NDLI: The purpose, history, current state, and some evolving trends in feature extraction for speech recognition

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ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359)

Advances and challenges in speech, audio and acoustics processing for multimedia communications

Biomedical signal processing: present and future

New directions in automatic speech recognition: a communication perspective

Multirate systems: an introduction, operation and applications

Time-frequency signal processing: methods and algorithms

The purpose, history, current state, and some evolving trends in feature extraction for speech recognition

Modeling speech production and perception mechanisms and their applications to synthesis, recognition, and coding

Multimodal image-guidance for noninvasive surgery: registration, segmentation, and statistical imaging models

Applications of data hiding in digital images

Multimedia computing-a new object-oriented paradigm

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Unequal error protection of images over Rayleigh fading channels

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Statistical division based modeling for multimedia network traffic

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Software video coding for handheld conferencing

Decomposition of voiced speech into all-pole filter and sinusoidal excitation

A simplified informax approach for blind signal separation

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Pitch estimation and a measure of voicing from pseudo-spectra

Least squares approach for lossless image coding

Adaptive linear prediction of MPEG video traffic

Multiscale location equivalence and wavelet image transforms on the quincunx lattice

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Speaker identification using a polynomial-based classifier

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Fourth International Symposium on Signal Processing and Its Applications

The purpose, history, current state, and some evolving trends in feature extraction for speech recognition

Content Provider	IEEE Xplore Digital Library
Author	Hermansky, H.
Copyright Year	1999
Description	Author affiliation: Graduate Inst. of Sci. & Technol., Portland, OR, USA (Hermansky, H.)
Abstract	Summary form only given, as follows. Firstly, the basic principles of automatic recognition of speech are reviewed. The acoustic analysis module is focused on in greater detail and distinctions between its two main blocks, the pattern classification and the feature extraction, are discussed. The early history of speech feature extraction mentions early attempts of Newton and Helmholtz to characterize information bearing components of vowels, and Scripture's analysis of phonographic voice recordings. The concept of short-term analysis and spectrograms is introduced together with the linear model of speech production. Reasons for spectral envelope estimation in ASR as well as basic techniques for its estimation such as homomorphic analysis and linear predictive analysis are introduced. Cepstrum as an approximation to Karhunen-Loeve transformation and cepstral lifters as means for modifying properties of simple Euclidean cepstral distances are also introduced. Inconsistencies of simple envelope estimation techniques with human speech perception are mentioned. Reasons for auditory-like feature extraction and some currently dominant auditory-like techniques such as Mel cepstral analysis and perceptual linear prediction (PLP) are described. The concept and basic properties of a modulation spectrum of speech is explained and its historical use in predicting intelligibility of speech in auditoria is mentioned. Dynamic features (delta, double-delta) are discussed, with a special focus on their interpretation as FIR filters applied to modulation spectrum of speech. RASTA filtering is introduced as an extension of FIR filtering done in dynamic feature estimation and reasons for its robustness to changes in communication environments explained. Interesting consistencies of RASTA processing with temporal properties of human hearing such as forward masking is also mentioned. The need for data-driven feature extraction is discussed and techniques for design of discriminant spectral basis and of discriminant RASTA filters are described with recent results of their applications in automatic recognition of speech and in speaker recognition. The concept of multi-band recognition of speech is introduced and its inherent robustness in presence of colored noise is discussed. The concept is further generalized into more general sub-stream based recognition and some techniques for merging of information sub-streams are described. Finally, recently introduced speech recognition from temporal patterns of spectral energies is described, and its inherent advantages in recognition of speech in adverse environments discussed.
File Size	80558
File Format	PDF
ISBN	1864354518
DOI	10.1109/ISSPA.1999.818095
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-08-22
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	History Cepstral analysis Finite impulse response filter Automatic speech recognition Feature extraction Speech analysis Speech recognition Humans Filtering Pattern analysis
Content Type	Text
Resource Type	Article

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