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this is a collaborative effort by federal agencies to define common guidelines, methods, and practices for digitizing historical content.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.

Learn more about the initiative

• 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.

All digitization guidelines

News & Events

• Digitization format comparisons: still image formats now, video formats soon
  Documents posted April 17, 2014

Recent blogs:

• 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)

See all News & Events

Resources

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)

View all Resources