| HD DVD or High-Definition DVD is a high-density | | | | (BD-J), while the DVD Forum was promoting |
| optical disc format designed for the storage of | | | | Microsoft's "iHD" (which became HDi). A much |
| data and high-definition video. | | | | larger issue, though, was the physical formats of |
| HD DVD was designed to be the successor to | | | | the discs themselves; the Blu-ray Disc |
| the standard DVD format and is derived from the | | | | Association's member companies did not want to |
| same underlying technologies. Since all variants | | | | risk losing billions of dollars in royalties as they had |
| except the 3x DVD employ a blue laser with a | | | | done with standard DVD. An agreement seemed |
| shorter wavelength, it can store about 3 1/2 | | | | close, but negotiations proceeded slowly. |
| times as much data per layer as its predecessor | | | | On March 31, 2006, Toshiba released their first HD |
| (maximum capacity: 17 GB per layer instead of | | | | DVD player in Japan at US $934, which was the |
| 4.7 GB per layer). A 51 GB triple-layer spec has | | | | first HD player available to consumers, beating |
| been approved; however no movies are currently | | | | Blu-ray to the market by about three months. HD |
| scheduled for this disc type. | | | | DVD was released in United States on April 18, |
| HD DVD is currently in a "format war" with rival | | | | 2006, with players priced at $499 and $799. |
| format Blu-ray Disc, to determine which of the | | | | The first HD DVD titles were released on April 18, |
| two formats will become the leading carrier for | | | | 2006. |
| high-definition content to consumers. | | | | HD DVD delivers the latest in high definition |
| In an attempt to avoid a costly format war, the | | | | picture quality and the best sound you have ever |
| Blu-ray Disc Association and DVD Forum started | | | | experienced, and duplication can be done for |
| to negotiate a compromise in early 2005. One of | | | | those like it would be done for cd and dvd |
| the issues was that Blu-ray's supporters wanted | | | | duplication. |
| to use a Java-based platform for interactivity | | | | |