JPH1051516A - Ring back tone generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily report the termination of a call by changing the frequency characteristics or the like of a ring back tone adaptively to a peripheral environment by detecting sounds of the peripheral environmental at that place and executing processing, corresponding to that sound to a source sound when a call terminate signal is detected. SOLUTION: When the call terminate signal is detected by an RF circuit A1 including an antenna, the sounds in the peripheral environmental around a portable telephone A is inputted to a ring back tone generator C0 by a microphone A2. Next, the strength of signals at respective frequencies is operated and outputted as an environmental sound filter coefficient by an environmental sound filter coefficient operation part 1. Then, at a filter coefficient selecting part 3, the environmental sound filter coefficient is compared with (n) filter coefficients registered in a filter coefficient table 2 and having different frequency characteristics and a filter coefficient, of which the frequency characteristics are most different from the environmental sound filter coefficient, is selected. Then, a source sound signal is inputted to a filter 4 of which the filter coefficient is determined, and a calling signal having the frequency characteristics most different from the environmental sound is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ring tone generator, and more particularly, to a ring tone frequency characteristic and the like adapted to the surrounding environment even in a surrounding environment where it is difficult to identify the ring tone due to noise or the like. And a ring tone generation device that improves the distinction of the ring tone.

[0002]

2. Description of the Related Art In recent years, mobile phones, which are rapidly increasing in users, are different from conventional stationary telephones which are intended to be used indoors. That is. That is, in the case of the mobile phone, the place where the incoming call is received is not constant, so that the audibility of the ringing tone changes extremely depending on the surrounding environment at the time of the incoming call. Further, the person who hears the ringing tone emitted from the mobile phone is also unspecified, and the ringing tone may be a nuisance to the surroundings. Thus, how to determine the type of ringing tone cannot ignore the relationship with the surrounding environment. For example, the following (1) to (4) roughly categorize ring tones used in existing mobile phones. (1) Use music as a ringing tone. (2) A pure tone (a tone having only a single frequency) is used as a ringing tone. (3) Overtones (sounds composed of a fundamental wave and its harmonics) are called ringing sounds. (4) A pure tone or an overtone is intermittently transmitted, and this is set as a ringing tone. In some cases, the user can arbitrarily select any of the above-mentioned ring tones (1) to (4).

[0003] The ringing sounds of the above (1) to (4) are:
(1 m) to (4 m). (1m) An incoming call can be transmitted to the user and the environment surrounding the user by a sound that is not bothersome. (2m) Since the pure tone has good sound, the incoming call is easily transmitted to the user. (3m) Pure sound can be made somewhat comfortable. (4m) Without changing the frequency characteristics of the ringing tone,
It is easier to convey than simply using pure tones or harmonics. As described above, any of the ring tones (1) to (4) has an advantage according to the characteristics of the signal. On the other hand, (1
d) to (4d) also have the following disadvantages. (1d) The listening comfort is good, but the incoming call is not easily transmitted. (2d) Pure sounds are difficult for human hearing to sense the direction, and thus tend to be annoying to the environment around the user. For example, there is a case where a large number of passengers simultaneously take out their mobile phones when one mobile phone starts ringing in the Shinkansen. (3d) An incoming call is harder to reach than a pure tone. (4d) The user is likely to notice the incoming call because of the intermittent operation, but it is likely to be annoying to the usage environment.

[0004]

As described above, conventional ring tones have advantages and disadvantages and cannot respond to changes in the use environment. Even if the surrounding environment changes, it can be heard well,
In order to satisfy the conditions required for a general ringing tone, such as not disturbing the surroundings and being comfortable to hear, it is necessary to satisfy the following requirements (A1) to (A5) according to changes in the surrounding environment. Becomes (A1) It is easy to distinguish from environmental sounds. (A2) A ring tone that is easy for only the user or a specific person to hear. (A3) The volume should be minimal so as not to bother others. (A4) Sound with good direction discrimination. (A5) The listening comfort varies from person to person, and even some individuals change depending on their health status.
The ring tone is adjustable. In order to solve the problems in the prior art, the present invention improves the ringing tone generation device, changes the frequency characteristics of the ringing tone to adapt to the surrounding environment, and allows incoming calls regardless of the surrounding environment. It is an object of the present invention to provide a ring tone generating device capable of generating a ring tone to be easily notified.

