AC3 File Format
Dolby Digital audio files used on DVDs
AC3 is a file extension for surround sound audio files used on DVDs format. The AC3 file format was created by Dolby Labs for use in a Dolby Digital audio on DVD, Blu-ray and other digital video formats. AC3 stands for Audio Coding 3. AC3 increases fidelity over its previous surround sound standard, Pro-logic, with independent tracks for each of the 6 speakers, a 16bit sampling at 48khz rate compressed by 10- 12 times, making for a total bit rate of 384kbps. To reproduce to the full surround sound signal on an AC3 file requires a supported playback device such as DVD player connected to a Dolby Digital-supporting home theater amplifier. It is more common in computer audio for sound cards to interpret AC3 and put out a PCM stream; however some cards can output a Dolby Digital or DTS stream that may be used on with a home theater amplifier. MIME type: audio/ac3 Learn more about AC3 files: Search for answers to AC3-related questions at IT Knowledge Exchange. See our Fast Guide to CD/DVD. We've put together an introduction to audio. Visit the Dolby Labs guide on Understanding Dolby Digital.
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| Last updated on:
Aug 18, 2010 |
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