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Posted by Bill Vermillion on 09/28/01 11:36
In article <a4rjr15v2tb2m0uobfu8tkime6cggqfmqu@4ax.com>,
Roy L. Fuchs <roylfuchs@urfargingicehole.org> wrote:
>On Mon, 02 Jan 2006 23:35:01 GMT, bv@wjv.com (Bill Vermillion) Gave
>us:
>
>>In article <rr7jr1d06e9j2ks905102neuoghgm2jvv5@4ax.com>,
>>Roy L. Fuchs <roylfuchs@urfargingicehole.org> wrote:
>>>On Mon, 02 Jan 2006 17:45:01 GMT, bv@wjv.com (Bill Vermillion) Gave
>>>us:
>>
>>>>Actually the pits won't be the same length as they are just
>>>>representations of a clipped FM signal. So the pit length will
>>>>vary directly with the frequency at that instant. But the tracks
>>>>will be the same length.
>>
>>> The pits for the same data would be the same length, regardless of
>>>where they appear on the disc. Satisfied?
>>
>>Nope. Look at the way the FM signals are encoded. It's a varying
>>frequency. Then you clip it to give you a lot of little
>>square-wave-looking pieces and encoded those on the disk - and they
>>vary in direct proportion to the original signal.
>>
>>It basically RF encoding to an analog medium.
>>
>>Bill
> You obviously didn't get what I said. I said the same info (hence
>same FM signal) being recorded in two different locations on the disc
>itself. Since a CLV disc slows down as it progresses to the outside
>of the disc, the same info appearing in two different places should
>have the same pit sizes and shapes since the track passes under the
>head at the same rate.
Again - FM - Frequency Modulation - the frequency changes and the
pit/land lengths vary directly with the changing frequency.
--
Bill Vermillion - bv @ wjv . com
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