DM300027 Microchip Technology, DM300027 Datasheet - Page 12

• 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 audio library for PIC32 MCUs consists of APIs for
Pulse Code Modulation, Adaptive Differential Pulse Code
Modulation and Speex encoding and decoding algorithms.
Speex is an Code Excited Linear Prediction (CELP) based
open source patent-free audio compression format designed
for speech. The ADPCM algorithm takes advantage of the
high correlation between consecutive speech samples, which
enables future sample values to be predicted.
Key Features
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ADPCM and Speex (Audio) Library for PIC32 MCUs
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Free software/open-source, patent and royalty-free
Portable across all PIC32 microcontrollers
Supported encoding formats: PCM (raw, uncompressed),
IMA ADPCM, Speex
Implements an audio player behavior with play, record,
pause, stop functionality
Supports standard input/output stream formats: Wave,
Ogg for Speex, as well as a raw format containing just
data
Software Solutions and Tools for the 16-bit and 32-bit Designer
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Applications
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Supports various sampling rates in both play and record
mode
Supports narrowband (8 KHz) and wideband (16 KHz)
bit-streams for Speex
Provides information about the missed samples
User selectable ratio between the sampling frequency and
the play/record frequency
Answering machines
Building and home safety systems
Intercoms
Smart appliances
Voice recorders
Walkie-talkies
Toys and robots
Any application using message playback