Who invented blu ray laser

Its manufacturers hope so. But Blu-ray is not alone in the marketplace. A few other formats are competing for a share of the DVD market. The advantage to HD-DVD is that it uses the same basic format as the traditional DVD and can therefore be manufactured with the same equipment , saving on costs. The read-only versions hold slightly less data. Blu-ray and HD-DVD are the two major competitors in the market, but there are other contenders, as well.

Warner Bros. This system uses a higher compression rate to put more information about two hours of high-definition video on a standard DVD.

There are also professional versions of the blue laser technology. The former is designed for use by broadcasters and AV studios.

The latter is primarily for commercial data storage for example, backing up servers. It seems that the future holds a whole lot more than 25 to 54 GB on a single disc. According to T3: Pioneer goes beyond Blu-Ray , Pioneer is developing an optical disc that will blow away the hard disc in most of our PCs in terms storage capacity, holding GB of data.

How so? Pioneer's lasers are ultraviolet , which have an even shorter wavelength than the blue. Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe.

How Blu-ray Discs Work. By: Stephanie Watson. Photo courtesy Blu-ray Disc Association. A single-layer Blu-ray disc , which is roughly the same size as a DVD, can hold up to 27 GB of data -- that's more than two hours of high-definition video or about 13 hours of standard video. A double-layer Blu-ray disc can store up to 50 GB , enough to hold about 4. And there are even plans in the works to develop a disc with twice that amount of storage.

Building a Blu-ray Disc " ". The Name. How Blu-ray Reads Data " ". The two discs are molded. The recording layer is added to one of the discs. The Blu-ray Disc specification requires the testing of resistance to scratches by mechanical abrasion. Usually prerecorded Blu-ray Disc titles ship in packages similar but slightly smaller Unlike the previous releases of mm optical discs i. The format was supposed to use the same codecs and program structure as Blu-ray Disc video, but recorded onto less expensive 8.

Usage of BD9 for releasing content on "pressed" discs has never caught on. After the end of the format war, major producers ramped up the production of Blu-ray Discs and lowered their prices to the level of DVDs. On the other hand, the idea of using inexpensive DVD media became popular among individual users.

A lower-capacity version of this format that uses single-layer 4. Both formats are being used by individuals for recording high definition content in Blu-ray format onto recordable DVD media. Despite the fact that the BD9 format has been adopted as part of the BD-ROM basic format, none of the existing Blu-ray player models support it explicitly.

It was defined in June BD-R 3. BD-RE 4. BDXL discs are not compatible with existing BD drives, though a firmware update may be available for some newer drives. The BD-RE 1. The requirements related with computer file system have been specified in System Description Blu-ray Rewritable Disc Format part 2 File System Specifications version 1. Initially, the BD-RE version 1. Audio, video and other streams are multiplexed and stored on Blu-ray Discs in a container format based on the MPEG transport stream.

That enables transport streams of digital broadcasts to be recorded as they are without altering the format. Although it is quite natural, a function for high-speed and easy-to use retrieval is built in.

This allows multiple video programs to be stored in the same file so they can be played back simultaneously e. The BD-ROM specification mandates certain codec compatibilities for both hardware decoders players and movie software content. Some manufacturers will list field rate for interlaced material, but this is incorrect industry practice. For video, all players are required to support H. VC-1 is a compression standard that was mainly developed by Microsoft.

BD-ROM titles with video must store video using one of the three mandatory formats; multiple formats on a single title are allowed.

Some studios, such as Warner Bros. A secondary audiotrack, if present, may use any of the mandatory or optional codecs. At the JavaOne trade show, it was announced that Sun Microsystems ' Java cross-platform software environment would be included in all Blu-ray Disc players as a mandatory part of the standard. DVDs use pre-rendered MPEG segments and selectable subtitle pictures, which are considerably more primitive and rarely seamless.

At the conference, Java creator James Gosling suggested that the inclusion of a Java virtual machine , as well as network connectivity in some BD devices, will allow updates to Blu-ray Discs via the Internet, adding content such as additional subtitle languages and promotional features not included on the disc at pressing time. All of the video-based player profiles BD-Video are required to have a full implementation of BD-J, with varying levels of hardware support.

