Voice clarification apparatus
AssigneeYamaha Corporation
InventorsHiroomi Shidoji, Ryotaro Aoki
Life of this patent
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Abstract
The voice clarification apparatus includes a plurality of band-pass filters that respectively extract a plurality of band components, which are included in a voice band, from an input audio signal; a gain determination unit that determines a gain according to the level of a signal of a band component which is extracted by at least one band-pass filter of the plurality of band-pass filters; a level adjustment unit that adjusts the levels of signals of the plurality of band components which are extracted by the plurality of band-pass filters using the gain; and a first addition unit that adds a signal which is based on the audio signal to a signal in which the gain is adjusted by the level adjustment unit, and outputs a signal obtained through the addition.
Claims9
A voice clarification apparatus comprising:
- a microcomputer;
- a memory including a program;
- a plurality of band-pass filters that respectively extract a plurality of band components, which are included in a voice band, from an input audio signal to output a plurality of feedforward, extracted band components;
- a gain determination unit that determines a gain according to a level of a signal of a band component which is extracted by a band-pass filter;
- a level adjustment unit that adjusts levels of signals of the plurality of feedforward, extracted band components using the gain;
- and
- a first addition unit that adds a signal which is based on the input audio signal to a signal including the adjusted levels of signals of the plurality of feedforward, extracted band components and excluding any feedback components of the extracted band components, and outputs a signal obtained through the addition,
- wherein the plurality of band-pass filters, the gain determination unit, the level addition unit, and the first addition unit are implemented by the microcomputer executing the program.
A voice clarification method comprising:
- respectively extracting a plurality of band components, which are included in a voice band, from an input audio signal by a plurality of band-pass filters to output a plurality of feedforward, extracted band components;
- determining a gain according to a level of a signal of a band component which is extracted by a band-pass filter;
- adjusting levels of signals of the plurality of feedforward, extracted band components using the gain;
- and
- adding a signal which is based on the input audio signal to a signal including the adjusted levels of signals of the plurality of feedforward, extracted band components and excluding any feedback components of the extracted band components, and outputting a signal obtained through the addition.
Dependencies are inferred from the claim text.