JPWO2007015319A1 - Audio output device, audio communication device, and audio output method - Google Patents

Abstract

Provided is a mobile phone terminal that makes a caller think that a call cannot be communicated without knowing the nationality of the telephone user in response to a malicious call that seeks to obtain personal information of the telephone call or the telephone user. The mobile phone terminal 100 analyzes the user's input voice 201 acquired by the microphone 61 and outputs the phoneme information 202, and the phoneme or syllable included in the phoneme information 202 is randomly replaced to output the voice. Voice output control means 3 for outputting as an instruction 302, voice output means 4 for outputting an output voice 402 based on the voice output instruction 302, signal switching means 7 for outputting the output voice 402 as a transmission signal 501; By providing the wireless communication means 5 for outputting the signal 501 to the wireless public network, the user's voice is converted into an unknown meaning voice to be heard by the caller.

Description

  The present invention relates to an apparatus that processes input voice and outputs the voice, and more particularly to a voice output apparatus that can be used as a means for preventing illegal or unauthorized calls such as mischievous telephone calls in telephone communications.

  In recent years, “transfer fraud”, which attempts to gain profits by fraudulently using people over the phone and transferring money to a designated account, has become a social problem. In addition, there is no end to the unscrupulous commercial law that attempts to sell expensive services and products that users do not want by using the telephone. In addition to malicious calls for the purpose of fraud and solicitation, call a random phone number and have the user speak to obtain personal information such as the nationality, gender and age of the user. It is also known that there are malicious calls trying to lead to fraud and solicitation.

  Conventionally, devices for repelling malicious calls such as mischievous telephones have been proposed. For example, there has been proposed a telephone device that converts the pitch period of a voice uttered by a user and listens to the other party. According to the present invention, even if a female user speaks, the other party can hear a male voice, so that the other party can think that the user is a male and stop the prank call (for example, Patent Document 1). reference).

There is also a known method of giving up a mischievous call by using the automatic answering function of an answering machine and letting the other party hear a standard message such as “I can't answer the call right now”.
JP 2000-78246 A (6th page, FIG. 1)

  However, in the above-mentioned conventional apparatus, the gender of the user is prevented from being known to the other party, but the user's nationality is determined because it is transmitted to the other party while maintaining the utterance content of the user. As a result, there is a problem that it is insufficient as a countermeasure against malicious calls to obtain personal information of users. In addition, there is a problem that a person aiming at fraud or solicitation learns that communication with the user is possible and continues or repeats malicious calls.

  In addition, in the case of the conventional method of letting the other party listen to a standard message, the other party can easily determine that the message is not due to the user's own utterance, so the other party does not give up until the user himself / herself answers the phone. There was a problem that the call was repeated many times.

  The present invention solves the above-described conventional problems, and makes the other party not aware of the nationality of the user and makes the other party think that communication with the user is impossible. An object of the present invention is to provide a voice communication apparatus capable of suppressing calls.

  In order to solve the above-described conventional problems, a speech output device according to the present invention includes speech analysis means for extracting phonological information from input speech, speech output control means for instructing speech output based on phonological information, and speech output control. Random phoneme speech is output based on phoneme information of the input speech using speech output means for outputting speech based on the instructions of the means.

  With the above configuration, voice that does not make sense for the listener based on the input voice can be output, so communication with the user is impossible without the other party knowing the nationality of the user. Can be thought of.

  In the speech output device of the present invention, the phoneme information includes information for identifying a phoneme or syllable included in the input speech, and the speech output control means configures the output speech by replacing the phoneme or syllable according to a predetermined rule. Determine phonemes or syllables to play.

  With the above-described configuration, a voice in which the phoneme or syllable of the input voice is replaced with another phoneme or syllable is output, so that a voice that does not make sense for the listener can be output. For this reason, it is possible to make it impossible to communicate with the user without knowing the nationality of the user.

  In the sound output device of the present invention, the phoneme information includes information indicating whether the input sound is sounded, and the sound output control means instructs sound output based on the information indicating whether sound is sounded.

  With the above configuration, since the start and stop of voice output can be controlled depending on whether or not the input voice is voiced, voice output that matches the utterance timing of the user or the other party can be performed. For this reason, it is possible to make it seem that communication with the user is impossible without giving the other party the room for suspicion that the output voice is a standard message or synthesized voice.

  In the speech output device of the present invention, the phoneme information includes information indicating the fundamental frequency of the input speech, and the speech output control means determines the fundamental frequency of the output speech based on the fundamental frequency information.

  With the above configuration, the change in the fundamental frequency of the output voice has fluctuations having the same characteristics as the change in the fundamental frequency of the input voice, and the naturalness of the output voice is increased. For this reason, it is possible to make it seem that communication with the user is impossible without giving the other party the room for suspicion that the output voice is a standard message or synthesized voice.

  The present invention also constitutes a voice communication device further comprising a communication means for executing communication processing and outputting output voice to a communication destination.

  With the above configuration, a voice communication device is provided that can prevent another malicious call by making the other party not know the nationality of the user and making it impossible to communicate with the user. be able to.

  The speech output method of the present invention includes a first step of extracting phonological information from an input speech, a second step of instructing output of an output speech composed of random phonemes based on the phonological information, And a third step of outputting the output sound based on the instruction.

  By the above method, voice that does not make sense for the listener can be output based on the input voice, so it is impossible to communicate with the user without knowing the nationality of the user. It can be reminiscent.

  According to the present invention, by generating random phonological information based on the phonological information of the input speech and outputting the speech, the other party who made the malicious call is not aware of the nationality of the user, It is possible to make it seem that communication with the person is impossible, and it is possible to suppress malicious calls again.

1 is a schematic configuration diagram of an audio output device according to Embodiment 1 of the present invention. Configuration diagram of mobile phone terminal according to Embodiment 1 of the present invention External view of mobile phone terminal according to Embodiment 1 of the present invention The figure explaining the content of the phoneme replacement candidate table which the audio | voice output control means of the mobile telephone terminal in Embodiment 1 of this invention hold | maintains The flowchart which shows the process sequence of the audio | voice output control means of the mobile telephone terminal in Embodiment 1 of this invention. The figure explaining operation | movement of the mobile telephone terminal in Embodiment 1 of this invention Configuration diagram of mobile phone terminal according to Embodiment 2 of the present invention The figure explaining the content of the syllable string table which the audio | voice output means of the mobile telephone terminal in Embodiment 2 of this invention hold | maintains First flowchart showing the processing procedure of the voice output control means of the mobile phone terminal according to the second embodiment of the present invention. Second flowchart showing the processing procedure of the voice output control means of the mobile phone terminal according to the second embodiment of the present invention. Third flowchart showing the processing procedure of the voice output control means of the mobile phone terminal according to the second embodiment of the present invention. The figure explaining 1st operation | movement of the mobile telephone terminal in Embodiment 2 of this invention The figure explaining 2nd operation | movement of the mobile telephone terminal in Embodiment 2 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Audio | voice output apparatus 2 Audio | voice analysis means 3 Audio | voice output control means 4 Audio | voice output means 5 Wireless communication means 7 Signal switching means 41 Fixed syllable holding means 61 Microphone 62 Speaker 91 Signal switching button 92 On-hook button 93 Off-hook button 100,200 201 Input voice 202 Phoneme information 302 Voice output instruction 304 On-hook signal 402 Output voice 501 Transmission signal 502 Reception signal 612 Microphone output signal

  The best mode for carrying out the present invention will be described below with reference to the drawings. Note that in all the drawings for explaining the embodiments, the same reference numerals are given to the same components, and duplicate explanations are omitted.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of an audio output device 1 according to Embodiment 1 of the present invention. In FIG. 1, the audio output device 1 includes an audio analysis unit 2, an audio output control unit 3, and an audio output unit 4.

  The voice analysis unit 2 receives the input voice 201 and executes a voice analysis process, extracts phonological information of the input voice 201 and outputs phonological information 202. Note that “phonological information” described in this specification refers to phonological information of speech obtained as a result of speech analysis. For example, this specification includes symbols and symbol strings for identifying phonemes and syllables constituting speech, information indicating the strength and height of speech, information on fundamental frequencies, and information for distinguishing whether sound is present or not. It corresponds to "phoneme information".

  The sound output control means 3 receives the phoneme information 202 and outputs a sound output instruction 302 that instructs the output of the output sound 402. The audio output unit 4 outputs an output audio 402 based on the audio output instruction 302. Here, the voice output control means 3 outputs a voice output instruction 302 based on the phoneme information 202 so that the output voice 402 is composed of random phonemes.

  The voice analysis processing in the voice analysis means 2 may use a known voice analysis device or voice analysis method, and therefore detailed description thereof will be omitted in this specification. The voice output process in the voice output means 4 may use a known voice synthesizer or voice synthesizer, and therefore detailed description thereof will be omitted in this specification.

  FIG. 2 is a configuration diagram when the audio output device 1 according to Embodiment 1 of the present invention is configured as the mobile phone terminal 100. 2, the mobile phone terminal 100 includes a wireless communication unit 5, a microphone 61, a speaker 62, a signal switching unit 7, a signal switching button 91, an on-hook button 92, and an off-hook button 93 in addition to the components described in FIG.

  The voice analysis means 2 receives the input voice 201 and executes voice analysis processing, calculates the short-term average power of the input voice 201, and determines whether the received input voice 201 is a voiced section or a silent section. The signal “ON” is output as phoneme information 202 when there is sound and the signal “OFF” is output when there is no sound. The voice analysis unit 2 identifies phonemes by performing cepstrum analysis or the like on the input voice 201 and outputs phoneme symbols (for example, / p /, / a /) as phoneme information 202. Furthermore, the voice analysis means 2 outputs the fundamental frequency information representing the fundamental frequency every 30 milliseconds of the input voice 201 as the phoneme information 202.

