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Speech Processing

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Speech Processing: Review of DSP Concepts

Review of Probability and Stochastic Processes

Anatomy and Physiology of Speech Production System

Phonemics and Phonetics

Spectrogram Reading

Linear Prediction Analysis

Speech Coding and Compression

Speech Synthesis (Text to Speech)

Speech Quality Assessment (Subjective and

Objective)

Speech Recognition (Speech to Text)

Speech Enhancement

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Speech Processing:

Marking Scheme:

Homeworks:10%

Projects : 15%

Quizzes: 20%

Midterm: 25%

Final Exam: 30%

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Speech Processing:

Text: Spoken language processing

Huang, Acero, Hon, 2000

Introduction to Digital Speech Processing Lawrence R. Rabiner and Ronald W. Schafer, 2007

Discrete time processing of speech Signals Deller,Proakis,Hansen,1993

Fundamentals of speech recognition Rabiner,Juang,1993

Password for any documents for the course:

40967spring93

ارسطو‌:

.انسان،‌حيوان‌ناطق‌است

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Old Speech Synthesizers

– Speech organ of Wheatstone, based on a system proposed by Wolfgang

von Kempelen in 1791

Old Speech Synthesizers

(cont’d)

– Speech organ of Joseph Faber (1830-40)

Old Speech Synthesizers

(cont’d)– Voder demonstrated in 1939

Source: http://www.ling.su.se/staff/hartmut/kemplne.htm

More modern labs (ICP lab in Grenoble, France)

– Study of the face movements to be included in speech synthesis (and

recognition).

Communication via Spoken Language

Communication via Spoken Language

Virtues of Spoken Language

Natural: Requires no special training

Flexible: Leaves hands and eyes free

Efficient: Has high data rate

Economical: Communicated inexpensively

Expressive: Conveys more than just words

Popular/preferred: Verbal-acoustic problem solving

Much longer evolution, compared to written language

Virtues of Spoken Language

Speech interfaces are ideal for

information access and management

when:

The information space is broad and complex,

The users are not allowed (or at ease or capable) to use

their eyes to read text messages,

The users are technically naive, or

Only telephones are available.

Diverse Sources of Constraint for

Spoken Language Communication

Acoustic: human vocal tract

Phonetic: let us pray

lettuce spray

Phonological: gas shortage

fish sandwich

Phonotactic: sprachst (german)

Syntactic: I am flying to Chicago tomorrow

tomorrow I flying Chicago am to

Semantic: Is the baby crying

Is the bay bee crying

Contextual: It is easy to recognize speech

It is easy to wreck a nice beach

A Conversational System Architecture

Demo: Conversational

Interface Jupiter weather information system

Access through telephone

500 cities worldwide

Harvest weather information from the Web

several times daily