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CXD2724AQ-3 Datasheet(PDF) 33 Page - Sony Corporation

Part No. CXD2724AQ-3
Description  Single-Chip Dolby Pro Logic Surround Decoder
Download  65 Pages
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Manufacturer  SONY [Sony Corporation]
Direct Link  http://www.sony.co.jp
Logo SONY - Sony Corporation

CXD2724AQ-3 Datasheet(HTML) 33 Page - Sony Corporation

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CXD2724AQ-3
(3) Volume Coefficient Settings
[Relevant data] Coefficients: KiA (d6H), Kia (dcH), Kis (ddH)
The I/O levels and volumes are 2's complement format with a decimal point between D15 and D14, and
hexadecimal notation with D15 as MSB and D0 as LSB.
The coefficient and level relationships are as follows.
∗ D15 to D0 are negative values, but the DSP calculation is (–1) × (D15 to D0).
(3)-1. Kia (dcH): 0dB = c000H
The I/O levels for 8000H to ffffH are obtained by the following formulas.
(Coefficient value) = [(–1)
× D15 + ∑ (Dn × 2n – 15)] × (–2)
I/O level = 20 log [coefficient value] dB
(3)-2. KiA (d6H), Kis (ddH): 0dB = 8000H
The I/O levels for 8000H to ffffH are obtained by the following formulas.
(Coefficient value) = [(–1)
× D15 + ∑ (Dn × 2n – 15)] × (–1)
I/O level = 20 log [coefficient value] dB
∗ Unless otherwise specified, subsequent setting examples (Pro Logic mode) in these specifications assume
either:
Kia = d2b2H, KiA = 0000H, Kis = 0000H
or:
Kia = 0000H, KiA = 8000H, Kis = a563H
(4) Auto Input Balance Control
[Relevant data] Coefficient: Kx (d4H)
The auto input balance function is turned on and off by coefficient Kx (d4H).
8000H
a599H
c000H
d2b2H
e000H
eff6H
ffffH
0000H
D15 to D0
+6.02
+3.00
0.00
–3.00
–6.02
–12.00
–84.29
Level [dB]
8000H
a563H
c000H
e000H
ffffH
0000H
D15 to D0
0.00
–3.00
–6.02
–12.04
–90.31
Level [dB]
14
n = 0
14
n = 0
Table 8-1-4. Kia (dcH) Setting Value Examples
Table 8-1-5. KiA (d6H), Kis (ddH) Setting Value Examples
Coefficient
Kx (d4H)
OFF = 0000H
ON = 00ffH
Table 8-1-6. Auto Input Balance ON/OFF


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