[0005]

According to a first aspect of the present invention, when an incoming signal is detected, a call signal obtained by subjecting a predetermined source sound signal to predetermined processing is continuously or intermittently transmitted. In a ring tone generation device for generating a ring tone by inputting to a loudspeaker, when an incoming signal is detected, an environmental sound at that place is detected, and a process corresponding to the environmental sound is performed on the source sound to obtain an environmental sound. By generating a ringing signal corresponding to the ringing tone, the ringing tone is changed according to the environmental sound. For this reason, even in a use environment where it is difficult to identify with a conventional ring tone due to noise or the like, it is possible to change the ring tone according to the use environment and reliably notify the user of the incoming call.

[0006] As a method of generating a call signal, a filter whose filter coefficient can be changed is provided between a drive source of a speaker for generating the call signal from the source sound signal and the speaker, and the environment is improved. The process according to the sound can be a process of changing the filter coefficient of the filter according to the environmental sound. In addition, since the ringing tone can be recognized for the user, the volume of the ringing tone can be reduced, which does not disturb the surrounding people and saves labor. Further, in the ringing tone generating apparatus according to the first aspect of the present invention, the process of creating a ringing signal according to the use environment is performed by storing a plurality of filter coefficients each exhibiting a different frequency characteristic. Means and a filter coefficient selecting means for selecting a filter coefficient to be applied to the filter based on the environmental sound from among the filter coefficients stored in the filter coefficient storing means. The signal can be automatically adapted and selected for the usage environment.

[0007] Further, the environment sound input means for inputting the environment sound around the calling voice device immediately after the detection of the incoming call signal, and the environment sound input means, to the ring sound generation apparatus according to the first invention. Environmental sound filter coefficient calculating means for performing frequency analysis of the input environmental sound signal and calculating an environmental sound filter coefficient corresponding to the frequency characteristic of the environmental sound, wherein the environment calculated by the environmental sound filter coefficient calculating means is provided. If the sound filter coefficient is applied to the filter, the frequency characteristic of the ringing tone can be changed according to the surrounding environment at the time of the incoming call, and a ringing tone with higher discrimination than before can be generated. Further, when the source sound signal of the ringing signal generation device according to the first aspect of the invention is a signal having a preset frequency characteristic, a ringing sound can be generated according to a user's preference or the like. . Further, when the frequency characteristic of the source sound signal corresponds to white noise or pink noise, the user can easily recognize the place where the ringing tone is emitted. this is,
This is because the white noise or pink noise is a signal having high direction discrimination for human hearing.

According to a second aspect of the invention, when an incoming signal is detected, a ringing signal obtained by subjecting a predetermined source sound signal to predetermined processing is input to a speaker continuously or intermittently to generate a ringing sound. A ring tone generator for generating a ring signal by changing the frequency characteristic of the source tone signal, and a filter for outputting to the speaker and a voice signal of a user of the ring tone generator in advance. An audio signal registration unit, and a filter coefficient determination unit that performs frequency analysis of the audio signal registered in the audio signal registration unit and determines a filter coefficient of the filter based on the frequency analysis. As a ringing tone generating device. With this configuration, it is possible to generate a ringing tone having a frequency characteristic similar to that of the user's own voice, which is heard most frequently by the user, and to make it easier for the user to recognize the ringing tone. Therefore, it is possible to reduce the volume of the ringing tone, avoid troublesome surroundings, and save labor. Further, when the source sound signal of the ringing tone generating device according to the second invention is a signal having a preset frequency characteristic, it is possible to generate a ringing tone having a tone quality according to the user's preference, and Is easy to determine. Further, when the frequency characteristic of the source sound signal corresponds to white noise or pink noise, the distinctiveness of the direction of the ringing tone increases,
A ringing tone that is more easily recognized by the user can be generated.

