1993-02-09 - Compressed/Encrypted Voice using Modems

Header Data

From: Eric Hughes <hughes@soda.berkeley.edu>
To: cypherpunks@toad.com
Message Hash: 9a524cc06168bf7c9f0e0e08d1feb1a0ba93c9eb814c647dd8aff9b22332e13f
Message ID: <9302091713.AA25988@soda.berkeley.edu>
Reply To: <199302081708.AA13952@eff.org>
UTC Datetime: 1993-02-09 17:16:15 UTC
Raw Date: Tue, 9 Feb 93 09:16:15 PST

Raw message

From: Eric Hughes <hughes@soda.berkeley.edu>
Date: Tue, 9 Feb 93 09:16:15 PST
To: cypherpunks@toad.com
Subject: Compressed/Encrypted Voice using Modems
In-Reply-To: <199302081708.AA13952@eff.org>
Message-ID: <9302091713.AA25988@soda.berkeley.edu>
MIME-Version: 1.0
Content-Type: text/plain


Phiber writes:
>Shannon's capacity formula said capacity in bits-per-second equals
>bandwidth of channel in hertz times the base-2 (binary) logarithm of one plus
>the signal (in watts) to noise (in watts) ratio.  

Properly it is the integral of the S/N function over frequency, but that's
a simple continualization of the stated formula.

Eric

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  • 1993-02-08 (Mon, 8 Feb 93 09:09:16 PST) - Re: Compressed/Encrypted Voice using Modems - Phiber Optik <phiber@eff.org>
    • 1993-02-09 (Tue, 9 Feb 93 09:16:15 PST) - Compressed/Encrypted Voice using Modems - Eric Hughes <hughes@soda.berkeley.edu>