View source for MPEG-4

{{short description|Video encoding standard}}

'''MPEG-4''' is a group of [[international standard]]s for the [[Video compression|compression]] of digital audio and visual data, multimedia systems, and file storage formats. It was originally introduced in late 1998 as a group of [[audio coding format|audio]] and [[video coding format]]s and related technology agreed upon by the ISO/IEC [[Moving Picture Experts Group]] (MPEG) ([[ISO/IEC JTC 1]]/SC29/WG11) under the formal standard ISO/IEC 14496&nbsp;– ''Coding of audio-visual objects''. Uses of MPEG-4 include compression of audiovisual data for [[Internet video]] and [[CD]] distribution, voice ([[telephone]], [[videophone]]) and [[broadcast television]] applications. The MPEG-4 standard was developed by a group led by Touradj Ebrahimi (later the [[Joint Photographic Experts Group|JPEG]] president) and Fernando Pereira.<ref>{{cite book |last1=Ebrahimi |first1=Touradj |last2=Pereira |first2=Fernando |title=The MPEG-4 Book |date=2002 |publisher=[[Prentice Hall Professional]] |isbn=9780130616210 |url=https://books.google.com/books?id=ftRvA08WcM4C}}</ref>

==Background==
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. [[Advanced Audio Coding|AAC (Advanced Audio Coding)]] was standardized as an adjunct to MPEG-2 (as Part 1) before MPEG-4 was issued.

MPEG-4 is still an evolving 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]], [[RealMedia]], [[3ivx]], [[H.263]] and by [[QuickTime]] 6) and [[MPEG-4 part 10]] (MPEG-4 AVC/[[H.264]] or Advanced Video Coding, used by the [[x264]] encoder, Nero Digital AVC, QuickTime 7, [[Flash Video]], and [[high-definition video]] media like [[Blu-ray Disc]]).

Most of the features included in MPEG-4 are left to individual developers to decide whether or not to implement. 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 functions:
* Improved coding efficiency over MPEG-2<ref>{{cite journal |last1=Wiegand |first1=T |author-link1=Thomas Wiegand |last2=Sullican |first2=G J |last3=Bjontegaard |first3=G |last4=Luthra |first4=A |title=Overview of the H.264/AVC video coding standard |journal=IEEE Transactions on Circuits and Systems for Video Technology |date=2003 |volume=13 |issue=7 |pages=560–576 |doi=10.1109/TCSVT.2003.815165 }}</ref>
* Ability to encode mixed media data (video, audio, speech)
* Error resilience to enable robust transmission
* Ability to interact with the audio-visual scene generated at the receiver

==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 [[Synchronization|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===
{{See also|1=MPEG-4 Part 2#Profiles|label 1=Profiles and levels specified in MPEG-4 Part 2|2=Advanced Video Coding#Profiles|label 2=Profiles specified in MPEG-4 Part 10|3=Advanced Video Coding#Levels|label 3=Levels specified in MPEG-4 Part 10}}

MPEG-4 provides a large and rich set of tools for encoding.{{vague|date=August 2023}}
Subsets of the MPEG-4 tool sets have been provided for use in specific applications.{{vague|date=August 2023}}
These subsets, called 'Profiles', limit the size of the tool set a decoder is required to implement.<ref name="rfc3640-31"/> In order to restrict computational complexity, one or more 'Levels' are set for each Profile.<ref name="rfc3640-31"/> A Profile and Level combination allows:<ref name="rfc3640-31">{{citation | url = http://tools.ietf.org/html/rfc3640#page-31 | title = RFC 3640 | date = December 2003 | page = 31 | publisher = IETF | last1 = MacKie | first1 = David | last2 = Singer | first2 = David | last3 = Meer | first3 = Jan Van der | last4 = Swaminathan | first4 = Viswanathan | last5 = Gentric | first5 = Philippe | access-date = 2009-03-23 | archive-date = 2009-04-28 | archive-url = https://web.archive.org/web/20090428050828/http://tools.ietf.org/html/rfc3640#page-31 | url-status = live }}.</ref>
* A codec builder to implement only the subset of the standard needed, while maintaining interworking with other MPEG-4 devices that implement the same combination.<ref name="rfc3640-31"/>
* Checking whether MPEG-4 devices comply with the standard, referred to as [[conformance testing]].<ref name="rfc3640-31"/>

