What is MPEG ?
MPEG is the famous four-letter word which stands for the “Moving Pictures Experts Groups. To the real word, MPEG is a generic means of compactly representing digital video and audio signals for consumer distribution. The basic idea is to transform a stream of discrete samples into a bitstream of tokens which takes less space, but is just as filling to the eye (or ear). This “transformation,” or better representing, exploits perceptual and even some actual statistical redundancies. The orthogonal dimensions of Video and Audio streams can be further linked with the Systems layer—MPEG’s own means of keeping the data types synchronized and multiplexed in a common serial bitstream. The essence of MPEG is its syntax: the little tokens that make up the bitstream. MPEG’s semantics then tell you (if you happen to be a decoder, that is) how to inverse represent the compact tokens back into something resembling the original stream of samples. These semantics are merely a collection of rules (wh
DVD video is compressed from studio CCIR-601 format to MPEG-2 format. This is a “lossy” compression which attempts to remove redundant information (such as sections of the picture that don’t change) and information that’s not readily perceptible by the human eye. The resulting video, especially when it is complex or changing quickly, may sometimes contain “artifacts” such as blockiness or fuzziness. It depends entirely on the quality of compression and how heavily the video is compressed. At average rates of 3.5 Mb/s (megabits/second), artifacts may be occasionally noticeable. Higher data rates result in higher quality, with almost no perceptible difference from the original master at rates above 6 Mb/s. As MPEG compression technology improves, better quality will be achieved at lower rates. MPEG-4 is the current state-of-the-art for video compression technology. The two older technologies MPEG-1 and MPEG-2 already caused a widespread distribution of digital video on the PC and noteboo
DVD video is compressed from studio CCIR-601 format to MPEG-2 format. This is a “lossy” compression which attempts to remove redundant information (such as sections of the picture that don’t change) and information that’s not readily perceptible by the human eye. The resulting video, especially when it is complex or changing quickly, may sometimes contain “artifacts” such as blockiness or fuzziness. It depends entirely on the quality of compression and how heavily the video is compressed. At average rates of 3.5 Mb/s (megabits/second), artifacts may be occasionally noticeable. Higher data rates result in higher quality, with almost no perceptible difference from the original master at rates above 6 Mb/s. As MPEG compression technology improves, better quality will be achieved at lower rates. MPEG-4 is the current state-of-the-art for video compression technology. The two older technologies MPEG-1 and MPEG-2 already caused a widespread distribution of digital video on the PC and noteboo
MPEG stands for Motion PicturesExperts Group. MPEG is a group of people that meet under ISO (the InternationalStandards Organization) to generate standards for digital video(sequences of images in time) and audio compression. In particular,they define a compressed bit stream, which implicitly defines adecompressor. However, the compression algorithms are up to theindividual manufacturers, and that is where proprietary advantage is obtained within the scope of a publicly available international standard. MPEG meets roughly four times a year for roughly a week each time. In between meetings, a great deal of work is done by the members, so it doesn’t all happen at the meetings. The work is organized and planned at the meetings.
MPEG (pronounced M-peg), which stands for Moving Picture Experts Group, is the name of a family of standards used for coding audio-visual information (e.g., movies, video, music) in a digital compressed format. The major advantage of MPEG compared to other video and audio coding formats is that MPEG files are much smaller for the same quality. This is because MPEG uses very sophisticated compression techniques.
