| "Broadcasting is the transmission of radio and television programs that are intended for general public reception," reports the Britanica 15th Edition of 1986. Television involves the transmission of entertainment, information and education programs to a vast public audience in picture and sound.
Television uses electrical communication and transports an electrical image and a sequence of electrical impulses to produce a final image. The images are produced so quickly, (within less than 0.1 seconds), so it appears to be a moving continuous image from the perspective of the human eye. To remain fast and continuous, the image should refresh about every 0.035 seconds. It is approximated that about 300,000 details are sent through the airwaves to provide televisions with an accurate image.
Television systems are intended to add senses of vision and hearing beyond that of normal human capability. For example, a soccer game on the other side of the world transmitted live. Important variables in television systems include brightness, colour, detail, size and shape. The position of objects on the screen influence experiences, emotions and senses. |