Difference between revisions of "Significant characteristics of audio files"
Jump to navigation
Jump to search
| Line 2: | Line 2: | ||
From [http://www.fcla.edu/digitalArchive/formatInfo.htm Florida Digital Archive WAVE preservation Action Plan]: | From [http://www.fcla.edu/digitalArchive/formatInfo.htm Florida Digital Archive WAVE preservation Action Plan]: | ||
| − | *WAVE exhibits the following significant properties | + | *WAVE exhibits the following significant properties. They are the significant properties which the FDA intends to preserve when adopting migration policy in the future. |
**Content: Duration and number of channels. | **Content: Duration and number of channels. | ||
**Context: Title and creating application information. | **Context: Title and creating application information. | ||
| Line 13: | Line 13: | ||
|- | |- | ||
|- style="background-color:#cccccc;" | |- style="background-color:#cccccc;" | ||
| − | !style="width: | + | !style="width:10%"|'''property value''' |
!style="width:10%"|'''component''' | !style="width:10%"|'''component''' | ||
| − | !style="width: | + | !style="width:30%"|'''notes''' |
| − | |||
| − | |||
|- | |- | ||
| − | | | + | |duration |
| − | + | |content | |
| − | |||
| − | | | ||
| | | | ||
|- | |- | ||
| − | | | + | |number of channels |
| − | | | + | |content |
| − | | | + | |May be expressed as a number or as a description such as "mono", "stereo" or "surround" etc. |
| − | |||
| − | |||
|- | |- | ||
| − | | | + | |channel mapping |
| − | | | + | |structure |
| − | |||
| − | |||
| | | | ||
|- | |- | ||
| − | | | + | |sampling frequency |
| − | | | + | |rendering |
| − | + | |This property may not be preserved through transformation to a preservation format, since conversion to WAV entails the use of a sampling frequency that is used by the WAV format (eg 441000 HZ, 48000 HZ, 96000 HZ). However, the sampling frequency of the preservation format should not be lower than that of the original format. | |
| − | |||
| − | | | ||
|- | |- | ||
| − | | | + | |bit depth |
| − | | | + | |rendering |
| − | |the | + | |The bit depth of the preservation format will be 16 bits unless the bit depth of the original format is higher (eg 24 bits). |
| − | |||
| − | |||
|- | |- | ||
|} | |} | ||
Revision as of 15:23, 16 March 2010
Main Page > Documentation > Media type preservation plans > Significant properties > Significant properties of audio files
From Florida Digital Archive WAVE preservation Action Plan:
- WAVE exhibits the following significant properties. They are the significant properties which the FDA intends to preserve when adopting migration policy in the future.
- Content: Duration and number of channels.
- Context: Title and creating application information.
- Behavior: N/A
- Structure: Channel relationship (channel mapping).
- Appearance (Rendering): Sampling frequency and bit-depth.
| property value | component | notes |
|---|---|---|
| duration | content | |
| number of channels | content | May be expressed as a number or as a description such as "mono", "stereo" or "surround" etc. |
| channel mapping | structure | |
| sampling frequency | rendering | This property may not be preserved through transformation to a preservation format, since conversion to WAV entails the use of a sampling frequency that is used by the WAV format (eg 441000 HZ, 48000 HZ, 96000 HZ). However, the sampling frequency of the preservation format should not be lower than that of the original format. |
| bit depth | rendering | The bit depth of the preservation format will be 16 bits unless the bit depth of the original format is higher (eg 24 bits). |