參數(shù)資料
型號(hào)： MSM7731-01
廠商： OKI SEMICONDUCTOR CO., LTD.
元件分類： Codec
英文描述： Multifunction PCM CODEC (Voice Signal Processor)
中文描述： 多功能的PCM編解碼器（語(yǔ)音信號(hào)處理器）
文件頁(yè)數(shù)： 34/43頁(yè)
文件大?。?/td> 247K
代理商： MSM7731-01
34/43
Semiconductor
MSM7731-01
(6) CR5 (Acoustic echo canceler settings)
B7.......... "Through mode" control 1: "through mode", 0: normal mode (echo cnaceler operation)
This is the "through mode" control bit for the acoustic echo canceler. In the
"through mode", RinA and SinA data is output directly to RoutA and SoutA
respectively. Coefficients are not reset.
This bit is internally ORed with the ATHR pin.
B6, B5 ... Reserved bits
B4.......... Howling detector control
This bit controls the function to detect and cancel the howling that occurs in an
acoustic system such as a handsfree communication system.
This bit is internally ORed with the
AHD
pin.
B3.......... Center clip control
When the SoutA output of the acoustic echo canceler is –57 dBm0 or less, the
center clip function forcibly sets it to the minimum positive value.
B2.......... Coefficient update control
This bit selects whether the adaptive FIR filter (AFR) coefficients for the
acoustic echo canceler will be updated.
This bit is internally ORed with the AHLD pin.
B1.......... Attenuator control
This bit turns ON or OFF the ATT function to prevent howling by means of
attenuators (ATTsA, ATTrA) provided in the RinA input and SoutA output of
the acoustic echo canceler.
If input is only to RinA, the ATT for SoutA (ATTsA) is activated. If input is only
to SinA, or if there is input to both SinA and RinA, the ATT for RinA input
(ATTrA) is activated. The ATT value of each attenuator is approximately 6 dB.
This bit is internally ORed with the
AATT
pin.
B0.......... Gain controller
This bit turns ON or OFF the gain control function to control the RinA input
level and prevent howling by means of a gain controller (GainA) provided in
the RinA input of the acoustic echo canceler.
The gain controller adjusts the RIN input level when it is –10 dBm0 or above,
and it has the control range of 0 to –8.5 dB.
This bit is internally ORed with the
AGC
pin.
Modification of initial values is inhibited
1: OFF,
0: ON
1: ON,
0: OFF
1: fixed coefficients,
0: updated coefficients
1: ATT OFF,
0: ATT ON
1: GC OFF,
0: GC ON
B7
ATHR
0
B6
—
0
B5
—
0
B4
AHD
0
B3
ACLP
0
B2
AHLD
0
B1
AATT
0
B0
AGC
0
CR5
Initial value
相關(guān)PDF資料
PDF描述
MSM7731-02 Dual Echo Canceler & Noise Canceler with Dual Codec for Hands-Free
MSM80C154S CMOS 8-bit Microcontroller
MSM83C154S Electrical, Duct/Raceway (Trunking);
MSM80C31 CMOS 8-Bit Microcontroller
MSM80C40 CMOS 8-Bit Microcontroller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MSM7731-02 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Dual Echo Canceler & Noise Canceler with Dual Codec for Hands-Free
MSM7731-02GAZ020 制造商:ROHM Semiconductor 功能描述:
MSM7731-02GAZ03A 制造商:ROHM Semiconductor 功能描述:
MSM7731-02GAZ03A-7 制造商:ROHM Semiconductor 功能描述:
MSM7731-02GAZ03B-7 制造商:ROHM Semiconductor 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*