Dolby TrueHD

Dolby TrueHD,

Developed by Dolby Laboratories, is an advanced lossless audio codec based on Meridian Lossless Packing. Support for the codec was mandatory for HD DVD and is optional for Blu-ray Disc hardware. TrueHD supports 24-bit, 96 kHz audio channels at up to 18 Mbit/s over 14 channels (HD DVD and Blu-ray Disc standards currently limit the maximum number of audio channels to eight). It also supports extensive metadata, including dialog normalization and Dynamic Range Control.
Channel configurationsAlthough most commonly associated with the 5.1 channel configuration, Dolby Digital allows a number of different channel selections. The full list of available options are:
Mono (Center only)
2-channel stereo (Left + Right), optionally carrying matrixed Dolby Surround
3-channel stereo (Left, Center, Right)
2-channel stereo with mono surround (Left, Right, Surround)
3-channel stereo with mono surround (Left, Center, Right, Surround)
4-channel quadraphonic (Left, Right, Left Surround, Right Surround)
5-channel surround (Left, Center, Right, Left Surround, Right Surround)

Dolby Digital Plus

Immerse Yourself in Next-Generation Surround Sound

Ready to take your surround sound experience to the next level? Dolby® Digital Plus makes it possible with innovative technology that delivers superior audio quality. Would you expect anything less from Dolby?
Dolby Digital Plus gives you access to more content and lets you experience all of the enveloping surround sound that Blu-ray Disc™, high-definition (HD) broadcast, and streamed and downloaded media make possible. With up to 7.1 channels of premium-quality surround sound, you’ll follow the action with your eyes and your ears. When listening to your music or watching movies, you'll feel the explosive power of dazzling special effects and hear every sound as the artist or director intended.
Make the move to next-generation surround sound—just look for the Dolby Digital Plus logo. Then get ready to experience the stunning surround sound that Dolby Digital Plus delivers.

 

Dolby Digital Plus Benefit

Dolby Digital Live

Dolby Digital Live (DDL) is a real-time hardware encoding technology for interactive media such as video games. It converts any audio signals on a PC or game console into the 5.1-channel Dolby Digital format and transports it via a single S/PDIF cable. A similar technology known as DTS Connect is available from competitor DTS.

Dolby Digital Surround EX

The Cinema Version of "Dolby Digital EX" is called Dolby Digital Surround Ex and works the same way. Dolby Digital Surround EX was co-developed by Dolby and Lucasfilm THX in time for the release in May 1999 of Star Wars Episode I: The Phantom Menace.

Dolby Digital Ex

Dolby Digital EX is similar in practice to Dolby's earlier Pro-Logic format, which utilized matrix technology to add a center channel and single rear surround channel to stereo soundtracks. EX adds an extension to the standard 5.1 channel Dolby Digital codec in the form of matrixed rear channels, creating 6.1 or 7.1 channel output. However, the format is not considered a true 6.1 or 7.1 channel codec because it lacks the capability to support a discrete 6th channel unlike the competing DTS-ES codec.

Dolby Pro Logic IIz

Dolby® Pro Logic® IIz adds front height channels to surround sound, creating a 7.1 or 9.1 playback system for home music, movies, and video games. Dolby Pro Logic IIz brings enhanced spatial effects, added depth, and an overall airiness to the listening experience.

Dolby Pro Logic IIx

Dolby® Pro Logic® IIx is an extension of Dolby Pro Logic II matrixing technology that delivers enveloping 6.1 and 7.1 surround sound from both stereo and 5.1 content.

Dolby Pro Logic II

Dolby® Pro Logic® II is an advanced matrixing technology that delivers convincing, realistic surround sound from stereo content.

Provides compelling five-channel surround sound from any stereo program source, including TV broadcasts, movies, video games, and music

Dolby Digital 5.1 Creator

Dolby® Digital 5.1 Creator is an efficient audio coding technology that lets consumers record high-quality Dolby Digital 5.1-channel audio on camcorders, digital still cameras, optical disc or hard disk recorders, personal video recorders (PVRs), and DVD-Videos and Blu-ray Discs authored on PCs.

Saves substantial space on recording media compared to PCM while maintaining high multichannel audio quality