參數(shù)資料
型號: CXD2724AQ-3
廠商: Sony Corporation
英文描述: Single-Chip Dolby Pro Logic Surround Decoder(單片杜比環(huán)繞邏輯譯碼器)
中文描述: 單片杜比定向邏輯環(huán)繞聲解碼器(單片杜比環(huán)繞邏輯譯碼器)
文件頁數(shù): 34/65頁
文件大?。?/td> 490K
代理商: CXD2724AQ-3
– 34 –
CXD2724AQ-3
(5) Center Mode Control
[Relevant data] Coefficients: KP (f5H), KH (f4h), KL (f2H), KR (f3H), KCP (f7H), KCH (f6H)
The center channel output mode can be set to Normal, Wide or Phantom mode as shown in Table 8-1-7 below.
Coefficient
Normal
KP (f5H)
e000H
0000H
e000H
KH (f4H)
e000H
0000H
0000H
KL (f2H)
d2cdH
d2cdH
d2cdH
KR (f3H)
d2cdH
d2cdH
d2cdH
KCP (f7H)
0000H
e000H
0000H
KCH (f6H)
e000H
0000H
0000H
Mode
Wide
Phantom
Table 8-1-7. Center Mode Control Setting Value Examples
LP
RP
CP
–KL (f2H)
–KR (f3H)
LO
RO
CO
LPF
HPF
–KCH (f6H)
–KCP (f7H)
Note) If KH is set to 0000H in Phantom center channel mode, the LPF is set to
data through status and the data added to the L and R channels is CP
×
KP.
–KH (f4H), –KP (f5H)
Fig. 8-1-2. Signal Flow for Center Mode Control (L, R, C-ch)
Note)
In Phantom center channel mode, the center channel information is divided equally between the left and
right speakers.
8000H
c000H
d2cdH
e000H
e959H
eff6H
f7f6H
ffffH
0000H
D15 to D0
+12.04
+6.02
+3.00
0
–3.00
–6.00
–12.00
–78.27
Level [dB]
Table 8-1-8. KP, KH, KL, KR, KCP, KCH and KS
Setting Value Examples
The level of each channel can be adjusted by changing
the KP, KH, KL, KR, KCP and KCH setting values. In
these cases, be sure to change only the shaded portions
for each mode in Table 8-1-7.
However, make sure that KP = KH in Normal mode. In
Phantom mode, set KH to 0000H and adjust the mix level
to the left and right channels using KP.
The I/O levels for 8000H to ffffH are obtained by the
following formulas.
(Coefficient value) = [(–1)
×
D15 +
(Dn
×
2
n – 15
)]
×
(–4)
I/O level = 20 log [coefficient value] dB
14
n = 0
In Table 8-1-7, lowering the input level by 3dB using Kia (dcH) or Kis (ddH) raises the output level of the L
and R channels by 3dB. In this case, attaching external parts as shown in the Application Circuit is
recommended to increase the C and S channel gains.
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