Title:
ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD AND DECODING METHOD
Document Type and Number:
WIPO Patent Application WO/2011/132368
Kind Code:
A1
Abstract:
Disclosed is an encoding device capable of improving decoded signal quality, wherein encoding parameters are generated and processed by an encoding processing that takes the importance of auditory quality into consideration. In the device, a local search unit (302) conducts a local search on a plurality of sub-bands generated by dividing spectrum data, and calculates lattice vectors for the spectra in the plurality of sub-bands. A multi-rate indexing unit (303) uses the lattice vectors to perform multi-rate indexing on each of the sub-bands, and generates indexing information showing the results thereof. A band selection unit (304) determines certain sub-bands from amongst the plurality of sub-bands in a plurality of encoding layers as important sub-band groups for auditory quality, where these are: within a selection range of sub-bands wherein the total number of encoding bits allocated to each of the plurality of sub-bands in the indexing information is equal to or less than an already set value, and within a sub-band selection range with the highest total energy of each of the plurality of sub-bands.
Inventors:
YAMANASHI, Tomofumi (())
山梨智史 (())
山梨智史 (())
Application Number:
JP2011/001986
Publication Date:
October 27, 2011
Filing Date:
April 01, 2011
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)
YAMANASHI, Tomofumi (())
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)
YAMANASHI, Tomofumi (())
International Classes:
G10L19/02; H03M7/30
Attorney, Agent or Firm:
WASHIDA, Kimihito (8th Floor, Shinjuku First West Bldg.1-23-7, Nishi-Shinjuku, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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Claims: