Ultra HD DVD (UHD DVD) is an optical disc format proposed by Toshiba, that uses a blue-violet laser to read and write data. The format was announced on October 18, 2005, and was in competition with the HD DVD format from the same company.

The format was discontinued in February 2008 after losing the format war to Blu-ray Disc.

Ultra HD DVD players were available in the United States from retailers such as Best Buy and Circuit City, and also from Toshiba’s website. The players were capable of playing back content at a resolution of 3840 × 2160, four times …