Sustainability of Digital Formats
Planning for Library of Congress Collections
Sustainability of Digital Formats
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| Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact | |
| Full name | ISO/IEC 14496. Information technology -- Coding of audio-visual objects (formal name for set of specifications that include Part 15, MP4 AVC File Format, and Part 10, Advanced Video Coding) MPEG-4 File Format for AVC (Ext), with Extended AVC Coding (common name) |
| 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, 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 | |
| LC preference |
| Disclosure | Open standard. Developed by ISO technical program JTC 1/SC 29 (WG11), aka the Motion Picture Experts Group (MPEG). See http://www.iso.org/iso/en/stdsdevelopment/techprog/workprog/ TechnicalProgrammeSCDetailPage.TechnicalProgrammeSCDetail?COMMID=148. |
| Documentation | See MP4_FF_AVCE and MPEG-4_AVC_EXT. |
| Adoption | See MPEG-4_AVC. |
| Licensing and patent claims | 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. |
| Video elements | |
| Normal rendering for video | See MPEG-4_AVC_EXT. |
| Clarity (support for high image resolution) | See MPEG-4_AVC_EXT. |
| Functionality beyond normal video rendering | Not investigated |
| Sound elements | |
| Fidelity (support for high audio resolution) | See MP4_FF_2. |
| Support for multiple sound channels | See MP4_FF_2. |
| Functionality beyond normal rendering for sound | See MP4_FF_2. |
| Tag type | Value | Note |
| Filename Extension | See MP4_FF_AVCE | |
| Internet Media Type | See MP4_FF_AVCE | |
| Magic numbers | None found | |
| File type brand | See MP4_FF_AVCE |
| General | |
| History |
URLs
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• ISO/IEC 14496-10:2003 Information technology -- Coding of audio-visual objects -- Part 10: Advanced Video Coding
• ISO/IEC 14496-15:2004 Information technology -- Coding of audio-visual objects -- Part 15: Advanced Video Coding (AVC) file format
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