[music-dsp] tektronix patent (was re: Effective Waveform Visualization)

[David Lowenfels]

Umm... what's the big deal Josh? If the patent was defended in the 
80's, I would guess that it is expired by now. They only last 20 years 
max, right?

-D

On Feb 18, 2005, at 6:13 PM, music-dsp-request at shoko.calarts.edu wrote:

> From: Nigel Redmon <earlevel at earlevel.com>
> Subject: Re: [music-dsp] Effective Waveform Visualisation
> To: music-dsp <music-dsp at shoko.calarts.edu>
> Message-ID: <ec68630ef13260575b37ab6ab8db1a61 at earlevel.com>
> Content-Type: text/plain; charset=US-ASCII; format=flowed
>
> The same problem came up long before waveform editing on PCs--digital
> oscilloscopes. Tektronix did sinc-based bandlimited interpolation long
> ago--they patented the technique (I worked on a patent infringement
> case on their behalf in the 80's, in which they prevailed).