JP2012203172A - Voice output device, voice output method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an utterance content hardly to be heard by others around a speaker in conversation or the like on a portable phone without moving to a place where others are not present even when the speaker utters at a relatively high volume and to allow reduction in power consumption of a device such as a portable phone set.SOLUTION: A transmission part 11 obtains utterance of a speaker (ambient voice), and a transmission voice analysis part 172 analyzes the voice obtained by the transmission part 11. A noise output part 13 outputs a noise that masks the utterance of the speaker on the basis of the analysis result of the transmission voice analysis part 172. For example, the transmission voice analysis part 172 detects the frequency of the voice obtained by the transmission part 11 and the noise output part 13 outputs noise having a frequency close to that of the voice, thereby allowing the utterance of the speaker to be hidden from the others around the speaker by a relatively low volume noise and the power consumption to be reduced.

Description

  The present invention relates to an audio output device, an audio output method of the audio output device, and a program.

In a call using a mobile phone or the like, there is a case where an utterance that is not desired to be heard by other people around is performed. In such a case, it is conceivable that the speaker moves to a place where there is no other person and speaks (calls), or speaks at a low volume that is not heard by others around him.
However, when trying to move to a place where there is no other person, there may be no suitable place near the speaker. In addition, when speaking at a volume that is not heard by others in the vicinity, there is a risk that the other party will not be able to hear the voice of the speaker.

  On the other hand, when a driver performs a hands-free call in a car, the hands-free call device described in Patent Document 1 outputs a masking sound for masking call voice toward the passenger. By using this hands-free call device, it is said that the voice from the other party can be prevented from being heard by the passenger in the passenger seat, and privacy protection can be realized.

JP 2004-96664 A

  However, in the hands-free communication device described in Patent Document 1, it is necessary to output a mask sound with a large volume, which may increase power consumption. For example, road noise described in Patent Document 1 (sound generated between a rotating tire and a road surface as a vehicle travels) as a masking sound cannot be heard by a passenger in the passenger's seat. When output at a volume, the road noise becomes loud and power consumption may increase.

  An object of the present invention is to provide an audio output device, an audio output method, and a program that can solve the above-described problems.

  The present invention has been made to solve the above-described problems, and an audio output device according to an aspect of the present invention includes an audio acquisition unit that acquires audio and an audio analysis unit that analyzes audio acquired by the audio acquisition unit. And a voice output unit that outputs a voice different from the voice acquired by the voice acquisition unit based on the analysis result of the voice analysis unit.

  Moreover, the audio output method according to an aspect of the present invention is an audio output method of an audio output device, in which an audio acquisition step of acquiring audio, an audio analysis step of analyzing the audio acquired in the audio acquisition step, A voice output step of outputting a voice different from the voice acquired in the voice acquisition step based on the analysis result in the voice analysis step.

  In addition, a program according to an aspect of the present invention includes a voice acquisition step of acquiring a voice, a voice analysis step of analyzing the voice acquired in the voice acquisition step, and the voice analysis step. And a voice output step for outputting a voice different from the voice acquired in the voice acquisition step.

  According to the present invention, a speaker can speak at a relatively high volume without moving to a place where there is no other person, and power consumption can be reduced.

