• Title/Summary/Keyword: input-output matrix

Search Result 442, Processing Time 0.024 seconds

Parts-Based Feature Extraction of Spectrum of Speech Signal Using Non-Negative Matrix Factorization

  • Park, Jeong-Won;Kim, Chang-Keun;Lee, Kwang-Seok;Koh, Si-Young;Hur, Kang-In
    • Journal of information and communication convergence engineering
    • /
    • v.1 no.4
    • /
    • pp.209-212
    • /
    • 2003
  • In this paper, we proposed new speech feature parameter through parts-based feature extraction of speech spectrum using Non-Negative Matrix Factorization (NMF). NMF can effectively reduce dimension for multi-dimensional data through matrix factorization under the non-negativity constraints, and dimensionally reduced data should be presented parts-based features of input data. For speech feature extraction, we applied Mel-scaled filter bank outputs to inputs of NMF, than used outputs of NMF for inputs of speech recognizer. From recognition experiment result, we could confirm that proposed feature parameter is superior in recognition performance than mel frequency cepstral coefficient (MFCC) that is used generally.

Parts-based Feature Extraction of Speech Spectrum Using Non-Negative Matrix Factorization (Non-Negative Matrix Factorization을 이용한 음성 스펙트럼의 부분 특징 추출)

  • 박정원;김창근;허강인
    • Proceedings of the IEEK Conference
    • /
    • 2003.11a
    • /
    • pp.49-52
    • /
    • 2003
  • In this paper, we propose new speech feature parameter using NMf(Non-Negative Matrix Factorization). NMF can represent multi-dimensional data based on effective dimensional reduction through matrix factorization under the non-negativity constraint, and reduced data present parts-based features of input data. In this paper, we verify about usefulness of NMF algorithm for speech feature extraction applying feature parameter that is got using NMF in Mel-scaled filter bank output. According to recognition experiment result, we could confirm that proposal feature parameter is superior in recognition performance than MFCC(mel frequency cepstral coefficient) that is used generally.

  • PDF

Robust $L_2$Optimization for Uncertain Systems

  • Kim, Kyung-Soo;Park, Youngjin
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 1995.10a
    • /
    • pp.348-351
    • /
    • 1995
  • This note proposes a robust LQR method for systems with structured real parameter uncertainty based on Riccati equation approach. Emphasis is on the reduction of design conservatism in the sense of quadratic performance by utilizing the uncertainty structure. The class of uncertainty treated includes all the form of additive real parameter uncertainty, which has the multiple rank structure. To handle the structure of uncertainty, the scaling matrix with block diagonal structure is introduced. By changing the scaling matrix, all the possible set of uncertainty structures can be represented. Modified algebraic Riccati equation (MARE) is newly proposed to obtain a robust feedback control law, which makes the quadratic cost finite for an arbitrary scaling matrix. The remaining design freedom, that is, the scaling matrix is used for minimizing the upper bound of the quadratic cost for all possible set of uncertainties within the given bounds. A design example is shown to demonstrate the simplicity and the effectiveness of proposed method.

  • PDF

Multi-Step Commutation and Control Policies for Matrix Converters

  • Hofmann, Wilfried;Ziegler, Marcus
    • Journal of Power Electronics
    • /
    • v.3 no.1
    • /
    • pp.24-32
    • /
    • 2003
  • The commutation and control in matrix converters is more complicated as in voltage source converters. Natural freewheeling paths do not exist and the theoretic absent storage elements result in a direct coupled system of load and line currents as well as voltages. The paper offers an overview about staggered commutation and control policies in matrix converters. Based on the knowledge about load current direction and the signs of the line to line input voltages different multi-step commutation policies were derived. This paper examines the application of that policies in the case of space vector modulation and direct control methods with the focus on the resulting effects to the reference output voltage deviation.

Quasi-Orthogonal Space-Time Block Codes Designs Based on Jacket Transform

  • Song, Wei;Lee, Moon-Ho;Matalgah, Mustafa M.;Guo, Ying
    • Journal of Communications and Networks
    • /
    • v.12 no.3
    • /
    • pp.240-245
    • /
    • 2010
  • Jacket matrices, motivated by the complex Hadamard matrix, have played important roles in signal processing, communications, image compression, cryptography, etc. In this paper, we suggest a novel approach to design a simple class of space-time block codes (STBCs) to reduce its peak-to-average power ratio. The proposed code provides coding gain due to the characteristics of the complex Hadamard matrix, which is a special case of Jacket matrices. Also, it can achieve full rate and full diversity with the simple decoding. Simulations show the good performance of the proposed codes in terms of symbol error rate. For generality, a kind of quasi-orthogonal STBC may be similarly designed with the improved performance.