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

{| class="wikitable sortable" width="100%"
|+MPEG-4 parts<ref name="mpeg-standards">{{Cite web|url=http://mpeg.chiariglione.org/standards.htm |title=MPEG standards&nbsp;– Full list of standards developed or under development |author=MPEG |publisher=Chiariglione |access-date=2010-02-09 |url-status=dead |archive-url=https://web.archive.org/web/20100420192552/http://mpeg.chiariglione.org/standards.htm |archive-date=2010-04-20 }}</ref><ref name="jtc1-sc29">{{Cite web|url=http://kikaku.itscj.ipsj.or.jp/sc29/29w42911.htm#MPEG-4 |title=Programme of Work&nbsp;– MPEG-4 (Coding of audio-visual objects) |author=((ISO/IEC JTC 1/SC 29)) |date=2009-11-09 |access-date=2009-11-10 |url-status=dead |archive-url=https://web.archive.org/web/20131231054907/http://kikaku.itscj.ipsj.or.jp/sc29/29w42911.htm |archive-date=2013-12-31 }}</ref>
|-
! width="8%" | Part
! width="15%" | Number
! width="6%" | First public release date (first edition)
! width="6%" | Latest public release date (last edition)
! width="6%" | Latest amendment
! width="20%" | Title
! Description
|-
| Part 1 || ISO/IEC 14496-1<ref>[https://www.iso.org/standard/55688.html ISO/IEC 14496-1]</ref>
| 1999
| 2010<ref>{{Cite web |url= https://www.iso.org/standard/55688.html |title= ISO/IEC 14496-1:2010&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 1: Systems |access-date= 2017-08-30 |archive-date= 2017-08-30 |archive-url= https://web.archive.org/web/20170830235838/https://www.iso.org/standard/55688.html |url-status= live }}</ref>
| 2014<ref>{{Cite web |url=https://www.iso.org/standard/62114.html |title=ISO/IEC 14496-1:2010/Amd 2:2014&nbsp;– Support for raw audio-visual data |author=ISO |access-date=2017-08-30 |archive-date=2017-08-30 |archive-url=https://web.archive.org/web/20170830235134/https://www.iso.org/standard/62114.html |url-status=live }}</ref>
| Systems
| Describes synchronization and multiplexing of video and audio. For example, the [[MPEG-4 Part 14|MPEG-4 file format]] version 1 (obsoleted by version 2 defined in MPEG-4 Part 14). The functionality of a transport protocol stack for transmitting and/or storing content complying with ISO/IEC 14496 is not within the scope of 14496-1 and only the interface to this layer is considered (DMIF). Information about transport of MPEG-4 content is defined e.g. in [[MPEG transport stream|MPEG-2 Transport Stream]], [[RTP Audio Video Profiles]] and others.<ref>{{citation|url=http://webstore.iec.ch/preview/info_isoiec14496-1%7Bed3.0%7Den.pdf |archive-url=https://web.archive.org/web/20170831041606/https://webstore.iec.ch/preview/info_isoiec14496-1%7Bed3.0%7Den.pdf |url-status=dead |archive-date=2017-08-31 |title=ISO/IEC 14496-1:2004&nbsp;– Third edition 2004-11-15&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 1: Systems |author=ISO/IEC |date=2004-11-15 |access-date=2010-04-11 }}</ref><ref>{{Cite web |url=http://mpeg.chiariglione.org/standards/mpeg-4/mpeg-4.htm |title=Overview of the MPEG-4 Standard |author=((WG11 (MPEG))) |editor=Koenen, Rob |date=March 2002 |access-date=2010-04-11 |archive-date=2010-03-27 |archive-url=https://web.archive.org/web/20100327042022/http://mpeg.chiariglione.org/standards/mpeg-4/mpeg-4.htm |url-status=live }}</ref><ref>{{citation |url= http://www.ece.cmu.edu/~ece796/documents/MPEG4_Systems_CD_w1901.doc |format= MS Word .doc |title= Text for CD 14496-1 Systems |author=((WG11)) |date=1997-11-21 |access-date= 2010-04-11}}</ref><ref>{{Cite web | url= http://mpeg.chiariglione.org/faq/mp4-sys/sys-faq-esm.htm | title= MPEG-4 Systems Elementary Stream Management (ESM) | date= July 2001 | access-date= 2010-04-11 | archive-date= 2010-04-01 | archive-url= https://web.archive.org/web/20100401091408/http://mpeg.chiariglione.org/faq/mp4-sys/sys-faq-esm.htm | url-status= live }}</ref><ref>{{Cite web |url=http://mpeg.chiariglione.org/faq/mp4-sys/mp4-sys.htm |title=MPEG Systems (1-2-4-7) FAQ, Version 17.0 |date=July 2001 |access-date=2010-04-11 |archive-date=2020-10-27 |archive-url=https://web.archive.org/web/20201027160601/http://mpeg.chiariglione.org/faq/mp4-sys/mp4-sys.htm |url-status=live }}</ref>
|-
| [[MPEG-4 Part 2|Part 2]] || ISO/IEC 14496-2<ref>[https://www.iso.org/standard/39259.html ISO/IEC 14496-2] {{Webarchive|url=https://web.archive.org/web/20170830235141/https://www.iso.org/standard/39259.html |date=2017-08-30 }}</ref>
| 1999
| 2004<ref>{{Cite web | url=https://www.iso.org/standard/39259.html | title=ISO/IEC 14496-2:2004&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 2: Visual | publisher=ISO | access-date=2017-08-30 | archive-date=2017-08-30 | archive-url=https://web.archive.org/web/20170830235141/https://www.iso.org/standard/39259.html | url-status=live }}</ref>
| 2009
| [[MPEG-4 Part 2|Visual]]
| A compression format for visual data (video, still textures, synthetic images, etc.). Contains many profiles, including the [[Advanced Simple Profile]] (ASP), and the [[MPEG-4 Part 2#Simple Profile (SP)|Simple Profile]] (SP).
|-
| [[MPEG-4 Part 3|Part 3]]
| ISO/IEC 14496-3<ref>[https://www.iso.org/standard/53943.html ISO/IEC 14496-3] {{Webarchive|url=https://web.archive.org/web/20170830234701/https://www.iso.org/standard/53943.html |date=2017-08-30 }}</ref>
| 1999
| 2009<ref>{{Cite web | url=https://www.iso.org/standard/53943.html | title=ISO/IEC 14496-3:2009&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 3: Audio | publisher=ISO | access-date=2017-08-30 | archive-date=2017-08-30 | archive-url=https://web.archive.org/web/20170830234701/https://www.iso.org/standard/53943.html | url-status=live }}</ref>
| 2017<ref>{{Cite web | url=https://www.iso.org/standard/70436.html | title=ISO/IEC 14496-3:2009/Amd 6:2017, Profiles, levels and downmixing method for 22.2 channel programs | publisher=ISO | year=2017 | access-date=2017-08-30 | archive-date=2017-08-30 | archive-url=https://web.archive.org/web/20170830234725/https://www.iso.org/standard/70436.html | url-status=live }}</ref>
| [[MPEG-4 Part 3|Audio]]
| A set of compression formats 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), [[MPEG-4 Structured Audio|Structured Audio]], [[Text-To-Speech]] Interface (TTSI), [[HVXC]], [[CELP]] and others)
|-
| Part 4
| ISO/IEC 14496-4<ref>[https://www.iso.org/standard/36084.html ISO/IEC 14496-4] {{Webarchive|url=https://web.archive.org/web/20170830235126/https://www.iso.org/standard/36084.html |date=2017-08-30 }}</ref>
| 2000
| 2004<ref>{{Cite web | url=https://www.iso.org/standard/36084.html | title=ISO/IEC 14496-4:2004&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 4: Conformance testing | publisher=ISO | access-date=2017-08-30 | archive-date=2017-08-30 | archive-url=https://web.archive.org/web/20170830235126/https://www.iso.org/standard/36084.html | url-status=live }}</ref>
| 2016
| Conformance testing
| Describes procedures for testing conformance to other parts of the standard.
|-
| Part 5
