Is Blu-ray faster than DVD?
How does a Blu-Ray player read a disc?
Angular Speed of a DVD
DVD (digital video disc) is a technology based on optical data storage similar to compact disc (CD). Analog information is converted into digital information, which is then encoded onto the disc from the inside edge out. Digital data are encoded by means of pits on the recording layer of the disc.
A Digital Versatile Disc or Digital Video Disc (DVD) is similar to a CD-ROM in that you can only read data from it. The main difference is that the DVD can store much more data than a CD-ROM, CD-R, or CD-RW. The data on a DVD+RW disc can be erased and recorded over numerous times.
Blu-ray uses a different type of laser to read the discs, allowing a single disc to store more data. As Blu-ray can store more data, it can provide a much better picture and audio quality compared to the DVD format.
The 24x speed is probably the fastest DVD drive youll find, that hasnt changed in years.
Blu-ray Disc recordable The current practical maximum speed for Blu-ray Discs is about 12× (54 MB/s). Higher speeds of rotation (5,000+ rpm) cause too much wobble for the discs to be written properly, as with the 24× (33.2 MB/s) and 56× (8.2 MB/s, 11,200 rpm) maximum speeds, respectively, of standard DVDs and CDs.
Blu-ray disc? 847 MB for a typical CD, a DVD can hold 4.7 GB of data, and a single layered Blu-ray can hold 25 GB of data.
DVD drives The original speed rating for DVDs is different. For a DVD, 1x is 1352.54KB/second (that’s a bit over the 9x CD drive speeds). Following the convention, 2x for a DVD drive is 2,705KB/second, 4x is 5,410KB/second, 8x is 10,820KB/second, and 16x would be 21,640KB/second.
Blu-ray or DVD: which has the faster read speed? The different methods put Blu-ray at a staggering advantage in the future, but currently 1x and 2x Blu-ray drives trudge along compared to a 12x DVD drive, which gathers information at a rate of 8.2 – 16.5 megabytes per second (depending on the amount of data stored).