Vector Quantization of Speech Spectral Parameters Using Statistics of Static and Dynamic Features

元データ 2001-10-01 社団法人電子情報通信学会

概要

This paper proposes a vector quantization scheme which makes it possible to consider the dynamics of input vectors. In the proposed scheme, a linear transformation is applied to the consecutive input vectors and the resulting vector is quantized with a distortion measure defined by the statistics. At the decoder side, the output vector sequence is determined using the statistics associated with the transmitted indices in such a way that a likelihood is maximized. To solve the maximization problem, a computationally efficient algorithm is derived. The performance of the proposed method is evaluated in LSP parameter quantization. It is found that the LSP trajectories and the corresponding spectra change quite smoothly in the proposed method. It is also shown that the use of the proposed method results in a significant improvement of subjective quality.

著者

Masuko T Interdisciplinary Graduate School Of Science And Engineering Tokyo Institute Of Technology:(present
Masuko Takashi 近畿大学 薬学部細胞生物学
Tachibana Makoto Interdisciplinary Graduate School Of Science And Engineering Tokyo Institute Of Technology:(present
Masuko Takashi Laboratory Of Cell Biology School Of Pharmaceutical Sciences Kinki University
Masuko Takashi Departments Of Molecular Biology Pharmaceutical Institute Tohoku University
Masuko Takashi Department Of Agricultural And Biological Chemistry College Of Bioresource Sciences Nihon University
Tokuda K Department Of Computer Science And Engineering Nagoya Institute Of Technology
Masuko Takashi Tokyo Inst. Technol. Yokohama‐shi Jpn
KOBAYASHI Takao Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
KOISHIDA Kazuhito the Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
TOKUDA Keiichi the Department of Computer Science, Nagoya Institute of Technology
MASUKO Takashi the Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
KOBAYASHI Takao the Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
Kobayashi Takao Tokyo Inst. Technol. Yokohama‐shi Jpn
Tokuda Keiichi The Department Of Computer Science Nagoya Institute Of Technology
Tachibana Makoto Interdisciplinary Graduate School Of Science And Engineering Tokyo Institute Of Technology
Kobayashi T Interdisciplinary Graduate School Of Science And Engineering Tokyo Institute Of Technology
Matsuyama Taiji Department Of Pharmacy Shizuoka Kousei Hospital
Tokuda Keiichi Department Of Computer Science Naogya Institute Of Technology
Koishida Kazuhito The Interdisciplinary Graduate School Of Science And Engineering Tokyo Institute Of Technology:signa
Kobayashi Takao Department Of Obstetrics And Gynecology Hamamatsu University School Of Medicine

関連論文

▼もっと見る