11. Heading: Advantages of digital signals and noise.
{"Image DocumentName": "11. Heading: Advantages of digital signals and noise.", "Image ImageDescription": "Signals in nature are analogue. For example, sound is an air pressure wave(a). It is analogue because it can be any value. Digital signals have many advantages(b): They can be converted to numbers and easily processed by computers (a). They are easy to store and to compress using mathematical algorithms. Noise does not affect them (b) as much as to analogue signals. When data is transmitted, processed or stored a certain amount of NOISE enters into the signal (a). With an analogue signal, noise cannot be distinguished from the original signal (b). We have distortion. In a digital signal, noise will not matter, as any signal close enough to a particular value will be interpreted as that value. slide.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}