  The voice output control means 3 determines the phoneme to be included in the output voice 402 and the fundamental frequency of the output voice 402 based on the phoneme symbol and the fundamental frequency information included in the phoneme information 202, and outputs it as the voice output instruction 302.

  The voice output unit 4 synthesizes and outputs the output voice 402 based on the phoneme and the fundamental frequency indicated by the voice output instruction 302. The audio output means 4 performs the articulation coupling process when the phoneme transitions, the interpolation process of the fundamental frequency change, and the like so that the output sound 402 does not become unnatural as a sound.

  The wireless communication means 5 is a part that connects the mobile phone terminal 100 to a wireless public network (not shown) and executes communication processing. The wireless communication means 5 outputs the transmission signal 501 to the wireless public network. Further, the wireless communication means 5 outputs the reception signal 502 acquired from the wireless public network to the speaker 62. The wireless communication means 5 starts outputting the transmission signal 501 to the wireless public network and acquiring the reception signal 502 from the wireless public network based on the operation of the off-hook button 93. The wireless communication means 5 ends the connection with the wireless public network based on the operation of the on-hook button 92.

  The microphone 61 converts the user's voice into an electrical signal and outputs a microphone output signal 612. The speaker 62 converts the received signal 502 into air vibration and emits sound. The signal switching means 7 is a means for switching and outputting two types of signals. By operating the signal switching button 91, the output sound 402 is output as the transmission signal 501 or the microphone output signal 612 is output as the transmission signal 501. Can be switched. In other words, the signal switching button 91 indicates which of the output voice 402 processed for the user's voice and the microphone output signal 612 that is not processed is output to the wireless public network to be heard by the other party. It is configured so that the user can select by the operation. The signal switching unit 7 outputs the output voice 402 as the transmission signal 501 in the initial state of the communication process by the wireless communication unit 5. This prevents inconvenience that the other party's personal information is heard by the other party because the other party's voice is heard without knowing that the other party is malicious. Can do.

  FIG. 3 is a diagram showing an appearance of the mobile phone terminal 100 according to the embodiment of the present invention. The signal switching button 91 is arranged on the side surface of the lower part of the casing so that the user can operate it without looking at his / her hand during a call.

  FIG. 4 is a diagram showing the contents of the phoneme replacement candidate table T31 held by the audio output control means 3 of the mobile phone terminal 100 according to Embodiment 1 of the present invention. The phoneme replacement candidate table T31 is a table showing another phoneme candidate for replacing a phoneme included in the phoneme information 202. Each record R311 to R318 of the phoneme replacement candidate table T31 includes a first field F311 representing a phoneme p constituting the phoneme information 202, and a second field F312 representing a candidate of another phoneme p ′ that replaces the phoneme p. Become. The speech output control means 3 generates a speech output instruction 302 by replacing the phoneme p constituting the phoneme information 202 with the phoneme p ′ according to a predetermined rule (hereinafter referred to as phoneme replacement rule) based on the phoneme replacement candidate table T31. That is, the speech output control means 3 searches the record R311 to R318 for a record including the phoneme p in the first field (F311) in the phoneme replacement candidate table T31, and the second field (F312) of the corresponding record indicates it. The phoneme p ′ is randomly selected from the phoneme p ′ candidates, and the phoneme p ′ is replaced with the phoneme p ′.

  FIG. 5 is a flowchart showing the processing procedure of audio output control means 3 of mobile phone terminal 100 according to Embodiment 1 of the present invention. The voice output control means 3 first acquires the phoneme information 202 (step S101), and the input voice 201 is voiced based on whether the signal included in the phoneme information 202 is “ON” or “OFF”. It is determined whether it is a section (step S102). If it is a voiced section (YES), the audio output control means 3 proceeds to step S103, and if it is a silent section (NO), the process proceeds to step S101.

  In step S103, the speech output control means 3 determines whether or not the phoneme included in the phoneme information 202 acquired this time is the same as the phoneme included in the phoneme information 202 acquired last time (NO), and proceeds to step S105. If they are different (YES), the process proceeds to step S104.

  In step S104, the voice output control unit 3 replaces the phoneme p constituting the phoneme information 202 with a new phoneme p 'in accordance with the phoneme replacement rule to obtain a voice output instruction 302. On the other hand, in step S105, the voice output control unit 3 replaces the phoneme p constituting the phoneme information 202 with the phoneme p 'obtained in the previous step S104 to obtain a voice output instruction 302. The determination in step S103 and the processing in step S105 are for converting a section in which the same phoneme in the input speech 201 is continued into a section in which another same phoneme is continued.

  In step S <b> 106, the voice output control unit 3 calculates the fundamental frequency F <b> 0 ′ according to the frequency conversion formula based on the fundamental frequency F <b> 0 indicated by the fundamental frequency information included in the phoneme information 202, and sets it as the voice output instruction 302. The frequency conversion formula is as follows.

F0 ′ = F0 * r * (random number (0.4) +0.8)
Here, r is a predetermined coefficient for instructing how much the fundamental frequency of the output speech 402 is to be higher than the fundamental frequency of the input speech 201. The coefficient r is set to r <1, so that the fundamental frequency of the output sound 402 can be made lower than the fundamental frequency of the input sound 201 as a whole. For example, if r = 0.5, the female voice of the input voice 201 is converted like a male voice and output as the output voice 402, thus preventing the calling party from knowing the gender of the user. it can. The coefficient r may be changed by a user operation. The random number (0.4) represents a random number less than 0.4. By giving fluctuations to the fundamental frequency with a random number or the like, the change in intonation of the input voice 402 can be disturbed, and the other party can recognize the language of the input voice 201 from the intonation of the output voice 402. Is preventing.

  In step S107, the audio output control unit 3 outputs the audio output instruction 302 generated by the processing up to step S106 to the audio output unit 4, and the process returns to step S101.

  The specific operation of Embodiment 1 of the present invention will be described below. In other words, this is a specific example in which the user's voice is processed and output to the wireless public network, and is then heard by the other party. Here, a case where the user is a woman whose native language is Japanese and the coefficient r is 0.5 will be described as an example.

  FIG. 6 is a diagram showing the contents of the input voice 201 and the output voice 402 when the user utters the voice “Where?” During a call in the mobile phone terminal 100 according to Embodiment 1 of the present invention. In FIG. 6, the horizontal axis represents time, and the vertical axis represents the fundamental frequency. A line group L101 represents a change in the fundamental frequency of the input sound 201, and a line group L102 represents a change in the fundamental frequency of the output sound 402. The phoneme symbols described immediately above the line group L101 and the line group L102 are the phonemes (D101 to D106) included in the phoneme information 202 and the phonemes (D111 to D116) indicated by the voice output instruction 302, respectively. Show. Hereinafter, the operation of the mobile phone terminal 100 according to the first embodiment of the present invention will be described with reference to FIG.

  First, when the user starts a call, the voice analysis unit 2 analyzes the input voice 201 and extracts the phoneme information 202 at time t101. The phoneme information 202 includes phoneme / d / (D101) and fundamental frequency F0 information, and a signal “ON” indicating a voiced section.

  Next, the audio output control means 3 executes processing according to the procedure shown in the flowchart of FIG. In step S <b> 101, the audio output control unit 3 acquires phonological information 202. In step S102, the sound output control means 3 is a sound section ("ON") (YES), so the process proceeds to step S103. In step S103, the voice output control means 3 has newly accepted the phoneme / d /, so the determination is “YES”, and the flow proceeds to step S104.

  In step S104, the speech output control means 3 refers to the phoneme replacement candidate table T31 in FIG. 4 and selects a phoneme p 'for replacing the phoneme / d / according to the phoneme replacement rule. At this time, since the record having the phoneme / d / as the first field in the phoneme replacement candidate table T31 is the record R313, the voice output control means 3 randomly selects from the phonemes / k / or / g /. A phoneme is defined as a phoneme p ′. Here, it is assumed that / k / is selected as the phoneme p '.

  In step S106 of FIG. 5, the audio output control means 3 calculates the basic frequency F0 ′ according to the frequency conversion equation. In step 107, the audio output control means 3 uses the phoneme / k / and the basic frequency F0 ′ as the audio output instruction 302. Output.

  Further, the voice output unit 4 synthesizes and outputs the output voice 402 based on the voice output instruction 302. As shown in FIG. 6, the output sound 402 is a sound composed of phonemes / k / (D111), and the fundamental frequency is about half of the fundamental frequency of the input sound 201.

  By performing the same process on the phoneme / o / (D102) portion of the input speech 201, the output speech 402 composed of the phoneme / i / (D112) is output from the speech output means 4. The output voice 402 is sent to the wireless communication means 5 as the transmission signal 501 through the signal switching means, and is further outputted to the terminal of the other party through the wireless public network.

  Since the next phoneme / ch / (D103) is an unvoiced consonant, the speech analysis means 2 cannot extract the fundamental frequency and outputs 0 as the value of the fundamental frequency F0 in the phoneme information 202. The voice output control means 3 outputs 0 as the value of the fundamental frequency F0 ′ in the process of step S106, but the voice output means 4 accepts the fundamental frequency of the phoneme / i / (D112) accepted last time and the next accepted frequency. The basic frequency of the phoneme / a / (D114) is interpolated to change the basic frequency of the output speech 402 corresponding to the phoneme / r / (D113) smoothly.

  Further, the fundamental frequency of the phoneme / i / (D115) of the output speech 402 corresponding to the phoneme / a / (D105) of the input speech 201 is the previous phoneme due to the influence of random numbers in the frequency conversion formula of step S106 in FIG. It is slightly higher than the fundamental frequency of / n /.

  Thereafter, by repeating the same processing, the Japanese input voice 201 “Whisama?” Is converted into a male voice “Kirani Johi?” That does not make sense as Japanese, and is transmitted via a wireless public network. It is output from the other party's terminal.