| ISO/IEC 14496-5<ref>[https://www.iso.org/standard/36086.html ISO/IEC 14496-5] {{Webarchive|url=https://web.archive.org/web/20170830235446/https://www.iso.org/standard/36086.html |date=2017-08-30 }}</ref>
| 2000
| 2001<ref>{{Cite web | url=https://www.iso.org/standard/36086.html | title=ISO/IEC 14496-5:2001&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 5: Reference software | publisher=ISO | access-date=2017-08-30 | archive-date=2017-08-30 | archive-url=https://web.archive.org/web/20170830235446/https://www.iso.org/standard/36086.html | url-status=live }}</ref>
| 2017
| Reference software
| Provides [[reference implementation (computing)|reference software]] for demonstrating and clarifying the other parts of the standard.
|-
| [[Delivery Multimedia Integration Framework|Part 6]]
| ISO/IEC 14496-6<ref>[https://www.iso.org/standard/34418.html ISO/IEC 14496-6] {{Webarchive|url=https://web.archive.org/web/20170831000234/https://www.iso.org/standard/34418.html |date=2017-08-31 }}</ref>
| 1999
| 2000<ref>{{Cite web  | url=https://www.iso.org/standard/34418.html  | title=ISO/IEC 14496-6:2000&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 6: Delivery Multimedia Integration Framework (DMIF)  | publisher=ISO  | access-date=2017-08-30  | archive-date=2017-08-31  | archive-url=https://web.archive.org/web/20170831000234/https://www.iso.org/standard/34418.html  | url-status=live  }}</ref>
| 
| [[Delivery Multimedia Integration Framework]] (DMIF)
|
|-
| Part 7
| ISO/IEC TR 14496-7<ref>[https://www.iso.org/standard/40728.html ISO/IEC TR 14496-7] {{Webarchive|url=https://web.archive.org/web/20170831000423/https://www.iso.org/standard/40728.html |date=2017-08-31 }}</ref>
| 2002
| 2004<ref>{{Cite web | url=https://www.iso.org/standard/40728.html | title=ISO/IEC TR 14496-7:2004&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 7: Optimized reference software for coding of audio-visual objects | publisher=ISO | access-date=2017-08-30 | archive-date=2017-08-31 | archive-url=https://web.archive.org/web/20170831000423/https://www.iso.org/standard/40728.html | url-status=live }}</ref>
| 
| 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<ref>[https://www.iso.org/standard/36066.html ISO/IEC 14496-8] {{Webarchive|url=https://web.archive.org/web/20170830234045/https://www.iso.org/standard/36066.html |date=2017-08-30 }}</ref>
| 2004
| 2004<ref>{{Cite web | url=https://www.iso.org/standard/36066.html | title=ISO/IEC 14496-8:2004&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 8: Carriage of ISO/IEC 14496 contents over IP networks | publisher=ISO | access-date=2017-08-30 | archive-date=2017-08-30 | archive-url=https://web.archive.org/web/20170830234045/https://www.iso.org/standard/36066.html | url-status=live }}</ref>
| 
| Carriage of ISO/IEC 14496 contents over IP networks
| Specifies a method to carry MPEG-4 content on [[IP network]]s. It also includes guidelines to design [[Real-time Transport Protocol|RTP]] payload formats, usage rules of [[Session Description Protocol|SDP]] to transport ISO/IEC 14496-1-related information, [[MIME]] type definitions, analysis on RTP security and [[multicast]]ing.
|-
| Part 9
| ISO/IEC TR 14496-9<ref>[https://www.iso.org/standard/52073.html ISO/IEC TR 14496-9] {{Webarchive|url=https://web.archive.org/web/20170830235300/https://www.iso.org/standard/52073.html |date=2017-08-30 }}</ref>
| 2004
| 2009<ref>{{Cite web | url = https://www.iso.org/standard/52073.html | title = ISO/IEC TR 14496-9:2009&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 9: Reference hardware description | publisher = ISO | access-date = 2017-08-30 | archive-date = 2017-08-30 | archive-url = https://web.archive.org/web/20170830235300/https://www.iso.org/standard/52073.html | url-status = live }}</ref>
| 
| Reference hardware description
| Provides hardware designs for demonstrating how to implement the other parts of the standard.
|-
| [[Advanced Video Coding|Part 10]]
| ISO/IEC 14496-10<ref>[https://www.iso.org/standard/66069.html ISO/IEC 14496-10] {{Webarchive|url=https://web.archive.org/web/20170830234546/https://www.iso.org/standard/66069.html |date=2017-08-30 }}</ref>
| 2003
| 2014<ref>{{Cite web| url=https://www.iso.org/standard/66069.html | title=ISO/IEC 14496-10:2014&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 10: Advanced Video Coding | publisher=ISO | access-date=2017-08-30}}</ref>
| 2016<ref>{{Cite web |url= https://www.iso.org/standard/69728.html |title= ISO/IEC 14496-10:2014/Amd 3:2016&nbsp;– Constrained Additional supplemental enhancement information |publisher= ISO |access-date= 2017-08-30 |archive-date= 2017-08-30 |archive-url= https://web.archive.org/web/20170830234716/https://www.iso.org/standard/69728.html |url-status= live }}</ref>
| [[Advanced Video Coding]] (AVC)
| A compression format for video signals which is technically identical to the [[ITU-T]] [[H.264]] standard.
|-
| [[MPEG-4 Part 11|Part 11]]
| ISO/IEC 14496-11<ref>[https://www.iso.org/standard/63548.html ISO/IEC 14496-11] {{Webarchive|url=https://web.archive.org/web/20170830235720/https://www.iso.org/standard/63548.html |date=2017-08-30 }}</ref>
| 2005
| 2015<ref name = "mpeg4-part11">{{Cite web | url=https://www.iso.org/standard/63548.html | title=ISO/IEC 14496-11:2015&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 11: Scene description and application engine | publisher=ISO | access-date=2017-08-30 | archive-date=2017-08-30 | archive-url=https://web.archive.org/web/20170830235720/https://www.iso.org/standard/63548.html | url-status=live }}</ref>
| 
| [[MPEG-4 Part 11|Scene description and application engine]]
| Can be used for rich, interactive content with multiple profiles, including 2D and 3D versions. MPEG-4 Part 11 revised MPEG-4 Part 1&nbsp;– ISO/IEC 14496-1:2001 and two amendments to MPEG-4 Part 1. It describes a system level description of an application engine (delivery, lifecycle, format and behaviour of downloadable [[Java (programming language)|Java]] byte code applications) and the Binary Format for Scene (BIFS) and the [[Extensible MPEG-4 Textual Format|Extensible MPEG-4 Textual (XMT) format]]&nbsp;– a textual representation of the MPEG-4 multimedia content using [[XML]], etc.<ref name="mpeg4-part11" /> (It is also known as BIFS, XMT, MPEG-J.<ref name="MPEG-J White Paper">{{Cite web |url=http://mpeg.chiariglione.org/technologies/mpeg-4/mp04-j/ |title=MPEG-J White Paper |date=July 2005 |access-date=2010-04-11 |archive-date=2011-11-23 |archive-url=https://web.archive.org/web/20111123040838/http://mpeg.chiariglione.org/technologies/mpeg-4/mp04-j/ |url-status=live }}</ref> MPEG-J was defined in MPEG-4 Part 21)
|-
| [[MPEG-4 Part 12|Part 12]]
| ISO/IEC 14496-12<ref>[https://www.iso.org/standard/68960.html ISO/IEC 14496-12] {{Webarchive|url=https://web.archive.org/web/20230127141004/https://www.iso.org/standard/68960.html |date=2023-01-27 }}</ref>
| 2004
