JP2005124080A - Mobile communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communication terminal in which the emotion of a pet animal such as dog or cat can be identified from its cry without deteriorating a sound quality during a call. <P>SOLUTION: The mobile communication terminal comprises: a microphone 2 for converting speaking voices and animal's cries into electric signals and outputting them as audio signals; a variable filter 8 for switching a predetermined speech band a cry band adding a wider frequency band to the speech band to be selected as a passband and restricting an audio signal band according to the selected passband; a radio communication processing section 13 for transmitting an audio signal of which the band is restricted by the speech band, by radio as a transmission sound; and an emotion identification processing section 12 for analyzing the frequency of the cry band with respect to the audio signal of which the band is restricted by the cry band, and identifying the emotion of the animal on the basis of the result of the analysis. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mobile communication terminal such as a mobile phone, and more particularly to a mobile communication terminal capable of identifying animal emotions by performing audio feature analysis on animal calls.

  2. Description of the Related Art A voice translation device for communicating with pets such as dogs and cats has been known. This type of voice translation device analyzes the voice characteristics of animal voices and identifies emotions of animals based on the analysis results (for example, Patent Document 1). In the case of the voice translation device disclosed in Patent Document 1, the frequency distribution of animal voices is obtained in time series, and a two-dimensional voice pattern with respect to the frequency axis and the time axis is extracted. By comparing this voice pattern with a voice pattern stored in advance for each emotion, the emotion of the animal is identified.

  Such a voice translation device is intended to communicate with a pet animal, and is therefore required to be highly portable. Therefore, it is considered highly convenient if a voice translation function can be realized in a mobile phone that is always carried by a user and is already widely used. In addition, since the mobile phone is provided with a microphone for inputting voice and a liquid crystal display for displaying a telephone number, etc., the animal call is converted into an electric signal using the microphone, and the liquid crystal display is used. If the identification result of emotion is displayed using, it is considered that a voice translation function can be realized with a mobile phone while suppressing an increase in cost.

  However, since the frequency band is different between a voice uttered by a person (speech sound) and a voice uttered by a pet animal such as a dog or a cat (animal cry), the conventional mobile phone cannot perform emotion identification. There was a problem.

  In general, the frequency band (speech band) of speech sound is 700 Hz to 3.3 kHz. In a mobile phone, the band of an audio signal is limited by using a filter having this frequency band as a pass band, and noise outside the call band is reduced. It has been removed. On the other hand, in the case of a dog's cry, the frequency band is 100 Hz to 8 kHz, and includes a lower frequency to a considerably higher frequency than the above-mentioned call band. For this reason, in the conventional mobile phone, even if the emotion identification is performed from the animal voice, the frequency component outside the call band, particularly the frequency component (100 to 700 Hz) lower than the call band is removed. It was not possible to accurately identify emotions for animal calls characterized by

  Therefore, it is conceivable to expand the pass band of the filter in order to match the band limitation on the audio signal to the frequency band (sound band) of animal calls. However, if the pass band of the filter is expanded, emotions can be identified from animal calls, but frequency components outside the call band are also transmitted wirelessly as part of the transmitted sound during a call. There was a problem that the sound quality deteriorated in the mobile phone that received the speech sound. In particular, if the passband is expanded to the low-pitched sound side, an unpleasant low-frequency sound will be increased.

  Further, the above-described liquid crystal display and microphone are usually provided on the operation surface of the terminal housing in order to improve operability. In this case, there is also a problem that it is difficult to see the display content displayed on the liquid crystal display because the operation surface provided with the microphone must be directed to the animal side in order to identify the emotion of the animal.

In addition, a mobile phone has conventionally been provided with a speaker for outputting a ringtone and a vibrator for performing ringing vibration. In this case, if there is an incoming call when the emotion of the animal is identified, there is also a problem that an alarm or fear may be given to the animal to be identified by the ringing tone or the incoming vibration.
Utility Model Registration No. 3083915 Japanese Patent Laid-Open No. 10-3479

  As described above, in the conventional mobile phone, the frequency band of the utterance sound and the animal cry is different, so there is a problem that the emotion cannot be identified. There was a problem that sound quality deteriorated during a call. There is also a problem that it becomes difficult to see the content displayed on the liquid crystal display during emotion identification. In addition, there is a problem that alertness and fear may be given to an animal to be identified by an incoming call at the time of emotion identification.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a mobile communication terminal such as a mobile phone that can identify animal emotions from animal calls. It is another object of the present invention to provide a mobile communication terminal that can accurately identify emotions from animal calls and suppress deterioration of sound quality during a call. It is another object of the present invention to provide a mobile communication terminal with improved display visibility during emotion identification. It is another object of the present invention to provide a mobile communication terminal that reduces an alarming or fearful feeling to an animal during emotion identification.

