[EMAIL PROTECTED] wrote:
>
> * <[EMAIL PROTECTED]> on Mon, 01 May 2000
> | Actually, you will find that digital cellular systems virtually
> | universally use lossy compression for the voice. GSM for sure does, and
> | most others I have seen do.
>
> Actually, no, they don't. This comes straight from a guy who co-wrote the
> Sprint PCS software (he is now my co-sysmonster). The FCC does not allow
> compression or encryption; all civilian aerial broadcasts must be clear.
> The lossy compression you describe is achieved by ratcheting back the
> sampling frequency rate to concentrate on the baritone and tennor ranges,
> ignoring the bass and alto ranges entirely.
May I have a big laugher here!
GSM is compressed and encrypted. Each GSM network uses another encryption/
decryption methode. It's part of the GSM standard. Ever heared of DECT?
It's the wireless phone equivalent of GSM. It also uses compression and
encryption.
Cheers,
Ralph -> or do you want everybody with a scanner to listen to your private
conversations?
--
=======================================================================
Ralph Smeets Functional Verification Centre Of Competence - CMG
Voice: (+33) (0)4 76 58 44 46 STMicroelectronics
Fax: (+33) (0)4 76 58 40 11 5, chem de la Dhuy
Mobile: (+33) (0)6 82 66 62 70 38240 MEYLAN
E-Mail: [EMAIL PROTECTED] FRANCE
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"For millions of years, mankind lived just like the animals. Then
something happened which unleashed the powers of our imagination:
We learned to talk."
-- Stephen Hawking, later used by Pink Floyd --
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