About MPEG Format
MPEG stands for Moving Pictures Experts Groups, part of the International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC), to set standards for audio and video compression and transmission. The term also refers to the family of digital video compression standards and file formats developed by the group. MPEG generally produces better-quality video than competing formats, such as Video for Windows, Indeo and QuickTime. MPEG files previously on PCs needed hardware decoders (codecs) for MPEG processing. Today, however, PCs can use software-only codecs including products from RealNetworks, QuickTime or Windows Media Player.
The MPEG format is the most popular means for streaming high quality video on the internet, mainly because it is a cross platform and non-commercial standard, and is supported by all popular web browsers. Another advantage of MPEG over other video formats is that since MPEG uses very sophisticated compression techniques, the quality of the video remains the same despite the files being much smaller.
MPEG algorithms compress data to form small bits that can be easily transmitted and then decompressed. MPEG achieves its high compression rate by storing only the changes from one frame to another, instead of each entire frame. The video information is then encoded using a technique called Discrete Cosine Transform (DCT). MPEG uses a type of lossy compression, since some data is removed. But the diminishment of data is generally imperceptible to the human eye.
MPEG Standards
MPEG-1 is a standard for lossy compression of video and audio. 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-2 is widely used as the format of digital television signals that are broadcast by terrestrial, cable, and direct broadcast satellite TV systems. It also specifies the format of movies and other programs that are distributed on DVD and similar discs. As such, TV stations, TV receivers, DVD players, and other equipment are often designed to this standard.
MPEG-3er udviklet til at gøre denne standard kompatibel med high-definition tv (HDTV), men det blev ikke nødvendigt, når MPEG-2 udvidelser udvidet denne standard evne til at omfatte HDTV.Dengang blev MPEG-3 opgivet.
MPEG-4 is borrowed from MPEG-1 and MPEG-2, the MPEG-4 standard extends functionality of audio/video compression by improving format flexibility. MPEG-4 supports 3-D rendered objects, as well as incorporating the copyright protection scheme known as Digital Rights Management (DRM). MPEG-4 can be used for broadcast television, online streaming media, applications such as videophone, and distribution on digital media.
MPEG-7 is formally called the Multimedia Content Description Interface, MPEG-7 provides a tool set for completely describing multimedia content. MPEG-7 is designed to be generic and not targeted to a specific application.
MPEG-21omfatter en Rights Expression Language (REL) og et Rights data Dictionary.I modsætning til andre MPEG standarder, der beskriver komprimering kodning metoder beskriver MPEG-21 en standard, der definerer beskrivelsen af indhold og også processer for adgang, søgning, opbevaring og beskyttelse af ophavsret indhold.
Relateret software
Leawo Video Converter (MPEG Converter): an easy video and audio solution for any format conversions, with fast speed and excellent output guaranteed. Equipped with 3D conversion function, you can get 3D MPEG video as output. This MPEG Converter not only converts common videos to video with MPEG encoder, but also converts MPEG video to other video formats.
Leawo DVD Ripper (DVD til MPEG Ripper): a useful DVD ripping program for users to rip DVD to video in various formats. So with it you can enjoy great convenience to convert DVD to MPEG for appreciation. This DVD to MPEG Ripper enables you to convert DVD to MPEG with fast speed and excellent video quality. 3D MPEG video as output is also supportable.
Relateret Source
MP4, M4V, AVI, WMV, MOV, MKV
Referencer
Sådan Konverter MPEG til AVI?
Sådan konverteres MPEG til MP4?
Konverter WMV til MPEG med Leawo Video Converter
Eksterne links
https://en.wikipedia.org/wiki/Mpeg
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