How Has Tv Changed

Television & VCR/DVD’s have changed dramatically over the years

How has television changed over the last 60 years? This question can be answered in a variety of different ways ranging from the technological changes and advances it has gone through to the question of whether it has any type of effects on the way people perceive it, or if society is manipulated by what they see on television. This report will hopefully uncover and discover television how it was then until how it is now. Television broadcasting was first introduced in 1936 when it was available in London. Philo T. Farnsworth, Vladimir Zwarykin, Charles Jenkins and John Baird all were a part of the inventing of the television. Zworykin used a small piece of technology called
However, these channels were only received clearly in larger cities. It was very difficult for television signals to pass through the mountains and rural areas. In order to resolve the problem what is known as cable television was introduced in 1948. The purpose of cable television was to be able to bring existing broadcast signals to rural areas with community antennas placed at high elevations, usually on mountains or on top of tall poles. Since the invention of cable television, it has grown rapidly. USA Today and Nielson Media Research say that the average Americans home has 2.71 televisions and 2.55 people that live in the home. According to George Gerbner “TV is a world in which men outnumber women at least three to one”. (115) there are more televisions in the average home than there are people. In 1960’s people got more information from their televisions then they did from the newspapers, as in today’s world not many people even read the newspaper anymore because they all watch the news on the television or they search the internet. Plasma and LCD were in the experimental stages in the 90’s and standard CRT televisions still lead the market. How televisions now have additional features like picture in picture, sleep timers and parent
Video Cassette Recorder (VCR). The VCR was first developed in the 1950’s, but did not become a part of the average home entertainment system until the 1980’s, when the machines became much more affordable for the average household. The VCR uses ordinary video cassettes, measuring approximately four inches by seven inches, containing yards of video tape inside. This video tape is little more than a plastic strip covered with particles of iron oxide. This strip is recorded on by changing the television signals used to broadcast programs into magnetic fields, which magnetize the particles of iron oxide into patterns. The tape is played back by converting the magnetic patterns on the tape back into television signals. Many VCRs today use a form of recording and playback known as helical scan. In helical scan, one or two record/playback heads are mounted on the circumference of a drum that rotates rapidly in the same direction as the tape moves. Through this process the video tape is rolled off of one reel in the cassette, through the heads of the VCR where it is converted to picture form, and back onto the opposite reel of the video cassette. The Digital Video Disc (DVD) player was recently developed, and has undergone some major advancement through the use of rapidly advancing technology. Unlike the VCR, DVD uses a circular disc, similar in appearance to music CDs. On this disc, or DVD, original video