Serial digital interface is a foundational concept within broadcast engineering and digital media technology, referring to a family of technical standards for transmitting high-quality, uncompressed digital video and associated data. As an academic topic, it encompasses the study of these standards' technical specifications, physical layer implementations (such as 75-ohm coaxial cable and fiber optic), data structures, signal integrity, bandwidth requirements, and their evolution and application in professional video production and broadcast workflows, highlighting the methods for achieving reliable, low-latency digital signal transport.