IGNOU BCA 4th sem Solved Assignment - Compare and contrast between analog and digital communication.

Compare and contrast between analog and digital communication.

Ans

·         Main differences between analog and digital communications

Digital communications use discontinuous valves to transmit communication whereas analog communications use continuous valves.Digital communications are much more discrete and are not so prone to interference so tend to carry the information with better quality. It will be received with higher quality sound, image and video quality so is much more suitable for television. Analog takes an image, video or sound and translates it into an electric pulse whereas digital turns the information into a code which is then digitally transmitted.

Until recently, most telephone, radio and television signals were sent viaanalog communication devices and is still used in circumstances where information is sent just a short distance due to the inexpensive nature of analog. In situations where analog was primarily the method of transmitting data, digital is now taking over. This is because analog is often open to interference and the communication is not always as clear as it should be. Many countries have now stopped using analog TV completely as the picture and sound quality is far superior on digital TV.

Until recently, most telephone, radio and television signals were sent viaanalog communication devices and is still used in circumstances where information is sent just a short distance due to the inexpensive nature of analog. In situations where analog was primarily the method of transmitting data, digital is now taking over. This is because analog is often open to interference and the communication is not always as clear as it should be. Many countries have now stopped using analog TV completely as the picture and sound quality is far superior on digital TV.

·         Analog Communications

Analog communication is a form of transmitting data such as voice, image or video using continuous signals. This is a relatively inexpensive way to transmit data. Analog communications are usually sent via twisted cables orfiber optic cables and they are transmitted via a carrier signal which is set at a specific frequency.

·         Digital Communications

Digital communication is now a much more common and desirable method of transmitting data. Digital information is put into a synchronized order to enable transmission. The information is then decoded when it reaches its final destination. There are not many opportunities for errors when using this method so information arrives intact and in the best quality possible.