This lecture in a series of (Bilingual English/Arabic) lectures on "Introduction to course Digital Signal Processing Course".

This lecture is about obtaining the mathematical relationship between the input and the output of a discrete time system which is called convolution sum. Also, an example on obtaining the output using convolution through graphical method is given. This subject will continue in the next lecture with more on convolution.

محاضره في معالجة الاشارات الرقميه تناقش العلاقه التي تربط الاشاره الداحله مع الاضاره الخارجه في نظام المعالجه الرقمي الحسابيه والتي تسمى علاقه الكونفوليوشن