  The mobile communication terminal according to the present invention includes a voice input means for converting a speech sound and an animal voice into an electrical signal and outputting it as a voice signal, and a voice band obtained by adding a predetermined call band and a lower frequency band to the call band. Are selected as a pass band, band limiting means for limiting the band of the audio signal by the selected pass band, and transmitting means for wirelessly transmitting the audio signal band limited by the call band as a transmission sound, The voice signal is subjected to frequency analysis in the voice band for the voice signal band-limited by the voice band, and is configured by emotion identification means for identifying the animal's emotion based on the analysis result.

  According to such a configuration, since the pass band for the audio signal can be switched, at the time of a call, the audio signal band-limited with the predetermined call band corresponding to the frequency band of the uttered sound as the pass band is wirelessly transmitted, At the time of animal emotion identification, emotion identification is performed based on a voice signal that is band-limited using a voice band obtained by adding a lower frequency band necessary for performing emotion identification from an animal voice as a pass band. Therefore, it is possible to identify emotions of animals without degrading sound quality during a call.

  In addition to the above-described configuration, the mobile communication terminal according to the present invention includes a call A / D conversion means for converting a voice signal band-limited by the call band into a digital signal at a predetermined call sampling frequency, and the sound band. A voice A / D conversion means for converting the voice signal band-limited by the voice into a digital signal at a voice sampling frequency higher than the telephone sampling frequency, and the transmission means includes the telephone A / D The voice signal digitized by the D conversion means is wirelessly transmitted, and the emotion identification means is configured to perform emotion identification based on the voice signal digitized by the voice A / D conversion means. According to such a configuration, the band is limited by the voice band including a frequency lower than the call band, and the emotion identification is performed based on the voice signal sampled at the sampling frequency for voice. It can be done more accurately.

  In addition to the above-described configuration, the mobile communication terminal according to the present invention includes a terminal case in which the voice input unit is provided on the operation surface, and an operation key that is provided on the operation surface of the terminal case and allows a user to perform a call operation. The first operation input means, which is provided on the operation surface of the terminal housing, is provided on the opposite side of the operation surface of the terminal housing and the first display means for displaying the operation state of the user during the outgoing operation. The second display means performs display related to the identification processing by the emotion identification means. When performing animal emotion recognition, the operation surface provided with the voice input means must be directed to the animal side in order to input the animal voice to the voice input means. In such a case, according to the above configuration, the second display means is provided on the opposite side of the operation surface, and information related to the identification process, for example, the end of the identification process is displayed on the second display means. Even when the operation surface is directed to the animal side at the time of emotion identification, the end of the emotion identification process can be easily confirmed. As such a second display means, in particular, a sub-display that is provided in a mobile phone whose terminal case can be folded and that displays an incoming call notification message when the case is folded is suitable.

  Further, if the first display means is composed of a first liquid crystal panel and a first backlight, and the first backlight is configured to be turned off based on a user operation that instructs identification processing, At the time of emotion identification, since the first backlight of the first display means provided on the operation surface directed toward the animal is turned off, the stimulus for vision is suppressed, and the animal is wary and fearful. Can be reduced. That is, it is possible to identify the emotion of the animal without being surprised by the animal to be identified. Furthermore, since the first backlight is automatically turned off based on a user operation for instructing identification processing, power consumption can be reduced.

  Further, if the second display means comprises a second liquid crystal panel and a second backlight, and the second backlight is configured to be lit based on a user operation instructing an identification process, At the time of emotion identification, it is possible to easily confirm the display content on the second display means on which the display relating to the identification process is performed.

  In addition to the above configuration, the mobile communication terminal according to the present invention further includes a ring tone output unit that outputs a ring tone based on the operating state of the emotion identification unit when an incoming call is received, and the ring tone output unit includes the emotion identification unit. The ring tone is not output during the identification process. According to such a configuration, since the ringtone is not output during the identification process, the auditory stimulation is suppressed while the identification process is being performed, and the animal is wary and fearful. Can be reduced.