  As described above, in the mobile phone terminal 100 according to Embodiment 1 of the present invention, as a first step, the speech analysis means 2 extracts phonological information from the input speech 201 and outputs the phonological information 202. As a step, the voice output control means 3 executes processing in the procedure shown in the flowchart of FIG. 5 to output a voice output instruction 302 based on the phonological information 202. As a third step, the voice output means 4 outputs a voice output instruction 302. The output voice 402 is synthesized and output based on the above. By this voice output method, random voice in which the phoneme of the input voice is replaced with another phoneme can be output to the terminal of the other party.

  As is clear from the above description, the mobile phone terminal according to Embodiment 1 of the present invention outputs a voice in which the phoneme of the input voice is replaced with another phoneme to the other party's terminal. Therefore, it is possible to make the call partner feel that communication with the user is impossible without knowing the nationality of the user.

  In addition, the mobile phone terminal according to Embodiment 1 of the present invention has fluctuations in which the change in the fundamental frequency of the output voice has a statistically similar property to the change in the fundamental frequency of the input voice. As a result, it is possible to make the call partner surely think that it is impossible to communicate with the user without giving the call partner room to suspect that the output voice is a standard message or a synthesized voice.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. The second embodiment is characterized in that the received signal that is the output of the wireless communication means 5 is used as the input voice.

  FIG. 7 is a configuration diagram of the mobile phone terminal 200 according to Embodiment 2 of the present invention. In FIG. 7, the mobile phone terminal 200 includes a voice analysis unit 2, a voice output control unit 3, a voice output unit 4, a fixed syllable holding unit 41, a wireless communication unit 5, a microphone 61, a speaker 62, a signal switching unit 7, and a signal switching button. 91, an on-hook button 92, and an off-hook button 93. Here, the fixed syllable holding means 41 is a means for holding a fixed syllable string for constituting the output sound 402.

  The voice analysis unit 2 accepts the received signal 502 that is the output of the wireless communication unit 5 as the input voice 201, executes voice analysis processing, calculates the short-term average power of the input voice 201, and the received input voice 201 is It is determined whether it is a voiced section or a silent section, and a signal “ON” is output as phoneme information 202 when there is a voice and a signal “OFF” is output when there is no sound.

  The voice output control unit 3 generates a syllable string ID for identifying a syllable string to be output as the output voice 402 based on the phonological information 202, and outputs the syllable string ID as a voice output instruction 302. The audio output control unit 3 outputs an on-hook signal 304 that is an instruction for the wireless communication unit 5 to end the connection with the wireless public network.

  The voice output means 4 synthesizes and outputs the output voice 402 based on the syllable string data acquired from the fixed syllable holding means 41 based on the syllable string ID included in the voice output instruction 302. The fixed syllable holding means 41 holds a syllable string table which is a table for obtaining syllable string data based on the syllable string ID.

  FIG. 8 is a diagram showing the contents of the syllable string table T41 held by the fixed syllable holding means 41 of the mobile phone terminal 200 according to Embodiment 2 of the present invention. Each record R411 to R414 of the syllable string table T41 includes a first field F411 representing a syllable string ID and a second field F412 representing syllable string data corresponding to the syllable string ID. The syllable string data is represented by a string of pairs of syllables (alphabetic characters enclosed in parentheses []) to be output as the output speech 402 and coefficients of fundamental frequencies of syllables (numeric values enclosed in parentheses ()). Yes. For example, the syllable string data “[ho] (1.0), [la] (1.2)” corresponding to the syllable string ID = 1 stored in the record R411 includes the syllable [ho] and the syllable [la]. Are continuously output at a medium fundamental frequency and a higher fundamental frequency.

  Further, in FIG. 8, the syllable string data corresponding to the syllable string ID = 1 in the record R411 is made to make the caller feel as if it is a fixed phrase (for example, “Hello”) uttered as a greeting immediately after the start of the call. It is data of. Further, the syllable string data corresponding to the syllable string ID = 2 in the record R412 is data for making the calling party feel as if it is a fixed phrase (for example, “Yes?”) Uttered when asking the calling party. It is. The syllable string data is intended to generate speech that does not make sense to the other party, but prepares syllable string data in advance to make the other party think as if it is some fixed phrase. Occasionally, by making it appear in the output voice 402, naturalness as a natural language is born in the output voice 402, and it is possible to make the other party believe that the output voice 402 is due to the voice of the user himself / herself. it can.

  9 to 11 are flowcharts showing the processing procedure of the audio output control means 3 of the mobile phone terminal 200 according to Embodiment 2 of the present invention. The voice output control means 3 first acquires the phoneme information 202 in step S211, and the input voice 201 is determined based on whether the signal included in the phoneme information 202 is "ON" or "OFF" in step S212. Judge whether it is a voiced section. If it is a voiced section (YES), the audio output control means 3 proceeds to step S221 in FIG. 10, and if it is a silent section (NO), the process proceeds to step S213.

  In step S213, the audio output control unit 3 determines whether the audio output unit 4 is outputting the output audio 402. If the audio output unit 4 is outputting (YES), the process returns to step S211. If not output (NO). Proceed to step S214. In step S214, the voice output control means 3 determines whether or not the silent section of the input voice 201 is the first silent section after the start of the call, that is, immediately after the start of the call. If it is the first silent section (YES) The process proceeds to step S231 in FIG. 11, otherwise (NO), the process proceeds to step S215.

  In step 215, the audio output control means 3 generates a pseudo random number d of 0 or more and less than 1, and branches the process depending on the value. If d is less than 0.2, the process proceeds to step S216. If d is not less than 0.2 and less than 0.9, the process proceeds to step S217. If d is not less than 0.9, the process proceeds to step S219.

  In step S216, the voice output control means 3 selects to output a syllable string ID = 2, that is, to output a syllable string that asks the other party. In step S217, the audio output control means 3 randomly selects a syllable string ID from the syllable string ID or the syllable string ID = 0 stored in the syllable string table T41 of FIG. The syllable string ID = 0 indicates that the output sound 402 of the sound output means 4 is stopped. In step S218, the audio output control means 3 outputs the syllable string ID selected in step S216 or S217 as the audio output instruction 302, and returns to step S211.

  In step S219, the audio output control means 3 outputs the on-hook signal 304, whereby the wireless communication means 5 ends the connection with the wireless public network. In this way, by executing the process of probabilistically disconnecting the call, the user can understand the meaning of the other party's utterance and decide that it is useless to continue the call, so that the call is performed as if an on-hook operation was performed. You can make your opponent think. In addition, since the voice output control means 3 automatically instructs to disconnect the call after a while from the start of the call, it is not necessary for the user himself to operate the on-hook button 92 while listening to the voice of the other party with malicious intent. , Improve convenience.

  Steps S221 to S229 in FIG. 10 are processing procedures of the voice output control means 3 when the input voice 201 is in a voiced section in step S212 in FIG. 9, that is, when the other party is making a voice. In step S221, the audio output control means 3 generates a pseudo-random number d that is greater than or equal to 0 and less than 1, and branches the process depending on the value. When d is less than 0.998, the process proceeds to step S222, and when d is 0.998 or more, the process proceeds to step S229.

  In step S222, the audio output control means 3 sets syllable string ID = 0, outputs an audio output instruction 302 in step S223, and returns to step S211. Steps S <b> 222 to S <b> 223 are processes for making the calling party think as if the user interrupted the speaking because the calling party started speaking while the user was speaking. Through the processing of steps S222 to S223, it is possible to make the other party believe that the user is speaking while listening to the voice of the other party.

  In step S229, when the audio output control means 3 outputs the on-hook signal 304, the wireless communication means 5 ends the connection with the wireless public network.

  Steps S231 to S239 in FIG. 11 are the processing procedures of the voice output control means 3 immediately after the start of the call, that is, when it is determined in step S214 in FIG. 9 that the silence period of the input voice 201 is the first silence period after the start of the call. It is. In step S231, the audio output control means 3 determines whether or not the two outputs of the syllable string ID have already been completed. If not completed (NO), the process proceeds to step S232, and if completed, (YES) step. Proceeding to S239, the on-hook signal 304 is output.

  In step S232, the voice output control means 3 selects to output a syllable string ID = 1, that is, to output a syllable string such as a greeting immediately after the start of a call. In step S233, the voice output instruction 302 is output, and step S211 of FIG. Return to. Steps S <b> 231 to S <b> 239 are processes for making the caller feel as if the call is disconnected because the user greets immediately after the start of the call and there is no response from the caller even after greeting twice.

  When the audio output control unit 3 outputs the audio output instruction 302 in steps S218, S223, and S233, the audio output unit 4 accepts it and outputs the output audio 402 in the following procedure. First, the voice output means 4 obtains syllable string data corresponding to the syllable string ID included in the voice output instruction 302 by searching the syllable string table T41 (FIG. 8). Next, the voice output means 4 synthesizes and outputs the output voice 402 based on the syllable string data. At this time, the sound output means 4 calculates the fundamental frequency F0 'of the output sound 402 for each syllable according to the frequency calculation formula based on the coefficient α of the fundamental frequency indicated by the syllable string data. The frequency calculation formula is as follows.

F0 ′ = F0base * α * (random number (0.4) +0.8)
Here, F0base is an initial value of the fundamental frequency of the output sound 402. By adjusting the value of F0base, the output sound 402 can be made into a male voice or a female voice. For example, if F0base = 120 Hz, the output voice 402 can be a male voice. The value of F0base may be changed by a user operation. The random number (0.4) represents a random number less than 0.4. By multiplying the fundamental frequency by a random number, a variation can be given to the intonation change of the output voice 402, thereby preventing the other party from realizing that the output voice 402 is due to synthesis. The voice output means 4 performs a process of interpolating the fundamental frequency of the preceding and following syllables at the syllable boundary so that the output voice 402 does not become unnatural as a voice. The specific operation of Embodiment 2 of the present invention will be described below. That is, in the second embodiment, the synthesized voice based on the result of analyzing the voice of the other party as an input voice is output to the wireless public network as the output voice, and the other party is told. Hereinafter, a case where the other party makes a silent call will be described.

