Title:
SCALABLE DECODING APPARATUS AND SCALABLE ENCODING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2006/049205
Kind Code:
A1
Abstract:
A scalable decoding apparatus capable of providing decoded audio signals of high quality having less degradation of a high frequency spectrum even when decoding audio signals by generating the high frequency spectrum by use of a low frequency spectrum. In the apparatus, an amplitude adjusting part (1211) uses different adjustment coefficients in accordance with the characteristic of first layer spectrum information to adjust the amplitude of a first layer decoded signal spectrum, and then outputs the amplitude-adjusted first layer decoded signal spectrum to a pseudo-spectrum generating part (1012). Using amplitude-adjusted first layer decoded signal spectrum received from the amplitude adjusting part (1211), the pseudo-spectrum generating part (1012) generates and outputs a pseudo-spectrum of high frequencies to a scaling part (1013). The scaling part (1013) scales the spectrum received from the pseudo-spectrum generating part (1012) and then outputs it to an adder (B).
Inventors:
Ehara, Hiroyuki
Oshikiri, Masahiro
Yoshida, Koji
Oshikiri, Masahiro
Yoshida, Koji
Application Number:
PCT/JP2005/020201
Publication Date:
May 11, 2006
Filing Date:
November 02, 2005
Export Citation:
Assignee:
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 57185, JP)
Ehara, Hiroyuki
Oshikiri, Masahiro
Yoshida, Koji
Ehara, Hiroyuki
Oshikiri, Masahiro
Yoshida, Koji
International Classes:
G01L19/02; H03M7/30
Attorney, Agent or Firm:
Washida, Kimihito (5th Floor, Shintoshicenter Bldg. 24-1, Tsurumaki 1-chome, Tama-sh, Tokyo 34, 20600, JP)
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