  In addition to the above-described configuration, the mobile communication terminal according to the present invention includes a vibration unit that is driven based on the operation state of the emotion identification unit when receiving an incoming call, and that performs vibration of the incoming call, and the vibration unit performs an identification process by the emotion identification unit. It is configured not to perform incoming vibration during. According to such a configuration, since the incoming call vibration is not performed during the identification process, it is possible to reduce the alertness and fear of the animal while the identification process is being performed.

  In addition to the above-described configuration, the mobile communication terminal according to the present invention is configured such that, when there is an incoming call during the identification process by the emotion identification unit, the sender information is displayed on the second display unit. According to such a configuration, when emotion identification is performed with the operation surface facing the animal side, the sender information displayed at the time of incoming call is displayed on the second display means provided on the opposite side of the operation surface. Since it is displayed, the display content can be easily confirmed.

  In addition to the above-described configuration, the mobile communication terminal according to the present invention includes a second operation input unit provided on a side surface of the terminal housing, and the emotion identification unit is based on an operation input in the second operation input unit. Configured to start the identification process. At the time of animal emotion recognition, the operation surface must be directed to the animal side, and the operability is not good if the identification process is started by operating the first operation input means provided on the operation surface. However, according to the above configuration, the second operation input means is provided on the side surface of the terminal housing, and the identification process is started based on the operation input in the second operation input means. The identification process can be easily started even if it is directed toward the camera, and the operability can be improved. As such second operation input means, a side key provided for a mobile phone equipped with a digital camera and used for a shutter operation is particularly suitable.

  According to the mobile communication terminal of the present invention, it is possible to switch the pass band for an audio signal. During a call, a voice signal whose band is limited using the predetermined call band as a pass band is wirelessly transmitted. Identification processing is performed based on a voice signal that is band-limited using the voice band as a pass band. Therefore, it is possible to identify the emotion of the animal without deteriorating the sound quality in the transmitted sound during the call, and the convenience can be improved.

  Further, the second display means is provided on the opposite side of the operation surface directed to the animal side at the time of emotion recognition, and the display related to the identification processing is performed by the second display means, thereby easily confirming the end of the process in emotion identification. Therefore, visibility can be improved.

  Further, by turning off the first backlight of the first display means provided on the operation surface directed to the animal side at the time of emotion recognition, no ringing tone is output or no ringing vibration is given to the animal. Can be suppressed, and it is possible to mitigate giving alarm and fear to animals at the time of emotion identification.

Embodiment 1 FIG.
FIGS. 1A and 1B are diagrams showing an example of a mobile communication terminal according to Embodiment 1 of the present invention, and a foldable mobile phone 1 that can identify animal emotions from animal calls. The appearance is shown. (A) in the figure shows the operation surface side of the mobile phone 1, that is, the inner side with the foldable shape opened, and (b) shows the sub-display with the foldable shape closed. 5 mounting side is shown.

  The mobile phone 1 includes a receiver housing 1 a having a receiver 7 having a receiver 7 and a transmitter housing 1 b having a microphone (hereinafter referred to as a microphone) 2, and is operated by a hinge 18. It can be folded with the side facing inward.

  A receiver 7 for outputting a received sound during a call and a main display (first display means) 4 for displaying a telephone number and the like are provided on the operation surface side of the receiver housing 1a. . The main display 4 is a liquid crystal display including a first liquid crystal panel 4a that performs screen display and a first backlight 4b that illuminates the display screen.

  A microphone 2 for inputting voice and a first operation input unit 3 including various operation keys are provided on the operation surface side of the transmitter unit housing 1b. The microphone 2 is a voice input unit that converts voice into an electrical signal and outputs it as a voice signal, and a speech sound or animal call is input. Here, the sound produced by pets such as dogs and cats is called animal crying, and is distinguished from the voice (speech sound) produced by a person. The first operation input unit 3 includes a dial key 3a for the user to input a telephone number, an off-hook key 3b for the user to perform a call operation and an incoming call response operation, and an on-hook for the user to perform a call end operation. Operation keys such as a key 3c are provided.

  On the side of the receiver housing 1a where the sub-display 5 is mounted, that is, on the opposite side of the operation surface, a sub-display (second display means) 5 for displaying an incoming notification message when the housing is folded, A digital camera 15 for photographing a subject, a mobile light 16 for emitting light to illuminate the subject at the time of photographing, and an operation key 17 for a user to perform an incoming call operation when the casing is folded are provided. Yes. The sub-display 5 is a small liquid crystal display including a second liquid crystal panel 5a that performs screen display and a second backlight 5b that illuminates the display screen.

