JP2973201B2 - Voiceprint verification method - Google Patents
Voiceprint verification methodInfo
- Publication number
- JP2973201B2 JP2973201B2 JP1099058A JP9905889A JP2973201B2 JP 2973201 B2 JP2973201 B2 JP 2973201B2 JP 1099058 A JP1099058 A JP 1099058A JP 9905889 A JP9905889 A JP 9905889A JP 2973201 B2 JP2973201 B2 JP 2973201B2
- Authority
- JP
- Japan
- Prior art keywords
- sound pattern
- measured
- registered
- pattern
- converted
- 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.)
- Expired - Fee Related
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は車両等のエンジン又はその他の発音体から発
生する音の音紋を測定し、該測定音紋から或いは予め登
録してある登録音紋と比較照合することにより、発音体
の種別を推定する装置における音紋の照合方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention measures a sound pattern of a sound generated from an engine or other sounding body of a vehicle or the like, and uses the measured sound pattern or a registered sound registered in advance. The present invention relates to a method of matching a sound pattern in a device for estimating the type of a sounding body by performing comparison and matching with a pattern.
従来、この種の音紋の照合方法としては、デザインデ
バイダ、所謂テンポイントデバイダを用いるか、又は本
出願人が先に出願した特願昭61−124195号、特願昭61−
177429号及び特願昭63−70450号に開示されたものがあ
った。Conventionally, as a method of collating such a sound pattern, a design divider, a so-called ten-point divider, has been used, or Japanese Patent Application Nos. 61-124195 and 61-124195 filed earlier by the present applicant.
177429 and Japanese Patent Application No. 63-70450.
デザインデバイダを用いる方法は、測定された音紋表
示（以下「測定音紋」という）と、予め登録されている
音紋の記録（以下「登録音紋」という）とを突き合わ
せ、デザインデバイダで相互のパターンピッチを計り、
比較照合することにより発音体の種別を推定する方法で
ある。A method using a design divider is to match a measured sound pattern display (hereinafter referred to as “measured sound pattern”) with a previously registered sound pattern record (hereinafter referred to as “registered sound pattern”), Measure the pattern pitch of
This is a method of estimating the type of the sounding body by comparing and collating.
また、特願昭61−124195号に開示されたものは、同一
画面上に測定音紋と登録音紋とを同時に表示させること
により比較照合する方法である。Further, the method disclosed in Japanese Patent Application No. 61-124195 is a method of comparing and collating by simultaneously displaying a measured sound pattern and a registered sound pattern on the same screen.
また、特願昭61−177429号に開示されたものは、表示
器に測定音紋を表示させ、エンジン構造によりそこから
発生される音に特有の音紋が存在することから、測定音
紋と登録音紋とを比較照合し、相似の登録音紋からエン
ジン構造を容易に推定する方法である。Further, the one disclosed in Japanese Patent Application No. 61-177429 displays a measured sound pattern on a display, and a sound pattern peculiar to the sound generated from the engine structure exists. In this method, the engine structure is easily estimated from a similar registered sound pattern by comparing and matching the registered sound pattern.
更に、特願昭63−70450号に開示されたものは、透過
形表示器に表示した登録音紋を測定音紋に重ね合わせる
ことにより比較照合する方法である。Furthermore, the method disclosed in Japanese Patent Application No. 63-70450 is a method of comparing and collating by superimposing a registered sound pattern displayed on a transmissive display with a measured sound pattern.
しかしながら上記従来のいずれの方法においても、測
定音紋のパターンピッチが時々刻々と変化しているた
め、該測定音紋を登録音紋と比較照合する場合、測定音
紋の内の時刻を特定し、その時刻における測定音紋のパ
ターンと登録音紋のパターンを比較照合する必要があ
り、比較照合にある程度の熟練が要求されるという問題
があった。However, in any of the above-mentioned conventional methods, since the pattern pitch of the measured sound pattern changes every moment, when comparing the measured sound pattern with the registered sound pattern, the time in the measured sound pattern is specified. However, it is necessary to compare and match the pattern of the measured sound pattern and the pattern of the registered sound pattern at that time, and there has been a problem that some skill is required for the comparison and matching.
