Two more Dimensions to Digital Storage!!!

Now this is a milestone fellows!!! This was what I was waiting for...finally read this article through a thumbs up!!! Thght you must know...Check it out!!!

Can you see 5 dimensions? Can you even imagine what they could be like? Well some people still manage to think 5D. At the Centre for Micro-Photonics at the Swinburne University of Technology in Victoria, Australia reasearch led by its director Min Gu has lead to the development of a new material on which data can be stored in 5 dimensions.

Five dimensions
may seem absurd, but dimensions here represent how many parameter are used in locating the data. in Today we have CDs, DVDs, and Blu-Ray discs which store data in two dimension (or 3). In CDs the data is stored in a spiral, with the two dimensions being those of the surface of recording. With DVDs and Blu-Rays there is the additional concept of layers, which add another dimension to data storage, but not by much. Holographic discs, which are still under development store data in 3 dimensions by having hundreds or thousands of layers instead of just 2 or 4.

The new material can be used to store data 5 dimensionally, using the three spatial dimensions (the 2D surface, and the layers), with the two additional dimensions being the polarization of the laser used to store data and its wavelength. Needless to say this can have a huge impact on how much data we can cram into the discs of tomorrow.In their studies they used 3 different wavelengths and two different polarizations to achieve a density as great as 1.1 terrabyte per square inch!

With each additional dimension the storage capacity increases greatly. Taing Blu-Ray for example, with an increase in layers, the storage is increased to twice its size (50GB) using two layers, or quadrupled by using 4 layers (100GB). If now the parameter of wavelength is introduced, then by using just 3 different wavelengths as done in their study, the storage capacity of a quad-layer BluRay becomes 300GB. With the added parameter of polarization, with two possible polarizations, we can double the capacity to 600GB, for our quad-layer, triple-wavelength, dual-polarization disk.

This material is made up of "layers of gold nanorods suspended in clear plastic spun flat on a glass substrate". According to Min Gu. "You can record each bit by one laser pulse, The writing laser melts and reshapes the gold particles, which are less than 100 nanometers long. The changes affect how the nanorods interact with light from a laser-imaging system, allowing the data to be read."

And now we are trading in Blu-RAYS!!!

What is the difference between full HD and HD ready?

What is the difference between full HD and HD ready? Hmm...Even I used to get this question pretty frequently! I got this golden article in a magazine and thought would share it with you guys. It was always a confusion between both as they look similar! Honestly, they are more in terms of a marketing strategy. But still if you wanna know the difference,

Full HD usually means video playback at 1080p,which means 1080 horizontal lines with
progressive scanning. HD ready usually means 720p or 1080i, where ‘i’ stands for interlaced scanning.
In terms of pixels, a line resolution of 1080 should guarantee a video output resolution of 1920 x 1080 (vertical x horizontal pixels). If you know, every screen or frame of a TV broadcast is made up of multiple horizontal lines that form a complete picture or frame.

Interlaced resolutions mean that only every alternate line of the video is being shown in one single frame at one time. This means only half the resolution of 1920 x 1080 will be on the screen at one time; if you were to number them all you would first see all the odd-numbered lines and then all the even-numbered ones. They are switched so rapidly that the eye constructs a single continuous image, but effectively you are watching your videos play at reduced quality.
Full HD (1080p) includes the lower specified resolutions, but also adds the ability to display all 1080 lines for each frame, instead of just alternating halves. The entire screen area of 1920 x 1080 pixels will be active at all times.

Videos playing at 1080p will have more detail and better overall quality."HD ready" displays are therefore cheaper than Full HD, and are usually the only choice with smaller sized panels. In any case, these displays are usually not used to their full potential in India as HD TV broadcasts are unavailable, and Blu-Ray discs are still quite expensive.

Ref: Chip

Check out the following link for an in-depth explanation of HD:
http://en.wikipedia.org/wiki/High-definition_television