  FIG. 12 is a diagram showing the contents of output audio 402 in mobile phone terminal 200 according to Embodiment 2 of the present invention. In FIG. 12, the horizontal axis represents time, and the vertical axis represents the fundamental frequency. Syllable symbols D211 to D214 represent syllables included in the output speech 402. Hereinafter, the operation of the mobile phone terminal 200 according to Embodiment 2 of the present invention will be described with reference to FIG.

  First, when a user starts a call by operating the off-hook button 93 at time t201 when an incoming call is received, the voice analysis means 2 analyzes the input voice 201 and extracts phoneme information 202. The extracted phoneme information 202 includes a signal “OFF” indicating silence.

  Next, the audio output control means 3 executes processing in the procedure shown in the flowcharts of FIGS. In step S <b> 211, the audio output control unit 3 acquires phonological information 202. In step S212, the audio output control means 3 is a silent section (“OFF”) (NO), so the process proceeds to step S213. In step S213, the audio output control means 3 does not output the output audio 402 (NO), so the process proceeds to step S214. In step S214, since the voice output control means 3 is the first silent section after the start of the call (YES), the process proceeds to step S231 in FIG.

  In step S231, since the audio output control means 3 has not output the output audio 402 even once (NO), the process proceeds to step S232. In step S232, the audio output control means 3 sets the syllable string ID to 1, and outputs an audio output instruction 302 in step 233.

  Furthermore, the voice output unit 4 receives the voice output instruction 302, and refers to the syllable string table T41, and the syllable string data “[ho] (1.0), [la] (1.2” corresponding to the syllable string ID = 1. ”” (The second field F412 of the record R411 in FIG. 8) is obtained and the output sound 402 (D211 and D212 in FIG. 12) is synthesized. Here, the coefficient α of the syllable string data is set so that the fundamental frequency of the syllable [la] is higher, with the syllable [ho] being 1.0 and the [la] being 1.2. The fundamental frequency of 402 is higher for syllable [ho] (D211) than for syllable [la] (D212). This is because the fundamental frequency of the output sound 402 is fluctuated by the random number term in the frequency calculation formula.

  Thereafter, the second output of the output sound 402 is performed by the same processing (parts D213 and D214 in FIG. 12). Since the audio output control means 3 has already been output twice in the third process of step S231 (YES), the process proceeds to step S239, and the on-hook signal 304 is output, so that the wireless communication means 5 is wireless at time t202 in FIG. Close the connection with the public network.

  As described above, the mobile phone terminal according to the second embodiment of the present invention has a voice for making the other party feel like a fixed phrase that is uttered as a greeting when the other party makes a silent call. Is output a predetermined number of times, and then the connection with the public network is automatically terminated.

  As another specific operation of the second embodiment of the present invention, a case where a malicious call for the purpose of fictitious billing is received will be described as an example.

  FIG. 13 is a diagram showing the contents of the input voice 201 and the output voice 402 in the mobile phone terminal 200 in the mobile phone 2 of the present embodiment. In FIG. 13, the horizontal axis represents time. FIG. 13A, FIG. 13B, and FIG. 13C show the continuous operation divided into three for convenience. In FIG. 13, texts D301 to D305 represent the input voice 201, that is, the contents of the voice of the other party, and texts D311 to D315 represent the contents of the output voice 402. In FIG. 13, information on the fundamental frequencies of the input sound 201 and the output sound 402 is omitted. Hereinafter, the operation of the mobile phone terminal 200 according to the second embodiment will be described with reference to FIG. The process from when the user operates the off-hook button 93 at time t301 to the time when the first output sound 402 (D311) is output is the same as the process in the above-described operation example according to the second embodiment of the present invention. Since it is the same, description is abbreviate | omitted.

  When the voice D301 is input, the voice analysis unit 2 analyzes the input voice 201 and extracts phonological information 202. The extracted phoneme information 202 includes a signal “ON” indicating sound.

  Next, the audio output control means 3 executes processing in the procedure shown in the flowcharts of FIGS. In step S <b> 211, the audio output control unit 3 acquires phonological information 202. In step S212, since the sound output control means 3 is a sound section (“ON”) (YES), the process proceeds to step S221 in FIG.

  In step S221, the audio output control means 3 generates a pseudo random number d. Here, if d = 0.2, since d <0.998, the process proceeds to step S222, and the syllable string ID = 0. This is output as an audio output instruction 302 in step S223. The voice output unit 4 receives the voice output instruction 302 but does not output the output voice 402 because the syllable string ID = 0.

  While the input sound 201 is being input, the above process is repeated, so that the output sound 402 is not output.

  When the voice D301 ends, the voice analysis means 2 outputs phonological information 202 including a signal “OFF” indicating silence. The voice output control means 3 acquires the phoneme information 202 (step S211), and proceeds to step S213 based on the determination (NO) in step S212, and further proceeds to step S214 because the voice is not being output. In step S214, the audio output control means 3 is not the first silent section (NO), so the process proceeds to step S215.

  If the value of the pseudo random number d generated by the audio output control means 3 in step S215 is 0.3 here, since 0.2 ≦ d <0.9, the process proceeds to step S217. In step S217, the voice output control means 3 randomly selects a syllable string ID. Here, if ID = 3, the voice output control means 3 outputs a voice output instruction 302 including the syllable string ID = 3 in step S218. Output.

  The voice output means 4 accepts the voice output instruction 302 and refers to the syllable string table T41 to obtain syllable string data [[ki] (1.0), [ru] (0.9), [mi] (0.9). , [Ji] (1.2), [hi] (1.1), [go] (1.0), [che] (1.3), [si] (1.5) ”(in FIG. The second field F412) of the record R413 is obtained, and the sound D312 (FIG. 13) is output as the output sound 402.

  The voice D313 “chegi?” Is used when the value of the pseudo random number d generated by the voice output control means 3 in step S215 is smaller than 0.2 and becomes syllable string ID = 2 in step S216, or in step S217. This is an output when 2 is selected as the ID.

  If the other party starts speaking at time t302 while the voice D314 is being output, the voice output control means 3 proceeds to the process of FIG. 10 by the determination (YES) in step S212. Here, if the pseudo-random number d generated by the audio output control means 3 in step S221 is 0.7, since d <0.998, the audio output control means 3 executes the processing of steps S222 and S223, The output means 4 interrupts the output of the output sound 402 at time t303 in FIG.

  If the value of the pseudo random number d generated by the audio output control means 3 in step S221 while the audio D305 is being input is 0.9984 here, since d ≧ 0.998, the audio output control means 3 outputs an on-hook signal 304 in step S229, whereby the wireless communication means 5 terminates the connection with the wireless public network at time t304.

  As described above, the mobile phone terminal according to Embodiment 2 of the present invention makes it appear that the user is having a conversation by outputting a voice that does not make sense to the other party in the middle of the other party's voice. After that, the call is automatically disconnected.

  As is clear from the above description, since the mobile phone terminal according to Embodiment 2 of the present invention outputs a syllable string to the call partner's terminal at random, it may output a voice that does not make sense to the call partner. Therefore, it is possible to make the call partner think that communication with the user is impossible without knowing the nationality of the user.

  In addition, since the mobile phone terminal according to Embodiment 2 of the present invention can change the output of the voice based on whether or not the voice of the other party is voiced, it can output the voice according to the utterance situation of the other party. Therefore, it is possible to make the other party think that it is impossible to communicate with the user without giving the other party the room to suspect that the output voice is a standard message or synthesized voice.

  In addition, since the mobile phone terminal according to the second embodiment of the present invention outputs a standard voice from time to time, the naturalness of the output voice increases, so that there is no doubt that the output voice is a standard message or synthesized voice. It is possible to surely make the other party think that communication with the user is impossible.

  In addition, since the mobile phone terminal according to Embodiment 2 of the present invention stops the voice output when the other party starts speaking during the voice output, the user actually speaks while listening to the voice of the other party. Since it is possible to make the other party think that it is, it is possible to certainly make the other party think that communication with the user is impossible.

  In addition, since the mobile phone terminal according to Embodiment 2 of the present invention automatically terminates communication during a call, it is determined that it is useless even if the user does not understand the meaning of the other party's call and continues the call. Therefore, the other party can be made to think that the other party cannot communicate with the user.

  In the second embodiment of the present invention, the syllable string data is selected from predetermined ones, but any means may be used as long as it can output a meaningless voice for the other party. For example, a random syllable string or phoneme string may be generated each time a voice is output.

  In the second embodiment of the present invention, the condition for determining whether to output audio or disconnect communication (the range of the value of d in the branch determination in steps S215 and S221) is assumed to be constant. However, the condition may be changed, for example, the probability of disconnecting communication is increased every time there are incoming calls.

  In the first and second embodiments of the present invention, the terminal incorporates the voice output device of the present invention. For example, an external device connected to the terminal, such as an exchange, a repeater, or a server, is the voice of the present invention. An output device may be incorporated so that the voice of the user or the other party is processed and the voice is output.

  In the first and second embodiments of the present invention, an example of a mobile phone terminal has been described. However, the present invention is not limited to this, and the same effect can be obtained with a landline phone, an IP phone, a voice chat, an interphone, and the like. It is done.

The voice output device of the present invention can be used for a device that outputs a voice having randomness with respect to a user's input voice. For example, an electronic pet, a pet robot, a toy, a game machine, a game software, etc. It can also be used as an audio output device for configuring.
Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
This application is filed in Japanese Patent Application No. 1 filed on Aug. 2, 2005. 2005-233652, the contents of which are incorporated herein by reference.

  The voice output device and the voice output method of the present invention can make the caller think that the caller of the malicious call does not know the nationality of the user and cannot communicate with the user. This is effective for a voice communication apparatus capable of suppressing another malicious call by a caller and capable of making a call with an unspecified person.

