Analog television (or analogue television) encodes television and transports the picture and sound information as an analog signal, that is, by varying the amplitude and/or frequencies of the broadcast signal. Analog television, like all other motion picture systems, exploits the properties of the human eye to create the illusion of moving images. Analog television service is the traditional TV system. Analog television has been the standard broadcast technology since the inception of television using magnetic waves to transmit and display pictures and sound. Analog television has an aspect ratio of 4 by 3, which means the screen is 4 units wide by 3 units high. lg led tv 43 inch
HDTV, the highest quality format, provides high resolution, a widescreen format, and surround sound. HDTV is a name given to two of the digital television (DTV) formats. HDTV programs can include Dolby Digital surround sound, the same digital sound system used in many movie theaters and DVDs. HDTV uses the same amount of bandwidth (the size of the communications channel) as the current analog system, but with HDTV, about six times more information is transmitted. HDTV is the highest quality of DTV, but it is only one of many formats. HDTV pictures are created by scanning up to twice as many lines. HDTV sets have wider, movie-theater like screens that more closely resemble human peripheral vision, making it more natural to watch. HDTV sets are “backward compatible,” meaning existing analog equipment (VCRs, DVD players, camcorders, video games, etc. HDTV is best viewed on a new high-definition television. HDTV uses a wider 16 by 9 aspect ratio, which delivers movies with less “edge cropping” and provides a more intense viewing experience. HDTV’s digital audio sounds better than a standard television’s analog sound, just like digital CDs are superior to analog radio.
Cable Television Networks are already being broadcasted in simulcast since 2004 and analogue cable services were switched-off in April 2007. Cable and satellite subscribers with analog TVs should contact their service providers about obtaining converter boxes for the DTV transition. Cable here faces minor but growing competition from satellite and more recently, television via high-speed Internet connections with the service known as IPTV. Cable operators must ensure that all local broadcast stations carried pursuant to this Act are ‘viewable’ by all cable subscribers,” explained Martin, in a statement.