JPWO2007097143A1 - Telephone response device and telephone response method - Google Patents

Abstract

The telephone response device includes environment information acquisition means, telephone connection means, and response control means. The environmental information acquisition means acquires environmental information that is information related to the environment around the mobile object. The telephone connection means is connected to a telephone in the mobile body. The response control means determines whether or not it is possible to respond to the incoming call to the telephone based on the environmental information. If it is determined that the response is possible, the response control means permits the response to the incoming call to the telephone and If it is determined that the call cannot be made, an utterance process is performed to notify that the incoming call to the telephone cannot be answered. By doing in this way, the danger of the accident which generate | occur | produces when a driver is distracted by the answer to a telephone can be reduced, and safety can be improved more.

Description

  The present invention relates to a telephone answering device having a hands-free function.

  2. Description of the Related Art Conventionally, a telephone answering device having a hands-free function capable of making a call without having to hold a telephone by hand has been proposed. In particular, with the recent popularization of mobile phones, there is a telephone answering device having a hands-free function of a type to which a mobile phone is attached. It is considered. Recently, some navigation devices that display map information within a predetermined range centering on the current position of a moving body such as a vehicle have also functioned as a telephone answering device having this hands-free function. Thus, even when the user is driving the vehicle, it is possible to answer the telephone. However, when a user answers a phone call while driving, it may be dangerous depending on the driving situation. Therefore, in the technique described in Patent Document 1, it is determined whether or not the user can respond by obtaining the driving situation of the user from the vehicle data.

  However, the technique described in Patent Document 1 has a problem that the environment in which the vehicle is actually traveling is not taken into consideration. For example, even if the vehicle is stopped or running at a low speed, if the vehicle is in a traffic jam, the user is distracted by driving at a low speed while making a phone call. There was a problem that there was a risk of contact with other vehicles.

  In addition, even when there is a passenger, if it is determined that the driving user cannot respond, the passenger cannot respond even if the passenger can answer the phone. was there.

  Furthermore, even when the driver is in a state where he / she can answer during a call, there is a problem that the driver can continue the call and falls into a dangerous state.

Japanese Patent Laid-Open No. 10-294965

  Examples of problems to be solved by the present invention include the above. It is an object of the present invention to provide a telephone answering device that is safer and easier to use.

  The invention according to claim 1 is a telephone answering device, environment information acquisition means for acquiring environment information as information about the environment around the mobile body, and telephone connection means for connecting to the telephone in the mobile body Response control means for performing response control on incoming calls to the telephone based on the environmental information, and the response control means can respond to incoming calls to the telephone based on the environmental information If it is determined that the response is possible, the response to the incoming call to the telephone is permitted. If the response is determined to be impossible, the response to the incoming call to the telephone is made. It is characterized by performing an utterance process informing that it is impossible.

  Invention of Claim 5 is a telephone response method, Comprising: The environment information acquisition process for acquiring the environmental information which is the information regarding the environment around a moving body, The telephone connection process connected with the telephone in the said mobile body, A response control step for performing response control for incoming calls to the telephone based on the environmental information, wherein the response control step can respond to incoming calls to the telephone based on the environmental information If it is determined that the response is possible, the response to the incoming call to the telephone is permitted. If the response is determined to be impossible, the response to the incoming call to the telephone is made. Performs utterance processing to indicate that it is impossible.

  The invention according to claim 6 is a telephone answering program that is connected to a telephone and is executed by a navigation device including a receiving device and a computer, and is an environment for acquiring environmental information that is information related to the environment around the moving body. An information acquisition unit configured to cause the computer to function as a response control unit that performs response control on an incoming call to the telephone based on the environment information; the response control unit configured to receive an incoming call on the telephone based on the environmental information; It is determined whether or not it is possible to respond, and when it is determined that it is possible to respond, the response to the incoming call to the telephone is permitted, and when it is determined that the telephone cannot be answered, An utterance process is performed to notify that an incoming call cannot be answered.

