JPH033540A - Voice command type automobile telephone set - Google Patents

Voice command type automobile telephone set

Info

Publication number
JPH033540A
JPH033540A JP1137829A JP13782989A JPH033540A JP H033540 A JPH033540 A JP H033540A JP 1137829 A JP1137829 A JP 1137829A JP 13782989 A JP13782989 A JP 13782989A JP H033540 A JPH033540 A JP H033540A
Authority
JP
Japan
Prior art keywords
voice
command
noise
registered
signal
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.)
Pending
Application number
JP1137829A
Other languages
Japanese (ja)
Inventor
Yoji Ito
伊藤 洋治
Masanori Tani
谷 正紀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP1137829A priority Critical patent/JPH033540A/en
Publication of JPH033540A publication Critical patent/JPH033540A/en
Pending legal-status Critical Current

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  • Mobile Radio Communication Systems (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To prevent the reduction in the voice recognition rate under noise by fetching a background noise just before the reception of a registered voice or a command voice and eliminating the background noise from the received voice or the command voice. CONSTITUTION:When a registration switch 5 or a command switch 6 is thrown to a contact 5b or 6b, a noise signal processing circuit 4 receives a signal outputted from an amplifier 2 and outputs a noise signal eN. A subtraction circuit 7 receives output signals eV, eN of a voice signal processing circuit 3 and a noise signal processing circuit 4 and subtracts the signal eN from the signal eV to output only a voice signal (e). A voice recognition computer 8 receives the voice signal (e) and when the voice registration switch 5 is thrown to the position of the contact 5a, the said voice is registered and when the command switch 6 is thrown to the position of the contact 6a, the command voice is collated with the registered voice and when they are coincident, the content registered in response to the said command voice is displayed on a display section. Thus, the reduction in the recognition rate under noise is prevented.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、ボイスコマンド式自動車電話機に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a voice command type car telephone.

(従来の技術及び解決すべき課題) 運転者が自動車を運転中に自動車電話機のハンドセット
(送受器)により相手局と交信する場合、自動車の運転
と電話機の操作とを同時に行うと安全運転上問題があり
、運転者がハンドセットを取り上げることなく電話機を
操作できることが好ましい。
(Prior art and problems to be solved) When a driver communicates with a partner station using the handset of a car phone while driving a car, there are problems with safe driving if the driver drives the car and operates the phone at the same time. It is preferable that the driver be able to operate the telephone without picking up the handset.

そこで、通常のハンドセット電話機と、運転席の前方の
インストルメントパネル等にスピーカとマイクロホンと
を配置したハンドフリー電話機とを備え、運転者が電話
機を使用する場合にはハンドフリー電話機に切り替え、
当該運転者が音声により相手局の選局、呼び出し等を行
ない、相手方との通話はマイクロホンとスピーカとによ
り行なうようにした自動車電話機が知られている。
Therefore, we have a regular handset phone and a hands-free phone with a speaker and microphone placed on the instrument panel in front of the driver's seat, and when the driver uses the phone, he can switch to the hands-free phone.
2. Description of the Related Art Car telephones are known in which the driver selects and calls the other party's station by voice, and communicates with the other party using a microphone and a speaker.

音声により相手方の選局、呼び出し等を行なう所謂ボイ
スコマンド式自動車電話は、多数の登録音声の中からコ
マンド音声と一致する又は最も近似したものを捜し出し
、該当するものが有ればこれを表示し、ない場合には例
えば、“もう−度いって下さい”を表示して運転者に再
度コマンド音声を要求する方式のものである。
A so-called voice command type car phone, which uses voice to select or call the other party, searches for the one that matches or most closely resembles the command voice from among a large number of registered voices, and displays the corresponding voice if one is found. If there is no command, for example, the message "Please try again" is displayed and the driver is requested to speak the command again.

