JPH11219193A - On-vehicle voice recognizing device - Google Patents
On-vehicle voice recognizing deviceInfo
- Publication number
- JPH11219193A JPH11219193A JP10021975A JP2197598A JPH11219193A JP H11219193 A JPH11219193 A JP H11219193A JP 10021975 A JP10021975 A JP 10021975A JP 2197598 A JP2197598 A JP 2197598A JP H11219193 A JPH11219193 A JP H11219193A
- Authority
- JP
- Japan
- Prior art keywords
- voice
- speaker
- detecting means
- microphones
- detected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Circuit For Audible Band Transducer (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、発話者の音声以外
のノイズを低減して認識率を向上した車載用音声認識装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle speech recognition apparatus which reduces noise other than the speech of a speaker to improve the recognition rate.
【０００２】[0002]
【従来の技術】図６は従来の車載用音声認識装置のシス
テム構成を示すブロック図である。以下、図に従って説
明する。車両等の運転中にナビゲーション機器やオーデ
ィオ機器等を操作するに際してスイッチ操作による運転
者の負担を軽減するために、運転者（発話者）の発声し
た音声を認識して接続された機器に入力指示する音声認
識装置がある。2. Description of the Related Art FIG. 6 is a block diagram showing a system configuration of a conventional on-vehicle speech recognition apparatus. Hereinafter, description will be made with reference to the drawings. In order to reduce the driver's burden due to switch operation when operating navigation equipment and audio equipment while driving a vehicle, etc., it recognizes the voice uttered by the driver (speaker) and inputs instructions to the connected equipment. There is a speech recognition device that performs
【０００３】１１は話者（発話者）の発声した音声を電
気信号に変換する無指向性のマイクロフォンである。３
１はマイクロフォン１１で検出された信号レベルを調整
して音声認識部８に適切なレベルの音声信号を出力する
ためのゲイン（利得）調整部である。８はナビゲーショ
ン機器やオーディオ機器等の入力部に接続された音声認
識部である。２はマイクロフォン１１の検出結果に基い
てゲイン調整部３１を制御する制御部である。[0003] Reference numeral 11 denotes an omnidirectional microphone for converting a voice uttered by a speaker (speaker) into an electric signal. 3
Reference numeral 1 denotes a gain adjustment unit for adjusting the signal level detected by the microphone 11 and outputting an audio signal of an appropriate level to the audio recognition unit 8. Reference numeral 8 denotes a voice recognition unit connected to an input unit such as a navigation device or an audio device. A control unit 2 controls the gain adjustment unit 31 based on the detection result of the microphone 11.
【０００４】音声認識率を向上するために、制御部２は
音声認識部８に最適なレベルの信号が入力されるよう
に、マイクロフォン１１で検出した話者の音声信号のレ
ベルを基に、ゲイン調整部３１で調整すべきゲインを制
御する。In order to improve the speech recognition rate, the control unit 2 controls the gain based on the level of the speech signal of the speaker detected by the microphone 11 so that the signal of the optimum level is input to the speech recognition unit 8. The adjusting unit 31 controls a gain to be adjusted.
【０００５】[0005]
【発明が解決しようとする課題】車載用音声認識装置で
は、話者の音声以外に他の同乗者の会話や車両の走行に
伴う騒音もマイクロフォンに入る。また、話者の体格、
運転中の姿勢等により話者の方向、及び話者とマイクロ
フォンの距離が変化する。その結果、音声認識部に入力
されるノイズや信号レベルが変化して、音声認識率が低
下するという問題がある。In a vehicle-mounted voice recognition device, in addition to the voice of a speaker, noises associated with the conversation of other passengers and the traveling of the vehicle also enter the microphone. Also, the physique of the speaker,
The direction of the speaker and the distance between the speaker and the microphone change depending on the posture during driving or the like. As a result, there is a problem that the level of noise or a signal input to the voice recognition unit changes and the voice recognition rate decreases.
【０００６】この対策として、話者の口元にマイクロフ
ォンを固定する接話式のマイクロフォンを使用する方法
もあるが、話者特に運転者には違和感を与える等の問題
がある。本発明は、話者の音声以外のノイズを低減して
音声認識率を向上した車載用音声認識装置を提供するこ
とを目的とする。As a countermeasure, there is a method of using a close-talking microphone in which a microphone is fixed to a mouth of a speaker, but there is a problem that a speaker, particularly a driver, feels strange. SUMMARY OF THE INVENTION It is an object of the present invention to provide an on-vehicle speech recognition device in which noise other than a speaker's speech is reduced and a speech recognition rate is improved.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明は、発話者の方向を検出する方向検出手段と、
発話者の音声を検出する音声検出手段と、前記音声検出
手段の指向特性を前記方向検出手段により検出された発
話者の方向において高めるように調整する指向特性調整
手段と、前記指向特性調整手段により調整された発話者
の音声を認識する音声認識手段を備えたことを特徴とす
るものである。To achieve the above object, the present invention provides a direction detecting means for detecting a direction of a speaker,
Voice detection means for detecting the voice of the speaker, directional characteristics adjustment means for adjusting the directional characteristics of the voice detection means to increase in the direction of the speaker detected by the direction detection means, and the directional characteristics adjustment means It is characterized by comprising voice recognition means for recognizing the adjusted voice of the speaker.
