actually , blu ray movies don't play at 36 mbpsec it's 54 mbpsec
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Blu-ray FAQ | |
General | |
| 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 1.15 | What is Blu-ray? Why the name Blu-ray? Who developed Blu-ray? What Blu-ray formats are planned? How much data can you fit on a Blu-ray disc? How much video can you fit on a Blu-ray disc? How fast can you read/write data on a Blu-ray disc? What video codecs will Blu-ray support? What audio codecs will Blu-ray support? Will Blu-ray discs require a cartridge? Will Blu-ray require an Internet connection? Will Blu-ray down-convert analog outputs? Will Blu-ray support mandatory managed copy? When will I be able to buy Blu-ray products? What will Blu-ray products cost? |
Blu-ray vs DVD | |
| 2.1 2.2 2.3 2.4 2.5 2.6 | Will Blu-ray replace DVDs? Will Blu-ray be backwards compatible with DVD? Why should I upgrade from DVD to Blu-ray? What is the difference between Blu-ray and DVD? Will Blu-ray replace VCRs? What about Blu-ray for PCs? |
Blu-ray vs HD-DVD | |
| 3.1 3.2 3.3 | Is Blu-ray the same thing as HD-DVD? What benefits does Blu-ray offer compared to HD-DVD? What is the difference between Blu-ray and HD-DVD? |
Blu-ray movies | |
| 4.1 4.2 4.3 | Is Lord of the Rings coming to Blu-ray? Is Star Wars coming to Blu-ray? Is <insert movie> coming to Blu-ray? |
General | |
| 1.1 | linkWhat is Blu-ray? |
Blu-ray, also known as Blu-ray Disc (BD) is the name of a next-generation optical disc format. The format was developed to enable recording, rewriting and playback of high-definition video (HD), as well as storing large amounts of data. The format offers more than five times the storage capacity of traditional DVDs and can hold up to 25GB on a single-layer disc and 50GB on a dual-layer disc. For more general information about Blu-ray, please see our What is Blu-ray? section. | |
| 1.2 | linkWhy the name Blu-ray? |
The name Blu-ray is derived from the underlying technology, which utilizes a blue-violet laser to read and write data. The name is a combination of "Blue" (blue-violet laser) and "Ray" (optical ray). According to the Blu-ray Disc Association the spelling of "Blu-ray" is not a mistake, the character "e" was intentionally left out so the term could be registered as a trademark. | |
| 1.3 | linkWho developed Blu-ray? |
The Blu-ray Disc format was developed by the Blu-ray Disc Association (BDA), a group of leading consumer electronics, personal computer and media manufacturers, with more than 180 member companies from all over the world. The Board of Directors currently consists of: | |
| 1.4 | linkWhat Blu-ray formats are planned? |
As with conventional CDs and DVDs, Blu-ray plans to provide a wide range of formats including ROM/R/RW. The following formats are part of the Blu-ray Disc specification: | |
| 1.5 | linkHow much data can you fit on a Blu-ray disc? |
A single-layer disc can hold 25GB. | |
| 1.6 | linkHow much video can you fit on a Blu-ray disc? |
Over 9 hours of high-definition (HD) video on a 50GB disc. | |
| 1.7 | linkHow fast can you read/write data on a Blu-ray disc? |
According to the Blu-ray Disc specification, 1x speed is defined as 36Mbps. However, as BD-ROM movies will require a 54Mbps data transfer rate the minimum speed we're expecting to see is 2x (72Mbps). Blu-ray also has the potential for much higher speeds, as a result of the larger numerical aperture (NA) adopted by Blu-ray Disc. The large NA value effectively means that Blu-ray will require less recording power and lower disc rotation speed than DVD and HD-DVD to achieve the same data transfer rate. While the media itself limited the recording speed in the past, the only limiting factor for Blu-ray is the capacity of the hardware. If we assume a maximum disc rotation speed of 10,000 RPM, then 12x at the outer diameter should be possible (about 400Mbps). This is why the Blu-ray Disc Association (BDA) already has plans to raise the speed to 8x (288Mbps) or more in the future."
it's hd-dvd that had a data rate of 36 mbsec , another reason it was a flop i guess | |