また、登録音紋数が多い場合、測定音の解析に長時間
を要するという問題もあった。Further, when the number of registered sound patterns is large, there is a problem that it takes a long time to analyze the measured sound.
本発明は上述の点に鑑みてなされたもので、上記問題
点を除去し、測定音紋と登録音紋の比較照合に熟練を要
せず、登録音紋と比較照合が極めて容易な音紋の照合方
法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and eliminates the above-described problems, does not require any skill in comparing and comparing a measured sound pattern and a registered sound pattern, and makes it extremely easy to compare and compare with a registered sound pattern. The object of the present invention is to provide a matching method.
上記課題を解決するため本発明は、車両等のエンジン
或いはその他の各種発音体から発生する音の音紋を測定
し、該測定音紋と予め登録されている登録音紋とを比較
照合することにより発音体の種別を推定する音紋の照合
方法において、測定音紋は各時刻において基本周波数の
整数倍の高調波関係にあることに着目し、測定音紋を高
調波次数対時間特性に変換処理して、該変換処理したも
のから該測定音紋の持つ特徴パターンを変換測定音紋と
して抽出し、該変換測定音紋と高調波次数対時間特性と
して予め登録している登録音紋とを比較照合することを
特徴とする。In order to solve the above-mentioned problem, the present invention measures a sound pattern of a sound generated from an engine of a vehicle or the like or other various sound generators, and compares and compares the measured sound pattern with a registered sound pattern registered in advance. In the method of collating a sound pattern that estimates the type of the sounding body, the measured sound pattern is converted into a harmonic order versus time characteristic, focusing on the fact that the measured sound pattern has a harmonic relationship of an integral multiple of the fundamental frequency at each time. Processing, the characteristic pattern of the measured sound pattern is extracted from the converted signal as a converted measured sound pattern, and the converted measured sound pattern and a registered sound pattern registered in advance as harmonic order versus time characteristics are extracted. It is characterized by comparison and collation.
上記の如く測定音紋を高調波次数対時間特性に変換処
理して、該変換処理したものから該測定音紋の持つ特徴
パターンを変換測定音紋として抽出し、該変換測定音紋
と登録音紋とを比較照合するので、測定音紋は時間に対
して変動するが、変換された高調波次数は時間的に関係
なく、常に一定しているから、比較照合が極めて容易と
なる。As described above, the measured sound pattern is converted into a harmonic order versus time characteristic, and the characteristic pattern of the measured sound pattern is extracted as a converted measured sound pattern from the converted sound pattern. Since the pattern is compared with the pattern, the measured sound pattern fluctuates with time. However, the converted harmonic order is always constant irrespective of time, so that the comparison and comparison is extremely easy.
以下、本発明の実施例を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明に係る音紋の照合方法を適用する音紋
の照合システムの構成を示すブロック図である。同図に
おいて、車両等１に搭載されているエンジン又はその他
の発音体（以下、「発音体」という）２の発生音（以
下、発音体の発生音」という）３は、媒体４を介してマ
イクロホン５に受けられる。なお、ここで媒体４は気
体、液体、固体等のいずれかを問わない。FIG. 1 is a block diagram showing the configuration of a voiceprint collation system to which the voiceprint collation method according to the present invention is applied. In FIG. 1, an engine or another sounding body (hereinafter, referred to as “sounding body”) 2 mounted on a vehicle 1 or the like 1 (hereinafter, referred to as a sounding body generating sound) 3 is transmitted via a medium 4. It is received by the microphone 5. Here, the medium 4 may be any of gas, liquid, solid, and the like.
発音体の発生音３は、マイクロホン５で電気信号６に
変換され、増幅回路７で所要レベルまで増幅され、周波
数分析回路８で周波数分析され、第２図に示すように周
波数対時間特性の測定音紋９を得る。なお、第２図にお
いて、縦軸は時間ｔを表わし、横軸は周波数ｆを表わ
す。The sound 3 generated by the sounding body is converted into an electric signal 6 by a microphone 5, amplified to a required level by an amplifier circuit 7, subjected to frequency analysis by a frequency analysis circuit 8, and measured for frequency-time characteristics as shown in FIG. The sound pattern 9 is obtained. In FIG. 2, the vertical axis represents time t, and the horizontal axis represents frequency f.