It is a block diagram which shows schematic structure of the mobile telephone in the 1st Embodiment of this invention. It is explanatory drawing of the telephone call using the mobile telephone in the embodiment. In the embodiment, it is explanatory drawing of the noise audio | voice output which a mobile telephone performs. In the same embodiment, it is explanatory drawing of the transmission voice analysis which a mobile telephone performs. 4 is a flowchart showing a procedure of processing performed by the mobile phone during a call in the embodiment. It is explanatory drawing which shows schematic structure of the mobile telephone in the 2nd Embodiment of this invention, and the noise audio | voice output which the said mobile telephone performs. 4 is a flowchart showing a procedure of processing performed by the mobile phone during a call in the embodiment. It is explanatory drawing which shows schematic structure of the mobile telephone in the 3rd Embodiment of this invention, and the noise audio | voice output which the said mobile telephone performs. 4 is a flowchart showing a procedure of processing performed by the mobile phone during a call in the embodiment. It is a block diagram which shows schematic structure of the audio | voice output apparatus in the 4th Embodiment of this invention.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram showing a schematic configuration of a mobile phone according to the first embodiment of the present invention. In the figure, a mobile phone 1 includes a transmitter (voice acquisition unit) 11, a receiver 12, a noise output unit (voice output unit) 13, a key operation unit 14, a display unit 15, and a wireless communication unit. 16 and a control unit 17. The control unit 17 includes an audio processing unit 171. The voice processing unit 171 includes a transmitted voice analysis unit (speech analysis unit) 172 and a noise acquisition unit 173.

The transmitter 11 has a microphone, acquires ambient sound, and converts it into audio data (digital audio signal). In particular, the transmitter 11 acquires the utterance of the speaker (user of the mobile phone 1) and converts it into voice data during a call.
The receiver 12 has a speaker and outputs a sound according to the sound data output from the sound processor 171. In particular, the receiving unit 12 outputs the other party's voice according to the voice data output from the voice processing unit 171 during a call.

  The noise output unit 13 has a speaker, like the receiver unit 12, and outputs noise sound (hereinafter simply referred to as “noise”) in accordance with the sound data output from the sound processing unit 171. The noise output by the noise output unit 13 is a mask for the utterance of the speaker (speech for hiding the utterance content of the speaker from others around the speaker, that is, the surrounding others are difficult to hear. Voice).

The key operation unit 14 has push buttons such as a numeric keypad, a direction key, and an enter button, and accepts a user operation input.
The display unit 15 has a display screen such as a liquid crystal panel, and displays various data such as still images, moving images, and texts under the control of the control unit 17.

  The wireless communication unit 16 has a wireless antenna and connects to a mobile phone communication network (a communication network for mobile phones provided by a telecommunications carrier) by wireless communication. The wireless communication unit 16 transmits and receives various data such as voice data at the time of a call and e-mail data when an e-mail is received or transmitted.

The control unit 17 controls each unit of the mobile phone 1.
The control unit 17 is realized by, for example, a central processing unit (CPU) included in the mobile phone 1 reading and executing a program from a storage device included in the mobile phone 1. Alternatively, the control unit 17 may be realized by other methods such as realization by dedicated hardware.

The audio processing unit 171 performs various processes related to audio. In particular, the voice processing unit 171 outputs the voice data of the speaker generated by the transmitter 11 to the wireless communication unit 16 during transmission, and transmits noise data based on the voice data of the speaker. And the noise output unit 13 outputs noise. A method by which the audio processing unit 171 (noise acquisition unit 173) acquires noise audio data will be described later.
Further, the voice processing unit 171 outputs the voice data of the communication partner received by the wireless communication unit 16 to the receiver unit 12 to output the voice.

The transmission voice analysis unit 172 analyzes the voice data of the speaker generated by the transmission unit 11.
The noise acquisition unit 173 acquires noise voice data based on the analysis result of the transmission voice analysis unit 172.

FIG. 2 is an explanatory diagram of a call using the mobile phone 1. In the figure, the transmitter 11 obtains the ambient sound P11 with its microphone, converts it into audio data, and outputs it to the audio processor 171. Here, the ambient sound P11 acquired by the transmitter 11 includes the speech of the speaker, and the ambient sound P11 acquired by the transmitter 11 is, unless the ambient noise of the mobile phone 1 is particularly loud. It can be equated with the speaker's utterance. In the following, unless there is a particular need for distinction, the ambient sound acquired by the transmitter 11 and the utterance of the speaker are identified.
Also, the receiver 12 outputs the call partner's voice P12 based on the call partner's voice data output by the voice processor 171.

