Explore fundamental signal processing concepts in this comprehensive 90-minute lecture. Delve into complex number visualization, their relationship with real signals, and function shifting techniques. Examine time scaling and shifting of sinusoids, signal power and energy calculations, and the significance of decibels. Gain a clear understanding of the delta function, its summation, and transform notation. Investigate Linear Time Invariant (LTI) systems, the meaning of "linear phase," and develop a deeper comprehension of the delta impulse function. Equip yourself with essential knowledge for advanced signal processing applications and analysis.