ところが、登録時に受け付けた音声と、コマンド時に受
け付けた音声とでは、静かな環境下でも認識率はせいぜ
い80〜90%であり、しかも、各々の場合の走行時の
ノイズ等の外部ノイズを加味すると認識率は更に低下し
、場合によっては何回もコマンド音声を繰り返す必要が
有り、使い難く実用的でないという問題がある。
However, the recognition rate is at most 80-90% between the voices accepted at registration and the voices accepted at command, even in a quiet environment, and when external noise such as noise from driving in each case is taken into account. The recognition rate further decreases, and in some cases it is necessary to repeat the command voice many times, making it difficult to use and impractical.

本発明は上述の点に鑑みてなされたもので、受け付けた
音声からバックグランドノイズを除去してノイズの極め
て少ない音声を得、かかる同士を照合させて認識率の低
下を防止するようにしたボイスコマンド式自動車電話機
を提供することを目的とする。
The present invention has been made in view of the above-mentioned points, and is a voice that removes background noise from received voices to obtain voices with extremely low noise, and compares such voices with each other to prevent a decrease in recognition rate. The purpose is to provide a command-type car phone.

(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によれば、コマンド音
声を入力し、登録されている音声と照合して一致したと
きに登録されている内容を表示するようにしたボイスコ
マンド式自動車電話機において、登録すべき音声又はコ
マンド音声の受付直前にバックグランドノイズを取り込
み、受け付けた登録すべき音声又はコマンド音声から前
記バックグランドノイズを除去するノイズ除去手段を設
けた構成としたものである。
(Means for Solving the Problems) In order to achieve the above object, according to the present invention, a command voice is inputted, and the registered voice is compared with a registered voice, and when a match is found, the registered contents are displayed. The voice command type car phone has a configuration in which a noise removing means is provided for capturing background noise immediately before accepting a voice to be registered or a command voice, and removing the background noise from the received voice to be registered or command voice. That is.

(作用) 登録すべき音声又はコマンド音声を受け付ける直前のバ
ックグランドノイズを取り込み、受け付けた登録音声又
はコマンド音声からバックグランドノイズを除去して本
来の音声を得る。そして、登録音声とコマンド音声との
照合時にノイズを含まない又はノイズが極めて少ない音
声同士を比較する。これにより本来の音声比較が可能と
なり、車両の走行時等における騒音下でも認識率の低下
が防止される。
(Operation) The background noise immediately before receiving the voice to be registered or the command voice is taken in, and the background noise is removed from the received registration voice or command voice to obtain the original voice. Then, when comparing the registered voice and the command voice, voices that do not contain noise or have very little noise are compared. This makes it possible to compare the original voices, and prevents the recognition rate from decreasing even under noisy conditions such as when a vehicle is running.

(実施例) 以下本発明の一実施例を添付図面に基づいて詳述する。(Example) An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

第1図は本発明を適用したボイスコマンド式自動車電話
機の音声入力部を示し、マイクロホン1は例えば、イン
ストルメントパネル(図示せず)の運転者の前方所定位
置に配置されており、運転者の音声を良好に入力するこ
とが可能とされている。このマイクロホン1の出力信号
は増幅器2で増幅された後、音声信号処理回路3及びノ
イズ信号処理回路4に入力される。音声を登録するため
の登録スイッチ5、コマンド音声を入力させるためのコ
マンドスイッチ6の各一方の切換接点5a。
FIG. 1 shows a voice input section of a voice command type car phone to which the present invention is applied, and a microphone 1 is placed, for example, at a predetermined position in front of the driver on an instrument panel (not shown). It is said that it is possible to input voice well. The output signal of this microphone 1 is amplified by an amplifier 2 and then input to an audio signal processing circuit 3 and a noise signal processing circuit 4. One switching contact 5a of each of the registration switch 5 for registering voice and the command switch 6 for inputting command voice.

