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CXD2724AQ-1 Datasheet(PDF) 44 Page - Sony Corporation

Part No. CXD2724AQ-1
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-1 Datasheet(HTML) 44 Page - Sony Corporation

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CXD2724AQ-1
(3) Volume Coefficient Settings
[Relevant data] Coefficients: attV (f1H), KL (f2H), KR (f3H), KCP (f7H), KS (f8H)
Adjust the levels of the two Virtual mode channels by the amount of the four Pro Logic decoder output
channels using KL (f2H), KR (f3H), KCP (f7H) and KS (f8H). (See Table 8-1-7.)
The mixing level of the surround channel can be adjusted
with coefficient attV (f1H).
attV can be set in the range of 7fffH to 0000H as shown in
Table 8-2-3.
The I/O levels for 7fffH to 0001H are obtained by the
following formulas.
(Coefficient value) = [D15 +
∑ (Dn × 2n – 15)] × 2
I/O level = 20 log [coefficient value] dB
Also, the most effective listening area is shown in Fig. 8-2-3.
7fffH
5a67H
3fffH
2d4eH
2000H
1000H
0001H
0000H
Coefficient value
+6.02
+3.00
0.00
–3.00
–6.02
–12.04
–84.29
Level [dB]
14
n = 0
∗ Sony recommended value: 5333H (+2.28dB)
Table 8-2-3. attV (f1H) Setting Value Examples
–KCP (f7H)
–KS (f8H)
Lt
L
R
C
S
Rt
Pro
Logic
Decoder
Virtual
Surround
Process
Mixing
–KL (f2H)
–KR (f3H)
attV (f1H)
attV (f1H)
L
R
C
VL
VR
L
R
Lt
Rt
Lout
Rout
S
S
L
C
R
Lch
Rch
1.2 to 2.0m
Phantom
center
44°
Virtual
surround
Virtual
surround
Listening center
Fig. 8-2-2. Volume Setting Coefficients
Fig. 8-2-3. Listening Area


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