WO2002043049A1 - Verfahren zur steuerung eines eine akustische ausgabeeinrichtung aufweisenden geräts - Google Patents
Verfahren zur steuerung eines eine akustische ausgabeeinrichtung aufweisenden geräts Download PDFInfo
- Publication number
- WO2002043049A1 WO2002043049A1 PCT/EP2001/013468 EP0113468W WO0243049A1 WO 2002043049 A1 WO2002043049 A1 WO 2002043049A1 EP 0113468 W EP0113468 W EP 0113468W WO 0243049 A1 WO0243049 A1 WO 0243049A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- volume
- output
- command signal
- acoustic
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims description 13
- 230000009467 reduction Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 230000005236 sound signal Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 230000003044 adaptive effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012804 iterative process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/26—Speech to text systems
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
- G10L2015/223—Execution procedure of a spoken command
Definitions
- the invention relates to a method for controlling a device having an acoustic output device by means of acoustic command signals. Furthermore, the invention relates to a device with an acoustic output device, with a receiving device for receiving acoustic command signals, with a recognition device for recognizing these command signals and with a control device for controlling the device as a function of a recognized command signal.
- Switchable devices such as alarm clocks or lights have been on the market for a long time, which can be switched on or off or switched back and forth between different modes by means of very simple acoustic command signals, for example noises such as clapping or whistling.
- voice recognition systems there are also devices that can recognize and accept various voice commands as command signals, so that more complicated controls of such devices are also possible.
- voice-controllable devices are extremely convenient since the operator can operate the respective device hands-free.
- This control method therefore has great advantages wherever the operator needs his hands for other activities, for example when controlling a car radio, in which the operator does not have to take his hands off the steering wheel to change the volume or to set a new channel.
- this method is also very attractive in general for the operation of devices because such a voice control enables the interface between man and machine (MMI; man-machine interface) from the previously common communication level of machines, namely operation using buttons and Regulators to which the person's own communication level, namely the transmission of information by voice, is shifted.
- MMI man-machine interface
- the recognition device which is intended to identify the command signals not only receives the command signal alone, but also the acoustic output signal generated by the device itself (for example, the music played on a CD player) as an acoustic echo.
- the own output signal is therefore like a background noise below the command signal. Depending on the volume of the command signal or the own output signal, this leads to considerable problems in recognizing the command signals.
- AEC method Acoustic Echo Cancellation
- the output signal generated by the device itself is used to estimate a room impulse response signal, that is to say to estimate the signal caused by a Reflection of the output signal within the room in which the device is located is detected again by the recording device.
- This takes place in a so-called “adaptive filter method” in which iteratively determines a transfer function with which the original output signal is first transformed and then that output signal thus transformed is subtracted in a filter from the received total input signal.
- the method is adaptive insofar as the iteration process is continuously continued and thus changes in space that are associated with a change in the transfer function are recorded.
- the volume is immediately reduced by the device itself as soon as the device recognizes that a possible acoustic command signal is being transmitted to the device.
- the command signal for the device can be recognized more easily and reliably due to the smaller acoustic echo.
- the reduction in volume also reduces the so-called "Lombard effect", which means that a person automatically speaks differently, for example louder and more accentuated, when he has to respond to background noise, which inevitably has an impact on the recognition performance of a speech recognition system.
- a corresponding device must first have an acoustic output device, a receiving device for receiving the acoustic
- Command signals for example a conventional microphone, and a detection device for recognizing these command signals and a control device for controlling the device depending on a detected command signal.
- the device must have suitable means for detecting that the receiving device is receiving a possible command signal for the device, as well as suitable means with which the volume of the output signal output by the acoustic output device is reduced as soon as the reception of a possible command signal for the device is recognized becomes.
- the device can be equipped or set so that a word spoken by a specific user in a defined volume and / or pitch and / or speaking direction is recognized as a possible command signal and the volume is then reduced.
- the actual command signal is preceded by a key command signal, the volume of which is reduced when it is detected.
- This key command signal is expediently the command signal which puts the device into a ready state for receiving further command signals, ie which first activates the control device of the respective device.
- Such key command signals are particularly useful when there are several voice-controllable devices in the same environment, each of which accepts similar or identical command signals.
- the device for which a specific command signal is intended must be addressed by a preceding key command signal by means of a corresponding key command signal.
- a voice-controlled computer and a television set could be arranged directly next to one another, and the command signals for the devices are preceded by the key command signal “computer” or “TV”.
- the automatic reduction in the volume of the output signal of the device upon detection of the key command signal also has the advantage that the user is immediately informed in this way that the respective device is in the ready state for receiving further command signals and, so to speak, "listening" to the user.
