Audio & Video
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Audio/Video assigns to apparatus and operations that deal with sound and sight. The Audio/Video world includes microphones, tape recorders, audio mixers and video cameras, film projectors, slide projectors, VCRs, CD and DVD players/recorders, amplifiers and speakers. The term originally meant audio/visual. Division that is listened of a radio or television program or commercial or of an audiovisual conference. It includes spoken version and dialogue, sound effects and music. A television script page is divided vertically into two halves: all information on the right side pertains to the audio portion of the script; information on the left pertains to the video portion.

Audio devices are analog, because they manage sound waves in an analogous shape. For example, radios support the audio signal as rippling waves from antenna to speaker. Tape cassette players record sound waves as magnetic waves. The phonograph record, sound waves were exactly dissever into the plastic platters. Digital devices are normally used in the computer, audio is processed by changing the analog signal into a digital code using Pulse-code modulation. See A/D converter, PCM and sampling.

The term video normally assigns to various storage formats for moving eye pictures: digital video formats, containing DVD, QuickTime, and MPEG-4 and analog videotapes, containing VHS and Betamax. Video can be recorded and communicated in different physical media such as the magnetic tape when recorded as NTSC electric signals by video cameras or in MPEG-4 or DV digital media when recorded by the digital cameras. Quality of video basically depends on the catching order and storage used. Digital television (DTV) is a perfectely current format with superior quality than previous television formats and has become a common for television video.

Cable television the transmission of televised picture to spectator by means of coaxial cables. Cable systems receive the television signal, which is sent out over cables to particular contributers, by a common antenna (CATV) or satellite dish. Cable television using a satellite dish or high master antenna to accept aloof television signals and then retailing the service to residents of a city or town. Cable contributers may accept national network television broadcasts, other specialized stations, and the chance to contributers to premium channels, such as HBO, at an additional cost.

Cable Television
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Cable television the transmission of televised picture to spectator by means of coaxial cables. Cable systems receive the television signal, which is sent out over cables to particular contributers, by a common antenna (CATV) or satellite dish. Cable television using a satellite dish or high master antenna to accept aloof television signals and then retailing the service to residents of a city or town. Cable contributers may accept national network television broadcasts, other specialized stations, and the chance to contributers to premium channels, such as HBO, at an additional cost.....



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