【０００８】また、前記音声検出手段は、複数のマイク
ロフォンで構成され、前記方向検出手段は、前記複数の
マイクロフォンにより検出された検出信号相互間の信号
レベル差に基いて前記発話者の方向を検出するものであ
ることを特徴とするものである。また、前記音声検出手
段は、複数のマイクロフォンで構成され、前記方向検出
手段は、前記複数のマイクロフォンにより検出された検
出信号相互間の遅延時間に基いて前記発話者の方向を検
出するものであることを特徴とするものである。Further, the voice detecting means comprises a plurality of microphones, and the direction detecting means detects the direction of the speaker based on a signal level difference between detection signals detected by the plurality of microphones. It is characterized by doing. Further, the voice detecting means includes a plurality of microphones, and the direction detecting means detects a direction of the speaker based on a delay time between detection signals detected by the plurality of microphones. It is characterized by the following.
【０００９】また、発話者の位置を検出する位置検出手
段を備え、前記方向検出手段は、前記音声検出手段の設
置位置と前記位置検出手段により検出された発話者の位
置に基いて前記発話者の方向を検出するものであること
を特徴とするものである。また、発話者の座席の設定状
態を検出する座席設定状態検出手段を備え、前記位置検
出手段は、前記座席設定状態検出手段により検出された
発話者の座席の設定状態に基いて前記発話者の位置を検
出するものであることを特徴とするものである。[0009] Further, there is provided position detecting means for detecting the position of the speaker, and the direction detecting means is provided on the basis of the installation position of the voice detecting means and the position of the speaker detected by the position detecting means. Is detected. Further, the apparatus further comprises seat setting state detecting means for detecting a setting state of the speaker's seat, wherein the position detecting means detects the speaker's seat based on the speaker setting state detected by the seat setting state detecting means. It is characterized by detecting a position.
【００１０】また、前記音声検出手段は、複数のマイク
ロフォンで構成され、前記指向特性調整手段は、前記複
数のマイクロフォンにより検出された検出信号の利得を
調整して重み付けを行う利得調整手段であることを特徴
とするものである。また、発話者の音声を検出する前面
に管状体が配設されたマイクロフォンと、前記マイクロ
フォンにより検出された発話者の音声を認識する音声認
識手段を備えたことを特徴とするものである。[0010] Further, the voice detecting means is constituted by a plurality of microphones, and the directional characteristic adjusting means is a gain adjusting means for adjusting a gain of a detection signal detected by the plurality of microphones and performing weighting. It is characterized by the following. Further, the present invention is characterized by comprising a microphone having a tubular body disposed on the front surface for detecting the voice of the speaker, and voice recognition means for recognizing the voice of the speaker detected by the microphone.
【００１１】[0011]
【実施例】図１は本発明の第１の実施例の車載用音声認
識装置のシステム構成を示すブロック図である。図２は
複数のマイクロフォンによる話者位検出と指向性調整を
示す図で、（ａ）はマイクロフォン（縦方向配置）と話
者の位置関係を示す図、（ｂ）はマイクロフォン（横方
向配置）と話者の位置関係を示す図である。以下、図に
従って説明する。尚、本例は複数のマイクロフォンの出
力状態から話者の方向を検出し、音声検出部１の指向性
が話者の方向において最大になるようにゲインを調整す
るものである。FIG. 1 is a block diagram showing a system configuration of a vehicle-mounted speech recognition apparatus according to a first embodiment of the present invention. 2A and 2B are diagrams illustrating speaker position detection and directivity adjustment using a plurality of microphones, where FIG. 2A illustrates a positional relationship between a microphone (vertical arrangement) and a speaker, and FIG. 2B illustrates a microphone (horizontal arrangement). It is a figure which shows the positional relationship of a speaker. Hereinafter, description will be made with reference to the drawings. In this example, the direction of the speaker is detected from the output states of the plurality of microphones, and the gain is adjusted so that the directivity of the voice detection unit 1 is maximized in the direction of the speaker.
【００１２】１は運転者や同乗者の音声を電気信号に変
換する音声検出部（音声検出手段）で、所定の間隔で配
置された複数の無指向性のマイクロフォン１１、１２、
１３で構成される。３１はマイクロフォン１１、１２、
１３の出力を個々に調整して音声検出部１全体として話
者の方向に指向性をもたせるためのゲイン調整部で、電
子ボリューム等で構成される。８はナビゲーション機器
やオーディオ機器等の入力部に接続される音声認識部で
あり、この音声認識部８が認識した結果に応じて、ナビ
ゲーション機器やオーディオ機器の動作が制御されるこ
とになる。２はマイクロフォン１１、１２、１３の出力
レベルまたは遅延時間を基に話者の方向を検出し、各マ
イクロフォン１１、１２、１３の出力を調整するゲイン
調整部３１を制御する制御部である。２１は音声検出部
１により検出した話者の方向とゲイン調整部３１の調整
値を対応させて記憶するメモリである。Reference numeral 1 denotes a voice detection unit (voice detection means) for converting a voice of a driver or a passenger into an electric signal, and includes a plurality of omnidirectional microphones 11, 12 arranged at predetermined intervals.
13. 31 is a microphone 11, 12,
13 is a gain adjustment unit for individually adjusting the outputs of the voice detection unit 1 to provide directivity in the direction of the speaker as a whole of the voice detection unit 1, and is configured by an electronic volume or the like. Reference numeral 8 denotes a voice recognition unit connected to an input unit of a navigation device, an audio device, or the like. The operation of the navigation device or the audio device is controlled in accordance with the result recognized by the voice recognition unit 8. A control unit 2 detects the direction of the speaker based on the output levels or delay times of the microphones 11, 12, and 13, and controls a gain adjustment unit 31 that adjusts the outputs of the microphones 11, 12, and 13. Reference numeral 21 denotes a memory that stores the direction of the speaker detected by the voice detection unit 1 and the adjustment value of the gain adjustment unit 31 in association with each other.
