Why must sound& video input into a PC be converted from analog to digital?
Sound and video sources create infinitely variable signals in the physical world, known as analog signals. Computers, however, can only store data in digital form. To capture and store this information, a computer must convert the signal from an analog to a digital signal.AnalogAudio and video sources in the physical world create sound and light signals that are “analogous” to the source, meaning that they contain infinite variations in qualities such as amplitude, frequency, brightness and color. We sense these signals with our eyes and ears directly, and experience them as images and sounds.DigitalComputers can only store information as a series of ones and zeros, known as “digits.” Computers use these digits to represent the signals measured by the computer’s input devices, and the resulting data is known as “digital” information.Digital InputComputer create a digital representations of analog signals via an “analog to digital converter.” “Analog-to-digital converters” continuously
