AC300031 Microchip Technology, AC300031 Datasheet
AC300031
Manufacturer Part Number
AC300031
Description
KIT ACCESSORY SPEECH RECOGNITION
Manufacturer
Microchip Technology
Datasheet
1.AC300031.pdf
(2 pages)
Specifications of AC300031
Accessory Type
Accessory Kit
For Use With/related Products
Speech Recognition Library
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
dsPIC30F Speech Recognition Library
Summary
The dsPIC30F Speech Recognition Library provides voice control
of embedded applications that require an alternative user
interface. With a vocabulary of up to 100 words, the Speech
Recognition Library allows users to control their application
vocally. The Speech Recognition Library is an ideal front end for
hands-free products such as modern appliances, security panels
and cellphones. The Speech Recognition Library has very modest
memory and processing requirements and is targeted for the
dsPIC30F5011, dsPIC30F5013, dsPIC30F6012 and
dsPIC30F6014 processors.
Description
The Speech Recognition Library provides isolated, speaker-
independent word recognition of US English. It allows a user to
control an application through a set of fixed, voice commands.
The library has already been pre-trained by a demographic
cross-section of male and female US English speakers.
Conveniently, no training is required for end-users of the
product.
The library samples speech data from a voice codec connected
to the dsPIC30F's Data Converter Interface. The data is
processed a frame at a time, and when a word ending is
detected, the received word is identified using Hidden Markov
Model processing. After the library identifies the word, your
application may then take some pre-defined action.
The Speech Recognition algorithm is written in assembly
language to optimize performance and minimize RAM usage. A
well defined API makes it easy to integrate the Speech
Recognition Library with your application. Library functions let
your application easily disable and enable speech recognition.
The library lets your other system processing operations take
place without disrupting speech recognition.
A PC-based Word Library Builder program allows you to build a
custom library from a Master Library of 100 common words. A
noise profile is selected that suits your operating environment.
The noise profile consists of a noise type and a signal-to-noise
ratio (SNR). The noise type can be any combination of 3
different noise sources (automobile, office and white noise),
and the SNR may be as low as 15 dB. The Word Library Builder
program generates source files that you then use to build your
application. These files contain data tables that the library
uses to perform speech recognition.
M i c r o c h i p T e c h n o l o g y I n c o r p o r a t e d
Features
Key features of the dsPIC Speech Recognition Library include:
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Devices Supported
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Resource Requirements
Sampling Interface: Si-3000 Audio Codec operating at 12.0 kHz
System Operating Frequency: 12.288, 18.432 or 24.576 MHz
Computational Power: 8 MIPs
Program Flash Memory: 18 KB + 1.5 KB for each library word
RAM: <3.0 KB
US English language support
Speaker-independent recognition of isolated words
No speaker training is required
Hidden-Markov Model based recognition system
Recognition time < 500 msec
Master Library of 100 common words (available in dsPIC30F
Speech Recognition Library User’s Guide)
Windows®based utility allows you create a custom library
from the master library
Additional words can be added to the master library
(fee based)
Data tables can be stored in external memory
Optional Keyword Activation and Silence Detection
Optional system self-test using a predefined keyword
Flexible API
Full compliance with Microchip MPLAB®C30 Language Tools
dsPIC30F Speech Recognition Library User’s Guide
Designed to run on dsPICDEM™ 1.1 General Purpose
Development Board (DM300014)
dsPIC30F5011
dsPIC30F5013
dsPIC30F6012
dsPIC30F6014
Application
Board
Codec
Audio
dsPIC30F
Speech Recognition
User Application
Library
(optional)
External
Flash
(appliance,
Controlled
handset,
security
system,
Device
etc...)
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AC300031 Summary of contents
Page 1
Speech Recognition Library Summary The dsPIC30F Speech Recognition Library provides voice control of embedded applications that require an alternative user interface. With a vocabulary 100 words, the Speech Recognition Library allows users to control their application ...
Page 2
... Speech Recognition Library Software License (5K+ to 25K units) SW300012 dsPIC30F Speech Recognition Library Software License (25K+ to 100K units) AC300031 Accessory Kit – Fixed 10-word Demo (includes: microphone, headset and 6.144 MHz clock oscillator) Note 1: The evaluation version offers the same functions and features as the other versions. The evaluation period is one year. ...