測定音紋９は時間的に見た場合、第２図に示すように
周波数成分は変動しているが、各時刻においては、その
時刻における基本周波数の整数倍の高調波関係にあり、
この高調波関係は時間に関係なく常に一定している。こ
のことに着目し、変換回路10で、測定音紋９を高調波次
数対時間特性に変換することにより、第３図に例示する
ような、変換測定音紋11を得、これを表示器12に表示さ
せる。なお、第３図において、縦軸は時間ｔを表わし、
横軸は高調波次数ｆ′を表わす。The frequency components of the measured sound pattern 9 fluctuate as shown in FIG. 2 when viewed in time, but at each time, there is a harmonic relationship of an integral multiple of the fundamental frequency at that time.
This harmonic relation is always constant regardless of time. Focusing on this, the conversion circuit 10 converts the measured sound pattern 9 into a harmonic order versus time characteristic, thereby obtaining a converted measured sound pattern 11 as illustrated in FIG. To be displayed. In FIG. 3, the vertical axis represents time t,
The horizontal axis represents the harmonic order f '.
なお、表示器12としては、ブラウン管、フラットパネ
ルディスプレイ又は記録器等その機種は問わない。The display 12 may be of any type, such as a cathode ray tube, a flat panel display, or a recorder.
また、ファイル13には予め第４図に例示するような登
録音紋14が登録されており、登録音紋14は各種の発音体
について作成されたものである。なお、第４図におい
て、縦軸は時間ｔを表わし、横軸は高調波次数ｆ′を表
わす。A registered voiceprint 14 as illustrated in FIG. 4 is registered in the file 13 in advance, and the registered voiceprint 14 is created for various sounding bodies. In FIG. 4, the vertical axis represents time t, and the horizontal axis represents harmonic order f '.
表示器12に表示された変換測定音紋11と相似している
登録音紋14を表示器15に表示させる。16は変換測定音紋
11と比較照合するために表示された登録音紋である。A registered voiceprint 14 similar to the converted measurement voiceprint 11 displayed on the display 12 is displayed on the display 15. 16 is the conversion measurement tone
This is a registered voiceprint displayed for comparison and comparison with 11.
表示器12がブラウン管、フラットディスプレイ等の場
合は、表示器15を表示器12と共用し、同一画面上に変換
測定音紋11と登録音紋16を表示させることも可能であ
る。When the display 12 is a cathode ray tube, a flat display, or the like, the display 15 can be shared with the display 12, and the converted measurement sound pattern 11 and the registered sound pattern 16 can be displayed on the same screen.
ここで、変換測定音紋11と登録音紋16とは、表示形式
が同じ、即ち高調波次数対時間特性で表示されているた
め、比較照合が極めて容易であり、比較照合作業に高度
の熟練度を要求しない。二つの発音体の発生音３が略同
時にマイクロホン５に受けられた場合は、周波数分析回
路８で分析された測定音紋は第５図に示すように、二組
みの測定音紋9a及び測定音紋9bが表示され、重畳された
部分の表示は判定し難くなる。しかしながら、本発明で
は測定音紋9a及び測定音紋9bの内、一組の測定音紋9aの
基本周波数に着目し、変換回路10で高調波次数対時間特
性に変換することにより、第６図（ａ）に示すような、
二組の変換測定音紋11a及び変換測定音紋11bが得られ
る。この変換測定音紋11bが単独で整数倍関係にあれ
ば、不要雑音等による疑似変換測定音紋でなく、変換測
定音紋11aに対応する発音体2aとは別の発音体2bがある
ことが分かる。また、測定音紋9aの基本周波数に着目し
て変換処理し、基本周波数の整数倍又はその近接周波数
以外の周波数成分を抑圧又は除去すれば、第６図（ｂ）
に例示すめように、着目した変換測定音紋11aだけが得
られる。Here, the converted measurement sound pattern 11 and the registered sound pattern 16 are displayed in the same display format, that is, are displayed with the harmonic order versus time characteristic, so that comparison and comparison are extremely easy, and highly skilled in comparison and comparison work. Do not demand a degree. When the generated sounds 3 of the two sounding bodies are received by the microphone 5 substantially simultaneously, the measured sound pattern analyzed by the frequency analysis circuit 8 is composed of two sets of the measured sound pattern 9a and the measured sound pattern 9a as shown in FIG. The crest 9b is displayed, and it is difficult to determine the display of the superimposed portion. However, in the present invention, focusing on the fundamental frequency of one set of the measured sound pattern 9a of the measured sound pattern 9a and the measured sound pattern 9b, the conversion circuit 10 converts the fundamental frequency into a harmonic order versus time characteristic. As shown in (a),
Two sets of converted measurement sound patterns 11a and 11b are obtained. If the converted measurement sound pattern 11b alone is in an integer multiple relationship, there may be a sounding element 2b different from the sound element 2a corresponding to the conversion measurement sound pattern 11a, not a pseudo conversion measurement sound pattern due to unnecessary noise or the like. I understand. Further, if the conversion processing is performed while focusing on the fundamental frequency of the measured sound pattern 9a, and frequency components other than an integral multiple of the fundamental frequency or its close frequency are suppressed or eliminated, FIG.
