Reverberation suppressing apparatus and reverberation suppressing method
AssigneeHonda Motor Co., Ltd.
InventorsKazuhiro Nakadai, Ryu Takeda, Hiroshi Okuno
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Abstract
A reverberation suppressing apparatus, includes: a sound acquiring unit which acquires a sound signal; a reverberation data computing unit which computes reverberation data from the acquired sound signal; a reverberation characteristics estimating unit which estimates reverberation characteristics based on the computed reverberation data; a filter length estimating unit which estimates a filter length of a filter which is used to suppress a reverberation based on the estimated reverberation characteristics; and a reverberation suppressing unit which suppresses the reverberation based on the estimated filter length.
Claims9
A reverberation suppressing apparatus, comprising:
- a sound acquiring unit which acquires a sound signal;
- a reverberation data computing unit which computes reverberation data from the acquired sound signal;
- a reverberation characteristics estimating unit which estimates reverberation characteristics based on the computed reverberation data;
- a filter length estimating unit which estimates an amount of filtering time based on the estimated reverberation characteristics;
- wherein the filter length estimating unit estimates the filter length by calculating reverberation intensities for a plurality of sound levels, and performing a regression analysis with respect to the calculated reverberation intensities;
- and
- a reverberation suppressing unit which applies a filter having a filter length of the estimated amount of filtering time to suppress a reverberation of a received sound signal.
A reverberation suppressing method, comprising the following steps of:
- acquiring a sound signal;
- computing reverberation data from the acquired sound signal;
- estimating reverberation characteristics based on the computed reverberation data;
- estimating an amount of filtering time based on the estimated reverberation characteristics;
- and
- applying a filter having a filter length of the estimated amount of filtering time to suppress a reverberation of the received sound signal;
- wherein the filter length estimating unit estimates the filter length by calculating reverberation intensities for a plurality of sound levels, and performing a regression analysis with respect to the calculated reverberation intensities.
A reverberation suppressing apparatus, comprising:
- a sound acquiring unit which acquires a sound signal;
- a reverberation data computing unit which computes reverberation data from the acquired sound signal;
- a reverberation characteristics estimating unit which estimates reverberation characteristics based on the computed reverberation data;
- a filter length estimating unit which estimates an amount of filtering time based on the estimated reverberation characteristics, wherein the amount of filtering time is estimated to be shorter as the acquired sound signal decays more quickly;
- wherein the filter length estimating unit estimates the filter length by calculating reverberation intensities for a plurality of sound levels, and performing a regression analysis with respect to the calculated reverberation intensities;
- and
- a reverberation suppressing unit which applies a filter having a filter length of the estimated amount of filtering time to suppress a reverberation of a received sound signal.
Dependencies are inferred from the claim text.