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1. WO2011004744 - ACOUSTIC SIGNAL PROCESSING DEVICE, PROCESSING METHOD THEREOF, AND PROGRAM

Publication Number WO/2011/004744
Publication Date 13.01.2011
International Application No. PCT/JP2010/061108
International Filing Date 30.06.2010
IPC
H04S 1/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS
1Two-channel systems
G10K 15/04 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
15Acoustics not otherwise provided for
04Sound-producing devices
G10L 21/02 2006.01
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
CPC
G01V 3/12
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
3Electric or magnetic prospecting or detecting
12operating with electromagnetic waves
G10H 1/361
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
HELECTROPHONIC MUSICAL INSTRUMENTS
1Details of electrophonic musical instruments
36Accompaniment arrangements
361Recording/reproducing of accompaniment for use with an external source, e.g. karaoke systems
G10L 19/008
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
008Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
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
H04R 2430/03
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
2430Signal processing covered by H04R, not provided for in its groups
03Synergistic effects of band splitting and sub-band processing
H04R 5/04
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
5Stereophonic arrangements
04Circuit arrangements, ; e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
Applicants
  • ソニー株式会社 SONY CORPORATION [JP]/[JP] (AllExceptUS)
  • 錦織 修一郎 NISHIGORI Shuichiro [JP]/[JP] (UsOnly)
  • 鈴木 志朗 SUZUKI Shiro [JP]/[JP] (UsOnly)
  • 井上 晃 INOUE Akira [JP]/[JP] (UsOnly)
Inventors
  • 錦織 修一郎 NISHIGORI Shuichiro
  • 鈴木 志朗 SUZUKI Shiro
  • 井上 晃 INOUE Akira
Agents
  • 稲本 義雄 INAMOTO Yoshio
Priority Data
2009-16056107.07.2009JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) ACOUSTIC SIGNAL PROCESSING DEVICE, PROCESSING METHOD THEREOF, AND PROGRAM
(FR) DISPOSITIF DE TRAITEMENT D'UN SIGNAL ACOUSTIQUE, PROCÉDÉ DE TRAITEMENT ASSOCIÉ ET PROGRAMME
(JA) 音響信号処理装置、その処理方法およびプログラム
Abstract
(EN)
Provided is an acoustic signal processing device, a processing method thereof, and a program, by which auditory noises which occur in differential signals generated by acoustic signals of a plurality of channels can be suppressed. A differential spectrum calculation unit (320) calculates a differential absolute value of frequency spectra of left and right channels from the frequency spectrum generation units (311 and 312) as a differential spectrum. A low level band determination unit (330) determines a differential spectrum corresponding to a low level band from among differential spectra of all frequency bands. A substitution spectrum generation unit (350) generates a substitution spectrum for substituting the differential spectrum on the basis of the frequency spectrum of the left channel. A spectrum substitution unit (360) substitutes the differential spectrum corresponding to the low level band to the substitution spectrum corresponding to the differential spectrum. An accompaniment signal generation unit (370) generates an accompaniment signal by converting the frequency spectrum from the spectrum substitution unit (360) to a time domain signal.
(FR)
Cette invention se rapporte à un dispositif de traitement d'un signal acoustique, à un procédé de traitement associé et à un programme, grâce auxquels il est possible de supprimer des bruits auditifs qui se produisent dans des signaux différentiels générés par des signaux acoustiques d'une pluralité de canaux. Une unité de calcul de spectre différentiel (320) calcule une valeur absolue différentielle des spectres de fréquence des canaux gauche et droit en provenance des unités de génération de spectre de fréquence (311 et 312) en tant que spectre différentiel. Une unité de détermination de bande à faible niveau (330) détermine un spectre différentiel qui correspond à une bande à faible niveau à partir des spectres différentiels de toutes les bandes de fréquence. Une unité de génération de spectre de substitution (350) génère un spectre de substitution de façon à substituer le spectre différentiel sur la base du spectre de fréquence du canal gauche. Une unité de substitution de spectre (360) substitue le spectre différentiel qui correspond à la bande à faible niveau au spectre de substitution qui correspond au spectre différentiel. Une unité de génération de signal d'accompagnement (370) génère un signal d'accompagnement en convertissant le spectre de fréquence en provenance de l'unité de substitution de spectre (360) en un signal dans le domaine temporel.
(JA)
 本発明は、複数チャンネルの音響信号により生成される差分信号に生じる聴覚ノイズを抑制する音響信号処理装置、その処理方法およびプログラムに関する。 差分スペクトル算出部320は、周波数スペクトル生成部311および312からの左及び右チャンネルの周波数スペクトルの差分絶対値を差分スペクトルとして算出する。低レベル帯域判定部330は、全周波数帯域の差分スペクトルのうち、低レベル帯域に対応する差分スペクトルを判定する。置換スペクトル生成部350は、差分スペクトルを置き換えるための置換スペクトルを左チャンネルの周波数スペクトルに基づいて生成する。スペクトル置換部360は、低レベル帯域に対応する差分スペクトルを、その差分スペクトルに対応する置換スペクトルに置き換える。伴奏信号生成部370は、スペクトル置換部360からの周波数スペクトルを時間領域の信号に変換することで伴奏信号を生成する。
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