JP2013152571A - Information processing apparatus, information processing method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique to support the confirmation of surrounding conditions in case of an emergency.SOLUTION: An information processing apparatus includes traveling condition determination means that determines the presence or absence of a sudden braking, and audio control means that reduces the volume of an audio device or silences the audio device if there is a sudden braking.

Description

  The present invention relates to a technology of an information processing apparatus.

  2. Description of the Related Art Conventionally, there is a technology that assists driving by controlling the sound volume according to the driving state of the vehicle and the driver's attention. The device described in Patent Document 1 activates an alarm when it is determined that there is a danger from the relative speed or distance from the preceding vehicle, or increases the volume of the audio when there is no driving operation, Supports safe driving by stimulating the driver.

JP 2003-252077 A

  However, it is not always preferable to activate an alarm in a dangerous situation. For example, when an accident is actually involved, the user is given priority over checking the surrounding situation over alerting or warning. Therefore, with the above-described technology, there is a possibility that an unnecessary warning sound is emitted to the user or the recognition of the surrounding situation is hindered.

  An object of the present invention is to provide a technique for supporting confirmation of surrounding conditions in an emergency.

  In order to solve the above-described problems, an information processing apparatus according to the present invention includes a traveling state determination unit that determines whether or not there is sudden braking, and an audio control unit that reduces or silences the volume of the audio device when sudden braking occurs. It is characterized by providing.

It is a schematic block diagram of a navigation apparatus. It is a functional block diagram of an arithmetic processing part. It is a flowchart of a driving | running | working condition determination process. It is a flowchart of an audio control process. It is a figure which shows the example of an output screen of an audio control process.

  Hereinafter, an in-vehicle navigation device 100 as an example of an information processing device to which an embodiment of the present invention is applied will be described with reference to the drawings. In addition, although mentioned later, this invention is not restricted to vehicle-mounted, and is not restricted to a navigation apparatus.

<First embodiment>
FIG. 1 shows a configuration diagram of the navigation device 100. The navigation device 100 includes an arithmetic processing unit 1, a display 2, a storage device 3, a voice input / output device 4 (including a microphone 41 as a voice input device and a speaker 42 as a voice output device), an input device 5, and a ROM. The apparatus 6 includes a vehicle speed sensor 7, a gyro sensor 8, a GPS (Global Positioning System) receiver 9, an FM multiplex broadcast receiver 10, a beacon receiver 11, and an audio device 12.

  The audio device 12 reproduces information such as music, video, and images read from the storage device 3 and the ROM device 6 via the display 2 and the audio input / output device 4. In addition, the audio device 12 includes a tuner for receiving radio waves such as terrestrial or satellite digital broadcasts, and the radio waves received by the tuner are reproduced and recorded in the storage device 3 via the display 2 and the audio input / output device 4. . Note that the audio device 12 itself may include a storage device.

  The arithmetic processing unit 1 is a central unit that performs various processes. For example, the present location is detected based on information output from various sensors 7 and 8, the GPS receiver 9, the FM multiplex broadcast receiver 10, and the like. Further, map data necessary for display is read from the storage device 3 or the ROM device 6 based on the obtained current location information.

  The arithmetic processing unit 1 develops the read map data in graphics, and displays a mark indicating the current location on the display 2 in a superimposed manner. In addition, an optimal route (or a route or stopover point) that connects the current location or the departure location instructed by the user with the map data stored in the storage device 3 or the ROM device 6 is used. Search for the recommended route. In addition, the arithmetic processing unit 1 guides the user using the speaker 42 and the display 2.

  The arithmetic processing unit 1 of the navigation device 100 has a configuration in which each device is connected by a bus 25. The arithmetic processing unit 1 includes a CPU (Central Processing Unit) 21 that performs various processes such as numerical calculation and control of each device, and a RAM (Random Access Memory) that stores map data, arithmetic data, and the like read from the storage device 3. ) 22, a ROM (Read Only Memory) 23 for storing programs and data, and an I / F (interface) 24 for connecting various types of hardware to the arithmetic processing unit 1.

  The display 2 is a unit that displays graphics information generated by the arithmetic processing unit 1 or the like. The display 2 is configured by a liquid crystal display, an organic EL display, or the like.

  The storage device 3 includes at least a readable / writable storage medium such as an HDD (Hard Disk Drive) or a nonvolatile memory card.

