Title:
オーディオ信号の符号化方法、オーディオ信号の復号化方法及び記録媒体
Document Type and Number:
Japanese Patent JP5788833
Kind Code:
B2
Abstract:
A method and apparatus to extract an audio signal having an important spectral component (ISC) and a low bit-rate audio signal coding/decoding method using the method and apparatus to extract the ISC. The method of extracting the ISC includes calculating perceptual importance including an SMR (signal-to-mark ratio) value of transformed spectral audio signals by using a psychoacoustic model, selecting spectral signals having a masking threshold value smaller than that of the spectral audio signals using the SMR value as first ISCs, and extracting a spectral peak from the audio signals selected as the ISCs according to a predetermined weighting factor to select second ISCs. Accordingly, the perceptual important spectral components can be efficiently coded so as to obtain high sound quality at a low bit-rate. In addition, it is possible to extract the perceptual important spectral component by using the psychoacoustic model, to perform coding without phase information, and to efficiently represent a spectral signal at a low bit-rate. In addition, the methods and apparatus can be employed in all the applications requiring a low bit-rate audio coding scheme and in a next generation audio scheme.
Inventors:
Kim, jun-fe
Oh, Eun-mi
Ozipov, Constantine
Kudryashov, Boris
Oh, Eun-mi
Ozipov, Constantine
Kudryashov, Boris
Application Number:
JP2012118574A
Publication Date:
October 07, 2015
Filing Date:
May 24, 2012
Export Citation:
Assignee:
Samsung Electronics Company Limited
International Classes:
G10L19/035; G10L19/00
Domestic Patent References:
| JP10301594A | ||||
| JP9214346A | ||||
| JP7183818A | ||||
| JP8256064A | ||||
| JP2000505266A |
Foreign References:
| WO2003107328A1 |
Other References:
Tony S.Verma, et al.,"A 6KBPS TO 85KBPS SCALABLE AUDIO CODER",Proceedings of the 2000 IEEE International Conference on Acoustics, Speech and Signal Processing(ICASSP'00),2000年 6月,Vol.II,pp.877-880
Renat Vafin, et al.,"Exploiting time and frequency masking in consistent sinusoidal analysis-synthesis",Proceedings of the 2000 IEEE International Conference on Acoustics, Speech and Signal Processing(ICASSP'00),2000年 6月,Vol.II,pp.901-904
Renat Vafin, et al.,"Exploiting time and frequency masking in consistent sinusoidal analysis-synthesis",Proceedings of the 2000 IEEE International Conference on Acoustics, Speech and Signal Processing(ICASSP'00),2000年 6月,Vol.II,pp.901-904
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Tadahiko Ito
Shinsuke Onuki