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MPEG-4 is a patented collection of methods defining compression of audio and visual (AV) digital data. It was introduced in late 1998 and designated a standard for a group of audio and video coding formats and related technology agreed upon by the ISO/IEC Moving Picture Experts Group (MPEG) (ISO/IEC JTC1/SC29/WG11) under the formal standard ISO/IEC 14496 - Coding of audio-visual objects. Uses of MPEG-4 include compression of AV data for web (streaming media) and CD distribution, voice (telephone, videophone) and broadcast television applications.

MPEG-4 absorbs many of the features of MPEG-1 and MPEG-2 and other related standards, adding new features such as (extended) VRML support for 3D rendering, object-oriented composite files (including audio, video and VRML objects), support for externally-specified Digital Rights Management and various types of interactivity. AAC (Advanced Audio Coding) was standardized as an adjunct to MPEG-2 (as Part 7) before MPEG-4 was issued.

MPEG-4 is still a developing standard and is divided into a number of parts. Companies promoting MPEG-4 compatibility do not always clearly state which "part" level compatibility they are referring to. The key parts to be aware of are MPEG-4 part 2 (including Advanced Simple Profile, used by codecs such as DivX, Xvid, Nero Digital and 3ivx and by Quicktime 6) and MPEG-4 part 10 (MPEG-4 AVC/H.264 or Advanced Video Coding, used by the x264 encoder, by Nero Digital AVC, by Quicktime 7, and by high-definition video media like Blu-ray Disc).

Most of the features included in MPEG-4 are left to individual developers to decide whether to implement them. This means that there are probably no complete implementations of the entire MPEG-4 set of standards. To deal with this, the standard includes the concept of "profiles" and "levels", allowing a specific set of capabilities to be defined in a manner appropriate for a subset of applications.

Initially, MPEG-4 was aimed primarily at low bit-rate video communications; however, its scope as a multimedia coding standard was later expanded. MPEG-4 is efficient across a variety of bit-rates ranging from a few kilobits per second to tens of megabits per second. MPEG-4 provides the following functionalities:

Contents

Overview

MPEG-4 provides a series of technologies for developers, for various service-providers and for end users:

  • MPEG-4 enables different software and hardware developers to create multimedia objects possessing better abilities of adaptability and flexibility to improve the quality of such services and technologies as digital television, animation graphics, the World Wide Web and their extensions.
  • Data network providers can use MPEG-4 for data transparency. With the help of standard procedures, MPEG-4 data can be interpreted and transformed into other signal types compatible with any available network.
  • The MPEG-4 format provides end users with a wide range of interaction with various animated objects.
  • Standardized Digital Rights Management signaling, otherwise known in the MPEG community as Intellectual Property Management and Protection (IPMP).

The MPEG-4 format can perform various functions, among which might be the following:

  • Multiplexes and synchronizes data, associated with media objects, in such a way that they can be efficiently transported further via network channels.
  • Interaction with the audio-visual scene, which is formed on the side of the receiver.

Profiles and Levels

MPEG-4 provides a large and rich set of tools for encoding. Subsets of the MPEG-4 tool sets have been provided for use in specific applications. These subsets, called 'Profiles', limit the size of the tool set a decoder is required to implement.[1] In order to restrict computational complexity, one or more 'Levels' are set for each Profile.[1] A Profile and Level combination allows:[1]

  • A codec builder to implement only the subset of the standard he needs, while maintaining interworking with other MPEG-4 devices that implement the same combination.[1]
  • Checking whether MPEG-4 devices comply with the standard, referred to as conformance testing.[1]

MPEG-4 parts

MPEG-4 consists of several standards—termed "parts"—including the following: (Each part covers a certain aspect of the whole specification.)