It is a block diagram which shows schematic structure of the navigation apparatus by an Example. It is a block diagram which shows schematic structure of the telephone response apparatus by an Example. It is a flowchart of the telephone response process by an Example. The example of the warning display in a navigation screen is shown. It is a flowchart of the telephone response process in the telephone call by an Example.

Explanation of symbols

1 Navigation device 22 CPU
23 ROM
24 RAM
36 Data storage unit 38 Communication device 44 Display

  In one aspect of the present invention, the telephone answering device includes: environment information acquisition means for acquiring environment information as information related to the environment around the mobile body; telephone connection means for connecting to the telephone in the mobile body; Response control means for performing response control for incoming calls to the telephone based on information, and whether the response control means is capable of responding to incoming calls to the telephone based on the environmental information If it is determined that it is possible to respond, the response to the incoming call to the telephone is permitted. If it is determined that the response is impossible, it is impossible to respond to the incoming call to the telephone. Performs utterance processing that conveys the fact.

  The above telephone answering device is suitably applied to a navigation device for a moving body such as a vehicle, and includes environment information acquisition means, telephone connection means, and response control means. The environment information acquisition means is, for example, a communication device, and acquires environment information that is information related to the environment around the mobile object. The telephone connection means is, for example, a communication interface and is connected to the telephone in the mobile body, for example, a mobile phone. The response control means is, for example, a CPU, and performs response control on incoming calls to the telephone based on the environment information. The response control means determines whether or not it is possible to respond to the incoming call to the telephone based on the environment information, and if it is determined that the response is possible, the response to the incoming call to the telephone is permitted. If it is determined that the response is impossible, an utterance process is performed to notify that the response to the incoming call to the telephone is impossible. By doing in this way, the danger of the accident which generate | occur | produces when a driver is distracted by the answer to a telephone can be reduced, and safety can be improved more.

  In one aspect of the telephone response device, the response control unit includes a passenger presence / absence determination unit that determines presence / absence of a passenger of the moving body. Even if it is determined that the response is impossible based on the above, the response to the incoming call to the telephone is permitted. In this way, the telephone answering device enables passengers to respond to incoming calls, and is more convenient to use.

  In one aspect of the telephone response device, the response control means includes warning display means for issuing a warning, and after allowing a response to an incoming call to the telephone, it is impossible to respond based on the environment information When the determination is made, a warning is issued to the driver of the moving body. Thereby, even if the situation around the host vehicle deteriorates during a call, the driver can be warned and the driver can be alerted.

  In a preferred embodiment of the above telephone answering apparatus, the environmental information includes road traffic information of a place where the mobile body is located, weather information of a place where the mobile body is located, and continuous running time of the mobile body. At least one of them.

  In another embodiment of the present invention, a telephone answering method includes an environment information acquisition step for acquiring environmental information as information about an environment around a mobile body, a telephone connection step for connecting to a telephone in the mobile body, A response control step of performing response control on incoming calls to the telephone based on environmental information, wherein the response control process is capable of responding to incoming calls on the telephone based on the environmental information. If it is determined that it is possible to respond, the response to the incoming call to the telephone is permitted. If it is determined that the response is impossible, the incoming call to the telephone cannot be answered. The utterance process that tells you is performed. Thereby, the risk of an accident that occurs when the driver is distracted by the response to the telephone can be reduced, and safety can be further improved.

  In still another embodiment of the present invention, a telephone answering program that is connected to a telephone and executed by a navigation device including a receiving device and a computer is an environment for acquiring environmental information that is information related to the environment around the mobile body. An information acquisition unit configured to cause the computer to function as a response control unit that performs response control on an incoming call to the telephone based on the environment information; the response control unit configured to receive an incoming call on the telephone based on the environmental information; It is determined whether or not it is possible to respond, and when it is determined that it is possible to respond, the response to the incoming call to the telephone is permitted, and when it is determined that the telephone cannot be answered, An utterance process is performed to notify that an incoming call cannot be answered. The above telephone response device can be realized by causing the computer in the navigation device to execute the telephone response program. The telephone answering program can be handled in a state stored in a storage medium.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The following description shows an example in which the present invention is applied to a vehicle navigation apparatus.

