IMPULSE RESPONSE GENERATION DEVICE AND IMPULSE RESPONSE GENERATION PROGRAM

Japanese Patent JP2023047198

A

To automatically discriminate boundary between initial reflection and rear reverberation of an impulse response, and to generate from a single impulse response a number of impulse responses that have similar timbre and low correlation with each other.SOLUTION: An impulse response generation device includes: a signal separation section that separates an impulse response into an initial reflection sound and a rear reverberation sound; a time window multiplication section that multiplies the initial reflection sound and the rear reverberation sound by a window function obtained by shifting a time window of a predetermined time length several times; a random number generation section that generates a time shift amount by a random number; a time-shifting section that time-shifts the initial reflection sound and the rear reverberation sound, for each time window based on the time shift amount; and a signal adding section that adds the time-shifted initial reflection sound and the rear reverberation sound. The signal separation section separates the impulse response into the initial reflection sound and the rear reverberation sound, based on an evaluation function obtained by applying an ε filter to the impulse response.SELECTED DRAWING: Figure 1

NISHIGUCHI TOSHIYUKI
OKUBO HIROYUKI
SASAKI AKIRA

JP2021156154A

April 05, 2023

September 24, 2021

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JAPAN BROADCASTING CORP

G10K15/12; G10K15/00

Kenji Sugimura
Mitsutsugu Sugimura
Makoto Fukuo
Kyoichi Saito

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