STEREO ACOUSTIC SIGNAL REPRODUCTION DEVICE, STEREO ACOUSTIC SIGNAL REPRODUCTION METHOD AND STEREO ACOUSTIC SIGNAL REPRODUCTION PROGRAM

• Main Authors: JORGE TREVINO, SALVADOR CASTANEDA CESAR DANIEL, SUZUKI YOICHI, KUDO TAKUMA, SAKAMOTO SHUICHI
• Format: Patent
• Language: English; Japanese
• Published: 19.04.2018
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; PUBLIC ADDRESS SYSTEMS; STEREOPHONIC SYSTEMS

PROBLEM TO BE SOLVED: To obtain a stereo acoustic signal reproduction device which allows for high quality stereo acoustic reproduction, even when synthesizing head transfer functions of arbitrary distance on a horizontal plane.SOLUTION: A stereo acoustic signal reproduction device 1 includes a head transfer function synthesis processing section 16a performing Fourier transformation for head transfer function data 14 measured with distance ralong the azimuth angle, and then performing transform processing from the distance rto distance r by using Hankel function, while furthermore performing inverse Fourier transformation using the degree μ of the Hankel function as a variable thus generating a head transfer function at the distance r, and binaural signal synthesis processing section 16b for generating a stereo acoustic signal by applying the head transfer function at the distance r to the input acoustic signal 10 as a filter.SELECTED DRAWING: Figure 1 【課題】水平面上の任意の距離の頭部伝達関数を合成する場合であっても、高品質な立体音響の再生を可能とする立体音響信号再生装置を得ること。【解決手段】立体音響信号再生装置１は、距離ｒ０で測定された頭部伝達関数データ１４に対して方位角に沿ったフーリエ変換を行った後に、ハンケル関数を用いて距離ｒ０から距離ｒへの変換処理を行い、さらにハンケル関数の次数μを変数とする逆フーリエ変換を行って距離ｒにおける頭部伝達関数を生成する頭部伝達関数合成処理部１６ａと、入力された音響信号１０に対して距離ｒにおける頭部伝達関数をフィルタとして適用して立体音響信号を生成するバイノーラル信号合成処理部１６ｂとを備える。【選択図】図１