AC3 (also called DD, discrete stereo, stereo with matrixed 5.1, discrete 5.1, up to 448 KB/s, 16-20 bit, 48 KHz)
DD: EX (5.1 with matrixed 6.1 or 7.1, up to 448 KB/s, 16-20 bit, 48 KHz)
LPCM (discrete stereo only, 1.5 Mb/s, 16 bit, 48 KHz)
DTS (discrete 5.1, 1.5 Mb/s, 16-20 bit, 48KHz)
DTS: ES (5.1 with matrixed 6.1 or discrete 6.1, 1.75 Mb/s, 16-20 bit, 48 KHz)
DTS 96:24 (discrete 5.1, 2.0 Mb/s, 24 bit, 96 KHz)
Primary can only be LPCM or AC3. Anything else must be added as a secondary track.
DTS: ES and DTS 96:24 require optical TOSlink. Everything else can bitstream through coaxial TOSlink (spdif). With matrix encoding you get a virtual surround sound effect on stereo systems and with the proper decoder a significantly better surround sound experience on a surround sound system than regular upmixed stereo tracks. It is known to cause voices to become muffled in comparison to sound effects when played back on stereo systems.
Up to three primary tracks (different languages) using the above DVD standards
DD+ (contains stereo discrete, 5.1 discrete, 7.1 discrete, up to 5 Mb/s, 24 bit, 96 KHz)
DTS-HD: HR (contains stereo discrete, 5.1 discrete, 7.1 discrete, up to 8.5 Mb/s, 24 bit, 96 KHz)
D-THD (contains stereo discrete, 5.1 discrete, 7.1 discrete, up to 18 Mb/s, 24 bit, 192 KHz)
DTS-HD: MSTR (contains stereo discrete, 5.1 discrete, 7.1 discrete, up to 18 Mb/s, 24 bit, 192 KHz)
Alternate center channel tracks are provided for different languages. Secondary audio tracks require HDMI audio.
DD Decoder: Decodes stereo or 5.1 AC3 audio tracks into stereo/5.1 16 bit 48KHz LPCM. Can downmix channels by simply mixing them together.
DD+ Decoder: Decodes DD+ to stereo/5.1/7.1 24 bit 96KHz LPCM. Does not need to downmix due to the unique encoding method.
D-THD Decoder: Decodes D-THD to stereo/5.1/7.1 24 bit 192KHz LPCM. Does not need to downmix due to the unique encoding method.
Dolby Pro-logic: Analog encoder and decoder. Uses matrix encoding to encode a 3 channel source (FL, FR, surround) into stereo. Used by movie theaters in the 70s and 80s.
Dolby Surround: Encoder and decoder. Analog. Uses matrix encoding to encode a 4.0 source (FL, FC, FR, Surround) as stereo. Used in some VHS movies and some TV stations in the 90s as well as movie theaters in the 80s.
Dolby Surround EX: Encoder. Takes a 6.1 or 7.1 source and uses matrix encoding to fold it into 5.1. Designed for prologic II. Creates a DD: EX track.
Dolby Pro-Logic II: Decoder. Decodes matrixed 5.1. Upmixes discrete stereo to 5.1. Designed for 5.1 setups. Can use LPCM, DD, or DTS as source.
Dolby Pro-Logic IIx: Second layer. Decodes matrixed 6.1/7.1. Upmixes 5.1 to 6.1/7.1. Upmixes 6.1 to 7.1. Designed for 6.1/7.1 setups.
Dolby Pro-logic IIz: Alternate second layer. Unfolds a matrixed 5.1 track to 6.1 or 7.1. Upmixes 5.1 to 6.1/7.1/9.1. Upmixes 6.1/7.1 to
9.1. Designed for 9.1 setups or 7.1 setups with height speakers.
Dolby Headphone: Similar to virtual speaker, but for headphones
Dolby Live: Encodes a AC3 or DD: EX stream in real time from an LPCM or DTS source (does not support the HD codecs yet)
Dolby Virtual Speaker: Multiband phase shifter that creates a virtual surround sound experience on a stereo system
Dolby Volume: Maintains constant volume level
Theaters use discrete 7, 6, or 5 channel analog tracks.
DTS Decoder: Decodes DTS tracks to stereo/5.1/6.1 16 bit 48KHz LPCM. Downmixes 6.1 to
5.1 or stereo. Downmixes 5.1 to
DTS 96:24 Decoder: Decodes DTS 96:24 tracks to 5.1 24 bit 96KHz LPCM. Downmixes 5.1 to stereo.
DTS-HD Decoder: Decodes DTS-HD tracks to stereo/5.1/7.1 24 bit 96/192KHz LPCM. No downmixing is needed.
DTS Neo:6: Decodes matrixed 6.1 tracks. Upmixes stereo to 5.1 or 6.1. Upmixes 5.1 to 6.1. Equivalent of Dolby Prologic II.
DTS Surround Sensation: Equivalent of Dolby virtual speaker and Dolby headphone. Multiband phase shifter that creates a virtual surround sound experience on a stereo system.
DTS Connect: Refers to the combination of DTS interactive and DTS Neo:PC.
DTS Interactive: Real time stream encoder that encodes DD and LPCM to DTS/DTS: ES (does not support DTS 96:24 or the HD codecs). Equivalent of dolby live.
DTS Neo:PC (software): Similar to DTS Neo:6 but can also upmix content to 7.1. Can also downmix. Equivalent of Dolby Prologic IIx.
DTS Neural Surround: A method of encoding a track within a track within a track. Used for the HD codecs. Allows the sounds to sound natural on any system whether it be stereo, 5.1, 6.1, 7.1, or even 9.1+. Dolby has a similar method for their HD codecs.
DTS Neural Upmix (hardware): Upmixes stereo to 5.1/6.1/7.1. Upmixes 5.1 to 6.1/7.1. Upmixes 6.1 to 7.1. Works with DTS, DD, and LPCM sources. Equivalent of Dolby Prologic IIx. Difference between this and Neo:PC is that this is implemented through hardware instead of software (receivers instead of a PC).
DTS Neural Downmix: Downmixes 7.1 to 6.1/5.1/stereo. Downmixes 6.1 to 5.1/stereo. Downmixes 5.1 to stereo. Works with DTS, DD, and LPCM sources.
DTS Neural Loudness Control: Equivalent of dolby volume. Maintains a consistent volume level.
DTS Neo:X: Still in prototype. Not commonly adopted yet even in high end receivers. Upmixing up to 11.1, possibly higher.
MultiEQ: Room calibration.
Audyssey EQ: Room calibration.
Dynamic EQ: Loudness correction. Makes things audible at low volumes.
Dynamic Volume: Maintains a consistent volume level.
Dynamic Volume TV: Dynamic Volume optimized for TV.
Volume Extension: Reduces perceived distortion from turning up weak speakers too high. DTS has an equivalent for this but I can't remember the name.
Audyssey DSX: Decoder for LPCM, DD, and DTS formats. Upmixes 5.1 content to 7.1/9.1/11.1.
BassXT: Boosts bass output.
ABX: Better bass from small speakers.
Audyssey LFC: Prevents low frequencies from traveling through walls without getting rid of them.