As shown in the example, only the conversion measurement sound pattern 11a of interest is obtained.
なお、複数の発音体2a及び発音体2bの変換測定音紋11
a及び変換測定音紋11bの両者を表示させるか、又はいず
れか一つだけを表示させるかは、変換測定音紋11を利用
する処理に係わることであり、本発明においては限定し
ない。Note that the conversion measurement sound pattern 11 of the plurality of sounding bodies 2a and the sounding bodies 2b
Whether to display both a and the converted measurement sound pattern 11b or only one of them is related to the processing using the converted measurement sound pattern 11 and is not limited in the present invention.
以上説明したように本発明によれば、測定音紋を高調
波次数対時間特性に変換処理し時間的に変動しない変換
測定音紋として抽出し、該変換測定音紋と同じく変換処
理して時間的に変動しない音紋として抽出した登録音紋
とを比較照合するため、下記のような優れた効果が得ら
れるものである。As described above, according to the present invention, the measured sound pattern is converted into a harmonic order versus time characteristic, extracted as a converted measured sound pattern that does not fluctuate with time, and converted in the same manner as the converted measured sound pattern. Since the comparison is made with the registered fingerprint which is extracted as the fingerprint which does not fluctuate, the following excellent effects can be obtained.
（１）比較照合が極めて容易になり、特に比較照合に熟
練を必要としないため判定作業能率を向上させることが
できる。(1) The comparison / collation becomes extremely easy, and in particular, since skill is not required for the comparison / collation, the efficiency of the determination operation can be improved.
（２）また、測定音紋だけでは判定しにくい複数の発音
体の種別を推定することも容易となる。(2) It is also easy to estimate the types of a plurality of sounding bodies that are difficult to determine using only the measured sound pattern.
第１図は本発明に係る音紋の照合方法を適用する音紋の
照合システムの構成を示すブロック図、第２図は測定音
紋例を示す図、第３図は変換測定音紋例を示す図、第４
図は登録音紋例を示す図、第５図は周波数成分を異にす
る二つの発音体からの発生音を同時に受けたときの測定
音紋例を示す図、第６図（ａ）はこのときの変換測定音
紋例を示す図、第６図（ｂ）は二つの発生音の内の一つ
の発生音の基本周波数に着目しこの高調波又はその近接
周波数以外の周波数成分を抑圧した変換測定音紋例を示
す図である。 図中、１……車両等、２……発音体、５……マイクロホ
ン、７……増幅回路、８……周波数分析回路、10……変
換回路、12……表示器、13……ファイル、14……登録音
紋、15……表示器。FIG. 1 is a block diagram showing the configuration of a voiceprint collation system to which the voiceprint collation method according to the present invention is applied, FIG. 2 is a diagram showing an example of a measured voiceprint, and FIG. Figure 4
FIG. 5 shows an example of a registered sound pattern, FIG. 5 shows an example of a measured sound pattern when sounds generated from two sounding bodies having different frequency components are simultaneously received, and FIG. FIG. 6 (b) is a diagram showing an example of a converted measured sound pattern at the time. FIG. 6 (b) focuses on the fundamental frequency of one of the two generated sounds and suppresses frequency components other than the harmonics or their close frequencies. It is a figure showing an example of a measurement sound pattern. In the figure, 1 ... vehicle etc., 2 ... sound generator, 5 ... microphone, 7 ... amplifier circuit, 8 ... frequency analysis circuit, 10 ... conversion circuit, 12 ... display, 13 ... file, 14… Registered fingerprint, 15… Display.