Electrical audio signal processing systems and devices – Including frequency control
Reexamination Certificate
2003-08-27
2010-02-23
Mei, Xu (Department: 2614)
Electrical audio signal processing systems and devices
Including frequency control
C381S061000
Reexamination Certificate
active
07668319
ABSTRACT:
The present invention relates to a signal processing system, a signal processing apparatus and method, a recording medium, and a program in which high frequency components of a narrow-range signal having suppressed high frequency components can be restored with high accuracy. A narrow-range audio signal having low frequency components is divided into frames by a frame-unit dividing unit11, and is spectral-transformed into a signal on a frequency domain by a DCT transform unit12. A learning-produced-data table14extracts, at an address corresponding to a class code supplied from a classifying unit13, high-frequency-component DCT spectrum data. In a spectrum combining unit16, the extracted high-frequency-component DCT spectrum data is combined with low-frequency-component DCT spectrum data output from the DCT transform unit12. Subsequently, a broad-range audio signal having combined high frequency components and low frequency components is output. The present invention can be applied to cellular phones.
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Arimitsu Akihiko
Hattori Masaaki
Kimura Hiroto
Kondo Tetsujiro
Watanabe Tsutomu
Frommer William S.
Frommer & Lawrence & Haug LLP
Mei Xu
Presson Thomas F.
Sony Corporation
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