Title:
ENCODING METHOD, DECODING METHOD, ENCODING DEVICE, DECODING DEVICE, PROGRAM AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2013/176177
Kind Code:
A1
Abstract:
A pitch period (L) of a time region corresponds to a time region pitch period code of an audio signal of a prescribed time zone. A sample interval of a frequency region corresponding to the pitch period (L) of the time region is obtained as a conversion interval (T1). A frequency region pitch period (T) is determined from candidate values including the conversion interval (T1) and values (U × T1) that are integral multiples of this conversion interval (T1). A frequency region pitch period code is obtained that indicates what multiple the frequency region pitch period (T) is of the conversion interval (T1). A frequency region pitch period code is output such as to make it possible for the frequency region pitch period (T) to be specified at the decoding end.
Inventors:
MORIYA TAKEHIRO (JP)
KAMAMOTO YUTAKA (JP)
HARADA NOBORU (JP)
HIWASAKI YUSUKE (JP)
FUKUI MASAHIRO (JP)
KAMAMOTO YUTAKA (JP)
HARADA NOBORU (JP)
HIWASAKI YUSUKE (JP)
FUKUI MASAHIRO (JP)
Application Number:
PCT/JP2013/064209
Publication Date:
November 28, 2013
Filing Date:
May 22, 2013
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G10L19/02
Foreign References:
| JP2002516420A | 2002-06-04 | |||
| JPH0792998A | 1995-04-07 | |||
| JP2002515610A | 2002-05-28 | |||
| JP2003216189A | 2003-07-30 | |||
| JP2005528647A | 2005-09-22 | |||
| JP2009156971A | 2009-07-16 |
Other References:
T. MORIYA; N. IWAKAMI; A. JIN; K. IKEDA; S. MIKI: "A Design of Transform Coder for Both Speech and Audio Signals at 1 bit/sample", PROC. ICASSP '97, 1997, pages 1371 - 1374, XP000822711, DOI: doi:10.1109/ICASSP.1997.596202
J. HERRE; E. ALLAMANCHE; K. BRANDENBURG; M. DIETZ; B. TEICHMANN; B. GRILL; A. JIN; T. MORIYA; N. IWAKAMI; T. NORIMATSU: "The Integrated Filterbank Based Scalable MPEG-4, Audio Coder", 105TH CONVENTION AUDIO ENGINEERING SOCIETY, 1998, pages 4810
See also references of EP 2830057A4
J. HERRE; E. ALLAMANCHE; K. BRANDENBURG; M. DIETZ; B. TEICHMANN; B. GRILL; A. JIN; T. MORIYA; N. IWAKAMI; T. NORIMATSU: "The Integrated Filterbank Based Scalable MPEG-4, Audio Coder", 105TH CONVENTION AUDIO ENGINEERING SOCIETY, 1998, pages 4810
See also references of EP 2830057A4
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
Naoki Nakao (JP)
Naoki Nakao (JP)
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