What Do You Know About Video Data?

Films that you see at the movies or on TV are merely moving graphical data. Typically, films are projected at a rate of 30 frames per second, each frame is still graphic. The amount of data involved in showing a two hour feature film can be quiet substantial. For instance, just a single 256 colour image shown on a 640-480 pixel display requires 307,200 bytes. When you multiply that figure by 30 times per second, 60 seconds per minute, and 120 minutes you get more than 66 gigabytes of information.

The human eye and ear cannot detect small alterations in images and sounds have led to a practice called digital watermarking. Digital watermarks protect digital creations, such as art and music, from theft or alteration. All kinds of movies, films, are all graphics data including movie clips you have in your cell phones, in your pockets cameras etc. all are graphics data and if its in motion than this kind of data is referred to as video data. As we all know data is the some sort of information, its forms are different. If its in a form of audio its audio data in form of graphics is graphics data and if it is in form of movie, clips than it is known as video data.