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Development Systems Ordering Guide
dsPIC30F Noise Suppression Library
The dsPIC30F Noise Suppression Library provides a
function to suppress the effect of noise interference
with a speech signal. This function is useful for
microphone-based applications, which have a potential
Noise
Suppression
for incoming speech corruption by ambient noise
captured by the microphone. It is especially suitable for
Noise
and Speech
User Application
Speech
systems in which an acoustically isolated noise
reference is not available, such as:
? Highly optimized Assembly code, utilizing DSC
instructions and advanced addressing modes
?
?
?
?
?
?
Hands-free Cell Phone Kits
Speakerphones
Intercoms
Teleconferencing Systems
Headsets
As a front-end to a Speech Recognition system
(e.g., SW300010)
? Audio Bandwidth: 0-4 kHz at 8 kHz sampling rate
? 10-20 dB noise reduction, depending on the type of
noise:
- Several speech recordings corrupted by
Babble, Car Cabin, White and Narrowband
Noise included for library evaluation
? Source code is provided with the library
? Any microphone-based application that needs to
eliminate undesired noise
Features
? Only 2 user functions (“ NoiseSuppressionInit ”
and “ NoiseSuppression ”), both of which can be
called from either a ‘C’ or Assembly application
program
? Full compliance with the Microchip dsPIC30F C30
Compiler, Assembler and Linker
? Simple user interface – just one library file and one
? “dsPIC30F Noise Suppression Library User ’s Guide”
is provided to help the user understand and use the
library
? Demo application source code is provided with the
library
? Accessory Kit available for purchase includes: an
audio cable, headset, oscillators, microphone,
speaker, DB9 M/F RS-232 cable, DB9M-DB9M null
modem adapter and can be used for library
evaluation
Contact Microchip sales for FREE evaluation samples.
header file
Ordering Information:
SW300040-EVAL dsPIC30F Noise Suppression Library Software License (Evaluation Copy)
SW300040-5K
SW300040-25K
dsPIC30F Noise Suppression Library Software License (Up to 5K units)
dsPIC30F Noise Suppression Library Software License (5K to 25K units)
SW300040-100K dsPIC30F Noise Suppression Library Software License (25K to 100K units)
AC300030
DS70124
DS30177T-page 16
Accessory Kit (includes: audio cable, headset, oscillators, microphone, speaker,
M/F RS-232 cable, DB9M-DB9M Null Modem Adapter)
“dsPIC30F Noise Suppression Library Product Overview” (Available at: www.microchip.com)
? 2005 Microchip Technology Inc.
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