(Navigation device)
FIG. 1 shows the configuration of the navigation device 1. As shown in FIG. 1, the navigation device 1 includes a self-supporting positioning device 10, a GPS receiver 18, a system controller 20, a disk drive 31, a data storage unit 36, a communication interface 37, a communication device 38, a display unit 40, an audio output. A unit 50 and an input device 60 are provided.

  The autonomous positioning device 10 includes an acceleration sensor 11, an angular velocity sensor 12, and a distance sensor 13. The acceleration sensor 11 is made of, for example, a piezoelectric element, detects vehicle acceleration, and outputs acceleration data. The angular velocity sensor 12 is composed of, for example, a vibrating gyroscope, detects the angular velocity of the vehicle when the direction of the vehicle is changed, and outputs angular velocity data and relative azimuth data. The distance sensor 13 measures a vehicle speed pulse composed of a pulse signal generated with the rotation of the vehicle wheel.

  The GPS receiver 18 receives radio waves 19 carrying downlink data including positioning data from a plurality of GPS satellites. The positioning data is used to detect the absolute position of the vehicle from latitude and longitude information.

  The system controller 20 includes an interface 21, a CPU (Central Processing Unit) 22, a ROM (Read Only Memory) 23, and a RAM (Random Access Memory) 24, and controls the entire navigation apparatus 1.

  The interface 21 performs an interface operation with the acceleration sensor 11, the angular velocity sensor 12, the distance sensor 13, and the GPS receiver 18. From these, vehicle speed pulses, acceleration data, relative azimuth data, angular velocity data, GPS positioning data, absolute azimuth data, and the like are input to the system controller 20. The CPU 22 controls the entire system controller 20. The ROM 23 includes a nonvolatile memory (not shown) in which a control program for controlling the system controller 20 is stored. The RAM 24 stores various data such as route data preset by the user via the input device 60 so as to be readable, and provides a working area to the CPU 22.

  A system controller 20, a disk drive 31 such as a CD-ROM drive or a DVD-ROM drive, a data storage unit 36, a communication interface 37, a display unit 40, an audio output unit 50, and an input device 60 are mutually connected via a bus line 30. It is connected to the.

  The disk drive 31 reads and outputs content data such as music data and video data from a disk 33 such as a CD or DVD under the control of the system controller 20. The disk drive 31 may be either a CD-ROM drive or a DVD-ROM drive, or may be a CD and DVD compatible drive.

  The data storage unit 36 is configured by, for example, an HDD and stores various data used for navigation processing such as map data and facility data. Details of the map data will be described later.

  The communication device 38 includes, for example, an FM tuner, a beacon receiver, a mobile phone, a dedicated communication card, and the like, and traffic congestion and traffic information distributed from a VICS (Vehicle Information Communication System) center via the communication interface 37. Receive road traffic information and other information.

  The display unit 40 displays various display data on a display device such as a display under the control of the system controller 20. Specifically, the system controller 20 reads map data from the data storage unit 36. The display unit 40 displays the map data read from the data storage unit 36 by the system controller 20 on a display screen such as a display. The display unit 40 includes a graphic controller 41 that controls the entire display unit 40 based on control data sent from the CPU 22 via the bus line 30 and a memory such as a VRAM (Video RAM), and can display image information that can be displayed immediately. A buffer memory 42 that temporarily stores, a display control unit 43 that controls display of a display 44 such as a liquid crystal display or a CRT (Cathode Ray Tube) based on image data output from the graphic controller 41, and a display 44 are provided. . The display 44 is composed of, for example, a liquid crystal display device having a diagonal of about 5 to 10 inches, and is mounted near the front panel in the vehicle.

