Title:
SOUND SIGNAL ENCODING METHOD, SOUND SIGNAL DECODING METHOD, SOUND SIGNAL ENCODING DEVICE, SOUND SIGNAL DECODING DEVICE, PROGRAM, AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2021/181472
Kind Code:
A1
Abstract:
A downmixing unit 110 obtains a downmixed signal that is a signal obtained by mixing an inputted left channel input sound signal and an inputted right channel input sound signal. A left channel signal subtraction unit 130 and a right channel signal subtraction unit 150 respectively encode differences between the input sound signals and the products of the downmixed signal and subtraction gains regarding a left channel and a right channel. In the abovementioned configuration, a left channel subtraction gain estimation unit 120 and a right channel subtraction gain estimation unit 140 each determine the subtraction gain such that a quantization error caused by coding/decoding decreases.
Inventors:
SUGIURA RYOSUKE (JP)
MORIYA TAKEHIRO (JP)
KAMAMOTO YUTAKA (JP)
MORIYA TAKEHIRO (JP)
KAMAMOTO YUTAKA (JP)
Application Number:
PCT/JP2020/010080
Publication Date:
September 16, 2021
Filing Date:
March 09, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G10L19/008
Domestic Patent References:
| WO2010140350A1 | 2010-12-09 | |||
| WO2010097748A1 | 2010-09-02 |
Foreign References:
| JP2018533056A | 2018-11-08 | |||
| JP2011522472A | 2011-07-28 | |||
| JP2019536112A | 2019-12-12 | |||
| JP2010525403A | 2010-07-22 |
Other References:
BERNHARD GRILLBODO TEICHMANN: "Scalable Joint Stereo Coding", AES, 1998
"3GPP EVS Standards", 3GPP TS26.445
"3GPP EVS Standards", 3GPP TS26.445
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
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