  This storage medium stores a link table which is map data (including link data of links constituting roads on the map) necessary for a normal route search device.

  The voice input / output device 4 includes a microphone 41 as a voice input device and a speaker 42 as a voice output device. The microphone 41 acquires sound outside the navigation device 100 such as a voice uttered by a user or another passenger.

  The speaker 42 outputs a message to the user generated by the arithmetic processing unit 1 as an audio signal. The speaker 42 outputs a sound signal from the audio device 12. The microphone 41 and the speaker 42 are separately arranged at a predetermined part of the vehicle. However, it may be housed in an integral housing. The navigation device 100 can include a plurality of microphones 41 and speakers 42.

  The input device 5 is a device that receives an instruction from the user through an operation by the user. The input device 5 includes a touch panel 51, a dial switch 52, and other hardware switches (not shown) such as scroll keys and scale change keys.

  The touch panel 51 is mounted on the display surface side of the display 2 and can see through the display screen. The touch panel 51 specifies a touch position corresponding to the XY coordinates of the image displayed on the display 2, converts the touch position into coordinates, and outputs the coordinate. The touch panel 51 includes a pressure-sensitive or electrostatic input detection element.

  The dial switch 52 is configured to be rotatable clockwise and counterclockwise, generates a pulse signal for every rotation of a predetermined angle, and outputs the pulse signal to the arithmetic processing unit 1. The arithmetic processing unit 1 obtains the rotation angle from the number of pulse signals.

  The ROM device 6 includes at least a readable storage medium such as a ROM (Read Only Memory) such as a CD-ROM or a DVD-ROM, or an IC (Integrated Circuit) card. In this storage medium, for example, moving image data, audio data, and the like are stored.

  The vehicle speed sensor 7, the gyro sensor 8, and the GPS receiver 9 are used by the navigation device 100 to detect the current location.

  The vehicle speed sensor 7 is a sensor that outputs a value used to calculate the vehicle speed.

  The gyro sensor 8 is composed of an optical fiber gyro, a vibration gyro, or the like, and detects an angular velocity due to the rotation of the moving body.

  The GPS receiver 9 receives a signal from a GPS satellite and measures the distance between the mobile body and the GPS satellite and the rate of change of the distance with respect to three or more satellites to thereby determine the current location, travel speed, and travel of the mobile body. It measures the direction.

  The FM multiplex broadcast receiver 10 receives an FM multiplex broadcast signal transmitted from an FM broadcast station such as an HD radio. FM multiplex broadcasting includes VICS (Vehicle Information Communication System) information outline current traffic information, regulatory information, SA / PA (service area / parking area) information, parking lot information, weather information, etc. Information includes text information provided by radio stations.

  The beacon receiving device 11 receives rough current traffic information such as VICS information, regulation information, SA / PA (service area / parking area) information, parking lot information, weather information, emergency alerts, and the like. For example, it is a receiving device such as an optical beacon that communicates by light and a radio beacon that communicates by radio waves.

  FIG. 2 is a functional block diagram of the arithmetic processing unit 1. As shown in the figure, the arithmetic processing unit 1 includes a basic control unit 101, an input receiving unit 102, an output processing unit 103, a speed management unit 104, a traveling situation determination unit 105, and an audio control unit 106.

  The basic control unit 101 is a central functional unit that performs various processes, and controls other processing units according to the processing content. Further, information on various sensors, the GPS receiver 9 and the like is acquired, and a map matching process, a dead reckoning process, and the like are performed to identify the vehicle direction that is the direction in which the current location and the front of the vehicle are facing. In addition, the travel history is stored in the storage device 3 for each link by associating the travel date and time with the position as needed. Further, the current time is output in response to a request from each processing unit. In addition, an optimum route (recommended route) connecting the current location or the starting point instructed by the user and the destination is searched, and the user is guided using the speaker 42 and the display 2 so as not to deviate from the recommended route. In addition, the basic control unit 101 reads out map information based on the current location or a specified point from the storage device 3 and outputs a map graphic to the display 2 or the like via the output processing unit 103. Further, the basic control unit 101 controls the volume output from the speaker 42 in response to a request from each processing unit.

  The input receiving unit 102 receives an instruction from the user input via the input device 5 or the microphone 41, and transmits the request content to the basic control unit 101.

