METHOD, APPARATUS AND STORAGE MEDIUM FOR SOUND MASKING

摘要

A first calculating portion calculates a model sound index value which is an index value of the maximum value of power for each frequency band of the model sound which is a model of a target sound. A second calculating portion calculates a source sound index value which is an index value of power for each frequency band with respect to each of frames extracted by a predetermined time length from a source sound signal. A third calculating portion calculates a performance index value indicating performance of masking the model sound by a sound represented by a block formed of a predetermined number of consecutive frames extracted from the source sound signal, by using the model sound index value and the source sound index value. A frame selecting portion determines a block to be used for generating the masker sound based on the performance index value.

主权项

1. An apparatus for generating a masker sound signal, comprising:
a model sound signal obtaining portion configured to obtain a model sound signal corresponding to a sound to be masked; a model sound index value calculating portion configured to calculate an index value of magnitude of the model sound signal; a source sound signal obtaining portion configured to obtain a source sound signal for generating a masker sound signal representing a sound which masks; a source sound index value calculating portion configured to divide the source sound signal into plural frames having a predetermined time length and calculate an index value of magnitude of a sound signal in each of the plural frames; a masking performance calculating portion configured to calculate, by using the index value calculated by the model sound index value calculating portion and the index value calculated by the source sound index value calculating portion, an index value of performance of masking by a sound represented by one or more frames of the source sound signal; a frame selecting portion configured to select plural frames from among the plural frames of the source sound signal based on the index value calculated by the masking performance calculating portion; and a frame coupling portion configured to couple the plural frames selected by the frame selecting portion on a time axis, to thereby generate the masker sound signal.