JP2003345387A - Sound controller and acoustic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user to input a voice from a microphone of a voice recognition device while listening to music by an audio device. <P>SOLUTION: A synthesized sound signal d of audio sounds b which is outputted from a loudspeaker 5 of an audio device 1 and is inputted to a microphone 12 and a voice c for voice recognition which is spoken by a user P and is inputted to the microphone 12 is sent to a sound controller 21, and the synthesized sound signal d and an audio signal a from the audio device 1, whose phase is inverted by a phase inversion part 23 are added by an adder 26 to remove the audio signal a from the synthesized sound signal d. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice control device and a voice device used in an acoustic environment in which an audio device and a voice recognition device are used together.

[0002]

2. Description of the Related Art Conventionally, radios, televisions, cassette tapes, CDs, Ms, etc., have been installed in transport planes such as automobiles, ships and aircraft.
An audio device for reproducing D, DVD, etc. is installed, and it is useful for reducing the effort of a person who drives a transportation machine. In addition, the operation input should be made by voice so that the person driving the transporter can operate the equipment while paying attention to the front, and operate the equipment by recognizing the voice input from the microphone with the voice recognition device. Has also been done. In particular, recently, a navigation device is used as a highly accurate navigation system, and a voice recognition device is often used to improve operability.

When an audio device and a voice recognition device are used at the same time, that is, when a command word for voice recognition is input from a microphone while listening to a radio or the like, the voice output from the speaker is simultaneously picked up by the microphone. This causes noise and is hardly recognized by the voice recognition device. For this reason, conventionally, when operating the voice recognition device, voice input is performed after turning off the power of the radio or the like or reducing the volume to a low level.

[0004]

However, it is a general sentiment to avoid turning off the power or reducing the volume to zero while enjoying music or the like with an audio device unless it is unavoidable. Therefore, there has been a strong demand for operating the voice recognition device while listening to the radio.

The present invention addresses such conventional problems, and a voice control device capable of simultaneously operating a voice recognition device while operating an audio device,
An object is to provide an audio device using this voice control device.

In order to achieve the above object, the voice control device of the present invention provides the microphone in a sound environment in which a voice recognition device for recognizing voice input to a microphone and an audio device for outputting an audio signal are used together. An audio signal canceling means is provided for canceling the audio signal from a synthesized voice signal of the voice for voice recognition input to the microphone and the audio voice output from the audio device and input to the microphone. With this configuration, the voice can be input from the microphone while listening to the audio device, and the voice recognition device can be operated without impairing the listening feeling of the user.

Further, in the audio control device of the present invention, the audio signal canceling means adds a phase inversion unit which inverts the phase of the audio signal, the audio signal whose phase is inverted, and the synthesized audio signal. And an adder. With this configuration, the audio signal from the sound source can be removed with a simple circuit.

Further, the audio control device of the present invention is characterized in that the audio signal canceling means has a subtracter for subtracting the audio signal from the synthesized audio signal. With this configuration, the audio signal from the sound source can be removed with a simple circuit.

The audio device of the present invention comprises a voice recognition device for recognizing a voice input to a microphone, an audio device for outputting an audio signal, a voice recognition voice input to the microphone and the audio device. An audio signal canceling means for canceling the audio signal from a synthesized voice signal output with the audio voice input to the microphone is provided. With this configuration, the voice can be input from the microphone while listening to the audio device, and the voice recognition device can be operated without impairing the listening feeling of the user.

Further, in the audio device of the present invention, the audio signal canceling means adds a phase inverting section for inverting the phase of the audio signal, and an addition for adding the phase-inverted audio signal and the synthesized voice signal. And a container. With this configuration, the audio signal from the sound source can be removed with a simple circuit.

The audio device of the present invention is characterized in that the audio signal canceling means has a subtracter for subtracting the audio signal from the synthesized voice signal. With this configuration, the audio signal from the sound source can be removed with a simple circuit.

The audio device of the present invention is characterized in that the audio signal canceling means is incorporated in the voice recognition device. With this configuration, the configuration of the acoustic device can be simplified.

The audio device of the present invention is characterized in that the audio signal canceling means is incorporated in the audio device. With this configuration, the configuration of the acoustic device can be simplified.