| 2015<ref>{{Cite web | url=https://www.iso.org/standard/68960.html | title=ISO/IEC 14496-12:2015&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 12: ISO base media file format | publisher=ISO | access-date=2014-01-19 | archive-date=2023-01-27 | archive-url=https://web.archive.org/web/20230127141004/https://www.iso.org/standard/68960.html | url-status=live }}</ref>
| 2017<ref>{{Cite web |url= https://www.iso.org/standard/70430.html |title= ISO/IEC 14496-12:2015/Amd 1:2017&nbsp;– DRC Extensions |author= ISO |access-date= 2017-08-30 |archive-date= 2017-08-31 |archive-url= https://web.archive.org/web/20170831000415/https://www.iso.org/standard/70430.html |url-status= live }}</ref>
| [[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]], [[JPEG 2000#Motion JPEG 2000|Motion JPEG 2000]], [[MPEG-4 Part 14]]). It is technically identical to ISO/IEC 15444-12 ([[JPEG 2000]] image coding system&nbsp;– Part 12).
|-
| Part 13
| ISO/IEC 14496-13<ref>[https://www.iso.org/standard/39110.html ISO/IEC 14496-13] {{Webarchive|url=https://web.archive.org/web/20170830234553/https://www.iso.org/standard/39110.html |date=2017-08-30 }}</ref>
| 2004
| 2004<ref>{{Cite web| url= https://www.iso.org/standard/39110.html | title=ISO/IEC 14496-13:2004&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 13: Intellectual Property Management and Protection (IPMP) extensions | publisher=ISO | access-date=2017-08-30}}</ref>
| 
| Intellectual Property Management and Protection (IPMP) Extensions
| MPEG-4 Part 13 revised an amendment to MPEG-4 Part 1&nbsp;– ISO/IEC 14496-1:2001/Amd 3:2004. It specifies common [[Intellectual Property]] Management and Protection (IPMP) processing, syntax and semantics for the carriage of IPMP tools in the bit stream, IPMP information carriage, mutual authentication for IPMP tools, a list of registration authorities required for the support of the amended specifications (e.g. [[Confédération Internationale des Sociétés d´Auteurs et Compositeurs|CISAC]]), etc. It was defined due to the lack of interoperability of different protection mechanisms (different DRM systems) for protecting and distributing copyrighted digital content such as music or video.<ref>{{citation|url=http://kikaku.itscj.ipsj.or.jp/sc29/open/29view/29n4689t.doc |format=MS Word .doc |title=FPDAM ISO/IEC 14496-1:2001 / AMD3 (Final Proposed Draft Amendment) |author=MPEG |date=March 2002 |access-date=2010-08-01 |url-status=dead |archive-url=https://web.archive.org/web/20140512231630/http://kikaku.itscj.ipsj.or.jp/sc29/open/29view/29n4689t.doc |archive-date=2014-05-12 }}</ref><ref>{{Cite web |url=http://mpeg.chiariglione.org/technologies/mpeg-4/mp04-ipx/ |title=MPEG-4 IPMPX white paper |date=July 2005 |publisher=MPEG |access-date=2010-08-01 |archive-date=2011-11-23 |archive-url=https://web.archive.org/web/20111123040258/http://mpeg.chiariglione.org/technologies/mpeg-4/mp04-ipx/ |url-status=live }}</ref><ref>{{Cite web |url=http://mpeg.chiariglione.org/technologies/general/mp-drm/ |title=MPEG Intellectual Property Management and Protection |date=April 2009 |publisher=MPEG |access-date=2010-08-01 |archive-date=2011-11-23 |archive-url=https://web.archive.org/web/20111123041715/http://mpeg.chiariglione.org/technologies/general/mp-drm/ |url-status=live }}</ref><ref>{{citation |url=http://www.cs.missouri.edu/~zengw/MPEG-4_IPMP_final_manuscript.pdf |title=MPEG-4 IPMP Extension&nbsp;– For Interoperable Protection of Multimedia Content |year=2004 |access-date=2010-08-01 |url-status=dead |archive-url=https://web.archive.org/web/20100618175344/http://www.cs.missouri.edu/~zengw/MPEG-4_IPMP_final_manuscript.pdf |archive-date=2010-06-18 }}</ref><ref>{{Cite web|url=http://www.mpegra.org/aspx/Login.aspx?Type=IPMP |title=MPEG Registration Authority&nbsp;– IPMP |publisher=MPEG RA International Agency ([[Confédération Internationale des Sociétés d´Auteurs et Compositeurs|CISAC]]) |access-date=2010-08-01 |url-status=dead |archive-url=https://web.archive.org/web/20070616033830/http://www.mpegra.org/aspx/Login.aspx?Type=IPMP |archive-date=2007-06-16 }}</ref><ref>{{Cite web|url=http://www.mpegra.org/aspx/FAQ.aspx |title=MPEG RA&nbsp;– FAQ IPMP |publisher=MPEG RA International Agency ([[Confédération Internationale des Sociétés d´Auteurs et Compositeurs|CISAC]]) |access-date=2010-08-01 }}{{dead link|date=May 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref>{{Cite web|url= http://www.ipmp-ra.org/ipmp/ipmpweb.nsf/home1 | title = Intellectual Property Management and Protection Registration Authority | publisher = [[Confédération Internationale des Sociétés d´Auteurs et Compositeurs|CISAC]] | date =2004-12-05 |access-date=2010-08-01 |archive-url=https://web.archive.org/web/20041205233806/http://www.ipmp-ra.org/ipmp/ipmpweb.nsf/home1 |archive-date=2004-12-05}}</ref><ref>{{citation|url=http://leonardo.chiariglione.org/publications/nab03/nab2003_2.htm |title=Digital media: Can content, business and users coexist? |first=Leonardo |last=Chiariglione |publisher=Telecom Italia Lab |place=Torino, IT |year=2003 |access-date=2010-08-01 |url-status=dead |archive-url=https://web.archive.org/web/20110725163553/http://leonardo.chiariglione.org/publications/nab03/nab2003_2.htm |archive-date=2011-07-25 }}</ref><ref>{{citation |url= http://www.w3.org/2000/12/drm-ws/pp/mpeg-koenen.ppt |format= PPT |title= IPMP in MPEG&nbsp;– W3C DRM workshop 22/23 January 2001 |access-date= 2010-08-01 |archive-date= 2012-07-16 |archive-url= https://web.archive.org/web/20120716224215/http://www.w3.org/2000/12/drm-ws/pp/mpeg-koenen.ppt |url-status= live }}</ref>
|-
| [[MPEG-4 Part 14|Part 14]]
| ISO/IEC 14496-14<ref>[https://www.iso.org/standard/79110.html ISO/IEC 14496-14] {{Webarchive|url=https://web.archive.org/web/20230330172852/https://www.iso.org/standard/79110.html |date=2023-03-30 }}</ref>
| 2003
| 2003<ref>{{Cite web | url=https://www.iso.org/standard/38538.html | title=ISO/IEC 14496-14:2003&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 14: MP4 file format | author=ISO | access-date=2017-08-30 | archive-date=2017-08-31 | archive-url=https://web.archive.org/web/20170831000353/https://www.iso.org/standard/38538.html | url-status=live }}</ref>
| 2010<ref>{{Cite web |url=https://www.iso.org/standard/53749.html |title=ISO/IEC 14496-14:2003/Amd 1:2010&nbsp;– Handling of MPEG-4 audio enhancement layers |publisher=ISO |access-date=2017-08-30 |archive-date=2017-08-30 |archive-url=https://web.archive.org/web/20170830235829/https://www.iso.org/standard/53749.html |url-status=live }}</ref>
| [[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<ref>[https://www.iso.org/standard/83336.html ISO/IEC 14496-15] {{Webarchive|url=https://web.archive.org/web/20231207182412/https://www.iso.org/standard/83336.html |date=2023-12-07 }}</ref>
| 2004
