Sustainability of Digital Formats: Planning for Library of Congress Collections
Sustainability of Digital Formats: Planning for Library of Congress Collections |
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| Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact | |
| Full name | RealAudio, Lossless Codec |
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| Description | Audio compression codec recommended by RealMedia for use by "professional and archiving services." The codec creator report that the compression algorithm generally cuts` file sizes in half. |
| Production phase | Generally a middle-state format, suitable for use in asset management and archiving. |
| Relationship to other formats | |
| Used by | RealAudio_10, RealAudio, Version 10 |
| LC experience or existing holdings | See RealAudio_10 |
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| LC preference | See RealAudio_10 |
| Disclosure | See RealAudio_10 |
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| Documentation | See RealAudio_10 |
| Adoption | See RealAudio_10 |
| Licensing and patents | See RealAudio_10 |
| Transparency | See RealAudio_10 |
| Self-documentation | See RealAudio_10 |
| External dependencies | See RealAudio_10 |
| Technical protection considerations | See RealAudio_10 |
| Sound | |
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| Normal rendering | Good support |
| Fidelity (high audio resolution) | Excellent, although the application may be limited to CD-quality source material (44.1 kHz sampling, 16-bit words). |
| Multiple channels | Not investigated |
| Tag | Value | Note |
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| Filename extension | Not applicable. |
See RealAudio_10 |
| Internet Media Type | Not applicable. |
See RealAudio_10 |
| Magic numbers | Not applicable. |
See RealAudio_10 |
| Microsoft FOURCC | ralf |
For the lossless codec (RealAudio 10), this fourcc code will appear in the RealAudio_10 file wrapper. |
| Pronom PUID | See note. | PRONOM has no corresponding entry as of July 2022. |
| Wikidata Title ID | Q4048055 |
See https://www.wikidata.org/wiki/Q4048055 |
| General | |
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| History |
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