|
Surround format
|
Number of
channels
|
Types of channels
|
Type of media with which the format may be used
|
|
Dolby® Pro Logic®
|
4
|
- 2 discrete, full-bandwidth channels (front left and right)
- 1 matrixed, full-bandwidth channel (center)
- 1 matrixed, limited-bandwidth channel (surround left and right)
|
- stereo and Dolby Surround-encoded VHS movies and broadcast TV programs
- can be downconverted from any Dolby Digital source
|
|
Dolby Pro Logic II
|
5.1
|
- 2 discrete, full-bandwidth channels (front left and right)
- 3 matrixed, full-bandwidth channels (center, surround left and right)
- 1 subwoofer channel via Pro Logic II's bass management
|
- stereo and Dolby Surround-encoded VHS movies and broadcast TV programs
- stereo music
- video games
|
|
Dolby Digital
|
up to
5.1
|
- 5 discrete, full-bandwidth channels (front left and right, center, surround left and right)
- 1 discrete LFE channel (subwoofer)
|
- all DVDs
- some broadcast HDTV
- some DBS
|
|
DTS®
|
5.1
|
- 5 discrete, full-bandwidth channels (front left and right, center, surround left and right)
- 1 discrete LFE channel (subwoofer)
|
- some DVDs are DTS-encoded
- some CDs are DTS-encoded
|
|
Dolby Pro Logic IIx
|
6.1
|
- 2 discrete, full-bandwidth channels (front left and right)
- 4 matrixed, full-bandwidth channels (center, surround left and right, and back surround)
- 1 subwoofer channel via Pro Logic IIx's bass management
|
- stereo and Dolby Surround-encoded VHS movies and broadcast TV programs
- stereo music
- video games
|
|
Dolby Digital EX
|
6.1
|
- 5 discrete, full-bandwidth channels (front left and right, center, surround left and right)
- 1 matrixed, full-bandwidth channel (back surround)
- 1 discrete LFE channel (subwoofer)
|
- some DVDs are Dolby Digital EX-encoded
- regular Dolby Digital 5.1 DVDs can also be used with a Dolby Digital EX decoder
|
|
THX Surround EX™
|
6.1
|
- 5 discrete, full-bandwidth channels (front left and right, center, surround left and right)
- 1 matrixed, full-bandwidth channel (back surround)
- 1 discrete LFE channel (subwoofer)
|
- can decode any Dolby Digital or Dolby Digital EX source
- can be used to enhance Pro Logic, Pro Logic II, DTS, or DTS-ES decoding
|
|
DTS-ES™
|
6.1
|
- 6 discrete, full-bandwidth channels (front left and right, center, surround left and right, and back surround)
- 1 discrete LFE channel (subwoofer)
|
- some DVDs are DTS-ES-encoded
- regular DTS 5.1 DVDs can also be used with a DTS-ES decoder
|
