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Posted by Gary Eickmeier on 10/07/60 11:32
Richard Crowley wrote:
> "Gary Eickmeier" wrote ...
>
>> David Carlstrom wrote:
>>
>>> As I recall the audio blocks are at one end of the helical stripe.
>>> That is the end that is not tracking correctly.
>>
>>
>> Is that possible David? I mean, technically - can you get part of a
>> digital scan and have it make sense? Does the audio word or file go to
>> a different processor, and just get lost if it isn't all picked up?
>
>
> It seems well within the realm of possibility to me.
> http://www.linuxsoft.cz/img/dv/dv2/5.png
>
>> And why wouldn't a sophisticated camera like this have auto tracking
>> to align itself to the recorded track, wherever it may be?
>
>
> They do (or DV wouldn't work at all.) Note that there isn't any
> linear sync track (like with older helical-scan formats). But the
> auto-tracking doesn't have enough latitude to handle out-of-spec
> tapes or tape transport mechanisms which are out of alignment.
Thanks Richard. The diagram shows that the audio is the first part of
the track picked up, not the last. The subcode is the last. But I son't
see how any part of that scan could be missed by a new head drum,
especially if you have auto alignment of the scan.
Gary Eickmeier
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