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Title:
CHANNEL SIGNAL GENERATION DEVICE, ACOUSTIC SIGNAL ENCODING DEVICE, ACOUSTIC SIGNAL DECODING DEVICE, ACOUSTIC SIGNAL ENCODING METHOD, AND ACOUSTIC SIGNAL DECODING METHOD
Document Type and Number:
WIPO Patent Application WO/2010/098120
Kind Code:
A1
Abstract:
Provided is a channel signal generation device capable of avoiding a decrease in the prediction performance for predicting an L channel signal and an R channel signal from a monaural signal and achieving encoding with high sound quality. In the device, a monaural MDCT coefficient corrector (301) generates a left channel change monaural MDCT coefficient and a right channel change monaural MDCT coefficient using a decoding monaural MDCT coefficient generated using a left channel signal and a right channel signal, which constitute an acoustic signal. More specifically, the monaural MDCT coefficient corrector (301) generates the left channel change monaural MDCT coefficient and the right channel change monaural MDCT coefficient by performing change processing for compensating for the phase difference between the left channel signal and the right channel signal on the decoding monaural MDCT coefficient according to inputted determination data.

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Inventors:
OSHIKIRI MASAHIRO
Application Number:
PCT/JP2010/001301
Publication Date:
September 02, 2010
Filing Date:
February 25, 2010
Export Citation:
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Assignee:
PANASONIC CORP (JP)
OSHIKIRI MASAHIRO
International Classes:
G10L19/02; G10L19/008
Domestic Patent References:
WO2006118178A12006-11-09
WO2006080358A12006-08-03
Foreign References:
JP2006518482A2006-08-10
JP2004535145A2004-11-18
JP2005533271A2005-11-04
JP2009044806A2009-02-26
Other References:
V. PULKKI, M. KARJALAINEN: "Localization of amplitude-panned virtual sources I: Stereophonic panning", JOURNAL OF THE AUDIO ENGINEERING SOCIETY, vol. 49, no. 9, 9 September 2001 (2001-09-09), pages 739 - 752
B. CHENG, C. RITZ, I. BURNETT: "Principles and analysis of the squeezing approach to low bit rate spatial audio coding", PROC. IEEE ICASS P2007, April 2007 (2007-04-01), pages 1 - 13,1-16
See also references of EP 2402941A4
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
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