| 2022<ref>{{Cite web | url= https://www.iso.org/standard/83336.html | title= ISO/IEC 14496-15:2022&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 15: Carriage of network abstraction layer (NAL) unit structured video in the ISO base media file format | publisher= ISO | access-date= 2023-12-07 | archive-date= 2023-12-07 | archive-url= https://web.archive.org/web/20231207182412/https://www.iso.org/standard/83336.html | url-status= live }}</ref>
| 2023<ref>{{Cite web |url=https://www.iso.org/standard/83337.html |title=ISO/IEC 14496-15:2022/Amd 1:2023 - Information technology — Coding of audio-visual objects — Part 15: Carriage of network abstraction layer (NAL) unit structured video in the ISO base media file format — Amendment 1: Support for LCEVC |access-date=2023-12-07 |publisher=ISO |language=en |archive-date=2023-12-07 |archive-url=https://web.archive.org/web/20231207182411/https://www.iso.org/standard/83337.html |url-status=live }}</ref>
| Part 15: Carriage of network abstraction layer (NAL) unit structured video in the ISO base media 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<ref>[https://www.iso.org/standard/57367.html ISO/IEC 14496-16] {{Webarchive|url=https://web.archive.org/web/20170830235735/https://www.iso.org/standard/57367.html |date=2017-08-30 }}</ref>
| 2004
| 2011<ref>{{Cite web | url= https://www.iso.org/standard/57367.html | title= ISO/IEC 14496-16:2011&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 16: Animation Framework eXtension (AFX) | publisher= ISO | access-date= 2017-08-30 | archive-date= 2017-08-30 | archive-url= https://web.archive.org/web/20170830235735/https://www.iso.org/standard/57367.html | url-status= live }}</ref>
| 2016<ref>{{Cite web|url= https://www.iso.org/standard/63521.html | title=ISO/IEC 14496-16:2011/Amd 3:2016&nbsp;– Printing material and 3D graphics coding for browsers | access-date = 2017-08-30}}</ref>
| 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.
|-
| [[MPEG-4 Part 17|Part 17]]
| ISO/IEC 14496-17<ref>[https://www.iso.org/standard/39478.html ISO/IEC 14496-17] {{Webarchive|url=https://web.archive.org/web/20170830234409/https://www.iso.org/standard/39478.html |date=2017-08-30 }}</ref>
| 2006
| 2006<ref>{{Cite web | url=https://www.iso.org/standard/39478.html | title=ISO/IEC 14496-17:2006&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 17: Streaming text format | publisher=ISO | access-date=2017-08-30 | archive-date=2017-08-30 | archive-url=https://web.archive.org/web/20170830234409/https://www.iso.org/standard/39478.html | url-status=live }}</ref>
| 
| [[MPEG-4 Part 17|Streaming text format]]
| Timed Text subtitle format
|-
| Part 18
| ISO/IEC 14496-18<ref>[https://www.iso.org/standard/40151.html ISO/IEC 14496-18] {{Webarchive|url=https://web.archive.org/web/20170830235438/https://www.iso.org/standard/40151.html |date=2017-08-30 }}</ref>
| 2004
| 2004<ref>{{Cite web| url= https://www.iso.org/standard/40151.html |title=ISO/IEC 14496-18:2004&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 18: Font compression and streaming | publisher = ISO | access-date= 2017-08-30}}</ref>
| 2014
| Font compression and streaming
| For Open Font Format defined in Part 22.
|-
| Part 19
| ISO/IEC 14496-19<ref>[https://www.iso.org/standard/40152.html ISO/IEC 14496-19] {{Webarchive|url=https://web.archive.org/web/20170830234100/https://www.iso.org/standard/40152.html |date=2017-08-30 }}</ref>
| 2004
| 2004<ref>{{Cite web | url= https://www.iso.org/standard/40152.html | title= ISO/IEC 14496-19:2004&nbsp;– Information technology&nbsp;– Coding of audio-visual objects&nbsp;— Part 19: Synthesized texture stream | publisher= ISO | access-date= 2017-08-30 | archive-date= 2017-08-30 | archive-url= https://web.archive.org/web/20170830234100/https://www.iso.org/standard/40152.html | url-status= live }}</ref>
| 
| Synthesized texture stream
| Synthesized texture streams are used for creation of very low bitrate synthetic video clips.
|-
| [[MPEG-4 Part 20|Part 20]]
| ISO/IEC 14496-20<ref>[https://www.iso.org/standard/52454.html ISO/IEC 14496-20] {{Webarchive|url=https://web.archive.org/web/20170830235853/https://www.iso.org/standard/52454.html |date=2017-08-30 }}</ref>
| 2006
| 2008<ref>{{Cite web | url= https://www.iso.org/standard/52454.html | title= ISO/IEC 14496-20:2008&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 20: Lightweight Application Scene Representation (LASeR) and Simple Aggregation Format (SAF) | publisher= ISO | access-date= 2017-08-30 | archive-date= 2017-08-30 | archive-url= https://web.archive.org/web/20170830235853/https://www.iso.org/standard/52454.html | url-status= live }}</ref>
| 2010
| [[MPEG-4 Part 20|Lightweight Application Scene Representation (LASeR) and Simple Aggregation Format (SAF)]]
| LASeR requirements (compression efficiency, code and memory footprint) are fulfilled by building upon the existing the [[Scalable Vector Graphics]] (SVG) format defined by the World Wide Web Consortium.<ref>{{Cite web |url=http://mpeg.chiariglione.org/technologies/mpeg-4/mp04-lsr/ |title=MPEG-4 LASeR white paper |date=July 2005 |access-date=2010-04-11 |archive-date=2011-11-23 |archive-url=https://web.archive.org/web/20111123041421/http://mpeg.chiariglione.org/technologies/mpeg-4/mp04-lsr/ |url-status=live }}</ref>
|-
| Part 21
| ISO/IEC 14496-21<ref>[https://www.iso.org/standard/41733.html ISO/IEC 14496-21]</ref>
| 2006
| 2006<ref name="mpeg4-part21">{{Cite web | url=https://www.iso.org/standard/41733.html | title=ISO/IEC 14496-21:2006&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 21: MPEG-J Graphics Framework eXtensions (GFX) | publisher=ISO | access-date=2017-08-30 | archive-date=2017-08-31 | archive-url=https://web.archive.org/web/20170831000400/https://www.iso.org/standard/41733.html | url-status=live }}</ref>
| 
| MPEG-J Graphics Framework eXtensions (GFX)
| Describes a lightweight programmatic environment for advanced interactive multimedia applications&nbsp;– a framework that marries a subset of the MPEG standard [[Java application]] environment (MPEG-J) with a [[Java API]].<ref name="MPEG-J White Paper"/><ref name="mpeg4-part21" /><ref>{{Cite web |url= http://mpeg.chiariglione.org/faq/mp4-sys/sys-faq-mpegj.htm |title= MPEG-4 Systems MPEG-J |date= July 2001 |access-date= 2010-04-11 |archive-date= 2010-02-23 |archive-url= https://web.archive.org/web/20100223074833/http://mpeg.chiariglione.org/faq/mp4-sys/sys-faq-mpegj.htm |url-status= live }}</ref><ref>{{Cite web |url=http://mpeg.chiariglione.org/technologies/mpeg-4/mpj-gfx/ |title=MPEG-J GFX white paper |date=July 2005 |access-date=2010-04-11 |archive-date=2011-11-23 |archive-url=https://web.archive.org/web/20111123035146/http://mpeg.chiariglione.org/technologies/mpeg-4/mpj-gfx/ |url-status=live }}</ref> (at "FCD" stage in July 2005, FDIS January 2006, published as ISO standard on 2006-11-22).
|-
| Part 22
| ISO/IEC 14496-22<ref>[https://www.iso.org/standard/66391.html ISO/IEC 14496-22]</ref>
| 2007
