There also was a Miller Squared code as well. I believe one of the big
deals with these codes were that they were self clocking. Which means you
could
extract information while the tape was in fast forward or rewind shuttle.

I think what one of the things they do now instead of the miller code is
they use more complex words to describe a set of sequences. In other words
to send say 8 bits you might send 9 or 10 bits depending upon the coding.
This will assure that there is negligible DC in the bit sequence. Of course
it take more bandwidth. However they
can also bury control codes in the sequence or library as well. I know just
enough to be dangerous.

Norman

"PC-Sat provides quality Usenet Newshosting and Newsfeeds for ISP and
Corporations. Interested see www.pc-sat.com"

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Norman Gillaspie
> Sent: Wednesday, November 11, 1998 10:09 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: Miller code
>
>
> Peter,
> Here is where you can download a detaled description of the Miller code.
>
> http://www.patents.ibm.com/cgi-bin/viewpat.cmd/US04027335__
>
> This is an old Ampex Patent that has run out. However it has
> everything you
> probably need.
>
> Cheers
>
> Norman Gillaspie
>
> "PC-Sat provides quality Usenet Newshosting and Newsfeeds for ISP and
> Corporations. Interested see www.pc-sat.com"
>
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Peter Grey
> > Sent: Wednesday, November 11, 1998 4:43 PM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: Miller code
> >
> >
> > Can anyone direct me to a site that will explain miller codes? I
> > have looked
> > in all my texts and cannot find anything. Web searches have not revealed
> > anything for me either,
> >
> >
> > TIA,
> >
> >
> > Peter Grey
> > Neosystems
> >
>