Further, the audio device of the present invention is characterized in that the audio signal canceling means is incorporated in a voice recognition device attached to a vehicle-mounted navigation device.
With this configuration, the operability of the vehicle-mounted navigation device can be improved.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a vehicle-mounted acoustic device according to an embodiment of the present invention will be described with reference to the drawings. Figure 1
FIG. 1 is a schematic block diagram showing the configuration of an on-vehicle acoustic device according to an embodiment of the present invention. In FIG. 1, the audio device 1 includes a radio, a television, a cassette tape, a CD, and an M.
A sound source unit 2 for reproducing D, DVD, etc., a volume adjusting unit 3 for adjusting the volume of the audio signal a from the sound source unit 2, a power amplifier 4 for amplifying the volume-adjusted audio signal, and a power amplifier 4 Output of audio voice b
And a speaker 5 for outputting as. The navigation device 11 includes a microphone 12 for inputting an audio voice b from a speaker 5 and a voice c for voice recognition from a user P, a microphone amplifier 13 for amplifying a synthetic voice signal d output from the microphone 12, and a synthetic voice. A BPF (Band Pass Filter) 14 for limiting the frequency band of the signal d,
A voice recognition device 15 and a navigation control unit 16 are provided. The navigation control unit 16 uses the GPS (Gl
obal Positioning System) Means to detect the position of the vehicle based on signals received from satellites, vehicle speed sensors, and signals from direction sensors, and map data corresponding to the detected vehicle position is read out and displayed on the display together with the vehicle position. It is provided with a means for displaying, a means for searching for a recommended route to the destination input by the user, a means for searching facilities, etc., a means for guiding intersection and road traffic information, and the like. Voice control device 21
Is an input B of the audio signal a of the audio device 1.
A PF (Band Pass Filter) 22, a phase inversion unit 23 that inverts the phase of the band-limited audio signal a, a level detection unit 24 that inputs a signal from the BPF 14 of the navigation device 11, and a detected signal level. On the basis of the gain adjusting unit 25 for adjusting the signal level of the audio signal a and the signal level of the synthesized voice signal d based on the output, the output of the phase inverting unit 23 and the output of the gain adjusting unit 25 are added, and the addition result is obtained by the navigation device And an adder 26 for outputting to the voice recognition device 15. The BPF 14 of the navigation device 11 and the BPF 22 of the voice control device 21 have the same characteristics, and limit the voice signal to the voice band and remove other frequency components. The level detection unit 24 and the gain adjustment unit 25 of the voice control device 21 indicate that the signal level of the voice recognition voice c from the user P is the audio signal when the audio device 1 is off, that is, the audio voice is not output from the speaker 5. The gain is adjusted in advance so that the signal level is the same as that of a. The sound source unit 2 of the audio device 1 and the BPF 22 of the voice control device 21
Are connected with a connection cable 31, and the level detection unit 24 and the adder 26 of the voice control device 21 and the BPF 14 and the voice recognition device 15 of the navigation device 11 are connected with connection cables 32 and 33, respectively. In the navigation device 11, the microphone 12, the microphone amplifier 13, and the BPF 14 are integrally configured and arranged in the vicinity of the driver, and are independent of the main body of the navigation device 11 installed in the trunk room of the vehicle or under the seat. .

Next, the operation of the on-vehicle audio system according to this embodiment will be described with reference to the flow chart of FIG. In FIG. 2, first, the audio device 1, the navigation device 11, and the voice control device 21 are turned on, the audio signal a from the sound source unit 2 of the audio device 1 is adjusted by the volume adjusting unit 3, and the audio sound is output from the speaker 5. b
Is output (step S1). In this state, user P
When a voice for voice recognition is input to the microphone 12 (step S2), both the audio voice b from the speaker 5 and the voice c for voice recognition of the user are input to the microphone 12, and the microphone 12 outputs the voice. Outputs the synthesized synthesized voice signal d (step S
3). The synthesized voice signal d output is the microphone amplifier 13
After being amplified by, the BPF 14 cuts frequencies other than those in the voice band and sends them to the level detection unit 24 of the voice control device 21 (step S4). During this period, the audio signal a from the sound source unit 2 of the audio device 1 is sent to the BPF 22 of the voice control device 21, the frequency of the audio signal a is limited to the voice band by the BPF 22, and the phase thereof is changed by the phase inverting unit 23. It is inverted (step S5). The synthesized voice signal d whose signal level has been detected by the level detection unit 24 has its gain adjusted to the same level as the gain of the audio signal a by the gain adjustment unit 25, and then output by the adder 26 from the phase inversion unit 23. Is added. As a result, the audio signal a is removed from the synthesized voice signal d, and only the voice recognition voice signal of the user P remains (step S6). Therefore, by inputting the output of the adder 26 to the voice recognition device 15, voice recognition can be performed only by the voice c for voice recognition of the user P (step S7).