FIG. 3 is an explanatory diagram of noise sound output performed by the mobile phone 1. In the figure, the noise acquisition unit 173 acquires noise audio data and outputs it to the noise output unit 13, and the noise output unit 13 outputs noise P13 according to the audio data.
The noise P13 output from the noise output unit 13 is superimposed on the utterance P11 of the user of the mobile phone 1 and reaches the other person in the surrounding area, thereby becoming a mask for the utterance P11.

  FIG. 4 is an explanatory diagram of transmitted voice analysis performed by the mobile phone 1. In the figure, a transmission voice analysis unit 172 analyzes voice data output by the transmission unit 11 by acquiring ambient sounds and detects the frequency of the voice. Then, the noise acquisition unit 173 acquires noise voice data based on the frequency detected by the transmission voice analysis unit 172. As described with reference to FIG. 3, the noise output unit 13 outputs noise according to the audio data acquired by the noise acquisition unit 173.

The transmitted voice analysis unit 172 detects the frequency of the speaker's utterance P11 (frequency of the voice of the speaker), and the noise acquisition unit 173 has noise voice data having a frequency close to the frequency based on the frequency. Is obtained and output to the noise output unit 13, the noise output unit 13 can output noise P13 having a frequency close to the voice of the speaker.
The noise output unit 13 outputs noise having a frequency close to that of the speaker's voice, so that the content of the speaker's speech can be hidden from others around the speaker with relatively low noise. . Therefore, an increase in power consumption of the mobile phone 1 due to noise output can be suppressed.

  In addition, the noise output part 13 outputs the audio | voice different from a speaker's utterance as noise. The noise referred to here may be a sound for concealing the utterance content of the speaker from others around the speaker, and may be a naturally occurring sound (for example, a sound recording wind sound or water sound). For example, a voice that does not have information to be transmitted may be used, or a voice that has information to be transmitted, such as a voice that is delayed from the speaker's utterance, may be a voice that interferes with the speech of the speaker. That's fine.

  Here, when the noise output unit 13 outputs the utterance of the speaker acquired by the transmission unit 11 without delay, the voice output from the noise output unit 13 amplifies the utterance of the speaker, and instead of the speaker's utterance. As a result, it is easy for the surrounding third parties to hear. In order to avoid this, the noise output unit 13 is different from the utterance of the speaker acquired by the transmission unit 11, such as voice having a content different from that of the speaker or voice delayed from the speaker's utterance. Output audio.

  For example, the noise acquisition unit 173 includes voice data generation means such as a synthesizer, and generates voice data of noise having a frequency close to the frequency detected by the transmission voice analysis unit 172, so that the transmission voice analysis unit 172 Obtain audio data of noise with a frequency close to the frequency to be detected. The voice data generated by the noise acquisition unit 173 using a synthesizer or the like can be, for example, voice data having no meaning as a language such as “Ah” of the voice of the speaker.

Alternatively, the noise acquisition unit 173 may acquire the noise audio data by selecting any noise audio data from among a plurality of noise audio data included in the mobile phone 1 in advance. For example, the mobile phone 1 includes a storage device, and the storage device stores sound data of noise having a plurality of frequencies in advance. Then, the noise acquisition unit 173 reads out from the storage device the noise data having the frequency closest to the frequency detected by the transmission voice analysis unit 172, and outputs it to the noise output unit 13.
In this way, the noise acquisition unit 173 selects any one of the plurality of noises that the mobile phone 1 has in advance, so that it is not necessary for the noise acquisition unit 173 to have audio data generation means such as a synthesizer. The configuration of the mobile phone 1 can be simplified.

  Even when the noise around the mobile phone 1 is large, the ambient sound acquired by the transmitter 11 includes the speech of the speaker, and the noise output unit 13 has a frequency close to the frequency of the speaker's voice. Can be expected to output noise. Further, when the noise around the mobile phone 1 is large, even when the frequency of the noise output from the noise output unit 13 is different from the voice of the speaker, this noise becomes a mask, and others around the speaker It can be expected that it is difficult to hear the utterance content of the speaker.