  The audio output unit 50 performs D / A (Digital to Analog) conversion of audio digital data sent from the CD-ROM drive 31, DVD-ROM 32, RAM 24, or the like via the bus line 30 under the control of the system controller 20. A D / A converter 51 to perform, an amplifier (AMP) 52 that amplifies the audio analog signal output from the D / A converter 51, and a speaker 53 that converts the amplified audio analog signal into sound and outputs the sound into the vehicle. It is prepared for. Moreover, the navigation apparatus 1 is provided with the microphone 61 which inputs the audio | voice in a vehicle as an audio | voice input unit.

  The input device 60 includes keys, switches, buttons, a remote controller, a voice input device, and the like for inputting various commands and data. The input device 60 is arranged around the front panel and the display 44 of the main body of the in-vehicle electronic system mounted in the vehicle. When the display 44 is a touch panel system, the touch panel provided on the display screen of the display 44 also functions as the input device 60.

(Telephone answering device)
Next, the telephone answering apparatus 100 of the present invention will be specifically described. FIG. 2 is a block diagram showing the configuration of the telephone answering apparatus 100 of the present invention.

  The telephone answering apparatus 100 of the present invention is applied to the navigation apparatus 1 and includes a response control means 71, a telephone 72, an environment information acquisition means 73, and a voice processing means 74 as shown in FIG.

  The environmental information acquisition means 73 acquires environmental information that is information related to the environment around the host vehicle. The environment information acquisition unit 73 includes a road traffic information acquisition unit 81, a weather information acquisition unit 82, and an elapsed travel time acquisition unit 83.

  The road traffic information acquisition unit 81 is, for example, the communication device 38 and acquires road traffic information of a place where the vehicle is located. Specifically, the road traffic information acquisition unit 81 acquires, from the VICS center, road traffic information such as traffic jam information and construction information at a location where the vehicle is located as environmental information.

  The weather information acquisition means 82 is, for example, the communication device 38, and acquires weather information of a place where the host vehicle is located as environmental information from the VICS center.

  The vehicle information acquisition unit 83 is, for example, the CPU 22 and acquires vehicle speed information indicating the current speed of the host vehicle as environmental information by the acceleration sensor 11 or the like. Moreover, the vehicle information acquisition means 83 uses the timer etc. which are not shown in figure, the time from the time which performed route setting in the navigation apparatus 1 to the present time, or the time from starting of the navigation apparatus 1 to the present time. It measures the continuous travel time of the host vehicle, and acquires the continuous travel time of the host vehicle as environmental information.

  The telephone 72 is, for example, a mobile phone connected to the communication interface 37, and the audio processing unit 74 includes the audio output unit 50 and the microphone 61.

  The response control means 71 is, for example, the CPU 22, and by controlling the telephone 72 and the voice processing means 74, it is possible to realize a hands-free function that allows the voice processing means 74 to make a call without holding the telephone 72 by hand. . Thus, the driver can hear the other party's voice from the speaker 53 and can transmit his / her voice to the other party via the microphone 61.

  The response control means 71 performs response control for incoming calls to the telephone 72 based on the environment information acquired by the environment information acquisition means 73.

  First, the response control means 71 determines whether or not a response to an incoming call to the telephone 72 is possible based on the environmental information. If the response control means 71 determines that a response is possible, the response control means 71 permits a response to an incoming call to the telephone 72. Specifically, when it is determined that the response control means 71 can respond, the response control means 71 is connected to the telephone 72 so that the driver can respond to the incoming call to the telephone 72 via the voice processing means 74 in a hands-free manner. The sound processing means 74 is controlled. On the other hand, when it is determined that the response is impossible, the response control means 71 performs an utterance process to notify that the response is impossible by sending an automatic response message to the incoming call to the telephone 72. The automatic response message is stored in advance in the data storage unit 36 or the like. The response control means 71 selects an automatic response message according to the environment information. Hereinafter, an example of a specific case where the response control unit 71 determines that the response is impossible will be described.

