ml7074-003 Oki Semiconductor, ml7074-003 Datasheet - Page 44

• Manufacturer Part Number: ml7074-003
• Description: Dual Echo Canceler & Noise Canceler With Dual Codec For Hands-free Msm7731-02dual Echo Canceler & Noise Canceler With Dual Codec For Hands-free
• Manufacturer: Oki Semiconductor

Noise Attenuation
There is a trade-off between noise attenuation and sound quality. In other words, increasing the noise attenuation
deteriorates sound quality, and decreasing the noise attenuation improves sound quality. The following
combinations of noise attenuation levels can be selected with this device. Select the noise attenuation appropriate
to the sound quality.
When selecting the following combinations by the method of internal data memory access, set the
NCSEL1/NCSEL2 pin and bit as follows:
OKI Semiconductor
Noise attenuation [dB]
17 (default)
address
NCSEL1 pin and bit (CR1-B0) = 0
NCSEL2 pin and bit (CR12-B2) = 0
13.5
14
12
11
10
10
9
8
8
8
7
7
6
6CCCh
Data 1
01C8h
2000h
3333h
3333h
4666h
4666h
5999h
6666h
5999h
2000h
3333h
4666h
5999h
6666h
Data 2
01C2h
0005h
0005h
0004h
0005h
0003h
0005h
0005h
0005h
0002h
0001h
0001h
0001h
0001h
0001h
Voice quality
Better
Best
FEDL7731-02-11
MSM7731-02
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