From Wikipedia, the free encyclopedia
In sound recording, a matrix can refer to a disc in the early stages of processing a record for mass production; see mastering and pressing process discussion at gramophone record. Matrix can also refer to the encoding of several channels of audio into fewer channels to be decoded back into several channels later.
[edit] SQ Matrix ("Surround Quadraphonic", "Stereo Quadraphonic", CBS SQ)
| Encoding Matrix |
Left Front |
Right Front |
Left Back |
Right Back |
| Left Total |
1.0 |
0.0 |
j0.7 |
k0.7 |
| Right Total |
0.0 |
1.0 |
k0.7 |
j0.7 |
j = + 90º phase-shift , k = - 90º phase-shift
[edit] QS Matrix ("Quadraphonic Stereo", QS)
| Encoding Matrix |
Left Front |
Right Front |
Left Back |
Right Back |
| Left Total |
0.92 |
0.38 |
j0.92 |
j0.38 |
| Right Total |
0.38 |
0.92 |
k0.38 |
k0.92 |
j = + 90º phase-shift , k = - 90º phase-shift
[edit] Ambisonics UHJ coding matrix
| Encoding Matrix |
X (front-back information) |
W (pressure signal) |
Y (left-right information) |
| Left Total |
0.093 + j0.255 |
0.470 + k0.171 |
+0.328 |
| Right Total |
0.093 + k0.255 |
0.470 + j0.171 |
-0.328 |
j = + 90º phase-shift , k = - 90º phase-shift
[edit] Dolby Surround Matrix
| Encoding Matrix |
Left |
Right |
Center |
Surround |
| Left Total |
1.000 |
0.000 |
0.707 |
j0.707 |
| Right Total |
0.000 |
1.000 |
0.707 |
k0.707 |
j = + 90º phase-shift , k = - 90º phase-shift
[edit] Dolby Pro Logic Matrix
| Encoding Matrix |
Left |
Right |
Center |
Rear Left |
Rear Right |
| Left Total |
1.000 |
0.000 |
0.707 |
j0.707 |
j0.707 |
| Right Total |
0.000 |
1.000 |
0.707 |
k0.707 |
k0.707 |
j = + 90º phase-shift , k = - 90º phase-shift
[edit] Dolby Pro Logic II Matrix
| Encoding Matrix |
Left |
Right |
Center |
Rear Left |
Rear Right |
| Left Total |
1.000 |
0.000 |
0.707 |
j0.8165 |
j0.5774 |
| Right Total |
0.000 |
1.000 |
0.707 |
k0.5774 |
k0.8165 |
j = + 90º phase-shift , k = - 90º phase-shift
[edit] See also