  A side key (second operation input means) 6 for the user to perform a shutter operation is provided on the side surface of the transmitter section housing 1b.

  Normally, when carrying the mobile phone 1, the terminal housing is folded. At this time, the main display 4 and the receiver 7, and the microphone 2 and the first operation input unit 3 are housed so as to face each other. That is, the incoming notification message is displayed and the second backlight 5b is turned on. The second backlight 5b is also turned on by a key operation when the casing is folded, and is turned off when a predetermined lighting time has elapsed. In addition, the mobile light 16 is turned on or blinked to notify an incoming call.

  Further, when making a call or answering an incoming call, the terminal case is expanded, and a call operation or an incoming call response operation is performed in the case where the case is expanded. By unfolding the terminal housing, the first backlight 4b of the main display 4 is turned on, and the second backlight 5b of the sub display 5 is turned off. In this state, for example, when a call operation is performed, the operation state of the user such as a dialed telephone number is displayed on the main display 4. The first backlight 4b is also turned on by a key operation when the casing is expanded, and is turned off when a predetermined lighting time has elapsed. When the housing is unfolded, the main display 4 is normally used for display, so that the second backlight 5b is not turned on even by a key operation and is kept off.

  When the user performs animal emotion identification using such a mobile phone 1, the user shifts to an identification mode for performing emotion identification by a key operation in the first operation input unit 3. Then, in order to input the animal call to the microphone 2, the operation surface is directed to the animal side in the unfolded state of the casing. If the side key 6 is operated in this state, the identification process can be started based on this key operation. When the identification process is started, band limitation suitable for animal singing is performed, and animal emotions are discriminated based on a voice signal digitized at a higher sampling frequency (sampling rate) for crying than during a call. .

  At this time, the first backlight 4b of the main display 4 is turned off and the second backlight 5b of the sub display 5 is turned on based on a user operation for instructing the identification process. That is, during the identification process, an operation different from normal is performed with respect to lighting of the backlight. Here, based on the key operation of the side key 6 for starting the identification process, the first backlight 4b is turned off and the second backlight 5b is turned on to display the progress of the identification process. Thereafter, when the identification process is completed, a character message or an animation image indicating the completion of the process is displayed on the sub display 5 and the mobile light 16 is lit or blinked. The determined animal emotion is displayed on the main display 4 by a character message or an animation image as an identification result.

  When an incoming call is received during the identification process, an incoming call notification message for notifying the incoming call is displayed on the sub-display 5 and the mobile light 16 is lit or blinked.

  FIG. 2 is a diagram showing an example of inputting an animal call to the mobile phone of FIG. 1, and shows a state where the operation surface of the mobile phone 1 is directed to the dog side. When the user inputs the dog's cry to the microphone 2, the operation surface provided with the microphone 2 is directed toward the dog's mouth when the housing is unfolded. When the side key 6 is operated in this state, the dog emotion recognition process is started and an animal call is input.

  Since the side key 6 is provided on the side surface of the terminal housing, it can be easily operated even when the operation surface faces the dog side, and the identification process can be started. In addition, since the end display of the identification process is performed on the sub-display 5 provided on the opposite side of the operation surface, the end of the process can be easily confirmed even when the operation surface is directed to the dog side. Furthermore, since the first backlight 4b of the main display 4 provided on the operation surface directed to the dog side is turned off at the time of emotion identification, the visual stimulus is suppressed, and the dog is wary and fearful. Can be reduced. That is, it is possible to identify the emotion of the animal without being surprised by the animal to be identified.

  Note that if the microphone 2 is too far from the dog's mouth, the attenuation of the high-frequency range increases, and if the distance A between the microphone 2 and the dog is large, the influence of noise increases. For this reason, in order to improve the identification accuracy, it is preferable to keep the distance A at about 50 cm when inputting animal calls.

