JP3388235B2 - Sound image localization device - Google Patents
Sound image localization deviceInfo
- Publication number
- JP3388235B2 JP3388235B2 JP2001005602A JP2001005602A JP3388235B2 JP 3388235 B2 JP3388235 B2 JP 3388235B2 JP 2001005602 A JP2001005602 A JP 2001005602A JP 2001005602 A JP2001005602 A JP 2001005602A JP 3388235 B2 JP3388235 B2 JP 3388235B2
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- angle
- sound image
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、設定した任意の3
次元方向に音像を生じさせる音像定位装置に関する。TECHNICAL FIELD OF THE INVENTION The present invention relates to an arbitrary 3
The present invention relates to a sound image localization device that produces a sound image in a dimensional direction.
【０００２】[0002]
【従来の技術】従来の音像定位装置は、例えば、特許第
２７４１８１７号公報がある。2. Description of the Related Art A conventional sound image localization device is disclosed in, for example, Japanese Patent No. 2741817.
【０００３】図１４は、従来の音像定位装置の構成図を
示す。FIG. 14 shows a block diagram of a conventional sound image localization apparatus.
【０００４】図１４に示すように、この音像定位装置
は、Ａ／Ｄ変換部１１と、畳み込み演算部１２と、Ｄ／
Ａ変換部１３と、音源記憶部１４と、空間インパルスレ
スポンス記憶部１５と、ヘッドホン逆インパルスレスポ
ンス記憶部１６と、入力の切り換えスイッチ１７とを備
えている。As shown in FIG. 14, this sound image localization apparatus has an A / D converter 11, a convolution calculator 12, and a D / D converter.
The A conversion unit 13, the sound source storage unit 14, the spatial impulse response storage unit 15, the headphone reverse impulse response storage unit 16, and the input changeover switch 17 are provided.
【０００５】次に、上記従来の音像定位装置の動作につ
いて説明する。Next, the operation of the above conventional sound image localization apparatus will be described.
【０００６】Ａ／Ｄ変換部１１の入力は試験用音源に接
続されている。畳み込み演算部１２は、左耳用畳み込み
演算部（ｌ）１２Ｌと、右耳用畳み込み演算部（ｒ）１
２Ｒとを備え、各出力は２チャンネルを持つＤ／Ａ変換
部１３の各チャンネルでアナログ信号に変換されて耳栓
型やインナーイヤホン型を含む両耳ヘッドホンに出力さ
れる。The input of the A / D converter 11 is connected to the test sound source. The convolution operation unit 12 includes a left ear convolution operation unit (l) 12L and a right ear convolution operation unit (r) 1.
2R, each output is converted into an analog signal in each channel of the D / A conversion unit 13 having two channels and output to binaural headphones including earplug type and inner earphone type.
【０００７】空間インパルスレスポンス記憶部１５の畳
み込み用データとヘッドホン逆インパルスレスポンス記
憶部１６の畳み込み用データは利用者に選択されて、畳
み込み演算部１２のフィルタ係数として設定される。空
間インパルスレスポンス記憶部１５のＳｏｉｌ（ｔ）は
正中面、左耳、ｉ番目のレスポンス、Ｓｏｉｒ（ｔ）は
正中面、右耳、ｉ番目のレスポンス、Ｓｄｉｌ（ｔ）は
方向ｄ、左耳、ｉ番目のレスポンス、Ｈ-1i（ｔ）はヘ
ッドホンの逆特性のレスポンスを表している。The convolutional data in the spatial impulse response storage unit 15 and the convolutional data in the headphone inverse impulse response storage unit 16 are selected by the user and set as the filter coefficients of the convolution operation unit 12. Soil (t) of the spatial impulse response storage unit 15 is the median plane, left ear, i-th response, Soir (t) is the median plane, right ear, i-th response, Sdir (t) is direction d, left ear, The i-th response, H −1 i (t), represents the response with the inverse characteristics of the headphones.
【０００８】畳み込み演算部１２の入力は切り替えスイ
ッチ１７を介して切り替えによりＡ／Ｄ変換部１１のデ
ィジタル変換出力または音源記憶部１４の出力に接続可
能になっている。The input of the convolution operation unit 12 can be connected to the digital conversion output of the A / D conversion unit 11 or the output of the sound source storage unit 14 by switching through the changeover switch 17.
