> Sergei Lebedev mailto:[email protected]
>
>
>
>
> Уважаемый Jeroen Vreeken,
> Моя почта работает в режиме автоответчика.
> Меня не будет в офисе c 24 марта по 03 апреля; я отвечу на Ваше письмо как
> только смогу сделать это.
> По срочным вопросам прошу Вас звонить:
> (812) 644-0430 доб.1290 - Вам ответят мои коллеги.
>
> Простите за неудобства,
> Сергей Лебедев mailto:[email protected]
> ph: (812) 644-0430 (добавочный 1290 )
> fax: (812) 497-3682
> =========================================
>
> Saturday, April 1, 2017, 4:02:30 AM, you wrote:
>
> > I use a similar trick when I mix voice and data in FreeDV mode 2400B.
> > But the detection is a bit simpler: Just look at the 'energy'
> component of the vocoder.
> > If the energy of a frame is low and there is data to send the data
> > will be send and the receiver will inject a bit of silence.
>
> > Regards,
> > Jeroen
>
>
> > On 04/01/2017 01:43 AM, Steve wrote:
> >
> >
> > I was playing with the pairphone modem, and it dawned on me
> > that the software was using this modem to send both vocoder
> > data and control data. It did this based on the boolean bit
> > for VAD. Well, that's probably not novel, but I asked
> > myself, how the heck could they know when the vocoder output was
> speech or noise??
>
> >
> > Well, it turns out that there is an algorithm just for that
> > purpose. It looks at each vocoder frame and a little history
> > and bada-boom youse gotta VAD bit.
>
> >
> > I was trying to figure out how they squeezed all the
> > encryption information and voice into 1200 bit/s, if the voice
> > itself was 1200 bit/s! Aha, they look for breaks in the voice and
> send control bits instead.
>
> >
> > I suspect there are quite a few frames with no voice. If a
> > person was looking up something, they might not say anything
> > while they were otherwise tasked. This probably results in an
> > excess of control information. Dumb data just to fill the void.
>
> >
> > They almost need something like a duration detector, and
> > then send text data. A private SMS below the voice and control.
>
> >
> > Have a good weekend,
> > 73/steve
>
> >
> >
>
> >
> >
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> >
> >
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