Dolby Digital Plus Overview
Dolby® Digital Plus, or Enhanced AC-3 (E-AC-3), is an advanced surround sound audio codec designed specifically for evolving media. From home theaters and PCs to mobile phones and online streaming, Dolby Digital Plus defines high-fidelity audio. You’ll get the renowned Dolby cinema experience from all your entertainment.
Dolby Digital Plus is based on core Dolby Digital technologies, the established standard for cinema, broadcast, and home theater surround sound. As mobile devices proliferate, Dolby Digital Plus is also emerging as the standard for mobile entertainment. Its advanced new technologies for audio enhancement deliver even better sound quality and additional bandwidth savings. You get great content with fewer interruptions, even when bandwidth is limited.
Dolby Digital Plus Benefits
Up to 7.1 discrete channels of clear, high-fidelity surround sound
Ideal audio codec match for HD video codecs
Dolby cinematic audio experience for content across all media
Full 5.1-channel interactive experience for Blu-ray™ BonusView™ and BD-Live™
Full 7.1-channel support for primary Blu-ray soundtracks
Easily converted to Dolby Digital, enabling compatible playback through current Dolby Digital equipped systems
Additional Benefits for Mobile Devices
When incorporated into a mobile device, Dolby Digital Plus adds postprocessing technologies that dramatically improve the device’s audio capabilities and your whole entertainment experience.
Files download or stream faster and more reliably.
Device-specific tuning of mobile speakers gives you natural and louder, distortion-free sound.
Surround Virtualizer creates a surround sound experience through headphones or built-in speakers.
Dialogue Enhancer ensures that every word is heard.
Volume Leveler maintains constant volume across all content and applications.
Intelligent Equalizer dynamically adjusts the audio to achieve the desired tone.
Dolby Digital Pass-Through allows direct home theater connections for a full multichannel experience from mobile devices.
Why Dolby Digital Plus?
Equipment with Dolby Digital Plus technology ensures that you’ll be ready for the future. HD programming with surround sound is now widely available across all media—broadcast, online, PCs, games, and mobile.
Dolby Digital Plus enables cinematic Dolby surround sound for all of it. You’ll be able to download content. Transfer it from one device to another. Take advantage of 7.1-channel programs when they’re offered.
Meanwhile, you’ll get the same Dolby surround sound you enjoy now. See the How It Works tab for more info.
Where You’ll Find Dolby Digital Plus
See our Products tab
for the range of equipment and programming, along with specific examples.
Dolby Digital Plus is supported by HDMI® 1.3 and higher, enabling transmission together with high-definition video through a single cable connection. It is also fully integrated in the DLNA® and UltraViolet™ standards.
Are you a Dolby licensee or looking for more technical details? Learn more about Dolby Digital Plus.