參數(shù)資料
型號： CXD2721Q-1
廠商： Sony Corporation
元件分類： 數(shù)字信號處理
英文描述： Single-Chip Digital Signal Processor for Karaoke
中文描述： 單芯片數(shù)字信號處理器的卡拉OK
文件頁數(shù)： 36/70頁
文件大小： 941K
代理商： CXD2721Q-1
– 36 –
CXD2721Q-1
7-2-4. Surround (Karaoke Mode) Coefficient Settings
[Relevant coefficients] Tdoe (address = 6EH), Tdis (address = 8DH), TpL1 (address = 8EH),
TpL2 (address = 8FH), TpL3 (address = 90H), TpR1 (address = 91H),
TpR2 (address = 92H), TpR3 (address = 93H), Tdos (address = 94H)
(1) Karaoke Mode 0/1 Setting Values
The surround settings for Karaoke mode 0/1 are as follows.
Mode
Setting coefficient
SW1
SW2
Karaoke mode 0 (1/1 decimation)
Karaoke mode 1 (1/2 decimation)
Karaoke mode 1 (1/3 decimation)
0000H
0000H
0000H
0000H
8000H
8000H
SW3
—
0000H
8000H
Tdis
5000H
Tdoe
Tdoe – 0008H
Table 7-2-7. Surround Karaoke Mode 0/1 Setting Values
(2) Delay Amount Setting
The surround (Karaoke mode) delay amount can be varied by setting the coefficient Tdos (12 bits from D14 to
D3) value. However, the following restrictions apply according to the delay RAM assignment.
Karaoke mode 0: Tdis + Tdos
≤
7FF8H
Karaoke mode 1 (1/2 decimation): Tdis + Tdos
≤
7FF8H
Karaoke mode 1 (1/3 decimation): Tdis + Tdos
≤
7FF0H
The relationships between the coefficient and the delay amount are shown in Table 7-2-8.
Coefficients TpL1 to 3 (12 bits from D14 to D3) and TpR1 to 3 (12 bits from D14 to D3) are the sound initial
delay time. Set in the range of 0008H to Tdos.
Setting value Tdos
Delay (fs = 44.1kHz)
0008H
0010H
0018H
·
2FF8H
·
·
7FE8H
7FF0H
1535 steps 4094 steps
1/fs per step setting possible
0.022ms
·
·
·
34.807ms
2/fs per step setting possible
0.045ms
·
·
·
·
·
·
·
185.667ms
3/fs per step setting possible
0.068ms
·
·
·
·
·
·
·
278.503ms
Karaoke
mode 0
Karaoke
mode 1
Karaoke mode 0
1/2 decimation
1/3 decimation
Table 7-2-8. Surround Karaoke Mode Delay Amount Setting
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