This lecture covers the comparison of memory cache organization types and signal filtering techniques using a moving average filter. The memory cache types discussed include independent blocks, numbered blocks, and grouped blocks. The lecture also explains how to recover a signal by filtering out unwanted components using a low-pass filter. The process involves multiplying the signal by a modulated carrier signal and applying a low-pass filter to extract the desired signal. The lecture concludes with a discussion on the differences between various signal processing techniques and their impact on signal recovery.