EP1062487B1 - Mikrophonanordnung für die spracherkennung unter variablen räumlichen bedingungen - Google Patents
Mikrophonanordnung für die spracherkennung unter variablen räumlichen bedingungen Download PDFInfo
- Publication number
- EP1062487B1 EP1062487B1 EP99914401A EP99914401A EP1062487B1 EP 1062487 B1 EP1062487 B1 EP 1062487B1 EP 99914401 A EP99914401 A EP 99914401A EP 99914401 A EP99914401 A EP 99914401A EP 1062487 B1 EP1062487 B1 EP 1062487B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microphone
- speech
- correction unit
- transmission channel
- speaker
- 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 - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 238000012937 correction Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000012549 training Methods 0.000 claims description 8
- 230000003044 adaptive effect Effects 0.000 claims description 5
- 230000005236 sound signal Effects 0.000 claims description 3
- 238000010183 spectrum analysis Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 8
- 238000012546 transfer Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000001419 dependent effect Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K15/00—Acoustics not otherwise provided for
- G10K15/08—Arrangements for producing a reverberation or echo sound
Definitions
- the invention relates to a device for speech recognition, where the language can be selected using a near-speaker Microphones converted into electrical signals and over one first transmission channel a detection system or by means of of a microphone far from the speaker converted into electrical signals and the detection system via a second transmission channel is fed, and in which the detection system speech elements recorded by the respective microphone with language elements previously learned in a training phase compares and generates a recognition signal if they match.
- the invention further relates to a method for recognition of language.
- recognizing speech for example over a phone, however, is such an assumption not practical, because today's telephone systems have the possibility switching between a telephone close to the speaker, where the microphone of the handset is near the mouth of the Speaker is held, and a microphone remote from the speaker, in which in a hands-free state the microphone voices in takes up a greater distance.
- the typical distance for a microphone close to the speaker is in the range of 0 to 30 cm, i.e. it is mainly the direct sound in electrical signals changed. With the microphone far from the speaker, the distance is larger and mix sound elements due to echo effects, Wall reflections and direct sound. If now during used the microphone close to the speaker during the training phase and in the microphone away from the speaker is used later, the detection rate already drops due to the different Space transfer functions due to the different Transmission links.
- Correction unit switched so the electrical signal modified that it contains space transfer properties. It becomes the language, which is via a microphone close to the speaker is entered, modified in the electrical signal so that it has the properties, like the language, which is beyond the speaker Microphone has been entered.
- the correction unit are the room acoustic influences for one replicated relatively large voice transmission link. For example are reflected by the correction unit replicated on nearby objects and or reverberation in rooms.
- Figure 1 shows a device for speech recognition in which the speech is entered by a person 10 using a telephone becomes.
- first transmission channel 12 Speech through a microphone 14 near the speaker, for example with the handset.
- the language is through the microphone 14 converted into an electrical signal and pre-amplified by an amplifier 16.
- a correction unit 15 changes the electrical signal so that it has transmission properties of a room with a transmission link larger than the close range.
- this forms Correction unit 15 the reverberation in rooms and / or the Shell reflections on nearby objects within the voice transmission path to.
- sound reflections can, for example from a table top, from a screen or come from other objects.
- the reverberation in rooms stems from reflections on relatively distant objects, such as from the walls of the room.
- the electrical signal changed by the correction unit 15 passes through a compensation filter 18, which is used for compensation varying microphone and amplifier frequency response is used.
- the electrical signal is then sent to a data processing system 17 fed, which the further digital processing for speech recognition.
- the input of speech elements represented via a hands-free system.
- the language the person 10 is through a special space transfer function RÜF changed, i.e. that of the speaker 10 on the microphone 20 incoming speech elements are, for example, due to sound reflections on nearby objects and by reverberating in Rooms and possibly superimposed by external noise.
- the electrical signal of the microphone 20 remote from the speaker is pre-amplified by a preamplifier 22 and arrives at a Compensation filter 24 for compensation of varying microphone and amplifier frequency responses.
- the filtered electrical Signal is the data processing system 17 for Speech recognition fed.
- the correction unit 14 After in transmission channel 12 the correction unit 14 generates an electrical speech signal, which has the same spatial characteristics as that Speech signal of the second transmission channel 19, it plays for the speech recognition doesn't matter whether during the training phase or the same microphone during the recognition phase 14 or 20 is used.
- the correction unit 15 So it is possible to use both the handset and the phone can also be used in handsfree mode.
- Figure 2 shows a variant of the device of Figure 1.
- the correction unit 15 designed as an adaptive filter, i.e. the filter parameters become dependent on the recorded audio signals varied.
