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ENEE408G: Capstone Design Project:

Multimedia Signal Processing

Design Project 1:Digital Speech Processing

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Outline of Design Project 1

Part I : Speech Analysis Part II : Speech Coding: Linear Predictive

Vocoder Part III: Speech Recognition by IBM

ViaVoice Part IV: Speech Synthesis Part V : Human Computer Interface Part VI: Mobile Computing and Pocket PC

Programming

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Adjust the Microphone Device

Use Sound Recorder By accessoriesentertainmentsound

recorder Select Line-In 2/Mic 2

By Editaudio propertiessound recording Volume

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Part I. Speech Analysis (1)

• Human Vocal Apparatus

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Part I. Speech Analysis (2)

ImpluseTrain

Generator

Vocal TractModel

Pitch Period

Vocal TractParameters

speech

WhiteNoise

X

Voiced

Unvoiced G

• Vocal Tract Model

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Part I. Speech Analysis (3)

COLEA toolbox: Waveform on Time Domain Spectrogram Pitch and Formant Tracking LPC Spectra

Record your own voice and analyze pitch and formants.

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Part I. Speech Analysis (4)

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Part I. Speech Analysis (5)

LPC Analysisby proclpc.m

FeaturesExtraction for

Training Set

GenderIdentificatoin

TrainingSet

Unknow genderwave files

Male / Female

Gender Identification: Use Auditory Toolbox to obtain Linear

Predictive coefficients. Design your algorithm to identify the gender

of samples in the training set. Test your algorithm on 9/26 by new

samples.

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Pat II. Linear Predictive Vocoder: Encoder

Encoder:

FrameSegmentation&LPC analysisproclpc.m

OrignalSpeech

LPC to LSPlpcar2ls.m

Q{wk}k=1~10 {ak}k=1~10

QGain, UV/V,T

2.4kbpscompressed

Speech

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Part II. Linear Predictive Vocoder:Decoder

2.4kbpscompressed

Speech

iQ

iQ

LSP to LPClpcls2ar.m

{w’k}k=1~10 {a’k}k=1~10

Gain’

Impluse TrainGenerator

White Noise

UV/V,T’

LPCsynthesis &

Framecombinationsynlpc.m

Source

ReconstructedSpeech

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Part III. Speech Recognition

IBM ViaVoice ViaVoice Training: Operate PC by ViaVoice

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Part III. IBM ViaVoice Training

Start from BLUE word.

Keep specking, the recognized words become GRAY.

If you hear sounds or the BLUE sign stop in a specific word, return to the blue word and read the BLACK sentence again.

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Part III. IBM ViaVoice Dictation

Speak Pad

Menu Bar: 1. Menu Button 2. Microphone State 3. Status Area 4. ViaCenter Help 5. Current User

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Part IV. Speech Synthesis

Text-To-Speech and Talking Head

Vowel Synthesis

Demo

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Part V. Human Computer Interface

CSLU Human Computer Interface Rapid Application Developer (RAD) StartSpeech Toolkit RAD

MIT Galaxy System JUPITER: Weather Information System

http://www.sls.lcs.mit.edu/sls/applications/jupiter.shtml

TEL: 1-888-573-8255 PEGASUS: Airline Flight Planning System

http://www.sls.lcs.mit.edu/sls/applications/pegasus.shtml

TEL: 1-877-527-8255

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Part VI. Pocket PC Programming

Apply what you learned from previous parts and design a simple application related to digital speech processing by Microsoft eMbedded Tools for Pocket PC.

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Announcement

Matlab task: Part II C++ task: Part VI Check out Pocket PC