Masker sound generation apparatus and program
AssigneeYamaha Corporation
InventorsMai Koike, Yasushi Shimizu, Masato Hata, Takashi Yamakawa
Life of this patent
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Abstract
In a masker sound generation apparatus, an acquisition part acquires a sound signal, and a generation part generates a masker sound signal based on the acquired sound signal. Specifically, the generation part divides the sound signal acquired by the acquisition part into a plurality of sections each having a predetermined time length, then repeats a sorting process of sorting the divided sections as a process of changing the sequence of arrangement of the sound signal, and alters a manner of sorting the sections each time the sorting process is repeated.
Claims18
A masker sound generation apparatus comprising:
- an acquisition part that acquires a sound signal having a first predetermined time length;
- and
- a generation part that repeats, for a second predetermined time length longer than the first predetermined time length, a process of outputting a masker sound signal obtained by changing a sequence of arrangement of the sound signal of the first predetermined time length according to a random number sequence, and that repeats a process of altering the random number sequence each time the second predetermined time length passes.
A non-transitory computer readable storage medium containing a program executable by a computer to perform:
- acquiring a sound signal having a first predetermined time length;
- repeating, for a second predetermined time length longer than the first predetermined time length, a process of outputting a masker sound signal obtained by changing a sequence of arrangement in the acquired sound signal of the first predetermined time length according to a random number sequence;
- and
- repeating a process of altering the random number sequence each time the second predetermined time length passes.
A masker sound generation apparatus comprising:
- an acquisition part that acquires a sound signal having a first predetermined time length;
- and
- a generation part that divides the sound signal acquired by the acquisition part into a plurality of sections each containing sound signal fractions, then repeats, each time a second predetermined time length passes, the second predetermined time length longer than the first predetermined time length, generating sound signal fractions obtained by selecting some of the divided sections according to a random number sequence and by reversing each of the sound signal fractions of the selected sections, and repeating, for the second predetermined time length, sequentially outputting the generated sound signal fractions to form a masker sound signal.
A non-transitory computer readable storage medium containing program executable by a computer to perform:
- acquiring a sound signal having a first predetermined time length;
- dividing the acquired sound signal into a plurality of sections each containing sound signal fractions;
- repeating, each time a second predetermined time length passes, the second predetermined time length longer than the first predetermined time length, a process of generating sound signal fractions obtained by selectively reversing the sound signal fractions in some of the divided sections according to a random number sequence;
- and
- repeating, for the second predetermined time length, sequentially outputting the generated sound signal fractions to form a masker sound signal.
A masker sound generation apparatus comprising:
- an acquisition part that acquires a sound signal having a first predetermined time length;
- and
- a generation part that repeats, each time a second predetermined time length passes, altering a random number sequence and generating a masker sound signal obtained by changing a sequence of arrangement of the sound signal of the first predetermined time length according to the random number sequence, wherein the generation part performs a normalization process of limiting fluctuation in time domain of a sound volume of the masker sound signal within a predetermined range during the course of generating the masker sound signal, wherein the second predetermined time length is longer than the first predetermined time length.
A non-transitory computer readable storage medium containing program executable by a computer to perform:
- acquiring a sound signal having a first predetermined time length;
- generating a masker sound signal obtained by repeating, each time a second predetermined time length passes, altering a random number sequence and changing a sequence of arrangement in the acquired sound signal of the first predetermined time length according to the random number sequence;
- and
- carrying out a normalization process of limiting fluctuation in time domain of a sound volume of the masker sound signal within a predetermined range during the course of generating the masker sound signal, wherein the second predetermined time length is longer than the first predetermined time length.
Dependencies are inferred from the claim text.