Speech Processing August 4, 2005 12/2/2018.

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Speech Processing August 4, 2005 12/2/2018

CS 224S / LINGUIST 236 Speech Recognition and Synthesis Dan Jurafsky Lecture 1: Overview and Articulatory Phonetics 12/2/2018

Applications of Speech Recognition/Understanding (ASR/ASU) Dictation Telephone-based Information (directions, air travel, banking, etc) Hands-free (in car) Second language ('L2') (accent reduction) Audio archive searching 12/2/2018

Applications of Speech Synthesis/Text-to-Speech (TTS) Games Telephone-based Information (directions, air travel, banking, etc) Eyes-free (in car) Reading/speaking for disabled Education (Reading tutors, L2) 12/2/2018

Applications of Speaker/ Language Recognition Language recognition for call routing Speaker Recognition: Speaker verification (binary decision) Voice password, telephone assistant Speaker identification (one of N) Criminal investigation 12/2/2018

State of the Art ASR speaker-independent, continuous, no noise, world’s best research systems: Human-human speech: ~13-20% Word Error Rate (WER) Human-machine speech: ~3-5% WER 12/2/2018