  The present invention relates to an apparatus that processes input voice and outputs the voice, and more particularly to a voice output apparatus that can be used as a means for preventing illegal or unauthorized calls such as mischievous telephone calls in telephone communications.

  In recent years, “transfer fraud”, which attempts to gain profits by fraudulently using people over the phone and transferring money to a designated account, has become a social problem. In addition, there is no end to the unscrupulous commercial law that attempts to sell expensive services and products that users do not want by using the telephone. In addition to malicious calls for the purpose of fraud and solicitation, call a random phone number and have the user speak to obtain personal information such as the nationality, gender and age of the user. It is also known that there are malicious calls trying to lead to fraud and solicitation.

  Conventionally, devices for repelling malicious calls such as mischievous telephones have been proposed. For example, there has been proposed a telephone device that converts the pitch period of a voice uttered by a user and listens to the other party. According to the present invention, even if a female user utters, the other party can hear a male voice, so that the other party can think that the user is a male and stop the prank call (for example, Patent Document 1). reference).

There is also a known method of giving up a mischievous call by using the automatic answering function of an answering machine and letting the other party hear a standard message such as “I can't answer the call right now”.
JP 2000-78246 A (6th page, FIG. 1)

  However, in the above-mentioned conventional apparatus, the gender of the user is prevented from being known to the other party, but the user's nationality is determined because it is transmitted to the other party while maintaining the utterance content of the user. As a result, there is a problem that it is insufficient as a countermeasure against malicious calls to obtain personal information of users. In addition, there is a problem that a person aiming at fraud or solicitation learns that communication with the user is possible and continues or repeats malicious calls.

  In addition, in the case of the conventional method in which a standard message is sent to the other party, the other party can easily determine that the message is not due to the user's utterance. There was a problem that the call was repeated many times.

  The present invention solves the above-described conventional problems, and makes the other party not aware of the nationality of the user and makes the other party think that communication with the user is impossible. An object of the present invention is to provide a voice communication apparatus capable of suppressing calls.

  In order to solve the above-described conventional problems, a speech output device according to the present invention includes speech analysis means for extracting phonological information from input speech, speech output control means for instructing speech output based on phonological information, and speech output control. Random phoneme speech is output based on phoneme information of the input speech using speech output means for outputting speech based on the instructions of the means.

  With the above configuration, voice that does not make sense for the listener based on the input voice can be output, so communication with the user is impossible without the other party knowing the nationality of the user. Can be thought of.

  In the speech output device of the present invention, the phoneme information includes information for identifying a phoneme or syllable included in the input speech, and the speech output control means configures the output speech by replacing the phoneme or syllable according to a predetermined rule. Determine phonemes or syllables to play.

  With the above-described configuration, a voice in which the phoneme or syllable of the input voice is replaced with another phoneme or syllable is output, so that a voice that does not make sense for the listener can be output. For this reason, it is possible to make it impossible to communicate with the user without knowing the nationality of the user.

  In the sound output device of the present invention, the phoneme information includes information indicating whether the input sound is sounded, and the sound output control means instructs sound output based on the information indicating whether sound is sounded.

  With the above configuration, since the start and stop of voice output can be controlled depending on whether or not the input voice is voiced, voice output that matches the utterance timing of the user or the other party can be performed. For this reason, it is possible to make it seem that communication with the user is impossible without giving the other party the room for suspicion that the output voice is a standard message or synthesized voice.

  In the speech output device of the present invention, the phoneme information includes information indicating the fundamental frequency of the input speech, and the speech output control means determines the fundamental frequency of the output speech based on the fundamental frequency information.

  With the above configuration, the change in the fundamental frequency of the output voice has fluctuations having the same characteristics as the change in the fundamental frequency of the input voice, and the naturalness of the output voice is increased. For this reason, it is possible to make it seem that communication with the user is impossible without giving the other party the room for suspicion that the output voice is a standard message or synthesized voice.

  The present invention also constitutes a voice communication device further comprising a communication means for executing communication processing and outputting output voice to a communication destination.

  With the above configuration, a voice communication device is provided that can prevent another malicious call by making the other party not know the nationality of the user and making it impossible to communicate with the user. be able to.

  The speech output method of the present invention includes a first step of extracting phonological information from an input speech, a second step of instructing output of an output speech composed of random phonemes based on the phonological information, And a third step of outputting the output sound based on the instruction.

  By the above method, voice that does not make sense for the listener can be output based on the input voice, so it is impossible to communicate with the user without knowing the nationality of the user. It can be reminiscent.

  According to the present invention, by generating random phonological information based on the phonological information of the input speech and outputting the speech, the other party who made the malicious call is not aware of the nationality of the user, It is possible to make it seem that communication with the person is impossible, and it is possible to suppress malicious calls again.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Note that in all the drawings for explaining the embodiments, the same reference numerals are given to the same components, and duplicate explanations are omitted.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of an audio output device 1 according to Embodiment 1 of the present invention. In FIG. 1, the audio output device 1 includes an audio analysis unit 2, an audio output control unit 3, and an audio output unit 4.

  The voice analysis unit 2 receives the input voice 201 and executes a voice analysis process, extracts phonological information of the input voice 201 and outputs phonological information 202. Note that “phonological information” described in this specification refers to phonological information of speech obtained as a result of speech analysis. For example, this specification includes symbols and symbol strings for identifying phonemes and syllables constituting speech, information indicating the strength and height of speech, information on fundamental frequencies, and information for distinguishing whether sound is present or not. It corresponds to "phoneme information".

  The sound output control means 3 receives the phoneme information 202 and outputs a sound output instruction 302 that instructs the output of the output sound 402. The audio output unit 4 outputs an output audio 402 based on the audio output instruction 302. Here, the voice output control means 3 outputs a voice output instruction 302 based on the phoneme information 202 so that the output voice 402 is composed of random phonemes.

  The voice analysis processing in the voice analysis means 2 may use a known voice analysis device or voice analysis method, and therefore detailed description thereof will be omitted in this specification. The voice output process in the voice output means 4 may use a known voice synthesizer or voice synthesizer, and therefore detailed description thereof will be omitted in this specification.

  FIG. 2 is a configuration diagram when the audio output device 1 according to Embodiment 1 of the present invention is configured as the mobile phone terminal 100. 2, the mobile phone terminal 100 includes a wireless communication unit 5, a microphone 61, a speaker 62, a signal switching unit 7, a signal switching button 91, an on-hook button 92, and an off-hook button 93 in addition to the components described in FIG.

  The voice analysis means 2 receives the input voice 201 and executes voice analysis processing, calculates the short-term average power of the input voice 201, and determines whether the received input voice 201 is a voiced section or a silent section. The signal “ON” is output as phoneme information 202 when there is sound and the signal “OFF” is output when there is no sound. The voice analysis unit 2 identifies phonemes by performing cepstrum analysis or the like on the input voice 201 and outputs phoneme symbols (for example, / p /, / a /) as phoneme information 202. Furthermore, the voice analysis means 2 outputs the fundamental frequency information representing the fundamental frequency every 30 milliseconds of the input voice 201 as the phoneme information 202.

  The voice output control means 3 determines the phoneme to be included in the output voice 402 and the fundamental frequency of the output voice 402 based on the phoneme symbol and the fundamental frequency information included in the phoneme information 202, and outputs it as the voice output instruction 302.

  The voice output unit 4 synthesizes and outputs the output voice 402 based on the phoneme and the fundamental frequency indicated by the voice output instruction 302. The audio output means 4 performs the articulation coupling process when the phoneme transitions, the interpolation process of the fundamental frequency change, and the like so that the output sound 402 does not become unnatural as a sound.

  The wireless communication means 5 is a part that connects the mobile phone terminal 100 to a wireless public network (not shown) and executes communication processing. The wireless communication means 5 outputs the transmission signal 501 to the wireless public network. Further, the wireless communication means 5 outputs the reception signal 502 acquired from the wireless public network to the speaker 62. The wireless communication means 5 starts outputting the transmission signal 501 to the wireless public network and acquiring the reception signal 502 from the wireless public network based on the operation of the off-hook button 93. The wireless communication means 5 ends the connection with the wireless public network based on the operation of the on-hook button 92.

  The microphone 61 converts the user's voice into an electrical signal and outputs a microphone output signal 612. The speaker 62 converts the received signal 502 into air vibration and emits sound. The signal switching means 7 is a means for switching and outputting two types of signals. By operating the signal switching button 91, the output sound 402 is output as the transmission signal 501 or the microphone output signal 612 is output as the transmission signal 501. Can be switched. In other words, the signal switching button 91 indicates which of the output voice 402 processed for the user's voice and the microphone output signal 612 that is not processed is output to the wireless public network to be heard by the other party. It is configured so that the user can select by the operation. The signal switching unit 7 outputs the output voice 402 as the transmission signal 501 in the initial state of the communication process by the wireless communication unit 5. This prevents inconvenience that the other party's personal information is heard by the other party because the other party's voice is heard without knowing that the other party is malicious. Can do.

  FIG. 3 is a diagram showing an appearance of the mobile phone terminal 100 according to the embodiment of the present invention. The signal switching button 91 is arranged on the side surface of the lower part of the casing so that the user can operate it without looking at his / her hand during a call.

  FIG. 4 is a diagram showing the contents of the phoneme replacement candidate table T31 held by the audio output control means 3 of the mobile phone terminal 100 according to Embodiment 1 of the present invention. The phoneme replacement candidate table T31 is a table showing another phoneme candidate for replacing a phoneme included in the phoneme information 202. Each record R311 to R318 of the phoneme replacement candidate table T31 includes a first field F311 representing a phoneme p constituting the phoneme information 202, and a second field F312 representing a candidate of another phoneme p ′ that replaces the phoneme p. Become. The speech output control means 3 generates a speech output instruction 302 by replacing the phoneme p constituting the phoneme information 202 with the phoneme p ′ according to a predetermined rule (hereinafter referred to as phoneme replacement rule) based on the phoneme replacement candidate table T31. That is, the speech output control means 3 searches the record R311 to R318 for a record including the phoneme p in the first field (F311) in the phoneme replacement candidate table T31, and the second field (F312) of the corresponding record indicates it. The phoneme p ′ is randomly selected from the phoneme p ′ candidates, and the phoneme p ′ is replaced with the phoneme p ′.

