Title:
ENCODING DEVICE, DECODING DEVICE AND METHODS THEREFOR
Document Type and Number:
WIPO Patent Application WO/2011/045927
Kind Code:
A1
Abstract:
Disclosed is an encoding device, wherein the energy information of a given layer is efficiently encoded using a scalable encoding method in which the band to be encoded is selected in each layer, and the quality of decoded signals can be enhanced. An encoding device (101) is equipped with: a second layer encoding unit (205) which selects from among a plurality of sub-bands, the frequency regions of which are divided, a first band to be quantized in a first layer differential spectrum as a first input signal, and generates a second layer encoded information included in which is the first band information of said band; a second layer decoding unit (206) which generates a first decoding signal by using the second layer encoded information; an adding unit (207) which generates a second layer differential spectrum as a second input signal by using the first input signal and the first decoding signal; and a third layer encoding unit (208) which generates a third layer encoded information included in which is a second band information obtained by selecting a second band to be quantized in the second input signal, and a gain (energy information) which was corrected by using the first band information and the second band information.
Inventors:
YAMANASHI TOMOFUMI
Application Number:
PCT/JP2010/006088
Publication Date:
April 21, 2011
Filing Date:
October 13, 2010
Export Citation:
Assignee:
PANASONIC CORP (JP)
YAMANASHI TOMOFUMI
YAMANASHI TOMOFUMI
International Classes:
G10L19/24; H03M7/30
Foreign References:
| US20080027718A1 | 2008-01-31 | |||
| JP2008519991A | 2008-06-12 | |||
| JP2009237684A | 2009-10-15 |
Other References:
HIROYUKI EHARA ET AL.: "Development of 32kbit/s scalable wide-band speech and audio coding algorithm using high-efficiency code-excited linear prediction and band-selective modified discrete cosine transform coding algorithms", JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN, 1 April 2008 (2008-04-01), pages 196 - 207, XP008162599
See also references of EP 2490217A4
AKIO KAMI ET AL.: "Scalable Audio Coding Based on Hierarchical Transform Coding Modules", TRANSACTION OF INSTITUTE OF ELECTRONICS AND COMMUNICATION ENGINEERS OF JAPAN, A, vol. J83-A, no. 3, March 2000 (2000-03-01), pages 241 - 252
See also references of EP 2490217A4
AKIO KAMI ET AL.: "Scalable Audio Coding Based on Hierarchical Transform Coding Modules", TRANSACTION OF INSTITUTE OF ELECTRONICS AND COMMUNICATION ENGINEERS OF JAPAN, A, vol. J83-A, no. 3, March 2000 (2000-03-01), pages 241 - 252
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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