  FIG. 3 is a block diagram showing an example of the configuration inside the mobile phone of FIG. In the figure, 2 is a microphone, 3 is a first operation input unit, 4 is a main display, 5 is a sub-display, 6 is a side key, 7 is a receiver, 8 is a variable filter, 9 is an amplifier, 10 is an A / A for calling A D conversion unit, 11 is an A / D conversion unit for crying, 12 is an emotion identification processing unit, 13 is a wireless communication processing unit, 14 is a CPU, and 16 is a mobile light. In the mobile phone 1 according to the present embodiment, the pass band for the audio signal can be switched, and emotion identification is performed based on the audio signal band-limited using the cry band as the pass band. Here, the frequency band of the animal cry required for emotion identification is called the cry band, and is distinguished from the call band corresponding to the frequency band of the uttered sound. In addition, the same code | symbol is attached | subjected to the block corresponded to the component shown by FIG.

  The wireless communication processing unit 13 is a transmission / reception unit that wirelessly transmits a transmission sound to a communication partner via a mobile communication network and receives a reception sound from the communication partner, and performs transmission processing, reception processing, and communication processing. ing. During a call, the band is limited by the call band, and an audio signal digitized at a predetermined call sampling frequency is input from the CPU 14 and wirelessly transmitted as a transmitted sound.

  The variable filter 8 is a band limiting unit that can switch a pass band for an audio signal based on an operation input by a user, and includes a band pass filter. The variable filter 8 switches and selects a predetermined call band and voice band as a pass band, and limits the band of the audio signal input from the microphone 2 by the selected pass band.

  The switching of the pass band is performed based on an operation input in the first operation input unit 3 and is executed according to an instruction from the CPU 14. That is, a band limiting process is performed in which the call band is a pass band during a call and the voice band is a pass band in an identification mode. As a result, appropriate band limitation can be performed in accordance with the audio signal, so that noise can be effectively removed. Here, it is assumed that a frequency band that is widened to the high sound side and widened to the low sound side is used as the voice call band. For example, 700 Hz to 3.3 kHz is used for the call band, while 100 Hz to 8 kHz is used for the voice band when the identification target is a dog. As a result, it is possible to accurately identify emotions for animal calls characterized by frequency components in a wider band than the call band. In addition, by expanding the voice band toward the low sound side, accurate emotion identification can be performed even in the case of a large dog having a voice characteristic at 100 to 200 Hz.

  The amplifier 9 is an amplifying means for amplifying the power of the audio signal after band limitation by the variable filter 8, and is composed of an operational amplifier. The amplified audio signal is output to the calling A / D converter 10 and the screaming A / D converter 11.

  The call A / D converter 10 is a conversion means for converting the amplified audio signal into a digital signal at a predetermined call sampling frequency, and is configured by AGC. An AGC (Auto Level Gain Controller) performs gain adjustment on the audio signal based on an instruction from the CPU 14. This gain adjustment is performed by reducing the gain of an audio signal whose input level exceeds a predetermined threshold. As the call sampling frequency, 8 kHz is used corresponding to the call band.

  The sounding A / D converter 11 is conversion means for converting the amplified sound signal into a digital signal at a sounding sampling frequency higher than the call sampling frequency. The voice A / D converter 11 is also configured by AGC, and gain adjustment based on an instruction from the CPU 14 is performed on the audio signal. The sounding A / D converter 11 is an A / D converter for digitizing a sound signal for music recording or voice memo input from a line input terminal, and a sampling frequency for sounding is 16 kHz. Is used. By using such an A / D converter for line input as the voicing A / D converter 11 for digitizing an audio signal generated by animal voicing, the voice is sampled at a sampling frequency higher than the sampling frequency for calling. Since the signal can be sampled, emotion identification based on animal calls can be performed more accurately.

  The emotion identification processing unit 12 is an emotion identification unit that performs frequency analysis in the voice band on an audio signal band-limited by the voice band, and identifies an animal's emotion based on the analysis result. The emotion identification processing unit 12 includes an audio pattern extraction unit 12a, a comparison unit 12b, and an emotion-specific audio pattern storage unit 12c. Emotion identification is performed based on a voice signal that is band-limited by the variable filter 8 using the voice band as a pass band and digitized by the voice A / D converter 11.

  The voice pattern extraction unit 12a obtains the frequency distribution of animal calls in time series based on the voice signal input from the A / D conversion unit 11 for voice via the CPU 14, and performs two-dimensional analysis on the frequency axis and the time axis. Are extracted as input voice patterns. The comparison unit 12b compares the extracted input voice pattern and the emotion-specific voice pattern stored in the emotion-specific voice pattern storage unit 12c, and determines the emotion-specific voice pattern having the highest correlation with the input voice pattern. In this way, the emotions of the animals are identified, and the identification results are displayed on the main display 4 as text messages or animation images. These display contents are displayed until the side key 6 is operated next time.