  When the vehicle is traveling at a certain speed or higher (for example, 80 km or more) such as when traveling on an expressway, the driver needs to drive carefully. Therefore, if the response control means 71 determines that the host vehicle is traveling at a certain speed or higher based on the vehicle speed information of the host vehicle, the response control unit 71 determines that a response to the incoming call to the telephone 72 is impossible. . At this time, the response control means 71 sends an automatic response message to the incoming call to the telephone 72, for example, “Please answer the message because you are currently traveling at high speed and cannot answer the call.” It should be noted that a constant speed value that is a criterion for determining whether or not response is possible is stored in advance in the ROM 23 or the like.

  When the vehicle is involved in a traffic jam, the driver needs to drive carefully because the distance between the vehicle and the vehicle that is traveling in front of the vehicle becomes close even though the vehicle is traveling at a low speed. Therefore, when the response control means 71 determines that the own vehicle is involved in the traffic jam based on the traffic jam information of the location where the own vehicle is acquired, which is acquired by the road traffic information acquiring means 81, the response control means 71 receives the incoming call to the telephone 72. It is determined that the response is impossible. At this time, the response control means 71 sends an automatic response message to the incoming call to the telephone 72, for example, “You are currently driving in a traffic jam and cannot answer the phone. And

  When your vehicle passes through a site under construction, it may be necessary to travel on a detour that is temporarily set up to bypass the site under construction, or the number of lanes that can be traveled decreases. Drivers need to drive carefully. Therefore, when the response control means 71 determines that the own vehicle is passing the place under construction based on the construction information of the place where the own vehicle is obtained, which is acquired by the road traffic information obtaining means 81, the response control means 71 returns to the telephone 72. It is determined that the incoming call cannot be answered. At this time, the response control means 71 responds to an incoming call to the telephone 72 by, for example, an automatic response message such as “You are currently driving on a road construction site and cannot answer the phone. Let it flow.

  Even when the vehicle is traveling in the rain or fog, the driver's visibility is poor and the driver needs to drive carefully. Therefore, when the response control means 71 determines that the own vehicle is traveling in rain or fog based on the weather information of the place where the own vehicle is acquired, which is acquired by the weather information acquisition means 82, the response control means 71 also returns to the telephone 72. It is determined that the incoming call cannot be answered. At this time, the response control means 71 responds to an incoming call to the telephone 72 with, for example, an automatic response message such as “Currently running in rain or fog and cannot answer the phone. Let it flow.

  If the continuous running time exceeds a certain time (for example, 2 hours), the driver begins to feel fatigue due to continuing driving. Even in such a case, the driver needs to drive carefully. Therefore, the response control means 71 determines that it is impossible to respond to an incoming call to the telephone 72 even when it is determined that the continuous running time has exceeded a certain time. At this time, the response control means 71 sends an automatic response message to the incoming call to the telephone 72, for example, "Please leave a message because you are currently driving for a long time. . It should be noted that a fixed time value serving as a criterion for determining whether or not response is possible is stored in advance in the ROM 23 or the like.

  The response control means 71 determines that it is possible to respond to an incoming call to the telephone 72 except for the example described above. As can be seen from the above, by using the telephone answering device 100 of the present invention, it is possible to reduce the risk of an accident that occurs when the driver is distracted by the response to the telephone, and to improve safety. Can be increased.

  In addition, since an automatic response message is played in accordance with the environmental information, the situation where the driver is placed can be communicated to the other party of the telephone, and the discomfort caused by not answering the telephone is reduced. be able to.

