DM300027 Microchip Technology, DM300027 Datasheet - Page 7

• 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

dsPIC® DSC Noise Suppression Library
Summary
The dsPIC® DSC Noise Suppression Library provides a func-
tion to suppress the effect of noise in a speech signal.
This function is useful for microphone-based applications
that have a potential for incoming speech corruption from
ambient noise. It is especially suitable for systems where
an acoustically isolated noise reference is not available.
The noise suppression library removes noise from a 10 ms
block of 16-bit speech data sampled at 8 kHz. Fast Fourier
Transform (FFT) is performed on each 10 ms block of data to
analyze the frequency components of the signal. The library,
adapts to changes in the nature and level of noise, and
does not require a separate noise reference input.
Key Features
■
■
■
■
■
■
■
■
0 dB to 44 dB noise reduction
Audio bandwidth: 0-4 kHz at 8 kHz sampling rate
Simple user interface – only one library file and one
header file
All functions called from a C application program
Full compliance with the MPLAB® C Compiler, Assembler
and Linker
Highly optimized assembly code that uses DSP
instructions and advanced addressing modes
Comprehensive API provides parametric control of the
noise suppression engine
Supported by Microchip SAFF Tool
Applications
■
■
■
■
■
■
■
Hands-free cell phone kits
Speaker phones
Intercoms
Teleconferencing systems
Headsets
A front-end to a speech recognition system
Any microphone-based application that needs to eliminate
undesired noise
www.microchip.com/16bit • www.microchip.com/32bit
(SW300040)
7