Sustainability of Digital Formats
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Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact |
Full name | RealAudio, Version 10, RealAudio Codec |
Description | Recommended by RealMedia for use when delivered bitrates are 128 kb/s or less, for lower bandwidth streaming. |
Production phase | Generally a final-state (end-user delivery) format. |
Relationship to other formats | |
Subtype of | RealAudio_10 |
Contains | RealAudio codec, not separately documented |
LC experience or existing holdings | RealAudio, including versions earlier than 10 and using the RealAudio codec, is used as streaming format for most audio presented in American Memory, with a target data rate oriented to users with dial-up modems. |
LC preference | Considerations of quality and sustainability mean that WAVE_LPCM is preferred over RealAudio; considerations of sustainability mean that MP3 is preferred. |
Disclosure | See RealAudio_10 |
Documentation | See RealAudio_10 |
Adoption | See RealAudio_10 |
Licensing and patent claims | See RealAudio_10 |
Transparency | See RealAudio_10 |
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) | Moderate; promotional literature says that this codec is "renowned for delivering near CD quality at 64 kbps." |
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 |
URLs
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URLs
• See RealAudio_10
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