  Further, when there is a passenger in the passenger seat or the like, even if the response control means 71 determines that an incoming call to the telephone 72 cannot be answered, a hands-free response to the incoming call to the telephone 72 is provided. The telephone 72 and the voice processing means 74 are controlled so that the user can respond. This is because even if the driver is unable to respond to an incoming call to the telephone 72, the passenger is highly likely to be able to respond. Specifically, when the navigation device 1 is activated, for example, the display 44 displays an option of “with passenger” or “without passenger”, and the driver or passenger uses the input device 60. Select “With Passengers”. The response control means 71 can determine that there is a passenger based on the signal from the input device 60. By doing in this way, the telephone answering apparatus 100 can also respond to the incoming call to the passenger and is more convenient to use.

(Telephone answer processing)
Next, the telephone response process for performing the telephone response process as described above will be described. FIG. 3 is a flowchart of the telephone response process. This process is realized by the CPU 22 of the navigation device 1 executing a program stored in advance in the ROM 23 or the like.

  First, the CPU 22 determines whether there is an incoming call to the telephone 72 (step S11). If there is no incoming call to the telephone 72, the CPU 22 ends the process (step S11: No). If there is an incoming call to the telephone 72 (step S11: Yes), the CPU 22 determines whether there is a passenger next (step S12). If it is determined that there is a passenger (step S12: Yes), the CPU 22 proceeds to step S16. If it is determined that there is no passenger (step S12: No), the CPU 22 next determines whether or not the vehicle is being driven (step S13). If it determines with CPU22 not being vehicle driving (step S13: No), it will progress to step S16.

  If it is determined that the vehicle is driving (step S13: Yes), the CPU 22 next determines whether or not it is possible to respond to the incoming call to the telephone 72 based on the environmental information (step S14). If the CPU 22 determines that it can respond to the incoming call to the telephone 72 (step S14: Yes), it proceeds to step S16. If the CPU 22 determines that it cannot respond to the incoming call to the telephone 72 (step S14: No), it sends an automatic response message to the incoming call to the telephone 72 to indicate that the response is impossible. After the notification (step S15), the process is terminated.

  In step S <b> 16, the CPU 22 controls the telephone 72 and the voice processing means 74 so that the driver or passenger can respond to the incoming call to the telephone 72 in a hands-free manner. After the driver or the passenger makes a call via the voice processing means 74 (step S17), the CPU 22 ends the process.

  As described above, in this embodiment, the telephone answering device includes environment information acquisition means for acquiring environment information, which is information related to the environment around the mobile body, and telephone connection means for connecting to the telephone in the mobile body. Response control means for performing response control on incoming calls to the telephone based on the environmental information, and whether the response control means is capable of responding to incoming calls on the telephone based on the environmental information. If it is determined that it is possible to respond, the response to the incoming call to the telephone is permitted, and if it is determined that the response is impossible, it is impossible to respond to the incoming call to the telephone. Performs utterance processing that conveys Thereby, the risk of an accident that occurs when the driver is distracted by the response to the telephone can be reduced, and safety can be further improved.

(Telephone response processing during a call)
Next, the response control means 71 determines that it is possible to respond when there is an incoming call to the telephone 72, and determines that it is impossible to respond after permitting a response to the incoming call to the telephone 72. Describe the case. In other words, if the driver's surroundings deteriorate during a telephone call, specifically, if the driver's vehicle speed exceeds a certain speed during a telephone call, A case will be described in which the situation around the vehicle has changed to a state in which it is determined that no response can be made when an incoming call is received, such as when there is a traffic jam ahead or when the weather deteriorates.

  FIG. 4 shows an example of a warning display. The response control means 71 issues a warning when the situation around the host vehicle deteriorates. Specifically, as shown in FIG. 4, the response control means 71 displays a warning on the display 44 for a predetermined time. The response control means 71 hides the warning after a predetermined time elapses. However, if the driver continues the telephone call by the telephone 72, the warning is displayed again after the elapse of the predetermined time after further hiding the warning. 44. This predetermined time is set to a time that does not impair the navigation function of the navigation device 1.