  FIG. 5 is a flowchart showing the processing procedure of audio output control means 3 of mobile phone terminal 100 according to Embodiment 1 of the present invention. The voice output control means 3 first acquires the phoneme information 202 (step S101), and the input voice 201 is voiced based on whether the signal included in the phoneme information 202 is “ON” or “OFF”. It is determined whether it is a section (step S102). If it is a voiced section (YES), the audio output control means 3 proceeds to step S103, and if it is a silent section (NO), the process proceeds to step S101.

  In step S103, the speech output control means 3 determines whether or not the phoneme included in the phoneme information 202 acquired this time is the same as the phoneme included in the phoneme information 202 acquired last time (NO), and proceeds to step S105. If they are different (YES), the process proceeds to step S104.

  In step S104, the voice output control unit 3 replaces the phoneme p constituting the phoneme information 202 with a new phoneme p 'in accordance with the phoneme replacement rule to obtain a voice output instruction 302. On the other hand, in step S105, the voice output control unit 3 replaces the phoneme p constituting the phoneme information 202 with the phoneme p 'obtained in the previous step S104 to obtain a voice output instruction 302. The determination in step S103 and the processing in step S105 are for converting a section in which the same phoneme in the input speech 201 is continued into a section in which another same phoneme is continued.

  In step S <b> 106, the voice output control unit 3 calculates the fundamental frequency F <b> 0 ′ according to the frequency conversion formula based on the fundamental frequency F <b> 0 indicated by the fundamental frequency information included in the phoneme information 202, and sets it as the voice output instruction 302. The frequency conversion formula is as follows.

F0 ′ = F0 * r * (random number (0.4) +0.8)
Here, r is a predetermined coefficient for instructing how much the fundamental frequency of the output speech 402 is to be higher than the fundamental frequency of the input speech 201. The coefficient r is set to r <1, so that the fundamental frequency of the output sound 402 can be made lower than the fundamental frequency of the input sound 201 as a whole. For example, if r = 0.5, the female voice of the input voice 201 is converted like a male voice and output as the output voice 402, thus preventing the calling party from knowing the gender of the user. it can. The coefficient r may be changed by a user operation. The random number (0.4) represents a random number less than 0.4. By giving fluctuations to the fundamental frequency with a random number or the like, the change in intonation of the input voice 402 can be disturbed, and the other party can recognize the language of the input voice 201 from the intonation of the output voice 402. Is preventing.

  In step S107, the audio output control unit 3 outputs the audio output instruction 302 generated by the processing up to step S106 to the audio output unit 4, and the process returns to step S101.

  The specific operation of Embodiment 1 of the present invention will be described below. In other words, this is a specific example in which the user's voice is processed and output to the wireless public network, and is then heard by the other party. Here, a case where the user is a woman whose native language is Japanese and the coefficient r is 0.5 will be described as an example.

  FIG. 6 is a diagram showing the contents of the input voice 201 and the output voice 402 when the user utters the voice “Where?” During a call in the mobile phone terminal 100 according to Embodiment 1 of the present invention. In FIG. 6, the horizontal axis represents time, and the vertical axis represents the fundamental frequency. A line group L101 represents a change in the fundamental frequency of the input sound 201, and a line group L102 represents a change in the fundamental frequency of the output sound 402. The phoneme symbols described immediately above the line group L101 and the line group L102 are the phonemes (D101 to D106) included in the phoneme information 202 and the phonemes (D111 to D116) indicated by the voice output instruction 302, respectively. Show. Hereinafter, the operation of the mobile phone terminal 100 according to the first embodiment of the present invention will be described with reference to FIG.

  First, when the user starts a call, the voice analysis unit 2 analyzes the input voice 201 and extracts the phoneme information 202 at time t101. The phoneme information 202 includes phoneme / d / (D101) and fundamental frequency F0 information, and a signal “ON” indicating a voiced section.

  Next, the audio output control means 3 executes processing according to the procedure shown in the flowchart of FIG. In step S <b> 101, the audio output control unit 3 acquires phonological information 202. In step S102, the sound output control means 3 is a sound section ("ON") (YES), so the process proceeds to step S103. In step S103, the voice output control means 3 has newly accepted the phoneme / d /, so the determination is “YES”, and the flow proceeds to step S104.

  In step S104, the speech output control means 3 refers to the phoneme replacement candidate table T31 in FIG. 4 and selects a phoneme p 'for replacing the phoneme / d / according to the phoneme replacement rule. At this time, since the record having the phoneme / d / as the first field in the phoneme replacement candidate table T31 is the record R313, the voice output control means 3 randomly selects from the phonemes / k / or / g /. A phoneme is defined as a phoneme p ′. Here, it is assumed that / k / is selected as the phoneme p '.

  In step S106 of FIG. 5, the audio output control means 3 calculates the basic frequency F0 ′ according to the frequency conversion equation. In step 107, the audio output control means 3 uses the phoneme / k / and the basic frequency F0 ′ as the audio output instruction 302. Output.

  Further, the voice output unit 4 synthesizes and outputs the output voice 402 based on the voice output instruction 302. As shown in FIG. 6, the output sound 402 is a sound composed of phonemes / k / (D111), and the fundamental frequency is about half of the fundamental frequency of the input sound 201.

  By performing the same process on the phoneme / o / (D102) portion of the input speech 201, the output speech 402 composed of the phoneme / i / (D112) is output from the speech output means 4. The output voice 402 is sent to the wireless communication means 5 as the transmission signal 501 through the signal switching means, and is further outputted to the terminal of the other party through the wireless public network.

  Since the next phoneme / ch / (D103) is an unvoiced consonant, the speech analysis means 2 cannot extract the fundamental frequency and outputs 0 as the value of the fundamental frequency F0 in the phoneme information 202. The voice output control means 3 outputs 0 as the value of the fundamental frequency F0 ′ in the process of step S106, but the voice output means 4 accepts the fundamental frequency of the phoneme / i / (D112) accepted last time and the next accepted frequency. The basic frequency of the phoneme / a / (D114) is interpolated to change the basic frequency of the output speech 402 corresponding to the phoneme / r / (D113) smoothly.

  Further, the fundamental frequency of the phoneme / i / (D115) of the output speech 402 corresponding to the phoneme / a / (D105) of the input speech 201 is the previous phoneme due to the influence of random numbers in the frequency conversion formula of step S106 in FIG. It is slightly higher than the fundamental frequency of / n /.

  Thereafter, by repeating the same processing, the Japanese input voice 201 “Whisama?” Is converted into a male voice “Kirani Johi?” That does not make sense as Japanese, and is transmitted via a wireless public network. It is output from the other party's terminal.

  As described above, in the mobile phone terminal 100 according to Embodiment 1 of the present invention, as a first step, the speech analysis means 2 extracts phonological information from the input speech 201 and outputs the phonological information 202. As a step, the voice output control means 3 executes processing in the procedure shown in the flowchart of FIG. 5 to output a voice output instruction 302 based on the phonological information 202. As a third step, the voice output means 4 outputs a voice output instruction 302. The output voice 402 is synthesized and output based on the above. By this voice output method, random voice in which the phoneme of the input voice is replaced with another phoneme can be output to the terminal of the other party.

  As is clear from the above description, the mobile phone terminal according to Embodiment 1 of the present invention outputs a voice in which the phoneme of the input voice is replaced with another phoneme to the other party's terminal. Therefore, it is possible to make the call partner feel that communication with the user is impossible without knowing the nationality of the user.

  In addition, the mobile phone terminal according to Embodiment 1 of the present invention has fluctuations in which the change in the fundamental frequency of the output voice has a statistically similar property to the change in the fundamental frequency of the input voice. As a result, it is possible to make the call partner surely think that it is impossible to communicate with the user without giving the call partner room to suspect that the output voice is a standard message or a synthesized voice.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. The second embodiment is characterized in that the received signal that is the output of the wireless communication means 5 is used as the input voice.

  FIG. 7 is a configuration diagram of the mobile phone terminal 200 according to Embodiment 2 of the present invention. In FIG. 7, the mobile phone terminal 200 includes a voice analysis unit 2, a voice output control unit 3, a voice output unit 4, a fixed syllable holding unit 41, a wireless communication unit 5, a microphone 61, a speaker 62, a signal switching unit 7, and a signal switching button. 91, an on-hook button 92, and an off-hook button 93. Here, the fixed syllable holding means 41 is a means for holding a fixed syllable string for constituting the output sound 402.

  The voice analysis unit 2 accepts the received signal 502 that is the output of the wireless communication unit 5 as the input voice 201, executes voice analysis processing, calculates the short-term average power of the input voice 201, and the received input voice 201 is It is determined whether it is a voiced section or a silent section, and a signal “ON” is output as phoneme information 202 when there is a voice and a signal “OFF” is output when there is no sound.

  The voice output control unit 3 generates a syllable string ID for identifying a syllable string to be output as the output voice 402 based on the phonological information 202, and outputs the syllable string ID as a voice output instruction 302. The audio output control unit 3 outputs an on-hook signal 304 that is an instruction for the wireless communication unit 5 to end the connection with the wireless public network.

  The voice output means 4 synthesizes and outputs the output voice 402 based on the syllable string data acquired from the fixed syllable holding means 41 based on the syllable string ID included in the voice output instruction 302. The fixed syllable holding means 41 holds a syllable string table which is a table for obtaining syllable string data based on the syllable string ID.