【０００９】以上のように、前記従来の音像定位装置で
も、音源信号に音像を定位させたい方向に対応する空間
インパルスレスポンスとヘッドホン逆インパルスレスポ
ンスを畳み込むことにより、音像を定位することはでき
る。As described above, even with the conventional sound image localization device, the sound image can be localized by convolving the spatial impulse response and the headphone reverse impulse response corresponding to the direction in which the sound image is desired to be localized.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、前記従
来の音像定位装置では、音像を定位させたい方向ごとに
空間インパルスレスポンス、すなわち頭部インパルス応
答を測定し、それを記憶しておかなければならず、測定
に多大な時間と労力が必要であることのみならず、大き
な記憶容量が装置に必要となるという問題があった。However, in the above-mentioned conventional sound image localization apparatus, it is necessary to measure the spatial impulse response, that is, the head impulse response for each direction in which the sound image is desired to be localized, and store it. However, there is a problem that not only a large amount of time and labor is required for measurement, but also a large storage capacity is required for the device.
【００１１】本発明は、このような従来の問題を解決す
るためになされたもので、全ての方向について頭部イン
パルス応答を測定することなく、かつ、小さな記憶容量
で実現できる音像定位装置を提供するものである。The present invention has been made to solve such a conventional problem, and provides a sound image localization apparatus which can be realized with a small storage capacity without measuring the head impulse response in all directions. To do.
【００１２】[0012]
【課題を解決するための手段】本発明の音像定位装置
は、音像を発生させる方向を設定する音像方向設定部
と、前記設定された音像方向を側方角と上昇角に変換す
る角度変換部と、側方角に対応する側方角制御情報を予
め記憶し前記角度変換部より前記側方角が入力するとき
前記側方角制御情報を出力する側方角制御情報記憶部
と、上昇角に対応する上昇角制御情報を予め記憶し前記
角度変換部より前記上昇角が入力したとき前記上昇角制
御情報を出力する上昇角制御情報記憶部と、ヘッドホン
逆特性情報の記憶部と、前記側方角制御情報と前記上昇
角制御情報と前記ヘッドホン逆特性情報とを音源信号に
畳み込み演算する畳み込み演算部とを備えるものであ
る。A sound image localization apparatus of the present invention comprises a sound image direction setting unit for setting a direction in which a sound image is generated, and an angle conversion unit for converting the set sound image direction into a side angle and a rising angle. , A lateral angle control information storage unit that pre-stores lateral angle control information corresponding to a lateral angle and outputs the lateral angle control information when the lateral angle is input from the angle conversion unit, and a rising angle control corresponding to a rising angle. A rising angle control information storage unit that stores information in advance and outputs the rising angle control information when the rising angle is input from the angle conversion unit, a headphone inverse characteristic information storage unit, the side angle control information, and the rising angle. A convolution operation unit for performing a convolution operation on the sound source signal with the angle control information and the headphone inverse characteristic information.
【００１３】従って、本発明の音像定位装置は、音像を
定位させたい方向を側方角と上昇角に変換し、側方角制
御情報と上昇角制御情報を呼び出して音源信号に畳み込
み演算を行うようにすることにより、全ての方向につい
て頭部インパルス応答を測定することなく測定が容易
で、かつ、小さな記憶容量で音像を定位することができ
る。Therefore, the sound image localization apparatus of the present invention converts the direction in which the sound image is desired to be localized into the lateral angle and the rising angle, and calls the lateral angle control information and the rising angle control information to perform the convolution operation on the sound source signal. By doing so, it is possible to easily perform measurement without measuring the head impulse response in all directions, and to localize the sound image with a small storage capacity.
【００１４】また、本発明の音像定位装置は、前記側方
角制御情報記憶部に記憶する前記側方角制御情報は両耳
間時間差とし、前記上昇角制御情報記憶部に記憶する前
記上昇角制御情報は正中面頭部インパルス応答とするも
のである。Further, in the sound image localization apparatus of the present invention, the lateral angle control information stored in the lateral angle control information storage unit is an interaural time difference, and the rising angle control information stored in the rising angle control information storage unit. Is the median plane head impulse response.
