Blu-ray Discの規格推進団体 BDA が、新規格 BDXL および IH-BD を発表しました。BDXL は3層から4層の記録層を使用し、容量 100GB または 128GB のライトワンスメディア、および容量 100GB のリライタブルメディアを定義します。用途は放送や医療、文書保管など大容量のアーカイブが必要な産業向け。また「特にBDレコーダが広く受け入れられている地域で」コンシューマー向けとしても導入が想定されています。

もう一方の IH-BD (Intra-Hybrid Blu-ray Disc) は、それぞれ一層25GBのBD-ROM層とBD-RE層をひとつのディスクに収めたハイブリッドメディア。ROM側に上書きされては困るデータを保持しつつRE側にはユーザーデータの書き込みを許して、物理的には一枚にまとめたい、という場合に利用されます。

気になる互換性については、BDXL も IH-BDも従来のドライブには対応せず、読み書きには新設計のハードウェアが必要です。ただしいずれのメディア規格もBDの拡張であるため、BDXL や IH-BD対応ドライブは現行の25GB / 50GB ディスクに対応する後方互換性を備えます。両規格とも、策定完了は「今後数か月以内」の見込み。
Blu-ray Disc Association Announces Additional Format Enhancements

LOS ANGELES --(Business Wire)-- Apr 03, 2010 The Blu-ray Disc Association (BDA) today announced two new media specifications that use Blu-ray Disc technology to provide targeted functionality for commercial and consumer applications. The specifications for BDXL™ (High Capacity Recordable and Rewritable discs) and IH-BD (Intra-Hybrid discs) are expected in the next few months.

The BDXL specification, which is targeted primarily at commercial segments such as broadcasting, medical and document imaging enterprises with significant archiving needs, will provide customers with write-once options on 100GB and 128GB capacity discs and rewritable capability on 100GB discs. The discs reach these capacities by incorporating three to four recordable layers. A consumer version of BDXL is also expected, particularly in those regions where BD recorders have achieved broad consumer acceptance.

"Professional industries have expressed a desire to find optical disc solutions that enable them to transition away from magnetic media for their archiving needs," said Victor Matsuda, Blu-ray Disc Association Global Promotions Committee chair. "Leveraging Blu-ray Disc to meet this need provides professional enterprises with a compact, stable and long term solution for archiving large amounts of sensitive data, video and graphic images using a proven and widely accepted optical technology."

The Intra-Hybrid Blu-ray Disc (IH-BD) incorporates a single BD-ROM layer and a single BD-RE layer so as to enable the user to view, but not overwrite, critical published data while providing the flexibility to include relevant personal data on the same physical disc. This allows for consumer specific applications where combining published content with related user data on a convenient, single volume is desirable. Both the ROM and the RE layers on IH-BD discs provide 25GB of capacity.

Because both BDXL and IH-BD are specially designed formats with specific market segments in mind, newly-designed hardware is required to play back or record BDXL or IH-BD media. However, because the new media specifications are extensions of current Blu-ray Disc technology, future BDXL and IH-BD devices can be designed to support existing 25GB and 50GB Blu-ray Discs.

About Blu-ray DiscTM

Blu-ray DiscTM is the next-generation optical disc format for high definition audio-video and high-capacity data software applications. A single-layer Blu-ray Disc holds up to 25 gigabytes of data and a double-layer Blu-ray Disc holds up to 50 gigabytes of data.

About the Blu-ray Disc Association

The Blu-ray Disc Association (BDA) is responsible for promoting and developing business opportunities for Blu-ray Disc - the next-generation optical disc format for storing high-definition movies, games, photos and other digital content. The BDA has more than 170 members. Its Board of Directors consists of individuals affiliated with the following member companies: Apple Inc., Dell Inc., Hewlett-Packard Company, Hitachi, Ltd., Intel Corporation, LG Electronics Inc., Mitsubishi Electric Corporation, Oracle Corporation, Panasonic Corporation, Pioneer Corporation, Royal Philips Electronics, Samsung Electronics Co., Ltd., Sharp Corporation, Sony Corporation, TDK Corporation, Technicolor, Twentieth Century Fox, Walt Disney Pictures and Television, and Warner Bros. Entertainment Inc.

The Blu-ray DiscTM name and Blu-ray DiscTM logo are registered trademarks of the Blu-ray Disc Association.

BDXL™ is a trademark of the Blu-ray Disc Association.