Digitization & Metadata Standards for the National Cultural Audiovisual Archives Project
Audio & Video Digitization Standards
Analog Audio Digitization
The file with the following specifications will serve as the highest-quality archival master that will be maintained in perpetuity.
- BWF Format
- Encoded to Linear Pulse Code Modulation (LPCM)
- Sampling Frequency: 96 KHz/48 KHz (depending upon the source material)
- Bit Depth: 24-bit (original digital material of 16-bit should be kept as it is)
- Sound Field: as in the original recording
Analog Video Digitization
The file with the following specifications will serve as the highest-quality archival master that will be maintained in perpetuity.
- JPEG 2000 Format
- Wrapper: MXF
- Uncompressed 10-bit 4:2:2
- Frame Rate: 24/25/29.97 fps (depending on the source material)
- Video Bitrate: 27 MB/sec (approximate)
For access, MP4 will be made available.
Digital Video Transfer
The goal in this case would be to match the original resolution and encoding specifications as closely as possible, if not exactly. This file will serve as the highest-quality archival master that will be maintained in perpetuity.
For access, MP4 will be made available.Metadata Standards (Based on Extended Dublin Core Metadata Schema)
| S. No. | Element | Definition / Interpretation |
|---|---|---|
| ADMINISTRATIVE | ||
| 1 | Source |
Name of the Partnering Institution |
| Collection | Name of the Collection (if any) | |
| 2 | Identifier | Accession number |
| 3 | Title |
The main title associated with the recording |
| Alternative | Digital filename, that will be alpha-numeric and will serve as the unique identifier | |
| 4 | Medium | Format of original (analog) recording |
| Extent Original | The size or duration of the original recording | |
| Spatial | Recording location,including topographical coordinates to support map interfaces | |
| Temporal | Context in which the recording was made | |
| Created | Recording date | |
| Condition | Condition of the original (analog)material | |
| 5 | Relation | Reference to related objects like agreement, associated files, reviews, photographs, etc |
| 6 | Rights | Information about rights held in & over the resource |
| DESCRIPTIVE | ||
| 7 | Subject | Controlled list of content coverage |
| Keywords | Hierarchical list detailing out subject listings & groups of keywords | |
| 8 | Description | An abstract and/or description of environmental or cultural context, list of contents, etc |
| 9 | Creator | Director or entity primarily responsible for making the recording |
| 10 | Publisher | Producer/Institution responsible for making the recording available |
| 11 | Contributor | An entity responsible for making contributions to the recording |
| Artist(s) | ||
| Accompanying artist(s) | ||
| Recordist(s) | ||
| Composer(s) | ||
| Lyricist(s) | ||
| Any other | ||
| 12 | Date | A point or period of time associated with an event in the lifecycle of the recording (Not the recording or production date of the original but a date relating possibly to the broadcast & publication of the recording) |
| 13 | Type | The domain of the recording: audio/video |
| 14 | Coverage | The spatial or temporal topic of the recording, such as a cultural feature of traditional songs or a dialect |
| 15 | Language | Language(s) of the recording |
| Dialect | Dialect(s) of the language(s) of the recording | |
| TECHNICAL | ||
| 16 | Format | Digital file format or dimensions of the resource |
| Codec | ||
| Bit-Rate/Bit-Depth | ||
| Sampling Frequency | ||
| Playback equipment used (Make & model) | ||
| 17 | A-to-D Convertor | Analog to digital convertor used (Make & model) |
| 18 | Extent | Digital file size & duration |
| 19 | Date | Date of digitization |
| 20 | LTO 6 Tape Number | LTO6 tape number on which the digitized file is contained |
| 21 | HDD Number | HDD number on which the digitized file is contained |
| MISCELLANEOUS | ||
| 22 | Remarks | Any additional information not covered under above headings |