【００１５】従って、本発明の音像定位装置は、音像を
定位させたい方向を側方角と上昇角に変換し、側方角に
対応する両耳間時間差と上昇角に対応する正中面頭部イ
ンパルス応答を呼び出して音源信号に畳み込み演算を行
うようにすることにより、全ての方向について頭部イン
パルス応答を測定することなく測定が容易で、かつ、小
さな記憶容量で音像を定位することができる。Therefore, the sound image localization apparatus of the present invention converts the direction in which the sound image is desired to be localized into the lateral angle and the rising angle, and the interaural time difference corresponding to the lateral angle and the mid-face head impulse response corresponding to the rising angle. Is called to perform the convolution calculation on the sound source signal, the measurement can be easily performed without measuring the head impulse response in all directions, and the sound image can be localized with a small storage capacity.
【００１６】また、本発明の音像定位装置は、前記側方
角制御情報記憶部に記憶する前記側方角制御情報は両耳
間レベル差とし、前記上昇角制御情報記憶部に記憶する
前記上昇角制御情報は正中面頭部インパルス応答とする
ものである。Further, in the sound image localization apparatus of the present invention, the lateral angle control information stored in the lateral angle control information storage unit is an interaural level difference, and the rising angle control stored in the rising angle control information storage unit. The information is the median plane impulse response.
【００１７】従って、本発明の音像定位装置は、音像を
定位させたい方向を側方角と上昇角に変換し、側方角に
対応する両耳間レベル差と上昇角に対応する正中面頭部
インパルス応答を呼び出して音源信号に畳み込み演算を
行うようにすることにより、全ての方向について頭部イ
ンパルス応答を測定することなく測定が容易で、かつ、
小さな記憶容量で音像を定位することができる。Therefore, the sound image localization apparatus of the present invention converts the direction in which the sound image is desired to be localized into the lateral angle and the elevation angle, and the interaural level difference corresponding to the lateral angle and the median plane head impulse corresponding to the elevation angle. By calling the response and performing the convolution operation on the sound source signal, measurement is easy without measuring the head impulse response in all directions, and
The sound image can be localized with a small storage capacity.
【００１８】さらに、本発明の音像定位装置は、前記側
方角制御情報記憶部に記憶する前記側方角制御情報は両
耳間時間差および両耳間レベル差とし、前記上昇角制御
情報記憶部に記憶する前記上昇角制御情報は正中面頭部
インパルス応答とするものである。Further, in the sound image localization apparatus of the present invention, the lateral angle control information stored in the lateral angle control information storage unit is an interaural time difference and an interaural level difference, and is stored in the rising angle control information storage unit. The rising angle control information to be used is a median plane head impulse response.
【００１９】従って、発明の音像定位装置は、音像を定
位させたい方向を側方角と上昇角に変換し、側方角に対
応する両耳間時間差および両耳間レベル差と上昇角に対
応する正中面インパルス応答を呼び出して音源信号に畳
み込み演算を行うようにすることにより、全ての方向に
ついて頭部インパルス応答を測定することなく測定が容
易で、かつ、小さな記憶容量で音像を定位することがで
きる。Therefore, the sound image localization apparatus of the invention converts the direction in which the sound image is desired to be localized into the lateral angle and the rising angle, and the interaural time difference corresponding to the lateral angle and the interaural level difference and the median angle corresponding to the rising angle. By calling the surface impulse response and performing the convolution operation on the sound source signal, the measurement can be easily performed without measuring the head impulse response in all directions, and the sound image can be localized with a small storage capacity. .
【００２０】[0020]
【発明実施の形態】以下、本発明の実施の形態につい
て、図面を用いて説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００２１】図１は、本発明の実施の形態における音像
定位装置の構成図を示す。FIG. 1 shows a block diagram of a sound image localization apparatus according to an embodiment of the present invention.