As described above, according to this embodiment, the audio voice b output from the speaker 5 of the audio device 1 and input to the microphone 12 and the voice input by the user P to the microphone 12 are input. A synthesized voice signal d with the recognition voice c is sent to the voice control device 21, and the synthesized voice signal d and the audio signal a from the audio device 1 whose phase is inverted by the phase inversion unit 23 are added by the adder 26. To synthesize audio signal d to audio signal a
Since the output of the adder 26 is input to the voice recognition device 15, voice recognition can be performed only by the voice for voice recognition of the user P, and the volume of music or the like is adjusted from the speaker 5. It is possible to perform the voice recognition by the voice recognition device 15 without listening to the voice recognition.

Further, according to the above embodiment, the voice control device 21 is independent of the audio device 1 and the navigation device 11, and the connection cables 31, 32, respectively.
Since the audio control device 21 is configured to be connected by 33, the audio control device 21 can be used as a retrofit device when the audio device 1 is provided with an audio signal output terminal.

In the above embodiment, the phase inverting section 23 and the adder 26 are used as means for removing the audio signal a from the synthesized voice signal d, but the same applies if a subtracter is used instead of this configuration. It is possible to obtain various effects. Also,
Although the microphone amplifier 13 and the BPF 14 are provided in the navigation device 11, they may be provided in the voice control device 21. Furthermore, without separating the voice control device 21 from the audio device 1 and the navigation device 11,
The voice control device 21 may be incorporated in the navigation device 11 or the voice recognition device 15, or may be incorporated in the audio device 1, and in any case, the device configuration can be simplified.

In the above embodiment, the voice recognition device 15 is a voice recognition device attached to the vehicle-mounted navigation device 16, but it may be a voice recognition device in a personal computer or other equipment.

[0021]

As described above, the voice control device of the present invention can be applied to a microphone in an acoustic environment in which a voice recognition device that recognizes a voice input to the microphone and an audio device that outputs an audio signal are used together. It is equipped with audio signal canceling means that cancels the audio signal from the synthesized voice signal of the input voice recognition voice and the audio voice output from the audio device and input to the microphone. Input can be made, and the voice recognition device can be operated without impairing the listening feeling of the user.

Further, the audio device of the present invention includes a voice recognition device for recognizing a voice input to a microphone, an audio device for outputting an audio signal, and a voice recognition voice and an audio device for input to the microphone. Since it is equipped with an audio signal canceling means that cancels the audio signal from the synthesized voice signal that is combined with the audio sound input to the microphone, it is possible to input the voice from the microphone while listening to the audio device, and impair the hearing of the user. Without, the voice recognition device can be operated.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing a configuration of an on-vehicle acoustic device according to an embodiment of the present invention.

FIG. 2 is a schematic flow chart showing the operation of the vehicle-mounted acoustic device according to the embodiment of the present invention.

[Explanation of symbols]

1 audio equipment 2 sound source section 3 Volume adjustment section 4 power amplifier 5 speakers 11 Navigation device 12 microphones 13 Microphone amplifier 14 BPF 15 Speech recognition device 16 Navigation controller 21 Voice control device 22 BPF 23 Phase inversion section 24 Level detector 25 Gain adjuster 26 adder 31, 32, 33 connection cable P user a Audio signal b audio voice c Voice recognition voice d Synthetic voice signal

Claims (9)

[Claims] 1. A voice recognition voice input to the microphone and an output from the audio device in an acoustic environment in which a voice recognition device that recognizes a voice input to a microphone and an audio device that outputs an audio signal are used together. A voice control device comprising audio signal canceling means for canceling the audio signal from a synthesized voice signal combined with the audio voice input to the microphone. 2. The audio signal canceling means includes a phase inverting unit that inverts the phase of the audio signal, and an adder that adds the audio signal whose phase is inverted and the synthesized voice signal. The voice control device according to claim 1. 3. The audio control device according to claim 1, wherein the audio signal canceling means has a subtracter for subtracting the audio signal from the synthesized audio signal. 4. A voice recognition device for recognizing voice input to a microphone, an audio device for outputting an audio signal, a voice recognition voice input to the microphone, and an output from the audio device for input to the microphone. An audio device comprising an audio signal canceling means for canceling the audio signal from a synthesized audio signal with the generated audio sound. 5. The audio signal canceling means includes a phase inverting unit that inverts the phase of the audio signal, and an adder that adds the audio signal whose phase is inverted and the synthesized voice signal. The acoustic device according to claim 4. 6. The audio device according to claim 4, wherein the audio signal canceling unit includes a subtracter that subtracts the audio signal from the synthesized audio signal. 7. The audio device according to claim 4, wherein the audio signal canceling means is incorporated in the voice recognition device. 8. The audio device according to claim 4, wherein the audio signal canceling means is incorporated in the audio device. 9. The audio device according to claim 4, wherein the audio signal canceling means is incorporated in a voice recognition device attached to a vehicle-mounted navigation device.