Twin Format layer to play selection issue for PC software player
dburg at nero.com
Fri Aug 12 03:40:10 PDT 2005
* From the T10 Reflector (t10 at t10.org), posted by:
* "David Burg" <dburg at nero.com>
5. I am confused. Who is selecting the HD format layer, the playback
"Why do we use Multi-Session?"
Because it permits to see both format layers in a single address space. You
eliminate the need of a layer selection command. Hence you avoid to need a
OS (kernel) patch to support the new twin/hybrid format.
From: owner-mtfuji5 at avc-pioneer.com [mailto:owner-mtfuji5 at avc-pioneer.com]
On Behalf Of keiji_katata at post.pioneer.co.jp
Sent: Friday, August 12, 2005 12:11 PM
To: mtfuji5 at avc-pioneer.com
Cc: t10 at t10.org
Subject: RE: Twin Format layer to play selection issue for PC software
5. Assumed demerit
The system has UDF 1.02-2.01 file system. Then user can see DVD format
layer on Explorer. But if HD format layer that uses UDF 2.5 is selected,
then user cannot see HD format layer on Explorer. This means that user
cannot see the HD/DVD hybrid disc on Explorer after HD format layer has
By the wasy, ...
If you want to access the files of the first session,
you will have to 'unmount' the second session and mount
the first session.
Why do we use Multi-Session?
"David Burg" <dburg at nero.com>@avc-pioneer.com on 2005/08/12 18:58:10
mtfuji5 at avc-pioneer.com$B$KJV?.$7$F$/$@$5$$(J
$BAw?.<T(J: owner-mtfuji5 at avc-pioneer.com
$B08 at h(J: <mtfuji5 at avc-pioneer.com>
cc: <t10 at t10.org>
$B7oL>(J: RE: Twin Format layer to play selection issue for PC software player
Questions are always welcome! :-)
4. " So the file system on the last session has file system information of
all files in all sessions."
I think the idea is precisely *not* to reference the previous session in
this multi-format multi-session. The second session does not reference the
files of the first session. If you want to access the files of the first
session, you will have to 'unmount' the second session and mount the first
session. Or more easily, if the file system driver mount the second
the playback software once it finds out it needs to access the first
content (either to play the CD audio sound track or because it does not
suitable codecs for the second session) parse the file system itself
.5. Assumed demerit of this scenario is that when HD playback software is
crashed, OS file system cannot recover data reading from the DVD layer.
Sorry, I could not understand your problem scenario / could not match with
this today's playback-OS file system functionalities.
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