- the detection rate can be increased in this way.
- the compensation filters 18 and 24 in the two Transmission channels 12 and 19 are designed as adaptive filters; their filter parameters are dependent on the recorded ones Audio signals set.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Circuit For Audible Band Transducer (AREA)
Description
- Figur 1
- eine Einrichtung zur Spracherkennung, wobei die Sprache über ein Telefon eingegeben wird, und
- Figur 2
- eine Einrichtung nach Figur 1 mit adaptiven Filtern.
Claims (11)
- Einrichtung zur Spracherkennung,
bei der die Sprache wahlweise mittels eines sprechernahen Mikrofons (14) in elektrische Signale gewandelt und über einen ersten Übertragungskanal (12) einem Erkennungssystem (17)
oder mittels eines sprecherfernen Mikrofons (20) in elektrische Signale gewandelt und über einen zweiten Übertragungskanal (19) dem Erkennungssystem (17) zugeführt wird,
und bei der das Erkennungssystem (17) die mittels des jeweiligen Mikrofons (14, 20) aufgenommenen Sprachelemente mit zuvor in einer Trainingsphase gelernten Sprachelementen vergleicht und bei Übereinstimmung ein Erkennungssignal erzeugt,
dadurch gekennzeichnet, daß in den ersten Übertragungskanal (12) eine Korrektureinheit (15) geschaltet ist,
welche das elektrische Signal so abändert, daß es Raumübertragungseigenschaften hat, wie sie bei der Aufnahme mit einem sprecherfernen Mikrofon auftreten. - Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Korrektureinheit (15) Schallreflexionen an nahen Objekten nachbildet.
- Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Korrektureinheit (15) das Nachhallen in Räumen nachbildet.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Korrektureinheit (15) als stationäres oder als adaptives Filter ausgebildet ist.
- Einrichtung nach Anspruch 4, dadurch gekennzeichnet, daß am adaptiven Filter (15) die Filterparameter abhängig von den aufgenommenen Audiosignalen eingestellt werden.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der erste Übertragungskanal (12) und der zweite Übertragungskanal (19) jeweils einen Vorverstärker (16, 22) für das Mikrofon (14, 20) enthalten.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß jeder Übertragungskanal (12, 19) ein Kompensationsfilter (18, 24)) zur Kompensation variierender Mikrofon- und Verstärkerfrequenzgänge enthält.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Erkennungssystem (17) als Spracherkennungsverfahren die Spektralanalyse oder die LPC-Ceptralanalyse anwendet.
- Verfahren zum Erkennen von Sprache,
bei dem die Sprache wahlweise mittels eines sprechernahen Mikrofons (14) in elektrische Signale gewandelt und über einen ersten Übertragungskanal (12) einem Erkennungssystem (17)
oder mittels eines sprecherfernen Mikrofons (20) in elektrische Signale gewandelt und über einen zweiten Übertragungskanal (19) dem Erkennungssystem (17) zugeführt wird,
und bei dem im Erkennungssystem (17) die mittels des jeweiligen Mikrofons (14, 20) aufgenommenen Sprachelemente mit zuvor in einer Trainingsphase gelernten Sprachelementen verglichen und bei Übereinstimmung ein Erkennungssignal erzeugt wird,
dadurch gekennzeichnet, daß in den ersten Übertragungskanal (12) eine Korrektureinheit (15) geschaltet wird, wobei
das elektrische Signal so abgeändert wird, daß es Raumübertragungseigenschaften hat, wie sie bei Aufnahme mit dem sprecherfernen Mikrofon auftreten. - Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß durch die Korrektureinheit (15) Schallreflexionen an nahen Objekten nachgebildet werden.
- Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß durch die Korrektureinheit (15) das Nachhallen in Räumen nachgebildet wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19811879 | 1998-03-18 | ||
DE19811879A DE19811879C1 (de) | 1998-03-18 | 1998-03-18 | Einrichtung und Verfahren zum Erkennen von Sprache |
PCT/DE1999/000289 WO1999048086A1 (de) | 1998-03-18 | 1999-02-03 | Mikrophonanordnung für die spracherkennung unter variablen räumlichen bedingungen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1062487A1 EP1062487A1 (de) | 2000-12-27 |
EP1062487B1 true EP1062487B1 (de) | 2003-06-11 |
Family
ID=7861400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99914401A Expired - Lifetime EP1062487B1 (de) | 1998-03-18 | 1999-02-03 | Mikrophonanordnung für die spracherkennung unter variablen räumlichen bedingungen |
Country Status (6)
Country | Link |
---|---|
US (1) | US7043427B1 (de) |
EP (1) | EP1062487B1 (de) |
AT (1) | ATE242873T1 (de) |
DE (2) | DE19811879C1 (de) |
ES (1) | ES2201695T3 (de) |
WO (1) | WO1999048086A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101952884B (zh) * | 2008-02-27 | 2012-04-04 | 索尼爱立信移动通讯有限公司 | 响应于目标说话人话音识别对麦克风信号进行自适应滤波的电子设备和方法 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19963142A1 (de) * | 1999-12-24 | 2001-06-28 | Christoph Bueltemann | Verfahren und Vorrichtung zur sprachgesteuerten Bedienung eines Kiosksystems |
DE10052991A1 (de) * | 2000-10-19 | 2002-05-02 | Deutsche Telekom Ag | Verfahren zur Ermittlung raumakustischer und elektroakustischer Parameter |
US20070239441A1 (en) * | 2006-03-29 | 2007-10-11 | Jiri Navratil | System and method for addressing channel mismatch through class specific transforms |
US20090018826A1 (en) * | 2007-07-13 | 2009-01-15 | Berlin Andrew A | Methods, Systems and Devices for Speech Transduction |
US8696458B2 (en) * | 2008-02-15 | 2014-04-15 | Thales Visionix, Inc. | Motion tracking system and method using camera and non-camera sensors |
US11012732B2 (en) | 2009-06-25 | 2021-05-18 | DISH Technologies L.L.C. | Voice enabled media presentation systems and methods |
US20150228274A1 (en) * | 2012-10-26 | 2015-08-13 | Nokia Technologies Oy | Multi-Device Speech Recognition |
US10229672B1 (en) | 2015-12-31 | 2019-03-12 | Google Llc | Training acoustic models using connectionist temporal classification |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5267323A (en) * | 1989-12-29 | 1993-11-30 | Pioneer Electronic Corporation | Voice-operated remote control system |
DE4312155A1 (de) * | 1993-04-14 | 1994-10-20 | Friedrich Dipl Ing Hiller | Verfahren und Vorrichtung zur Verbesserung der Erkennungsleistung und Erhöhung der Zuverlässigkeit bei der automatischen Spracherkennung in geräuschvoller Umgebung |
US5528731A (en) * | 1993-11-19 | 1996-06-18 | At&T Corp. | Method of accommodating for carbon/electret telephone set variability in automatic speaker verification |
US5515445A (en) * | 1994-06-30 | 1996-05-07 | At&T Corp. | Long-time balancing of omni microphones |
US5737485A (en) * | 1995-03-07 | 1998-04-07 | Rutgers The State University Of New Jersey | Method and apparatus including microphone arrays and neural networks for speech/speaker recognition systems |
US5765124A (en) * | 1995-12-29 | 1998-06-09 | Lucent Technologies Inc. | Time-varying feature space preprocessing procedure for telephone based speech recognition |
US6275800B1 (en) * | 1999-02-23 | 2001-08-14 | Motorola, Inc. | Voice recognition system and method |
US6219645B1 (en) * | 1999-12-02 | 2001-04-17 | Lucent Technologies, Inc. | Enhanced automatic speech recognition using multiple directional microphones |
-
1998
- 1998-03-18 DE DE19811879A patent/DE19811879C1/de not_active Expired - Fee Related
-
1999
- 1999-02-03 DE DE59905927T patent/DE59905927D1/de not_active Expired - Lifetime
- 1999-02-03 ES ES99914401T patent/ES2201695T3/es not_active Expired - Lifetime
- 1999-02-03 US US09/646,315 patent/US7043427B1/en not_active Expired - Fee Related
- 1999-02-03 EP EP99914401A patent/EP1062487B1/de not_active Expired - Lifetime
- 1999-02-03 AT AT99914401T patent/ATE242873T1/de not_active IP Right Cessation
- 1999-02-03 WO PCT/DE1999/000289 patent/WO1999048086A1/de active IP Right Grant
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101952884B (zh) * | 2008-02-27 | 2012-04-04 | 索尼爱立信移动通讯有限公司 | 响应于目标说话人话音识别对麦克风信号进行自适应滤波的电子设备和方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1062487A1 (de) | 2000-12-27 |
ATE242873T1 (de) | 2003-06-15 |
US7043427B1 (en) | 2006-05-09 |
ES2201695T3 (es) | 2004-03-16 |
DE59905927D1 (de) | 2003-07-17 |
DE19811879C1 (de) | 1999-05-12 |
WO1999048086A1 (de) | 1999-09-23 |
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