It can either be built-in memory or removable media, such as a memory card or USB flash memory. The first Blu-ray Disc album to be released was Divertimenti , by record label Lindberg Lyd, and it has been confirmed to work on the PS3. BD-Live features have included Internet chats, scheduled chats with the director, Internet games, downloadable featurettes, downloadable quizzes, and downloadable movie trailers. With the exception of the latest players and the PlayStation 3 , Profile 1.

As with the implementation of region codes for DVDs, Blu-ray Disc players sold in a specific geographical region are designed to play only discs authorized by the content provider for that region. This is intended to permit content providers motion picture studios, etc. Movie studios have different region coding policies. Among major U. In circumvention of region coding restrictions, stand-alone Blu-ray Disc players are sometimes modified by third parties to allow for playback of Blu-ray Discs and DVDs with any region code.

Unlike DVD region codes, Blu-ray region codes are verified only by the player software, not by the optical drive's firmware. The Blu-ray Disc format employs several layers of digital rights management DRM which restrict the usage of the disks. Blu-ray equipment is required to implement the High-bandwidth Digital Content Protection HDCP system to encrypt the data sent by players to rendering devices through physical connections.

This is aimed at preventing the copying of copyrighted content as it travels across cables. In order to ease the transition to high definition formats, the adoption of this protection method has been postponed until Since the appearance of the format on devices in , several successful attacks have been made on it. The first known attack relied on the trusted client problem.

In addition, decryption keys have been extracted from a weakly protected player WinDVD. Since keys can be revoked in newer releases, [ ] this is only a temporary attack, and new keys must continually be discovered in order to decrypt the latest discs. This cat-and-mouse game has gone through several cycles. Such programs can: [ ]. These programs can then be included in all new content releases. BD-ROM Mark is a small amount of cryptographic data that is stored separately from normal Blu-ray Disc data, aiming to prevent replication of the discs.

The cryptographic data is needed to decrypt the copyrighted disc content protected by AACS. During replication, this ROM Mark is transferred together with the recorded data to the disc. In consequence, any copies of a disc made with a regular recorder will lack the ROM-Mark data, and will be unreadable on standard players.

AVCHD was originally developed as a high definition format for consumer tapeless camcorders. The Blu-ray Disc Association BDA created a task force made up of executives from the film industry and the consumer electronics and IT sectors to help define standards for putting 3D film and 3D television content on a Blu-ray Disc. Sony has released a firmware upgrade for PlayStation 3 consoles that enables 3D Blu-ray Disc playback. It previously released support for 3D gaming on April 21, [ ] followed by the availability of 3D movies.

Since the version 3. Chat WhatsApp. Optical disc Optical disc drive Optical disc authoring Authoring software Recording technologies Recording modes Packet writing. Optical media types. See also.

History of optical storage media High definition optical disc format war. Main article: Blu-ray Disc recordable. Main article: BD-J.

Blu-ray portal. Retrieved on Retrieved AV Watch. February 19, Page 1. November 1, With the introduction of high-definition HD video, there was simply too much information for the DVD to handle.

The Blu-ray disc, which is a high-density optical disc, was invented as a way to store the large amounts of data that HD video creates. Problem solved, right? Well, pretty much, but Blu-ray didn't just happen overnight. Blu ray technology had a long history to become as widely accepted as it is today, and it's just getting started. In this article, I am going to cover Blu-ray technology history, including its invention, launch, and epic battle with the HD DVD format. Hopefully this will alleviate some of the mysteries that surround this up-and-coming technology, because let's face it, HD video isn't going anywhere.

Contrary to what you might think, the name 'Blu-ray' wasn't just some marketing ploy to make you want to buy the movie industry's cool, new movie discs.

The name is derived from the blue-violet laser used to read the disc, although marketers did jazz it up a bit by dropping the 'e' off of the word 'blue'. This seemingly minor difference is what allows Blu-ray discs to store almost 10 times the amount of data a DVD can store.