6aは音声信号処理回路3に、各他方の切換接点5b、
6bはノイズ信号処理回路4に接続され、各コモン接点
5C16Cは接地されている。
6a is the audio signal processing circuit 3, each other switching contact 5b,
6b is connected to the noise signal processing circuit 4, and each common contact 5C16C is grounded.

音声信号処理回路3は、登録スイッチ5又はコマンドス
イッチ6が接点5a又は6aに切り替えられると増幅器
2から出力された信号を受け付け、音声信号evを出力
する。この音声信号には、本来の音声信号と外部ノイズ
信号とが含まれている。
The audio signal processing circuit 3 receives the signal output from the amplifier 2 when the registration switch 5 or the command switch 6 is switched to the contact 5a or 6a, and outputs the audio signal ev. This audio signal includes an original audio signal and an external noise signal.

ノイズ信号処理回路4は、登録スイッチ5又はコマンド
スイッチ6が接点5b又は6bに切り替えられると増幅
器2から出力された信号を受け付け、ノイズ信号e8を
出力する。このノイズ信号は外部ノイズのみの信号であ
る。
The noise signal processing circuit 4 receives the signal output from the amplifier 2 when the registration switch 5 or the command switch 6 is switched to the contact point 5b or 6b, and outputs a noise signal e8. This noise signal is a signal of only external noise.

減算回路7は、音声信号処理回路3とノイズ信号処理回
路4の各出力信号eVseHを入力し、信号eVから信
号e、Iを減算(e、−eN)して音声信号eのみを出
力する。音声認識コンピュータ8は音声信号eを受け付
け、音声登録スイッチ5が接点5aに切換られている時
には当該音声を登録し、コマンドスイッチ6が接点6a
に切換られている時にはコマンド音声を登録されている
音声と照合し、一致している場合には表示部(図示せず
)に当該コマンド音声に応じて登録されている内容を表
示する。
The subtraction circuit 7 inputs each output signal eVseH of the audio signal processing circuit 3 and the noise signal processing circuit 4, subtracts the signals e and I from the signal eV (e, -eN), and outputs only the audio signal e. The voice recognition computer 8 receives the voice signal e, and when the voice registration switch 5 is switched to the contact 5a, registers the voice, and the command switch 6 is switched to the contact 6a.
When the command voice is switched to , the command voice is compared with the registered voice, and if they match, the registered contents are displayed on a display section (not shown) in accordance with the command voice.

以下に第2図に示すフローチャート及び第3図に示す音
声信号及びノイズ信号のスペクトル分布を参照しつつ作
用を説明する。
The operation will be explained below with reference to the flowchart shown in FIG. 2 and the spectral distribution of the audio signal and noise signal shown in FIG.

音声認識コンピュータ8に相手方の氏名を登録する場合
には、発声する直前に登録スイッチ5を接点5bに切り
替え(ステップ1)る。ノイズ信号処理回路4は、マイ
クロホンlがら入力され増幅器2で増幅された車両の走
行時の騒音等の外部ノイズを受け付け(ステップ2)で
サンプリングし、ノイズ信号es  (第3図(a))
を出力する。この外部ノイズは登録すべき音声を発声す
る発声直前におけるバックグランドノイズである。この
間音声信号処理回路3の音声信号の受け付けが禁止され
る。
When registering the other party's name in the voice recognition computer 8, the registration switch 5 is switched to the contact 5b immediately before speaking (step 1). The noise signal processing circuit 4 receives external noise such as vehicle running noise inputted from the microphone 1 and amplified by the amplifier 2 (step 2), samples it, and generates a noise signal es (FIG. 3(a)).
Output. This external noise is background noise immediately before the voice to be registered is uttered. During this time, the audio signal processing circuit 3 is prohibited from receiving audio signals.

