DM300027 Microchip Technology, DM300027 Datasheet - Page 11

• 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 G.726A Speech Encoding/Decoding
Library performs toll-quality voice compression and
voice decompression. The encoding algorithm used is
Adaptive Differential Pulse Code Modulation (ADPCM). The
compression can be configured by the user to be either
3.2:1, 4:1, 5.33:1 and 8:1, corresponding to output data
rates of 40, 32, 24 and 16 kbps respectively. The G.726A
library is suitable for both half-duplex and full-duplex
systems.
Key Features
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Summary
The dsPIC® DSC Speex Speech Encoding/Decoding
Library performs toll-quality voice compression and voice
decompression. The library is a modified version of the
Speex speech coder made specifically for the dsPIC DSC
families and features a multiple compression ratio. Encoding
uses popular Code Excited Linear Prediction (CELP)
techniques. The library is appropriate for both half-duplex
and full-duplex systems.
Key Features
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dsPIC® DSC G.726A Speech Encoding/Decoding Library
dsPIC® DSC Speex Speech Encoding/Decoding Library
Compression Ratio
Sampling Frequency
Output Data Rate
MIPS
MOS
Adaptive Differential Pulse Code Modulation (ADPCM) –
based coding
Playback-only applications benefit from the speech
encoder utility. Encoded files can be created from the
desktop using a PC microphone or WAV file
Multiple encoders and/or decoders can be instantiated
Full-duplex and half-duplex operations
Compact and concise API for easier integration with
application
16:1 /11.6:1
8 KHz
8 Kbps/11 Kbps
20
3.7-4.2
26:1/20:1
16 KHz
9.8/12.8 Kbps
30
3.5-4
Applications
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G.726A
PC-based Speech Encoder Utility Program
Applications
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Compression Ratio
Sampling Frequency
Output Data Rate
MIPS
MOS
Memory
Intercoms
Emergency phones
Walkie-talkies
Mobile hands-free kits
Digital radios
Voice-over-IP telephony
Building and home safety systems
Smart appliances
Voice recorders
Answering machines
Answering machines
Building and home safety systems
Intercoms
Smart appliances
Voice recorders
Walkie-talkies
Any application using message playback
www.microchip.com/16bit • www.microchip.com/32bit
3.2:1 to 8:1
8 KHz
16-40 Kbps
15
3.5-4.5
2-5 KB/Sec of Speech
(SW300070)
(SW300090)
11