Table of Home Theater Surround Sound Formats

Surround format Number of
Channels
Types of channels Type of media
the format can
be found on
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) VHS movies, broadcast TV, 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 all the same Dolby Surround sources as Pro Logic (VHS movies, broadcast TV), as well as stereo music
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, and 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 and CDs (limited number specifically labeled with DTS encoded sound)
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) a handful of DVDs are THX Surround EX-encoded; regular Dolby Digital 5.1 DVDs can also be used with a THX Surround EX decoder
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)
a few DVDs