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Title:
AUDIO-PROCESSING DEVICE, AUDIO-PROCESSING METHOD AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2011/114932
Kind Code:
A1
Abstract:
Disclosed is an audio-processing apparatus, an audio-processing method and program that suppress a delay or an increased computing amount when decoding when an audio signal, if a multi-channel audio signal is down-mixed and encoded. An inverse multiplexing unit (101) obtains encoded data multiplexed by a BC parameter. A non-correlated frequency and time conversion unit (102) IMDCT-transforms and IMDST-transforms a frequency spectral coefficient of a monaural signal (XM) obtained from the encoded data to generate a monaural signal (XM) that is a time-region signal, and a signal (XD') that is non-correlated to that monaural signal (XM). A stereo-synthesizing unit (103) generates a stereo signal by synthesizing the monaural signal (XM) and signal (XD') using the BC parameter. This can be applied, for example, to an audio-processing device that decodes down-mixed and encoded stereo signals.

Inventors:
TOGURI Yasuhiro (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
戸栗 康裕 (〒75 東京都港区港南1丁目7番1号 ソニー株式会社内 Tokyo, 〒1080075, JP)
SUZUKI Shiro (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
鈴木 志朗 (〒75 東京都港区港南1丁目7番1号 ソニー株式会社内 Tokyo, 〒1080075, JP)
MATSUMOTO Jun (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
Application Number:
JP2011/055293
Publication Date:
September 22, 2011
Filing Date:
March 08, 2011
Export Citation:
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Assignee:
SONY CORPORATION (1-7-1, Konan Minato-k, Tokyo 75, 〒1080075, JP)
ソニー株式会社 (〒75 東京都港区港南1丁目7番1号 Tokyo, 〒1080075, JP)
TOGURI Yasuhiro (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
戸栗 康裕 (〒75 東京都港区港南1丁目7番1号 ソニー株式会社内 Tokyo, 〒1080075, JP)
SUZUKI Shiro (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
鈴木 志朗 (〒75 東京都港区港南1丁目7番1号 ソニー株式会社内 Tokyo, 〒1080075, JP)
International Classes:
G10L19/00; H04S3/00
Attorney, Agent or Firm:
INAMOTO Yoshio et al. (711 Building 4F, 11-18 Nishi-Shinjuku 7-chome, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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Claims: