| DVD is a high-density optical disc. It is the acronym of | | | | they may use the Advanced Access Content System |
| Digital Video Disk also known as Digital Versatile Disk. It | | | | (AACS). There is no Region Coding in the HighDef |
| is designed for data and video storage. In the 1990s, | | | | specification, which indicates that the titles from any |
| the HDVT began to enter the market of removable | | | | country can be played in players of any other country. |
| storage devices. In 1993, two corporation groups were | | | | In Europe and other places, the consumers have used |
| trying to make high-density optical storage standards. | | | | multi region players to play DVDs purchased in or from |
| On one side, there was Sony and Philips, and the other | | | | the US. HighDefs uses the HDI format for the |
| group was headed by Toshiba, Time Warner, Hitachi | | | | interactive content. HDI is based on web technologies |
| and others. Sony started the two programmes for the | | | | such as HTML, CSS and others. |
| application of UDO (Ultra Density Optical) and DVR | | | | The hybrid HD Disc format is the one to contain both |
| Blue. | | | | DVD and HD Disc of the same movie in the single disc |
| The War between DVD and HD DVD is on. The | | | | and give smoother transition for the studios. The Digital |
| Digital Video Disk forum had a disagreement over | | | | Video Disc replication companies are using the current |
| whether to go with the more expensive Blue Rays or | | | | production equipment with some minor alterations to |
| not. The proposed Blue Ray disc was expensive and | | | | change over to the format of HD Disc. |
| physically different from the Digital Video Disks. As it | | | | Microsoft supported both Digital Video Disc and HD |
| was in the initial stage, so it was very much | | | | disc. Xbox was shelved with a DVD drive. Xbox 360 |
| problematic also. To avoid a costly format war the | | | | contained HD Disc drive. The Microsoft HD Disc drive |
| Blue Ray Disc Association and DVD forum started to | | | | for Xbox 360 game console gives the Xbox 360 the |
| negotiate a compromise. | | | | ability to play the HD Disc movies. The Xbox 360 has |
| DVD and HD DVD differs in storage space. Later has | | | | an add-on HD Disc drive. It is used with a desktop or |
| a single layer capacity of 15 GB, dual layer capacity of | | | | laptop PC running windows XP or windows Vista. The |
| 30 GB and 51 GB of triple layer disc. Former supports | | | | third party player software can play HD Disc movies |
| so many file systems such as UDF, ISO and others. | | | | using the add-on drive. So many buy the HD Disc |
| The HD DVD player is required to play Dolby digital | | | | add-on drives for the PCs due to its cheap price. |
| audio format AC3, Dolby Digital Plus and Dolby Digital | | | | The major studios in North America along with |
| EX and others. HighDef format supports a wide | | | | Universal Studios have backed the HD DVDs strongly. |
| variety of resolution for the video to play. | | | | The music groups back the HD DVD format in the |
| Comparing DVD with HD Disc in terms of resolution will | | | | music industry. Both conventional DVD and HD DVD |
| give better idea. Usually, a standard 4.7 GB Disk | | | | have the same manufacturing process and protection. |
| supports maximum resolution of 720x576. However, | | | | There are two types of hybrid formats, which contain |
| HighDefTV support starts from the 720p resolution. | | | | standard DVD format video for playback in regular |
| The publisher wants to protect the HighDef content | | | | DVD players. |