Title:
CODING DEVICE AND METHOD, DECODING DEVICE AND METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2016/021412
Kind Code:
A1
Abstract:
This patent relates to a coding device and method, a decoding device and method, and a program which enable high-quality sound to be obtained even in an environment with small resources. A decomposition unit decomposes a supplied code string to obtain a quantized low-frequency spectrum, a spectral characteristic code, and a quantized extension coefficient. On this occasion, a single quantized extension coefficient or a quantized extension coefficient for each high-frequency band is included in the code string according to the spectral characteristic code. A spectrum inverse quantization unit inversely quantizes the quantized low-frequency spectrum to obtain a low-frequency spectrum, and an extension coefficient inverse quantization unit inversely quantizes the quantized extension coefficient to obtain an extension coefficient. An extended spectrum generation unit generates an extended spectrum on the basis of the low-frequency spectrum and the extension coefficient corresponding to the spectral characteristic code. An IMDCT unit generates a band-extended time-series signal from the low-frequency spectrum and the extended spectrum. This patent is applicable to a decoding device.
Inventors:
NISHIGORI SHUICHIRO (JP)
SUZUKI SHIRO (JP)
SUZUKI SHIRO (JP)
Application Number:
PCT/JP2015/070924
Publication Date:
February 11, 2016
Filing Date:
July 23, 2015
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
G10L21/0388; G10L19/02; H03M7/30
Foreign References:
| JP2013178546A | 2013-09-09 | |||
| JP2011248378A | 2011-12-08 |
Other References:
See also references of EP 3179476A4
Attorney, Agent or Firm:
NISHIKAWA Takashi et al. (JP)
Nishikawa 孝 (JP)
Nishikawa 孝 (JP)
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