What is High Definition?

Introduction to the concept of "resolution"

Everyone is familiar with digital photography. Buy chambers 5 and 10 megapixels, and note with satisfaction that the more pixels, the bigger we can make the picture, extending up to poster size.

In the audiovisual world is the same. For over 50 years, the global audiovisual law has established that the video has a resolution of 0.4 megapixels. And as happened with the old cameras, the size of the image could not be done too great.

This was true for the old tube TVs, usually small, that have populated our homes in recent decades. But modern technology has led to the emergence of new and modern plasma and LCD TVs with a size never seen before. Thus, large screens of 37 inches, 42 inches and up to 47 inches are common in electronics stores.

But the video, with its modest 0.4-megapixel resolution, can not stand either be viewed on TVs as big as a 1-megapixel picture can not take it too great an extension.

And this is where the idea comes into play to change the video system, to modernize and adapt to new systems and broadcast television.

What is HD?

High definition is the modernization of the international video. Basically, going to have a resolution, or quality of 0.4 megapixels, 2 megapixels.

Perhaps he may not seem too increase, given that the cameras reach much higher resolutions, but keep in mind that the video moves 25 frames per second.

Thus, the size of a video image increases from around 800 × 600 pixels (the current system) to 2,000 x1000 pixels. This is the famous Full HD, 1000 lines of resolution.

It should be noted also defined an intermediate system with a resolution of 1 megapixel. (1,400 x 800 pixels, approx.)

Also studied and new resolutions and larger image sizes, up to 4 megapixels, but is unlikely to see the light in the domestic market, since to enjoy high definition is necessary to have adequate equipment.

Can we see high definition?

To enjoy it you must have a TV ready for those resolutions. That is, a Full HD TV (capable of displaying on screen 2 megapixel images or 2,000 x 1,000 pixels), or an HD ready TV capable of displaying 1 megapixel. (Recall that the old system is 0.4 megapixels, and that the higher resolution, higher image quality)

A current problem is that virtually any TV station broadcasts in HD. Only one satellite pay channel does. Therefore, despite having a modern TV HD ready, we can not see the television broadcasts of conventional HD channels, as no issue with that quality.

Furthermore, it is noteworthy that the introduction of DTT, ie, DTT, is not going to broadcast in HD. Simply change the broadcast system, but not the resolution or image size. It will look better because it will be digital (Like a DVD is better than VHS), but it will not be HD. To date there is no clear timetable for the HD broadcast in conventional chains.

So to see something in HD, the clear choice is to go through the Blu-Ray system.

The Blu-Ray is the successor of DVD. Its main feature is that this time, yes, it is in HD. If you connect a Blu-Ray player to a TV HD Ready or Full HD can finally enjoy the incredible picture quality of HD content.

Then enough to buy a Blu-Ray (which are down significantly in price already, in March 2009 for 300 Euros), connect the TV and put a Blu-Ray.

Some of the latest game consoles (PS3) players feature high-definition video.

Is this it benefit my company?

For a company, the advantage of making a video in HD is obviously that you can project it on a TV Plasma or LCD with much higher quality (up to 4 times) using a Blu-Ray. It is ideal therefore for playback on fairs and in general on large screens (halls, presentations, meeting rooms, etc.).

Gradually, the Blu-ray will also widespread in the computing environment, with frequent and see notebooks with this technology, so in the near future productions will usually deliver in this format.

Texel video producer has made the leap in 2007 to HD production, with more than one year fully prepared for the production of corporate content in HD, either to deliver on Blu-Ray or Web pages through new WMV HD or H.264 codecs.



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