The ringing tone generation device according to the third invention, when an incoming signal is detected, continuously or intermittently inputs a ringing signal obtained by subjecting a predetermined source sound signal to predetermined processing to a speaker. A ringing tone generating device for generating a ringing tone by performing an environmental sound inputting means for inputting a surrounding environment immediately after the detection of the incoming signal and a frequency analysis of the environmental sound input by the environmental sounding inputting means. Ringing sound generating means for changing the ringing sound volume based on the frequency characteristics of the environmental sound and / or the sound volume level of the environmental sound obtained by the frequency analysis. It is configured as a device.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The following embodiments embody the present invention and do not limit the technical scope of the present invention. FIG. 1 is a block diagram showing a schematic configuration of a ringer generating apparatus C0 according to an embodiment of the first invention.
Is a ring tone generation device C according to an embodiment of the second invention.
1 is a block diagram illustrating a schematic configuration of FIG. As shown in FIG. 1, a ringing tone generation device C0 according to an embodiment of the first invention is used for generating a ringing tone of a mobile phone A, performs a frequency analysis of environmental sounds around the mobile phone A, and An environmental sound filter coefficient calculating unit that calculates environmental sound filter coefficients based on frequency analysis; a filter coefficient table for storing a plurality of filter coefficients each exhibiting different frequency characteristics; It is composed of a filter coefficient selection unit 3 for selecting a filter coefficient to be applied to the filter 4 described later from among the stored filter coefficients, and a filter 4 whose feedback coefficient is variable. The same applies to the ringing tone generation device C1 described later.
The input of the environmental sound and the voice signal is performed by the microphone A2 of the mobile phone A. Further, the speaker A3 of the mobile phone A is used to output the ringing sound.

The operation of the ringing tone generator C0 is as follows. First, when an incoming signal is detected by the RF circuit A1 including an antenna, the microphone A2
The environmental sound around the mobile phone A is input to the ringing tone generator C0. After the A / D conversion, the environmental sound is input to the environmental sound filter operation unit 1. Next, in the environmental sound filter coefficient calculating unit 1, a frequency analysis such as a fast Fourier transform is performed on the environmental sound, and a signal strength at each frequency is calculated. In this embodiment, the signal strength is an environmental sound filter coefficient. On the other hand, n (n is a natural number) filter coefficients having different frequency characteristics are registered in advance in the filter coefficient table 2, and the environmental sound filter coefficient and the n frequency characteristics are stored in the filter coefficient selection unit 3. Is compared with each of the different filter coefficients.

The comparison between the environmental sound filter coefficient and the filter coefficient is performed, for example, according to the following processing procedure. It is assumed that the environmental sound filter coefficients at the frequencies f1 to fm are X = (x1, x2,..., Xm). Also,
Y1 = (y11, y12,..., Y1m) Y2 = (y21, y22,..., Y2m) for the n filter coefficients stored in the filter coefficient table 2 at the frequencies f1 to fm. ... Yn = (yn1, yn2,..., Ynm). Furthermore, the norm between each of the data Y1 to Yn and X is defined as follows. Z1 = sqrt ((x1-y11) ² + ... + (xm-y1m) ² ) Z2 = sqrt ((x2-y21) ² + ... + (xm-y2m) ² ) ... ··········· Zn = sqrt ((xn−yn1) ² +... + (Xm−ynm) ² ) Due to this norm, the above environmental sound A comparison is made between the filter coefficients and the filter coefficients. Next, the filter coefficient selection unit 3
In the above, among the filter coefficients stored in the filter coefficient table 2, the value of the norms Z1 to Zn is maximized, that is, the filter coefficient whose frequency characteristic is most different from the environmental sound filter coefficient is selected. Applied to the filter coefficients of filter 4.

Next, the source sound signal is input to the filter 4 for which the filter coefficient has been determined, and a call signal having the frequency characteristic that is the most different from the environmental sound is output. The output calling signal is output to the speaker A3, and a calling sound that is easy to recognize from the environmental sound is transmitted. As described above, the ringing tone generation device C0 generates a ringing tone whose frequency characteristic is most different from the environmental tone at the time of the incoming call, thereby improving the discrimination of the environmental tone as compared with the conventional ringing tone. Therefore, the volume of the ringing tone is reduced, and
Is applied, the power saving of the mobile phone A can be achieved. Also, it does not bother others.

