Title:
SOUND SIGNAL HIGH FREQUENCY COMPENSATION METHOD, SOUND SIGNAL POST-PROCESSING METHOD, SOUND SIGNAL DECODING METHOD, DEVICES THEREFOR, PROGRAM, AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2022/097244
Kind Code:
A1
Abstract:
An n-th channel compensated decoded sound signal ~X'n that is a signal obtained by compensating for high frequencies of an n-th channel refined decoded sound signal ~Xn obtained by performing signal processing in a time domain on an n-th channel decoded sound signal ^Xn obtained by decoding a stereo code CS is obtained on a frame-by-frame basis. On this occasion, if the number of bits bn corresponding to an n-th channel among the number of bits of CS is larger than the number of bits bM of a monaural code CM, ^Xn is selected, if bn is smaller than bM, a monaural decoded sound signal obtained by decoding CM or a signal obtained by upmixing the monaural decoded sound signal for use in the n-th channel is selected, an n-th channel high frequency compensation gain ρn that is a value for bringing the energy at high frequencies of ~X'n close to the energy at high frequencies of ^Xn is obtained, and a signal obtained by adding ~Xn and a signal obtained by multiplying a high-frequency component of the selected signal by ρn is obtained as the n-th channel compensated decoded sound signal and outputted.
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Inventors:
SUGIURA RYOSUKE (JP)
MORIYA TAKEHIRO (JP)
KAMAMOTO YUTAKA (JP)
MORIYA TAKEHIRO (JP)
KAMAMOTO YUTAKA (JP)
Application Number:
PCT/JP2020/041407
Publication Date:
May 12, 2022
Filing Date:
November 05, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G10L19/008; G10L19/24; G10L21/0388
Domestic Patent References:
| WO2006070751A1 | 2006-07-06 | |||
| WO2010058518A1 | 2010-05-27 |
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
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