【００１３】先ず、マイクロフォン１１、１２、１３に
よる話者の方向検出方法について述べる。図２（ａ）に
おいて話者８１の発声する音声は３つのマイクロフォン
１１、１２、１３において信号レベルＶ１１、Ｖ１２、
Ｖ１３と遅延時間ｔ１１、ｔ１２、ｔ１３が検出され
る。この場合、遅延時間は信号の立上りを検出して、い
ずれか１つのマイクロフォン（例えば中央のマイクロフ
ォン１２）を基準にした相対的な遅延時間でもよい。マ
イクロフォンの出力特性が同じになるように予め調整さ
れていると信号レベルは話者８１とマイクロフォン１
１、１２、１３の距離に応じて低下する。また、遅延時
間は話者８１とマイクロフォン１１、１２、１３の距離
の差に比例して長くなる。従って、マイクロフォン１
１、１２、１３の位置関係が判っておれば話者の方向が
算出できる。First, a method for detecting the direction of a speaker using the microphones 11, 12, and 13 will be described. In FIG. 2A, the voice uttered by the speaker 81 is output from three microphones 11, 12, and 13 at signal levels V11, V12,
V13 and delay times t11, t12, t13 are detected. In this case, the delay time may be a relative delay time with respect to any one of the microphones (for example, the central microphone 12) by detecting the rise of the signal. If the output characteristics of the microphones are adjusted in advance so as to be the same, the signal level becomes equal to that of the speaker 81 and the microphone 1
It decreases according to the distance of 1, 12, and 13. The delay time becomes longer in proportion to the difference between the distance between the speaker 81 and the microphones 11, 12, and 13. Therefore, microphone 1
If the positional relationship of 1, 12, and 13 is known, the direction of the speaker can be calculated.
【００１４】予め、話者８１の方向と各マイクロフォン
１１、１２、１３からの信号レベルＶ１１、Ｖ１２、Ｖ
１３及び遅延時間ｔ１１、ｔ１２、ｔ１３の関係をメモ
リ２１に記憶しておく。そして、実際にマイクロフォン
１１、１２、１３で信号レベル及び遅延時間を検出し
て、メモリ２１に記憶されている信号レベル及び遅延時
間と話者の方向の関係を使用して話者の方向を算出す
る。The directions of the speaker 81 and the signal levels V11, V12, V from the microphones 11, 12, 13 are determined in advance.
13 and the relationship between the delay times t11, t12, and t13 are stored in the memory 21. Then, the signal levels and delay times are actually detected by the microphones 11, 12, and 13, and the direction of the speaker is calculated using the relationship between the signal levels and delay times stored in the memory 21 and the direction of the speaker. I do.
【００１５】次に、音声検出部１の指向性調整方法につ
いて述べる。３つのマイクロフォン１１、１２、１３を
図２（ａ）のごとく話者に対して縦方向に配置して、各
マイクロフォン１１、１２、１３の信号レベルに対する
調整すべきゲインをＧ１１、Ｇ１２、Ｇ１３とし、マイ
クロフォン１１、１２、１３のゲインが同じになるよう
に調整（Ｇ１１＝Ｇ１２＝Ｇ１３）すると、音声検出部
１の指向性は話者８１の方向が強く、斜めまたは横方向
が弱くなるようにできる。Next, a method of adjusting the directivity of the voice detection unit 1 will be described. As shown in FIG. 2A, three microphones 11, 12, and 13 are arranged vertically with respect to the speaker, and the gains to be adjusted for the signal levels of the microphones 11, 12, and 13 are G11, G12, and G13. When the gains of the microphones 11, 12, and 13 are adjusted to be the same (G11 = G12 = G13), the directivity of the voice detection unit 1 is set such that the direction of the speaker 81 is strong and the oblique or lateral direction is weak. it can.
【００１６】また、３つのマイクロフォン１１、１２、
１３を図２（ｂ）のごとく話者に対して横方向に配置し
て、マイクロフォン１１、１２、１３の順にゲインが高
くなるように調整（Ｇ１１＜Ｇ１２＜Ｇ１３）すると、
音声検出部１の指向性は話者８１ａの方向が強くなるよ
うにできる。一方、マイクロフォン１３、１２、１１の
順にゲインが高くなるように調整（Ｇ１３＜Ｇ１２＜Ｇ
１１）すると、音声検出部１の指向性は話者８１ｂの方
向が強くなるようにできる。さらに、マイクロフォン１
２のゲインをマイクロフォン１１、１３のゲインよりも
高くなるように調整（Ｇ１１≦Ｇ１２≧Ｇ１３）する
と、音声検出部１の指向性は中央部の話者８１ｃの方向
が強くなるようにできる。In addition, three microphones 11, 12,
When the microphones 13 are arranged laterally with respect to the speaker as shown in FIG. 2B and the gains are adjusted in the order of the microphones 11, 12, and 13 (G11 <G12 <G13),
The directivity of the voice detection unit 1 can be such that the direction of the speaker 81a is strong. On the other hand, adjustment is performed so that the gain becomes higher in the order of the microphones 13, 12, and 11 (G13 <G12 <G
11) Then, the directivity of the voice detection unit 1 can be set so that the direction of the speaker 81b is strong. In addition, microphone 1
By adjusting the gain of No. 2 to be higher than the gains of the microphones 11 and 13 (G11 ≦ G12 ≧ G13), the directivity of the voice detection unit 1 can be made stronger in the direction of the speaker 81c in the center.
