Search results for: Yongwon Jeong

Items from 1 to 14 out of 14 results

article

Basis-Based Speaker Adaptation Using Partitioned HMM Mean Parameters of Training Speaker Models

Yongwon Jeong

Journal of Signal Processing Systems > 2016 > 82 > 3 > 303-310

This paper presents the basis-based speaker adaptation method that includes approaches using principal component analysis (PCA) and two-dimensional PCA (2DPCA). The proposed method partitions the hidden Markov model (HMM) mean vectors of training models into subvectors of smaller dimension. Consequently, the sample covariance matrix computed using the partitioned HMM mean vectors has various dimensions...

article

Joint speaker and environment adaptation using TensorVoice for robust speech recognition

Yongwon Jeong

Speech Communication > 2014 > 58 > Complete > 1-10

We present an adaptation of a hidden Markov model (HMM)-based automatic speech recognition system to the target speaker and noise environment. Given HMMs built from various speakers and noise conditions, we build tensorvoices that capture the interaction between the speaker and noise by using a tensor decomposition. We express the updated model for the target speaker and noise environment as a product...

article

Adaptation of hidden markov model mean parameters using two-dimensional PCA with constraint on speaker weight

Yongwon Jeong

Electronics Letters > 2014 > 50 > 7 > 550 - 552

A basis-based speaker adaptation technique is proposed, where basis vectors are derived using two-dimensional principal component analysis (2DPCA) and the speaker weight for the target speaker is constrained in the space of training speaker weights. During adaptation, the speaker weight that is derived in the maximum-likelihood framework is constrained by projecting the weight into the space of the...

article

Unified framework for basis-based speaker adaptation based on sample covariance matrix of variable dimension

Yongwon Jeong

Speech Communication > 2013 > 55 > 2 > 340-346

We present a unified framework for basis-based speaker adaptation techniques, which subsumes eigenvoice speaker adaptation using principal component analysis (PCA) and speaker adaptation using two-dimensional PCA (2DPCA). The basic idea is to partition a Gaussian mean vector of a hidden Markov model (HMM) for each state and mixture component into a group of subvectors and stack all the subvectors...

article

Speaker adaptation in the maximum a posteriori framework based on the probabilistic 2-mode analysis of training models

Yongwon Jeong

EURASIP Journal on Audio, Speech, and Music Processing > 2013 > 2013 > 1 > 1-11

In this article, we describe a speaker adaptation method based on the probabilistic 2-mode analysis of training models. Probabilistic 2-mode analysis is a probabilistic extension of multilinear analysis. We apply probabilistic 2-mode analysis to speaker adaptation by representing each of the hidden Markov model mean vectors of training speakers as a matrix, and derive the speaker adaptation equation...

article

Acoustic Model Adaptation Based on Tensor Analysis of Training Models

Yongwon Jeong

IEEE Signal Processing Letters > 2011 > 18 > 6 > 347 - 350

We present a tensor analysis of acoustic models comprising various speakers in multiple noise conditions, and its application to the new speaker and environment adaptation for speech recognition. The bases used in adaptation are constructed by decomposing the training models in the state, feature dimension, speaker, and noise spaces using multilinear singular value decomposition. The isolated-word...

chapter

Speaker adaptation based on the multilinear decomposition of training speaker models

Yongwon Jeong

2010 IEEE International Conference on Acoustics, Speech and Signal Processing > 4870 - 4873

2010 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2010

This paper presents a novel speaker adaptation method based on the multilinear analysis of training speakers using Tucker decomposition. A Tucker decomposition of training models can decouple the dataset into the subspaces of state, dimension of the mean vector, and speaker. Using the bases of the state subspace, we derive a speaker adaptation formula where the matrix of basis vectors is weighted...

article

New Speaker Adaptation Method Using 2-D PCA

Yongwon Jeong, Hyung Soon Kim

IEEE Signal Processing Letters > 2010 > 17 > 2 > 193 - 196

This letter describes a speaker adaptation method based on the two-dimensional PCA of training models. In the method, state and dimension of mean vectors are differentiated, and the covariance matrix is computed dimension-wisely. As a result, the speaker weight can contain different weighting for each dimension of mean vectors. In the isolated-word recognition experiments, the proposed method performed...

