Speech signal processing system, speech signal processing method and speech signal processing method program using noise environment and volume of an input speech signal at a time point
First Claim
1. A speech signal processing system comprising:
- an input speech storage that stores an input speech signal;
a characteristic estimation unit that refers to the input speech signal stored in the input speech storage, and estimates characteristics of the input speech, the characteristics including an environmental sound included in the input speech signal, and the SN estimation unit obtains powers of the non-speech portion of the speech and a speech portion of the inputted speech signal and estimates an SN ratio;
a reference speech output that causes a predetermined speech signal that becomes a reference speech to be output;
a volume adjustment unit that adjusts the volume of the reference speech according to the SN ratio;
a characteristic adding unit that adds the estimated characteristics of the input speech, to the output reference speech signal of volume adjustment unit.
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Abstract
A speech signal processing system that includes a speech input unit for inputting a speech signal; input speech storage unit for storing an input speech signal that is the speech signal inputted through the speech input unit; characteristic estimation unit for referring to the input speech signal stored in the input speech storage unit, and estimating characteristics of an input speech indicated by the input speech signal, the characteristics including an environmental sound included in the input speech signal; reference speech output unit for causing a predetermined speech signal that becomes a reference speech, to output; and characteristic adding unit for adding the characteristics of the input speech estimated by the characteristic estimation unit, in a reference speech signal that is the speech signal caused to output by the reference speech output unit.
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Citations
10 Claims
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1. A speech signal processing system comprising:
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an input speech storage that stores an input speech signal; a characteristic estimation unit that refers to the input speech signal stored in the input speech storage, and estimates characteristics of the input speech, the characteristics including an environmental sound included in the input speech signal, and the SN estimation unit obtains powers of the non-speech portion of the speech and a speech portion of the inputted speech signal and estimates an SN ratio; a reference speech output that causes a predetermined speech signal that becomes a reference speech to be output; a volume adjustment unit that adjusts the volume of the reference speech according to the SN ratio; a characteristic adding unit that adds the estimated characteristics of the input speech, to the output reference speech signal of volume adjustment unit. - View Dependent Claims (2, 3, 4, 7, 8, 9, 10)
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5. A speech signal processing method comprising:
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storing an input speech signal; referring to the stored input speech signal; estimating characteristics of an input speech indicated by the input speech signal, the characteristics including an environmental sound included in the input speech signal; obtaining powers of the non-speech portion of the speech and a speech portion of the inputted speech signal and estimating an SN ratio; causing a predetermined speech signal that becomes a reference speech to be output; adjusting the volume of the reference speech according to the SN ratio; and adding the estimated characteristics of the input speech, to the output reference speech signal.
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6. A non-transitory computer readable storage medium storing a speech signal processing program to execute a method for causing a computer comprising an input speech storage unit to store an input speech signal that is an inputted speech signal, the method comprising:
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storing an input speech signal; referring to the stored input speech signal; estimating characteristics of an input speech indicated by the input speech signal, characteristics including an environmental sound included in the input speech signal; obtaining powers of the non-speech portion of the speech and a portion of the inputted speech signal and estimating an SN ratio; causing a predetermined speech signal that becomes a reference speech to be output adjusting the volume of the reference speech according to the SN ratio; and adding the estimated characteristics of the input speech, to the output reference speech signal of volume adjustment unit.
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Specification