次に、登録スイッチ5を接点5aに切り替え、運転者が
マイクロホンlに向かって登録すべき相手の氏名を発声
する。音声信号処理回路3は、マイクロホン1から出力
され増幅器2で増幅された音声信号を受け付け(ステッ
プ3)、対応する音声信号ev  (第3図(b))を
出力する。この音声信号eVには本来の音声の他に前記
走行時の騒音等のバンクグランドノイズが含まれている
。減算回路7は入力せる音声信号eVからノイズ信号e
i+を減算<ev  eN) して(ステップ4)ノイ
ズ成分を除去し、本来の音声信号e(第3図(C))の
みを出力する。音声認識コンピュータ8は、この音声信
号e即ち、本来の音声のみを情報として登録(ステップ
5)する、このような操作を繰り返して行ない、音声認
識コンピュータ8に必要な相手の氏名を順次登録する。
Next, the registration switch 5 is switched to the contact 5a, and the driver speaks into the microphone l the name of the person to be registered. The audio signal processing circuit 3 receives the audio signal output from the microphone 1 and amplified by the amplifier 2 (step 3), and outputs the corresponding audio signal ev (FIG. 3(b)). This audio signal eV includes bank ground noise such as the noise generated during driving, in addition to the original audio. The subtraction circuit 7 subtracts the noise signal e from the input audio signal eV.
The noise component is removed by subtracting i+<ev eN (step 4), and only the original audio signal e (FIG. 3(C)) is output. The voice recognition computer 8 registers only the voice signal e, that is, the original voice, as information (step 5).The voice recognition computer 8 repeatedly performs such an operation to register only the necessary names of the other parties in the voice recognition computer 8.

運転者が走行中に電話をかける場合には、先ずコマンド
スイッチ6を接点6bに切り替え(ステップ6)る。ノ
イズ信号処理回路4は、マイクロホンlから入力され増
幅器2で増幅された外部ノイズを受け付け(ステップ7
)、サンプリングしてノイズ信号es’(第3図(d)
)を出力する。この外部ノイズはコマンド音声を発声す
る直前のバックグランドノイズであり、当該車両の走行
時の騒音等が含まれている。この間音声信号処理回路3
の音声信号の受け付けが禁止される。
When the driver makes a phone call while driving, he first switches the command switch 6 to the contact 6b (step 6). The noise signal processing circuit 4 receives external noise input from the microphone l and amplified by the amplifier 2 (step 7).
), sample the noise signal es' (Fig. 3(d)
) is output. This external noise is the background noise immediately before the command voice is uttered, and includes noise when the vehicle is running. During this time, the audio signal processing circuit 3
reception of audio signals is prohibited.

次に、コマンドスイッチ6を接点6aに切り替え、運転
者がマイクロホン1に向かって登録すべき相手の氏名を
発声する。音声信号処理回路3はマイクロホン1から出
力され増幅器2で増幅されたコマンド音声信号を受け付
け(ステップ8)、対応する音声信号e、゛ (第3図
(e))を出力する。
Next, the command switch 6 is switched to the contact 6a, and the driver speaks into the microphone 1 the name of the person to be registered. The audio signal processing circuit 3 receives the command audio signal output from the microphone 1 and amplified by the amplifier 2 (step 8), and outputs the corresponding audio signal e, ゛ (FIG. 3(e)).

この音声信号ew゛には本来のコマンド音声信号の他に
当該車両の走行時の騒音等のバックグランドノイズ信号
が含まれている。減算回路7は入力せる音声信号ev+
からノイズ信号 、+を減算(ev’−e、°)して(
ステップ9)、本来の音声信号e’  (第3図(f)
)のみを出力する。
This audio signal EW includes, in addition to the original command audio signal, a background noise signal such as noise generated when the vehicle is running. The subtraction circuit 7 inputs the audio signal ev+
Subtract the noise signal , + (ev'-e, °) from (
Step 9), the original audio signal e' (Fig. 3(f)
) only.