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−275997（ＪＰ，Ａ) 特開 平１−282483（ＪＰ，Ａ) 特開 昭63−32700（ＪＰ，Ａ) 特開 昭62−279493（ＪＰ，Ａ) 特開 平１−243100（ＪＰ，Ａ) 実開 昭63−75835（ＪＰ，Ｕ) 実開 平１−142889（ＪＰ，Ｕ) 特許2843991（ＪＰ，Ｂ２) 特許2587920（ＪＰ，Ｂ２) 実公 昭60−20058（ＪＰ，Ｙ２) 実公 平６−4309（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.6，ＤＢ名) G01H 3/00 G01H 3/08 G10L 3/00 531 G10L 3/02 301 G10L 7/08 ＪＩＣＳＴ科学技術文献ファイル──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-275997 (JP, A) JP-A-1-282483 (JP, A) JP-A-63-32700 (JP, A) JP-A-62-1987 279493 (JP, A) JP-A-1-243100 (JP, A) JP-A-63-75835 (JP, U) JP-A-1-142889 (JP, U) JP2843991 (JP, B2) JP2587920 (JP , B2) Jigyo Sho 60-20058 (JP, Y2) Jigyo 6-4309 (JP, Y2) (58) Fields studied (Int. Cl. 6 , DB name) G01H 3/00 G01H 3/08 G10L 3/00 531 G10L 3/02 301 G10L 7/08 JICST Science and Technology Reference File
Claims (1)
て測定し、該測定した電気信号を周波数分析して周波数
対時間の測定音紋を得、該測定音紋と予め登録してある
登録音紋とを比較照合することにより、発音体の種別を
推定する音紋照合方法において、 前記測定音紋を高調波次数対時間特性に変換処理し時間
的に変動しない変換測定音紋として抽出し、該変換測定
音紋と同じく変換処理して時間的に変動しない音紋とし
て抽出した登録音紋とを比較照合することを特徴とする
音紋照合方法。1. A sound generated from various sounding bodies is measured as an electric signal, and the measured electric signal is subjected to frequency analysis to obtain a frequency-to-time measurement sound pattern, which is registered in advance as the measurement sound pattern. In a sound pattern matching method for estimating the type of a sounding body by comparing and matching with a sound pattern, the measured sound pattern is converted into a harmonic order versus time characteristic and extracted as a converted measured sound pattern that does not fluctuate over time. A voiceprint matching method characterized by comparing and matching a registered voiceprint extracted as a voiceprint which does not fluctuate with time by performing a conversion process similarly to the conversion measurement voiceprint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1099058A JP2973201B2 (en) | 1989-04-18 | 1989-04-18 | Voiceprint verification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1099058A JP2973201B2 (en) | 1989-04-18 | 1989-04-18 | Voiceprint verification method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02275999A JPH02275999A (en) | 1990-11-09 |
| JP2973201B2 true JP2973201B2 (en) | 1999-11-08 |
Family
ID=14237097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1099058A Expired - Fee Related JP2973201B2 (en) | 1989-04-18 | 1989-04-18 | Voiceprint verification method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2973201B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000072308A1 (en) * | 1999-05-21 | 2000-11-30 | Matsushita Electric Industrial Co., Ltd. | Interval normalization device for voice recognition input voice |
| JP3453130B2 (en) * | 2001-08-28 | 2003-10-06 | 日本電信電話株式会社 | Apparatus and method for determining noise source |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2587920B2 (en) | 1986-05-28 | 1997-03-05 | 沖電気工業 株式会社 | Vehicle type identification method |
| JP2843991B2 (en) | 1989-04-18 | 1999-01-06 | 沖電気工業株式会社 | How to convert voiceprint patterns |
-
1989
- 1989-04-18 JP JP1099058A patent/JP2973201B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2587920B2 (en) | 1986-05-28 | 1997-03-05 | 沖電気工業 株式会社 | Vehicle type identification method |
| JP2843991B2 (en) | 1989-04-18 | 1999-01-06 | 沖電気工業株式会社 | How to convert voiceprint patterns |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02275999A (en) | 1990-11-09 |
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