Note that the voice data analysis performed by the transmitted voice analysis unit 172 is not limited to detecting the frequency. For example, the transmission voice analysis unit 172 may detect the timing at which the voice acquired by the transmission unit 11 is uttered (timing when the speaker speaks). For example, the transmitted voice analysis unit 172 determines that a voice is being emitted when the voice data output from the transmission unit 11 indicates a volume equal to or higher than a predetermined threshold.
And the noise acquisition part 173 outputs the audio | voice data of noise to the noise output part 13 at the timing at which the audio | voice which the transmission part 11 acquires is emitted based on the analysis result of the transmission voice analysis part 172. The noise output unit 13 outputs noise when the audio data is output from the noise acquisition unit 173 according to the audio data output from the noise acquisition unit 173, and when the audio data is not output from the noise acquisition unit 173. By not outputting noise, noise is output at the timing when the voice acquired by the transmitter 11 is emitted. That is, when the transmitted voice analysis unit 172 determines that a voice is being emitted, the noise output unit 13 outputs noise. On the other hand, when the transmitted voice analysis unit 172 determines that no voice is being emitted, the noise output unit 13 does not output noise.

  Thereby, for example, in comparison with the case where the noise output unit 13 always outputs noise while a call is established, the time during which the noise output unit 13 outputs noise (noise output with respect to the time when the call is established) The ratio of the time during which the unit 13 outputs noise) can be reduced. Therefore, an increase in power consumption of the mobile phone 1 due to noise output can be suppressed.

Further, when the noise output unit 13 delays the utterance of the speaker (voice acquired by the transmission unit 11) for a predetermined time and outputs it as noise, the noise output unit 13 When noise is output, others around the speaker may hear the noise, and the content of the speaker's speech may be heard by the other person.
Therefore, the transmitted voice analysis unit 172 detects the timing at which the speaker speaks and outputs noise only at the timing at which the speaker speaks. Thereby, the noise output unit 13 outputs a voice (noise) in which the utterance of the speaker is delayed in a state where the speaker does not speak, and others around the speaker listen to the noise, It is possible to prevent the speech content of the speaker from being heard by the other person.

In addition, various things can be used as the noise which the noise output part 13 outputs at the timing at which the sound which the transmission part 11 acquires is emitted.
For example, as described above, it may be a voice obtained by delaying the utterance of the speaker for a certain time, or may be other noise such as white noise, pink noise, or red noise.

  Alternatively, the transmission voice analysis unit 172 may detect the frequency of the voice acquired by the transmission unit 11 as described above together with the timing at which the voice acquired by the transmission unit 11 is emitted. And the noise output part 13 outputs the audio | voice data of the noise of the frequency close | similar to the audio | voice which the transmission part 11 acquires at the timing when the audio | voice which the transmission part 11 acquires is uttered.

In this case, as described above, the noise acquisition unit 173 may acquire audio data of any noise from among a plurality of noise audio data provided in advance in the mobile phone 1, or obtain noise. The unit 173 may have voice data generation means to generate noise voice data having a frequency close to the frequency detected by the transmission voice analysis unit 172. Then, the noise output unit 13 outputs noise according to the audio data acquired by the noise acquisition unit 173.
As described above, the noise output unit 13 outputs the sound data of noise having a frequency close to the sound acquired by the transmitting unit 11 at the timing when the sound acquired by the transmitting unit 11 is emitted. An increase in power consumption of the mobile phone 1 can be further suppressed.

Alternatively, the transmission voice analysis unit 172 detects the volume of the voice acquired by the transmission unit 11, and the noise output unit 13 outputs noise based on the volume detected by the transmission voice analysis unit 172. Also good. For example, the noise output unit 13 outputs a louder noise as the volume of the voice acquired by the transmitter 11 is higher.
Thereby, it can suppress that the noise output part 13 outputs the noise of the loudness larger than necessary. Therefore, an increase in power consumption of the mobile phone 1 due to noise output can be suppressed.

