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. Like most modern container formats, it allows streaming over the Internet. MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio and store other data such as subtitles and still images. 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. MPEG-1 is a standard for lossy compression of video and audio. International Organization for Standardization MPEG - Motion Picture Experts Group file interchange format (version 1)
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