【００１７】予め、話者の方向とゲイン調整部３１にお
いて話者の方向の指向性が最大になるように調整すべき
ゲインＧ１１、Ｇ１２、Ｇ１３をメモリ２１に記憶させ
ておき、話者の方向が検出できた時には、マイクロフォ
ン１１、１２、１３の出力信号に対して話者の方向に対
応したゲイン調整を行う。このようにして、話者の方向
の音声検出部１の指向性を高め、その他の方向の指向性
を低く抑えることにより同乗者の会話や車両からのノイ
ズが低減された音声信号が音声認識部８に入力されるの
で、話者の音声の認識率が向上する。The gains G11, G12, and G13 to be adjusted so that the directivity of the speaker direction and the direction of the speaker are maximized in the gain adjuster 31 are stored in the memory 21 in advance. Is detected, the gain adjustment corresponding to the direction of the speaker is performed on the output signals of the microphones 11, 12, and 13. In this way, by increasing the directivity of the voice detection unit 1 in the direction of the speaker and suppressing the directivity in the other directions to a low level, the voice signal in which the conversation of the fellow passengers and the noise from the vehicle are reduced is converted to the voice recognition unit. 8, the recognition rate of the speaker's voice is improved.
【００１８】尚、３つのマイクロフォン１１、１２、１
３を１つの筐体内に一体として組合せたコンパクトなユ
ニット（音声検出部１に相当）を構成し、車内のマップ
ランプやルームランプ裏面に設置してもよく、また、３
つのマイクロフォン１１、１２、１３を個々に離れた箇
所（例えば、左右のフロントピラー内部とルームランプ
裏面）に設置してもよい。３つのマイクロフォンを離し
て設置した方が話者の方向識別が容易になる。The three microphones 11, 12, 1
3 may be integrated into one housing to form a compact unit (corresponding to the voice detection unit 1), which may be installed on the back of a map lamp or room lamp in the vehicle.
The two microphones 11, 12, and 13 may be installed separately (for example, inside the left and right front pillars and the back of the room lamp). If the three microphones are located apart from each other, the direction of the speaker can be easily identified.
【００１９】また、図２（ｂ）のマイクロフォンの配置
において、予め、３つのマイクロフォン１１、１２、１
３からなる音声検出部１の指向性が運転席（話者８１
ｂ）の方向において最大になるように調整すべき各ゲイ
ン（Ｇ１１、Ｇ１２、Ｇ１３）と、助手席（話者８１
ａ）の方向において最大になるように調整すべきゲイン
の２種類をメモリ２１に記憶しておくことにより、運転
席、助手席のいずれの話者（８１ａ、８１ｂ）に対して
も話者の方向を識別し、その話者に対して音声検出部１
の検出信号にゲイン調整して、話者の方向に指向性を持
たせることができる。つまり、１つの音声検出部１で運
転席、助手席のいずれからでもナビゲーション機器やオ
ーディオ機器に対して認識率のよい入力処理が行える。In the arrangement of the microphones shown in FIG. 2B, three microphones 11, 12, 1
The directivity of the voice detection unit 1 composed of the driver seat (speaker 81)
Each gain (G11, G12, G13) to be adjusted to be maximum in the direction of b) and a passenger seat (speaker 81)
By storing in the memory 21 two types of gains to be adjusted so as to be maximum in the direction of a), the speaker (81a, 81b) of either the driver's seat or the front passenger's seat can be used as a speaker. The direction is identified, and the voice detector 1
Can be adjusted to gain directivity in the direction of the speaker. In other words, one voice detection unit 1 can perform input processing with a high recognition rate on navigation equipment and audio equipment from either the driver's seat or the passenger's seat.
【００２０】以上のように本実施例では、複数のマイク
ロフォンにより話者の方向を検出して、その検出結果を
基に音声検出部の指向性を話者の方向において最大にな
るように調整するので、話者の音声信号が大きく、同乗
者の会話及び車両騒音等のノイズが低減でき、認識度の
高い音声認識装置ができる。図３は本発明の第２の実施
例の車載用音声認識装置のシステム構成を示すブロック
図である。図４は座席のスライド位置、座面高さ、背も
たれ角を説明するための図である。以下、図に従って説
明する。尚、本例は運転席の座席の設定状態から話者の
方向を検出するものであり、話者の方向を検出した後の
音声検出部１の指向性調整は第１の実施例と同様であ
る。As described above, in this embodiment, the direction of the speaker is detected by a plurality of microphones, and the directivity of the voice detection unit is adjusted to be maximum in the direction of the speaker based on the detection result. Therefore, the voice signal of the speaker is large, noises such as conversation of the fellow passengers and vehicle noise can be reduced, and a voice recognition device with a high degree of recognition can be obtained. FIG. 3 is a block diagram showing a system configuration of a vehicle-mounted speech recognition device according to a second embodiment of the present invention. FIG. 4 is a diagram for explaining the sliding position of the seat, the height of the seat surface, and the angle of the backrest. Hereinafter, description will be made with reference to the drawings. In this example, the direction of the speaker is detected from the setting state of the driver's seat, and the directivity adjustment of the voice detection unit 1 after detecting the direction of the speaker is the same as in the first embodiment. is there.
