Audio-video processing is a field of technology focused on analyzing, manipulating, and enhancing audio and video signals using computational techniques and algorithms. It encompasses tasks such as noise reduction, speech and music recognition, object detection, video compression, and real-time streaming optimization. Applications range from entertainment (e.g., video editing, special effects) and communication (e.g., video conferencing, voice assistants) to surveillance (e.g., facial recognition, motion detection) and healthcare (e.g., medical imaging). By leveraging machine learning, signal processing, and computer vision, audio-video processing enables the extraction of meaningful information, improves media quality, and supports innovative solutions across industries, making it a cornerstone of modern multimedia systems.