TY - JOUR
T1 - A pitch synchronous innovation celp (PSI-CELP) coder for 2-4 kbit/s
AU - Miki, Satoshi
AU - Mano, Kazunori
AU - Moriya, Takehiro
AU - Oguchi, Kumiko
AU - Ohmuro, Hitoshi
N1 - Publisher Copyright:
© 1994 IEEE
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 1994
Y1 - 1994
N2 - This paper proposes high-quality and low bit-rate (3.6 and 2.4 kbit/s) coders using a Pitch Synchronous Innovation CELP (PSI-CELP) method or a phase adaptive PSI-CELP. PSI-CELP, which is used as the excitation structure of the half-rate codec for the standard of Japanese digital mobile telephony, is based on CELP but adds pitch synchronous innovation, which means that even random codevectors are adaptively converted to have pitch periodicity for voiced frames. Phase adaptive PSI-CELP makes not only the periodicity, like in PSI-CELP, but, also the phase of random codevectors equal to those of an adaptive codevector. The subjective qualities of the 3.6- and 2 . 4 kbit/s coders exceed those of the 6.7-kbit/s VSELP coder, which is the full-rate codec for the standard of Japanese digital mobile telephony, and the 4.8-kbit/s U.S. Federal Standard 1016 CELP coder, respectively, in the error-free condition.
AB - This paper proposes high-quality and low bit-rate (3.6 and 2.4 kbit/s) coders using a Pitch Synchronous Innovation CELP (PSI-CELP) method or a phase adaptive PSI-CELP. PSI-CELP, which is used as the excitation structure of the half-rate codec for the standard of Japanese digital mobile telephony, is based on CELP but adds pitch synchronous innovation, which means that even random codevectors are adaptively converted to have pitch periodicity for voiced frames. Phase adaptive PSI-CELP makes not only the periodicity, like in PSI-CELP, but, also the phase of random codevectors equal to those of an adaptive codevector. The subjective qualities of the 3.6- and 2 . 4 kbit/s coders exceed those of the 6.7-kbit/s VSELP coder, which is the full-rate codec for the standard of Japanese digital mobile telephony, and the 4.8-kbit/s U.S. Federal Standard 1016 CELP coder, respectively, in the error-free condition.
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U2 - 10.1109/ICASSP.1994.389705
DO - 10.1109/ICASSP.1994.389705
M3 - Conference article
AN - SCOPUS:85054262365
VL - 2
SP - II113-II116
JO - Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
JF - Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
SN - 0736-7791
M1 - 389705
T2 - Proceedings of the 1994 IEEE International Conference on Acoustics, Speech and Signal Processing. Part 2 (of 6)
Y2 - 19 April 1994 through 22 April 1994
ER -