Twin Format layer to play selection issue for PC software player

keiji_katata at post.pioneer.co.jp keiji_katata at post.pioneer.co.jp
Fri Aug 12 04:53:52 PDT 2005


* From the T10 Reflector (t10 at t10.org), posted by:
* keiji_katata at post.pioneer.co.jp
*

5. I am confused. Who is selecting the HD format layer, the playback
software?
-> User commanded playback software to play HD video back. Then playback
software changes Format layer.

Hence you avoid to need a OS (kernel) patch to support
-> woo..?, to make multi-session works well, OS must support them
(Multi-session on ROM, strange Profile structure, CD audio session with DVD
and UDF 2.5, etc). So the system may not work on current OS.

>From part 3 layer point of view, how does Movie studio make such
multi-session disc? How does playback control work? Copy protection?
Regional playback control? Some HD CE system may not support DVD. It is
because that DVD needs additional cost and DVD is out of their business.

Do you really think that we need 9/12 Fuji meeting?
(In such case, we must move on Sunday.)

Best regards,

Keiji Katata
PIONEER CORP.





"David Burg" <dburg at nero.com>@avc-pioneer.com on 2005/08/12 19:40:10

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>
bcc:
$B7oL>(J:  RE: Twin Format layer to play selection issue for PC software player

 Hello Katata-san,

5. I am confused. Who is selecting the HD format layer, the playback
software?

"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.

Best regards,

David Burg,
Nero AG.

-----Original Message-----
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
player


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
been selected.

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?

Best regards,

Keiji Katata
PIONEER CORP.






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