Next, the operation of the mobile phone 1 will be described with reference to FIG.
FIG. 5 is a flowchart showing a procedure of processing performed by the mobile phone 1 during a call. The mobile phone 1 starts the process shown in FIG. 5 when a call is established at the time of outgoing call or incoming call and becomes ready for a call.
First, the control unit 17 determines whether or not the call ends (whether or not there is a call end event), such as a communication disconnecting operation by the user of the mobile phone 1 or reception of a signal indicating the end of the call from the other party's telephone ( Step S101).

  If it is determined that the call has ended (step S101: YES), the processing in FIG. Thereafter, the mobile phone 1 outputs a signal indicating the end of the call when receiving a communication disconnecting operation by the user of the mobile phone 1 itself, and displays a call end display when receiving a signal indicating the end of the call. Do time processing.

  On the other hand, when it is determined in step S101 that the call has not ended (step S101: NO), the mobile phone 1 performs a reception process (step S102). Specifically, the radio communication unit 16 receives the voice signal of the other party as a radio signal, converts it into voice data, and outputs it to the control unit 17. Then, the control unit 17 outputs the voice data of the communication partner output from the wireless communication unit 16 to the receiver unit 12.

In addition, the transmission voice analysis unit 172 analyzes voice data output by the transmission unit 11 by acquiring ambient sound (utterer's utterance), detects the frequency of the voice, and acquires the detected frequency as noise. The data is output to the unit 173 (step S103).
The noise acquisition unit 173 acquires noise audio data based on the frequency output from the transmitted voice analysis unit 172, and outputs the acquired audio data to the noise output unit 13 (step S104).

Then, the receiving unit 12 outputs the voice of the other party in accordance with the audio data output from the control unit 17 (step S105). In addition, the noise output unit 13 outputs noise according to the audio data output from the noise acquisition unit 173 (step S106).
In addition, the mobile phone 1 performs transmission processing (step S107). Specifically, the control unit 17 outputs the audio data acquired from the transmitter 11 in step S103 to the wireless communication unit 16, and the wireless communication unit 16 converts the audio data output from the control unit 17 into a radio signal. To send.
Then, it returns to step S101 and repeats the process of the figure.

As described above, the transmission voice analysis unit 172 analyzes the voice acquired by the transmission unit 11, and the noise output unit 13 outputs noise having a frequency similar to the voice acquired by the transmission unit 11, or Analysis of the transmission voice analysis unit 172 such as outputting noise at the timing when the voice acquired by the transmission unit 11 is emitted, or outputting noise of a volume corresponding to the volume of the voice acquired by the transmission unit 11 Outputs noise based on the result.
As a result, the noise volume can be made relatively low, or the time during which the noise output unit 13 outputs noise can be reduced, or the noise output unit 13 can output noise with a volume larger than necessary. Can be suppressed. Therefore, an increase in power consumption of the mobile phone 1 due to noise output can be suppressed.
That is, the speaker can speak at a relatively high volume without moving to a place where there is no other person, and the power consumption of the mobile phone 1 can be reduced.

<Second Embodiment>
FIG. 6 is an explanatory diagram showing a schematic configuration of a mobile phone according to the second embodiment of the present invention and noise sound output performed by the mobile phone. In the figure, a cellular phone 2 includes a transmitter (voice acquisition unit) 11, a receiver (second voice output unit) 12, a noise output unit (voice output unit) 13, a key operation unit 14, and a display. Unit 15, wireless communication unit (audio signal acquisition unit) 16, and control unit 27. The control unit 27 includes an audio processing unit 271. The voice processing unit 271 includes a transmitted voice analysis unit (speech analysis unit) 172, a noise acquisition unit 173, an antiphase acquisition unit 274, and a superposition unit 275.
In the figure, parts having the same functions corresponding to the respective parts in FIG. 1 are denoted by the same reference numerals (11 to 16, 172, 173), and description thereof is omitted.