  The output processing unit 103 receives screen information to be displayed, converts it into a signal for drawing on the display 2, and instructs the display 2 to draw.

  The speed management unit 104 manages information related to the vehicle speed output from the vehicle speed sensor 7. Specifically, the speed management unit 104 stores the value indicated by the signal output from the vehicle speed sensor 7 for each sampling period in a memory such as the RAM 22 and accumulates the values in time series. For example, when the vehicle speed sensor 7 is an acceleration sensor, the acceleration value at each sampling time is stored in the RAM 22.

  Furthermore, the speed management unit 104 calculates the value of the vehicle speed at each sampling time of the vehicle and stores it in the RAM 22. For example, when the vehicle speed sensor is an acceleration sensor, the speed management unit 104 refers to the accumulated acceleration at each sampling time, calculates the vehicle speed at the sampling time from the accumulated value, and accumulates it in the RAM 22 in chronological order. Let

  The traveling state determination unit 105 is a processing unit that determines whether or not the vehicle is in a predetermined state using the information regarding the vehicle speed. In the present embodiment, the traveling state determination unit 105 determines whether the information managed by the speed management unit 104 indicates that the vehicle speed has rapidly decreased. That is, it is determined whether or not the driver has suddenly operated the brake. For example, when the vehicle speed sensor 7 is an acceleration sensor, when the detected acceleration is a negative value and the absolute value thereof exceeds a predetermined threshold A, it is determined that a sudden braking has occurred.

  When it is determined that the sudden braking has occurred, the traveling state determination unit 105 further determines whether or not the vehicle speed has fallen to a predetermined value (for example, 5 km / h) or less close to stopping. In this case, when the vehicle is close to being stopped, it is determined that the driver or the occupant needs to confirm the surrounding safety. And when it determines with the vehicle speed being in the state close | similar to a stop, the volume control request | requirement which requests | requires that the volume is suppressed is output to the audio control part 106. FIG.

  The traveling state determination unit 105 determines whether or not the vehicle speed recovers to a predetermined value close to normal driving (for example, 10 km / h) or more and a predetermined time elapses as it is. That is, it is determined whether or not the vehicle is released from the situation requiring safety confirmation and returned to normal operation. If it is determined that the vehicle has returned to normal driving, the traveling state determination unit 105 outputs a volume recovery request that requests the audio control unit 106 to recover the volume.

  When the audio control unit 106 receives the volume control request from the driving condition determination unit 105, the audio control unit 106 instructs the basic control unit 101 to suppress the audio signal from the audio device 12 to the speaker 42, and suppresses the volume derived from the audio device 12. . This means that the volume of the audio device 12 is adjusted to be lower than a specific value or to be muted (hereinafter, volume suppression is described as a mute process, but these are replaced with a process of lowering the volume). .

  Further, when a volume recovery request is received from the driving situation determination unit 105, the basic control unit 101 is instructed to adjust the recovery of the audio signal from the audio device 12 to the speaker 42, and the volume derived from the audio device 12 gradually increases to the set volume. Adjust for recovery (fade-in).

  Each functional unit of the arithmetic processing unit 1 described above, that is, the basic control unit 101, the input reception unit 102, the output processing unit 103, the speed management unit 104, the traveling state determination unit 105, and the audio control unit 106, the CPU 21 executes a predetermined program. Constructed by reading and executing. Therefore, the ROM 23 stores a program for realizing the processing of each functional unit.

  In addition, each above-mentioned component is classified according to the main processing content, in order to make an understanding easy the structure of the navigation apparatus 100. FIG. Therefore, the present invention is not limited by the way of classifying the components and their names. The configuration of the navigation device 100 can be classified into more components depending on the processing content. Moreover, it can also classify | categorize so that one component may perform more processes.

  Each functional unit may be constructed by hardware (ASIC, GPU, etc.). Further, the processing of each functional unit may be executed by one hardware or may be executed by a plurality of hardware.

  [Description of Operation] Next, the operation of the navigation apparatus 100 will be described. FIG. 3 is a flowchart of the traveling state determination process executed by the traveling state determination unit 105. This flow is started when the navigation device 100 is activated.

  First, the traveling state determination unit 105 acquires the acceleration of the vehicle (step S001). Specifically, the traveling state determination unit 105 acquires the acceleration value at the latest sampling time stored in the RAM 22. Here, the vehicle speed sensor 7 is an acceleration sensor, and the acceleration value at each sampling time is updated by the speed management unit 104 as needed.

