Sustainability of Digital Formats: Planning for Library of Congress Collections |
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Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact |
Full name | Formal Name (for set of specifications that include Part 15, MP4 AVC File Format, and Part 10, Advanced Video Coding): ISO/IEC 14496. Information technology -- Coding of audio-visual objects. Common name: MPEG-4 File Format for AVC (Ext), with Extended AVC Coding. |
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Description |
Combination of a file format (wrapper) and encoding category (Advanced Video Coding; AVC, Extensions) within the MPEG-4 family. This version of AVC entails the use of the extensions listed in MPEG-4_AVC_EXT. The extensions described here predate the FRExt (Fidelity Range Extensions), being finalized in 2005 and represented by four new profiles: MPEG-4_AVC_HP, MPEG-4_AVC_H10P, MPEG-4_AVC_H422P, and MPEG-4_AVC_H444P. |
Production phase | Generally a final-state (end-user delivery) format, may also serve as middle-state format. |
Relationship to other formats | |
Subtype of | MP4_FF_AVCE, MPEG-4 File Format for AVC (Extensions, Part 15) |
Contains | MPEG-4_AVC_EXT, MPEG-4, Advanced Video Coding, Extensions |
May contain | AAC_MP4, MPEG-4 Advanced Audio Coding |
May contain | AAC_MP4_LC, AAC (MPEG-4) Low Complexity Object |
May contain | Additional audio, graphics, and scene graph stream types. Not documented at this time. |
LC experience or existing holdings | |
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LC preference |
Disclosure | Open standard. Developed through ISO technical program ISO/IEC JTC 1/SC 29 for coding of audio, picture, multimedia and hypermedia information. The working group WG11 (for coding of moving pictures and audio) is also known as the Moving Picture Experts Group (MPEG). See the ISO Standards Catalogue for the list of standards published by ISO/IEC JTC1/SC29. See http://mpeg.chiariglione.org/standards/mpeg-4 for information specific to MPEG-4 and its many parts. |
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Documentation | See MP4_FF_AVCE and MPEG-4_AVC_EXT. |
Adoption | See MPEG-4_AVC. |
Licensing and patents | See MP4_FF_2. |
Transparency | See MPEG-4_AVC. |
Self-documentation | See MP4_FF_2. |
External dependencies | See MP4_FF_2. |
Technical protection considerations | See MP4_FF_2. |
Moving Image | |
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Normal rendering | See MPEG-4_AVC_EXT. |
Clarity (high image resolution) | See MPEG-4_AVC_EXT. |
Functionality beyond normal rendering | Not investigated |
Sound | |
Fidelity (high audio resolution) | See MP4_FF_2. |
Multiple channels | See MP4_FF_2. |
Functionality beyond normal rendering | See MP4_FF_2. |
Tag | Value | Note |
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Filename extension | See related format. |
See MP4_FF_AVCE |
Internet Media Type | See related format. |
See MP4_FF_AVCE |
Magic numbers | Not found. | Comments welcome. |
File type brand (ISO Base Media File Format) | See related format. | See MP4_FF_AVCE |
General | |
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History |
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