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| pruefungen:hauptstudium:ls5:slu-2021-10-04 [08.10.2021 12:54] – angelegt Otto | pruefungen:hauptstudium:ls5:slu-2021-10-04 [08.10.2021 12:56] (aktuell) – gelöscht Otto | ||
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| - | ====== Speech and Language Understanding (SLU) 5 ECTS Prüfung 2021-10-04 ====== | ||
| - | |||
| - | ===== Meta Information ===== | ||
| - | * Subject: Speech and Language Understanding (SLU) 5 ECTS, Summer semester | ||
| - | * Date: 2021-10-04 | ||
| - | * Type of Exam: oral via Zoom | ||
| - | * Examiner: Prof. Andreas Maier | ||
| - | * Evaluation | ||
| - | * Atmosphere was quite relaxed | ||
| - | * Important to know detailed answers | ||
| - | |||
| - | ===== Exam ===== | ||
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| - | * Summarize the lecture | ||
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| - | > Mind Map | ||
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| - | * Short overview about how do we percieve sounds & produce sounds? | ||
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| - | > Description of ear / Fants Source Filter | ||
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| - | * About phonetics and phonemes, major classes and how do they look in the spectogram? | ||
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| - | > Vowels, Fricatives, Plosives, Nasaln, Laterals... | ||
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| - | * How to compute MFCCs? | ||
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| - | > We have a signal, window it - calculate power spectrum - use Mel Filterbanks (25) - log - discrete cosine transform - use first 12 features. (Replace 0 frequency with energy of the signal) | ||
| - | |||
| - | * Some follow up questions e.q. why windowing, why do the Filterbanks look like that. | ||
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| - | > FT for pariodic signals; window allow us to interpret the short time as periodic. | ||
| - | > Filterbanks design inspired by the Cholea | ||
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| - | * Talked about N-Grams (Zerogram, Monogram, etc. - Smoothing Backoff strategies) | ||
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| - | * Explain Categories, how can they be used. | ||
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| - | * Next question about Speaker Identification | ||
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| - | > Explained UBM - GMM & MAP | ||
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| - | * Whats the difference between UBM + MAP & GMM for every Speaker with EM | ||
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| - | * Last question: What is your favourite DL approach and explain it | ||
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| - | > LSTM - made the drawing and explained it | ||