Dolby Digital Header

Dolby® Digital, also referred to as AC-3, is an advanced audio encoding/decoding technology that efficiently delivers up to 5.1 discrete channels of vibrant surround sound for broadcasting, home theater, cinema, PC, online streaming, and video game programming.

Enables the efficient storage and transmission of high-quality 5.1 digital surround sound

Immerses audiences in the on-screen action

Provides compatibility with millions of existing playback units

Dolby Digital technology ensures that your audience enjoys a rich, enveloping surround sound experience by delivering up to 5.1 discrete audio channels.

Three front channels (Left, Center, and Right) provide crisp, clean dialogue and accurate placement of on-screen sounds, while twin surround channels (Left Surround and Right Surround) immerse the audience in the action.

The Low-Frequency Effects (LFE) channel delivers deep, powerful bass effects that can be felt as well as heard. As it needs only about one-tenth the bandwidth of each of the other channels, the LFE channel is referred to as a “.1” channel.

Already found in thousands of cinemas and millions of homes worldwide, Dolby Digital is the preferred standard in home theater surround sound today.

Why Dolby

Dolby Digital technology helps you produce and deliver stunning sound on a wide range of platforms, including Sony® PlayStation® 3 and Microsoft® Xbox®.

The worldwide audio standard for the DVD format, Dolby Digital brings realistic digital audio to gaming via 5.1 discrete channels that immerse gamers in the action.

Three front channels provide accurate placement of on-screen sound, and an LFE channel delivers real impact for explosions and other effects that can be felt as well as heard.

Dolby’s Game Developer Support Program is ready to supply you with everything you need to create stunning audio with Dolby Digital. And for game publishers, we offer a wide range of marketing support options to help you promote your game titles.

With Dolby Digital, gaming is more exciting, and more engaging, than ever before.

Channels: 1.0 to 5.1, discrete

Data rate: 32–640 kbps, scalable

DVD data rate, 5.1-channel audio: 448 kbps

Blu-ray Disc data rate, 5.1-channel audio: 640 kbps

Supports Dolby metadata: Yes

Connections: S/PDIF, HDMI, IEEE 1394

Mixing/streaming capabilities: Yes

Metadata Parameter
Informational
Control
Dialogue level  
x
Channel mode  
x
LFE channel  
x
Bitstream mode
x
 
Line mode compression  
x
RF mode compression  
x
RF overmodulation protection  
x
Center downmix level  
x
Surround downmix level  
x
Dolby Surround mode  
x
Audio production information
x
 
Mix level
x
 
Room type
x
 
Copyright bit
x
 
Original bitstream
x
 
Preferred stereo downmix  
x
Lt/Rt Center downmix level  
x
Lt/Rt surround downmix level  
x
Lo/Ro Center downmix level
 
x
Lo/Ro surround downmix level  
x
Dolby Digital Surround EX mode  
x
A/D converter type
x
 
DC filter  
x
Lowpass filter  
x
LFE lowpass filter  
x
Surround 3 dB attenuation  
x
Surround phase shift  
x


 
DOCUMENT LIBRARY
Choose from the drop-down menus below to get Dolby professional reference material.