MPEG-4 parts[2][3]
Part Number First public release date (First edition) Latest public release date (edition) Latest amend- ment Title Description
Part 1 ISO/IEC 14496-1 1999 2004[4] (2010[5]) 2007 (2010[6]) Systems Describes synchronization and multiplexing of video and audio. For example MPEG transport stream and the MPEG-4 file format version 1 (obsoleted by version 2 defined in MPEG-4 Part 14).
Part 2 ISO/IEC 14496-2 1999 2004[7] 2009 Visual A compression codec for visual data (video, still textures, synthetic images, etc.). One of the many "profiles" in Part 2 is the Advanced Simple Profile (ASP).
Part 3 ISO/IEC 14496-3 1999 2009[8] 2009[9] (2010[10]) Audio A set of compression codecs for perceptual coding of audio signals, including some variations of Advanced Audio Coding (AAC) as well as other audio/speech coding formats and tools (such as Audio Lossless Coding (ALS), Scalable Lossless Coding (SLS), Structured Audio, Text-To-Speech Interface (TTSI), HVXC, CELP and others)
Part 4 ISO/IEC 14496-4 2000 2004[11] 2009 (2010) Conformance testing Describes procedures for testing conformance to other parts of the standard.
Part 5 ISO/IEC 14496-5 2000 2001[12] 2009 (2010) Reference software Provides reference software for demonstrating and clarifying the other parts of the standard.
Part 6 ISO/IEC 14496-6 1999 2000[13] Delivery Multimedia Integration Framework (DMIF).
Part 7 ISO/IEC TR 14496-7 2002 2004[14] Optimized reference software for coding of audio-visual objects Provides examples of how to make improved implementations (e.g., in relation to Part 5).
Part 8 ISO/IEC 14496-8 2004 2004[15] Carriage of ISO/IEC 14496 contents over IP networks Specifies a method to carry MPEG-4 content on IP networks.
Part 9 ISO/IEC TR 14496-9 2004 2009[16] Reference hardware description Provides hardware designs for demonstrating how to implement the other parts of the standard.
Part 10 ISO/IEC 14496-10 2003 2009[17] (2010[18]) Advanced Video Coding (AVC) A codec for video signals which is technically identical to the ITU-T H.264 standard.
Part 11 ISO/IEC 14496-11 2005 2005[19] 2009 Scene description and application engine ("BIFS") Can be used for rich, interactive content with multiple profiles, including 2D and 3D versions. MPEG-4 Part 11 revised MPEG-4 Part 1 - ISO/IEC 14496-1:2001 and two amendments to MPEG-4 Part 1.
Part 12 ISO/IEC 14496-12 2004 2008[20] 2009[21] (2010[2]) ISO base media file format A file format for storing time-based media content. It is a general format forming the basis for a number of other more specific file formats (e.g. 3GP, Motion JPEG 2000, MPEG-4 Part 14). It is technically identical to ISO/IEC 15444-12 (JPEG 2000 image coding system - Part 12).
Part 13 ISO/IEC 14496-13 2004 2004[22] Intellectual Property Management and Protection (IPMP) Extensions. MPEG-4 Part 13 revised an amendment to MPEG-4 Part 1 - ISO/IEC 14496-1:2001/Amd 3:2004.
Part 14 ISO/IEC 14496-14 2003 2003[23] (2010[24]) MP4 file format It is also known as "MPEG-4 file format version 2". The designated container file format for MPEG-4 content, which is based on Part 12. It revises and completely replaces Clause 13 of ISO/IEC 14496-1 (MPEG-4 Part 1: Systems), in which the MPEG-4 file format was previously specified.
Part 15 ISO/IEC 14496-15 2004 2004[25] 2008 (2010[26]) Advanced Video Coding (AVC) file format For storage of Part 10 video. File format is based on Part 12, but also allows storage in other file formats.
Part 16 ISO/IEC 14496-16 2004 2009[27] (2010[28]) Animation Framework eXtension (AFX). It specifies MPEG-4 Animation Framework eXtension (AFX) model for representing 3D Graphics content. MPEG-4 is extended with higher-level synthetic objects for specifying geometry, texture, animation and dedicated compression algorithms.
Part 17 ISO/IEC 14496-17 2006 2006[29] Streaming text format Timed Text subtitle format
Part 18 ISO/IEC 14496-18 2004 2004[30] Font compression and streaming (for OpenType fonts).
Part 19 ISO/IEC 14496-19 2004 2004[31] Synthesized texture stream Synthesized texture streams are used for creation of very low bitrate synthetic video clips.
Part 20 ISO/IEC 14496-20 2006 2008[32] 2009 Lightweight Application Scene Representation (LASeR) and Simple Aggregation Format (SAF).
Part 21 ISO/IEC 14496-21 2006 2006[33] MPEG-J Graphics Framework eXtensions (GFX) (at "FCD" stage in July 2005, FDIS January 2006, published as ISO standard on 2006-11-22).
Part 22 ISO/IEC 14496-22 2007 2009[34] Open Font Format (OFFS) is based on the OpenType version 1.4 font format specification, and is technically equivalent to that specification.[35][36] (reached "CD" stage in July 2005, published as ISO standard in 2007)
Part 23 ISO/IEC 14496-23 2008 2008[37] Symbolic Music Representation (SMR) (reached "FCD" stage in October 2006, published as ISO standard in 2008-01-28)
Part 24 ISO/IEC TR 14496-24 2008 2008[38] Audio and systems interaction It describes the desired joint behavior of MPEG-4 File Format and MPEG-4 Audio.
Part 25 ISO/IEC 14496-25 2009 2009[39] 3D Graphics Compression Model Defines a model for connecting 3D Graphics Compression tools defined in MPEG-4 standards to graphics primitives defined in any other standard or specification.
Part 26 ISO/IEC 14496-26 (under development in 2009 [1]) Audio Conformance
Part 27 ISO/IEC 14496-27 2009[40] (2010[41]) 3D Graphics conformance

Profiles are also defined within the individual "parts", so an implementation of a part is ordinarily not an implementation of an entire part.