  Next, the traveling state determination unit 105 determines whether or not the acceleration acquired in step S001 indicates sudden braking (step S002). Specifically, the traveling state determination unit 105 determines whether or not the acquired acceleration is a negative value and the absolute value exceeds a predetermined threshold A for determining whether or not there is a sudden brake. judge.

  As such a threshold A, for example, it is desirable to use an acceleration when a sudden braking operation is performed from an initial braking speed at which the vehicle can stop at a predetermined stopping distance. For example, when the stop distance is set to 22 m on the dry road surface (the pedal force is constant), the braking speed of ordinary cars is around 40 km / h, but this value varies depending on the vehicle type and vehicle components. Therefore, the acceleration applied at the time of sudden braking also has a different value. Therefore, by storing the threshold value A for each vehicle type or vehicle component in the storage device 3 in advance, the threshold value A suitable for each vehicle can be used. The acceleration during deceleration naturally takes a negative value, but here the absolute value is used as the threshold A.

  Returning to FIG. 3, when the acquired acceleration is a negative value and the absolute value does not exceed the predetermined threshold A (in the case of “NO” in step S002), the traveling state determination unit 105 Return control to S001.

  When the acquired acceleration is a negative value and the absolute value thereof exceeds the threshold A (in the case of “Yes” in step S002), the traveling state determination unit 105 determines that there has been a sudden brake. Further, it is further determined whether or not the vehicle speed falls below a predetermined threshold S (for example, 5 km / h) for determining whether or not the vehicle speed is close to being stopped. (Step S003). Specifically, the traveling state determination unit 105 acquires the latest vehicle speed stored in the RAM 22 and determines whether or not this is equal to or less than a predetermined threshold value S.

  If the vehicle speed is not equal to or lower than the predetermined threshold S (“NO” in step S003), the traveling state determination unit 105 returns the control to step S001.

  When the vehicle speed is equal to or lower than the predetermined threshold S (“Yes” in step S003), the traveling state determination unit 105 determines that the vehicle speed is close to a stop and controls the audio control unit 106 to control the volume. Is requested (step S004).

  When the audio control unit 106 receives a volume control request, the audio control unit 106 first asks the audio device 12 about the current set volume, acquires the set volume before volume control, and stores it in the RAM 22. Further, the basic control unit 101 is instructed to adjust the mute of the audio signal from the audio device 12 to the speaker 42 so that the volume derived from the audio device 12 is adjusted to mute.

  Next, the traveling state determination unit 105 determines whether or not the vehicle speed is equal to or higher than a predetermined threshold R (for example, 10 km / h) for determining whether or not the vehicle speed has returned to normal driving. (Step S003). Specifically, the traveling state determination unit 105 acquires the latest vehicle speed stored in the RAM 22 and determines whether or not the vehicle speed is equal to or greater than a predetermined threshold R (step S005).

  When the vehicle speed is not equal to or higher than the predetermined threshold R (when “NO” in step S005), the traveling state determination unit 105 repeats the process of step S005.

  When the vehicle speed is equal to or higher than the predetermined threshold R (when “YES” in step S005), the traveling state determination unit 105 determines whether the vehicle speed equal to or higher than the threshold R continues for a predetermined period (step S006). ). Specifically, the traveling state determination unit 105 acquires a vehicle speed corresponding to a predetermined period stored in the RAM 22, and determines whether or not a vehicle speed equal to or higher than the threshold value R is continuously detected at each sampling time point.

  When the vehicle speed equal to or higher than the predetermined period threshold R is not maintained (in the case of “NO” in step S006), the traveling state determination unit 105 repeats the process of step S005.

  When the vehicle speed equal to or higher than the predetermined period threshold value R is maintained (in the case of “Yes” in step S006), the traveling state determination unit 105 determines that the vehicle has returned to normal driving and determines that the audio control unit 106 has recovered. Is requested to perform volume recovery control (step S007), and the control returns to step S001.

  When the audio control unit 106 receives the volume recovery request, the audio control unit 106 acquires the set volume before the volume suppression of the audio device 12 from the RAM 22. Then, the basic control unit 101 is instructed to adjust the recovery of the audio signal from the audio device 12 to the speaker 42 so that the volume derived from the audio device 12 is gradually recovered (fade in) to the set volume.