Next, with regard to an embodiment of the second invention,
Explanation will be made based on FIG. As shown in FIG. 2, the ringing tone generator C1 according to one embodiment of the second invention is used for generating a ringing tone of the mobile phone A, similarly to the ringing tone generator C0, and is used in advance for the mobile phone A. Voice signal registration unit 21 for registering a voice signal of a user, voice signal registration unit 21
A filter coefficient determining unit 22 that determines the filter coefficient of the filter 22 described later by performing a frequency analysis of the audio signal registered in the mobile phone A by changing the frequency characteristic of the source sound signal It is composed of a filter 23 that outputs to the speaker A3.

In the ringing tone generator C1, a voice signal of the user of the portable telephone is input to the voice signal registration unit 21 through the microphone A2 in advance. The registered audio signal is output to the filter coefficient determination unit 22. still,
The voice signal is registered during a call or arbitrarily registered by a user separately from the call. In the filter coefficient determination unit 22, frequency analysis such as fast Fourier transform is performed on the audio signal, and the signal strength of each frequency is determined as a filter coefficient of the filter 23.
When a source sound signal such as music or a pure tone is input to the filter 23 in which the filter coefficient is determined, a calling signal similar to the frequency characteristic of the voice signal of the user, that is, a calling signal that is easy for the user to hear is generated. A paging signal having a frequency characteristic similar to that of the voice signal is output from the filter 23 to the speaker A.
3 and a ringing tone is generated. As described above, the frequency characteristic of the ringing tone generated by the ringing tone generation device C1 is similar to the voice signal of the user. Therefore, by making the frequency characteristics of the user's most frequently heard and learned voice signal and the ringing tone similar, the discriminability of the user is improved.

[0016]

[Embodiment] In the above embodiment, an example is shown in which a ring tone generation device is incorporated in a mobile phone A as a single device, but a digital signal processor (DSP), a ROM, and the like mounted on the mobile phone are provided. May be realized by using the storage means. A specific example of such a ringing tone generator C0 'will be described with reference to FIG. In this example, the ringing tone generator C0 'corresponding to the ringing tone generator C0 according to the above embodiment is realized by a digital signal processor (DSP) and storage means mounted on the mobile phone A'. . As shown in FIG. 3, an RF circuit A1 including an antenna, a DSP 31, a control microcomputer (MC
U) 32, microphone A2, speaker amplifier 33,
Speaker A3, A / D converter 34, D / A converter 35,
In the portable telephone A 'composed of the external ROM 36, the RAM 37, and the EEPROM 38, the main parts for realizing the ringing tone generator C0' are the DSP 31, the external R
OM 36 and RAM 37. Here, the voice compression / decompression program, control program, calling signal, environmental sound detection program, voice frequency band detection program, and filter pattern are stored in the external ROM 39.

The operation of the ringer C0 'is as follows. First, when an incoming signal is output to the DSP 31 by the RF circuit A1 including the antenna, the DSP 31
Calls an environment detection program stored in the external ROM 36, and outputs an instruction to the microphone A2 to capture environmental sounds around the mobile phone. The environmental sound input by the microphone A2 is converted into a digital signal by the A / D converter 34. The digital signal in this case is obtained, for example, by sampling at 8 kHz and quantizing at 8 bits. The digitized environmental sound is stored in the RAM 37. RAM by DSP31
A fast Fourier transform is applied to the environmental sound stored in 37. The environmental sound converted to the frequency information is stored in the RAM 37 again.
Is stored in The discrete signal strength for each frequency obtained by the fast Fourier transform is an environmental sound filter coefficient. Next, the DSP 31 compares the filter coefficient stored in the external ROM 36 in advance with the environmental sound filter coefficient stored in the RAM 37. Then, similarly to the above embodiment, the filter coefficient having the most different frequency characteristic is selected from the filter coefficients stored in the external ROM 36. The selected filter coefficient is
Called by the OM 36 to the DSP 31, the DSP 31 filters the source sound signal stored in the external ROM 36. The call signal whose frequency characteristics have been adjusted via the DSP 31 is converted into an analog signal by the D / A converter 35. The analogized calling signal is amplified by the speaker amplifier 33, and is output to the speaker A3.
And generates a ring tone.