MPEG-1, MPEG-2, MPEG-7 and MPEG-21 are other suites of MPEG standards.

Licensing

MPEG-4 contains patented technologies that require licensing in countries that acknowledge software algorithm patents. Patents covering MPEG-4 are claimed by over two dozen companies. The MPEG Licensing Authority[42] licenses patents required for MPEG-4 Part 2 Visual from a wide range of companies (audio is licensed separately) and lists all of its licensors and licensees on the site. New licenses for MPEG-4 System patents are under development[43] and no new licenses are being offered while holders of its old MPEG-4 Systems license are still covered under the terms of that license for the patents listed (MPEG LA – Patent List).

AT&T is trying to sue companies such as Apple Inc. over alleged MPEG-4 patent infringement.[44] The terms of Apple's Quicktime 7 license for users[45] describes in paragraph 14 the terms under Apple's existing MPEG-4 System Patent Portfolio license from MPEGLA.

See also

References

  1. ^ a b c d e RFC 3640, p.31
  2. ^ a b MPEG. "MPEG standards - Full list of standards developed or under development". chiariglione.org. http://mpeg.chiariglione.org/standards.htm. Retrieved 2010-02-09. 
  3. ^ ISO/IEC JTC 1/SC 29 (2009-11-09). "Programme of Work - MPEG-4 (Coding of audio-visual objects)". http://www.itscj.ipsj.or.jp/sc29/29w42911.htm#MPEG-4. Retrieved 2009-11-10. 
  4. ^ ISO. "ISO/IEC 14496-1:2004 - Information technology -- Coding of audio-visual objects -- Part 1: Systems". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=38559. Retrieved 2009-10-30. 
  5. ^ ISO. "ISO/IEC NP 14496-1 - Information technology -- Coding of audio-visual objects -- Part 1: Systems". http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=55688. Retrieved 2009-12-29. 
  6. ^ ISO. "ISO/IEC 14496-1/FPDAmd 1 - Usage of LASeR in MPEG-4 systems and Registration Authority for MPEG-4 descriptors". http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=55689. Retrieved 2009-12-29. 
  7. ^ ISO. "ISO/IEC 14496-2:2004 - Information technology -- Coding of audio-visual objects -- Part 2: Visual". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=39259. Retrieved 2009-10-30. 
  8. ^ ISO. "ISO/IEC 14496-3:2009 - Information technology -- Coding of audio-visual objects -- Part 3: Audio". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=53943. Retrieved 2009-10-30. 
  9. ^ ISO (2009-09-11). "ISO/IEC 14496-3:2009/Amd 1:2009 - HD-AAC profile and MPEG Surround signaling". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=53944. Retrieved 2009-10-15. 
  10. ^ ISO (2009). "ISO/IEC 14496-3:2009/FPDAmd 2, ALS simple profile and transport of SAOC". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=54838. Retrieved 2009-10-13. 
  11. ^ ISO. "ISO/IEC 14496-4:2004 - Information technology -- Coding of audio-visual objects -- Part 4: Conformance testing". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=36084. Retrieved 2009-10-30. 
  12. ^ ISO. "ISO/IEC 14496-5:2001 - Information technology -- Coding of audio-visual objects -- Part 5: Reference software". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=36086. Retrieved 2009-10-30. 
  13. ^ ISO. "ISO/IEC 14496-6:2000 - Information technology -- Coding of audio-visual objects -- Part 6: Delivery Multimedia Integration Framework (DMIF)". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=34418. Retrieved 2009-10-30. 
  14. ^ ISO. "ISO/IEC TR 14496-7:2004 - Information technology -- Coding of audio-visual objects -- Part 7: Optimized reference software for coding of audio-visual objects". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=40728. Retrieved 2009-10-30. 
  15. ^ ISO. "ISO/IEC 14496-8:2004 - Information technology -- Coding of audio-visual objects -- Part 8: Carriage of ISO/IEC 14496 contents over IP networks". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=36066. Retrieved 2009-10-30. 
  16. ^ ISO. "ISO/IEC TR 14496-9:2009 - Information technology -- Coding of audio-visual objects -- Part 9: Reference hardware description". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=52073. Retrieved 2009-10-30. 
  17. ^ ISO. "ISO/IEC 14496-10:2009 - Information technology -- Coding of audio-visual objects -- Part 10: Advanced Video Coding". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=52974. Retrieved 2009-10-30. 
  18. ^ ISO. "ISO/IEC 14496-10:2009/FPDAmd 1 - Constrained baseline profile, stereo high profile and frame packing arrangement SEI message". http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=52975. Retrieved 2009-12-29. 
  19. ^ ISO. "ISO/IEC 14496-11:2005 - Information technology -- Coding of audio-visual objects -- Part 11: Scene description and application engine". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=38560. Retrieved 2009-10-30. 
  20. ^ ISO. "ISO/IEC 14496-12:2008 - Information technology -- Coding of audio-visual objects -- Part 12: ISO base media file format". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=51533. Retrieved 2009-10-30. 
