Visual images are converted into electrical signals, and then turned into radio waves before transmited over the air. The radio waves are picked up by TV receiver and reconverted into electrical signals which are then displayed as images by the tv picture tube. The sound of the visual or images is processed in the similar way.
In broadcasting a video cameras in studio picked up the image which focussed on it's pick up tube. The surface of picked up tube is very sensitive to light. In latest camera video the picked up tube was replaced by device called CCD or Charge Couple Device. The image turned into electrical signal and then converted to radio waves which are then transmitted over the air.
The television aerial picks up the broadcast signal and feeds into tv set. In tv set the sound is processed and send as output to the loudspeaker. While the video information is used to drive cathode ray picture tube in tv set.
In broadcasting a video cameras in studio picked up the image which focussed on it's pick up tube. The surface of picked up tube is very sensitive to light. In latest camera video the picked up tube was replaced by device called CCD or Charge Couple Device. The image turned into electrical signal and then converted to radio waves which are then transmitted over the air.
The television aerial picks up the broadcast signal and feeds into tv set. In tv set the sound is processed and send as output to the loudspeaker. While the video information is used to drive cathode ray picture tube in tv set.