  FIG. 8 is a diagram showing the contents of the syllable string table T41 held by the fixed syllable holding means 41 of the mobile phone terminal 200 according to Embodiment 2 of the present invention. Each record R411 to R414 of the syllable string table T41 includes a first field F411 representing a syllable string ID and a second field F412 representing syllable string data corresponding to the syllable string ID. The syllable string data is represented by a string of pairs of syllables (alphabetic characters enclosed in parentheses []) to be output as the output speech 402 and coefficients of fundamental frequencies of syllables (numeric values enclosed in parentheses ()). Yes. For example, the syllable string data “[ho] (1.0), [la] (1.2)” corresponding to the syllable string ID = 1 stored in the record R411 includes the syllable [ho] and the syllable [la]. Are continuously output at a medium fundamental frequency and a higher fundamental frequency.

  Further, in FIG. 8, the syllable string data corresponding to the syllable string ID = 1 in the record R411 is made to make the caller feel as if it is a fixed phrase (for example, “Hello”) uttered as a greeting immediately after the start of the call. It is data of. Further, the syllable string data corresponding to the syllable string ID = 2 in the record R412 is data for making the calling party feel as if it is a fixed phrase (for example, “Yes?”) Uttered when asking the calling party. It is. The syllable string data is intended to generate speech that does not make sense to the other party, but prepares syllable string data in advance to make the other party think as if it is some fixed phrase. Occasionally, by making it appear in the output voice 402, naturalness as a natural language is born in the output voice 402, and it is possible to make the other party believe that the output voice 402 is due to the voice of the user himself / herself. it can.

  9 to 11 are flowcharts showing the processing procedure of the audio output control means 3 of the mobile phone terminal 200 according to Embodiment 2 of the present invention. The voice output control means 3 first acquires the phoneme information 202 in step S211, and the input voice 201 is determined based on whether the signal included in the phoneme information 202 is "ON" or "OFF" in step S212. Judge whether it is a voiced section. If it is a voiced section (YES), the audio output control means 3 proceeds to step S221 in FIG. 10, and if it is a silent section (NO), the process proceeds to step S213.

  In step S213, the audio output control unit 3 determines whether the audio output unit 4 is outputting the output audio 402. If the audio output unit 4 is outputting (YES), the process returns to step S211. If not output (NO). Proceed to step S214. In step S214, the voice output control means 3 determines whether or not the silent section of the input voice 201 is the first silent section after the start of the call, that is, immediately after the start of the call. If it is the first silent section (YES) The process proceeds to step S231 in FIG. 11, otherwise (NO), the process proceeds to step S215.

  In step 215, the audio output control means 3 generates a pseudo random number d of 0 or more and less than 1, and branches the process depending on the value. If d is less than 0.2, the process proceeds to step S216. If d is not less than 0.2 and less than 0.9, the process proceeds to step S217. If d is not less than 0.9, the process proceeds to step S219.

  In step S216, the voice output control means 3 selects to output a syllable string ID = 2, that is, to output a syllable string that asks the other party. In step S217, the audio output control means 3 randomly selects a syllable string ID from the syllable string ID or the syllable string ID = 0 stored in the syllable string table T41 of FIG. The syllable string ID = 0 indicates that the output sound 402 of the sound output means 4 is stopped. In step S218, the audio output control means 3 outputs the syllable string ID selected in step S216 or S217 as the audio output instruction 302, and returns to step S211.

  In step S219, the audio output control means 3 outputs the on-hook signal 304, whereby the wireless communication means 5 ends the connection with the wireless public network. In this way, by executing the process of probabilistically disconnecting the call, the user can understand the meaning of the other party's utterance and decide that it is useless to continue the call, so that the call is performed as if an on-hook operation was performed. You can make your opponent think. In addition, since the voice output control means 3 automatically instructs to disconnect the call after a while from the start of the call, it is not necessary for the user himself to operate the on-hook button 92 while listening to the voice of the other party with malicious intent. , Improve convenience.

  Steps S221 to S229 in FIG. 10 are processing procedures of the voice output control means 3 when the input voice 201 is in a voiced section in step S212 in FIG. 9, that is, when the other party is making a voice. In step S221, the audio output control means 3 generates a pseudo-random number d that is greater than or equal to 0 and less than 1, and branches the process depending on the value. When d is less than 0.998, the process proceeds to step S222, and when d is 0.998 or more, the process proceeds to step S229.

  In step S222, the audio output control means 3 sets syllable string ID = 0, outputs an audio output instruction 302 in step S223, and returns to step S211. Steps S <b> 222 to S <b> 223 are processes for making the calling party think as if the user interrupted the speaking because the calling party started speaking while the user was speaking. Through the processing of steps S222 to S223, it is possible to make the other party believe that the user is speaking while listening to the voice of the other party.

  In step S229, when the audio output control means 3 outputs the on-hook signal 304, the wireless communication means 5 ends the connection with the wireless public network.

  Steps S231 to S239 in FIG. 11 are the processing procedures of the voice output control means 3 immediately after the start of the call, that is, when it is determined in step S214 in FIG. 9 that the silence period of the input voice 201 is the first silence period after the start of the call. It is. In step S231, the audio output control means 3 determines whether or not the two outputs of the syllable string ID have already been completed. If not completed (NO), the process proceeds to step S232, and if completed, (YES) step. Proceeding to S239, the on-hook signal 304 is output.

  In step S232, the voice output control means 3 selects to output a syllable string ID = 1, that is, to output a syllable string such as a greeting immediately after the start of a call. In step S233, the voice output instruction 302 is output, and step S211 of FIG. Return to. Steps S <b> 231 to S <b> 239 are processes for making the caller feel as if the call is disconnected because the user greets immediately after the start of the call and there is no response from the caller even after greeting twice.

  When the audio output control unit 3 outputs the audio output instruction 302 in steps S218, S223, and S233, the audio output unit 4 accepts it and outputs the output audio 402 in the following procedure. First, the voice output means 4 obtains syllable string data corresponding to the syllable string ID included in the voice output instruction 302 by searching the syllable string table T41 (FIG. 8). Next, the voice output means 4 synthesizes and outputs the output voice 402 based on the syllable string data. At this time, the sound output means 4 calculates the fundamental frequency F0 'of the output sound 402 for each syllable according to the frequency calculation formula based on the coefficient α of the fundamental frequency indicated by the syllable string data. The frequency calculation formula is as follows.

F0 ′ = F0base * α * (random number (0.4) +0.8)
Here, F0base is an initial value of the fundamental frequency of the output sound 402. By adjusting the value of F0base, the output sound 402 can be made into a male voice or a female voice. For example, if F0base = 120 Hz, the output voice 402 can be a male voice. The value of F0base may be changed by a user operation. The random number (0.4) represents a random number less than 0.4. By multiplying the fundamental frequency by a random number, a variation can be given to the intonation change of the output voice 402, thereby preventing the other party from realizing that the output voice 402 is due to synthesis. The voice output means 4 performs a process of interpolating the fundamental frequency of the preceding and following syllables at the syllable boundary so that the output voice 402 does not become unnatural as a voice. The specific operation of Embodiment 2 of the present invention will be described below. That is, in the second embodiment, the synthesized voice based on the result of analyzing the voice of the other party as an input voice is output to the wireless public network as the output voice, and the other party is told. Hereinafter, a case where the other party makes a silent call will be described.

  FIG. 12 is a diagram showing the contents of output audio 402 in mobile phone terminal 200 according to Embodiment 2 of the present invention. In FIG. 12, the horizontal axis represents time, and the vertical axis represents the fundamental frequency. Syllable symbols D211 to D214 represent syllables included in the output speech 402. Hereinafter, the operation of the mobile phone terminal 200 according to Embodiment 2 of the present invention will be described with reference to FIG.

  First, when a user starts a call by operating the off-hook button 93 at time t201 when an incoming call is received, the voice analysis means 2 analyzes the input voice 201 and extracts phoneme information 202. The extracted phoneme information 202 includes a signal “OFF” indicating silence.

  Next, the audio output control means 3 executes processing in the procedure shown in the flowcharts of FIGS. In step S <b> 211, the audio output control unit 3 acquires phonological information 202. In step S212, the audio output control means 3 is a silent section (“OFF”) (NO), so the process proceeds to step S213. In step S213, the audio output control means 3 does not output the output audio 402 (NO), so the process proceeds to step S214. In step S214, since the voice output control means 3 is the first silent section after the start of the call (YES), the process proceeds to step S231 in FIG.

  In step S231, since the audio output control means 3 has not output the output audio 402 even once (NO), the process proceeds to step S232. In step S232, the audio output control means 3 sets the syllable string ID to 1, and outputs an audio output instruction 302 in step 233.

  Furthermore, the voice output unit 4 receives the voice output instruction 302, and refers to the syllable string table T41, and the syllable string data “[ho] (1.0), [la] (1.2” corresponding to the syllable string ID = 1. ”” (The second field F412 of the record R411 in FIG. 8) is obtained and the output sound 402 (D211 and D212 in FIG. 12) is synthesized. Here, the coefficient α of the syllable string data is set so that the fundamental frequency of the syllable [la] is higher, with the syllable [ho] being 1.0 and the [la] being 1.2. The fundamental frequency of 402 is higher for syllable [ho] (D211) than for syllable [la] (D212). This is because the fundamental frequency of the output sound 402 is fluctuated by the random number term in the frequency calculation formula.

  Thereafter, the second output of the output sound 402 is performed by the same processing (parts D213 and D214 in FIG. 12). Since the audio output control means 3 has already been output twice in the third process of step S231 (YES), the process proceeds to step S239, and the on-hook signal 304 is output, so that the wireless communication means 5 is wireless at time t202 in FIG. Close the connection with the public network.

  As described above, the mobile phone terminal according to the second embodiment of the present invention has a voice for making the other party feel like a fixed phrase that is uttered as a greeting when the other party makes a silent call. Is output a predetermined number of times, and then the connection with the public network is automatically terminated.

  As another specific operation of the second embodiment of the present invention, a case where a malicious call for the purpose of fictitious billing is received will be described as an example.

