Title:
FREQUENCY BAND ENLARGING APPARATUS AND METHOD, ENCODING APPARATUS AND METHOD, DECODING APPARATUS AND METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2011/043227
Kind Code:
A1
Abstract:
A frequency band enlarging apparatus and method, an encoding apparatus and method, a decoding apparatus and method, and a program wherein the frequency band is enlarged, thereby reproducing music signals with higher sound quality achieved. A bandpass filter (13) divides an input signal into a plurality of subband signals. A characteristic amount calculating circuit (14) uses the plurality of subband signals as divided and/or the input signal to calculate a characteristic amount. A high frequency band subband power estimating circuit (15) calculates, based on the calculated characteristic amount, the estimation values of high frequency band subband powers. A high frequency band signal generating circuit (16) generates a high frequency band signal component on the basis of the plurality of subband signals as divided by the bandpass filter (13) and the estimation values of high frequency band subband powers calculated by the high frequency band subband power estimating circuit (15). The frequency band enlarging apparatus (10) uses the high frequency band signal component to enlarge the frequency band of the input signal. This invention is applicable to, for example, a frequency band enlarging apparatus.
Inventors:
YAMAMOTO Yuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
山本 優樹 (〒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)
CHINEN Toru (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
知念 徹 (〒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)
山本 優樹 (〒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)
CHINEN Toru (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
知念 徹 (〒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)
Application Number:
JP2010/066882
Publication Date:
April 14, 2011
Filing Date:
September 29, 2010
Export Citation:
Assignee:
SONY CORPORATION (1-7-1, Konan Minato-ku 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)
YAMAMOTO Yuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
山本 優樹 (〒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)
CHINEN Toru (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)
YAMAMOTO Yuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
山本 優樹 (〒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)
CHINEN Toru (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
International Classes:
G10L21/04; G10L19/02; H03M7/30
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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