  The control unit 27 analyzes the voice (speech P11 in FIG. 6) acquired by the transmission unit 11, and generates noise voice data in the same manner as the control unit 17 (FIG. 1). Further, the control unit 27 performs noise cancellation on the voice of the other party by superimposing the voice of the opposite party on the voice of the other party.

The reverse phase acquisition unit 274 acquires audio data (hereinafter referred to as “reverse phase data”) in which the noise (audio data) acquired by the noise acquisition unit 173 is in reverse phase.
Here, the antiphase acquisition unit 274 receives the output of the noise audio data acquired by the noise acquisition unit 173, and generates the audio data having the noise in an antiphase, thereby acquiring the antiphase data.

  Note that the method of acquiring the antiphase data by the antiphase acquisition unit 274 is not limited to the method of generating the antiphase data. For example, the mobile phone 1 may include a storage device, and the storage device may store noise audio data and antiphase data in which the noise has an opposite phase in advance. The noise acquisition unit 173 acquires noise sound data from the storage device, and the antiphase acquisition unit 274 reads out antiphase data from the storage device.

  The superimposing unit 275 generates audio data in which a plurality of audios are superimposed. In the present embodiment, the superimposing unit 275 superimposes the reverse phase data acquired by the reverse phase acquisition unit 274 on the voice data of the communication partner that is received and output by the wireless communication unit 16 (that is, the communication partner). Is generated by superimposing a voice with noise in an opposite phase to the voice of the voice) and output to the receiver 12.

In the mobile phone 2, the noise output unit 13 outputs the noise P13 as in the case of the mobile phone 1 (FIG. 1). On the other hand, the receiving unit 12 outputs a voice P22 obtained by superimposing a voice having the opposite phase of the noise P13 on the voice of the other party.
Then, the noise P13 output from the noise output unit 13 and the audio having the opposite phase of the noise P13 included in the audio P22 output from the receiver unit 12 cancel each other. As a result, the other party's voice P12 included in the voice output from the receiver 12 remains and is acquired (listened) by the user of the mobile phone 2.

  Thus, the antiphase data acquired by the antiphase acquisition unit 274 acts as a noise cancellation signal that cancels the noise output from the noise output unit 13.

Next, the operation of the mobile phone 2 will be described with reference to FIG.
FIG. 7 is a flowchart showing a procedure of processing performed by the mobile phone 2 during a call. The cellular phone 2 starts the process shown in FIG. 4 when a call is established at the time of outgoing call or incoming call and becomes ready for a call.

Step S201 is the same as step S101 in FIG.
In step S202, the mobile phone 1 performs reception processing. The reception process here is a part of the reception process in step S102 of FIG. 5 where the wireless communication unit 16 receives the voice signal of the other party as a radio signal, converts it into voice data, and outputs it to the control unit 27. It is.
Steps S203 to S204 are the same as steps S103 to S104 in FIG.

  In step S205, the antiphase acquisition unit 274 acquires antiphase data (audio data in which the noise acquired by the noise acquisition unit 173 in step S204 has an antiphase). Then, the superimposing unit 275 superimposes the reverse phase data acquired by the reverse phase acquiring unit 274 on the voice data of the communication partner that is received and output by the wireless communication unit 16 (that is, the voice data of the communication partner). , Data indicating a sound obtained by superimposing sound with noise in opposite phase), and outputting the generated data to the receiver unit 12. The reception unit 12 outputs a sound according to the sound data output from the superposition unit 275.

As described above, when this antiphase data is superimposed on the noise acquired by the noise acquisition unit 173 in step S204, the noise is canceled. That is, the antiphase data acts as a noise cancellation signal.
Steps S206 to S208 are the same as steps S105 to S107 in FIG.