  The first embodiment of the present invention has been described above.

  According to the first embodiment of the present invention, the navigation device 100 can suppress the volume of the audio device 12 under a situation where safety confirmation is required. That is, it is possible to save the trouble of adjusting the volume in a situation where the surrounding situation confirmation is necessary, and the driver and the occupant can immediately confirm the surrounding situation.

  Further, according to the first embodiment of the present invention, the navigation apparatus 100 can automatically recover the volume of the audio apparatus 12 when the navigation apparatus 100 is removed from a situation that requires safety confirmation. That is, it is possible to save the trouble of adjusting the volume when returning to normal driving, and the driver and the occupant can return to the original environment without requiring troublesome operations.

<Second Embodiment>
Next, a second embodiment of the present invention will be described. In the arithmetic processing unit 1 according to the second embodiment, the audio control unit 106 performs further audio control. Hereinafter, items related to points different from the first embodiment will be mainly described.

  The audio control unit 106 basically performs the same control as the audio control unit 106 of the first embodiment, but differs from the first embodiment in that the following control is further performed.

  When the audio control unit 106 receives a volume control request from the traveling state determination unit 105, the audio control unit 106 inquires of the audio device 12 about the current state (mode) and performs control according to the state. The state of the audio device means, for example, output of information read from a recording medium (that is, information that can be paused) and information obtained by receiving radio waves from a television / radio (that is, temporary information). Information that cannot be stopped). Hereinafter, the former state is abbreviated as “reproduction”, and the latter state is abbreviated as “reception”.

  Specifically, when the state of the audio device 12 is “reproduction”, the audio control unit 106 pauses the reproduction process. When the state of the audio device 12 is “reception”, a recording start request is output to start recording information being recorded (recording, recording, etc.). In other words, this prevents the unviewed part from occurring while the driver and the occupant perform safety confirmation.

  When the audio control unit 106 receives a volume recovery request from the traveling state determination unit 105, the audio control unit 106 performs control in accordance with the state of the audio device 12. Specifically, when the state acquired above is “playback”, a suspension cancellation request is output to cancel the suspension. In the case of “reception”, a recording end request is outputted to end the recording, and a selection screen asking whether or not to reproduce the recorded contents on the spot is displayed on the display 2. In other words, when the driver and the occupant return to normal driving, they can naturally return to the original state.

  [Description of Operation] FIG. 4 is a flowchart of audio control processing executed by the audio control unit 106. This flow is started when a volume suppression request is received from the traveling state determination unit 105.

  The audio control unit 106 determines the state of the audio device 12 when the volume control request is received from the traveling state determination unit 105 (step S101). Specifically, the audio control unit 106 inquires of the audio device 12 about the current state (mode) and the set volume, and waits for a response. If there is no response within a predetermined time, it is determined that the audio apparatus 12 is in another state (stopped, paused state, etc.), and the process ends (in the case of “no response” in step S101). .

  When the response from the audio device 12 indicates “reception” (in the case of “reception” in step S101), the audio control unit 106 outputs a sound volume suppression instruction (step S102). Specifically, the audio control unit 106 stores the set volume acquired from the audio device 12 in the RAM 22. Then, the basic control unit 101 is instructed to mute the audio signal from the audio device 12 to the speaker 42 and adjust the volume derived from the audio device 12 to mute.

  Next, the audio control unit 106 causes the audio device 12 to start recording (step S103). Specifically, the audio control unit 106 outputs a recording start request to the audio device 12 to start recording information being reproduced.

  Furthermore, the audio control unit 106 waits for a volume recovery request (step S104). Specifically, the audio control unit 106 determines whether or not there is a volume recovery request from the traveling state determination unit 105. If the volume recovery request is not received (in the case of “NO” in step S104), the same step is performed. repeat.

  When a volume recovery request is received (in the case of “YES” in step S104), the audio control unit 106 outputs a volume recovery instruction. (Step S105). Specifically, the audio control unit 106 reads the set volume acquired from the audio device 12 from the RAM 22. Then, the basic control unit 101 is instructed to adjust the recovery of the audio signal from the audio device 12 to the speaker 42 so that the volume derived from the audio device 12 is gradually recovered (fade in) to the set volume.

