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WM8944BECS/R bảng dữ liệu(PDF) 33 Page - Cirrus Logic

tên linh kiện WM8944BECS/R
Giải thích chi tiết về linh kiện  Mono Low-Power CODEC with Video Buffer
PDF  165 Pages
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nhà sản xuất  CIRRUS [Cirrus Logic]
Trang chủ  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8944BECS/R bảng dữ liệu(HTML) 33 Page - Cirrus Logic

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WM8944B
Rev 4.3
33
3D SURROUND
3D surround
5-notch filter
DF1 filter
L/HPF
Signal Enhancement Block 1 (SE1)
The 3D-stereo surround effect is part of the SE1 block. This function uses time delays and controlled
cross-talk mechanisms to adjust the depth or width of the stereo audio. The 3D-stereo surround effect
includes programmable high-pass or low-pass filtering to limit the 3D effect to specific frequency
bands if required. The structure of the 3D surround processing is illustrated in Figure 13.
HPF
LPF
bypass
HPF
LPF
bypass
z
-n
z
-n
+
+
L
R
forward_l
forward_r
cross_r
cross_l
Figure 13 3D Surround Processing
The 3D surround depth is programmable; the default setting is OFF. The 3D surround processing can
also be configured to create a mono mix of the Left and Right channels in the ADC path.
Note that the 3D surround processing can only be used with the stereo digital microphone in the ADC
path.
The 3D enhancement is enabled on the left and right channels using the SE1_3D_L_ENA and
SE1_3D_R_ENA register bits defined in Table 13. (Note that these bits can be enabled independently
of each other.)
The 3D enhancement coefficients are programmed in registers R68 to R70. For the derivation of
these registers, refer to the configuration tools supplied with the WM8944B Evaluation Kit.



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