Title:
AUDIO ENCODING DEVICE AND AUDIO ENCODING METHOD
Document Type and Number:
WIPO Patent Application WO/2011/080916
Kind Code:
A1
Abstract:
Disclosed is an audio encoding device which removes unnecessary inter-channel parameters from the subject to be encoded, improving the encoding efficiency thereby. In this audio encoding device, a principal component analysis unit (301) converts an inputted left signal {Lsb(f)} and an inputted right signal {Rsb(f)} into a principal component signal {PCsb(f)} and an ambient signal {Asb(f)} and calculates for each sub-band, a rotation angle which indicates the degree of conversion; a monophonic encoding unit (303) encodes the principal component signal {Pcsb(f)}; a rotation angle encoding unit (302) encodes the angle of rotation {θsb}; a local monophonic decoding unit (603) creates a decoded principal component signal so that the encoding quality of the principal component signal can be recognized on the encoding side; a redundant parameter elimination unit (604) identifies the redundant parameters by analyzing the encoding quality of the decoded principal component signal and eliminates the redundant parameters from the signal to be encoded; and a multiplexing unit (306) multiplexes the encoding parameters for the principal component signal {PCsb(f)} and the rotation angle encoding parameter and sends the bit stream to the decoder.
Inventors:
LIU, Zongxian (())
リウゾンシアン (())
リウゾンシアン (())
Application Number:
JP2010/007553
Publication Date:
July 07, 2011
Filing Date:
December 27, 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)
LIU, Zongxian (())
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)
LIU, Zongxian (())
International Classes:
G10L19/00
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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