Speech Processing Course Number: 40967 Semester: 1397-2 - PowerPoint PPT Presentation

Speech Processing

Course Number: 40967  Semester: 1397-2  Instructor: Hossein Sameti   Room CE706  sameti@sharif.edu Home page: CE courses  2

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 3

Speech Processing:  Marking Scheme:  Homeworks (written and programming): 20%  Course Projects: 10%  Quizzes: 15%  Midterm: 25%  Final Exam: 30% 4

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:  40967spring97 5

 وطسرا ‌: تسا قطان ناويح ،ناسنا . 6

Old Speech Synthesizers – Speech organ of Wheatstone, based on a system proposed by Wolfgang von Kempelen in 1791 7

Old Speech Synthesizers (cont ’ d) – Speech organ of Joseph Faber (1830-40) 8

Old Speech Synthesizers (cont ’ d) – Voder demonstrated in 1939 Source: http://www.ling.su.se/staff/hartmut/kemplne.htm 9

More modern labs (ICP lab in Grenoble, France) – Study of the face movements to be included in speech synthesis (and recognition). 10

Communication via Spoken Language 11

Communication via Spoken Language 12

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 13

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. 14

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 15

A Conversational System Architecture 16