【００２１】４は車両の運転席（または助手席）の座席
の設定状態を検出する座席状態検出部（座席設定状態検
出手段）で、座席の前後方向の位置を検出するスライド
位置センサ４１、座席の上下方向の位置を検出する座面
高さセンサ４２、背もたれの角度を検出する背もたれ角
センサ４３で構成される。尚、スライド位置センサ４
１、座面高さセンサ４２は移動量（長さ）を検出するセ
ンサで、例えば、スリットと光学センサの組合せで移動
量に応じて発生するパルス数を計測する。背もたれ角セ
ンサ４３は角度を検出するセンサで、例えば、ボリュー
ム等を使用して回転角に応じて変化する抵抗値（または
電圧値）を計測する。また、座席の設定状態が電動で調
整できるもの（電動シート）にあっては、特別にセンサ
４１、４２、４３を設けず、座席の設定（移動）を行う
モータの駆動量を計測しておき、その計測した駆動量で
代用してもよい。２は座席状態検出部４の検出結果に基
いて運転者（話者）の位置を検出し、音声検出部１と運
転者の位置から話者の方向を検出する制御部である。ま
た、制御部２は予め音声検出部１及び座席状態検出部４
の検出結果と話者の方向が対応して記憶したメモリ２１
を有する。７１は運転者用の座席で、座面部７１ａ、背
もたれ部７１ｂ、ヘッドレスト部７１ｃで構成される。
尚、音声検出部１、マイクロフォン１１、１２、１３、
制御部２、メモリ２１、音声認識部８、ゲイン調整部３
１は第１の実施例と名称、機能及び作用が同じであるた
め同一番号を付し説明は省略する。Reference numeral 4 denotes a seat state detecting unit (seat setting state detecting means) for detecting a setting state of a driver's seat (or a passenger seat) of the vehicle, and a slide position sensor 41 for detecting a position of the seat in the front-rear direction; And a backrest angle sensor 43 for detecting the angle of the backrest. The slide position sensor 4
1. The seat height sensor 42 is a sensor that detects the amount of movement (length). For example, the number of pulses generated according to the amount of movement by a combination of a slit and an optical sensor is measured. The backrest angle sensor 43 is a sensor that detects an angle, and measures a resistance value (or a voltage value) that changes according to the rotation angle using, for example, a volume. In the case where the setting state of the seat can be adjusted electrically (electric seat), the driving amount of the motor for setting (moving) the seat is measured without special sensors 41, 42 and 43. Alternatively, the measured drive amount may be used instead. Reference numeral 2 denotes a control unit that detects the position of the driver (speaker) based on the detection result of the seat state detection unit 4, and detects the direction of the speaker from the voice detection unit 1 and the position of the driver. In addition, the control unit 2 has a voice detection unit 1 and a seat state detection unit 4 in advance.
21 in which the detection result of the speaker and the direction of the speaker are stored correspondingly.
Having. Reference numeral 71 denotes a driver's seat, which includes a seat surface portion 71a, a backrest portion 71b, and a headrest portion 71c.
Note that the voice detection unit 1, the microphones 11, 12, 13,
Control unit 2, memory 21, voice recognition unit 8, gain adjustment unit 3
1 has the same name, function, and operation as those of the first embodiment, so that the same reference numerals are assigned and the description is omitted.
【００２２】予め、運転者が着席した状態で最適な座席
の状態、つまり、座席のスライド位置Ｄ１、座面高さＨ
１、背もたれ角θ１をスライド位置センサ４１、座面高
さセンサ４２、背もたれ角センサ４３により検出して、
車両の天井部７０ｂとフロントガラス７０ａの上部の間
に設置された位置検出部１に対する話者の方向をメモリ
２１に記憶しておく。The optimum seating condition when the driver is seated in advance, that is, the sliding position D1 of the seat and the seat height H
1. The back angle θ1 is detected by the slide position sensor 41, the seat height sensor 42, and the back angle sensor 43,
The direction of the speaker with respect to the position detector 1 installed between the ceiling 70b of the vehicle and the upper part of the windshield 70a is stored in the memory 21.
【００２３】次に、運転者が座席に座った時に調整した
座席の状態をスライド位置センサ４１、座面高さセンサ
４２、背もたれ角センサ４３により検出して、メモリ２
１に記憶された座席状態と方向の関係から話者の方向を
検出する。話者の方向が検出されると、第１の実施例と
同様に各マイクロフォン１１、１２、１３に対応したゲ
インＧ１１、Ｇ１２、Ｇ１３で調整して話者の方向にお
ける指向性を最大にする。その結果、運転者の体格、姿
勢が異なって座席位置及び背もたれ角度が変化しても、
常に最適なマイク指向性が得られる。Next, the state of the seat adjusted when the driver sits on the seat is detected by the slide position sensor 41, the seat height sensor 42, and the backrest angle sensor 43, and the memory 2
The direction of the speaker is detected from the relationship between the seat state and the direction stored in 1. When the direction of the speaker is detected, the directivity in the direction of the speaker is maximized by adjusting the gains G11, G12, and G13 corresponding to the microphones 11, 12, and 13, as in the first embodiment. As a result, even if the physique and posture of the driver are different and the seat position and the backrest angle change,
The optimum microphone directivity is always obtained.
【００２４】以上のように本実施例では、座席位置によ
り話者の方向を検出して、その検出結果を基に音声検出
部の指向性を話者の方向において最大になるように調整
するので、話者の音声信号が大きく、同乗者の会話及び
車両騒音等のノイズが低減でき、認識度の高い音声認識
装置ができる。図５は本発明の第３の実施例の車載用音
声認識装置のマイクロフォンの設置状態を説明するため
の図である。以下、図に従って説明する。尚、本例は無
指向性のマイクロフォンを使用して話者の方向に音声検
出部の指向性が最大になるようにするものである。As described above, in this embodiment, the direction of the speaker is detected based on the seat position, and the directivity of the voice detection unit is adjusted so as to be maximum in the direction of the speaker based on the detection result. In addition, the voice signal of the speaker is large, the noise of the fellow passengers and the noise such as the vehicle noise can be reduced, and a voice recognition device with a high degree of recognition can be obtained. FIG. 5 is a diagram for explaining the installation state of the microphone of the vehicle-mounted voice recognition device according to the third embodiment of the present invention. Hereinafter, description will be made with reference to the drawings. In this example, the directivity of the voice detection unit is maximized in the direction of the speaker using a non-directional microphone.
