Blu-ray Disc
Blu-ray Disc
Blu-ray Disc (BD), often known simply as Blu-ray, is a digital optical disc storage format. It is designed to supersede the DVD format, capable of storing several hours of video in high-definition video (HDTV 720p and 1080p). The main application of Blu-ray is as a medium for video material such as feature films and for the physical distribution of video games. The name "Blu-ray" refers to the blue laser (which is actually a violet laser) used to read the disc, which allows information to be stored at a greater density than is possible with the longer-wavelength red laser used for DVDs.
The plastic disc is 120 millimetres (4.7 in) in diameter and 1.2 millimetres (0.047 in) thick, the same size as DVDs and CDs. Conventional or pre-BD-XL Blu-ray Discs contain 25 GB per layer, with dual-layer discs (50 GB) being the industry standard for feature-length video discs. Triple-layer discs (100 GB) and quadruple-layer discs (128 GB) are available for BD-XL re-writer drives.
High-definition (HD) video may be stored on Blu-ray Discs with up to 1920×1080 pixel resolution, at 24 progressive or 50/60 interlaced frames per second. DVD-Video discs were limited to a maximum resolution of 480i (NTSC, 720×480 pixels) or 576i (PAL, 720×576 pixels). Besides these hardware specifications, Blu-ray is associated with a set of multimedia formats.
The BD format was developed by the Blu-ray Disc Association (BDA), a group representing makers of consumer electronics, computer hardware, and motion pictures. Sony unveiled the first Blu-ray Disc prototypes in October 2000, and the first prototype player was released in Japan in April 2003. Blu-ray faces competition from video on demand (VOD) and the continued sale of DVDs. Notably, in January 2016, 44% of U.S. broadband households had a Blu-ray player. For playback of 4K content, the BDA introduced a variant of Blu-ray called Ultra HD Blu-ray.
Competition from HD DVD
The DVD Forum, chaired by Toshiba, was split over whether to develop the more expensive blue laser technology. In March 2002 the forum approved a proposal, which was endorsed by Warner Bros. and other motion picture studios. In March 2002 the forum approved a proposal, which was endorsed by Warner Bros. and other motion picture studios. The proposal involved compressing high-definition video onto dual-layer standard DVD-9 discs. In spite of this decision, however, the DVD Forum's Steering Committee announced in April that it was pursuing its own blue-laser high-definition video solution. In August, Toshiba and NEC announced their competing standard, the Advanced Optical Disc. It was finally adopted by the DVD Forum and renamed HD DVD the next year, after being voted down twice by DVD Forum members who were also Blu-ray Disc Association members—a situation that drew preliminary investigations by the U.S. Department of Justice.
HD DVD had a head start in the high-definition video market, as Blu-ray Disc sales were slow to gain market share. The first Blu-ray Disc player was perceived as expensive and buggy, and there were few titles available. The Sony PlayStation 3, which contained a Blu-ray Disc player for primary storage, helped support Blu-ray. Sony also ran a more thorough and influential marketing campaign for the format. AVCHD camcorders were also introduced in 2006. These recordings can be played back on many Blu-ray Disc players without re-encoding but are not compatible with HD DVD players. By January 2007, Blu-ray Discs had outsold HD DVDs, and during the first three quarters of 2007, BD outsold HD DVD by about two to one. At CES 2007, Warner proposed Total Hi Def—a hybrid disc containing Blu-ray on one side and HD DVD on the other, but it was never released.
On June 28, 2007, 20th Century Fox cited Blu-ray Disc's adoption of the BD+ anticopying system as key to their decision to support the Blu-ray Disc format. On January 4, 2008, a day before CES 2008, Warner Bros. (the only major studio still releasing movies in both HD DVD and Blu-ray Disc format) announced that it would release only in Blu-ray Disc after May 2008.
By June 2008, over 2,500 Blu-ray Disc titles were available in Australia and the United Kingdom, with 3,500 in the United States and Canada. In Japan, over 3,300 titles have been released as of July 2010.
AnyDVD HD is a Windows based application that removes restrictions of DVD and Blu-ray media automatically in the background.
AnyDVD HD works in the background to automatically and transparently enable read access of the contents of a movie DVD or Blu-ray as soon as it's inserted into the drive. The DVD/Blu-ray will become useable to your windows operating system and all programs on your computer, such as DVD/Blu-ray backup software like CloneDVD, CloneBD and others, then supporting any DVD or Blu-ray. AnyDVD HD optionally disables RPC region codes, thereby making the movie region free and comfortably viewable on any DVD/Blu-ray player and with any DVD/Blu-ray playback software.
AnyDVD HD allows you to watch Blu-ray movies over a digital display connection, without a HDCP-compliant graphics card and without a HDCP-compliant display. https://www.redfox.bz/en/anydvdhd.html
According to the Russian company that made the software deuhd, the latest version of the copyright protection scheme for 4K UHD Blu-ray discs has been cracked.
AACS (Advanced Access Content System) is the name of the Digital Rights Management (DRM) scheme, which has been used on Blu-ray discs since the optical format was established. An updated version of the scheme is used in UHD Blu-ray disc format, which has proved to be more difficult to crack than the original version so far.
AACS 2.1 tried to address the weaknesses of version 2.0, but a month after it appeared, it also seemed to have been cracked. The manufacturer of Deuhd has officially announced that the latest version of the software will now support the duplication of Fury and AACS 2.1, claiming that the software now duplicates more than 1100 UHD Blu-ray discs (as of June 11).
Torrent Freak asked Arusoft to explain how AACS2.1 works and how cracks are designed. Arusoft unexpectedly said that AACS2.1 now uses an encrypted M2TS file, which now contains "court information". https://www.copyuhd.com/articles/latest-ultra-blu-ray-copy-protection-cracked.html
人们看盗版的原因是正版太贵。如果从网上下载一部盗版电影要20GB, 100元流量费 and/or 10天……
哎，带宽主要用来下电影，硬盘主要用来存电影，显卡主要用来打游戏和看电影…… 了？
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