As described above, the D mounted on the mobile phone is
It is also possible to realize the paging signal generation device of the present invention by using the SP or the like. In this case, there is no need to mount extra arithmetic means or the like on the mobile phone, and it is possible to generate a ringing tone with high discrimination with respect to the surrounding environment, which is an advantage of the ringing tone generation device. Such a ringing tone generator C0 'is also an example of the ringing tone generator of the present invention. Also, if white noise (white noise) or pink noise (signal obtained by subjecting white noise to an appropriate band-pass filter) is used as the source sound signal of the ringing tone generator, the ringing tone generator emits. It is possible to further improve the direction identification of the ringing tone. This is because a signal such as white noise or pink noise contains various frequency components, so that it is easy for human hearing to identify the direction. Such a ringing tone generation device is also an example of the ringing tone generation device in the present invention.

Further, when a call signal is obtained by adding an arbitrary signal to a source sound signal based on white noise or the like as a calling signal, the call signal depends on the user's personal easiness of hearing or listening comfort. The ringing tone can be changed. Such a ringing tone generation device is also an example of the ringing tone generation device in the present invention. Also, in the above embodiments and examples, the ringing tone generation device according to the present invention was used to generate a ringing tone for a mobile phone. It may be used to generate a signal sound to a person. Such a ringing tone generation device is also an example of the ringing tone generation device in the present invention.

In the above-described embodiments and examples, the frequency characteristic of the source sound signal is changed in accordance with the surrounding environment or in such a manner as to make it easier for the user to hear. By changing the volume of the ringing tone according to the frequency characteristics and / or the volume level of the environmental sound detected at the time of the incoming call, the recognition of the ringing tone may be ensured. In the above-described ringing tone generator that changes the volume, when an incoming call is detected, the surrounding environmental sound is obtained by sound input means such as a microphone, and the obtained environmental sound is subjected to frequency analysis such as fast Fourier transform. Done. The comparison between the frequency characteristics of the environmental sound obtained by the frequency analysis and the frequency characteristics of the source sound signal is performed based on, for example, the norm used in the calling voice device C0. As a result of this comparison, if, for example, the frequency characteristics of the environmental sound and the source sound signal are significantly different, the volume of the ringing tone is set to be low, and if the frequency characteristics of both are similar,
The volume of the ringing tone is set high. Note that the volume level is based on the volume level of the environmental sound. As described above, the ringing tone generation device that changes the volume can automatically generate a ringing tone having an appropriate volume according to the environment. Therefore, power consumption due to noise increase is suppressed, and it is hard to cause trouble for the surroundings. Of course, regardless of the frequency of the environmental sound, the loudness of the ringing tone may be simply changed according to the loudness of the environmental sound.

Further, if the frequency characteristics and the volume of the source sound signal are simultaneously changed, the distinction of the ringing tone is further improved. For example, the filter coefficient selection unit 3 of the ringing tone generator C0 determines not only the filter coefficient but also the volume of the ringing tone. By doing so, a ringing tone having good discrimination with respect to the environmental sound is automatically generated at an appropriate volume, so that it is easier for the user to confirm. For this reason, even in a loud noise factory or the like, a ringing tone having a volume comparable to the noise level can be obtained, and the usefulness of the ringing tone generator is further expanded. Also, the ringing tone generator C
A means for comparing the frequency characteristic of the environmental sound with the frequency characteristic of the source sound signal by using a norm or the like may be loaded so that the volume is automatically changed according to the environmental sound obtained by a microphone or the like at the time of incoming call. Good. Such a ringing tone generation device is also an example of the ringing tone generation device in the present invention.

