Title:
ENCODING METHOD, DECODING METHOD, ENCODING DEVICE, DECODING DEVICE, PROGRAM, AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2012/137617
Kind Code:
A1
Abstract:
In an encoding process, a sample string of a frequency region derived from an acoustic signal is divided by a weighted envelope, the result divided by the gain is quantized, and each of the samples is subjected to variable-length encoding. The error between the sample prior to quantization and the sample after quantization is quantized using information saved by the variable-length encoding. A rule for determining which sample error to quantize is determined in accordance with the number of bits saved, and quantization is performed. In the decoding process, the variable-length code in the inputted code string is decoded and the sample string of the frequency region is obtained; the error signal is furthermore decoded following the rule corresponding to the number of bits in the variable-length code; and the original sample string is obtained from the obtained sample string on the basis of auxiliary information.
Inventors:
MORIYA TAKEHIRO (JP)
HARADA NOBORU (JP)
KAMAMOTO YUTAKA (JP)
HIWASAKI YUSUKE (JP)
FUKUI MASAHIRO (JP)
HARADA NOBORU (JP)
KAMAMOTO YUTAKA (JP)
HIWASAKI YUSUKE (JP)
FUKUI MASAHIRO (JP)
Application Number:
PCT/JP2012/057685
Publication Date:
October 11, 2012
Filing Date:
March 26, 2012
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
MORIYA TAKEHIRO (JP)
HARADA NOBORU (JP)
KAMAMOTO YUTAKA (JP)
HIWASAKI YUSUKE (JP)
FUKUI MASAHIRO (JP)
MORIYA TAKEHIRO (JP)
HARADA NOBORU (JP)
KAMAMOTO YUTAKA (JP)
HIWASAKI YUSUKE (JP)
FUKUI MASAHIRO (JP)
International Classes:
G10L19/00; G10L19/02; G10L19/035; H03M7/30
Domestic Patent References:
| WO2012046685A1 | 2012-04-12 |
Foreign References:
| JP2006011170A | 2006-01-12 | |||
| JPH03191628A | 1991-08-21 | |||
| JPH09214348A | 1997-08-15 | |||
| JPH0470800A | 1992-03-05 | |||
| JP2010225949A | 2010-10-07 |
Other References:
ETSI TS 126 290 V6.3.0, June 2005 (2005-06-01)
DAVID SALOMON: "Data Compression: The Complete Reference", 2004, SPRINGER-VERLAG
See also references of EP 2696343A4
DAVID SALOMON: "Data Compression: The Complete Reference", 2004, SPRINGER-VERLAG
See also references of EP 2696343A4
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
Naoki Nakao (JP)
Naoki Nakao (JP)
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Claims: