It also exploits temporal and spatial redundancy common in video to achieve better data compression than would be possible otherwise. It reduces or completely discards information in certain frequencies and areas of the picture that the human eye has limited ability to perceive fully. MPEG-1 Video exploits perceptual compression methods to reduce the data rate required by a video stream significantly. An AVI file takes the form of a single chunk in a RIFF formatted file, which is then subdivided into two mandatory 'chunks' and one optional 'chunk'. It is designed to compress VHS-quality raw digital video and CD audio down to 1.5 Mbit/s (26:1 and 6:1 compression ratios respectively) without excessive quality loss, making video CDs, digital cable/satellite TV, and digital audio broadcasting (DAB) possible.ĪVI is a derivative of the Resource Interchange File Format (RIFF), which divides a file's data into blocks, or 'chunks.' A FourCC tag identifies each 'chunk'. MPEG-1 is a standard for lossy compression of video and audio. AVI files can contain both audio and video data in a file container that allows synchronous audio-with-video playback.

Video/vnd.avi, video/avi, video/msvideo, video/x-msvideoĪudio Video Interleaved (also Audio Video Interleave), known by its initials AVI, is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows software.

MPEG - Motion Picture Experts Group file interchange format (version 1)

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