Why is digital video far better than the old analogue video technology?
With an analogue video signal, during transmission each frame is represented by a fluctuating voltage. With a digital video signal each frame is represented by a series of ones and zeros. The beauty of the latter method is that the signal knows what it is during transmission and what it should be at the end of transmission! Those ones and zeros will always be ones and zeros and so any errors that occur during transmission can easily be corrected at the end. Add to this the fact that, compared to voltage fluctuations, more ones and zeros can be transmitted, meaning that more information can be transferred! This results in vastly superior image and sound quality, with no degradation or errors as a result of transmission. Also, there is no loss in quality as a result of copying or repeated playback. Each copy is a perfect replica of the original and plays like the original, no matter how many times it is used!
