Microchip dsPIC33FJ128GP706A Manual de Usario

Microchip No categorizado dsPIC33FJ128GP706A

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© 2010 Microchip Technology Inc. DS70295B
dsPIC® DSC SPEECH
CODING SOLUTIONS
USERS GUIDE
DS70295B-page 2 © 2010 Microchip Technology Inc.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
KEE EELOQ, K LOQ logo, MPLAB, PIC, PICmicro, PICSTART,
PIC32 logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified
logo, MPLIB, MPLINK, mTouch, Octopus, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance,
TSHARC, UniWinDriver, WiperLock and ZENA are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2010, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-60932-085-0
Note the following details of the code protection feature on Microchip devices:
Microchip products meet the specification contained in their particular Microchip Data Sheet.
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
dsPIC® DSC SPEECH CODING
SOLUTIONS USERS GUIDE
© 2010 Microchip Technology Inc. DS70295B-page 3
Table of Contents
Preface ........................................................................................................................... 5
Chapter 1. Overview
1.1 Overview ...................................................................................................... 11
1.2 Other Features ............................................................................................. 12
Chapter 2. Installation
2.1 Installation Procedure ................................................................................... 13
2.2 G.711 Library Files ....................................................................................... 13
2.3 G.726A Library Files ..................................................................................... 15
2.4 Speex Library Files ....................................................................................... 17
Chapter 3. Application Programming Interface
3.1 Application Programming Interface .............................................................. 19
3.2 System Requirements .................................................................................. 19
3.3 G.711 API ..................................................................................................... 21
3.4 G.726A API .................................................................................................. 25
3.5 Speex API .................................................................................................... 32
Chapter 4. Integrating Speech Encoding Into YourApplication
4.1 Integrating Speech Encoding ....................................................................... 37
4.2 Data Buffers ................................................................................................. 37
4.3 Encoder Initialization .................................................................................... 38
4.4 Encoder Heap Utilization .............................................................................. 39
4.5 Data Sampling Initialization .......................................................................... 39
4.6 Data Sampling .............................................................................................. 39
4.7 Encoding ...................................................................................................... 40
4.8 End Data Sampling ..................................................................................... 41
Chapter 5. Integrating Speech Decoding Into YourApplication
5.1 Integrating Speech Decoding ....................................................................... 43
5.2 Data Buffers ................................................................................................. 43
5.3 Decoder Initialization .................................................................................... 44
5.4 Decoder Heap Utilization .............................................................................. 46
5.5 Decoding the First Frame ............................................................................. 46
5.6 Speech Playback Initialization ...................................................................... 46
5.7 Speech Playback .......................................................................................... 46
5.8 Decoding ...................................................................................................... 47
5.9 Ending Speech Playback ............................................................................. 50
Chapter 6. Speech Encoding Utility
6.1 System Requirements .................................................................................. 51

Especificaciones del producto

Marca: Microchip
Categoría: No categorizado
Modelo: dsPIC33FJ128GP706A

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