About This Initiative
Started in 2007, this is a collaborative effort by federal agencies to define common guidelines, methods, and practices for digitizing historical content. As part of this, two working groups are studying issues specific to two major areas, Still Image and Audio Visual.
This group is involved in a cooperative effort to develop common digitization guidelines for still image materials.
The goal for this working group is to identify, establish, and disseminate information about standards and practices for the digital reformatting of audio-visual materials.
- File Format Comparison Projects
Posted by Working Group | April 17, 2014
Matrix-based comparisons of still image (ready now) and video (coming soon) formats relevant to preservation planning. Formats are compared in terms of sustainability, cost, system implementation, and quality and functionality.
- Audio Analog-to-Digital Converter Performance
Approved by Working Group | August 20, 2012
This guideline concerns metrics and measurement methods for analog-to-digital converters. Future performance-related documents will discuss the problem of interstitial errors, i.e., accidental loss or transformations of audio samples within the digitizing system before the data stream is written to file.
- Embedding Metadata in Broadcast WAVE Files
Approved by Working Group | April 23, 2012
Version 2 of the guideline for metadata to be embedded in Broadcast WAVE files that reproduce historical and cultural heritage digital sound recordings.
- Technical Guidelines for the Still Image Digitization of Cultural Heritage Materials
Updated by Working Group | August 24, 2010
Creation of Raster Image Master Files represents shared best practices followed by agencies participating in the Federal Agencies Digitization Guidelines Initiative (FADGI) Still Image Working Group for digitizing cultural heritage material.
- MXF Application Specification for Moving Image and other Audio-Visual Content
Draft under development
The MXF Application Specification for Archiving and Preservation is a detailed specification for a file "wrapper" intended to serve reformatting programs in which an archive is making a digital-file copy of a videotape or motion picture film, as well as to serve as a container for born-digital content when the native encoded essence is judged suitable for retention for at least the medium term.
News & Events
- Digitization format comparisons: still image formats now, video formats soon
Documents posted April 17, 2014
- AV Artifact Atlas: By the People, For the People (LC, January 2014)
- Can I Get a Sample of That? Digital File Format Samples and Test Sets (LC, December 2013)
- On the Road with FADGI: Recent Conference Presentations Highlight Current Audio and Video Projects (LC, November 2013)
- Connecting Communities: FADGI Still Image Working Group’s Impact on the Library of Congress and Beyond (LC, November 2013)
- One Format Does Not Fit All: FADGI Audio-Visual Working Group’s Diverse Approaches to Format Guidance (LC, October 2013)
The following are provided as resources for the digitization of both audio-visual and still image digital content.
- JPEG 2000 Lossy Compression (PDF, 1.6 MB)
- Digital Imaging Standards
- Evaluating Still Image Digitization and Digitization Equipment (PDF, 2.5 MB)
- “Format Considerations in Audio Visual Preservation Reformatting” (PDF, 528 KB)
Last Updated: 04/21/2014