Title:
DEVICE AND METHOD FOR EXPANDING FREQUENCY BAND, DEVICE AND METHOD FOR ENCODING, DEVICE AND METHOD FOR DECODING, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2010/024371
Kind Code:
A1
Abstract:
Disclosed are a device and a method for expanding a frequency band, a device and a method for encoding, a device and a method for decoding, and a program whereby a frequency band is expanded in order to enable a music signal to be reproduced with high sound quality. Band-pass filters (13) obtain multiple subbands from an input signal. A frequency envelope extraction circuit (14) extracts a frequency envelope from the multiple subband signals obtained by the multiple band-pass filters. A high-frequency signal generation circuit (15) generates a high-frequency signal element based on the frequency envelope obtained by the frequency envelope extraction circuit (14) and the multiple subband signals obtained by the band-pass filters (13). A frequency band expander (10) expands the frequency band of the input signal using the high-frequency signal element generated by the high-frequency signal generation circuit (15). The invention can be applied to a frequency band expander, an encoder, and a decoder, for example.
Inventors:
HONMA Hiroyuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
本間 弘幸 (〒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)
YAMAMOTO Yuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
本間 弘幸 (〒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)
YAMAMOTO Yuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
Application Number:
JP2009/065033
Publication Date:
March 04, 2010
Filing Date:
August 28, 2009
Export Citation:
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)
HONMA Hiroyuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
本間 弘幸 (〒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)
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)
HONMA Hiroyuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
本間 弘幸 (〒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)
International Classes:
G10L21/04
Attorney, Agent or Firm:
INAMOTO Yoshio (711 Building 4F, 11-18 Nishi-Shinjuku 7-chome, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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