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This article compares the technical specifications of multiple high-definition formats, including HD DVD and Blu-ray Disc; two mutually incompatible, high-definition optical disc formats that, beginning in 2006, attempted to improve upon and eventually replace the DVD standard. The two formats remained in a format war until February 19, 2008, when Toshiba, HD DVD's creator, announced plans to cease development, manufacturing and marketing of HD DVD players and recorders.

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  • Comparison of high-definition optical disc formats (en)
  • 第3世代光ディスク (ja)
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  • This article compares the technical specifications of multiple high-definition formats, including HD DVD and Blu-ray Disc; two mutually incompatible, high-definition optical disc formats that, beginning in 2006, attempted to improve upon and eventually replace the DVD standard. The two formats remained in a format war until February 19, 2008, when Toshiba, HD DVD's creator, announced plans to cease development, manufacturing and marketing of HD DVD players and recorders. (en)
  • 第3世代光ディスク(だいさんせだいひかりディスク)は、光ディスクのうち、主に2000年代以降に登場し、記録・再生に青紫色半導体レーザーを使用するものである。片面1層の12 cmディスクの場合で最大25 GB程度の容量がある。映像記録用途では、HDTV画質に適する。 主要な第3世代光ディスクとしてBlu-ray Disc(BD)、Ultra HD Blu-ray (UHD BD)、Professional Disc (PFD、PD)、HD DVD、Ultra Density Optical (UDO)があり、本記事では主にBDとHD DVDについて記述する。 BDとHD DVDは日本のメーカーを中心にアメリカの映画会社やパソコン会社などが両陣営に分かれて規格争いを繰り広げ、かつてのベータマックス・VHSによる家庭用VTRの規格競争(ビデオ戦争)を彷彿とさせていたが、東芝のHD DVD事業終息に伴い事実上BDの1規格に収束した。 (ja)
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