  In the emotion-specific voice pattern storage unit 12c, voice patterns for various emotions of animals are stored in advance as emotion-specific voice patterns. Here, it is assumed that a voice pattern is stored in association with each emotion of “loneliness”, “frustration”, “intimidation”, “self-expression”, “fun”, and “request”. In addition, as such databases, three databases for large dogs, medium dogs, and small dogs having different frequency distributions are provided and can be selected by the user when shifting to the identification mode. This makes it possible to select and specify an appropriate database according to the animal to be identified, so that the identification accuracy can be improved.

  The identification process is started based on the key operation of the side key 6, and when the identification process is completed, the process end is displayed on the sub display 5. The end of the process is notified by displaying a text message or an animation image. The notification is also made by turning on or blinking the mobile light 16. Thereby, even if the operation surface is directed to the animal side in order to input the animal call to the microphone 2, the user can easily confirm the end of the emotion identification process.

  Further, the first backlight 4b is turned off based on a user operation for starting the identification process. By turning off the first backlight 4b of the main display 4 provided on the operation surface directed toward the animal side at the time of emotion recognition, the animal is wary and fearful during the identification process. Can be reduced. That is, since it is possible to reduce the stimulus to the vision of the animal that is the identification target, it is possible to perform the identification process without surprise the animal. Furthermore, since the first backlight 4b can be automatically turned off based on a user operation for starting the identification process, power consumption can be reduced.

  The main display 4 turns on the first backlight 4b based on the end of the identification process according to an instruction from the CPU 14. Thereby, the user can easily confirm the identification result displayed on the main display 4. In addition, after the start of the identification process, the first backlight 4b can be turned on based on an operation input by the user. Thereby, the user can easily confirm the display content of the main display 4 as necessary.

  FIG. 4 is a circuit diagram showing a configuration example of a main part of the mobile phone shown in FIG. 3, in which a variable filter 8 and an amplifier 9 are shown. The variable filter 8 includes two capacitors 22 and 23, and these capacitors 22 and 23 are connected in parallel. A changeover switch 21 is provided on the input side of one capacitor 22. The other capacitor 23 is a capacitor having an appropriate capacitance to limit the band of the audio signal with the speech band as a pass band, and is also a filter for cutting a DC component in the audio signal.

  When the changeover switch 21 is turned on / off based on an operation input by the user and is turned off in accordance with an instruction from the CPU 14, the variable filter 8 becomes a filter having a call band as a pass band. On the other hand, when in the on state, the variable filter 8 is a filter whose pass band is a voice call band including a lower sound range than the call band. In this way, the pass band of the audio signal from the microphone 2 can be switched.

  The amplifier 9 includes an electrical resistor 25, a capacitor 26, and an operational amplifier 27, and the electrical resistor 25 and the capacitor 26 are connected in parallel to the input / output terminal of the operational amplifier 27. The negative terminal of the operational amplifier 27 is an input terminal for an audio signal input from the variable filter 8 via the electric resistor 24, and a reference potential is applied to the positive terminal. The amplification factor in the amplifier 9 can be determined by the resistance values of the electric resistors 24 and 25, and oscillation can be prevented by the capacitor 26. The voice signal whose power is amplified by the amplifier 9 is output to the calling A / D converter 10 and the screaming A / D converter 11.

  FIG. 5 is a circuit diagram showing a configuration example of a main part of the mobile phone shown in FIG. 3, and shows a configuration having an external microphone input terminal 33 and a line input terminal 34. The external microphone input terminal 33 is a terminal for inputting an audio signal from an external microphone such as a handset. The output of the external microphone input terminal 33 and the output of the microphone 2 are alternatively selected by the changeover switch 31. And transmitted to the variable filter 8. The line input terminal 34 is a terminal for inputting an audio signal for music recording or voice memo. The output of the line input terminal 34 and the output of the variable filter 8 are alternatively selected by the changeover switch 32. And is transmitted to the A / D converter 11 for crying. By using the A / D converter used for such music recording as the sounding A / D conversion unit 11 to digitize the sound signal of the animal sound, a sampling frequency higher than the sampling frequency for the call is obtained. Since the voice signal can be sampled by the emotion, the emotion identification based on the animal call can be performed more accurately.

