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1. WO2020110228 - INFORMATION PROCESSING DEVICE, PROGRAM AND INFORMATION PROCESSING METHOD

Publication Number WO/2020/110228
Publication Date 04.06.2020
International Application No. PCT/JP2018/043747
International Filing Date 28.11.2018
IPC
H04R 3/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3Circuits for transducers
G10K 11/34 2006.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
18Methods or devices for transmitting, conducting or directing sound
26Sound-focusing or directing, e.g. scanning
34using electrical steering of transducer arrays, e.g. beam steering
G10L 21/0208 2013.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
21Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
02Speech enhancement, e.g. noise reduction or echo cancellation
0208Noise filtering
G10L 21/0272 2013.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
21Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
02Speech enhancement, e.g. noise reduction or echo cancellation
0272Voice signal separating
H04R 1/40 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
1Details of transducers
20Arrangements for obtaining desired frequency or directional characteristics
32for obtaining desired directional characteristic only
40by combining a number of identical transducers
CPC
G10K 11/34
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES
11Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
18Methods or devices for transmitting, conducting, or directing sound
26Sound-focusing or directing, e.g. scanning
34using electrical steering of transducer arrays, e.g. beam steering
G10L 21/0208
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
21Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
02Speech enhancement, e.g. noise reduction or echo cancellation
0208Noise filtering
G10L 21/0272
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
21Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
02Speech enhancement, e.g. noise reduction or echo cancellation
0272Voice signal separating
H04R 1/40
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
1Details of transducers, ; loudspeakers or microphones
20Arrangements for obtaining desired frequency or directional characteristics
32for obtaining desired directional characteristic only
40by combining a number of identical transducers
H04R 3/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3Circuits for transducers ; , loudspeakers or microphones
Applicants
  • 三菱電機株式会社 MITSUBISHI ELECTRIC CORPORATION [JP]/[JP]
Inventors
  • 古田 訓 FURUTA Satoru
  • 松岡 文啓 MATSUOKA Bunkei
Agents
  • 山形 洋一 YAMAGATA Yoichi
  • 佐藤 賢改 SATO Yoshinori
  • 篠原 昌彦 SHINOHARA Masahiko
  • 前田 実 MAEDA Minoru
Priority Data
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) INFORMATION PROCESSING DEVICE, PROGRAM AND INFORMATION PROCESSING METHOD
(FR) DISPOSITIF DE TRAITEMENT D'INFORMATIONS, PROGRAMME ET PROCÉDÉ DE TRAITEMENT D'INFORMATIONS
(JA) 情報処理装置、プログラム及び情報処理方法
Abstract
(EN)
The present invention is provided with: a time/frequency conversion unit (104) which generates a first spectrum component and a second spectrum component by converting each of a first observation digital signal and a second observation digital signal, generated from observed sound, into a frequency domain signal; a mask generation unit (105) which, using a cross-correlation function of the first spectrum component and the second spectrum component and on the basis of a time difference between the time of arrival of the observed sound at a first microphone and the time of arrival of the observed sound at a second microphone, calculates a filtering coefficient for masking a spectrum component of sound arriving from a direction different from a first direction from which target sound arrives; and a masking filter unit (110) which separates the spectrum component by performing masking with respect to the first spectrum component using the filtering coefficient.
(FR)
La présente invention comprend : une unité de conversion temps/fréquence (104) qui génère une première composante spectrale et une seconde composante spectrale par conversion de chacun d'un premier signal numérique d'observation et d'un second signal numérique d'observation, généré à partir d'un son observé, en un signal du domaine fréquentiel; une unité de génération de masque (105) qui, à l'aide d'une fonction de corrélation croisée de la première composante spectrale et de la seconde composante spectrale et sur la base d'une différence de temps entre le temps d'arrivée du son observé au niveau d'un premier microphone et le temps d'arrivée du son observé au niveau d'un second microphone, calcule un coefficient de filtrage pour masquer une composante spectrale d'un son arrivant d'une direction différente d'une première direction à partir de laquelle le son cible arrive; et une unité de filtre de masquage (110) qui sépare la composante spectrale en effectuant un masquage par rapport à la première composante spectrale à l'aide du coefficient de filtrage.
(JA)
観測音から生成された第1の観測デジタル信号及び第2の観測デジタル信号の各々を、周波数領域の信号に変換することで、第1のスペクトル成分及び第2のスペクトル成分を生成する時間/周波数変換部(104)と、第1のスペクトル成分及び第2のスペクトル成分の相互相関関数を用いて、観測音が、第1のマイクロホンに到来する時間と、第2のマイクロホンに到来する時間との時間差により、目的とする音が到来する第1の方向とは異なる方向から到来する音のスペクトル成分をマスキングするためのフィルタリング係数を算出するマスク生成部(105)と、第1のスペクトル成分に対して、フィルタリング係数を用いてマスキングを行うことで、スペクトル成分を分離するマスキングフィルタ部(110)とを備える。
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