Monday, February 06, 2006
Digital transmission systems are an entirely different audio and visual experience for viewers and listeners. Digital signals are transmitted to television and radio receivers with no audible or visual loss of quality. It is as if an exact duplicate is transmitted from the source to the receiver; however, this is not entirely how it is done. They do lose some quality because digital signaling still requires transmission by analog but, and this is a big but, digital systems do not record the analog signals ‚Äì digital encodes the signaling into bits with a bit being the size and speed of the sample being transmitted. The digital system transmits the bits by modulating carrier waves. Digital receivers are technologically designed to receive the signal, no matter what the quality is, and decode the encoding providing excellent crystal-clear imaging and CD quality audio. Realizing that this is a very complicated technology and detailed subject, it is good to know that digital is better simply because it eliminates noise completely, and although you will be seeing and listening to a copy, it will appear and sound the same as if you were listening and seeing the original.
Of course, the quality of what you view and listen to depends to a large extent on the type of entertainment system you use, but all negative effects of analog will be eliminated in digital transmissions. Satellite television service providers use digital and standard signaling transmissions exclusively with much improved quality in visual and audio technology and little to no interference in programming. So with changing times in research and development of technology come improvements and advancements that still depend somewhat on the older methods.