【００２２】本発明の音像定位装置は、音像を定位させ
たい方向を設定する音像方向設定部１０１と、音像方向
を側方角αと上昇角βに変換する角度変換部１０２と、
音像の側方角を制御する情報を記憶する側方角制御情報
記憶部１０３と、音像の上昇角を制御する情報を記憶す
る上昇角制御情報記憶部１０４と、ヘッドホンの逆特性
情報を記憶するヘッドホン逆特性情報記憶部１０５と、
音源信号を入力信号とし、それに側方角制御情報と上昇
角制御情報とヘッドホン逆特性情報を畳み込む畳み込み
演算部１０６とで構成されている。畳み込み演算部１０
６の出力は、耳栓型やインナーイヤホン型を含むヘッド
ホンに出力される。The sound image localization apparatus of the present invention includes a sound image direction setting unit 101 for setting a direction in which a sound image is desired to be localized, an angle conversion unit 102 for converting the sound image direction into a lateral angle α and a rising angle β.
A side angle control information storage unit 103 that stores information that controls the side angle of a sound image, a rise angle control information storage unit 104 that stores information that controls the rise angle of a sound image, and a headphone reverse that stores reverse characteristic information of headphones. A characteristic information storage unit 105,
The sound source signal is used as an input signal, and the convolution operation unit 106 convolves side angle control information, elevation angle control information, and headphone inverse characteristic information. Convolution operation unit 10
The output of 6 is output to headphones including earplug type and inner earphone type.
【００２３】側方角制御情報記憶部１０３は、側方角制
御情報として、両耳間時間差又は両耳間レベル差もしく
は、両耳間時間差と両耳間レベル差の双方を記憶し、畳
み込み演算部１０６により音源信号に畳み込まれる。The lateral angle control information storage unit 103 stores, as lateral angle control information, an interaural time difference, an interaural level difference, or both an interaural time difference and an interaural level difference, and the convolution operation unit 106. Is convolved with the sound source signal.
【００２４】上昇角制御情報記憶部１０４は、上昇角制
御情報として正中面頭部インパルス応答を記憶し、畳み
込み演算部１０６により音源信号に畳み込まれる。The rising angle control information storage unit 104 stores the median plane head impulse response as the rising angle control information, and the convolution operation unit 106 convolves the sound source signal.
【００２５】図２は、側方角制御情報として両耳間時間
差を用いる例を示す。FIG. 2 shows an example in which the interaural time difference is used as the lateral angle control information.
【００２６】図２では、成人の側方角に対応した両耳間
時間差として標準的な成人の値を示しているが、受聴者
が特定される場合は、受聴者個人の両耳間時間差を測定
して、その測定値を与えるようにすることもできる。In FIG. 2, a standard adult value is shown as the interaural time difference corresponding to the lateral angle of an adult, but when the listener is specified, the interaural time difference of the listener is measured. Then, the measured value can be given.
【００２７】図３は、側方角制御情報として両耳間レベ
ル差を用いる例を示す。FIG. 3 shows an example in which the interaural level difference is used as the lateral angle control information.
【００２８】図３では、成人の側方角に対応した両耳間
レベル差として標準的な成人の値を示しているが、受聴
者が特定される場合は、受聴者個人の両耳間レベル差を
測定して、その測定値を与えるようにすることもでき
る。In FIG. 3, the standard adult value is shown as the interaural level difference corresponding to the lateral angle of the adult, but when the listener is specified, the interaural level difference of the listener is individual. Can be measured and the measured value can be given.
【００２９】図４は、側方角制御情報として両耳間時間
差と両耳間レベル差を用いる例を示す。FIG. 4 shows an example in which the interaural time difference and the interaural level difference are used as the lateral angle control information.
【００３０】図４では、成人の側方角に対応した両耳間
時間差と両耳間レベル差として標準的な成人の値を示し
ているが、受聴者が特定される場合は、受聴者個人の両
耳間時間差と両耳間レベル差を測定して、それらの測定
値を与えるようにすることもできる。In FIG. 4, standard adult values are shown as the interaural time difference and the interaural level difference corresponding to the lateral angle of the adult. However, when the listener is specified, the listener's individual It is also possible to measure the interaural time difference and the interaural level difference and to provide those measured values.
【００３１】図５は、上昇角制御情報として正中面頭部
インパルス応答を用いる例を示す。FIG. 5 shows an example in which the median plane head impulse response is used as the elevation angle control information.
