Title:
STEREO SIGNAL ENCODING DEVICE, STEREO SIGNAL DECODING DEVICE, STEREO SIGNAL ENCODING METHOD, AND STEREO SIGNAL DECODING METHOD
Document Type and Number:
WIPO Patent Application WO/2012/066727
Kind Code:
A1
Abstract:
Provided is a stereo signal encoding device that enables a lower bitrate without decreasing quality when applying an intermittent transmission technique to a stereo signal. The stereo signal encoding device (100) encodes a stereo signal comprising a first channel signal and a second channel signal. A stereo encoding unit (103) generates first stereo encoded data by encoding the stereo signal when the stereo signal of the current frame is an audio section A stereo DTX encoding unit (104) is a means for encoding the stereo signal when the stereo signal of the current frame is a non-audio section, and generates second stereo encoded data by encoding each of: a monaural signal spectral parameter that is a spectral parameter of a monaural signal generated using the first channel signal and the second channel signal; first channel signal information relating to the first channel signal; and second channel signal information relating to the second channel signal.
Inventors:
OSHIKIRI MASAHIRO
EHARA HIROYUKI
EHARA HIROYUKI
Application Number:
PCT/JP2011/005791
Publication Date:
May 24, 2012
Filing Date:
October 17, 2011
Export Citation:
Assignee:
PANASONIC CORP (JP)
OSHIKIRI MASAHIRO
EHARA HIROYUKI
OSHIKIRI MASAHIRO
EHARA HIROYUKI
International Classes:
G10L19/008; G10L19/02; G10L19/20; G10L19/22; G10L25/78; G10L25/84; H03M7/30
Foreign References:
| JP2007079483A | 2007-03-29 | |||
| JP2008503783A | 2008-02-07 | |||
| JP2007538281A | 2007-12-27 | |||
| JP2004535145A | 2004-11-18 | |||
| JP2005533271A | 2005-11-04 |
Other References:
BESSETTE B: "A WIDEBAND SPEECH AND AUDIO CODEC AT 16/24/32 KBIT/S USING HYBRID ACELP/TCX TECHNIQUES", SPEECH CODING PROCEEDINGS, 20 June 1999 (1999-06-20), pages 7 - 9
MAKINEN J: "Source signal based rate adaptation for GSM AMR speech codec", ITCC 2004, vol. 2, 5 April 2004 (2004-04-05), pages 308 - 313
VILLE PULKKI ET AL.: "Localization of Amplitude-Panned Virtual Sources I : Stereophonic Panning", AUDIO ENGINEERING SOCIETY, vol. 49, no. 9, September 2001 (2001-09-01), pages 739 - 752
BIN CHENG ET AL.: "PRINCIPLES AND ANALYSIS OF THE SQUEEZING APPROACH TO LOW BITRATE SPATIAL AUDIO CODING Acoustics, Speech and Signal Processing,", ICASSP 2007. IEEE INTERNATIONAL CONFERENCE ON, IEEE, April 2007 (2007-04-01), pages I-13 - 1-16
"AMR Speech Codec; Comfort noise aspects (Release 4)", 3GPP TS 26.092, vol. 4.0.0, May 2001 (2001-05-01)
MAKINEN J: "Source signal based rate adaptation for GSM AMR speech codec", ITCC 2004, vol. 2, 5 April 2004 (2004-04-05), pages 308 - 313
VILLE PULKKI ET AL.: "Localization of Amplitude-Panned Virtual Sources I : Stereophonic Panning", AUDIO ENGINEERING SOCIETY, vol. 49, no. 9, September 2001 (2001-09-01), pages 739 - 752
BIN CHENG ET AL.: "PRINCIPLES AND ANALYSIS OF THE SQUEEZING APPROACH TO LOW BITRATE SPATIAL AUDIO CODING Acoustics, Speech and Signal Processing,", ICASSP 2007. IEEE INTERNATIONAL CONFERENCE ON, IEEE, April 2007 (2007-04-01), pages I-13 - 1-16
"AMR Speech Codec; Comfort noise aspects (Release 4)", 3GPP TS 26.092, vol. 4.0.0, May 2001 (2001-05-01)
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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Claims: