- published: 20 Apr 2016
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The term Audio-Visual (AV, or A/V) may refer to works with both a sound and a visual component, the production or use of such works, or the equipment used to create and present such works. Slide tape presentations,films and television program are examples of audio-visual presentations.
Once audio-visual media came into existence, it became a part of people's everyday lives within a few decades.
Business presentations are also usually audio-visual. In a typical presentation, the presenter provides the audio by speaking, and supplements it with a series of images projected onto a screen, either from a slide projector, or from a computer connected to a projector using a presentation program (software).
In the developed world, there has been a huge uptake of computer-based audio-visual equipment in the education sector, with many schools and higher educational establishments installing projection equipment and often using interactive whiteboard technology.
Audio is an electrical or other representation of sound.
Audio may also refer to:
Video is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of still images representing scenes in motion.
Video technology was first developed for cathode ray tube (CRT) television systems, but several new technologies for video display devices have since been invented. Charles Ginsburg led an Ampex research team developing the first practical video tape recorder (VTR). In 1951 the first video tape recorder captured live images from television cameras by converting the camera's electrical impulses and saving the information onto magnetic video tape.
Video recorders sold for $50,000 in 1956, and videotape cost $300 per one-hour reel. However, prices steadily dropped over the years; in 1971, Sony began selling videocassette recorder (VCR) tapes to the public. After the invention of the DVD in 1997 and Blu-ray Disc in 2006, sales of videotape and tape equipment plummeted.
Later advances in computer technology allowed computers to capture, store, edit and transmit video clips.