  FIG. 13 is a diagram showing the contents of the input voice 201 and the output voice 402 in the mobile phone terminal 200 in the mobile phone 2 of the present embodiment. In FIG. 13, the horizontal axis represents time. FIG. 13A, FIG. 13B, and FIG. 13C show the continuous operation divided into three for convenience. In FIG. 13, texts D301 to D305 represent the input voice 201, that is, the contents of the voice of the other party, and texts D311 to D315 represent the contents of the output voice 402. In FIG. 13, information on the fundamental frequencies of the input sound 201 and the output sound 402 is omitted. Hereinafter, the operation of the mobile phone terminal 200 according to the second embodiment will be described with reference to FIG. The process from when the user operates the off-hook button 93 at time t301 to the time when the first output sound 402 (D311) is output is the same as the process in the above-described operation example according to the second embodiment of the present invention. Since it is the same, description is abbreviate | omitted.

  When the voice D301 is input, the voice analysis unit 2 analyzes the input voice 201 and extracts phonological information 202. The extracted phoneme information 202 includes a signal “ON” indicating sound.

  Next, the audio output control means 3 executes processing in the procedure shown in the flowcharts of FIGS. In step S <b> 211, the audio output control unit 3 acquires phonological information 202. In step S212, since the sound output control means 3 is a sound section (“ON”) (YES), the process proceeds to step S221 in FIG.

In step S221, the audio output control means 3 generates a pseudo random number d. Here, if d = 0.2, since d <0.998, the process proceeds to step S222, and the syllable string ID = 0. This is output as an audio output instruction 302 in step S223. The voice output unit 4 receives the voice output instruction 302 but does not output the output voice 402 because the syllable string ID = 0.

  While the input sound 201 is being input, the above process is repeated, so that the output sound 402 is not output.

  When the voice D301 ends, the voice analysis means 2 outputs phonological information 202 including a signal “OFF” indicating silence. The voice output control means 3 acquires the phoneme information 202 (step S211), and proceeds to step S213 based on the determination (NO) in step S212, and further proceeds to step S214 because the voice is not being output. In step S214, the audio output control means 3 is not the first silent section (NO), so the process proceeds to step S215.

  If the value of the pseudo random number d generated by the audio output control means 3 in step S215 is 0.3 here, since 0.2 ≦ d <0.9, the process proceeds to step S217. In step S217, the voice output control means 3 randomly selects a syllable string ID. Here, if ID = 3, the voice output control means 3 outputs a voice output instruction 302 including the syllable string ID = 3 in step S218. Output.

  The voice output means 4 accepts the voice output instruction 302 and refers to the syllable string table T41 to obtain syllable string data [[ki] (1.0), [ru] (0.9), [mi] (0.9). , [Ji] (1.2), [hi] (1.1), [go] (1.0), [che] (1.3), [si] (1.5)] (in FIG. The second field F412) of the record R413 is obtained, and the sound D312 (FIG. 13) is output as the output sound 402.

  The voice D313 “chegi?” Is used when the value of the pseudo random number d generated by the voice output control means 3 in step S215 is smaller than 0.2 and becomes syllable string ID = 2 in step S216, or in step S217. This is an output when 2 is selected as the ID.

  If the other party starts speaking at time t302 while the voice D314 is being output, the voice output control means 3 proceeds to the process of FIG. 10 by the determination (YES) in step S212. Here, if the pseudo-random number d generated by the audio output control means 3 in step S221 is 0.7, since d <0.998, the audio output control means 3 executes the processing of steps S222 and S223, The output means 4 interrupts the output of the output sound 402 at time t303 in FIG.

  If the value of the pseudo random number d generated by the audio output control means 3 in step S221 while the audio D305 is being input is 0.9984 here, since d ≧ 0.998, the audio output control means 3 outputs an on-hook signal 304 in step S229, whereby the wireless communication means 5 terminates the connection with the wireless public network at time t304.

  As described above, the mobile phone terminal according to Embodiment 2 of the present invention makes it appear that the user is having a conversation by outputting a voice that does not make sense to the other party in the middle of the other party's voice. After that, the call is automatically disconnected.

  As is clear from the above description, since the mobile phone terminal according to Embodiment 2 of the present invention outputs a syllable string to the call partner's terminal at random, it may output a voice that does not make sense to the call partner. Therefore, it is possible to make the call partner think that communication with the user is impossible without knowing the nationality of the user.

  In addition, since the mobile phone terminal according to Embodiment 2 of the present invention can change the output of the voice based on whether or not the voice of the other party is voiced, it can output the voice according to the utterance situation of the other party. Therefore, it is possible to make the other party think that it is impossible to communicate with the user without giving the other party the room to suspect that the output voice is a standard message or synthesized voice.

  In addition, since the mobile phone terminal according to the second embodiment of the present invention outputs a standard voice from time to time, the naturalness of the output voice increases, so that there is no doubt that the output voice is a standard message or synthesized voice. It is possible to surely make the other party think that communication with the user is impossible.

  In addition, since the mobile phone terminal according to Embodiment 2 of the present invention stops the voice output when the other party starts speaking during the voice output, the user actually speaks while listening to the voice of the other party. Since it is possible to make the other party think that it is, it is possible to certainly make the other party think that communication with the user is impossible.

  In addition, since the mobile phone terminal according to Embodiment 2 of the present invention automatically terminates communication during a call, it is determined that it is useless even if the user does not understand the meaning of the other party's call and continues the call. Therefore, the other party can be made to think that the other party cannot communicate with the user.

  In the second embodiment of the present invention, the syllable string data is selected from predetermined ones, but any means may be used as long as it can output a meaningless voice for the other party. For example, a random syllable string or phoneme string may be generated each time a voice is output.

  In the second embodiment of the present invention, the condition for determining whether to output audio or disconnect communication (the range of the value of d in the branch determination in steps S215 and S221) is assumed to be constant. However, the condition may be changed, for example, the probability of disconnecting communication is increased every time there are incoming calls.

  In the first and second embodiments of the present invention, the terminal incorporates the voice output device of the present invention. For example, an external device connected to the terminal, such as an exchange, a repeater, or a server, is the voice of the present invention. An output device may be incorporated so that the voice of the user or the other party is processed and the voice is output.

  In the first and second embodiments of the present invention, an example of a mobile phone terminal has been described. However, the present invention is not limited to this, and the same effect can be obtained with a landline phone, an IP phone, a voice chat, an interphone, and the like. It is done.

The voice output device of the present invention can be used for a device that outputs a voice having randomness with respect to a user's input voice. For example, an electronic pet, a pet robot, a toy, a game machine, a game software, etc. It can also be used as an audio output device for configuring.
Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
This application is based on Japanese Patent Application No. 2005-223652 filed on August 2, 2005, the contents of which are incorporated herein by reference.

  The voice output device and the voice output method of the present invention can make the caller think that the caller of the malicious call does not know the nationality of the user and cannot communicate with the user. This is effective for a voice communication apparatus capable of suppressing another malicious call by a caller and capable of making a call with an unspecified person.

1 is a schematic configuration diagram of an audio output device according to Embodiment 1 of the present invention. Configuration diagram of mobile phone terminal according to Embodiment 1 of the present invention External view of mobile phone terminal according to Embodiment 1 of the present invention The figure explaining the content of the phoneme replacement candidate table which the audio | voice output control means of the mobile telephone terminal in Embodiment 1 of this invention hold | maintains The flowchart which shows the process sequence of the audio | voice output control means of the mobile telephone terminal in Embodiment 1 of this invention. The figure explaining operation | movement of the mobile telephone terminal in Embodiment 1 of this invention Configuration diagram of mobile phone terminal according to Embodiment 2 of the present invention The figure explaining the content of the syllable string table which the audio | voice output means of the mobile telephone terminal in Embodiment 2 of this invention hold | maintains First flowchart showing the processing procedure of the voice output control means of the mobile phone terminal according to the second embodiment of the present invention. Second flowchart showing the processing procedure of the voice output control means of the mobile phone terminal according to the second embodiment of the present invention. Third flowchart showing the processing procedure of the voice output control means of the mobile phone terminal according to the second embodiment of the present invention. The figure explaining 1st operation | movement of the mobile telephone terminal in Embodiment 2 of this invention The figure explaining 2nd operation | movement of the mobile telephone terminal in Embodiment 2 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Audio | voice output apparatus 2 Audio | voice analysis means 3 Audio | voice output control means 4 Audio | voice output means 5 Wireless communication means 7 Signal switching means 41 Fixed syllable holding means 61 Microphone 62 Speaker 91 Signal switching button 92 On-hook button 93 Off-hook button 100,200 201 Input voice 202 Phoneme information 302 Voice output instruction 304 On-hook signal 402 Output voice 501 Transmission signal 502 Reception signal 612 Microphone output signal

Claims (6)

Speech analysis means for extracting phonological information from input speech;
Voice output control means for instructing voice output based on the phonological information;
Audio output means for outputting audio based on the instructions;
An audio output device comprising:
A speech output device configured to output speech of random phonemes based on phoneme information of the input speech. The phonological information includes information for identifying a phoneme or syllable included in the input speech,
The speech output apparatus according to claim 1, wherein the speech output control means determines a phoneme or syllable constituting the output speech by replacing the phoneme or syllable according to a predetermined rule. The phonological information includes information indicating whether or not the input speech is speech,
The audio output device according to claim 1, wherein the audio output control unit instructs audio output based on information indicating whether the sound is present. The phonological information includes information representing a fundamental frequency of the input speech,
4. The audio output device according to claim 1, wherein the audio output control unit determines a fundamental frequency of the output audio based on the fundamental frequency. 5. A communication means for executing communication processing and outputting the output sound to a communication destination;
An audio communication device comprising the audio output device according to any one of claims 1 to 4. A first step of extracting phonological information from the input speech;
A second step of instructing random phonological speech output based on the phonological information;
A third step of outputting the output sound based on the instruction;
An audio output method comprising:

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