  As described above, the superimposing unit 275 superimposes the voice having the opposite phase of the noise on the voice of the other party, and the receiving unit 12 outputs the voice. The voice having this noise in opposite phase and the voice output from the noise output unit 13 cancel each other, and the user of the mobile phone 2 acquires the voice of the other party that does not contain noise (or the noise volume is low). (Listen)

<Third Embodiment>
FIG. 8 is an explanatory diagram showing a schematic configuration of a mobile phone according to the third embodiment of the present invention and noise sound output performed by the mobile phone. In the figure, a cellular phone 3 includes a transmitter (voice acquisition unit) 11, a receiver (second voice output unit) 12, a noise output unit (voice output unit) 13, a key operation unit 14, and a display. Unit 15, wireless communication unit (audio signal acquisition unit) 16, and control unit 37. The control unit 37 includes an audio processing unit 371. The voice processing unit 371 includes a transmission voice analysis unit (speech analysis unit) 172, a noise acquisition unit 173, an antiphase acquisition unit 274, and a superposition unit (voice signal generation unit) 275.
In the figure, portions having the same functions corresponding to the respective portions in FIG. 6 are denoted by the same reference numerals (11 to 16, 172, 173, 274, 275), and description thereof is omitted.
The control unit 37 is different from the control unit 27 (FIG. 6) in that the voice processing unit 371 included in the control unit 37 performs noise cancellation on the voice acquired by the transmission unit 11.
In the present embodiment, the superimposing unit 275 superimposes the antiphase data acquired by the antiphase acquiring unit 274 on the audio data output by the transmitting unit 11 (that is, the noise is added to the speech of the speaker). Is generated) and is output to the wireless communication unit 16.

In the mobile phone 3, the noise output unit 13 outputs the noise P13 as in the case of the mobile phone 1 (FIG. 1). It is conceivable that this noise P13 is acquired by the transmitter 11 and becomes a noise for the speaker's utterance P11 for the other party.
Therefore, the superimposing unit 275 performs noise cancellation for superimposing the antiphase data on the audio data output from the transmitting unit 11.

Thereby, the superimposing unit 275 generates the utterance P11 (speech data indicating the utterance) of the speaker. Alternatively, the superimposing unit 275 generates audio data in which noise included in the audio acquired by the transmitting unit 11 is reduced.
And the wireless communication part 16 transmits the audio | voice data which the superimposition part 275 produced | generated wirelessly.

Next, the operation of the mobile phone 3 will be described with reference to FIG.
FIG. 9 is a flowchart showing a procedure of processing performed by the mobile phone 3 during a call. The mobile phone 3 starts the process shown in FIG. 5 when a call is established at the time of outgoing call or incoming call and becomes ready for a call.
Steps S301 to S306 are the same as steps S101 to S106 in FIG.

In step S307, the superimposing unit 275 superimposes the antiphase data on the audio data output from the transmitting unit 11.
Step S308 is the same as step S107 in FIG. That is, the control unit 37 (superposition unit 275) outputs the audio data generated in step S306 to the wireless communication unit 16, and the wireless communication unit 16 transmits the audio data output from the control unit 37 as a wireless signal. To do.

  As described above, the superimposing unit 275 performs noise cancellation for superimposing the antiphase data on the audio data output from the transmitting unit 11, so that the other party is the speaker's speech (or the speaker with reduced noise). Can be obtained (listened).

  Note that both the noise cancellation for the voice of the call partner described in the second embodiment and the noise cancellation for the speech of the speaker (user of the mobile phone 3) described in the third embodiment are described. May be performed.

<Fourth Embodiment>
Note that the scope of application of the present invention is not limited to the mobile phone described above. The present invention can be applied to various devices that acquire ambient sound.
FIG. 10 is a configuration diagram showing a schematic configuration of an audio output device according to the fourth embodiment of the present invention. In the figure, the audio output device 4 includes an audio acquisition unit 41, an audio processing unit 171, and a noise output unit (audio output unit) 13. The voice processing unit 171 includes a voice analysis unit 472 and a noise acquisition unit 173.

