July 20, 2005
Notice to the subscribers of the HD DVD-ROM Format Specifications
important notice is provided for the HD DVD-ROM Specifications
Book Ver.1.2 Subscribers engaged in manufacturing HD DVD-ROM/DVD-ROM
Twin format discs (hereinafter "Subscribers").
Specifications for High Density Read-Only Disc (HD DVD-ROM) Part
1 PHYSICAL SPECIFICATIONS Version 1.1 were upgraded to Ver.1.2
in May 2005. Ver.1.2 specifications provide "HD DVD-ROM/DVD-ROM
Twin format disc" (hereinafter "Twin format disc")
as a normative annex.
format disc is a newly introduced type of disc in the HD DVD-ROM
family. Its dual layer structure is composed of the combination
of HD DVD-ROM single layer and DVD-ROM single layer.
This physical integration of a DVD-ROM layer with an HD DVD-ROM
layer is intended to provide playback functionality of the Twin
format disc not only by HD DVD-ROM players but also by DVD-ROM
The Twin format disc is also intended to be recognized as a Single-Layer
DVD-ROM disc by legacy players that have already been introduced
into the market; therefore, this disc can be played back by many
However, at the same time, due to the new combination of two different
formats for legacy players, there is also possibility that a Twin
format disc may not be correctly identified or played back by
a legacy player.
Subscribers may wish to provide an appropriate notice to end-users
regarding this potential issue. For this purpose, Subscribers
may wish to consider the following example of a caution notice
Example of caution language.
an example, the DVD Forum provides the following sample caution
notice to be used for Twin format disc products for the above-specified
purpose (hereinafter "the Sample Notice").
This disc is a dual layer disc composed of a combination of HD
DVD-Video & DVD-Video single-layers to provide playback functionality
for both HD DVD-Video players and DVD-Video players. However,
some DVD-Video players might not play back this Twin format disc,
due to its physical integration."
4. The DVD Forum offers the Sample Notice only by way of example
for Subscribers’ consideration and individual judgment.
The DVD Forum does not require Subscribers to adopt the above
Sample Notice for any Subscribers’ DVD products. It is Subscribers’
sole discretion whether to use, modify or elect not to use the
5. Subscribers are further advised that the physical characteristics
of any such notice with respect to DVD Products, such as placement,
type size and style, color, etc, shall be determined at the sole
discretion of Subscribers.
6. Subscribers may wish to consult their own legal counsel regarding
the use or non-use of any such notice with respect to their products.
SAMPLE NOTICE IS PROVIDED ONLY AS AN EXAMPLE. THE DVD FORUM MAKES
NO REPRESENTATIONS OR WARRANTIES, EXPRESS, IMPLIED, STATUTORY
OR OTHERWISE, AND EXPRESSLY DISCLAIMS IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE, AND ANY EQUIVALENTS UNDER
THE LAWS OF ANY JURISDICTION, WITH RESPECT TO THE USE OR NON-USE
OF THE SAMPLE NOTICE OR OTHER NOTIFICATION, INCLUDING WITOUT LIMITATION
THE LEGAL EFFECT OF THE USE OR NON-USE OF SUCH NOTICE.
NEITHER THE DVD FORUM NOR ITS MEMBERS SHALL BE LIABLE TO SUBSCRIBERS
FOR ANY DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL OR
PUNITIVE DAMAGES ARISING OUT OF ANY CAUSE OF ACTION RELATING TO
USE OR NON-USE OF THE SAMPLE NOTICE, OR BASED ON MAKING, USING,
SELLING OR DISTRIBUTING ANY DVD PRODUCTS WITH OR WITHOUT THE SAMPLE
NOTICE OR OTHER NOTIFICATION.
2004, the DVD Forum | All Rights Reserved