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
For access, MP3s of 128 kbps will be made available.

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)
Audio: BWF Format, 24-bit and 96 kHz/48kHz (depending upon the source material)
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

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