| 2015<ref>{{Cite web | url=https://www.iso.org/standard/66391.html | title=ISO/IEC 14496-22:2009&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 22: Open Font Format | publisher=ISO | access-date=2017-08-30 | archive-date=2017-08-30 | archive-url=https://web.archive.org/web/20170830233903/https://www.iso.org/standard/66391.html | url-status=live }}</ref>
| 2017
| [[Open Font Format]]
| OFFS is based on the [[OpenType]] version 1.4 font format specification, and is technically equivalent to that specification.<ref>{{Cite web |url= http://mpeg.chiariglione.org/technologies/mpeg-4/mp04-off/ |title= ISO/IEC 14496-22 "Open Font Format" |author=((ISO/IEC JTC 1/SC 29/WG 11)) |publisher= Chiariglione |date= July 2008 |access-date= 2010-02-09 |archive-date= 2011-11-23 |archive-url= https://web.archive.org/web/20111123041723/http://mpeg.chiariglione.org/technologies/mpeg-4/mp04-off/ |url-status= live }}</ref><ref>{{Cite web |url=http://standards.iso.org/ittf/PubliclyAvailableStandards/c043466_ISO_IEC_14496-22_2007(E).zip |edition=first |title=ISO/IEC 14496-22 Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 22: Open Font Format |format=Zip |date=2007-03-15 |access-date=2010-01-28 |archive-date=2019-12-18 |archive-url=https://web.archive.org/web/20191218185248/https://standards.iso.org/ittf/PubliclyAvailableStandards/c043466_ISO_IEC_14496-22_2007(E).zip |url-status=live }}</ref> Reached "CD" stage in July 2005, published as ISO standard in 2007
|-
| Part 23
| ISO/IEC 14496-23<ref>[https://www.iso.org/standard/45531.html ISO/IEC 14496-23]</ref>
| 2008
| 2008<ref>{{Cite web| url= https://www.iso.org/standard/45531.html | title = ISO/IEC 14496-23:2008&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 23: Symbolic Music Representation | publisher=ISO | access-date= 2017-08-30}}</ref>
| 
| 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<ref>[https://www.iso.org/standard/46461.html ISO/IEC TR 14496-24] {{Webarchive|url=https://web.archive.org/web/20170831000530/https://www.iso.org/standard/46461.html |date=2017-08-31 }}</ref>
| 2008
| 2008<ref>{{Cite web | url= https://www.iso.org/standard/46461.html | title= ISO/IEC TR 14496-24:2008&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 24: Audio and systems interaction | publisher= ISO | access-date= 2017-08-30 | archive-date= 2017-08-31 | archive-url= https://web.archive.org/web/20170831000530/https://www.iso.org/standard/46461.html | url-status= live }}</ref>
| 
| Audio and systems interaction
| Describes the desired joint behavior of MPEG-4 File Format and MPEG-4 Audio.
|-
| Part 25
| ISO/IEC 14496-25<ref>[https://www.iso.org/standard/57755.html ISO/IEC 14496-25] {{Webarchive|url=https://web.archive.org/web/20170830234052/https://www.iso.org/standard/57755.html |date=2017-08-30 }}</ref>
| 2009
| 2011<ref>{{Cite web | url= https://www.iso.org/standard/57755.html | title= ISO/IEC 14496-25:2011&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 25: 3D Graphics Compression Model | publisher= ISO | access-date= 2017-08-30 | archive-date= 2017-08-30 | archive-url= https://web.archive.org/web/20170830234052/https://www.iso.org/standard/57755.html | url-status= live }}</ref>
| 
| 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<ref>[https://www.iso.org/standard/53750.html ISO/IEC 14496-26] {{Webarchive|url=https://web.archive.org/web/20170831000006/https://www.iso.org/standard/53750.html |date=2017-08-31 }}</ref>
| 2010
| 2010<ref>{{Cite web |url= https://www.iso.org/standard/53750.html |title= ISO/IEC 14496-26:2010&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 26: Audio conformance |publisher= ISO |access-date= 2017-08-30 |archive-date= 2017-08-31 |archive-url= https://web.archive.org/web/20170831000006/https://www.iso.org/standard/53750.html |url-status= live }}</ref>
| 2016
| Audio Conformance
|
|-
| Part 27
| ISO/IEC 14496-27<ref>[https://www.iso.org/standard/53751.html ISO/IEC 14496-27] {{Webarchive|url=https://web.archive.org/web/20170830235958/https://www.iso.org/standard/53751.html |date=2017-08-30 }}</ref>
| 2009
| 2009<ref>{{Cite web|url= https://www.iso.org/standard/53751.html |title=ISO/IEC 14496-27:2009&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 27: 3D Graphics conformance | publisher=ISO |access-date=2017-08-30}}</ref>
| 2015<ref>{{Cite web|url=https://www.iso.org/standard/65392.html | title= ISO/IEC 14496-27:2009/Amd 6:2015&nbsp;– Pattern-based 3D mesh coding conformance | author = ISO |access-date=2017-08-30}}</ref>
| 3D Graphics conformance
| 3D Graphics Conformance summarizes the requirements, cross references them to characteristics, and defines how conformance with them can be tested. Guidelines are given on constructing tests to verify decoder conformance.
|-
| Part 28 || ISO/IEC 14496-28<ref>[https://www.iso.org/standard/59240.html ISO/IEC 14496-28]</ref>
| 2012
| 2012<ref>{{Cite web| url= https://www.iso.org/standard/59240.html | title= ISO/IEC CD 14496-28&nbsp;– Information technology&nbsp;— Coding of audio-visual objects&nbsp;— Part 28: Composite font representation  | publisher=ISO |access-date=2017-08-30}}</ref>
| 
| Composite font representation
| 
|-
| Part 29
| ISO/IEC 14496-29<ref>[https://www.iso.org/standard/61159.html ISO/IEC 14496-29] {{Webarchive|url=https://web.archive.org/web/20170831000344/https://www.iso.org/standard/61159.html |date=2017-08-31 }}</ref>
| 2014
| 2015
| 
| Web video coding
| Text of Part 29 is derived from Part 10 - ISO/IEC 14496-10. Web video coding is a technology that is compatible with the Constrained Baseline Profile of ISO/IEC 14496-10 (the subset that is specified in Annex A for Constrained Baseline is a normative specification, while all remaining parts are informative). 
|-
| Part 30
| ISO/IEC 14496-30<ref>[https://www.iso.org/standard/63107.html ISO/IEC 14496-30]</ref>
| 2014
| 2014
| 
| Timed text and other visual overlays in ISO base media file format
| It describes the carriage of some forms of timed text and subtitle streams in files based on ISO/IEC 14496-12 - W3C [[Timed Text Markup Language]] 1.0, W3C [[WebVTT]] (Web Video Text Tracks). The documentation of these forms does not preclude other definition of carriage of timed text or subtitles; see, for example, 3GPP Timed Text (3GPP TS 26.245). 
|-
| Part 31
| ISO/IEC 14496-31<ref>[https://www.iso.org/standard/66062.html ISO/IEC 14496-31]{{Dead link|date=June 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
| Under development (2018-05)
| 
| 
| Video Coding for Browsers
| Video Coding for Browsers (VCB) - a video compression technology that is intended for use within World Wide Web browser
|-
| Part 32
| ISO/IEC CD 14496-32<ref>[https://www.iso.org/standard/75398.html ISO/IEC CD 14496-32]</ref>
| Under development
|
|
| Conformance and reference software
|
|-
| [[Internet Video Coding|Part 33]]
| ISO/IEC FDIS 14496-33<ref>[https://www.iso.org/standard/69714.html ISO/IEC FDIS 14496-33]</ref>
| Under development
| 
| 
| [[Internet Video Coding|Internet video coding]]
| 
|}