  21. ^ ISO. "ISO/IEC 14496-12:2008/Amd 1:2009 - General improvements including hint tracks, metadata support and sample groups". http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=52356. Retrieved 2009-12-30. 
  22. ^ ISO. "ISO/IEC 14496-13:2004 - Information technology -- Coding of audio-visual objects -- Part 13: Intellectual Property Management and Protection (IPMP) extensions". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=39110. Retrieved 2009-10-30. 
  23. ^ ISO. "ISO/IEC 14496-14:2003 - Information technology -- Coding of audio-visual objects -- Part 14: MP4 file format". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=38538. Retrieved 2009-10-30. 
  24. ^ ISO. "ISO/IEC 14496-14:2003/FPDAmd 1 - Handling of MPEG-4 audio enhancement layers". http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=53749. Retrieved 2009-12-29. 
  25. ^ ISO. "ISO/IEC 14496-15:2004 - Information technology -- Coding of audio-visual objects -- Part 15: Advanced Video Coding (AVC) file format". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=38573. Retrieved 2009-10-30. 
  26. ^ ISO. "ISO/IEC 14496-15:2004/FDAmd 3 - File format support for Multiview Video Coding". http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=52885. Retrieved 2009-12-29. 
  27. ^ ISO. "ISO/IEC 14496-16:2009 - Information technology -- Coding of audio-visual objects -- Part 16: Animation Framework eXtension (AFX)". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=54596. Retrieved 2009-12-29. 
  28. ^ "ISO/IEC 14496-16:2009/FPDAmd 1 - Scalable complexity 3D mesh coding". http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=54603. Retrieved 2009-12-29. 
  29. ^ ISO. "ISO/IEC 14496-17:2006 - Information technology -- Coding of audio-visual objects -- Part 17: Streaming text format". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=39478. Retrieved 2009-10-30. 
  30. ^ ISO. "ISO/IEC 14496-18:2004 - Information technology -- Coding of audio-visual objects -- Part 18: Font compression and streaming". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=40151. Retrieved 2009-10-30. 
  31. ^ ISO. "ISO/IEC 14496-19:2004 - Information technology - Coding of audio-visual objects -- Part 19: Synthesized texture stream". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=40152. Retrieved 2009-10-30. 
  32. ^ ISO. "ISO/IEC 14496-20:2008 - Information technology -- Coding of audio-visual objects -- Part 20: Lightweight Application Scene Representation (LASeR) and Simple Aggregation Format (SAF)". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=52454. Retrieved 2009-10-30. 
  33. ^ ISO. "ISO/IEC 14496-21:2006 - Information technology -- Coding of audio-visual objects -- Part 21: MPEG-J Graphics Framework eXtensions (GFX)". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=41733. Retrieved 2009-10-30. 
  34. ^ ISO. "ISO/IEC 14496-22:2009 - Information technology -- Coding of audio-visual objects -- Part 22: Open Font Format". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=52136. Retrieved 2009-10-30. 
  35. ^ ISO/IEC JTC 1/SC 29/WG 11 (2008-07). "ISO/IEC 14496-22 "Open Font Format"". chiariglione.org. http://mpeg.chiariglione.org/technologies/mpeg-4/mp04-off/index.htm. Retrieved 2010-02-09. 
  36. ^ ISO (2007-03-15). "ISO/IEC 14496-22, First edition 2007-03-15, Information technology — Coding of audio-visual objects — Part 22: Open Font Format" (ZIP). http://standards.iso.org/ittf/PubliclyAvailableStandards/c043466_ISO_IEC_14496-22_2007(E).zip. Retrieved 2010-01-28. 
  37. ^ ISO. "ISO/IEC 14496-23:2008 - Information technology -- Coding of audio-visual objects -- Part 23: Symbolic Music Representation". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=45531. Retrieved 2009-10-30. 
  38. ^ ISO. "ISO/IEC TR 14496-24:2008 - Information technology -- Coding of audio-visual objects -- Part 24: Audio and systems interaction". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=46461. Retrieved 2009-10-30. 
  39. ^ ISO. "ISO/IEC 14496-25:2009 - Information technology -- Coding of audio-visual objects -- Part 25: 3D Graphics Compression Model". ISO. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=50552. Retrieved 2009-10-30. 
  40. ^ ISO. "ISO/IEC 14496-27:2009 - Information technology -- Coding of audio-visual objects -- Part 27: 3D Graphics conformance". http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=53751. Retrieved 2009-12-29. 
  41. ^ ISO. "ISO/IEC 14496-27:2009/FPDAmd 2 - Handling of MPEG-4 audio enhancement layers". http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=53752. Retrieved 2009-12-29. 
  42. ^ MPEG Licensing Authority – MPEG-4 Visual: Introduction
  43. ^ MPEG Licensing Authority – MPEG-4 Systems: Introduction
  44. ^ "AT&T Warns Apple, Others, Of Patent Infringement". PC Magazine. February 9, 2006. http://www.pcmag.com/article2/0,1895,1923218,00.asp. Retrieved 2007-08-10. 
  45. ^ Apple Quicktime 7 Software License (PDF)