【００２５】車両の内装材面７２ａにパイプ７５を介し
てマイクロフォン１１を設置することにより、パイプ７
５の開口径φ及び長さＬで限定された方向の音がマイク
ロフォン１１により選択的に検出され、その他の方向の
音は検出されないようにできる。パイプ７５の方向を予
め話者の方向と一致するように調整しておくことにより
同乗者の会話及びノイズが低減できる。By installing the microphone 11 on the interior material surface 72a of the vehicle via a pipe 75,
The sound in the direction defined by the opening diameter φ and the length L of 5 can be selectively detected by the microphone 11, and the sound in other directions can be prevented from being detected. By adjusting the direction of the pipe 75 in advance so as to match the direction of the speaker, conversation and noise of the fellow passenger can be reduced.
【００２６】以上のように本実施例では、音声検出部の
指向性を話者の方向において最大になるように設置する
ので、話者の音声信号が大きく、同乗者の会話及び車両
騒音等のノイズが低減でき、認識度の高い音声認識装置
ができる。As described above, in the present embodiment, since the directivity of the voice detection unit is set to be maximum in the direction of the speaker, the voice signal of the speaker is large, and the conversation of the fellow passengers and the noise of the vehicle are reduced. Noise can be reduced and a speech recognition device with a high degree of recognition can be obtained.
【００２７】[0027]
【発明の効果】以上説明したように、本発明では、話者
の音声以外のノイズを低減して音声認識率を向上した車
載用音声認識装置が提供できる。As described above, according to the present invention, it is possible to provide an on-vehicle speech recognition apparatus in which noise other than the speech of the speaker is reduced and the speech recognition rate is improved.
【図１】本発明の第１の実施例の車載用音声認識装置の
システム構成を示すブロック図である。FIG. 1 is a block diagram showing a system configuration of a vehicle-mounted speech recognition device according to a first embodiment of the present invention.
【図２】複数のマイクロフォンによる話者位検出と指向
性調整を示す図である。FIG. 2 is a diagram illustrating speaker position detection and directivity adjustment using a plurality of microphones.
【図３】本発明の第２の実施例の車載用音声認識装置の
システム構成を示すブロック図である。FIG. 3 is a block diagram showing a system configuration of a vehicle-mounted voice recognition device according to a second embodiment of the present invention.
【図４】座席の座面高さ、スライド位置、背もたれ角を
示す図である。FIG. 4 is a diagram showing a seat height, a sliding position, and a backrest angle of a seat.
【図５】本発明の第３の実施例の車載用音声認識装置の
マイクロフォンの設置状態を示す図である。FIG. 5 is a diagram showing an installation state of a microphone of a vehicle-mounted voice recognition device according to a third embodiment of the present invention.
【図６】従来の車載用音声認識装置のシステム構成を示
すブロック図である。FIG. 6 is a block diagram showing a system configuration of a conventional in-vehicle speech recognition device.
１・・・・・音声検出部、 ４３・・・
・背もたれ角センサ、１１、１２、１３・・・・マイク
ロフォン、２・・・・・制御部、４・・・・・座席状態
検出部、 ２１・・・・メモリ、４１・・・
・スライド位置センサ、 ３１・・・・ゲイン調
整部、４２・・・・座面高さセンサ、 ８・
・・・・音声認識部。1 ····· Sound detection unit 43 ···
· Backrest angle sensor, 11, 12, 13 ··· Microphone, 2 ··· Control unit, 4 ··· Seat state detecting unit, 21 ··· Memory, 41 ···
・ Slide position sensor 31 ・ ・ ・ ・ Gain adjustment unit ・ 42 ・ ・ ・ Seat height sensor ・ 8 ・
... Voice recognition unit.
Claims (7)
と、 発話者の音声を検出する音声検出手段と、 前記音声検出手段の指向特性を前記方向検出手段により
検出された発話者の方向において高めるように調整する
指向特性調整手段と、 前記指向特性調整手段により調整された発話者の音声を
認識する音声認識手段を備えたことを特徴とする車載用
音声認識装置。1. A direction detecting means for detecting a direction of a speaker, a voice detecting means for detecting a voice of the speaker, and a directional characteristic of the voice detecting means in a direction of the speaker detected by the direction detecting means. An in-vehicle voice recognition device, comprising: a directional characteristic adjustment unit that adjusts to increase the utterance; and a voice recognition unit that recognizes the voice of the speaker adjusted by the directional characteristic adjustment unit.
ォンで構成され、 前記方向検出手段は、前記複数のマイクロフォンにより
検出された検出信号相互間の信号レベル差に基いて前記
発話者の方向を検出するものであることを特徴とする請
求項１記載の車載用音声認識装置。2. The voice detecting means comprises a plurality of microphones, and the direction detecting means detects the direction of the speaker based on a signal level difference between detection signals detected by the plurality of microphones. The in-vehicle speech recognition device according to claim 1, wherein
ォンで構成され、 前記方向検出手段は、前記複数のマイクロフォンにより
検出された検出信号相互間の遅延時間に基いて前記発話
者の方向を検出するものであることを特徴とする請求項
１記載の車載用音声認識装置。3. The voice detecting means comprises a plurality of microphones, and the direction detecting means detects the direction of the speaker based on a delay time between detection signals detected by the plurality of microphones. The in-vehicle speech recognition device according to claim 1, wherein the device is a speech recognition device.