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==
{{See|MPEG-4 Part 2#Patent holders}}

MPEG-4 contains patented technologies, the use of which requires licensing in countries that acknowledge [[software patent|software algorithm patents]]. Over two dozen companies claim to have patents covering MPEG-4. [[MPEG LA]]<ref>{{Cite web |url=http://www.mpegla.com/main/programs/M4V/Pages/Intro.aspx |title=MPEG Licensing Authority – MPEG-4 Visual: Introduction |access-date=2011-01-07 |archive-url=https://web.archive.org/web/20180626135353/http://www.mpegla.com/main/programs/M4V/Pages/Intro.aspx |archive-date=2018-06-26 |url-status=dead}}</ref> 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<ref>{{Cite web |url=http://www.mpegla.com/main/programs/M4S/Pages/Intro.aspx |title=MPEG Licensing Authority – MPEG-4 Systems: Introduction |access-date=2011-01-07 |archive-url=https://web.archive.org/web/20110122184315/http://www.mpegla.com/main/programs/M4S/Pages/Intro.aspx |archive-date=2011-01-22 |url-status=dead}}</ref> 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.<ref>[https://web.archive.org/web/20101121025049/http://www.mpegla.com/main/programs/M4S/Pages/PatentList.aspx MPEG LA&nbsp;– Patent List]</ref>

