Linear video processing involves the manipulation and enhancement of video signals in electronic systems. This includes tasks such as amplification, filtering, equalization, and synchronization to ensure high-quality video output. Video processing circuits are designed to handle analog and digital video signals, performing operations to improve image quality, adjust color balance, and reduce noise or distortion. They are essential components in video capture devices, displays, broadcasting equipment, and multimedia systems, where accurate and reliable video processing is critical for optimal performance and user experience.