Dive into a comprehensive 15-hour video lecture series on Signals and Systems, an introductory course in analog and digital signal processing. Explore key concepts applicable to various fields including seismic data processing, communications, speech processing, image processing, consumer electronics, and defense electronics. Learn from instructor Alan V. Oppenheim through 20 in-depth lectures, covering topics from sampling techniques to advanced signal processing methods. Gain practical insights through demonstrations and theoretical knowledge essential for understanding modern digital systems. Access this educational resource under the Creative Commons BY-NC-SA license, offering a solid foundation for students and professionals interested in digital signal processing and its wide-ranging applications.