/
CS460/626 : Natural Language CS460/626 : Natural Language

CS460/626 : Natural Language - PowerPoint Presentation

finestlaxr
finestlaxr . @finestlaxr
Follow
342 views
Uploaded On 2020-08-28

CS460/626 : Natural Language - PPT Presentation

ProcessingSpeech NLP and the Web Lecture 31Inside and Outside probabilities PCFG training start of phonetics and phonology Pushpak Bhattacharyya CSE Dept IIT Bombay 29 th March 2011 ID: 809086

pcfg probability voiceless phonetics probability pcfg phonetics voiceless speech kudo voiced phonology training sound languages discovered sentence plural calculation

Share:

Link:

Embed:

Download Presentation from below link

Download The PPT/PDF document "CS460/626 : Natural Language" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.


Presentation Transcript

Slide1

CS460/626 : Natural Language Processing/Speech, NLP and the Web(Lecture 31–Inside and Outside probabilities; PCFG training; start of phonetics and phonology)

Pushpak Bhattacharyya

CSE Dept.,

IIT

Bombay

29

th

March, 2011

Slide2

PCFG: inside and outside probabilities

Slide3

Inside probability β

Sentence probability

Slide4

Calculation of β

Slide5

Outside probability α

Sentence probability

Slide6

Calculation of α

Slide7

PCFG Training

Slide8

EM Algorithm for training

Slide9

Phonetics and Phonology

Slide10

Morphology to Phonology: an exerciseThe plural morpheme:-s:/s/ (cats)/z/ (dogs)/iz/ (bushes)

Which sound

should occur

where?

Slide11

Phonetics and PhonologyPhonetics: The study of speech soundsArticulatoryAcousticAuditoryPhonology: the structure and patterning of soundsPhonetic Transcription:

A writing system for representing speech sounds

Slide12

The need for phonetic transcriptionEccentricity of English SpellingPut/PuttCar/KiteRough/PuffFish can be spelt ‘ghoeti’. How

?

A language for talking about other/newly discovered languages

New languages

without a writing system are discovered often

Slide13

Slide14

ClassificationManner of articulationPlace of articulationVoicedness

Slide15

Stops/p/ - voiceless bilabial/b/ - voiced bilabial/t/ - voiceless alveolar/d/ - voiced alveolar/k/ - voiceless velar/g/ - voiced velar

Slide16

Fricatives/f//v//th//dh//s//sh/

/

zh

/

/h/

Slide17

Affricates/ch//jh/

Slide18

Nasals/m//n//ng/

Slide19

Slide20

The plural soundCats, racks … /s/dogs, rags … /z/Bushes, classes … /iz/Hypotheses?

Slide21

A kudo to each of you!Kudos: pronounced with an /s/ sound at the endMisinterpreted as a pluralOne kudo, many kudosPronunciation becomes kudo/z/!