BAND CORRECTING DEVICE

PROBLEM TO BE SOLVED: To solve the problem of the possibility of exceeding the maximum and minimum limitations in a digital signal processing area since band expansion is realized by amplifying again low-pass and high-pass components to raise the components to an audible level, and amplification of...

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Bibliographic Details
Main Authors TAKADA SHINSUKE, MURAKAMI YOSHIYA
Format Patent
LanguageEnglish
Published 24.09.2004
Edition7
Subjects
ACOUSTICS
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
MUSICAL INSTRUMENTS
PHYSICS
RESONATORS
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
TELEPHONIC COMMUNICATION
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Summary:PROBLEM TO BE SOLVED: To solve the problem of the possibility of exceeding the maximum and minimum limitations in a digital signal processing area since band expansion is realized by amplifying again low-pass and high-pass components to raise the components to an audible level, and amplification of components is directly reflected on amplitude amplification. SOLUTION: A band correcting device comprises one or a plurality of correcting means for correcting the signal level of a limited band of an input signal whose frequency band is limited, a monitoring means for for monitoring whether the signal level of an output signal of the correcting means reaches a prescribed level, and a coefficient control means for controlling a coefficient for level correction of the correcting means. Further, the band correcting device comprises a delaying means for adding delay identical to processing delay of the correcting means to a signal other than the limited area of the input signal whose frequency band is limited. COPYRIGHT: (C)2004,JPO&NCIPI
Bibliography:Application Number: JP20030050832