Similar to the transmitter 11 (FIG. 1), the voice acquisition unit 41 has a microphone, acquires ambient sounds, and converts them into voice data. In particular, the voice acquisition unit 41 acquires the utterance of the speaker (the user of the voice output device 4) and converts it into voice data.
The voice analysis unit 472 analyzes the voice data of the speaker generated by the voice acquisition unit 41 in the same manner as the transmitted voice analysis unit 172 (FIG. 1).
In addition, each unit of the audio output device 4 other than the audio acquisition unit 41 and the audio analysis unit 472 has the same function corresponding to each unit described in FIG. Therefore, the same reference numerals (13, 171 and 173) as those in FIG. 1 are attached to portions corresponding to the respective portions in FIG.

  The audio output device 4 can be applied to various devices such as a game machine, a tablet PC (Personal Computer), a notebook PC, and a PDA (Personal Digital Assistant) that acquire surrounding audio. Since these devices include the audio output device 4, the utterance content of the speaker can be hidden from others around the speaker as in the case of the mobile phone described above.

Note that a program for realizing all or part of the functions of the control units 17 to 371 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. You may process each part by. Here, the “computer system” includes an OS and hardware such as peripheral devices.
Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the gist of the present invention.

1 to 3 Mobile phone 11 Transmitter 12 Receiver 13 Noise output unit 14 Key operation unit 15 Display unit 16 Wireless communication unit 17 to 37 Control unit 171 to 371 Audio processing unit 172 Transmitted voice analysis unit 173 Noise acquisition unit 274 Reverse Phase acquisition unit 275 Superposition unit

Claims (8)

An audio acquisition unit for acquiring audio;
A voice analysis unit for analyzing the voice acquired by the voice acquisition unit;
Based on the analysis result of the voice analysis unit, a voice output unit that outputs a voice different from the voice acquired by the voice acquisition unit;
An audio output device comprising: The voice analysis unit detects a frequency of the voice acquired by the voice acquisition unit;
The voice output unit outputs voice acquired based on the frequency detected by the voice analysis unit.
An audio output device characterized by that. The voice analysis unit detects the timing at which the voice acquired by the voice acquisition unit is emitted,
The voice output unit outputs a voice different from the voice acquired by the voice acquisition unit at a timing when the voice acquired by the voice acquisition unit is emitted based on the detection result of the voice analysis unit.
The audio output device according to claim 1, wherein the audio output device is an audio output device. An audio signal acquisition unit for acquiring an audio signal;
An antiphase acquisition unit for acquiring an audio signal having an opposite phase to the audio output by the audio output unit;
A second sound output unit that outputs a sound obtained by superimposing the sound indicated by the sound signal acquired by the sound signal acquisition unit and the sound indicated by the sound signal acquired by the antiphase acquisition unit;
The audio output device according to any one of claims 1 to 3, further comprising: An antiphase acquisition unit for acquiring an audio signal having an opposite phase to the audio output by the audio output unit;
An audio signal generation unit that generates an audio signal indicating audio obtained by superimposing the audio acquired by the audio acquisition unit and the audio indicated by the audio signal acquired by the antiphase acquisition unit;
The audio output device according to any one of claims 1 to 3, further comprising: An audio signal generation unit that generates an audio signal indicating audio obtained by superimposing the audio acquired by the audio acquisition unit and the audio indicated by the audio signal acquired by the antiphase acquisition unit;
The audio output device according to claim 4, further comprising: An audio output method of an audio output device,
An audio acquisition step for acquiring audio;
A voice analysis step of analyzing the voice acquired in the voice acquisition step;
Based on the analysis result in the voice analysis step, a voice output step for outputting a voice different from the voice acquired in the voice acquisition step;
An audio output method comprising: To a computer as an audio output device,
An audio acquisition step for acquiring audio;
A voice analysis step of analyzing the voice acquired in the voice acquisition step;
Based on the analysis result in the voice analysis step, a voice output step for outputting a voice different from the voice acquired in the voice acquisition step;
A program for running

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