Learn in the textbookSignal Methods and Video Interfaces
DefinitionDigital (デジタル) is a method that represents information as combinations of discrete values such as 0 and 1.
ExplanationInside a computer, all data is handled in this form. Even if noise distorts the waveform a little, the receiver can recover the original values by deciding again whether each one is 0 or 1, so quality holds up well through transmission and copying.
AnalogyA clock with a numeric display changes once a minute and never shows the values in between.
Memory hookIn English, digit means both "finger" and "numeral", which brings to mind discrete values counted one, two on your fingers.