Key facts
- Filename extension
- .ac3
- Internet media type
- audio/ac3
- Uniform type identifier uti
- public.ac3-audio
via Wikipedia infobox
Official website
Dolby Digital 5.1 - Dolby Professional
Dolby Digital 5.1 (AC3) is the standard for home theater, broadcast, and cinema surround sound. Elevate your audio with a high-quality, multichannel experience.
professional.dolby.com →Link to the official site · 13,785 chars · not written by Vinony
~19 min read
Encyclopedic overview
Logo from 2012–2021; introduced in 2007.
Dolby Digital, originally synonymous with Dolby AC-3 (see below), is the name for a family of audio compression technologies developed by Dolby Laboratories. Called Dolby Stereo Digital until 1995, it uses lossy compression (except for Dolby TrueHD). The first use of Dolby Digital was to provide digital sound in cinemas from 35 mm film prints. It has since also been used for TV broadcast, radio broadcast via satellite, digital video streaming, DVDs, Blu-ray discs and game consoles.
Excerpted from Wikipedia’s “Dolby Digital” article, available under the CC BY-SA 4.0 licence.