What is HD?

Introduction to the concept of "Resolution"

In our colloquial language are used to discuss the definition of a photograph or a digital image, referring to the greater or lesser clarity with which its details are displayed. The same happens with the video, but to understand this concept in depth, you need to learn, like playing a video sequence of images that way.

The foundation of any audiovisual production is reduced to the fact you play a certain number of consecutive still images, fast enough for our own eye is not able to identify these images as individual but as a whole, in motion. To "trick" to our eye was found to be sufficient to give that feeling of continuity in individual images, to reproduce more than 15 pictures a second.

Upon discovering that the human eye can detect fluctuations of light from one image to the next, we decided to reproduce the same image twice in the same time, dividing its contents into two subimágenes (also called "image field") is, divide each image into a number of horizontal lines (horizontal resolution) and realize, first all the odd lines of an image, and then the even lines. We are talking about the scanning.

Currently, and after elaborate processes of standardization, our televisions (in Europe) played a total of 25 images per second and thus 50 fields per second (odd field, comprising the odd lines of an image, and the pair field formed by the lines). The standard resolution video is 576 horizontal lines.

What is HD?

From the above explanation we can begin to get an idea of what it will mean high-definition: the increase in the number of lines of each of the images that form a video.

If the majority of our television sets now reproduced resolutions 576i (576 horizontal lines, so interlaced) high-definition television sets (with the distinctive "HD Ready") can play 720p resolutions (720 horizontal lines of progressive, not interlaced) and 1080i (1080 horizontal lines per image, so interlaced).

We began to hear talk of high definition (Full HD or True HD) that goes one step further: plays 1080p resolutions, which are images with 1080 horizontal lines in progressive mode, ie without dividing them into two subimágenes .

Progressive scan versus interlaced reproducing the 50 "half images" per second, is able to play 50 full frames per second, thereby eliminating any perceived flicker and doubles the number of reproduced images per second.

Can we see high definition?

Of course, in order to see video images of high definition televisions will be required to be able to reproduce. As discussed in this article are those with distinctive HD Ready or Full HD on their screens.

One problem today is that no TV network broadcasts in HD, so HD televisions do not reach their full potential, and that emissions are made with 576 lines. From nmomento except Canal + HD broadcasts of the Euro, there are no plans to broadcast in HD channels, due to increased bandwidth means that the broadcast content in high definition. When DTT (Digital Terrestrial Television) introduction, perhaps the time when TV stations start broadcasting in HD crop, but due to the broadcast in High Definition has a higher bandwidth, it is unlikely that perform assigned this transition in the short term.

Then, as seen in our new High Definition Plasma and plamante HD? You need to put to the test, to have video players capable of playing high-definition productions. Today, after a war of formats, the only viable is the BLU-RAY. Just then buy a Blu-Ray player (which are dropping dramatically in price, already in June 2008 for 300 Euros), the TV and put a Blu-Ray movie.

Some of the latest video game consoles include breeding high-definition video.

Does it benefit my company?

For a company, the advantage of putting a video in HD - Blu-Ray is clearly in a plasma will be much higher quality. It is ideal therefore for reproduction at fairs, and generally on large screens (halls, presentations, etc.).

Gradually, the Blu-ray is also widespread in the environment is often seen as laptops equipped with this technology.

The picture quality is four times higher than standard definition.

Texel video production company has made the leap in 2007 to production in High Definition, while for over a year fully prepared for the production of corporate content in HD, either to deliver Blu-Ray or through Web pages the new WMV HD and H.264 codecs.

Take the High Definition video for corporate audio-visual production for your company and provide a leap in quality to its customers and comentencia.