1.1 Introduction o Classification of signals Depending on the number of independent variable, the signal can be classified as a one-dimensional signal(speech a two-dimensional signal (image) a multidimensional signal(video)1.1 Introduction ◆ Depending on the number of independent variable, the signal can be classified as  one-dimensional signal (speech)  two-dimensional signal (image)  multidimensional signal (video) ⚫ Classification of signals