October 19, 2021
Television (TV) is a telecommunications medium created from the creation of John Mc. Graham from Saththam The use of the word "television" itself can also refer to "television boxes", "television shows", or "television transmissions". The invention of television is equated with the invention of the wheel, because this invention is able to change world civilization. In Indonesia 'television' is informally often referred to as TV (read: tvi, television or tipi.) Television boxes were first sold commercially since the 1920s, and since then television has become a common item in homes, business offices, and institutions, especially as a source of entertainment and news needs and as an advertising medium. Since the 1970s, the emergence of video cassettes, laser discs, DVDs and now Blu-ray discs, has also made television boxes a tool for viewing broadcast material and recordings. In recent years, television broadcasts have become accessible via the Internet, for example via iPlayer and Hulu. Although there are other forms of television such as closed-circuit television, the most commonly used type of television is broadcast television, which is based on a radio broadcasting system developed around the 1920s, using a high-power radio frequency transmitter to transmit television waves to a television receiver. TV broadcasting is usually propagated via VHF and UHF radio waves in the frequency band defined between 54-890 megahertz. Now TV waves have also emitted stereo sound or surround sound in many countries. Until 2000, TV broadcasts were broadcast in the form of analog waves, but recently, both public and private broadcasting companies are turning to digital broadcasting technology. A television box consists of various electronic circuits in it, including the receiver and broadcast receiver circuits. Visual display devices that do not have a signal receiving device are usually referred to as monitors, not televisions. A television system can be used in various technological uses such as analog (PAL, NTSC, SECAM), digital (DVB, ATSC, ISDB etc.) or high definition (HDTV). Television systems are now also used for event observation, industrial process control, and weapons guidance, especially in places that are usually too dangerous to observe directly. Amateur television (ham TV or ATV) is used for experimental activities and public entertainment run by amateur radio operators. Amateur TV stations have been used in urban areas before the advent of commercial TV stations. Television has played an important role in the socialization of the 20th and 21st centuries. In 2010, iPlayer was used in social media aspects in the form of internet television services, including Facebook and Twitter.