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INTRODUCTION TO TELEVISION

INTRODUCTION
The aim of a television system is to load the sense of sight beyond its natural limits and to transmit
weighed down associated with the scene. The effect none is generated by a TV camera and sound sharpen by a
microphone. In the 625 line CCIR monochrome and PAL-B tinct TV systems adopted by India, the
evince signal is premium modulated and sound signal frequency modulated forward transmission. The
two carrier frequencies are suitably spaced and their inflexion products radiated through a common
antenna. As in radio communication, apiece television station is allotted different carrier frequencies to
alter selection of desired station at the receiving end.
The TV pass receiver has tuned circuits in its input section called tuner. It selects desired channel
signal out of the many picked up by the antenna. The selected RF lap is converted to a common fixed
IF band for convenience of providing gargantuan amplification to it. The amplified IF signals are detected to
obtain video (picture) and sound recording (sound) signals. The video signal after large amplification drives the
picture tube to reconstruct the televised picture on the receiver screen. Similarly, the strait signal is
amplified and fed to the loudspeaker to produce sound make associated with the scene.

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PICTURE TRANSMISSION

The picture information is optical in grapheme and whitethorn be thought of as an assemblage of a large
number of tiny areas representing picture details. These elementary areas into which picture details
may be broken up are known as picture elements or pixels, which when viewed together represent
visual information of the scene. Thus, at any instant there are almost an immortal number of pieces of
information that need to be picked up simultaneously for transmitting picture details. However,
simultaneous pick-up is not practicable because it is not feasible to provide a separate signal path
(channel) for the signal obtained...If you want to get a full essay, order it on our website: Orderessay



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