音声認識コンビエータ8は、コマンド音声信号e°を入
力して、登録されている音声の中から当該コマンド音声
と一致するものを捜し出し、この捜し出した登録音声と
当該コマンド音声とを照合しくステップ10)、両者が
一致しているか否かを判別(ステップ11)する。この
照合時におけるコマンド音声はノイズ成分が殆ど除去さ
れた本来の音声であり、従って、コンピュータ8はノイ
ズ成分を含まない本来の音声同士を比較をすることがで
きる。
The voice recognition combiator 8 inputs the command voice signal e°, searches for a voice that matches the command voice from among the registered voices, and collates the searched registered voice with the command voice (step 10). , it is determined whether the two match (step 11). The command voice used during this comparison is the original voice from which most of the noise components have been removed, and therefore the computer 8 can compare the original voices that do not contain noise components.

コンピュータ8は、ステップ11の判別答が肯定(YE
S)の場合には前記表示部に相手方の電話番号等の登録
内容を表示(ステップ12)して運転者に確認させ、否
定(No)の場合には前記表示部に例えば、“もう−度
いって下さい”と表示(ステップ13)して運転者にコ
マンド音声を要求してステップ6に戻る。これにより、
車両の走行時の騒音等の外部ノイズに起因する音声認識
率の低下が防止される。
The computer 8 determines that the discrimination answer in step 11 is affirmative (YE
In the case of S), the registration details such as the telephone number of the other party are displayed on the display section (step 12) for the driver to confirm, and in the case of negative (No), the display section displays, for example, ""Pleasego" is displayed (step 13), the driver is requested to give a command voice, and the process returns to step 6. This results in
This prevents the voice recognition rate from decreasing due to external noise such as noise when the vehicle is running.

(発明の効果) 以上説明したように本発明によれば、コマンド音声を入
力し、登録されている音声と照合して一致したときに登
録されている内容を表示するようにしたボイスコマンド
式自動車電話機において、登録すべき音声又はコマンド
音声の受付直前にバックグランドノイズを取り込み、受
け付けた登録すべき音声又はコマンド音声からバックグ
ランドノイズを除去するノイズ除去手段を設けたことに
より、車両の走行時等の騒音下でも音声認識率の低下が
防止され、ボイスコマンド式の自動車電話機をより使い
易くすることが可能となるという効果がある。
(Effects of the Invention) As explained above, according to the present invention, a voice command type automobile is configured such that a command voice is inputted, and the registered voice is checked against the registered voice, and when a match is found, the registered contents are displayed. By installing a noise removal means on the telephone that captures background noise immediately before accepting the voice to be registered or command voice and removes the background noise from the received voice to be registered or command voice, it is possible to reduce the noise when the vehicle is running, etc. This has the effect that the voice recognition rate is prevented from deteriorating even under noisy conditions, making it possible to make the voice command type car phone easier to use.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係るボイスコマンド式自動車電話機の
音声入力部の一実施例を示すブロック図、第2図は第1
図の音声入力部の作用を示すフローチャート、第3図は
第1図の各部の信号波形の一実施例を示すスペクトル分
布図である。 ■・・・マイクロホン、2・・・増幅器、3・・・音声
信号処理回路、4・・・ノイズ信号処理回路、5・・・
登録ス イッチ、6・・・コマンドスイッチ、7・・減算回路、 8・・・音声認識コンピュータ。
FIG. 1 is a block diagram showing an embodiment of the voice input section of a voice command type car telephone according to the present invention, and FIG.
FIG. 3 is a spectral distribution diagram showing an example of signal waveforms at each part in FIG. 1. ■...Microphone, 2...Amplifier, 3...Audio signal processing circuit, 4...Noise signal processing circuit, 5...
Registration switch, 6... Command switch, 7... Subtraction circuit, 8... Voice recognition computer.

