ISCSLP Tutorial 2

Prof. Chung-Hsien

• Arousal & Valence coordinator
• separate emotion process to sub emotions

• available databases:
• database collection:

• acted : GEneva multimodeal emotion portrayals (GEMEP)
• induced : eNTERFACE'05 EMOTION Database
• spontaneous: SEMAINE, AFEW

others: RML,VAM ,FAU AUBO,SAVEE,TUMAVIC,IEMOCAP,SEMAINE MHMC

• static vs dynamic modeling

STATIC:

• low level descriptors (LLDs) and functionals
• good for discriminate high and low-arousal emotions
• temporal information is lost, no suitable for long utterances, can not detect change in emotion

DYNAMIC:

• frame as the basis, LLDs are extracted and modeled by GMMs, HMMs, DTW
• temporal information is obtained
• difficult to model context well
• a large number of local features need to be extracted,

• Unit choice for dynamic modeling

• technical unit: frame, time slice, equally-divided unit
• meaningful unit: word, syllable, phrases
• emotionally consistent unit: emotion profiles, emotograms
• different aspects of speech tasks place in different scale

• feature concatenation or decision fusion to exploit the information from segmented units

• speech features:

• prosody feature, pitch, formants, energy, speaking rate, good arosal emotions
• ZCR, RMS energy, F0, harmonic noise ratio, MFCC
• MFCC
• Teager feature is good for detecting streess

• recognition models

• SVM, ANN, HMM, GMM, CART

• Emotion distillation framework

• emotion specific features from the original high-dimensional feature
• from speech signals, using SVM to generate emotiongrams, and then use HMM, n-gram, LDA, simple sum, give emotion output

• Hierarchical classification structure

• first detect high/low arosal

• Fusion based recognition

• Feature level fusion
• decision level fusion
• Model based fusion: mutli stream HMM

• Temporal phase-based modeling

• divide the emotion into onset, apex, offset
• using HMM to chracterize one emotional sub-state, instead of the entire emotional state
• totally 6 states: (onset,apex, offset) X (high, low)
• Temporal course modeling

• Structure-based modeling

• three level units: utterance, emotion units, sub emotion units
• use statistic model among different levels

Hsin-Min Wang

• Music information retrieval (MIR)

• title search
• search by query:
• emotion of songs labelled by persons forms a Gaussian
• represent the aoustic features of a song by a probabilistic history vector
• acoustic GMM posterior representation as a feature
• GMM code book constructed in training (VA GMM)
• can put the tag into VA space

• Video to Audio Retrieval

• First predict video emotion
• put audio
• this can be reverse

Emotion variability, by Prof. Julien Epps:

• GMM supervector based emotion

• t-SNNE for visualization in 2-D space
• remove phone variability by phone dependent GMMs
• speaker normalization is important for emotion recognition
• two ways: speaker adaptation & speaker signal normalization
• KL-based estimation on speaker and emotion variability
• speaker normalization by feature warping

:* speaker variation modeling with JFA

• Speaker adaptation : speaker library