To start with this article let us introduce you to the starting phase of television when people across the world viewed TV that worked using CRT (Cathode Ray Tube). Pictures in those TV were displayed by means of shooting electron uniformly on the TV screen preferably from left to right and then towards up and then downwards. As soon as these electrons hit the screen made of phosphors coating, the screen started glowing.
If you remember in the earlier TVs entire picture wasn’t displayed. Rather the top faded first and later the bottom appeared and vice-versa.
This was the reason manufacturers innovated a technology where the half cycle was refreshed after one cycle; this phenomenon was called interlacing, it definitely displayed better images. However, the major drawback was that images distorted and picture quality wasn’t good enough. This process continued for years but the longing for better technology created unrest and then came the recent technology.
Over the years manufacturers developed technology that did progressive scanning, this is what ‘P’ stands for. So ‘I’ was replaced with ‘p’. ‘I’ stood for interlacing– 1080i changed 1080p. So, now pictures aren’t visible in odd and even lines but at a go. The CRT TV used to display 576 horizon lines, but now it has changed to HD 720 or 1080 lines. These lines make up images. Higher the resolution better is the image quality. It is evident now that digital pictures are nearly four times better and crystal clear than the analog ones.
Now, 1080p offers the clearest pictures available. It has a resolution of 1920 x 1080 pixels. And the best thing about digital TV is that all the lines are displayed continuously and simultaneously. Now, lines are smoother and hence picture quality are amazing and it is nothing less than real life picture.