Audio decoding device, decoding method, and program

Details Audio decoding device, decoding method, and program Audio decoding device, decoding method, and program

2003-06-24

2009-06-30

Vo, Huyen X. (Department: 2626)

Data processing: speech signal processing, linguistics, language

Audio signal bandwidth compression or expansion

C704S501000, C704S503000

Reexamination Certificate

active

07555434

ABSTRACT:
An energy corrector (105) for correcting a target energy for high-frequency components and a corrective coefficient calculator (106) for calculating an energy corrective coefficient from low-frequency subband signals are newly provided. These processors perform a process for correcting a target energy that is required when a band expanding process is performed on a real number only. Thus, a real subband combining filter and a real band expander which require a smaller amount of calculations can be used instead of a complex subband combining filter and a complex band expander, while maintaining a high sound-quality level, and the required amount of calculations and the apparatus scale can be reduced.

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