- the device can also additionally give a visual or acoustic confirmation of the receipt of the key command signal.
- the volume is preferably increased automatically again after a command signal - for example following the key command - has been recognized.
- the volume it is possible for the volume to be automatically reset to the previously set value after a certain period of time after the key command signal or a command signal has been detected. In this case the device would still work after receiving a command signal wait a certain time until another command signal comes. Only then would the device automatically switch back from the ready state or activated state.
- the volume of the output signal is reduced as a function of a determined command signal energy.
- Command signal energy is understood here to mean the signal energy of the received command signals, the key command signal naturally also being understood as a - special - command signal in this sense.
- the volume of the own output signal of this device could only be reduced if the own output signal is actually so loud in relation to the command signals that reliable detection of the command signals can no longer be guaranteed. This can be controlled in a simple manner by determining the relationship between the output signal energy or the signal energy of the ascertained or estimated acoustic echo of the output signal and the command signal energy. The volume is only reduced if this ratio lies within a certain value range with respect to a predetermined threshold value.
- the volume is only reduced if this ratio is above a predetermined threshold value.
- the ratio of the command signal energy to the output signal energy or the energy of the acoustic echo is determined, the volume is only reduced if this ratio is below a predetermined threshold value.
- the command signal energy can be measured, for example, at the input of the receiving device or the microphone.
- Output signal reduced until the ratio of the signal energies is at a predetermined value.
- This ratio can be defined and set beforehand by the user or can also be defined automatically in that a certain recognition reliability of the recognition device is achieved. In this case in particular, it makes sense if the device has additional means for visual or acoustic display, which indicate that the key command signal has been recognized, since the user cannot always rely on the volume being reduced after the key command signal has been recognized.
- the device preferably additionally has a filter device for filtering out an acoustic echo of the output signal output by the device itself from the overall signal received by the device. This means that the new method is used in addition to an AEC method in order to achieve optimal detection performance.
- Typical voice commands that are used to control audio devices or audiovisual devices are command words to control the volume of the device.
- Such “volume command signals” can, for example, be the words “louder” or “quieter”.
- the device itself after such a volume command signal has been recognized, initially resets the volume to the value set before the reduction, and only then does the volume return to a value corresponding to the volume command signal This means, for example, that the volume is reduced by a certain level when the word "quieter” is recognized or raised by a certain level when the word "louder” is recognized.
- the single figure shows a schematic block diagram of an audio device 1, for example a CD player, only the components essential to the invention being shown.
- the audio device 1 initially has an audio signal source 6.
- this audio signal source 6 is, for example, the CD Drive, the scanner and the electronics for converting the acquired optical data into the audio signal.
- the audio signal generated by the audio signal source 6 is then forwarded to an amplifier 8, for example a conventional output stage 8, and from there is output via an acoustic output device 2, here a conventional loudspeaker 2.
- the device 1 has a control device 5, which can be implemented, for example, in the form of a microcontroller or the like.
- the audio signal source 6 can be controlled by means of this control device 5, for example a special title on a CD can be selected.
- This control option is indicated in the figure by the control line 18 shown.
- Control device 5 the volume of the device 1 can be regulated. This is done by controlling the output stage 8. This control option is shown in the figure by the control line 19.
- the device 1 receives the commands for the control in the form of acoustic signals
- Command signals BS here voice commands, which the user inputs via a recording device 3, here a microphone 3, and which are forwarded via lines 14, 15 to a recognition device 4, here a speech recognition system 4.
- the recognized command is then forwarded via the signal line 17 to the control device 5, which then controls the individual components of the device 1 in accordance with the command received.
- the microphone 3 not only detects the command signal BS, but also an acoustic echo AE, which is generated by the acoustic signal emitted by the loudspeaker 2 of the device 1 itself, here the music from the CD.
- the acoustic echo AE depends not only on the output signal, but also on the acoustic parameters of the room.
- the device has a filter device 9 (hereinafter referred to as AEC unit) in which the acoustic echo AE is filtered out from the overall signal received at the microphone 3.
- the output signal is tapped from the signal output branch, which runs from the audio signal source 6 via the output stage 8 to the loudspeaker 2, in front of the output stage 8 at the tap point 21 and is connected to the AEC via a signal line 11.
- This transfer function corresponds to the estimated room impulse response.
- the current room impulse response is determined using an iterative process, which is constantly updated and therefore adaptive filtering is carried out, which takes into account changes in the room, for example due to movements of people or objects.
- the output signal transformed by means of the transfer function is subtracted in an adder 10 of the AEC unit 9 from the overall signal coming from the microphone 3 via the signal line 14.
