What is analog broadcasting? What is digital broadcasting?

In analog broadcasting, the whole process from the sound source to the speaker, the nature of the signal is analog. Analog signals refer to information expressed by continuously changing physical quantities, whose amplitude, frequency or phase change continuously at any time, broadcast sound signals, television image signals, etc. Digital broadcasting refers to all kinds of encoding, modulation, transmission and other processing of digitized audio signals, video signals and various data signals in digital state. Digital signal refers to the discrete value of amplitude, and the amplitude representation is limited to a limited number of values. A binary code is a digital signal. Binary coding is less affected by noise and easy to be processed by digital circuits, so it has been widely used.

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