The basics of digital signal processing are developed in this course. These are time-based signals and systems, a mathematical description of signals and systems in the time, frequency and screen domain, including totals and integral transformations. The main emphasis here is on the discrete and fast Fourier transform for signal and system analysis. Another subject of education is the design of recursive and non-recursive digital filters and also of wave digital filters. For this purpose both the impulse invariance and the bilinear method, the Fourier approximation and the wave description to the design of digital filters are dealt with.