8169 Datasheet, PDF (17/30 Pages) STMicroelectronics – DIGITAL AUDIO PROCESSOR WITH MULTICHANNEL DDX™

10.3 Coefficient map
Index
(decimal)
index (hex)
0
0h
20 LR filter coef.
1
1h
…
…
4
4h
5
5h
…
…
19
13h
20
14h
20 Surrounds
filter coef.
…
…
39
27h
40
28h
20 SBW filter
coef.
41
29h
42
2Ah
43
2bh
44
2Ch
45
2dh
…
…
59
3bh
60
3Ch
3 scale in factors
61
3dh
62
3Eh
63
3Fh
6 SBW
redirection
64
40h
factors
65
41h
66
42h
67
43h
68
44h
Filter coefficients:
CHx0 = b2
CHx1 = (b0)-1
CHx2 = a2
CHx3 = (a1)/2
CHx4 = (b1)/2
coefficient
LR00 (b2)
LR01 (b0-1)
…
LR04 (b1/2)
LR10 (b2)
…
LR34 (b1/2)
SUR00
…
SUR34
SBW00 (b2)
SBW01 (b0-1)
SBW02 (a2)
SBW03 (a1/2)
SBW04 (b1/2)
SBW10
…
SBW34
-scale_in LR
-scale_in SUR
-scale_in SBW
-scale_L→SBW
-scale_R→SBW
-scale_LS→SBW
-scale_RS→SBW
-scale_C→SBW
-scale_LFE→SBW
STA304A
default value
00000h
00000h
…
00000h
00000h
…
00000h
00000h
…
00000h
00032h
80032h
7C7EAh
81C6Fh
00032h
00000h
…
00000h
80000h
80000h
80000h
C0000h
C0000h
C0000h
C0000h
C0000h
80000h
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