- the residual signal which ideally only corresponds to the command signal BS, is then forwarded to the speech recognition system 4 via the output line 15 by the AEC unit 9.
- the AEC device 9 also has an input 12 at which the control signal, which is output via the control line 19 from the control device 5 to the output stage 8, for regulating the volume is present.
- the coefficients for the transfer function can thus be scaled according to the volume set.
- the device 1 additionally has means 7 in the form of an attenuator 7, with which the volume of the device 1 can be reduced when a key command signal SBS is recognized by the speech recognition system 4.
- this key command signal SBS must therefore be spoken by the user as the first command signal.
- the speech recognition system 4 is designed in such a way that it only responds to this special key command signal SBS, i.e. here a certain password, such as the word "CD", is waiting. After this password has been accepted, the entire complex command vocabulary of the speech recognition system 4 is first activated, and the device 1 is in a standby mode in which further command signals are recognized and accepted, for example commands such as "louder”, “quieter”, “next title”, title 5 "etc. After the respective command signal BS following the key command signal SBS has been recognized, the device 1 switches back to a state where it returns to the key command signal SBS waiting.
- the attenuator 7 When the key command signal SBS is detected, the attenuator 7 is activated automatically by the control device 5 via the control line 20 and the volume of the device's own output signal is thus reduced. This makes it easier for the speech recognition system 4 to identify the subsequent command signal BS, ie the actual command.
- This decrease in volume can, for example, by a certain value, e.g. B. 10 dB, or to a preset volume level. It is also possible to reduce the volume to zero.
- the signals present at the signal input branch upstream and downstream of the filter 10 are fed to the control device 5 via the signal lines 13, 16. From these signals in front of and behind the filter 10, the control device 5 can determine which signal energy the acoustic echo AE has on the microphone and which signal energy has the command signal BS that is actually desired.
- the control device 5 is designed such that it reduces the volume of the output signal by means of the attenuator 7 to such an extent that there is a certain relationship between the signal energy of the acoustic echo AE and the signal energy of the command signal BS. If the ratio of the signal energies is already below this value, the volume is not reduced any further.
- the attenuator 7 in the signal output branch can be bridged in the exemplary embodiment shown and the user can, if desired, override the function according to the invention.
- the separate attenuator 7 is arranged in the signal output branch here in such a way that the signal is attenuated before the branch point 21 for tapping the output signal for the AEC unit 9. As a result, it is automatically taken into account that when the volume is reduced, the AEC unit 9 reduces this volume when
- the volume could be reduced by the control device 5 after detection of the key command signal SBS by regulating the output stage 8.
- the recognition accuracy of the speech control is considerably improved by reducing the distortion of the input signal of the speech recognizer.
- a very user-friendly voice interface is created, since the user receives feedback from the device 1 by reducing the volume that this is ready for a voice command.
- additional feedback can follow through a visual or further acoustic signal, for example a signal tone.
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- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Circuit For Audible Band Transducer (AREA)
- Selective Calling Equipment (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002544708A JP2004514926A (ja) | 2000-11-27 | 2001-11-19 | 音響出力手段を備えたデバイスの制御方法 |
EP01991744A EP1340224A1 (de) | 2000-11-27 | 2001-11-19 | Verfahren zur steuerung eines eine akustische ausgabeeinrichtung aufweisenden geräts |
KR1020027009554A KR20020071966A (ko) | 2000-11-27 | 2001-11-19 | 음향 출력 디바이스를 포함하는 유닛의 제어 방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10058786.0 | 2000-11-27 | ||
