HP DVD+Writer DVD 100i

[bcunha]

What's Blu-ray Disc

Basic technical information
By employing a short wavelength blue violet laser, the Blu-ray Disc successfully minimizes its beam spot size by making the numerical aperture (NA) on a field lens that converges the laser 0.85. In addition, by using a disc structure with a 0.1mm optical transmittance protection layer, the Blu-ray Disc diminishes aberration caused by disc tilt. This also allows for disc better readout and an increased recording density. The Blu-ray Disc's tracking pitch is reduced to 0.32um, almost half of that of a regular DVD, achieving up to 27 GB high-density recording on a single sided disc.
Because the Blu-ray Disc utilizes global standard "MPEG-2 Transport Stream" compression technology highly compatible with digital broadcasting for video recording, a wide range of content can be recorded. It is possible for the Blu-ray Disc to record digital high definition broadcasting while maintaining high quality and other data simultaneously with video data if they are received together. In addition, the adoption of a unique ID written on a Blu-ray Disc realizes high quality copyright protection functions.

The Blu-ray Disc is a technology platform that can store sound and video while maintaining high quality and also access the stored content in an easy-to-use way. This will be important in the coming broadband era as content distribution becomes increasingly diversified. The ten companies involved in the announcement will respectively develop products that take full advantage of Blu-ray Disc's large capacity and high-speed data transfer rate. They are also aiming to further enhance the appeal of the new format through developing a larger capacity, such as over 30GB on a single sided single layer disc and over 50GB on a single sided double layer disc. Adoption of the Blu-ray Disc in a variety of applications including PC data storage and high definition video software is being considered.


Concept, Main Features and Specifications


Concepts of the format establishment
To realize the large capacity with 12cm disc

- More than 2-hour high definition video recording

- High capacity of more than 4-hour recording by double layer technology.

To cope with digital broadcasting

- High compatibility with digital broadcasting

- To prevent illegitimate duplication of contents

To enhance the Blu-ray Disc world

- Adoption of the Blu-ray Disc in variety of media and applications



Main Features of Physical Format
Large capacity : up to 27GB

405mn blue-violet laser, lens numerical aperture (NA) 0.85,

optical transmittance protection layer : 0.1mm

High speed transfer rate : 36Mbps

High quality video recording for high definition broadcasting or high definition video content captured on a digital video camera.





Main Features of Logical Format
Highly compatible with digital broadcasting

MPEG2 transport stream compression technology for video recording can record digital broadcasting including HDTV while maintaining its original picture quality.〿

Best data structure for disc recording

Achieving improvement of searching, easy editing functions and play a list playback functions by adapting logical data structure making the best use of random accessing.

File system for HDTV real time recording

Adapting the file system which can achieve high bit rate recording and playback of HDTV and best use of disc space.



Main Specifications
Recording Capacity 23.3 / 25 / 27 GB
Laser Wavelength 405nm (Blue Violet Laser)
NA: Numerical Aperture 0.85
Data Transfer Rate 36Mbps
Disc Diameter 120mm
Disc Thickness 1.2mm (Protection Layer : 0.1mm)
Recording Format Phase Change
Tracking Format Groove Recording
Video Recording Format MPEG2 Video
Audio Recording Format AC3, MPEG1 Layer2, Others
Multiplexing MPEG2 Transport Stream


Podem ler mais em:

http://www.blu-raydisc.info/

[bcunha]

Aqui está uma review:

http://www.digit-life.com/articles2/blu-ray/index.html

[Joesoft]

Sim, os "blue-ray" vão sair kaundo eu for velhinhu e andar de vengala, né ??





Cumps

[alatakontigu]

lol isso já depende da tua idade espero que já sejas velhote

[bcunha]

Não sei se já serás velhinho, de bengala não precisas de ser velhinho
Mas segundo a Sony, estes só serão vendidos cá na Europa em 2004/5, para estar massificado leva um pouco mais, por isso, é só fazer as contas.
Se achas que vale a pena esperar 2 anos ou mais...

[Joesoft]

Nao pintem o meu calebo de branco, tenhu só 23 anus !!

Foi apenas uma hipérbole !

lol