【００３２】正中面頭部インパルス応答は、成人の標準
的なものを用いてもよいし、受聴者が特定される場合
は、受聴者個人の正中面頭部インパルス応答を測定し
て、その測定値を与えるようにすることもできる。As the median plane impulse response, an adult standard one may be used. When the listener is specified, the median plane impulse response of the listener is measured and the measurement is performed. It is possible to give a value.
【００３３】次に、図１乃至図６を参照して、本発明の
実施の形態における音像定位装置の動作を説明する。Next, the operation of the sound image localization apparatus according to the embodiment of the present invention will be described with reference to FIGS.
【００３４】図１において、音像方向設定部１０１は音
像を定位させたい３次元方向を設定する。３次元方向設
定の際の座標系は任意のものでよい。角度変換部１０２
で人が３次元の音像方向を知覚する側方角αと上昇角β
に変換する。In FIG. 1, a sound image direction setting unit 101 sets a three-dimensional direction in which a sound image is desired to be localized. Any coordinate system may be used when setting the three-dimensional direction. Angle converter 102
The lateral angle α and the rising angle β at which a person perceives a three-dimensional sound image direction
Convert to.
【００３５】図６は、３次元方向を表現する側方角αお
よび上昇角βと極座標（方位角ψと仰角θ）との関係を
示す図であり、図６に示すように通常３次元方向を設定
する際に用いられる極座標（方位角ψと仰角θ）で方向
を設定する場合は、式（１）を用いて側方角αと上昇角
βに変換する。
α＝arccos(sinψcosθ)
β＝arcsin(sinθ／(sin2θ＋cos2ψcos2θ)1/2) （１）
側方角αに対応した側方角制御情報、すなわち側方角α
に対応する両耳間時間差、両耳間レベル差のいずれか、
あるいは双方を側方角制御情報記憶部１０３から呼び出
し、畳み込み演算部１０６に格納する。さらに上昇角β
に対応した上昇角制御情報、すなわち上昇角βに対応し
た正中面頭部インパルス応答を上昇角制御情報記憶部１
０４から呼び出し、畳み込み演算部１０６に格納する。
さらに、受聴時に用いるヘッドホンの逆特性情報をヘッ
ドホン逆特性情報記憶部１０５から呼び出し、畳み込み
演算部１０６に格納する。畳み込み演算部１０６で、音
源信号と側方角制御情報、側方角制御情報、およびヘッ
ドホンの逆特性情報との畳み込み演算を行うことにより
右耳信号および左耳信号を作成し、ヘッドホンへ出力す
る。FIG. 6 is a diagram showing the relationship between the lateral angle α and the ascending angle β representing the three-dimensional direction and the polar coordinates (azimuth angle ψ and elevation angle θ). As shown in FIG. When the direction is set by the polar coordinates (azimuth angle ψ and elevation angle θ) used when setting, the lateral angle α and the ascending angle β are converted using the equation (1). α = arccos (sinψcosθ) β = arcsin (sinθ / (sin 2 θ + cos 2 ψcos 2 θ) 1/2) (1) side direction side angle control information corresponding to the alpha, i.e. side angle alpha
Either the interaural time difference or the interaural level difference corresponding to
Alternatively, both are called from the lateral direction control information storage unit 103 and stored in the convolution operation unit 106. Further rise angle β
Of the elevation angle control information corresponding to the elevation angle β, that is, the impulse response of the median plane head corresponding to the elevation angle β.
It is called from 04 and stored in the convolution operation unit 106.
Further, the inverse characteristic information of the headphones used at the time of listening is called from the headphone inverse characteristic information storage unit 105 and stored in the convolution operation unit 106. The convolution calculation unit 106 performs a convolution calculation of the sound source signal, the lateral angle control information, the lateral angle control information, and the inverse characteristic information of the headphones to generate a right ear signal and a left ear signal, and outputs the signals to the headphones.
【００３６】次に、側方角制御情報と上昇角制御情報に
より３次元方向の音像定位を行う例に付き説明する。Next, an example of performing sound image localization in a three-dimensional direction by using the lateral angle control information and the rising angle control information will be described.
