An audio Channel in a Surround Sound system that's intended to be positioned behind the listener is considered a Rear Channel. Although modern Surround Sound formats use multiple Rear Channels, as did the early Quadraphonic Sound surround systems of the 1960s and 1970s, some formats like Dolby Surround and Dolby Pro Logic utilize only a single Rear Channel.
Rear Channel
Related glossary terms
5.1 Audio
7.1 Audio
AAC
AAC LC
AacPlus v2
AC-3 VS
AC3
AUDIO_TS
Dolby
Dolby Digital
Dolby Digital Plus
Dolby Pro Logic
Dolby Pro Logic II
Dolby Surround
Dolby TrueHD
Downmix
DTS
DTS-HD
DVD-Audio
DVD-Audio Zone
DVD-Video
DVD-Video Zone
Frequency
HE-AAC
LPCM
MP2
MP3
MP3+G
MPA
Muxing
Nyquist-Shannon Sampling Theorem
Surround Sound
