HD DVD

definition

HD DVD is a kind of digital storage formats of blue light beam disc products, already developed now become HD DVD criteria of by HD DVD Promotion association (HD DVD Group) is responsible for the formulation and end development. HD DVD rival blu-ray disks (Blu - ray Disc) similar, and CD blanks are all the same size (diameter 120 millimeter) of optical digital storage medium, use 405 nano wavelength of blue light.

HD DVD by Toshiba, NEC, sanyo motors for enterprises to form the HD DVD promotion association is responsible for the promotion, hewlett-packard (also support BD), Microsoft and Intel, ect join HD DVD faction while the mainstream piece factory universal is also one of the members.

But in 2008, as previously support HD DVD of warner announced, and U.S. HD DVD from several chain store decided to support blu-ray products, Toshiba final on February 19th announce the termination HD DVD career.

HD DVD species

HD DVD can be classified into four categories: read-only HD DVD - ROM, a single written HD dvd-r, many of the written HD dvd-rw and HD DVD dvd-ram. Among the HD DVD dvd-ram specification has not yet been finalized. February 2008, HD dvd-rom and HD dvd-rw technical version 1.0, HD dvd-r for 0.9.

The file system

HD DVD compatible ISO 9660 and UDF wait a few types of file system, the default for UDF 2.5.

Video format

Acoustics, HD DVD support the use of highest double track 24 - bit / 192kHz or is the most eight the vocal 24 - bit / 96kHz coding. All HD DVD player must support the linear PCM (not compressed Dolby Digital AC), Dolby Digital EX - 3, Dolby Digital, DTS, Plus and TrueHD Dolby decoding. If the HD DVD Audio track with the second word, so the Audio track can use the above format is used to store, or DTS - HD High Resolution numerous and DTS - HD Master numerous.

In order to enjoy the highest resolution acoustics, HD DVD manufacturers can choose linear PCM, TrueHD or DTS - HD Dolby Master numerous coding. Even so, because linear PCM bandwidth require very high, so in HD DVD without distortion of audio usually use without distortion Dolby TrueHD format.

Image, HD DVD support many different resolutions, by the lowest to the highest, CIF SDTV by DVD standard storage images to a high definition televisions, 1080i, 720p 1080p. The coding, HD DVD but using DVD support MPEG2 or new support, more efficient AVC and VC - 1.

Interactive content

HD DVD Format (using Interactive HDi HDi Interactive Format) technology makes HD DVD allows Interactive content. HDi interactive format built based on network technology, such as HTML, XML, CSS, SMIL, ECMAScript (JavaScript) etc.

HD DVD allograft

DVD/HD DVD Disc (Hybrid DVD/HD DVD Hybrid CD) : this CD contains DVD image and HD DVD images. When using a DVD player, it will play a DVD information, otherwise it will play HD DVD information. Another kind of hybrid CD side would be DVD, the other side is HD DVD. This allows consumers don't worry buy to return with their own CDS of player incompatibility. HD DVD/Blu - ray hybrid blu-ray Disc (HD DVD/hybrid CD) : Warner Brothers in 2007 CES in the assembly publication. CD side is HD DVD, the other side is blu-ray disc, Both sides are supported double technology. However, in November 2007, Warner Brothers announced stop developing HD DVD/blue hybrid CDS.

3 x DVD: 3 x DVD is red DVD. However, it can provide ordinary DVD three times the bandwidth, and on DVD format data stored in HD DVD.

HD DVD with 3 x REC: same, use the HD DVD format technical data treated as a DVD. The HD material in HD REC using h.264 / AVC mpeg-4 compressed. This technology has on 12th September 2007 formally recognized by DVD Forum.