Dolby ProLogic II
Dolby's original Pro-Logic surround sound system developed in the 1980s used four channels - front left, front right, centre and a mono rear. The rear channel's treble frequencies were also limited. Pro-Logic II is an enhanced version with full range stereo output and greatly improved steering logic. It can be used with any kind of stereo programme - CDs, older film and TV material, games, etc - to give surround sound effects.
Dolby Digital is a form of digital audio coding which makes it possible to store and transmit high quality digital sound. This audio coding can be used for mono, stereo or multi-channel soundtracks
Dolby Digital Plus
Dolby Digital Plus is the next-generation audio format that delivers "better-than-DVD" sound in high-definition media such as Blu-ray (1.7 Mbps). Because it requires less compression and provides more channels (up to 7.1), Dolby Digital Plus also provides new coding efficiencies for future broadcasting (such as HDTV) and streaming of multichannel audio.
DTS-HD is the next generation multi-channel audio format designed for High-definition disc media such as Blu-ray. DTS-HD delivers wider frequency response and greater dynamic range for both movies and music. Higher sampling frequencies and greater bit depth mean more realistic sounds and greater dynamic punch. Music and dialogue will sound more clear and accurate, and the dynamic range of action sound effects will be dramatically improved.
Dolby True HD
Dolby TrueHD is Dolby’s next-generation lossless technology developed for high-definition disc-based media, such as Blu-ray. Dolby TrueHD delivers tantalizing sound that is bit-for-bit identical to the studio master, (up to 18 Mbps) unlocking the true high-definition entertainment experience available on next-generation discs. When coupled with high-definition video, Dolby TrueHD offers an unprecedented home theatre experience that lets you enjoy sound as stunning as the high-definition picture.
HDMI stands for High-Definition Multimedia Interface and offers an easy and convenient way of interconnecting digital audio-video components such as a TV and home cinema. With HDMI, digital signals are not compressed - transmission is direct. And because the signal stays in the digital domain, it's free from the degradation and noise that occurs with analogue signal transmission.
Optical Digital Out
This allows you to connect a device to a digital surround sound processor so that you can take advantage of a movie with a Dolby Digital 5.1 or DTS 5.1 soundtrack. A thin fibre optic cable is needed to connect the two.
A speaker dedicated to producing powerful low frequency sounds - that's bass to you and me! DVDs with Dolby Digital 5.1 or DTS 5.1 soundtracks are encoded with a Low Frequency Effects channel especially for those trouser-flapping explosions, seismic spacecraft, rumbling thunderstorms, etc.
THX delivers cinema movie experiences with the stunning clarity and detail found in the filmmaker’s studio
A very popular connection port for transfering digital data inlcuding Images, music and movies.
Provides a surround sound effect while only using two front speakers. Normally found on televisions or All-in-one systems