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:
JP2010/006088
Publication Date:
April 21, 2011
Filing Date:
October 13, 2010
Export Citation:
Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
International Classes:
G10L19/02; G10L19/14; H03M7/30
Attorney, Agent or Firm:
WASHIDA, Kimihito (5th Floor, Shintoshicenter Bldg. 24-1, Tsurumaki 1-chome, Tama-sh, Tokyo 34, 〒2060034, JP)
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