Appendix B • Reference Material; Source Formats; Surround Channel Information - Extron electronics SSP 7.1 User Manual

Reference Material

Source Formats

Surround Channel Information

Surround channel information is written in the following format:
A/B.C (For example 3/2.1)
A represents the number of front channels (maximum 3: Front Right, Front Left,
and Center). If A is 1, the source format has a mono encoded signal for playback
through the center channel. If A is 2, the source format encodes two discrete
channels for stereo playback through the front right and front left channels. If A is
3, there is a discrete encoded signal for all three front speakers.
B represents the number of side channels (maximum 3: Surround Right, Surround
Left, and Surround Back). If B is 1, the source format has a mono encoded signal
for playback as dual mono through the surround right and surround left channels.
If B is 2, the source format encodes two discrete channels for stereo playback
through the surround right and surround left channels. If B is 3, there is a discrete
encoded signal for all three speakers, including the back speaker.
N There is no "4" option because, while the SSP 7.1 can output up to eight full
C represents the presence or absence of LFE (1 = present; 0 = none or absent). This
is the discrete bass information, normally designated for use with the subwoofer
channel, but may be mixed with other channels in the absence of a subwoofer.
1/0.0 or 2/0.0
1/0.1 or 2/0.1
2/1.0
2/1.1
2/2.0
2/2.1
2/3.0
2/3.1
3/0.0
3/0.1
3/1.0
3/1.1
3/2.0
3/2.1
3/3.0
3/3.1
N The minimum allowable configuration of the SSP 7.1 is 2.0 because the left and
B-2 SSP 7.1 • Reference Material
bandwidth channels, there are presently no source formats that can pass digital
bit stream audio information containing 7.1 discrete encoded channels through
S/PDIF connections, which only the SSP 7.1 supports.
Encoded Channels
right front speakers are always on. In the absence of a center channel, 1/0.0 and
1/0.1 encoded channels are output equally to both front channels.
Minimum Required Output
Speaker Configuration
2.0
2.1
5.0
5.1
5.0
5.1
6.0
6.1
3.0
3.1
5.0
5.1
5.0
5.1
6.0
6.1