Enhanced Versatile Disc
The Enhanced Versatile Disc ( EVD ) is an alternative to DVD, developed in and for China. Physically, the DEA does not differ from the DVD. It uses the UDF file system and can be read by conventional PC - DVD drives. The differences to the DVD are in the directory structure and the codecs used.
The first took the development of the DEA in 1999. Principal motive for the development of new standards was the avoidance of royalties, the ( DVD ) must be submitted to the DVD Forum and MPEG in the production of players for video DVD. The EVD is about as video codec is not MPEG-2 video, but instead the proprietary codecs VP5 and VP6 On2 Technologies, which have been specially designed for and apply for probably less licensing costs. In addition, these codecs offer better compression than MPEG -2 video. It is even possible to accommodate videos in HDTV quality on an EVD, but only for films with a duration up to about two hours or with compromises in image quality.
As an audio codec Enhanced Audio Codec (EAC ) is used 2.0, which supports the audio formats mono, stereo and 5.1 -channel surround sound.
The first EVD was presented on 18 November 2003. It soon came to a dispute between On2 Technologies and Beijing E - World ( the consortium that developed the standard ) in which it came to the correct billing of royalties. So far seems the DEA, although supported by the Chinese government to have no been widely publicized and its future is still uncertain, partly because it supposedly is as yet little support from the major movie studios. As interesting but the approach may be considered, better quality of the video material can not be achieved through higher capacity of the medium, but by making efficient coding.
According to Foxnews EVD was between 2003 and 2004 also also find no great appeal in the population, so this was not developed at the time.