The Hangul Printer by Dot Matrix (Dot Matrix 한글프린터에 관한 연구)

  • 김봉열;유황빈
    • Journal of the Korean Institute of Telematics and Electronics
    • /
    • v.14 no.3
    • /
    • pp.12-17
    • /
    • 1977
  • Above all computerization of Hangul composite printing is an urgent task for the effective utilization of computer as a useful mean handling information in this information flooded era. However it is a very difficult problems due to the unique mechanism of the Hangul character combination. There in this paper 13$\times$14 Dot Matrix processing method is applied to get a fine result of the Hangul out look. Further more Hangul input/output data processing is accomplished by the software program developed.

  • PDF

A Fault Tolerant Strategy Based on Model Predictive Control for Full Bidirectional Switches Indirect Matrix Converter

  • Le, Van-Tien;Lee, Hong-Hee
    • Proceedings of the KIPE Conference
    • /
    • 2019.07a
    • /
    • pp.74-76
    • /
    • 2019
  • This paper proposes an open-switch fault tolerant strategy based on the model predictive control for a full bidirectional switches indirect matrix converter (FBS-IMC). Compared to the conventional Indirect Matrix Converter (IMC), the FBS-IMC can provide healthy current path when open-switch fault is occurred. To keep the continuous operation, the fault tolerant strategy is developed by means of reversing the DC-link voltage polarity regardless of the faulty switch location in the rectifier or inverter stage. Therefore, the proposed control strategy can maintain the same input and output performances during the faulty condition as the normal condition. The simulation results are given to verify the effectiveness of the proposed strategy.

  • PDF

Feature Parameter Extraction and Speech Recognition Using Matrix Factorization (Matrix Factorization을 이용한 음성 특징 파라미터 추출 및 인식)

  • Lee Kwang-Seok;Hur Kang-In
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.10 no.7
    • /
    • pp.1307-1311
    • /
    • 2006
  • In this paper, we propose new speech feature parameter using the Matrix Factorization for appearance part-based features of speech spectrum. The proposed parameter represents effective dimensional reduced data from multi-dimensional feature data through matrix factorization procedure under all of the matrix elements are the non-negative constraint. Reduced feature data presents p art-based features of input data. We verify about usefulness of NMF(Non-Negative Matrix Factorization) algorithm for speech feature extraction applying feature parameter that is got using NMF in Mel-scaled filter bank output. According to recognition experiment results, we confirm that proposed feature parameter is superior to MFCC(Mel-Frequency Cepstral Coefficient) in recognition performance that is used generally.

Observer Based Output Feedback Control for Time-Delay Systems (시간지연 시스템의 관측기 기반의 출력 피드백 제어)

  • Lee, Sung-Ryul
    • Journal of the Institute of Electronics Engineers of Korea SC
    • /
    • v.48 no.3
    • /
    • pp.48-52
    • /
    • 2011
  • This paper presents the observer based output feedback control design for linear systems which have both input and output time delay. Sufficient conditions for existence of stabilizing output feedback controller are characterized by linear matrix inequalities. Since the condition of the proposed design depends on the value of time delay, it is less conservative than existing delay-independent approaches. Finally, an illustrative example is given in order to show the effectiveness of our design method.

Analysis of Technology Convergence Structure Using technology Input-output Analysis: Case of Convergence R&D Development Project for Small and Medium Businesses (기술연관분석을 활용한 기술융합구조 분석: 중소기업 융·복합기술개발사업 사례)

  • Lee, Kwang-Min;Kim, Da-Woon;Hong, Jae-Bum
    • Journal of Technology Innovation
    • /
    • v.22 no.3
    • /
    • pp.1-35
    • /
    • 2014
  • This study analyzed convergence status among input technologies used in technology development with Technology I-O analysis. It was another version of industry input-output analysis which is used in technology planning. This case is an analysis of association between technology an product. The subjects of analysis were 401 tasks that applied to '2012 Convergence Technology Development Project for Small and Medium Businesses' promoted by Korea Technology & Information Promotion Agency for Small and Medium Enterprises. The process of analysis is as followed. First step, we made a matrix table as an input of technology input-output analysis. Input was defined by technology and output was defined by the product. Input technology was defined in a 3-digit code under National Science Technology Classification and output products were defined in a 5-digit under National Standard Industry Code. Second, the Spillover ratio among technologies were calculated and was used to make a picture of technology linkage. As a result of analysis, technology spillover of embedded S/W was the highest in IT convergence, mold product in ET convergence, and functional cosmetics development technology in BT convergence. In general, IT convergence had many element technologies with high technology spillover, and ET had a small number of element technologies with high technology spillover. Therefore, investment effect of element technology is expected to be large if investment on element technologies with high technology spillover is important for vitalizing convergence.