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參數(shù)資料
| 型號： | UPC1857ACT |
| 廠商： | NEC Corp. |
| 英文描述： | SOUND CONTROL IC WITH SURROUND AND I2C BUS |
| 中文描述： | 聲控集成電路環(huán)繞和I2C總線 |
| 文件頁數(shù)： | 22/44頁 |
| 文件大?。?/td> | 343K |
| 代理商： | UPC1857ACT |
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22
μ
PC1857A
4.4.3
Surround mode
The following surround modes can be selected by using data of bits D3 and D2 of subaddress 00H.
Simulated : Simulated stereo sound for monaural source. The difference between the signal that has gone
through HPF and the signal that has gone through LPF is calculated, and the phase of the
difference is shifted and added to the original signal. The simulated stereo effect is created if the
output frequency characteristics of the L-channel and R-channel signals is comb-shaped.
Music
: Surround sound for stereo source. The phase of the differential signal between L and R channels
(L-R signal) is rotated by a phase shifter (1-unit), and is added to the original signal.
Movie
: Surround sound for stereo source. The phase of the differential signal between L and R channels
(L-R signal) is rotated by a phase shifter (4-unit), and is added to the original signal.
OFF
: Original signal as is.
Figure 4-3. Surround Mode
D7
D6
D5
D4
D3
D2
D1
D0
Subaddress
00H
Mute
Output selection
0
Mode
Data
Surround mode
D3
0
0
1
1
Surround mode
Surround effect
D2
0
1
0
1
Simulated
Music
Movie
OFF
Caution The surround mode is OFF (D3, D2 = 11) if the stereo mode is not selected by the output
selection bits (D5, D4 = 00).
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