RE: Digitální intercom (dekodér hlas <> sériová linka) ?

[Naprstek, Jiri]

Mozna mi neco zasadne nedochazi, ale ISDNku staci 64kbit (8bit x 8kHz) bez jakekoliv komprese, nebo rekneme s nejaky logaricmickym kompanderem, ktery se da realizovat tabulkou (ma-li jednocip vic nez 8bit A/D). IMHO do zminovanych 70kbps fullduplex se vejde jeden kanal nekompreseneho hlasu i se signalizaci a to pri minimalni vypocetni slozitosti (8bit 1chip musi stacit). Na co MP3?

Jiri N.

> -----Original Message-----
> From: hw-list-bounces@list.hw.cz [mailto:hw-list-bounces@list.hw.cz]On
> Behalf Of Marek Sembol
> Sent: Wednesday, March 22, 2006 9:32 AM
> To: HW-news
> Subject: Re: Digitální intercom (dekodér hlas <> sériová linka) ?
> 
> 
> Atmel ma nekde u AVR AN na tema "digi-diktafon", jen misto ukladani do
> flash by se to posilalo po seriovce.
> Marek
> 
> On 3/22/06, LuKas <Hradlo@atlas.cz> wrote:
> > Zdravim!
> >
> > Rád bych si postavil malý digitální intercom. Představuju 
> si to tak, že bych repráček a mikrofon připojil k nějakému 
> broukovi, ktery by mel jako vystup seriovou linku. Tu bych 
> tahal po RS422, případně přes Ethernet. Vzdálenost je tak 
> 50m. Rychlost sériové linky by  měla tomu broukovi stačit do 
> 460 kBd. Stačí half duplex (jako vysílačka - mluví vždy jen 
> jedna strana - i když obousměrně by to bylo prima :-) ).
> >
> > Je reálné tahat takhle hlas nebo je to blbost ... ?
> >
> > LuKas
> >
> > PS: Mám to domu, tak by to mělo mít přiměřenou cenu :-)
> > ---------------------------------------
> >
> > hry.atlas.cz - šachy, piškvorky, sudoku a další hry online
> >
> >
> > _______________________________________________
> > HW-list mailing list  -  sponsored by www.HW.cz
> > Hw-list@list.hw.cz
> > http://list.hw.cz/mailman/listinfo/hw-list
> >
> _______________________________________________
> HW-list mailing list  -  sponsored by www.HW.cz
> Hw-list@list.hw.cz
> http://list.hw.cz/mailman/listinfo/hw-list
> 
-- 

This e-mail and any files transmitted with it are confidential and intended
solely for the use of the individual or entity to whom they are addressed.
If you have received this e-mail in error please notify the sender immediately
and delete this e-mail from your system.  Please note that any views or opinions
presented in this e-mail are solely those of the author and do not necessarily
represent those of Ricardo (save for reports and other documentation formally
approved and signed for release to the intended recipient).  Only Directors
or Duly Authorised Officers are authorised to enter into legally binding
obligations on behalf of Ricardo unless the obligation is contained within
a Ricardo Purchase Order.

Ricardo may monitor outgoing and incoming e-mails and other telecommunications
on its e-mail and telecommunications systems.  By replying to this e-mail you
give consent to such monitoring.  The recipient should check this e-mail and
any attachments for the presence of viruses.  Ricardo accepts no liability for
any damage caused by any virus transmitted by this e-mail.  "Ricardo" means
Ricardo plc and its subsidiary companies.

Ricardo plc is a public limited company registered in England with registered
number 00222915.
The registered office of Ricardo plc is Shoreham Technical Centre, Shoreham-by Sea,
West Sussex, BN43 5FG.