COGS 100 Lecture Notes - Lecture 13: Speech Recognition, Natural-Language Processing, Cognitive Linguistics
30 Oct 2017
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Chomsky: there is a universal grammar and we are born with that knowledge. Shows human intelligence and use of rules of syntax, semantics, phonology and morphology. Difficult to design machines that can get feedback from conversations as humans do. Pragmatic rules based on social knowledge and context is hard to program in machines with limited contextual knowledge. Same letter based on context can produce different phonemes. Natural languages have evolved and are used by humans. Cross disciplinary research on ai and linguistics focuses on using computational approaches to understand and generate speech in natural language. Four stages of natural language processing (cawsey, 1998): Spoken language is converted to a speech spectrogram showing frequency changes over time frequency changes over time. Analyze individual words in the order they occurred. E. g. analyze the phrase-structure by breaking down the sentence to its hierarchical constituents. The result is understanding how the words are grammatically related in the sentence structure.
