DM300027 Microchip Technology, DM300027 Datasheet - Page 9

• Manufacturer Part Number: DM300027
• Description: BOARD DEV STARTER PIC24 28-PIN
• Manufacturer: Microchip Technology
• Type: MCUr

Specifications of DM300027

• Contents: Board, Cables, CD, Sample Part
• Processor To Be Evaluated: dsPIC30F/PIC24F/dsPIC33F
• Data Bus Width: 16 bit
• Interface Type: USB
• Silicon Manufacturer: Microchip
• Core Architecture: PIC, DsPIC
• Core Sub-architecture: PIC24, DsPIC30, DsPIC33
• Silicon Core Number: PIC24F, DsPIC30F, DsPIC33F
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: dsPIC30F/33F and PIC24
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Summary
The dsPIC® DSC Line Echo Cancellation (LEC) Library is
compatible with the ITU-T G.168 standard. It provides a
function to eliminate echo generated in telephone or digital
network components. LEC library functions can be used to
eliminate far-end as well as near-end echo.
Key Features
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Summary
The dsPIC® DSC Equalizer Library provides functionality to
adjust the spectral characteristics of a voice band signal.
The equalizer library enables compensation for the changes
in total properties of the voice signal resulting because of
signal processing and mechanical limitations of Input-Output
devices. Equalizer library enables user to modify the spectral
characteristics of the signal.
Key Features
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dsPIC® DSC Line Echo Cancellation Library
Line echo cancellation for 16, 32, 64 or 128 ms echo
delays
Audio bandwidth: 0 to 4 kHz at 8 kHz sampling rate
Convergence Rate: Up to 60 dB/sec., typically greater
than 30 dB/sec
Can be used together with the Noise Suppression (NS)
Library
Can be instantiated multiple times to support multiple
input audio streams
Line echo cancellation adaptation can be force-enabled or
disabled by the user application
Tone detection for disabling LEC during test or
measurement processes
Run-time control of key algorithm parameters is provided
Supported by Microchip SAFF Tool
Audio bandwidth sampling rate at 8 KHz
Quality factor of 1.4 for each band-pass filter
Individual band gain control from 0-18 dB
Master gain control from 0-12 dB
Can be integrated with the dsPIC DSC Noise Suppression,
Acoustic Echo Cancellation and Line Echo Cancellation
libraries
Can process multiple audio streams
Simple user interface – only one library file and one
header file
Supported by Microchip SAFF Tool
dsPIC® DSC Equalizer Library
Applications
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Applications
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Hands-free cell phone kits
Speaker phones
Intercoms
Teleconferencing systems
Voice over internet protocol
Hands-free cell phone kits
Speaker phones
Intercoms
Teleconferencing systems
www.microchip.com/16bit • www.microchip.com/32bit
(SW300080)
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