The standard for digital media content description specifies digital media visual content descriptors to satisfy the requirement of searching in large-scale multimedia data and support applications to visual surveillance. Purpose The standard provides compact descriptors to represent the visual features and describe the category@ attribute@ property@ and context information of the multimedia data@ which can facilitate content searching and indexing@ save bandwidth for transmission@ enable hardware support for descriptor extraction and matching@ ensure interoperability of multimedia applications and ubiquitous platforms@ simplify design of visual application@ and enhance performance on visual surveillance applications@ which demand high bandwidth.