Title:
復号装置および方法、並びにプログラム
Document Type and Number:
Japanese Patent JP5754899
Kind Code:
B2
Abstract:
The present invention relates to a frequency band extending device and method, an encoding device and method, a decoding device and method, and a program, whereby music signals can be played with higher sound quality due to the extension of frequency bands.A bandpass filter 13 divides an input signal into multiple sub-band signals, a feature amount calculating circuit 14 calculates feature amount using at least one of the multiple divided sub-band signals and the input signal, a high frequency sub-band power estimating circuit 15 calculates an estimated value of a high frequency sub-band power based on the calculated feature amount, a high frequency signal generating circuit 16 generates a high frequency signal component based on the multiple sub-band signals divided by the bandpass filter 13, and the estimated value of the high frequency sub-band power calculated by the high frequency sub-band power estimating circuit 15. A frequency band extending device 10 extends the frequency band of the input signal using a high frequency signal component. The present invention may be applied to a frequency band extending device, for example.
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Inventors:
Yuki Yamamoto
Toru Chiken
Hiroyuki Homma
Yuuki Mitsuto
Toru Chiken
Hiroyuki Homma
Yuuki Mitsuto
Application Number:
JP2010162259A
Publication Date:
July 29, 2015
Filing Date:
July 16, 2010
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G10L21/057; G10L21/0388
Domestic Patent References:
| JP2007171821A | ||||
| JP2008139844A |
Attorney, Agent or Firm:
Takashi Nishikawa
Yoshio Inamoto
Yoshio Inamoto