External links

MPEG (Moving Picture Experts Group)
MPEG-1 • 2 • 3 • 4 • 7 • 21 • A • B • C • D • E • V • M • U
Multimedia compression formats
Video compression
MJPEG · Motion JPEG 2000 · MPEG-1 · MPEG-2 (Part 2) · MPEG-4 (Part 2/ASP · Part 10/AVC) · HVC
H.120 · H.261 · H.262 · H.263 · H.264 · H.265
Others
AMV · AVS · Bink · CineForm · Cinepak · Dirac · DV · Indeo · OMS Video · Pixlet · RealVideo · RTVideo · SheerVideo · Smacker · Sorenson Video · Theora · VC-1 · VP6 · VP7 · VP8 · WMV  · XVD
Audio compression
G.711 · G.718 · G.719 · G.722 · G.722.1 · G.722.2 · G.723 · G.723.1 · G.726 · G.728 · G.729 · G.729.1
Others
AC3 · AMR · AMR-WB · AMR-WB+ · Apple Lossless · ATRAC · DRA · FLAC · GSM-FR · GSM-EFR · iLBC · Monkey's Audio · μ-law · Musepack · Nellymoser · OptimFROG · Original Sound Quality  · RealAudio · RTAudio  · SD2  · SHN · SILK · Siren · Speex · TwinVQ · Vorbis · WavPack · WMA · True Audio
Image compression
JPEG · JPEG 2000 · JPEG XR · lossless JPEG · JBIG · JBIG2 · PNG · WBMP
Others
APNG · BMP · DjVu · EXR · GIF · ICER · ILBM · MNG · PCX · PGF · TGA · TIFF
Media containers
General
3GP · ASF · AVI · Bink · DMF · DPX · EVO · FLV · GXF · M2TS  · Matroska · MPEG-PS · MPEG-TS · MP4 · MXF  · Ogg · QuickTime · RealMedia · RIFF · Smacker · VOB
Audio only
AIFF · AU · WAV
See Compression methods for methods and Compression software implementations for codecs

Simple English

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 You can help Wikipedia by making this page or section simpler.

MPEG-4 is a video and audio standard. Movies in MPEG-4 need less space on a computer and at the same time they have DVD quality. MPEG means Moving Picture Experts Group. Hundreds of researchers and engineers all over the world worked to develop MPEG-4. The work on this standard ended in 1998 and in a few months MPEG-4 was made into a standard all over the world.

Movies that use MPEG-4 standard have high quality and have take up less computer room. Older standards were MPEG-1 and MPEG-2. In comparison with these older versions, MPEG-4 has additional features like having a way to fix problems, lots of quality and size choices, good picture and many more.

MPEG-4 takes into consideration special needs from computer, television areas and telecommunication. It is able to be, besides rectangular pieces of computer information, individual objects in a certain area. An example could be a car driving in front of a background. The background does not change. Since MPEG-4 can be many rectangular images, the car can be treated as another thing, not being a fixed background.

Other pages

Other websites

  • MPEG-4 - Additional information on the format for more advanced users

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