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 14496-10:2003. Information technology -- Coding of audio-visual objects -- Part 10: Advanced Video Coding (formal name)MPEG-4, Advanced Video Coding, Extensions (common name) |
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| Description | Extended version of the compression encoding for video documented as Advanced Video Coding (AVC) in part 10 of the ISO/IEC 14496 standard. The extensions are ones that require the use of MP4_FF_AVCE (MPEG-4 file format for extended AVC) as a wrapper, and they include independent and disposable sample boxes, sample groups, random access recovery points, or new structures in movie fragments. It is not clear to the compiler of this document what relationship may obtain between these extensions and MPEG-4_AVC_EP (Advanced Video Coding, Extended Profile); comments are welcome. 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. |
| Relationship to other formats | |
| Subtype of | MPEG-4_AVC, MPEG-4, Advanced Video Coding (Part 10) |
| Used by | MP4_FF_AVCE_AVCE, MPEG-4 File Format for AVC (Ext), with Non-FRExt Extended AVC Coding |
| LC experience or existing holdings | |
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| LC preference |
| Disclosure | Open standard. Developed by ISO technical program JTC 1/SC 29 (WG11), aka the Motion Picture Experts Group (MPEG). See |
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| Documentation | ISO/IEC 14496-10:2003. Information technology -- Coding of audio-visual objects -- Part 10: Advanced Video Coding. Additional information in ISO/IEC 14496-15:2004. Information technology -- Coding of audio-visual objects -- Part 15: Advanced Video Coding (AVC) file format |
| Adoption | See MPEG-4_AVC. MPEG-4_AVC_EXT may prove to be an unused option within the standard; Comments welcome. |
| Licensing and patents | See MP4_FF_2. |
| Transparency | Depends upon algorithms and tools to read; will require sophistication to build tools. |
| Self-documentation | Pertains to the file format; some relevant information in MP4_FF_2. |
| External dependencies | None |
| Technical protection considerations | Pertains to the file format; some relevant information in MP4_FF_2. |
| Moving Image | |
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| Normal rendering | Good support. |
| Clarity (high image resolution) | Not investigated at this time; comments about the format are welcome. |
| Functionality beyond normal rendering | Not investigated at this time. |
| Sound | |
| Normal rendering | Not relevant; some information in MP4_FF_2. |
| Fidelity (high audio resolution) | Not relevant; some information in MP4_FF_2. |
| Multiple channels | Not relevant; some information in MP4_FF_2. |
| Functionality beyond normal rendering | Not relevant; some information in MP4_FF_2. |
| Tag | Value | Note |
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| Filename extension | See note |
See MP4_FF_AVCE |
| Internet Media Type | See note |
See MP4_FF_AVCE |
| Magic numbers | See note |
See MP4_FF_AVCE |
| File type brand (ISO Base Media File Format) | See note |
See MP4_FF_AVCE |
| General | AVC bitstreams without a specified profile or with one of three profiles listed in Part 10 (Baseline, MPEG-4_AVC_BP; Main, MPEG-4_AVC_MP; and Extended, MPEG-4_AVC_EP) are wrapped in MP4_FF_2. AVC coding with the extensions listed in this document, however, requires the use of MP4_FF_AVCE as a wrapper. The compiler of this document seeks comments and clarifications regarding the preceding statements. |
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| History |
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