computer hardware, consumer electronics, electronic components  

Built-in TV tuner

Television tuning circuits convert received high frequency radio frequencies to an intermediate frequency (IF). With the increasing desire to integrate TV functions into personal computer (PC) systems and other electronic devices, various tuner receiving systems have been almost established for personal computers, in which an arbitrary signal sent from an external television system is received by a tuner, and video data and audio data can be output. Built-in TV tuners convert a radio frequency television signal into a baseband (or low frequency) video signal which can then be passed on to other elements in the PC for video processing applications. TV tuners may be fabricated on circuit boards and then installed in personal computer (PC) systems, thereby allowing the PC to function as a television set. Some TV tuner receiving systems operate in such a manner that video and audio signals from external sources are input by connecting a detachable capture card to the main part of a personal computer.

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