Signals & Systems II: Frequency Response and Group Propagation Time

This lecture covers the concepts of frequency response, amplitude distortion, phase distortion, group propagation time, and linear phase filters. It explains the polar form of frequency response, differential formula for group delay, and the necessary conditions for achieving linear phase filters. The lecture also discusses the attenuation in decibels, radial frequency, and the additive nature of attenuations and group propagation times. Additionally, it explores the direct synthesis of digital filters, Chebyshev's criterion, and the synthesis process from an analog filter using the bilinear transformation.