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During the 1990’s, the telecommunications and electronics industry witnessed the wholesale transition from analog to digital electronics technology, and as most of us have become aware, digital has become the new buzzword. Vinyl LP records have been replaced by compact discs, VHS videotape is being super-ceded by higher quality DVDs, and essentially all storage media now operates within the digital domain. Here the South Africa, DST threatens conventional analog broadcast television, DST is in fact digital high definition TV. The user-benefits of digital technology are apparent to everyone, even to the most non-technical among us.
Prior to the 1970’s virtually all electronics systems with the exception of digital computers employed analog technology. In an analog system, the output signal, whether it is audio, video, or some other signal format, is literally and ideally the analog of the input signal. Although this sounds simple to achieve, in practice this is extremely difficult to do accurately, and analog signals have always been highly susceptible to rapid signal degradation, electrical noise, and distortion, particularly when multiple generations or reproductions of the signal are required. Digital signals on the other hand, are essentially immune to the problems that plague analog, and theoretically, an infinite number of signal regenerations are possible with zero quality loss.
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