[0022]

According to the first invention, when an incoming signal is detected,
A ringing tone generator that generates a ringing tone by continuously or intermittently inputting a ringing signal obtained by subjecting a predetermined source sound signal to a predetermined process to a speaker and detecting a ringing signal when an incoming signal is detected. A sound is detected, and a process according to the environmental sound is performed on the source sound to generate a call signal according to the environmental sound, so that the ring tone is changed according to the environmental sound. As a ringing tone generating device. For this reason, even in a usage environment where it is difficult to identify the
By changing the ringing tone according to the usage environment, the user can be reliably notified of the incoming call. As a method of generating a calling signal, a filter whose filter coefficient can be changed is provided between a driving source of a speaker that generates the calling signal from the source sound signal and the speaker, and the filter is adapted to respond to the environmental sound. Can be changed to a process of changing the filter coefficient of the filter according to the environmental sound. In addition, since the ringing tone can be recognized for the user, the volume of the ringing tone can be reduced, which does not disturb the surrounding people and saves labor.

Further, in the ringing tone generator according to the first aspect of the present invention, the process of creating a ringing signal according to the use environment is performed in advance by storing a plurality of filter coefficients each exhibiting different frequency characteristics. By performing the filter coefficient storing means and the filter coefficient selecting means for selecting a filter coefficient to be applied to the filter based on the environmental sound from the filter coefficients stored in the filter coefficient storing means, a desired frequency characteristic can be obtained. The held call signal can be automatically adapted to the use environment and selected. Further, the environmental sound input means for inputting the environmental sound around the ringing voice device immediately after the detection of the incoming signal and the environmental sound input means are input to the ringing sound generating apparatus according to the first invention. Environmental sound filter coefficient calculating means for performing frequency analysis of the environmental sound signal and calculating an environmental sound filter coefficient corresponding to the frequency characteristic of the environmental sound, wherein the environmental sound filter coefficient calculated by the environmental sound filter coefficient calculating means is provided. Is applied to the filter, the frequency characteristic of the ringing tone can be changed according to the surrounding environment at the time of the incoming call, and a ringing tone with higher discrimination than before can be generated. In the case where the source sound signal of the paging signal generation device according to the first invention is a signal having a preset frequency characteristic, according to the user's preference, etc.
A ring tone can be generated. Further, when the frequency characteristic of the source sound signal corresponds to white noise or pink noise, the user can easily recognize the place where the ringing tone is emitted. This is because the white noise or pink noise is a signal with high direction discrimination for human hearing.

According to a second aspect of the present invention, when an incoming signal is detected, a calling signal obtained by subjecting a predetermined source sound signal to predetermined processing is input to a speaker continuously or intermittently to generate a ringing sound. A ring tone generator for generating a ring signal by changing the frequency characteristic of the source tone signal, and a filter for outputting to the speaker and a voice signal of a user of the ring tone generator in advance. An audio signal registration unit, and a filter coefficient determination unit that performs frequency analysis of the audio signal registered in the audio signal registration unit and determines a filter coefficient of the filter based on the frequency analysis. As a ringing tone generating device. With this configuration, it is possible to generate a ringing tone having a frequency characteristic similar to that of the user's own voice, which is heard most frequently by the user, and to make it easier for the user to recognize the ringing tone. Therefore, it is possible to reduce the volume of the ringing tone, avoid troublesome surroundings, and save labor. Further, when the source sound signal of the ringing tone generating device according to the second invention is a signal having a preset frequency characteristic, it is possible to generate a ringing tone having a tone quality according to the user's preference, and Is easy to determine. Further, when the frequency characteristic of the source sound signal corresponds to white noise or pink noise, the distinctiveness of the direction of the ringing tone increases,
A ringing tone that is more easily recognized by the user can be generated.

The ringing tone generator according to the third aspect of the present invention, when an incoming signal is detected, continuously or intermittently inputs a ringing signal obtained by subjecting a predetermined source sound signal to predetermined processing to a speaker. A ringing tone generating device for generating a ringing tone by performing an environmental sound inputting means for inputting a surrounding environment immediately after the detection of the incoming signal and a frequency analysis of the environmental sound input by the environmental sounding inputting means. Ringing sound generating means for changing the ringing sound volume based on the frequency characteristics of the environmental sound and / or the sound volume level of the environmental sound obtained by the frequency analysis. It is configured as a device. For this reason, even in a loud factory, a construction site, or the like, a ringing tone having a volume not inferior to the noise level at that time is generated, which is very convenient for workers at the site. Of course, if the volume is changed and the frequency characteristic of the source sound signal is changed as in the first invention or the second invention, a ringing tone that is easier to hear is generated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a ring tone generation device C0 according to an embodiment of the first invention.