【００３７】図７乃至図１３は、側方角制御情報として
受聴者本人の両耳間時間差を用い、上昇角制御情報とし
て受聴者本人の正中面頭部インパルス応答を用いて３次
元方向の音像定位を行った結果を示す。FIGS. 7 to 13 show the sound image localization in the three-dimensional direction using the interaural time difference of the listener as the lateral angle control information and the median plane head impulse response of the listener as the elevation angle control information. The result is shown.
【００３８】図７乃至図１３は、音像を定位させたい上
昇角毎に定位結果を示しており、横軸は定位させようと
した提示側方角、縦軸は受聴者が音像を知覚して回答し
た回答側方角である。7 to 13 show the localization results for each rising angle at which the sound image is desired to be localized. The horizontal axis represents the presented lateral direction for localization, and the vertical axis represents the sound image perceived by the listener. The answer is from the side.
【００３９】図７は、上昇角が０度の場合を示し、図８
は、上昇角が３０度の場合を示し、図９は、上昇角が６
０度の場合を示し、図１０は、上昇角が９０度の場合を
示し、図１１は、上昇角が１２０度の場合を示し、図１
２は、上昇角が１５０度の場合を示し、図１３は、上昇
角が１８０度の場合を示す。FIG. 7 shows the case where the ascending angle is 0 degree, and FIG.
Shows the case where the rising angle is 30 degrees, and in FIG. 9, the rising angle is 6 degrees.
1 shows the case where the elevation angle is 90 degrees, FIG. 10 shows the case where the elevation angle is 90 degrees, and FIG.
2 shows the case where the rising angle is 150 degrees, and FIG. 13 shows the case where the rising angle is 180 degrees.
【００４０】いずれの上昇角の図においても回答が対角
線付近に分布しており、提示側方角と回答側方角がよく
一致している。なお、側方角制御情報としては、両耳間
時間差だけではなく、両耳間レベル差を用いた場合も、
あるいは両耳間時間差と両耳間レベル差の双方を用いた
場合も、３次元音像定位が実現できる。In each of the figures of the rising angles, the responses are distributed in the vicinity of the diagonal line, and the presentation side direction and the response side direction are in good agreement. As the lateral angle control information, not only the interaural time difference but also the interaural level difference is used.
Alternatively, when both the interaural time difference and the interaural level difference are used, three-dimensional sound image localization can be realized.
【００４１】また、３次元空間を水平方向にｍ方向、鉛
直方向にｎ方向に分割して、ｍ×ｎの組み合わせのいず
れかの方向に音像を定位させるとすると、従来の音像定
位装置では、ｍ×ｎの組み合わせの全ての方向に頭部イ
ンパルス応答が必要であるが、本発明の音像定位装置で
はｍ個の側方角制御情報、すなわち両耳間時間差情報と
両耳間レベル差情報のいずれか、または双方と、正中面
内のｎ方向の頭部インパルス応答だけで十分であり、全
ての方向について頭部インパルス応答を測定することな
く、かつ小さな記憶容量で音像を定位することができ
る。If a three-dimensional space is divided horizontally into m directions and vertically into n directions and sound images are localized in either direction of m × n combinations, the conventional sound image localization apparatus A head impulse response is required in all directions of m × n combinations, but the sound image localization apparatus of the present invention uses m pieces of lateral angle control information, that is, interaural time difference information and interaural level difference information. Either or both, the head impulse response in the n direction in the median plane is sufficient, and the sound image can be localized with a small storage capacity without measuring the head impulse response in all directions.