  Next, the audio control unit 106 causes the audio device 12 to finish recording information (step S106). Specifically, the audio control unit 106 outputs a recording end request to the audio device 12 and ends the recording of information.

  Further, the audio control unit 106 displays a predetermined selection screen on the display 2 and waits for an instruction (step S107).

  FIG. 7 is a screen display example 500 displayed on the display 2 in step S107. The screen display example 500 includes a question asking the user whether or not the audio device 12 has started recording in step S <b> 103, and an area 501 for the user to input selection via the touch panel 51. It is displayed.

  When an instruction to reproduce is input via the touch panel 51 (in the case of “reproduce” in step S107), the audio control unit 106 requests the audio device 12 to reproduce the recorded content (step S108) and selects it. The screen is closed, the screen is changed to the audio display, and the process is terminated. Thereby, the reproduction of the recorded content is started.

  On the other hand, when an instruction not to reproduce is input (in the case of “do not reproduce” in step S107), the audio control unit 106 closes the selection screen and ends the process.

  Returning to step S101, if the response from the audio device 12 indicates “reproduction” (in the case of “reproduction” in step S101), the audio control unit 106 and the audio control unit 106 become the basic control unit 101. A sound volume suppression instruction is output to (step S109). This process is the same as step S102.

  Next, the audio control unit 106 causes the audio device 12 to pause reproduction (step S110). Specifically, the audio control unit 106 outputs a playback pause request to the audio device 12 to pause playback of information.

  Furthermore, the audio control unit 106 waits for a volume recovery request (step S111). This process is the same as step S104. When the volume recovery request is not received (in the case of “NO” in step S111), the audio control unit 106 repeats the same step.

  When a volume recovery request is received (in the case of “YES” in step S111), the audio control unit 106 outputs a volume recovery instruction (step S112). This process is the same as step S105.

  Then, the audio control unit 106 causes the audio device 12 to cancel the pause (step S113). Specifically, the audio control unit 106 outputs a pause release request to the audio device 12 to release the pause.

  The second embodiment of the present invention has been described above.

  According to the second embodiment of the present invention, the navigation device 100 can suppress the volume of the audio device 12 under a situation where safety confirmation is necessary. In addition, since recording and pause are automatically executed according to the state of the audio device, no unviewed section is generated even during safety confirmation.

  Further, according to the second embodiment of the present invention, the navigation device 100 can perform playback without a sense of incongruity from an unviewed section when the navigation apparatus 100 is released from a situation where safety confirmation is required.

  The present invention is not limited to the above embodiment. The above embodiment can be variously modified within the scope of the technical idea of the present invention.

  For example, the speed management unit 104 may acquire a signal related to the vehicle speed from other than the navigation device 100. For example, a similar signal can be acquired from a vehicle speed sensor included in a vehicle ECU (not shown) or an airbag device.

  In step S002 of the traveling state determination process, the traveling state determination unit 105 may determine the traveling state from the vehicle speed. For example, when the vehicle speed sensor 7 is a speed sensor that outputs a pulse signal proportional to the rotation speed of the axle, the traveling state determination unit 105 determines that the deceleration change in a predetermined period exceeds a predetermined threshold A ′. It is determined that there was a sudden brake. As such a threshold A ′, it is desirable to set a difference between the initial braking speed and a predetermined threshold S close to the stop. For example, when the initial braking speed is 40 km / h and the threshold S is 5 km / h, the threshold A ′ is preferably set to 40−5 = 35 km / h.

  Further, the traveling state determination unit 105 may determine that there has been a sudden brake when detecting the activation of the ABS. In addition, for example, if there is a behavior that predicts sudden braking or a dangerous situation such as activation of an airbag, depression amount of a brake pedal, detection of an angular velocity greater than a predetermined amount, processing after step S004 is executed. Good.

  In addition, when there is any signal from the input device 5 when the volume is suppressed, the traveling state determination unit 105 outputs a volume recovery request and promptly returns the audio apparatus 12 to the original state.

  Further, for example, the audio control unit 106 displays a screen on the display 2 that informs the driver and the occupant that the volume is suppressed in step S102 and step S109 (for example, a message such as “mute” is displayed). It may be displayed. Further, for example, in the same step, only the volume of the speaker on the driver's seat side may be adjusted, and the set volume may be maintained without adjusting the volume of the speaker installed on the passenger seat side or the rear seat. Further, in the case of a vehicle equipped with a device that generates engine sound in a pseudo manner, the engine sound may be further stopped.

