sentences:  In 1995, the LaserDisc version of "Clear and Present Danger" featured the first home theater Dolby Digital mix, quickly followed by "True Lies", "Stargate", "Forrest Gump", and "Interview with the Vampire" among others.Dolby Digital EX is similar in practice to Dolby's earlier Pro Logic format, which utilized matrix technology to add a center surround 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.