備え、 前記方向検出手段は、前記音声検出手段の設置位置と前
記位置検出手段により検出された発話者の位置に基いて
前記発話者の方向を検出するものであることを特徴とす
る請求項１記載の車載用音声認識装置。4. A position detecting means for detecting a position of a speaker, wherein the direction detecting means is configured to detect the position of the voice detecting means and a position of the speaker detected by the position detecting means. 2. The in-vehicle speech recognition device according to claim 1, wherein the direction of the speech recognition is detected.
設定状態検出手段を備え、 前記位置検出手段は、前記座席設定状態検出手段により
検出された発話者の座席の設定状態に基いて前記発話者
の位置を検出するものであることを特徴とする請求項４
記載の車載用音声認識装置。5. A seat setting state detecting means for detecting a setting state of a speaker's seat, wherein the position detecting means detects the speaker's seat setting state detected by the seat setting state detecting means. 5. The method according to claim 4, wherein the position of the speaker is detected.
The in-vehicle speech recognition device according to the above.
ォンで構成され、 前記指向特性調整手段は、前記複数のマイクロフォンに
より検出された検出信号の利得を調整して重み付けを行
う利得調整手段であることを特徴とする請求項１記載の
車載用音声認識装置。6. The sound detecting means is constituted by a plurality of microphones, and the directional characteristic adjusting means is a gain adjusting means for adjusting a gain of a detection signal detected by the plurality of microphones to perform weighting. The in-vehicle speech recognition device according to claim 1, wherein:
配設されたマイクロフォンと、 前記マイクロフォンにより検出された発話者の音声を認
識する音声認識手段を備えたことを特徴とする車載用音
声認識装置。7. A vehicle-mounted vehicle comprising: a microphone having a tubular body disposed on a front surface for detecting a voice of a speaker; and voice recognition means for recognizing the voice of the speaker detected by the microphone. Voice recognition device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02197598A JP4005203B2 (en) | 1998-02-03 | 1998-02-03 | In-vehicle speech recognition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02197598A JP4005203B2 (en) | 1998-02-03 | 1998-02-03 | In-vehicle speech recognition device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11219193A true JPH11219193A (en) | 1999-08-10 |
| JP4005203B2 JP4005203B2 (en) | 2007-11-07 |
Family
ID=12070043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02197598A Expired - Lifetime JP4005203B2 (en) | 1998-02-03 | 1998-02-03 | In-vehicle speech recognition device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4005203B2 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001236093A (en) * | 2000-02-24 | 2001-08-31 | Omron Corp | Electronic equipment controller and electronic equipment |
| JP2003061184A (en) * | 2001-08-14 | 2003-02-28 | Sony Corp | Information processing apparatus and method, information generating device and method, recording medium and program |
| JP2003084795A (en) * | 2001-09-10 | 2003-03-19 | Kenwood Corp | On-vehicle voice recognition system |
| JP2003524217A (en) * | 2000-02-25 | 2003-08-12 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Speech recognition apparatus with reference conversion means |
| JP2003271196A (en) * | 2002-03-18 | 2003-09-25 | Sony Corp | Robot system and method for controlling the same |
| JP2004053581A (en) * | 2002-04-17 | 2004-02-19 | Daimler Chrysler Ag | Method of detecting direction of line of sight by microphone |
| WO2006025106A1 (en) * | 2004-09-01 | 2006-03-09 | Hitachi, Ltd. | Voice recognition system, voice recognizing method and its program |
| JP2007118675A (en) * | 2005-10-26 | 2007-05-17 | Honda Motor Co Ltd | Blow-off controller of air conditioner for railroad vehicle |
| JP2008087759A (en) * | 2006-10-02 | 2008-04-17 | Harman Becker Automotive Systems Gmbh | Voice control of vehicular element from outside of vehicle compartment |
| JP2011102984A (en) * | 2010-11-30 | 2011-05-26 | Sony Corp | Navigation device, voice recognition method, and program |
| JP2013102268A (en) * | 2011-11-07 | 2013-05-23 | Honda Access Corp | Microphone array arrangement structure in compartment |
| JPWO2014125860A1 (en) * | 2013-02-12 | 2017-02-02 | 日本電気株式会社 | Audio processing device, audio processing method, audio processing program, audio processing device mounting method, ceiling member, and vehicle |
| JP2017044852A (en) * | 2015-08-26 | 2017-03-02 | アイシン精機株式会社 | Vocalization direction specification device |
| WO2017078361A1 (en) * | 2015-11-02 | 2017-05-11 | Samsung Electronics Co., Ltd. | Electronic device and method for recognizing speech |
| JP2018006917A (en) * | 2016-06-29 | 2018-01-11 | クラリオン株式会社 | Sound collection device |
| JP2019087986A (en) * | 2017-09-14 | 2019-06-06 | 富士通株式会社 | Sound source direction determination device, sound source direction determination method, and sound source direction determination program |
| JP2021078042A (en) * | 2019-11-12 | 2021-05-20 | 本田技研工業株式会社 | Vehicle device, vehicle, operation of vehicle device, and program |
-
1998
- 1998-02-03 JP JP02197598A patent/JP4005203B2/en not_active Expired - Lifetime
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001236093A (en) * | 2000-02-24 | 2001-08-31 | Omron Corp | Electronic equipment controller and electronic equipment |
| JP2012234204A (en) * | 2000-02-25 | 2012-11-29 | Nuance Communications Austria Gmbh | Voice recognition device having reference conversion means and method |
| JP2003524217A (en) * | 2000-02-25 | 2003-08-12 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Speech recognition apparatus with reference conversion means |
| JP2003061184A (en) * | 2001-08-14 | 2003-02-28 | Sony Corp | Information processing apparatus and method, information generating device and method, recording medium and program |
