MPEG-4 - Revision history

Pepoluan: Category:Codecs, outline fixed

2006-09-11T22:23:41Z

Category:Codecs, outline fixed

← Older revision		Revision as of 22:23, 11 September 2006
Line 5:		Line 5:
	Most of the features included in MPEG-4 are left to individual developers to implement. This means that there are very few complete implementations of the MPEG-4 standard. Anticipating this, the developers added the concept of "Profiles," allowing various capabilities to be grouped together.		Most of the features included in MPEG-4 are left to individual developers to implement. This means that there are very few complete implementations of the MPEG-4 standard. Anticipating this, the developers added the concept of "Profiles," allowing various capabilities to be grouped together.

			==Layers==
	MPEG-4 consists of several standards — termed "Layers" — as follows.		MPEG-4 consists of several standards — termed "Layers" — as follows.

Line 19:		Line 20:
	MPEG-7 and MPEG-21 serve other purposes.		MPEG-7 and MPEG-21 serve other purposes.

	==~~==See==~~==		==Additional Reading==
	* [[MPEG-4 Visual]]		* [[MPEG-4 Visual]]
	* [[AAC]]		* [[AAC]]
	* [[MPEG-4 Systems]]		* [[MPEG-4 Systems]]
	* http://forum.doom9.org/showthread.php?s=&threadid=73022		* http://forum.doom9.org/showthread.php?s=&threadid=73022


			[[Category:Codecs]]

Rjamorim: Loots of cleanup

2005-03-30T20:43:16Z

Loots of cleanup

80.218.58.217 at 00:29, 18 October 2004

2004-10-18T00:29:20Z

← Older revision		Revision as of 00:29, 18 October 2004
Line 1:		Line 1:
	'''MPEG-4''' is ~~ISO'~~s ~~stadard~~ for ~~encoding~~ audio, video and other ~~content~~.		'''MPEG-4''', introduced in [[1998]], is the [[name\|designation]] for a group of [[audio]] and [[video]] [[coding]] [[standard\|standards]] agreed upon by [[MPEG]] (Moving Picture Experts Group). MPEG-4 is primarily designed to handle low [[bit rate]] content, from 4800 bit/s to approximately 4 Mbit/s. The primary uses for the MPEG-4 standard are web ([[streaming media]]) and [[Compact disc\|CD]] [[distribution]], conversational ([[videophone]]) uses, and [[broadcast]] [[television]].

			MPEG-4 absorbs many of the features of [[MPEG-1]] and [[MPEG-2]], adding new features such as (extended) [[VRML]] support for 3D rendering, object-oriented composite files (including audio, video and VRML objects), support for [[Digital Rights Management]] and various types of interactivity.

			Most of the features included in MPEG-4 are left to individual [[developer]]s to implement. This means that there are very few complete implementations of the MPEG-4 standard. Anticipating this, the developers added the concept of "Profiles," allowing various capabilities to be grouped together.

			MPEG-4 consists of several standards—termed "Layers"—as follows.

			*''Layer 1'' describes synchronization and multiplexing of video and audio.
			*''Layer 2'' is a compression codec for video signals.
			*''Layer 3'' is a compression codec for perceptual coding of audio signals.
			*''Layer 4'' describes procedures for testing compliance.
			*''Layer 5'' describes systems for Software simulation.
			*''Layer 6'' describes Delivery Multimedia Integration Framework (DMIF).
			*''Layer 10'' is an advanced codec for video signals also called [[H.264]].

			The designated container for MPEG-4 content is [[MP4]], which was also defined within MPEG-4.

			[[MPEG-7]] and [[MPEG-21]] serve other purposes.

	====See====		====See====

Latexxx at 07:41, 14 October 2004

2004-10-14T07:41:17Z

New page

'''MPEG-4''' is ISO's stadard for encoding audio, video and other content.

====See====
* [[MPEG-4 Visual]]
* [[AAC]]
* [[MPEG-4 Systems]]
* http://forum.doom9.org/showthread.php?s=&threadid=73022

← Older revision		Revision as of 20:43, 30 March 2005
Line 1:		Line 1:
	'''MPEG-4''', introduced in [[1998]], is the ~~[[name\|~~designation]] for a group of [[audio]] and [[video~~]] [[~~coding~~]] [[standard\|~~standards]] agreed upon by [[MPEG]] (Moving Picture Experts Group). MPEG-4 is primarily designed to handle low [[bit rate]] content, from 4800 bit/s to approximately 4 Mbit/s. The primary uses for the MPEG-4 standard are web ([[streaming media]]) and [[Compact disc~~\|CD]] [[~~distribution]], conversational ([[videophone]]) uses, and [[broadcast~~]] [[~~television]].		'''MPEG-4''', introduced in 1998, is the designation for a group of audio and video coding standards agreed upon by the [[MPEG]] (Moving Picture Experts Group). MPEG-4 is primarily designed to handle low bit rate content, from 4800 bit/s to approximately 4 Mbit/s. The primary uses for the MPEG-4 standard are web (streaming media) and Compact disc distribution, conversational (videophone) uses, and broadcast television.

	MPEG-4 absorbs many of the features of [[MPEG-1]] and [[MPEG-2]], adding new features such as (extended) [[VRML]] support for 3D rendering, object-oriented composite files (including audio, video and VRML objects), support for [[Digital Rights Management]] and various types of interactivity.		MPEG-4 absorbs many of the features of [[MPEG-1]] and [[MPEG-2]], adding new features such as (extended) VRML support for 3D rendering, object-oriented composite files (including audio, video and VRML objects), support for Digital Rights Management and various types of interactivity.

	Most of the features included in MPEG-4 are left to individual ~~[[developer]]s~~ to implement. This means that there are very few complete implementations of the MPEG-4 standard. Anticipating this, the developers added the concept of "Profiles," allowing various capabilities to be grouped together.		Most of the features included in MPEG-4 are left to individual developers to implement. This means that there are very few complete implementations of the MPEG-4 standard. Anticipating this, the developers added the concept of "Profiles," allowing various capabilities to be grouped together.

	MPEG-4 consists of several standards—termed "Layers"—as follows.		MPEG-4 consists of several standards — termed "Layers" — as follows.

	*''Layer 1'' describes synchronization and multiplexing of video and audio.		* ''Layer 1'' describes synchronization and multiplexing of video and audio.
	*''Layer 2'' is a compression codec for video signals.		* ''Layer 2'' is a compression codec for video signals.
	*''Layer 3'' is a compression codec for perceptual coding of audio signals.		* ''Layer 3'' is a compression codec for perceptual coding of audio signals.
	*''Layer 4'' describes procedures for testing compliance.		* ''Layer 4'' describes procedures for testing compliance.
	*''Layer 5'' describes systems for Software simulation.		* ''Layer 5'' describes systems for Software simulation.
	*''Layer 6'' describes Delivery Multimedia Integration Framework (DMIF).		* ''Layer 6'' describes Delivery Multimedia Integration Framework (DMIF).
	*''Layer 10'' is an advanced codec for video signals also called [[H.264]].		* ''Layer 10'' is an advanced codec for video signals also called [[H.264]].

	The designated container for MPEG-4 content is [[MP4]], which was also defined within MPEG-4.		The designated container for MPEG-4 content is [[MP4]], which was also defined within MPEG-4.

	[[MPEG-7]] and [[MPEG-21]] serve other purposes.		MPEG-7 and MPEG-21 serve other purposes.

	====See====		====See====