【００４２】[0042]
【発明の効果】本発明の音像定位装置は、音像を発生さ
せる方向を設定する音像方向設定部と、前記設定された
音像方向を側方角と上昇角に変換する角度変換部と、側
方角に対応する側方角制御情報を予め記憶し前記角度変
換部より前記側方角が入力するとき前記側方角制御情報
を出力する側方角制御情報記憶部と、上昇角に対応する
上昇角制御情報を予め記憶し前記角度変換部より前記上
昇角が入力するとき前記上昇角制御情報を出力する上昇
角制御情報記憶部と、ヘッドホン逆特性情報の記憶部
と、前記側方角制御情報と前記上昇角制御情報と前記ヘ
ッドホン逆特性情報とを音源信号に畳み込み演算する畳
み込み演算部とを備えるものである。According to the sound image localization apparatus of the present invention, a sound image direction setting unit for setting a direction in which a sound image is generated, an angle conversion unit for converting the set sound image direction into a lateral angle and a rising angle, and a lateral angle. A side angle control information storage unit that stores corresponding side angle control information in advance and outputs the side angle control information when the side angle is input from the angle conversion unit, and a rise angle control information corresponding to a rise angle are stored in advance. The elevation angle control information storage unit that outputs the elevation angle control information when the elevation angle is input from the angle conversion unit, the headphone inverse characteristic information storage unit, the side angle control information, and the elevation angle control information. The headphone inverse characteristic information and a convolution calculation unit that performs a convolution calculation on a sound source signal.
【００４３】従って、本発明の音像定位装置は、音像を
定位させたい方向を側方角と上昇角に変換し、側方角制
御情報と上昇角制御情報を呼び出して音源信号に畳み込
み演算を行うようにすることにより、全ての方向につい
て頭部インパルス応答を測定することなく測定が容易
で、かつ、小さな記憶容量で音像を定位することができ
る。Therefore, the sound image localization apparatus of the present invention converts the direction in which the sound image is desired to be localized into the lateral angle and the rising angle, calls the lateral angle control information and the rising angle control information, and performs the convolution operation on the sound source signal. By doing so, it is possible to easily perform measurement without measuring the head impulse response in all directions, and to localize the sound image with a small storage capacity.
【図１】本発明の実施の形態における音像定位装置の構
成図FIG. 1 is a configuration diagram of a sound image localization device according to an embodiment of the present invention.
【図２】側方角制御情報として両耳間時間差を用いる例
を示す図FIG. 2 is a diagram showing an example in which an interaural time difference is used as lateral angle control information.
【図３】側方角制御情報として両耳間レベル差を用いる
例を示す図FIG. 3 is a diagram showing an example of using an interaural level difference as lateral angle control information.
【図４】側方角制御情報として両耳間時間差と両耳間レ
ベル差を用いる例を示す図FIG. 4 is a diagram showing an example in which an interaural time difference and an interaural level difference are used as lateral angle control information.
【図５】上昇角制御情報として正中面頭部インパルス応
答を用いる例を示す図FIG. 5 is a diagram showing an example in which a median plane head impulse response is used as rising angle control information.
【図６】３次元方向を表現する側方角αおよび上昇角β
と極座標（方位角ψと仰角θ）との関係を示す図FIG. 6 is a lateral angle α and a rising angle β representing a three-dimensional direction.
Diagram showing the relationship between and the polar coordinates (azimuth angle ψ and elevation angle θ)
【図７】上昇角を０度とし３次元方向の音像定位を行っ
た結果を示す図FIG. 7 is a diagram showing a result of performing sound image localization in a three-dimensional direction with a rising angle of 0 degree.
【図８】上昇角を３０度とし３次元方向の音像定位を行
った結果を示す図FIG. 8 is a diagram showing a result of performing sound image localization in a three-dimensional direction with a rising angle of 30 degrees.
【図９】上昇角を６０度とし３次元方向の音像定位を行
った結果を示す図FIG. 9 is a diagram showing a result of performing sound image localization in a three-dimensional direction with a rise angle of 60 degrees.
【図１０】上昇角を９０度とし３次元方向の音像定位を
行った結果を示す図FIG. 10 is a diagram showing a result of performing sound image localization in a three-dimensional direction with a rising angle of 90 degrees.
【図１１】上昇角を１２０度とし３次元方向の音像定位
を行った結果を示す図FIG. 11 is a diagram showing a result of performing sound image localization in a three-dimensional direction with a rise angle of 120 degrees.
【図１２】上昇角を１５０度とし３次元方向の音像定位
を行った結果を示す図FIG. 12 is a diagram showing a result of performing sound image localization in a three-dimensional direction with a rising angle of 150 degrees.