  Note that the method of issuing a warning by the response control unit 71 is not limited to the method of displaying a warning on the display 44. Instead, or in addition, the voice output unit 50 may indicate, for example, “there is a traffic jam ahead. It may be announced by playing a voice message such as “Please note that it has occurred.”

  FIG. 5 is a flowchart of telephone response processing during a call. This process is also realized by the CPU 22 of the navigation device 1 executing a program stored in advance in the ROM 23 or the like.

  First, the CPU 22 determines whether or not a telephone call is in progress (step S21). If the CPU 22 determines that it is not in a telephone call (step S21: No), it proceeds to step S24. If it is determined that the telephone call is in progress (step S21: Yes), the CPU 22 next determines whether or not it is possible to respond to the incoming call to the telephone 72 based on the environmental information (step S22). If the CPU 22 determines that it can respond to the incoming call to the telephone 72 (step S22: Yes), it proceeds to step S24. If the CPU 22 determines that it cannot respond to the incoming call to the telephone 72 (step S22: No), it displays a warning on the display 44 for a predetermined time (step S23).

  In step S <b> 24, the CPU 22 determines whether a warning is displayed on the display 44. If the CPU 22 determines that no warning is displayed on the display 44 (step S24: No), the process is terminated. If the CPU 22 determines that the warning is displayed on the display 44 (step S24: Yes), the CPU 22 hides the warning (step S25), and then ends the process.

  By doing as described above, even when the situation around the host vehicle deteriorates during a call, the driver can be warned and the driver can be alerted.

  The present invention can be used for a navigation device such as a vehicle.

Claims (7)

Environmental information acquisition means for acquiring environmental information as information about the environment around the moving body;
A telephone connection means for connecting to the telephone in the mobile body;
Response control means for performing response control on incoming calls to the telephone based on the environmental information,
The response control means determines whether or not it is possible to respond to an incoming call to the telephone based on the environment information. If it is determined that the response is possible, the response control means returns a response to the incoming call to the telephone. A telephone answering apparatus characterized in that, if it is permitted and it is determined that a response is impossible, an utterance process is performed to notify that it is impossible to respond to an incoming call to the telephone.   The response control means includes a passenger presence / absence determination means for determining the presence / absence of a passenger of the moving body. When it is determined that a passenger is present, the response control means determines that a response is impossible based on the environmental information. 2. The telephone answering apparatus according to claim 1, wherein a response to an incoming call to the telephone is permitted even if the call is received.   The response control means has a warning display means for issuing a warning, and after permitting a response to an incoming call to the telephone, if it is determined that the response is impossible based on the environment information, The telephone answering device according to claim 1, wherein a warning is issued to the driver.   The environment information is at least one of road traffic information of a location where the mobile body is located, weather information of a location where the mobile body is located, and a continuous travel time of the mobile body. The telephone answering device according to any one of claims 1 to 3. An environmental information acquisition process for acquiring environmental information as information about the environment around the moving object;
A telephone connection step for connecting to a telephone in the mobile body;
A response control step of performing response control for incoming calls to the telephone based on the environmental information,
The response control step determines whether or not it is possible to respond to an incoming call to the telephone based on the environment information, and if it is determined that a response is possible, a response to the incoming call to the telephone is made. A telephone response method characterized in that, when it is determined that it is impossible to answer, an utterance process is performed to notify that an incoming call to the telephone is impossible. A telephone answering program that is connected to a telephone and is executed by a navigation device including a receiving device and a computer,
Environmental information acquisition means for acquiring environmental information, which is information about the environment around the moving object,
Causing the computer to function as response control means for performing response control on incoming calls to the telephone based on the environment information;
The response control means determines whether or not it is possible to respond to an incoming call to the telephone based on the environment information. If it is determined that the response is possible, the response control means returns a response to the incoming call to the telephone. A telephone answering program characterized by performing an utterance process for notifying that an incoming call to the telephone is impossible when it is permitted and it is judged that the answer is impossible.   A recording medium on which the telephone answering program according to claim 6 is recorded.

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