Gb86’s Weblog


Blu ray, HD and the PS3
January 12, 2009, 4:00 am
Filed under: Uncategorized

What exactly is Blu-ray? 

“It is the name of a next-generation optical disc format jointly developed by the Blu-ray Disc Association (BDA).  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.  This extra capacity combined with the use of advanced video and audio codecs will offer consumers an unprecedented HD experience.”  (http://www.blu-ray.com/info/)

The reason why it is called Blu-ray is due to the laser which reads the disk being blue as apposed to the normal DVD laser reader being red.  By using a blue laser it means that the precision of it is higher, thus, enabling the disk to have more data on it but still the disk is just the same size as a regular DVD. 

What is HD?

HD stands for high definition, “HD is the latest in a long line of major improvements in television technology, which has moved from black-and-white analogue to wide-screen colour digital over the last 50 years.

HD gives you exceptionally clear, crisp pictures with vivid colours and up to five times more detail than standard definition.  HD provides a massive improvement in picture resolution, creating more vibrant images and an immersive viewing experience.”

(http://www.bbc.co.uk/bbchd/what_is_hd.shtml)

blu-ray-hd-dvd-discs

At the least, HDTV has twice the linear resolution of standard-definition television (SDTV), thus showing greater detail than either analog television or regular DVD.  The technical standards for broadcasting HDTV also handle the 16:9 aspect ratio images without using letter-boxing or anamorphic stretching, thus increasing the effective image resolution.

The optimum format for a broadcast depends upon the type of video-graphic recording medium used and the image’s characteristics.  The field and frame rate should match the source and the resolution.  A very high resolution source may require more bandwidth than available in order to be transmitted without loss of fidelity.  The lossy compression that is used in all digital HDTV storage and transmission systems will distort the received picture, when compared to the uncompressed source.

sony_playstation203202020gb

The Playstation3 (PS3) is the newest console to be brought onto the market.  It competes with the Microsoft XBox 360 and the Nintendo Wii in the seventh generation of video game consoles.

A major feature of the PS3 that distinguishes it apart from the others is that it has an online gaming network known as the Playstation Network.  In this network users are able to make their own character, similar to that in the Sims, and walk around a virtual world chatting to other users all over the world.  Another of its features is that it is the only console which is compatible with the Blu-ray disk.

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