Introduction to the concept of “Resolution.” We are all familiar with digital photography. We buy houses from 5 to 10 megapixels, and note with satisfaction that the more pixels, the bigger we can make a photo, enlarged to poster size. With the same thing happens. 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 televisions, generally small, that have lived in our homes in the last 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 displayed on TVs as large as a 1-megapixel photo can not take it too great an extension. And here is where the idea stage to change the video system, to modernize and adapt to the new television and broadcasting systems. What is HD? High definition is the modernization of the international video. Basically, going to have a resolution, or quality of 0.4 megapixels to 2 megapixels. Perhaps he may not seem too increase, considering that the cameras reach much higher resolutions, but we must bear in mind that the video moves 25 frames per second.