The advent of satellite television saw the virtual explosion of television channels, broadcasters, production homes and content producers. This is because satellite TV and direct to home platforms have indeed pushed the frontiers of television broadcasting beyond all conceivable boundaries and onto a worldwide scale. It is not surprising that TV networks across the globe utilize the utilization of a Green screen.

One of the common systems that are utilized in TV program production is that of using a Green screen in the background of the studio where a particular program is being shot. This is a part of the technique of chroma key which deals particularly with the removal of certain pictures in the background of the shot and superimposing this with some other image, which is better for the production. For example, one can use a screen that is green in color behind a broadcaster who is reading out the weather stories. When viewers watch the program, the green or blue screen as the case may be, is replaced with a weather map or scenes of certain towns or satellite images being shown instead.

A Green screen is particularly useful for chroma key uses, on account of the fact the ordinary human skin tone has very little components of green in it. This helps in superior quality of image superimposition as well as the replacing of background, without interfering much with the general view of the broadcaster who is standing in the foreground. If there had been any green tint or tone in human skin, parts of the body would became invisible when using the other colored screen, making the effect quite peculiar and extremely unbecoming and incongruous.

One of the main advantages of using a Green screen is that it is reasonably simple to implement as well as being cost effective. If one were to use a huge plasma or HDTV screen behind the broadcaster, the effect may be wonderful, but the price would be far bigger than using a green screen. In nowadays of recession, where cost management is the key, the dice is loaded in favor of using less expensive options.

One can simply make a Green screen that may be used in TV program production. For this, something as easy as a table cloth can be employed. This cloth has to be regularly painted, so that there are no smudges or uneven areas that would stand out when the show goes on air. One can also employ a plain wall that's evenly painted in green to form the colored background. One of the guidelines to remember when using such a screen is that if the background image is one of trees or forests, green is a more suitable color to use than blue for the background, while if the image is of the sea or the sky, green wouldn't be so apt. Using a green screen is therefore a good means of making use of chroma key method in television program production, which is preferred due to its simplicity and inexpensiveness.