Design of a robust LSP quantizer for a high-quality 4-kbit/s CELP speech coder

Yusuke Hiwasaki, Kazunori Mano, Kazutoshi Yasunaga, Toshiyuki Morii, Hiroyuki Ehara, Takao Kaneko

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper presents an efficient LSP quantizer implementation for low bit-rate coders. The major feature of the quantizer is that it uses a truncated cepstral distance criterion for the code selection procedure. This approach has generally been considered too computationally costly. We utilized the quantizer with a moving-average predictor, two-stage-split vector quantizer and delayed decision. We have investigated the optimal parameter settings in this case and incorporated the quantizer thus obtained into an ITU-T 4-kbit/s speech coding candidate algorithm with a bit budget of 21 bits. The objective performance is better than that with a conventional weighted mean-square criterion, while the complexity is still kept to a reasonable level. The paper also describes the codebook design and techniques that were employed to achieve robustness in noisy channel conditions.

Original languageEnglish
Pages (from-to)1496-1506
Number of pages11
JournalIEICE Transactions on Information and Systems
VolumeE87-D
Issue number6
Publication statusPublished - 2004 Jun
Externally publishedYes

Fingerprint

Speech coding

Keywords

  • Line spectral frequencies
  • Line spectrum pairs
  • Spectral quantization
  • Speech coding
  • Split vector quantization

ASJC Scopus subject areas

  • Information Systems
  • Computer Graphics and Computer-Aided Design
  • Software

Cite this

Hiwasaki, Y., Mano, K., Yasunaga, K., Morii, T., Ehara, H., & Kaneko, T. (2004). Design of a robust LSP quantizer for a high-quality 4-kbit/s CELP speech coder. IEICE Transactions on Information and Systems, E87-D(6), 1496-1506.

Design of a robust LSP quantizer for a high-quality 4-kbit/s CELP speech coder. / Hiwasaki, Yusuke; Mano, Kazunori; Yasunaga, Kazutoshi; Morii, Toshiyuki; Ehara, Hiroyuki; Kaneko, Takao.

In: IEICE Transactions on Information and Systems, Vol. E87-D, No. 6, 06.2004, p. 1496-1506.

Research output: Contribution to journalArticle

Hiwasaki, Y, Mano, K, Yasunaga, K, Morii, T, Ehara, H & Kaneko, T 2004, 'Design of a robust LSP quantizer for a high-quality 4-kbit/s CELP speech coder', IEICE Transactions on Information and Systems, vol. E87-D, no. 6, pp. 1496-1506.
Hiwasaki, Yusuke ; Mano, Kazunori ; Yasunaga, Kazutoshi ; Morii, Toshiyuki ; Ehara, Hiroyuki ; Kaneko, Takao. / Design of a robust LSP quantizer for a high-quality 4-kbit/s CELP speech coder. In: IEICE Transactions on Information and Systems. 2004 ; Vol. E87-D, No. 6. pp. 1496-1506.
@article{c8800a8e465e470a894536e97e287d42,
title = "Design of a robust LSP quantizer for a high-quality 4-kbit/s CELP speech coder",
abstract = "This paper presents an efficient LSP quantizer implementation for low bit-rate coders. The major feature of the quantizer is that it uses a truncated cepstral distance criterion for the code selection procedure. This approach has generally been considered too computationally costly. We utilized the quantizer with a moving-average predictor, two-stage-split vector quantizer and delayed decision. We have investigated the optimal parameter settings in this case and incorporated the quantizer thus obtained into an ITU-T 4-kbit/s speech coding candidate algorithm with a bit budget of 21 bits. The objective performance is better than that with a conventional weighted mean-square criterion, while the complexity is still kept to a reasonable level. The paper also describes the codebook design and techniques that were employed to achieve robustness in noisy channel conditions.",
keywords = "Line spectral frequencies, Line spectrum pairs, Spectral quantization, Speech coding, Split vector quantization",
author = "Yusuke Hiwasaki and Kazunori Mano and Kazutoshi Yasunaga and Toshiyuki Morii and Hiroyuki Ehara and Takao Kaneko",
year = "2004",
month = "6",
language = "English",
volume = "E87-D",
pages = "1496--1506",
journal = "IEICE Transactions on Information and Systems",
issn = "0916-8532",
publisher = "Maruzen Co., Ltd/Maruzen Kabushikikaisha",
number = "6",

}

TY - JOUR

T1 - Design of a robust LSP quantizer for a high-quality 4-kbit/s CELP speech coder

AU - Hiwasaki, Yusuke

AU - Mano, Kazunori

AU - Yasunaga, Kazutoshi

AU - Morii, Toshiyuki

AU - Ehara, Hiroyuki

AU - Kaneko, Takao

PY - 2004/6

Y1 - 2004/6

N2 - This paper presents an efficient LSP quantizer implementation for low bit-rate coders. The major feature of the quantizer is that it uses a truncated cepstral distance criterion for the code selection procedure. This approach has generally been considered too computationally costly. We utilized the quantizer with a moving-average predictor, two-stage-split vector quantizer and delayed decision. We have investigated the optimal parameter settings in this case and incorporated the quantizer thus obtained into an ITU-T 4-kbit/s speech coding candidate algorithm with a bit budget of 21 bits. The objective performance is better than that with a conventional weighted mean-square criterion, while the complexity is still kept to a reasonable level. The paper also describes the codebook design and techniques that were employed to achieve robustness in noisy channel conditions.

AB - This paper presents an efficient LSP quantizer implementation for low bit-rate coders. The major feature of the quantizer is that it uses a truncated cepstral distance criterion for the code selection procedure. This approach has generally been considered too computationally costly. We utilized the quantizer with a moving-average predictor, two-stage-split vector quantizer and delayed decision. We have investigated the optimal parameter settings in this case and incorporated the quantizer thus obtained into an ITU-T 4-kbit/s speech coding candidate algorithm with a bit budget of 21 bits. The objective performance is better than that with a conventional weighted mean-square criterion, while the complexity is still kept to a reasonable level. The paper also describes the codebook design and techniques that were employed to achieve robustness in noisy channel conditions.

KW - Line spectral frequencies

KW - Line spectrum pairs

KW - Spectral quantization

KW - Speech coding

KW - Split vector quantization

UR - http://www.scopus.com/inward/record.url?scp=3042640149&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=3042640149&partnerID=8YFLogxK

M3 - Article

VL - E87-D

SP - 1496

EP - 1506

JO - IEICE Transactions on Information and Systems

JF - IEICE Transactions on Information and Systems

SN - 0916-8532

IS - 6

ER -