Blu-ray player

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Blu-rayPlayer is a form of media that has the ability to play Blu-rayDiscs. This type of disc was capable of storing a large amount ofdata and maintaining them in high-quality states. Blu-ray Player ismanufactured by Sony Corporation and was introduced to meet the needfor a device that can play High definition videos. This paperdiscusses the various element of and the evolutionthat it has undergone since its inception.

Historyof Blu-ray

Thetechnology of media has transformed gradually over the decade. Theproduction of Blu-ray Player was preceded by the CD player which wasintroduced in 1983 after the introduction of VHS in the late 1980`swhich necessitated the creation of a device that could store data andallow for its retrieval. The traditional CD was able to store bothaudio and visual content. However, the video stored were of lowquality. The creation of DVD later on allowed for the recording ofhigh-quality video even though they were delicate and not veryportable.In 2004, Sony launched Blu-ray play station. Blu-ray would introducea portable of media storage device known as Blu-ray disc. In 2012,the 3D Blu-ray Player was introduced to the market having a capacityto support 3D videos and normal discs (Breitenfeld,2015).

Inthe commercial overview, Blu-ray had a competitive advantage thatallowed it to dominate the market. It brought in something differentfrom the DVD, in that the Blu-ray disc in its design had a better andlarger storage capacity for HD video, a feature that was lacking inthe optical disc used in the CDs. The ‘blue` stands for the laserwhile the ‘ray` stands for the optical ray. The ‘e` was omittedfor readability. It was in the early 2000`s that UCSB CollegeProfessor Shuji Nakamura alongside Pioneer launched the ‘Blu-ray’project. Then, in 2004, the name was changed to Blu-ray DiscAssociation. With just two more years to fine tune thespecifications, the consumers welcomed the new product(Breitenfeld,2015).

TheBlu-ray Disc Association outcompeted Toshiba which was which was themajor producer of CD’s forcing to close down their manufacturingplant. The technological paradigm shift when top brand companies suchWarner embraced the products from the Blu-ray Disc Association, withthis switch, a precedence for Blu-ray technology was set. Top brandcorporates names such as Netflix, Best Buy, Walmart, Circuit City,Woolworths and PS3 game console followed suit and started usingBlu-ray disc and player. Eventually, Universal and Paramount Picturessupported the technology in their use for releasing movies.

HowBlu-ray works.

Currently,the Blu-ray disc comes in the single sided version which can hold upto 4.7 gigabytes on a disc constructed of a 1.1 mm thickpolycarbonate layer lying beneath a recording layer. Both are beneaththe optical transmission and protection layer. These layers are whatenables the laser to read the pits and bumps on the disc. Pits arespiral like grooves running from the centre of the disc while groovesare the other side. The closer the pits are, the more data there ison the disc. According to Breitenfeld (2015), smaller pits indicatea larger accuracy of the reading laser.

Blu-rayreads the data on the disc in various formats. BD-ROM is read onlyfor pre-recorded content. BD-RE is rewritable for HDTV recordingBD-RW which is rewritable for PC data storage and BD-R which isrecordable for storage (Breitenfeld,2015).

Figure1: Blu-ray versus DVD

Comparisonto other technologies

Inthe comparison to VHS at the very lowest item on the spectrum oftechnological evolution, it holds much more data with even higherdefinition – in the ranges of 2160 pixels. The disc is made of 120millimetres thick and 1.2-millimetre thick plastic. The Blu-ray discscontain 25 gigabytes per layer where triple layer discs beingavailable. With the presentation of the medium for video, theavailability of films and game consoles are responsible for Blu-ray`ssuccess.

Regardingstorage techniques, data on the DVD is compacted between a duopolycarbonate layers of 0.6mm thickness. When this data is by errorstored beneath the layer, birefringence occurs, and the laser lightis refracted into two separate beams. If these beams end up widelyspread as a result, data cannot be read. Disc tilt happens when thelaser beam becomes distorted by nature of the disc beingnon-perpendicular to the beam.


Mathhas a critical role to play as most of the measurements are expressedmathematically. For instance, the blue laser utilized in thetechnology possesses a wavelength of 405 nanometers. This muchsmaller beam that reads the pits that at times will containinformation 0.15 microns long. With the advantage of a reduced trackpitch of 0.32 microns, the ability of the Blu-ray disc to hold morethan 25 gigabytes is made possible with a small sized track pitchwith smaller pits and beams. With this in mind, the problem narrowsdown to this question: how many DVD discs can be replaced by a singleBlu-ray disc and how much better is the quality?

Accordingto Watson (2017), the cost of molding two discs together, adding therecording layer to one of the discs and gluing them together on asingle 1.1 mm disc thus reducing costs. The result is the price of aregular DVD.


Roleof the concepts

Theproblems of disc tilt and birefringence are eliminated by thepositioning of the recording layer closer to the objective lens andhaving the data on top of the layers. Blu-ray has a higher datatransfer rates enabling it to transfer up to 36 megabits per secondas compared to DVD with a rate of 10 megabits per second (Mbps).Also, the number of times over which a single disc can be replaced byBlu-ray is evidently in the multiples. The concepts contribute to thereduction of costs, increase in storage space and the improvement ofquality.

TheFuture of the Technology

Thefirst pace of technological advancement presents a threat to theBlu-ray technology which currently dominates the market. Thetechnology may become obsolete if the company fails to research onhow they can improve it. The future of the Blu-ray disc lays in theHVD (Holographic Versatile Disc). This technology will use a greenand red laser to read, write and position data. It could alsoincrease the storage capacity to terabytes.

Thedevelopment process of the technology involves testing two types ofdrives available modified optics and standard unaltered optics. Itis expected that the storage capacity of the disc will increase.Hitachi, for instance in 2009 produced 25 gigabytes per layer discPioneer, on the other hand, had released a 16 data layer disc with 25gigabytes of space on each. The peak, for now, is to anticipate oneterabyte of disc space (Breitenfeld,2015).

Inconclusion, the key concepts in the in the digital media device suchas in Video on Demand, Digital Entertainment Content eco-system,Keychest present a stiff competition to the Blu-ray technology. It isinteresting to see how it will cope up to avoid becoming obsolete in50 years to come as in the case of VHS, CD player and DVD.


Breitenfeld,&nbspD.(2015). Blu-Ray Versus Internet Movies. Handbook of DigitalImaging, 1-11. Retrieved from DOI: 10.1002/9781118798706.hdi058