参数资料
| 型号： | AC300030 |
| 厂商： | Microchip Technology |
| 文件页数： | 27/64页 |
| 文件大小： | 0K |
| 描述： | KIT ACOUSTIC ACCESSORY |
| 标准包装： | 1 |
| 附件类型： | 配件套件 |
| 适用于相关产品： | 杂讯抑制/回声消除库 |
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AEC Demonstration
3.2
AEC DEMONSTRATION FOR dsPIC33E DEVICE FAMILY
The following topics are covered in this section:
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3.2.1
Demonstration Summary
To demonstrate the functionality of the AEC library, a sample dsPIC33E-based
application emulating two speaker phones engaged in voice communication is
provided with the library. This software requires the use of two dsPIC33E USB Starter
Kits and two MEBs (not included with the software license), which are set up as shown
FIGURE 3-5:
ACOUSTIC ECHO CANCELLATION DEMONSTRATION
dsPIC33E USB Starter Kit and MEB
Running AEC Library
dsPIC33E USB Starter Kit and MEB
22
20
J5
dsPIC33E
DSC
22
J5
20
dsPIC33E
DSC
SW3
SW2
SW1
SW3
SW2
SW1
LED3 LED2 LED1
LED3 LED2 LED1
dsPIC33E USB Starter Kit
Board 1
R OUT
S IN
dsPIC33E USB Starter Kit
Board 2
S OUT
A speaker and a microphone are connected to board 1 and are located in proximity to
each other. A headset is connected to board 2.
When a person speaks into the headset connected to board 2, the speech signal is
sampled through the on-board WM8731 voice band codec and the DCI module of the
dsPIC DSC device. The dsPIC DSC device then transmits the compressed speech
signal through its UART2 module and the on-board I/O expansion connector to board 1.
The dsPIC DSC device on board 1 receives the signal through the on-board I/O
expansion connector and the device’s UART2 module. The dsPIC DSC device then
plays out the signal on the speaker through its DCI module and on-board WM8731
codec.
Due to the proximity of the speaker to the microphone, the sound from the speaker enters
the microphone and is sampled by the dsPIC DSC device through the codec. The device
then transmits the microphone signal to board 2 through the UART2 module. If a person
is speaking into the microphone connected to board 1, the signal transmitted to board 2
is a combination of the near-end speech and the undesirable acoustic echo of the far-end
? 2004-2011 Microchip Technology Inc.
DS70134F-page 27
相关PDF资料 |
PDF描述 |
|---|---|
| ACM-16 | CABLE MODULE FR3 16BIT 40-DIP |
| ACM-2X8 | ACTIVE CABLE MODULE DUAL 8 BIT |
| ACM-8 | CABLE MODULE FR3 8BIT 28/32-DIP |
| ACS9510EVB | EVALUATION BOARD FOR ACS9510 |
| ACS9550EVB | EVALUATION BOARD FOR ACS9550 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AC300031 | 制造商:Microchip Technology Inc 功能描述:ACOUSTIC ACCESSORY KIT SPEECH RECOGNITION - Boxed Product (Development Kits) 制造商:Microchip Technology Inc 功能描述:SPEECH RECOGNIZE KIT ACOUSTIC |
| AC3000-52 | 制造商:GE Energy (formerly Lineage Power) 功能描述:Front-End Power Supply 制造商:Lineage Power 功能描述:Front-End Power Supply |
| AC3000A | 制造商:Black Box Corporation 功能描述:HD VIEW TRANSMITTER |
| AC3000A-R2 | 制造商:Black Box Corporation 功能描述:HD VIEW TRANSMITTER |
| AC3000A-R2-W1 | 制造商:Black Box Corporation 功能描述:1 YEAR WARRANTY FOR AC3000A-R2 |
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