Not so long ago, as children, we listened with our moms and dads to old-fashioned phonograph records, and the overall radio was the latest fashion. Very little time passed, and audio cassettes appeared, then audio CDs and MP3 discs. We didn’t have time to get used to everyday media players, as smart TVs appeared, capable of broadcasting video from flash drives and from the Internet. One of the latest, rapidly gaining popularity of new products is Blue-ray. What is Blu-ray and what is the peculiarity of this technology - this will be discussed in our article.
Blue ray
This is how the name of the latest development of the BDA (Blu-ray Disc Association) is translated - a group of the world's leading developers of communications, personal computers and electronics. What is a blue ray? This is the format of the new latest-generation optical disc , which was invented specifically to facilitate the playback, recording and dubbing of high-resolution video files, as well as for the convenience of storing voluminous information. In order to make it clearer, we will use the language of numbers and give some comparisons. To understand what Blu-ray is, imagine a DVD-ROM that holds information more than five times larger than usual. Thanks to the new development, up to 25 GB (if it is single-layer) or up to 50 GB of data can now be written to it. And this is not to mention the fact that this technology is being improved and there is already support for the layering of such disks.
The Blu-ray format is based on the new standard, which provides for reading data using a blue (to be precise, purple) laser, whose
wavelength is 405 nanometers. This explains the name incomprehensible to many. The wavelength of 780 nanometers is used for reading old CD-ROM discs, and 650 nm for newer DVDs. Such a decrease allowed at one time to increase the capacity from 700 MB to 4.38 GB (twice as much on two-layer). Talking about what Blu-ray is, it is worth mentioning that this format allows you to write / read data at a speed of at least 36 Mbit / s!
History of invention
Work on a new format began back in 2000. One of the first to start doing this was Sony Corporation. Initially, the development went in two parallel directions: DVR Blue and UDO (short for Ultra Density Optical). Subsequently, the first technology was renamed the "blue beam", i.e. Blu-ray In the same year, the first prototypes were released and at CREATEC people first learned what Blue Ray is. The official announcement happened in 2002 and after that the BDA was created, the purpose of which was to promote the new format. Toshiba Corporation decided not to adjoin this alliance and, together with NEC, began to develop its own version of a super-accommodating disc. In the same 2002, these companies announced the Advanced Optical Disk, which was later renamed the HD DVD format.
The victory in this confrontation went to Blu-ray technology and since then, sales of discs of this kind have been steadily gaining momentum. Outwardly they look the same as usual DVDs. But the
quality of the video, which, thanks to its high capacity, can be recorded on them (especially if it is Blue-Ray 3 D), is so different from what we saw earlier that literally everyone who ever sees it, in the future, prefers to watch the video only in this excellent format.