Lecture
This lecture covers the concept of filtering signals, where a signal passing through a filter results in a distorted version, often done to reduce noise. Specifically, it focuses on ideal low-pass filters that eliminate frequencies above a cutoff frequency. Through examples, the instructor demonstrates how filtering affects signals with different frequency components, showcasing the impact of ideal low-pass filtering on signals containing specific frequencies. The lecture concludes by highlighting the practical application of low-pass filters in signal processing.