| JP2003084795A (en) * | 2001-09-10 | 2003-03-19 | Kenwood Corp | On-vehicle voice recognition system |
| JP2003271196A (en) * | 2002-03-18 | 2003-09-25 | Sony Corp | Robot system and method for controlling the same |
| JP2004053581A (en) * | 2002-04-17 | 2004-02-19 | Daimler Chrysler Ag | Method of detecting direction of line of sight by microphone |
| WO2006025106A1 (en) * | 2004-09-01 | 2006-03-09 | Hitachi, Ltd. | Voice recognition system, voice recognizing method and its program |
| JP2007118675A (en) * | 2005-10-26 | 2007-05-17 | Honda Motor Co Ltd | Blow-off controller of air conditioner for railroad vehicle |
| JP2008087759A (en) * | 2006-10-02 | 2008-04-17 | Harman Becker Automotive Systems Gmbh | Voice control of vehicular element from outside of vehicle compartment |
| JP2011102984A (en) * | 2010-11-30 | 2011-05-26 | Sony Corp | Navigation device, voice recognition method, and program |
| JP2013102268A (en) * | 2011-11-07 | 2013-05-23 | Honda Access Corp | Microphone array arrangement structure in compartment |
| US9426553B2 (en) | 2011-11-07 | 2016-08-23 | Honda Access Corp. | Microphone array arrangement structure in vehicle cabin |
| JPWO2014125860A1 (en) * | 2013-02-12 | 2017-02-02 | 日本電気株式会社 | Audio processing device, audio processing method, audio processing program, audio processing device mounting method, ceiling member, and vehicle |
| JP2017044852A (en) * | 2015-08-26 | 2017-03-02 | アイシン精機株式会社 | Vocalization direction specification device |
| WO2017078361A1 (en) * | 2015-11-02 | 2017-05-11 | Samsung Electronics Co., Ltd. | Electronic device and method for recognizing speech |
| CN108352159A (en) * | 2015-11-02 | 2018-07-31 | 三星电子株式会社 | The electronic equipment and method of voice for identification |
| US10540995B2 (en) | 2015-11-02 | 2020-01-21 | Samsung Electronics Co., Ltd. | Electronic device and method for recognizing speech |
| JP2018006917A (en) * | 2016-06-29 | 2018-01-11 | クラリオン株式会社 | Sound collection device |
| US10889221B2 (en) | 2016-06-29 | 2021-01-12 | Clarion Co., Ltd. | Sound pickup device |
| JP2019087986A (en) * | 2017-09-14 | 2019-06-06 | 富士通株式会社 | Sound source direction determination device, sound source direction determination method, and sound source direction determination program |
| JP2021078042A (en) * | 2019-11-12 | 2021-05-20 | 本田技研工業株式会社 | Vehicle device, vehicle, operation of vehicle device, and program |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4005203B2 (en) | 2007-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4005203B2 (en) | In-vehicle speech recognition device | |
| EP1908640B1 (en) | Voice control of vehicular elements from outside a vehicular cabin | |
| US8688458B2 (en) | Actuator control of adjustable elements by speech localization in a vehicle | |
| CN111489750B (en) | Sound processing apparatus and sound processing method | |
| EP3163573A1 (en) | Speech collector in car cabin | |
| WO2016103710A1 (en) | Voice processing device | |
| US20040170286A1 (en) | Method for controlling an acoustic system in a vehicle | |
| WO2016143340A1 (en) | Speech processing device and control device | |
| JP2009124540A (en) | Vehicle call device, and calling method | |
| JP2006094389A (en) | In-vehicle conversation assisting device | |
| JP2017069806A (en) | Speaker array device | |
| US10623853B2 (en) | Microphone system for a motor vehicle with dynamic directivity | |
| JPH1165587A (en) | Vehicular voice input device | |
| JP2016063439A (en) | In-cabin conversation apparatus | |
| JP2017069805A (en) | On-vehicle acoustic device | |
| US20200007690A1 (en) | Acoustic echo suppression device and acoustic echo suppression method | |
| JP2001352595A (en) | Voice input device | |
| KR100242193B1 (en) | Audio volume control method and volume control device of a car | |
| KR101851144B1 (en) | Sound receiving apparatus, vehicle having the same and method for controlling the same | |
| JP2002171587A (en) | Sound volume regulator for on-vehicle acoustic device and sound recognition device using it | |
| JP5122414B2 (en) | In-car conversation assist device | |
| JP2000322074A (en) | Voice input section determination device, aural data extraction device, speech recognition device, vehicle navigation device and input microphone | |
| JP2009073417A (en) | Apparatus and method for controlling noise | |
| JP6978888B2 (en) | Sensitivity adjustment device, in-vehicle system, car headrest and signal processing device | |
| JP6775897B2 (en) | In-car conversation support device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050203 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050203 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20070403 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070424 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070530 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070821 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070823 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100831 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100831 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110831 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110831 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120831 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130831 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140831 Year of fee payment: 7 |
|
| EXPY | Cancellation because of completion of term |