Claims (1)

【特許請求の範囲】[Claims] コマンド音声を入力し、登録されている音声と照合して
一致したときに登録されている内容を表示するようにし
たボイスコマンド式自動車電話機において、登録すべき
音声又はコマンド音声の受付直前にバックグランドノイ
ズを取り込み、受け付けた登録すべき音声又はコマンド
音声から前記バックグランドノイズを除去するノイズ除
去手段を設けたことを特徴とするボイスコマンド式自動
車電話機。
In a voice command type car phone that inputs a command voice, checks it with the registered voice, and displays the registered content when there is a match, background 1. A voice command type car telephone, characterized in that it is provided with a noise removing means for taking in noise and removing the background noise from the received voice to be registered or command voice.
JP1137829A 1989-05-31 1989-05-31 Voice command type automobile telephone set Pending JPH033540A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1137829A JPH033540A (en) 1989-05-31 1989-05-31 Voice command type automobile telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1137829A JPH033540A (en) 1989-05-31 1989-05-31 Voice command type automobile telephone set

Publications (1)

Publication Number Publication Date
JPH033540A true JPH033540A (en) 1991-01-09

Family

ID=15207816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1137829A Pending JPH033540A (en) 1989-05-31 1989-05-31 Voice command type automobile telephone set

Country Status (1)

Country Link
JP (1) JPH033540A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05316598A (en) * 1992-05-08 1993-11-26 Kinki Nippon Tetsudo Kk Controller for broadcast sound volume in public space
FR2761848A1 (en) * 1997-04-04 1998-10-09 Parrot Sa RADIOTELEPHONE VOICE COMMAND DEVICE, ESPECIALLY FOR USE IN A MOTOR VEHICLE
FR2794322A1 (en) * 1999-05-27 2000-12-01 Sagem Mobile telephone local noise suppression method, using voice-processing algorithm, determining suppression parameters before any voice signals are exchanged between called and calling parties
FR2794323A1 (en) * 1999-05-27 2000-12-01 Sagem Mobile telephone local noise suppression method, using voice-processing algorithm, determining suppression parameters before any voice signals are exchanged between called and calling parties
CN108711434A (en) * 2018-04-04 2018-10-26 北京小米移动软件有限公司 Vehicle noise-reduction method and device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57212496A (en) * 1981-06-24 1982-12-27 Kyosan Electric Mfg Noise processing system for voice recognition unit
JPH01123556A (en) * 1987-11-06 1989-05-16 Ricoh Co Ltd Voice dialing device
JPH02253755A (en) * 1989-03-28 1990-10-12 Toshiba Corp Sound dial registering/recognizing system for radio telephone equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57212496A (en) * 1981-06-24 1982-12-27 Kyosan Electric Mfg Noise processing system for voice recognition unit
JPH01123556A (en) * 1987-11-06 1989-05-16 Ricoh Co Ltd Voice dialing device
JPH02253755A (en) * 1989-03-28 1990-10-12 Toshiba Corp Sound dial registering/recognizing system for radio telephone equipment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05316598A (en) * 1992-05-08 1993-11-26 Kinki Nippon Tetsudo Kk Controller for broadcast sound volume in public space
FR2761848A1 (en) * 1997-04-04 1998-10-09 Parrot Sa RADIOTELEPHONE VOICE COMMAND DEVICE, ESPECIALLY FOR USE IN A MOTOR VEHICLE
WO1998045997A1 (en) * 1997-04-04 1998-10-15 Parrot, Societe Anonyme Radiotelephone voice control device, in particular for use in a motor vehicle
FR2794322A1 (en) * 1999-05-27 2000-12-01 Sagem Mobile telephone local noise suppression method, using voice-processing algorithm, determining suppression parameters before any voice signals are exchanged between called and calling parties
FR2794323A1 (en) * 1999-05-27 2000-12-01 Sagem Mobile telephone local noise suppression method, using voice-processing algorithm, determining suppression parameters before any voice signals are exchanged between called and calling parties
GB2352377B (en) * 1999-05-27 2004-06-23 Sagem Noise suppression method
CN108711434A (en) * 2018-04-04 2018-10-26 北京小米移动软件有限公司 Vehicle noise-reduction method and device

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