Blank And Double Layer Media

Blue Ray Discs, High definition DVDs, Digital video disc RW

, dual layer and several much more have specific functions that are not noted by users, but actually are utilized most of the time for the wrong factors since it's the quickest solution in some circumstances. It is usually crucial to get a vibe and backdrop of products to know exactly when and how to use them.

Format wars begin over technical specifications but wind up being decided by business considerations. Thus it was during the old Betamax versus VHS war among Sony and Panasonic within the late 1970s and early 1980s, and hence it remained among Blue-Ray and HD-DVD recently. Within the end, there weren't that numerous differences between the two, but it was the increasing lack of industry assistance that doomed HD-DVD to the status of historical footnote much more than anything technological.

High definition DVD-ROM, Hd DVD-R, and Hi-def DVD-RW all provide single-layer capacities of 15 GB and dual-layer capacities of 30 GB, while High definition DVD-RAM has a single-layer capacity of 20 GB. In common with standard DVDs, an HD-DVD's data layer was developed to be 0.6mm below the surface so that some degree of protection from physical damage may possibly be provided. The aperture of an HD-DVD pickup head is 0.1mm smaller than that of a standard Dvd, which is 0.6mm. Hence, all HD-DVD players are backward-compatible with DVDs and CDs.

Along with previous optical disc formats, the HD-DVD supported several filing systems, including ISO 9660 and Universal Disk Format (UDF). All HD-DVD titles released utilized UDF 2.5, where multiplexed audio and video streams are stored in an EVO container format. Audio encoding is provided at as much as 24-bit/192KHz stereo, or as much as eight channels at 24-bit/96-KHz. Linear or uncompressed PCM, Dolby Digital AC-3, Dolby Digital EX, Dolby Digital Plus, and Dolby TrueHD as well as DTS are supported. Secondary soundtracks are available as DTS-HD High Resolution Audio or DTS-HD Master Audio. LPCM is also offered for audiophiles intent on the purest of high-fidelity.

As for video, HD-DVDs can be encoded in VC-1, AVC, or MPEG-2 formats, and are capable of displaying a broad range of resolutions, from low-res CIF all the way towards the HDTV formats of 720p and 1080i/p. Movies on HD-DVD are featured in a 1080-lined format while supplemental materials may be in 480i or 480p. Most releases were encoded in VC-1 by far, with the vast majority from the remainder utilizing AVC.

As mentioned at the beginning, you can find numerous factors for the demise of an otherwise promising format, but nearly certainly none are technical. It was the gradual loss of market assistance that made the final determination.

by: Terrance A. Philips

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