| Name | Description | Notes |
| Dolby Digital |
Mono, Stereo, 5.1-channel surround sound |
Discrete multichannel audio.
Virtually every DVD-Video player sold today offers a two-channel mixdown
of the Dolby Digital 5.1 movie soundtrack as well as a digital output for
5.1-channel. |
| Dolby Digital EX |
Add center rear channel to the 5.1 format |
Current Dolby Digital EX Soundtracks contain a digital flag that
can automatically activate the EX decoding. For titles released prior
to late 2001, however, you need to turn on the EX decoding manually. |
| Dolby Surround |
4 channels of audio (Left/Center/Right/Surround) |
Fully compatible for playback on mono and stereo systems |
| Dolby Pro Logic |
Decodes source audio encoded in two-channel Dolby Surround
for four-channel (Left/Center/Right/Surround) playback. |
Converts Dolby-encoded signal back to 4 channels.
3 full-range and limited-bandwidth for two surround speakers |
| Dolby Pro Logic II |
matrix decoding technology that expands any two-channel source audio
to a 5.1 full bandwidth (range) playback |
Converts the same Dolby Surround-encoded and stereo sources
to full-bandwidth surround channels |
| Dolby Pro Logic IIx |
Expands native two- and 5.1-channel source audio
for 6.1- or 7.1-channel playback |
Three listening modes: āMovie, Music or Game.
Music mode features three additional user controls:
- Dolby Center Width
- Dolby Panorama
- Dolby Dimension
|
| Dolby Stereo |
Original Dolby multichannel film sound format
for 35 mm prints and is encoded with four sound channels:
Left/Center/Right and Surround |
|
| Dolby SR |
Next advancement in analog film sound.
Improved dynamic range |
as a backup in case of problems with the digital track. |
| Dolby Digital Surround EX |
Add center rear channel matrix encoded onto
the regular left and right surround channels of 5.1 format |
Found In Motion Pictures |
| Name | Description | Notes |
| DTS Digital Surround |
5.1 channels of discrete digital audio. |
standart DTS |
| DTS-ES |
6.1 channels - DTS Extended Surround.
DTS 6.1 Matrix and DTS 6.1 Discrete decoding.
"ES" is the general term for DTS tracks with a center surround channel,
and "ES 6.1 discrete" is the particular case where the center surround
channel is discrete.
|
DTS-ES is also fully backwards-compatible with DTS decoders that
are not Extended Surround equipped.
The center surround channel is always matrixed into the LS and RS channels.
A discrete center surround channel can optionally be encoded.
On 5.1 center surround will be heard in and between the LS and RS speakers,
because the center surround channel information is matrixed into
the LS and RS channels.
|
| DTS Neo:6 |
Provides up to six channels of matrix decoding from
stereo matrix material. |
- Stereo matrix to 6.1 or 5.1 from stereo matrix material.
- ES - generate a center surround channel from 5.1 material.
- Natural sound field with precise localization.
- Music mode - expands stereo non-matrix recordings into 5.1 or 6.1
|
| DTS 96/24 |
"96" refers to a 96kHz sampling rate
(compared to typical 48kHz sampling rate.)
"24" refers to 24-bit word length. |
Fully backward-compatible with all DTS decoders. |
| DTS Virtual |
Down-converts DTS 5.1- or 6.1-channel soundtracks to stereo. |
For two-channel equipment such as headphones.
Simulate a surround sound experience. |