The majority of patents used for the MPEG-4 Visual format are held by three Japanese companies: [[Mitsubishi Electric]] (255 patents), [[Hitachi]] (206 patents), and [[Panasonic]] (200 patents).

==See also==
* [[MPEG]]
* [[MPEG-4 Structured Audio]]
* [[MPEG-4 SLS]]
* [[ISO/IEC JTC 1/SC 29]]

==References==
{{Reflist}}

== External links ==
* [http://mpeg.chiariglione.org/standards/mpeg-4/mpeg-4.htm Overview of the MPEG-4 Standard] {{Webarchive|url=https://web.archive.org/web/20100327042022/http://mpeg.chiariglione.org/standards/mpeg-4/mpeg-4.htm |date=2010-03-27 }} at the MPEG Official Website
* {{webarchive |url=https://archive.today/20121022022747/http://www.m4if.org/mpeg4/ |title=MPEG Industry Forum (MPEGIF) MPEG-4 page |date=2012-10-22}}
* {{webarchive |url=http://webarchive.loc.gov/all/20100108135001/http://www.m4if.org/public/documents/vault/MPEG4WhitePaperV2a.zip |title=MPEG Industry Forum (MPEGIF) MPEG-4 White Paper |date=2010-01-08}}
* [http://iphome.hhi.de/suehring/tml/ JM MPEG-4 AVC /H.264 Reference Code] {{Webarchive|url=https://web.archive.org/web/20150802074706/http://iphome.hhi.de/suehring/tml/ |date=2015-08-02 }}
* [https://sourceforge.net/projects/openipmp/ OpenIPMP: Open Source DRM Project for MPEG-4] {{Webarchive|url=https://web.archive.org/web/20070210034159/http://sourceforge.net/projects/openipmp |date=2007-02-10 }}

{{Compression formats}}
{{ISO standards}}
{{MPEG}}
{{List of International Electrotechnical Commission standards}}

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[[Category:MPEG-4| ]]
[[Category:Audio codecs]]
[[Category:ISO/IEC standards]]
[[Category:Video codecs]]
[[Category:Videotelephony]]