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Toshiba Unveils 45GB HD DVD-ROM Disc and Hybrid ROM Disc.

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Toshiba Unveils 45GB HD DVD-ROM Disc and Hybrid ROM Disc Further
expands horizon of future digital home entertainment (May 10,2005)

Toshiba Corporation today announced development of a triple-layer HD
DVD -ROM (read-only) disc with a data capacity of 45 gigabytes, 50%
more than the 30-gigabyte dual-layer HD DVD -ROM disc already
announced and enough to record twelve hours of high-definition movies
on a single disc. The new disc adds a high-end option to the previous
HD DVD -ROM disc lineup that includes the 15GB (single-layer,
single-sided) and 30GB ( dual-layer , single-sided). These two discs
are already approved and standardized at the DVD Forum.

Toshiba also announced a double-sided, dual-layer hybrid ROM disc
comprised of dual-layer HD DVD -ROM side and dual-layer DVD -ROM side.
The hybrid disc can store 30GB of high-definition content on the HD
DVD -ROM side and 8.5GB of standard-definition content on the DVD -ROM
dual layer side. More than 84 million DVD players and recorders were
produced worldwide in 2004 alone. The standard definition content of
the new hybrid discs can be replayed on these platforms, while their
owners will also be able to enjoy high-definition content from the
same source when they purchase HD DVD players in the future. The new
disc further prepares the way for a smooth transition from DVD to HD

Details of these new discs will be presented at the May 11 HD DVD
workshop at Media-Tech Expo 2005 in Las Vegas , U.S., the leading
annual trade show for the optical disc manufacturing industry.

All these new versions of HD DVD -ROM discs share the same disc
structure as previously announced HD DVD formats, and today's DVD
format: two 0.6-mm thick discs bonded back-to-back, a time-tested
physical structure with proven volume manufacturing capability at
little cost increment.

Memory-Tech Corporation, Japan's largest independent disc replicator,
has confirmed the new 45GB and hybrid discs can be produced on their
existing manufacturing lines and equipment, which are tailored to
produce HD DVD discs, with only minor additional investment and
minimum additional production cost per disc.

Mr. Shiroharu Kawasaki, President and CEO, Memory-Tech, said: "These
new HD DVD discs will surely be welcomed by content holders, including
Hollywood studios and game developers, as further broadening the scope
of future applications. We have already started verification for
volume production of triple-layered discs, and we are confident of
early verification as they are based on the 0.6mm disc structure and
established production technologies. We at Memory-Tech are fully
committed to flexibly meeting variety of user requirements."

NEC Corporation and SANYO Electric Co., Ltd., both strong supporters
of the HD DVD format also welcomed this announcement. "We are excited
by the new discs and the way they further extend the possibilities of
the HD DVD format," said Mr. Hiroshi Gokan, Executive General Manager
of Computers Storage Products Operations Unit at NEC. SANYO's Dr.
Keiichi Yodoshi, Deputy General Manager of R&D Headquarters said, "The
new discs demonstrate that 0.6mm discs can support diverse
applications and achieve technical excellence, while fully securing
firm backward compatibility."

Technical features
1) Triple-layer 45GB disc
The newly developed ROM disc has a single-sided, triple-layer
structure (see attachment). Each layer stores 15 gigabytes of
information. Triple-layer discs can be easily produced by back-to-back
bonding of a 0.6mm-thick dual-layer disc and a single-layer 0.6mm

In the process, a single-layer disc is first produced, using the same
process as for HD DVD -ROM. Next, the second layer is formed on first
layer using a one-time polycarbonate stamper, the same process used
for the DVD -18 disc, the double-sided DVD disc that has dual-layers
on both sides. Finally, the single-layer 0.6mm disc is bonded to the
dual-layer disc, using standard technology.

2) Double-sided, Dual-layer Hybrid Disc
In December 2004, Toshiba and Memory-Tech announced development of a
single-sided, dual-layer HD DVD -ROM/ DVD -ROM hybrid disc. The DVD
layer had a 4.7GB capacity, meeting the specification for current DVD
discs, while the HD DVD layer had a 15GB capacity.

Now Toshiba has developed a double-sided, dual-layer HD DVD -ROM/ DVD
-ROM hybrid disc. Simply explained, the new hybrid disc bonds together
a 0.6mm thick dual-layer HD DVD -ROM disc with 30GB capacity, and a
0.6-mm thick dual-layer DVD -ROM disc with an 8.5GB capacity (see

The dual-layer DVD -ROM disc structure is well established. The new
disc has a structure as simple as that of current dual-layer DVD -ROM
discs. Today, more than fifty percent of DVD -ROM discs on the market
are dual-layer versions.

The new disc brings the clear benefit of satisfying consumers,
retailers, disc producers and Hollywood studios. It allows consumers
to view DVD content on standard DVD players and, after purchasing an
HD DVD player, to enjoy high definition content on the HD DVD layer
from the same disc. The new disc structure also increases options for
content providers: they can provide the same content in two formats,
or use the HD DVD layer for a feature movie and the DVD layer to store
promotional videos or audio content, including the movie sound track.
Retailers can also promote HD DVD hardware as well as maintaining
standard DVD sales.

About HD DVD
HD DVD is the next generation DVD format being standardized at the DVD
Forum, which represents over 230 consumer electronics, information
technology, and content companies worldwide. HD DVD players and HD DVD
video software are expected to come to market in late 2005, and will
allow consumers to enjoy video content, including Hollywood movies,
with crystal-clear, high-definition picture quality.

In November 2004, Paramount Home Entertainment, Universal Studios Home
Entertainment, Warner Home Video, New Line Home Entertainment and HBO
Home Video announced their official support of the HD DVD format.

With 0.6-millimeter thick discs bonded back-to-back, HD DVD discs
adopt completely the same disc structure as current DVD discs. Because
of that, disc manufacturers will be able to utilize their current disc
manufacturing lines with only minimum upgrades.

"Arguing with anonymous strangers on the Internet is a sucker's game
because they almost always turn out to be -- or to be indistinguishable from
-- self-righteous sixteen-year-olds possessing infinite amounts of free time."
- Neil Stephenson, _Cryptonomicon_
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