Blu-Ray like BD is a more commonly known name for the Blu-Ray Disc developed and championed by Sony as the successor to the DVD format.  With up to 50GB of storage available on a dual layer disc this format is typically used for Hi-Def Video and data storage applications.

Where did the name Blu-Ray come from?

The reading and writing of the Blu-Ray disc is taken care of by a blue laser and this is what led to the naming of the disc format.  To look at the Blu-Ray disc is identical in it’s physical shape and size to a DVD or audio CD.

The Blu-Ray laser operates on a shorter wave length to traditional DVDs which use a red laser and this goes some way to allowing the storage of nearly 6 times as much data as a DVD.

Who is responsible for the Blu-Ray format?

Blu-Ray was triumphant in a format war that mirrored the 80′s Betamax vs VHS tape formats.  HD DVD was the other contender in the Hi-Definition format war but in February 2008 it’s main supporter Toshiba threw in the towel which brought an end to battle.

The Blu-Ray Disc Association is a group of manufacturers and film studios who are tasked with developing the Blu-Ray format going forward.

How popular is Blu-Ray

The following table represents the availability of Blu-Ray disc titles as at January 2009:

Country Available Titles
United Kingdom 1410
United States of America 1500
Australia 890
Japan 720

What are the Blu-Ray Disc technical specifications?

Media Type High Density Optical Disc
Encoding MPEG-2, H.264/MPEG-4 AVC, and VC-1 Capacity
Capacity Single Layer – 25GB, Dual Layer – 50GB
Block Size 64kb
Read Mechanism 405 nanometres Blue Laser:

  • 1× at 36 Mbit/s (4.5 Mbyte/s)
  • 2× at 72 Mbit/s (9 Mbyte/s)
  • 4× at 144 Mbit/s (18 Mbyte/s)
  • 6× at 216 Mbit/s[1] (27 Mbyte/s)
  • 8× at 288 Mbit/s (36 Mbyte/s)
  • 12× at 432 Mbit/s (54 Mbyte/s) Resolution 1080p Full HD
Developed by Blu-Ray Disc Association
Usage
  • Data Storage
  • High Definition Video
  • High Definition Audio
  • PlayStation 3 Games

Are Blu-Ray Discs Region Encoded?

Like the DVD, Blu-Ray discs can be region encoded to restrict the availability of certain titles to region specific hardware.

The region coding for Blu-Ray discs is:

  • A: East Asia (except Mainland China and Mongolia), Southeast Asia, the Americas and their dependencies.
  • B: Africa, Southwest Asia, Europe (except Russia), Oceania and their dependencies.
  • C: Central Asia, East Asia (Mainland China and Mongolia only), South Asia, central Eurasia (including Russia) and their dependencies.

How long does it take to record a Blu-Ray disc?

The table below gives typical details of how long it will take to write a Blu-Ray disc using your Blu-Ray Recorder:

Drive speed

Data rate

Write time for Blu-ray Disc in minutes

Mbit/s

MB/s

Single Layer

Dual Layer

1x

36

4.5

90

180

2x

72

9

45

90

4x

144

18

23

45

6x

216

27

15

30

8x

288

36

12

13

12x

432

54

8

15

Where can I learn more about Blu-Ray?

If you are still left looking for answers about Blu-Ray then please visit the official website of Blu-Ray at Blu-Ray Disc

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