Title:
ENCODING DEVICE AND METHOD, DECODING DEVICE AND METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2013/027630
Kind Code:
A1
Abstract:
The present technology pertains to an encoding device and method, decoding device and method, and program that are able to obtain high-quality audio at a lower code quantity. On the basis of the sub-band signal of a plurality of sub-bands configuring an input signal, a segment-count-determining feature quantity calculation circuit calculates a segment-count-determining feature quantity for determining the number of partitions to partition a segment to be processed into continuous frame segments comprising frames for which the same estimation coefficient has been selected. A quasi-high-range sub-band power difference calculation circuit determines the number of continuous frame segments in the segment to be processed on the basis of the segment-count-determining feature quantity, selects, for each continuous frame segment, an estimation coefficient for determining the high-range portion of the input signal by means of estimation, and generates data containing a coefficient index for obtaining the estimation coefficients. A high-range encoding circuit encodes the obtained data, and generates high-range encoded data. The present technology can be applied to an encoding device.
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Inventors:
YAMAMOTO YUKI (JP)
CHINEN TORU (JP)
CHINEN TORU (JP)
Application Number:
PCT/JP2012/070683
Publication Date:
February 28, 2013
Filing Date:
August 14, 2012
Export Citation:
Assignee:
SONY CORP (JP)
YAMAMOTO YUKI (JP)
CHINEN TORU (JP)
YAMAMOTO YUKI (JP)
CHINEN TORU (JP)
International Classes:
G10L19/02; G10L21/04; H03M7/30
Domestic Patent References:
| WO2011043227A1 | 2011-04-14 | |||
| WO2006049205A1 | 2006-05-11 |
Foreign References:
| JP2010079275A | 2010-04-08 | |||
| JP2007333785A | 2007-12-27 | |||
| JP2008139844A | 2008-06-19 | |||
| JP2010020251A | 2010-01-28 |
Other References:
See also references of EP 2750131A4
Attorney, Agent or Firm:
INAMOTO Yoshio et al. (JP)
Yoshio Inemoto (JP)
Yoshio Inemoto (JP)
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Claims: