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The term resolution defines an important concept for the video, and there is much confusion about what it means and what really stands for. To make matters worse, when we started to get used to terms like 1080p and 720p, the world of technology decides to step forward and begin to popularize the 4K as a new resolution.

To get away with doubts and throw yourself into this world we are going to explain over and a simple way what it means and what the resolution 4K.

Let’s start with some history, which is how best understand these things, because everything, including the names come from others that have been used before. As technology evolves and is something that inherited characteristics of what came before, it is often important to know a bit what has preceded to better understand what we have now.

The first TV worked through a cathode ray tube, abbreviated and known by its acronym in English CRT. They were shooting a ray from behind the screen moving at high speed and went over the monitor and painting lines literally. The number of lines painted every time I ran a full screen was the first concept of resolution. Also we derive the concept of fps or frames per second, and this time was limited to 25 because it was difficult for a mechanical tube thrilling through the screen 25 times every second painting in each step some 575 lines.

Also born here also the leading and progressive concepts that are the letters that we now see next to the number and 1080i and 1080p, and originally was because we had to solve the so-called flicker effect, giving rise to problems of dizziness view the images on television, and what he did was to divide the images into two, ie, continued to show 25 frames per second, but each of these was shown in two halves, so the frequency was 50fps. Showing how to solve each image into two halves was known as line spacing, and repeating progressive images.

Which brings us finally to the modern decisions, that is what interests us today. When digital technology began to replace analog displays continued defining its resolution by the vertical lines that this was, but now there were lines, but pixels. That is, when we say a film is at 720 or 1080 we are talking about the resolution or the number of vertical pixels is 720 pixels or 1080 respectively, and if this is i or p is that it is leading or progressive.

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