  Steps S101 to S109 in FIG. 6 are flowcharts showing an example of emotion recognition operation in the mobile phone in FIG. First, when the identification mode is selected by the user during standby, the mode is shifted to the identification mode based on this operation input (steps S101 and S102). Next, the user points the operation surface of the mobile phone 1 toward the animal side and operates the side key 6 to start the identification process. Identification processing is started based on this key operation (step S103). At this time, the first backlight 4b of the main display 4 is turned off.

  When the identification process is started, an animal call is input from the microphone 2, and band limitation is performed on the input voice signal so that the call band is a pass band (steps S104 and S105). The audio signal after the band limitation is digitized by the screaming A / D converter 11 and emotion discrimination processing is performed based on the digitized audio signal (steps S106 and S107). Such identification processing is repeated until an identification result is obtained, and when the identification result is obtained, the end of the process is displayed on the sub-display 5 (steps S108 and S109). At this time, the first backlight 4b of the main display 4 is turned on, and the identification result is displayed.

  According to the present embodiment, the pass band for the audio signal can be switched based on an operation input by the user, and emotion identification is performed based on the audio signal that is band-limited using the vocal band as the pass band. Therefore, it is possible to suppress degradation of sound quality by restricting the bandwidth to the passband during a call, and to suppress emotion identification accurately by restricting the voiceband to the passband when identifying emotions of animals. Can be done. In particular, the emotional band can be accurately identified even if animal voices characterized by frequency components lower and higher than the speech bandwidth are input by making the speech bandwidth wider than the speech bandwidth. It can be performed. In addition, since the pass band of the variable filter 8 is switched to the call band during a call, it is possible to prevent an increase in the low-pitched sound and prevent the occurrence of high-frequency noise.

  In the present embodiment, an example in which the first backlight 4b of the main display 4 is turned off during the identification process has been described. However, the present invention is not limited to this. Anything that suppresses surprise of the animal by stimulating the animal's vision during the identification process may be used. For example, during the identification process, the first backlight 4b may be turned off and the text message displayed on the first liquid crystal panel 4a may be turned off, or power supply to the main display 4 may be performed. It may be something that stops.

Embodiment 2. FIG.
FIG. 7 is a block diagram showing an example of the internal configuration of a mobile phone according to Embodiment 2 of the present invention. The mobile phone 40 according to the present embodiment is different from the mobile phone 1 (Embodiment 1) of FIG. 3 in that it includes a ringtone output unit 41 and a vibrator 42. The cellular phone 40 is controlled so as not to output a ringtone and perform ringing vibration during the process of animal emotion identification.

  The ring tone output unit 41 is a speaker that outputs a ring tone when receiving a call, and is provided on the opposite side of the operation surface. The ring tone output unit 41 does not output a ring tone based on an instruction from the CPU 14 when the identification process is being performed. The vibrator 42 is an incoming vibration unit that is driven when an incoming call is received and performs incoming vibration. The vibrator 42 also does not perform incoming vibration based on an instruction from the CPU 14 when the identification process is being performed. When an incoming call is received during the identification process, an incoming call notification message for notifying the incoming call is displayed on the sub-display 5 and the mobile light 16 is lit or blinked.

  According to the present embodiment, since the ringtone output and the incoming vibration are stopped while the identification process is being performed, the animals are surprised by stimulating the hearing of the animal by the incoming call during the identification process. Can be prevented.

  In the first and second embodiments, the example in which the identification process is started by the key operation of the side key 6 has been described. However, the present invention is not limited to this. For example, the identification process may be automatically started when an audio signal having an intensity exceeding a predetermined threshold is input during the identification mode. In this case, if the audio signal input exceeding the predetermined threshold is a ring tone by the local station terminal, an identification error is displayed and a message to that effect is displayed. Further, the identification process may be started by the key operation of the operation key 17 provided together with the sub display 5 on the opposite side of the operation surface.

