With the unification talks failing it really is your responsibility to create the selection which format to consider. To guide a person with this difficult decision will be the lowdown on how each format matches below.
History
The blu-ray format's head manufacturers are Sony and Philips with Toshiba and also Hitachi heading up the HD-DVD format. This circumstance is not the very first instance when these two sides have gone at each other with opposing formats. The DVD format was born from the cooperation on the Multimedia Compact Disc coming from Sony/Philips (MMCD) and the Super Density Disc (SD) coming from Toshiba. Though it ended nicely for the purchaser with the DVD format becoming vastly adopted as well as starting to be the new standard, it turned out Toshiba's camp that arrived number one in regards to royalties.
This led to the work on modern formats by each sides with Sony aiming to restore several of its lost market. The two projects though were in manufacturing however , not genuinely going anywhere at the moment. Sony's Professional Disc for Data (PDD) became the blu-ray format while Toshiba's Advanced Optical Disc turning into HD-DVD. This leads us back for the original situation wherever you will find 2 competing formats with a unification looking a lot less likely.
Technical
Both blu-ray and HD-DVD use a wavelength of 405nm on the other hand the smaller track pitch on blu-ray (see Blu-ray Disc) enables much more data to become squeezed on and also provides the larger capacity. Even so it is a varying track pitch that makes these two formats incompatible. The surface layer from the 2 is different also as HD-DVD uses a .6mm layer similar to DVD whilst blu-ray uses a .1mm clear plastic layer.
This particular variation may be the primary reason why costs are higher with blu-ray. High priced production methods are needed to be able to produce the discs as well as a hard coating must be applied to create the discs suitably resilient to dust and also fingerprints.
Capacity
Blu-ray right now provides discs in 25gb for single layer as well as 50gb for dual layer. On the other hand TDK has began work on a 200gb disc which is 6x33gb layers.
HD-DVD is available in 15gb for your single layer as well as 30gb for your dual layer. Best tests to date have attained 45gb however , 60gb will be the theoretical limit. This indicates that the maximum for HD-DVD is only 10gb extra than what blu-ray can currently offer.
Codecs
Equally formats utilize the same codecs to play video as they are together competent to play standard as well as high-definition. This means that MPEG-2, Microsoft Video Codec 1 (aka VC1, WMV HD, etc.) and H.264 / MPEG-4 AVC are all supported on both formats.
Security
Both blu-ray and also HD-DVD have to generate use of HDCP encrypted output and the Advanced Access Content System (AACS). Together HDCP and AACS are mandatory for any discs with HD video.
Blu-ray also comes with ROM-Mark watermarking technologies as well as BD dynamic crypto that creates special keys for batches of discs.
HD-DVD makes use of an identical system in the Volume Identifying technologies.
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