DE10058786A DE10058786A1 (de) | 2000-11-27 | 2000-11-27 | Verfahren zum Steuerung eines eine akustische Ausgabeeinrichtung aufweisenden Geräts |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002043049A1 true WO2002043049A1 (de) | 2002-05-30 |
Family
ID=7664796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/013468 WO2002043049A1 (de) | 2000-11-27 | 2001-11-19 | Verfahren zur steuerung eines eine akustische ausgabeeinrichtung aufweisenden geräts |
Country Status (7)
Country | Link |
---|---|
US (1) | US20030138118A1 (de) |
EP (1) | EP1340224A1 (de) |
JP (1) | JP2004514926A (de) |
KR (1) | KR20020071966A (de) |
CN (1) | CN1216364C (de) |
DE (1) | DE10058786A1 (de) |
WO (1) | WO2002043049A1 (de) |
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US10031591B2 (en) | 2015-05-08 | 2018-07-24 | Contour Design, Inc. | Pointing device bracket assembly and system |
US10379635B2 (en) | 2013-02-05 | 2019-08-13 | Contour Design, Inc. | Pointing device |
US11023053B2 (en) | 2016-11-11 | 2021-06-01 | Contour Innovations Llc | Inner-sensor pointing device system |
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US9319741B2 (en) | 2006-09-07 | 2016-04-19 | Rateze Remote Mgmt Llc | Finding devices in an entertainment system |
US8607281B2 (en) * | 2006-09-07 | 2013-12-10 | Porto Vinci Ltd. Limited Liability Company | Control of data presentation in multiple zones using a wireless home entertainment hub |
US8214219B2 (en) * | 2006-09-15 | 2012-07-03 | Volkswagen Of America, Inc. | Speech communications system for a vehicle and method of operating a speech communications system for a vehicle |
JP5380777B2 (ja) * | 2007-02-21 | 2014-01-08 | ヤマハ株式会社 | 音声会議装置 |
KR101590332B1 (ko) | 2012-01-09 | 2016-02-18 | 삼성전자주식회사 | 영상장치 및 그 제어방법 |
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CN102945672B (zh) * | 2012-09-29 | 2013-10-16 | 深圳市国华识别科技开发有限公司 | 一种多媒体设备语音控制系统及方法 |
US9165566B2 (en) | 2013-01-24 | 2015-10-20 | Microsoft Technology Licensing, Llc | Indefinite speech inputs |
DE102013012453B3 (de) * | 2013-07-26 | 2014-10-16 | Audi Ag | Verfahren zum Betreiben eines Infotainment-Systems eines Kraftwagens und Infotainment-System für einen Kraftwagen |
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KR102338041B1 (ko) * | 2014-09-29 | 2021-12-10 | 현대모비스 주식회사 | 음성 인식 장치 및 방법 |
CN104505092B (zh) * | 2014-12-10 | 2017-12-22 | 广东美的制冷设备有限公司 | 空调器语音控制方法和系统 |
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CN106409294B (zh) * | 2016-10-18 | 2019-07-16 | 广州视源电子科技股份有限公司 | 防止语音命令误识别的方法和装置 |
WO2018090252A1 (zh) * | 2016-11-16 | 2018-05-24 | 深圳达闼科技控股有限公司 | 机器人语音指令识别的方法及相关机器人装置 |
KR102398390B1 (ko) * | 2017-03-22 | 2022-05-16 | 삼성전자주식회사 | 전자 장치 및 전자 장치의 제어 방법 |
CN110678922A (zh) * | 2017-12-06 | 2020-01-10 | 谷歌有限责任公司 | 闪避和擦除来自附近设备的音频 |
JP6929811B2 (ja) * | 2018-03-13 | 2021-09-01 | Tvs Regza株式会社 | 音声対話端末、および音声対話端末制御方法 |
CN109658930B (zh) * | 2018-12-19 | 2021-05-18 | Oppo广东移动通信有限公司 | 语音信号处理方法、电子装置及计算机可读存储介质 |
WO2020140271A1 (zh) * | 2019-01-04 | 2020-07-09 | 珊口(上海)智能科技有限公司 | 移动机器人的控制方法、装置、移动机器人及存储介质 |
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2000
- 2000-11-27 DE DE10058786A patent/DE10058786A1/de not_active Ceased
-
2001
- 2001-11-19 EP EP01991744A patent/EP1340224A1/de not_active Withdrawn
- 2001-11-19 JP JP2002544708A patent/JP2004514926A/ja active Pending
- 2001-11-19 US US10/240,592 patent/US20030138118A1/en not_active Abandoned
- 2001-11-19 WO PCT/EP2001/013468 patent/WO2002043049A1/de not_active Application Discontinuation
- 2001-11-19 KR KR1020027009554A patent/KR20020071966A/ko not_active Application Discontinuation
- 2001-11-19 CN CN018042198A patent/CN1216364C/zh not_active Expired - Fee Related
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Cited By (3)
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---|---|---|---|---|
US10379635B2 (en) | 2013-02-05 | 2019-08-13 | Contour Design, Inc. | Pointing device |
US10031591B2 (en) | 2015-05-08 | 2018-07-24 | Contour Design, Inc. | Pointing device bracket assembly and system |
US11023053B2 (en) | 2016-11-11 | 2021-06-01 | Contour Innovations Llc | Inner-sensor pointing device system |
Also Published As
Publication number | Publication date |
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JP2004514926A (ja) | 2004-05-20 |
KR20020071966A (ko) | 2002-09-13 |
CN1216364C (zh) | 2005-08-24 |
US20030138118A1 (en) | 2003-07-24 |
DE10058786A1 (de) | 2002-06-13 |
EP1340224A1 (de) | 2003-09-03 |
CN1397063A (zh) | 2003-02-12 |
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