FIG. 2 is a block diagram showing a schematic configuration of a ringer generation device C1 according to an embodiment of the second invention.

FIG. 3 is a diagram illustrating a ringer C according to an embodiment of the present invention;
FIG. 2 is a block diagram showing a schematic configuration of 0 ′.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 ... Environmental sound filter coefficient calculation part 2 ... Filter coefficient table 3 ... Filter coefficient selection part 4 ... Filter concerning ringing sound generation apparatus C0 21 ... Voice signal registration part 22 ... Filter Coefficient determination unit 23: Filter related to ringing tone generation device C1, A ', mobile phone A1, RF circuit A2, microphone A3, speaker 31, DSP 32, MCU 33 ... Speaker amplifier 34 ... A / D converter 35 ... D / A converter 36 ... External ROM 37 ... RAM 38 ... EEPROM

Claims (10)

[Claims] 1. A ringing tone generating apparatus for generating a ringing tone by continuously or intermittently inputting a ringing signal obtained by subjecting a predetermined source sound signal to predetermined processing when an incoming signal is detected. , When an incoming signal is detected, the environment sound of the place is detected, and a process according to the environment sound is performed on the source sound to generate a call signal according to the environment sound.
A ring tone generation device, wherein the ring tone is changed according to the environmental sound. 2. A loudspeaker which is provided between a drive source of a speaker for generating the calling signal from the source sound signal and the speaker,
2. The ring tone generating apparatus according to claim 1, further comprising a filter whose filter coefficient is changeable, wherein the process according to the environmental sound is a process of changing a filter coefficient of the filter according to the environmental sound. 3. A filter coefficient storage means for storing a plurality of filter coefficients each exhibiting a different frequency characteristic, and a filter coefficient stored in said filter coefficient storage means, said filter coefficient being stored in said environmental sound. 3. A ring tone generating apparatus according to claim 2, further comprising: a filter coefficient selecting means for selecting a filter coefficient to be applied to said filter in response to said request. 4. An environment sound input means for inputting an environment sound signal around the calling voice device immediately after the detection of the incoming signal, and a frequency analysis of the environment sound signal input by the environment sound input means. 4. An environmental sound filter coefficient calculating means for calculating an environmental sound filter coefficient corresponding to a frequency characteristic of the environmental sound, wherein the environmental sound filter coefficient calculated by the environmental sound filter coefficient calculating means is applied to the filter. A ring tone generation device as described in the above. 5. The ringing tone generating apparatus according to claim 1, wherein said source tone signal is a signal having a preset frequency characteristic. 6. The frequency characteristic of the source sound signal corresponds to white noise or pink noise.
A ring tone generation device as described in the above. 7. A ringing tone generating apparatus for generating a ringing tone by continuously or intermittently inputting a ringing signal obtained by subjecting a predetermined source sound signal to predetermined processing to a speaker when an incoming signal is detected. A filter for generating a calling signal by changing the frequency characteristic of the source sound signal and outputting the generated calling signal to the speaker; and a sound signal registering means for registering a sound signal of a user of the calling sound generation device in advance. , Performs a frequency analysis of the audio signal registered in the audio signal registration means,
A ring tone generating apparatus comprising: a filter coefficient determining means for determining a filter coefficient of the filter based on the frequency analysis. 8. The ringing tone generator according to claim 7, wherein said source tone signal is a signal having a preset frequency characteristic. 9. The frequency characteristic of the source sound signal corresponds to white noise or pink noise.
A ring tone generation device as described in the above. 10. A ringing tone generating apparatus for generating a ringing tone by continuously or intermittently inputting a ringing signal obtained by subjecting a predetermined source sound signal to predetermined processing to a speaker when an incoming signal is detected. Immediately after the detection of the incoming signal, environmental sound input means for inputting a surrounding environment and frequency analysis of the environmental sound input by the environmental sound input means are performed.
Frequency characteristics of the environmental sound obtained by the frequency analysis and / or
Alternatively, there is provided a ring tone generation device comprising: a sound volume changing unit that changes the volume of the ring tone based on the volume level of the environmental sound.