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 | RealAudio, Version 10, AAC Codec |
| Description | Recommended by RealMedia for use when delivered bitrates greater than 128 kb/s. RealMedia promotional literature states "for consumer music services, as well as easy transfer and playback compatibility to the extensive range of portable and mobile devices that support AAC." |
| Production phase | Generally a final-state (end-user delivery) format. |
| Relationship to other formats | |
| Subtype of | RealAudio_10 |
| Contains | AAC (MPEG-2 Advanced Audio Coding) |
| LC experience or existing holdings | See RealAudio_10 |
| LC preference | See RealAudio_10 |
| Disclosure | See RealAudio_10 |
| Documentation | See RealAudio_10 |
| Adoption | See RealAudio_10 |
| Licensing and patent claims | See RealAudio_10 |
| Transparency | See RealAudio_10, and AAC (MPEG-2 Advanced Audio Coding). |
| Self-documentation | See RealAudio_10 |
| External dependencies | See RealAudio_10 |
| Technical protection considerations | See RealAudio_10 |
| Normal rendering | Good support. |
| Fidelity (support for high audio resolution) | Good; promotional literature says that this codec provides "the highest quality listening experience for consumer music services." |
| Support for multiple channels | See RealAudio_10 |
| Support for downloadable or user-defined sounds, samples, and patches | Not applicable |
| Functionality beyond normal video rendering | See RealAudio_10 |
| Tag type | Value | Note |
| Filename Extension | ra | Note that streaming applications require an associated ram (RealMedia Metafile) file. |
| Internet Media Type | See RealAudio_10 | |
| Magic numbers | See RealAudio_10 |
| General | |
| History |
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URLs
See RealAudio_10
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