It is the figure which showed an example of the portable communication terminal by Embodiment 1 of this invention. It is the figure which showed an example in the case of inputting an animal call to the mobile telephone of FIG. 1, and shows a mode that the operation surface of the mobile telephone 1 is facing the dog side. FIG. 2 is a block diagram illustrating an example of a configuration inside the mobile phone in FIG. 1. FIG. 4 is a circuit diagram illustrating a configuration example of a main part of the mobile phone in FIG. 3. FIG. 4 is a circuit diagram illustrating a configuration example of a main part of the mobile phone in FIG. 3. 4 is a flowchart showing an example of emotion identification operation in the mobile phone of FIG. 3. It is the block diagram which showed the example of 1 structure inside the mobile telephone by Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,40 Mobile phone 1a Earpiece part housing | casing 1b Transmitter part housing | casing 2 Microphone 3 First operation input part 3a Dial key 3b Off-hook key 3c On-hook key 4 Main display 4a First liquid crystal panel 4b First backlight 5 Sub-display 5a Second liquid crystal panel 5b Second backlight 6 Side key 7 Receiver 8 Variable filter 9 Amplifier 10 A / D converter 11 for call 12 A / D converter 12 for voice Emotion identification processor 12a Voice pattern extraction Unit 12b comparison unit 12c emotion-specific voice pattern storage unit 13 wireless communication processing unit 14 CPU
15 Digital Camera 16 Mobile Light 17 Operation Key 18 Hinge Part 33 External Microphone Input Terminal 34 Line Input Terminal 41 Ring Tone Output Part (Speaker)
42 Vibrator

Claims (10)

Voice input means for converting speech sounds and animal calls into electrical signals and outputting them as voice signals;
A band limiting means for switching a voice band obtained by adding a predetermined call band and a lower frequency band to the call band as a pass band, and for limiting the band of the audio signal according to the selected pass band;
A transmission means for wirelessly transmitting a voice signal band-limited by the call band as a transmission sound;
A mobile communication terminal comprising: an emotion identification unit that performs frequency analysis in a voice band for the voice signal band-limited by the voice band and identifies an animal's emotion based on the analysis result. A / D conversion means for calling that converts the audio signal band-limited by the calling band to a digital signal at a predetermined call sampling frequency;
A voice A / D conversion means for converting the voice signal band-limited by the voice band into a digital signal at a voice sampling frequency higher than the voice sampling frequency;
The transmission means wirelessly transmits the voice signal digitized by the call A / D conversion means,
2. The mobile communication terminal according to claim 1, wherein the emotion identification unit performs emotion identification based on the voice signal digitized by the screaming A / D conversion unit. A terminal housing in which the voice input means is provided on the operation surface;
A first operation input means provided on an operation surface of the terminal housing and including operation keys for a user to perform a call operation;
A first display means provided on an operation surface of the terminal housing and displaying a user operation state at the time of a call operation;
The mobile communication terminal according to claim 1, further comprising: a second display unit that is provided on a side opposite to the operation surface of the terminal housing and that performs display related to the identification process by the emotion identification unit. A terminal housing that can be folded with the operation surface provided with the voice input means inside;
A first operation input means provided on an operation surface of the terminal casing and including operation keys for a user to perform an operation input when the casing is expanded;
A first display means provided on the operation surface of the terminal housing and displaying when the housing is unfolded;
Provided on the opposite side of the operation surface of the terminal housing, and a second display means for displaying when the housing is folded,
The emotion identification means executes identification processing when the casing is deployed,
The portable communication terminal according to claim 1, wherein the second display unit performs display related to the identification process. The first display means comprises a first liquid crystal panel and a first backlight;
The mobile communication terminal according to claim 3 or 4, wherein the first backlight is turned off based on a user operation for instructing an identification process. The second display means comprises a second liquid crystal panel and a second backlight;
The mobile communication terminal according to claim 3 or 4, wherein the second backlight is turned on based on a user operation for instructing an identification process. A ring tone output means for outputting a ring tone based on the operating state of the emotion identification means when receiving a call;
The mobile communication terminal according to claim 3 or 4, wherein the ring tone output means does not output a ring tone during the identification processing by the emotion identification means. Driven based on the operating state of the emotion identification means at the time of an incoming call, provided with a vibration means for vibrating the incoming call,
The mobile communication terminal according to claim 3 or 4, wherein the vibration means does not perform incoming vibration during the identification processing by the emotion identification means.   5. The mobile communication terminal according to claim 3, wherein when there is an incoming call during the identification process by the emotion identification unit, the transmission source information is displayed on the second display unit. A second operation input means provided on a side surface of the terminal housing;
The mobile communication terminal according to claim 3 or 4, wherein the emotion identification means starts identification processing based on an operation input in the second operation input means.

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