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CXD2724AQ-1 Datasheet(PDF) 39 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) 39 Page - Sony Corporation

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CXD2724AQ-1
(7)-2. Delay Line Settings
[Relevant data] Coefficients: KDin (19H), TP1 (1aH), TP2 (1bH), TP3 (1cH), TP4 (1dH), TP5 (1eH),
TP6 (1fH), KDout (20H)
The Pro Logic mode delay lines are used for both the passive decoder short delay and the simple SFC
reverberation, and are thus subject to the following restrictions:
• Dly + 0020H
≤ KDin (0020H ≤ Dly ≤ KDin – 0020H)
• 0020H
≤ TP∗ ≤ KDout
• KDin + KDout
≤ bfe0H
Dly (fbH): Pro Logic delay line read address
KDin (19H): Simple SFC delay line write address
TP1 to TP6 (1aH to 1fH): Simple SFC tap read addresses (determine the delay time for each tap)
KDout (20H): Simple SFC feedback loop read address (determines the maximum delay time)
Note) The minimum unit for all the above coefficients is "0020H". Values smaller than this are ignored.
0020H
0040H
·
·
1a60H
·
35f0H
·
5180H
·
6d10H
·
·
bf80H
bfa0H
Setting value
KDout, TP1 to TP6
0.022ms
0.045ms
·
·
4.784ms
·
9.784ms
·
14.784ms
·
19.784ms
·
·
34.739ms
34.762ms
Delay
(fs = 44.1kHz)
The TP1 to TP6 and KDout addresses are specified in a different
manner than Dly and KDin. These addresses are specified by the
address value assuming KDin as the reference (= 0000H).
That is to say, the actual address is KDin + KDout, etc.
The coefficient values are calculated as follows.
(Dly) Decimal = (Delay [s])
× fs [Hz] × 32
Example) When using 20ms for the passive decoder, and all
remaining delay lines as reverberation
20ms
→ Dly = 6e40H
KDin = 6e40H + 0020H = 6e60H
KDout = bfe0H – 6e60H = 5180H
0020H
≤ TP1 to 6 ≤ 5180H
Table 8-1-15. Simple SFC Delay Time Setting
Value Examples
0000H
20.0ms
14.8ms
6e40H
6e60H
5180H
Passive decoder
Simple SFC
Dly
KDin
KDout
34.8ms (0000H to bfe0H)
Fig. 8-1-5. Pro Logic Mode Delay Line Setting Example


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