chapter

A new method for speaker adaptation using bilinear model

Hwa Jeon Song, Yongwon Jeong, Hyung Soon Kim

2009 IEEE International Conference on Acoustics, Speech and Signal Processing > 4365 - 4368

ICASSP 2009 - 2009 IEEE International Conference on Acoustics, Speech and Signal Processing

In this paper, a novel method for speaker adaptation using bilinear model is proposed. Bilinear model can express both characteristics of speakers (style) and phonemes across speakers (content) independently in a training database. The mapping from each speaker and phoneme space to observation space is carried out using bilinear mapping matrix which is independent of speaker and phoneme space. We...

article

PDMS micro bead cage reactor for the detection of alpha feto protein (AFP)

Yongwon Jeong, Kihwan Choi, Jinseok Kim, Doo Soo Chung, more

Sensors & Actuators: B. Chemical > 2008 > 128 > 2 > 349-358

In this paper, we showed that it is possible to conduct the pretreatment reaction procedure for the disease diagnosis by using just single chip with nanoliter sample consumption. A polydimethylsiloxane (PDMS) micro-pillar with a diameter and height of 30μm was developed for bead platform. The micro reaction chamber that is surrounded by the PDMS pillar structure has 90nl volume (3mm×1mm×30μm). The...

article

Reslicing axially sampled 3D shapes using elliptic Fourier descriptors

Yongwon Jeong, Richard J. Radke

Medical Image Analysis > 2007 > 11 > 2 > 197-206

We propose a new method that interpolates between parallel slices from a 3D shape for the purposes of reslicing and putting into correspondence organ shapes acquired from volumetric medical imagery. By interpolating the coefficients of elliptic Fourier descriptors for a set of parallel contours, a new set of slices can be directly generated at desired axial locations. Neither an explicit correspondence...

article

Transient isotachophoresis of highly saline samples using a microchip

Yongwon Jeong, Kihwan Choi, Moon Koo Kang, Kukjin Chun, more

Sensors & Actuators: B. Chemical > 2005 > 104 > 2 > 269-275

Transient isotachophoresis (TITP) of a highly saline solution has been achieved on a polydimethylsiloxane chip of 18mm x 12mm. The microchannel dimensions were 30μm in width and 30μm in depth. The injection plug length was varied from 12 to 28mm to inject samples of large volume while the total channel length was fixed at 75mm. Chloride ions abundant in the saline sample and N-tris(hydroxymethyl)methyl-3-aminopropanesulfonate...

chapter

Potential of Poly-(N-Isopropylacrylamide) hydrogel as a clamper of the microrobot in gastrointestinal tract

Jinseok Kim, Soohyun Kim, Yongwon Jeong, Sewan Park, more

2005 IEEE Engineering in Medicine and Biology 27th Annual Conference > 4046 - 4049

2005 27th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

We successfully demonstrate that a thermally actuated reversible hydrogel, the poly N-isopropylacrylamide (PNIPAAm), based clampers holds the intestines of a pig during the inchworm motion of microrobot. Although there are no direct relationship between hydro affinity and friction force, we found the significant friction force difference according to the surface condition change of PNIPAAm hydrogel...

article

Package embedded heat exchanger for stacked multi-chip module

Haehyung Lee, Yongwon Jeong, Joonghan Shin, Joonghyun Baek, more

Sensors & Actuators: A. Physical > 2004 > 114 > 2-3 > 204-211

This paper describes a polymer type micro-heat exchanger applicable to 272 BGA multi-chip module (MCM). Usually stacked MCM becomes easily overheated at low dissipated power due to the lack of heat path. To overcome this problem, we fabricated a polymer type micro-heat exchanger between chips. Normally, the heat exchanger is fabricated by high thermal conductive substrate such as metal, silicon, etc...

Filter options

Publication date

Set your own date range

INFONA - science communication portal

Search results for: Yongwon Jeong

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Publication type

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options