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.


Early history

In the early days of its development, television used a combination of optical, mechanical, and electronic technologies to record, display, and broadcast visual images. However, in the late 1920s, television systems using only optical and electronic technology were developed, where all modern television systems employ this technology. Although mechanical systems were eventually discontinued, the knowledge gained from developing electromechanical systems was crucial in the development of full electronic television systems. The first images to be successfully transmitted electrically were via simple mechanical facsimile machines, (such as the pantelegraph) developed in the late 19th century. The concept of transmitting moving images using electrical power was first described in 1878 as the "telephonoscope" (a combined concept of telephone and motion picture), shortly after the invention of the telephone. At that time, science fiction writers had imagined that someday light would also be able to be delivered

INSERT INTO `wiki_article`(`id`, `article_id`, `title`, `article`, `img_url`) VALUES ('NULL()','Televisi','Television','At that time, science fiction writers had imagined that someday light would also be able to be delivered','')