Title:
HIGH BAND COMPONENT RESTORING DEVICE
Document Type and Number:
Japanese Patent JPH0685607
Kind Code:
A
Abstract:
PURPOSE: To restore the high band component omitted from an original audio signal.
CONSTITUTION: The frequency of an original audio signal is analyzed by a frequency analyzing part 16. Then a tone color component including a pair of a fundamental tone and a harmonic is extracted out of the original audio signal band by an extracting part 18 based on the analyzing result of the part 16. Then an extrapolation means 30 estimates the harmonic component of a high band from the original audio signal band and extrapolates the harmonic component into the original audio signal with use of the tone color component extracted by the part 18.
Inventors:
YOKOTA HACHIRO
Application Number:
JP23120592A
Publication Date:
March 25, 1994
Filing Date:
August 31, 1992
Export Citation:
Assignee:
ALPINE ELECTRONICS INC
International Classes:
H03H17/00; H03H17/02; (IPC1-7): H03H17/02
Attorney, Agent or Firm:
Chika Saito
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