【図１３】上昇角を１８０度とし３次元方向の音像定位
を行った結果を示す図FIG. 13 is a diagram showing a result of performing sound image localization in a three-dimensional direction with an elevation angle of 180 degrees.
【図１４】従来の音像定位装置の構成図FIG. 14 is a configuration diagram of a conventional sound image localization device.
１１ Ａ／Ｄ変換部 １２ 畳み込み演算部 １３ Ｄ／Ａ変換部 １４ 音源記憶部 １５ 空間インパルスレスポンス記憶部 １６ ヘッドホン逆インパルスレスポンス記憶部 １０１ 音像方向設定部 １０２ 角度変換部 １０３ 側方角制御情報記憶部 １０４ 上昇角制御情報記憶部 １０５ ヘッドホン逆特性記憶部 １０６ 畳み込み演算部 11 A / D converter 12 Convolution operation unit 13 D / A converter 14 Sound source storage 15 Spatial impulse response storage unit 16 Headphone reverse impulse response memory 101 sound image direction setting unit 102 Angle converter 103 Lateral direction control information storage unit 104 Lift angle control information storage unit 105 Headphone inverse characteristic storage unit 106 Convolution operation unit
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H04S 1/00 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) H04S 1/00
Claims (4)
向設定部と、前記設定された音像方向を側方角と上昇角
に変換する角度変換部と、側方角に対応する側方角制御
情報を予め記憶し前記角度変換部より前記側方角が入力
するとき前記側方角制御情報を出力する側方角制御情報
記憶部と、上昇角に対応する上昇角制御情報を予め記憶
し前記角度変換部より前記上昇角が入力したとき前記上
昇角制御情報を出力する上昇角制御情報記憶部と、ヘッ
ドホン逆特性情報の記憶部と、前記側方角制御情報と前
記上昇角制御情報と前記ヘッドホン逆特性情報とを音源
信号に畳み込み演算する畳み込み演算部とを備えること
を特徴とする音像定位装置。1. A sound image direction setting unit that sets a direction in which a sound image is generated, an angle conversion unit that converts the set sound image direction into a lateral angle and a rising angle, and lateral angle control information corresponding to the lateral angle in advance. The side angle control information storage unit that stores and outputs the side angle control information when the side angle is input from the angle conversion unit, and the elevation angle control information corresponding to the elevation angle is stored in advance and the elevation angle is increased by the angle conversion unit. A sound source including a rising angle control information storage unit that outputs the rising angle control information when an angle is input, a headphone inverse characteristic information storage unit, the side angle control information, the rising angle control information, and the headphone inverse characteristic information. A sound image localization apparatus comprising: a convolution operation unit that performs a convolution operation on a signal.
記側方角制御情報は両耳間時間差とし、前記上昇角制御
情報記憶部に記憶する前記上昇角制御情報は正中面頭部
インパルス応答とすることを特徴とする請求項１に記載
の音像定位装置。2. The lateral angle control information stored in the lateral angle control information storage unit is a binaural time difference, and the rising angle control information stored in the rising angle control information storage unit is a median head impulse response. The sound image localization device according to claim 1.
記側方角制御情報は両耳間レベル差とし、前記上昇角制
御情報記憶部に記憶する前記上昇角制御情報は正中面頭
部インパルス応答とすることを特徴とする請求項１に記
載の音像定位装置。3. The lateral angle control information stored in the lateral angle control information storage unit is a binaural level difference, and the rising angle control information stored in the rising angle control information storage unit is a median plane head impulse response. The sound image localization apparatus according to claim 1, wherein
記側方角制御情報は両耳間時間差および両耳間レベル差
とし、前記上昇角制御情報記憶部に記憶する前記上昇角
制御情報は正中面頭部インパルス応答とすることを特徴
とする請求項１に記載の音像定位装置。4. The lateral angle control information stored in the lateral angle control information storage unit is an interaural time difference and an interaural level difference, and the elevation angle control information stored in the elevation angle control information storage unit is a median. The sound image localization apparatus according to claim 1, wherein the face-to-head impulse response is used.
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|---|---|---|---|
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|---|---|---|---|
| JP2001005602A JP3388235B2 (en) | 2001-01-12 | 2001-01-12 | Sound image localization device |
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