Audio signal processing device, signal recovering device, audio signal processing method and signal recovering method
First Claim
1. An audio signal processing device, comprising:
- a subband extracting means for generating a subband signal that expresses a time-varying-strength of a basic frequency composition and a higher harmonic composition of an audio signal of a processing object that expresses a waveform of an audio sound; and
a deleting means for generating a deleted subband signal that expresses a result of deleting a portion expressing a time-varying higher harmonic composition of a deleting object that is made corresponding to the audio sound in the subband band signal generated by the subband extracting means,wherein a corresponding relationship between each audio sound made by a specific speaker and the higher harmonic composition of the deleting object made correspond to the audio sound is possessed by the corresponding specific speaker,wherein the deleting means rewritably stores a table that expresses the corresponding relationship and generates the deleted subband signal according to the corresponding relationship that is expressed by the table stored by itself.
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Accused Products
Abstract
The pitch extracting part generates a pitch waveform signal in a manner making the time interval of the pitch of the input audio sound data to be the same. After the number of samples in each region is made to be the same by the re-sampling part, the pitch waveform signal is changed into a subband data that express a time-varying-strength of a basic frequency composition and a higher harmonic composition by the subband analyzing part. The subband data are superimposed by a modulation wave composition that expresses attaching data of an attaching object by the data attaching part and is regarded as a bit stream to output through a nonlinear quantizing. A portion expressing the higher harmonic composition that is made corresponding to the audio sound expressed by this audio sound data in the subband data are deleted by the encoding part.
11 Citations
6 Claims
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1. An audio signal processing device, comprising:
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a subband extracting means for generating a subband signal that expresses a time-varying-strength of a basic frequency composition and a higher harmonic composition of an audio signal of a processing object that expresses a waveform of an audio sound; and a deleting means for generating a deleted subband signal that expresses a result of deleting a portion expressing a time-varying higher harmonic composition of a deleting object that is made corresponding to the audio sound in the subband band signal generated by the subband extracting means, wherein a corresponding relationship between each audio sound made by a specific speaker and the higher harmonic composition of the deleting object made correspond to the audio sound is possessed by the corresponding specific speaker, wherein the deleting means rewritably stores a table that expresses the corresponding relationship and generates the deleted subband signal according to the corresponding relationship that is expressed by the table stored by itself.
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2. An audio signal processing device, comprising:
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a subband extracting means for generating a subband signal that expresses a time-varying-strength of a basic frequency composition and a higher harmonic composition of an audio signal of a processing object that expresses a waveform of an audio sound; and a deleting means for generating a deleted subband signal that expresses a result of deleting a portion expressing a time-varying higher harmonic composition of a deleting object that is made corresponding to the audio sound in the subband band signal generated by the subband extracting means, wherein a corresponding relationship between each audio sound made by a specific speaker and the higher harmonic composition of the deleting object made correspond to the audio sound is possessed by the corresponding specific speaker, wherein the deleting means generates the deleted subband signal that expresses the result of deleting the portion expressing the time-varying higher harmonic composition of the deleting object that is made corresponding to the audio sound in a linearly quantized one that is a linear quantization of the filtered subband signal. - View Dependent Claims (3)
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4. An audio signal processing device, comprising:
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a subband extracting means for generating a subband signal that expresses a time-varying-strength of a basic frequency composition and a higher harmonic composition of an audio signal of a processing object that expresses a waveform of an audio sound; a deleting means for generating a deleted subband signal that expresses a result of deleting a portion expressing a time-varying higher harmonic composition of a deleting object that is made corresponding to the audio sound in the subband band signal generated by the subband extracting means, wherein a corresponding relationship between each audio sound made by a specific speaker and the higher harmonic composition of the deleting object made correspond to the audio sound is possessed by the corresponding specific speaker; and a removing means for specifying a portion that expresses a fricative in the audio signal of the processing object and removing the specified portion out of an object that deletes a portion expressing a time-varying higher harmonic composition of the deleting object.
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5. An audio signal processing device, comprising:
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a subband extracting means for generating a subband signal that expresses a time-varying-strength of a basic frequency composition and a higher harmonic composition of an audio signal of a processing object that expresses a waveform of an audio sound; a deleting means for generating a deleted subband signal that expresses a result of deleting a portion expressing a time-varying higher harmonic composition of a deleting object that is made corresponding to the audio sound in the subband band signal generated by the subband extracting means, wherein a corresponding relationship between each audio sound made by a specific speaker and the higher harmonic composition of the deleting object made correspond to the audio sound is possessed by the corresponding specific speaker; and a pitch waveform signal generating means for obtaining the audio signal of the processing object and processing the audio signal into a pitch waveform signal by making the time interval of the region correspond to the unit pitch of the audio signal, wherein the subband extracting means generates the subband signal according to the pitch waveform signal. - View Dependent Claims (6)
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Specification