Multimedia involves using multiple media types like text, graphics, sound, and animation together. It is often used to refer to including audio, video, and animation on web pages. There are three main categories of multimedia applications: streaming stored audio and video, streaming live audio/video, and real-time interactive audio/video. Streaming stored media involves compressing and storing files on a web or streaming server. Users can pause, resume, and skip around files as they download. Streaming live media is similar to radio and TV broadcasts over the internet. Real-time interactive media allows people to communicate with audio and video in real-time, like internet telephony. Common compression techniques compress audio by encoding differences between samples and compress video