WEBVTT 00:00.080 --> 00:01.220 Blu ray disc. 00:01.460 --> 00:04.250 The current standard for removable disc media. 00:04.280 --> 00:10.130 The Blu ray disc gets its name from the color of the laser used to read from and write to the disc. 00:10.160 --> 00:17.000 Due to the high capacity storage of Blu ray discs, high definition HD content can easily be stored 00:17.000 --> 00:20.030 on Blu ray discs without a loss in quality. 00:20.390 --> 00:23.380 Diameter 120mm. 00:23.390 --> 00:25.760 Same as a CD and DVD. 00:26.360 --> 00:28.520 Type of laser used to write data. 00:28.520 --> 00:31.040 405 m Blu laser. 00:31.770 --> 00:38.580 Maximum capacity of a DVD, 27GB and 50GB, double layer Blu ray. 00:38.850 --> 00:45.990 The Blu ray disc, BD, often known simply as Blu ray, is a digital optical disc storage format. 00:46.020 --> 00:52.950 It is designed to supersede the DVD format and capable of storing several hours of high definition video. 00:52.980 --> 00:57.630 HDTV 720 and 1000 and ATP. 00:57.870 --> 01:04.080 The main application of Blu ray is as a medium for video material such as feature films and for the 01:04.080 --> 01:09.930 physical distribution of video games For the PlayStation three, PlayStation four, PlayStation five, 01:10.140 --> 01:12.930 Xbox One and Xbox Series X. 01:12.960 --> 01:19.260 The name Blu ray refers to the blue laser, which is actually a violet laser used to read the disc, 01:19.260 --> 01:24.870 which allows information to be stored at a greater density than is possible with the longer wavelength 01:24.870 --> 01:27.090 red laser used for DVDs. 01:27.300 --> 01:40.030 The polycarbonate disc is 120mm, 4.7in in diameter and 1.2mm 0.047in thick, the same size as DVDs 01:40.030 --> 01:41.110 and CDs. 01:41.230 --> 01:50.260 Conventional or pre bdxl Blu ray discs contain 25GB per layer with dual layer discs, 50GB being the 01:50.260 --> 01:53.320 industry standard for feature length video discs. 01:53.440 --> 01:54.880 Triple layer discs. 01:54.880 --> 01:58.030 100GB and quadruple layered discs. 01:58.030 --> 02:07.630 128GB are available for Bdxl Rewriter Drives High definition HD video may be stored on Blu ray discs 02:07.630 --> 02:18.280 with up to 1920 x 1080 pixel resolution at 24 progressive or 50/60 interlaced frames per second. 02:18.310 --> 02:31.200 DVD video discs were limited to a maximum resolution of 480 NTSC 720 x 480 pixels or 576 lines curved 02:31.210 --> 02:33.340 625/50. 02:33.340 --> 02:39.190 720 x 576 pixels commonly used with pal. 02:39.400 --> 02:45.580 Besides these hardware specifications, Blu ray is associated with a set of multimedia formats. 02:45.820 --> 02:51.970 The BD format was developed by the Blu ray Disc Association, a group representing makers of consumer 02:51.970 --> 02:55.420 electronics, computer hardware and motion pictures. 02:55.450 --> 03:02.140 Sony unveiled the first Blu ray disc prototypes in October 2000, and the first prototype player was 03:02.140 --> 03:05.200 released in Japan in April 2003. 03:05.410 --> 03:12.480 Afterward, it continued to be developed until its official worldwide release on June 20th, 2006, 03:12.490 --> 03:19.570 beginning the high definition optical disc format war where Blu ray disc competed with the HD DVD format. 03:19.720 --> 03:27.670 Toshiba, the main company supporting HD DVD, conceded in February 2008 and later released its own 03:27.670 --> 03:30.910 Blu ray disc player in late 2009. 03:31.210 --> 03:36.760 According to media research, high definition software sales in the United States were slower in the 03:36.760 --> 03:39.730 first two years than DVD software sales. 03:39.760 --> 03:46.670 Blu ray faces competition from video on demand, VOD and the continued sale of DVDs. 03:46.690 --> 03:55.630 In January 2016, 44% of US broadband households had a Blu ray player for playback of 4K content. 03:55.660 --> 04:00.640 The BDA introduced a variant of Blu ray called Ultra HD Blu ray.