  Further, for example, in the same step, the audio control unit 106 may unlock the vehicle door and open the power window. As a result, when an accident occurs, the occupant can quickly escape from the vehicle. Moreover, the video of the vehicle camera may be displayed on the display 2 to prompt confirmation of the surrounding safety.

  Further, for example, in step S106, the audio control unit 106 may display a selection screen that displays options for whether or not to perform double-speed playback. As a result, the driver and the passenger can quickly watch the unviewed part and catch up with the current broadcast content.

  Furthermore, you may combine all or some of each invention technique described in the said embodiment and its modification.

  In the above, this invention was demonstrated centering on embodiment.

  In the above embodiment, the example in which the present invention is applied to the navigation device has been described. However, the present invention is not limited to the navigation device, and for example, a mobile phone, a PDA (Personal Digital Assistant), a mobile personal computer, a small portable navigation device. It can be applied to all information terminals such as. Further, in the above embodiment, the present invention assumes a navigation device that is brought into or attached to a vehicle, but is not limited to this, and is brought into a moving body powered by electricity other than the vehicle, or It may be a terminal device to be attached.

DESCRIPTION OF SYMBOLS 1 ... Arithmetic processing part, 2 ... Display, 3 ... Memory | storage device, 4 ... Voice output device, 5 ... Input device, 6 ... ROM device, 7 ... Vehicle speed sensor , 8 ... Gyro sensor, 9 ... GPS receiver, 10 ... FM multiplex broadcast receiver, 11 ... Beacon receiver, 12 ... Audio device, 21 ... CPU, 22 ... RAM, 23 ... ROM, 24 ... I / F, 25 ... bus, 41 ... microphone, 42 ... speaker, 51 ... touch panel, 52 ... dial switch, 100. ..Navigation device 101... Basic control section 102... Input reception section 103... Output processing section 104. Audio control unit.

Claims (8)

A traveling state determination means for determining presence or absence of sudden braking;
Audio control means for lowering or muting the volume of the audio device in case of sudden braking;
An information processing apparatus comprising: The information processing apparatus according to claim 1,
The traveling state determination means determines whether or not a predetermined vehicle speed is maintained for a predetermined period after the volume of the audio device is lowered or silenced,
The information processing apparatus, wherein the audio control means recovers the volume of the audio device to a volume before being lowered or before mute when a predetermined vehicle speed is maintained for a predetermined period. The information processing apparatus according to claim 1, wherein:
The audio control means specifies the state of the audio device when there is a sudden braking,
If the audio device is playing information that can be paused, pause the playback of the audio device,
When the audio device is playing back information that cannot be paused, the information played back by the audio device is stored in storage means. The information processing apparatus according to claim 3,
The audio control means, when the predetermined vehicle speed is maintained for a predetermined period after the volume of the audio device is lowered or silenced,
An information processing apparatus that releases the pause of the audio apparatus or ends the storage of the information. The information processing apparatus according to claim 4,
The audio control means includes
An information processing apparatus that displays a screen for selecting whether or not to reproduce the stored contents after the audio apparatus finishes storing the information. An information processing method by an information processing apparatus,
The information processing apparatus includes:
A sudden braking determination step for determining the presence or absence of sudden braking;
A volume suppression step for lowering or muting the volume of the audio device in the event of sudden braking;
The information processing method characterized by implementing. An information processing method according to claim 6,
The information processing apparatus includes:
A situation determination step for determining whether or not a predetermined vehicle speed is maintained for a predetermined period after the volume of the audio device is reduced or silenced;
A volume recovery step of recovering the volume of the audio device to a volume before lowering or before mute when a predetermined vehicle speed is maintained for a predetermined period;
The information processing method characterized by further implementing. A program that causes a computer to perform volume control,
Causing the computer to function as control means;
For the control means,
A sudden braking determination procedure for determining the presence or absence of sudden braking;
A volume control procedure to reduce or mute the volume of the audio device in case of sudden braking;
A situation determination procedure for determining whether or not a predetermined vehicle speed is maintained for a predetermined period after the volume of the audio device is reduced or silenced;
A volume recovery procedure for recovering the volume of the audio device to a volume before lowering or before mute when a predetermined vehicle speed is maintained for a predetermined period;
A program characterized by having executed.

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