A surround-sound format that matrix-encodes a"back-surround" channel into the left and right surround channels of a 5.1-channel Dolby Digital signal. This back-surround channel is reproduced by one or two loudspeakers located directly behind the listening position. Although Dolby Digital EX is the format's official name, it's often called THX Surround EX because THX was the exclusive licensor of the technology until late 2001. Jointly developed by Lucasfilm THX and Dolby Laboratories.
Referred to as Dolby Digital 6.1, this encoding method adds a matrixed rear surround speaker to Dolby Digital 5.1. Occasionally a second rear surround speaker is added. In this setup, both rear surround speakers produce the same signal, and are typically positioned next to each other. This is referred to as Dolby Digital 7.1.
A Dolby surround sound system that includes a "center rear" channel to the 5.1 playback format. This additional rear surround channel provides increased spatiality and realism for audio effects that pan from front to back as well as enhanced localization of surround channels that originate from directly behind the listener. (see Dolby Digital)
Also referred to as Dolby Digital 6.1, adds a rear, center channel to the existing left, center, right and rear speakers. This format requires a 6.1 processor or receiver and DVDs that are 6.1 encoded.
This is the next generation of Dolby Digital surround sound and incorporates 6.1 discrete channels, adding in a new rear surround center channel. This extra rear surround channel works with the usual left and right surround channels to produce an intensified realism that is designed to draw you even further into the action. In order to receive the 6. channels, you will need a Dolby Digital EX receiver and also 6.1 source material, such as a 6.1 encoded DVD.
Dolby Digital EX is based on standard Dolby Digital technology (see above), but includes an extra "back surround" channel, making it a "6.1" format. This sixth channel is encoded as a matrixed signal within the standard left and right surround channels, and is reproduced by an additional one or two surround speakers.
See 6.1 Channel Surround Sound.
is a "6.1"-channel matrix extended surround sound format for movie theaters. Only movie theaters equipped with Dolby Digital EX playback equipment is able to reproduce the "6.1"-channel extended surround. The home theater version of Dolby Digital EX is also known as Dolby Digital EX or THX Surround EX. Note, we put quotes around the "6.1" because the back surround channel is matrixed, and not fully discrete. back to the previous page