Basic, algorithm of pitch synchronous innovation CELP (PSI-CELP) speech coding

Satoshi Miki, Takehiro Moriya, Kazunori Mano, Hitoshi Ohmuro

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper describes a new speech coding method called PSI-CELP (Pitch Synchronous Innovation CELP). This method is based on CELP and adds pitch synchronous innovation, which means that even random codevectors are adaptively converted to have pitch periodicity for voiced frames. PSI-CELP is suitable for low bit-rate speech coding and it can considerably improve the quality of synthesized speech without increasing the computational complexity or the bit-rate. In addition to pitch synchronous innovation, four other methods are used for low bit-rate CELP : (1) a fixed codebook that is prepared as part of the adaptive codebook for nonperiodic frames, (2) a random codebook consisting of two conjugate sub-codebooks, (3) an MA-type perceptual weighting filter using unquantized LPC parameters, and, (4) codebook arches using delayed decision. PSI-CELP improves the SNR, segmental SNR, and equivalent Q value of the coding system by 1.6dB, 1.0dB, and 0.5dB respectively.

Original languageEnglish
Pages (from-to)363-372
Number of pages10
JournalNTT R and D
Volume43
Issue number4
Publication statusPublished - 1994
Externally publishedYes

Fingerprint

Speech coding
Innovation
Arches
Computational complexity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Basic, algorithm of pitch synchronous innovation CELP (PSI-CELP) speech coding. / Miki, Satoshi; Moriya, Takehiro; Mano, Kazunori; Ohmuro, Hitoshi.

In: NTT R and D, Vol. 43, No. 4, 1994, p. 363-372.

Research output: Contribution to journalArticle

Miki, S, Moriya, T, Mano, K & Ohmuro, H 1994, 'Basic, algorithm of pitch synchronous innovation CELP (PSI-CELP) speech coding', NTT R and D, vol. 43, no. 4, pp. 363-372.
Miki, Satoshi ; Moriya, Takehiro ; Mano, Kazunori ; Ohmuro, Hitoshi. / Basic, algorithm of pitch synchronous innovation CELP (PSI-CELP) speech coding. In: NTT R and D. 1994 ; Vol. 43, No. 4. pp. 363-372.
@article{df99f507b2394760a639f41327952d32,
title = "Basic, algorithm of pitch synchronous innovation CELP (PSI-CELP) speech coding",
abstract = "This paper describes a new speech coding method called PSI-CELP (Pitch Synchronous Innovation CELP). This method is based on CELP and adds pitch synchronous innovation, which means that even random codevectors are adaptively converted to have pitch periodicity for voiced frames. PSI-CELP is suitable for low bit-rate speech coding and it can considerably improve the quality of synthesized speech without increasing the computational complexity or the bit-rate. In addition to pitch synchronous innovation, four other methods are used for low bit-rate CELP : (1) a fixed codebook that is prepared as part of the adaptive codebook for nonperiodic frames, (2) a random codebook consisting of two conjugate sub-codebooks, (3) an MA-type perceptual weighting filter using unquantized LPC parameters, and, (4) codebook arches using delayed decision. PSI-CELP improves the SNR, segmental SNR, and equivalent Q value of the coding system by 1.6dB, 1.0dB, and 0.5dB respectively.",
author = "Satoshi Miki and Takehiro Moriya and Kazunori Mano and Hitoshi Ohmuro",
year = "1994",
language = "English",
volume = "43",
pages = "363--372",
journal = "NTT R and D",
issn = "0915-2326",
publisher = "Telecommunications Association",
number = "4",

}

TY - JOUR

T1 - Basic, algorithm of pitch synchronous innovation CELP (PSI-CELP) speech coding

AU - Miki, Satoshi

AU - Moriya, Takehiro

AU - Mano, Kazunori

AU - Ohmuro, Hitoshi

PY - 1994

Y1 - 1994

N2 - This paper describes a new speech coding method called PSI-CELP (Pitch Synchronous Innovation CELP). This method is based on CELP and adds pitch synchronous innovation, which means that even random codevectors are adaptively converted to have pitch periodicity for voiced frames. PSI-CELP is suitable for low bit-rate speech coding and it can considerably improve the quality of synthesized speech without increasing the computational complexity or the bit-rate. In addition to pitch synchronous innovation, four other methods are used for low bit-rate CELP : (1) a fixed codebook that is prepared as part of the adaptive codebook for nonperiodic frames, (2) a random codebook consisting of two conjugate sub-codebooks, (3) an MA-type perceptual weighting filter using unquantized LPC parameters, and, (4) codebook arches using delayed decision. PSI-CELP improves the SNR, segmental SNR, and equivalent Q value of the coding system by 1.6dB, 1.0dB, and 0.5dB respectively.

AB - This paper describes a new speech coding method called PSI-CELP (Pitch Synchronous Innovation CELP). This method is based on CELP and adds pitch synchronous innovation, which means that even random codevectors are adaptively converted to have pitch periodicity for voiced frames. PSI-CELP is suitable for low bit-rate speech coding and it can considerably improve the quality of synthesized speech without increasing the computational complexity or the bit-rate. In addition to pitch synchronous innovation, four other methods are used for low bit-rate CELP : (1) a fixed codebook that is prepared as part of the adaptive codebook for nonperiodic frames, (2) a random codebook consisting of two conjugate sub-codebooks, (3) an MA-type perceptual weighting filter using unquantized LPC parameters, and, (4) codebook arches using delayed decision. PSI-CELP improves the SNR, segmental SNR, and equivalent Q value of the coding system by 1.6dB, 1.0dB, and 0.5dB respectively.

UR - http://www.scopus.com/inward/record.url?scp=0028134445&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028134445&partnerID=8YFLogxK

M3 - Article

VL - 43

SP - 363

EP - 372

JO - NTT R and D

JF - NTT R and D

SN - 0915-2326

IS - 4

ER -