CN108234751B - Automatic danger detection method, mobile terminal and computer readable storage medium - Google Patents

Automatic danger detection method, mobile terminal and computer readable storage medium Download PDF

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CN108234751B
CN108234751B CN201711371637.1A CN201711371637A CN108234751B CN 108234751 B CN108234751 B CN 108234751B CN 201711371637 A CN201711371637 A CN 201711371637A CN 108234751 B CN108234751 B CN 108234751B
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mobile terminal
preset
time
call
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CN108234751A (en
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陈浩
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Hunan ta'ao Communication Co., Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/72418—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality for supporting emergency services
    • H04M1/72421—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality for supporting emergency services with automatic activation of emergency service functions, e.g. upon sensing an alarm
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/18—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being spectral information of each sub-band
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
    • H04M1/72451—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to schedules, e.g. using calendar applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
    • H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals
    • G10L2025/783—Detection of presence or absence of voice signals based on threshold decision

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Telephone Function (AREA)

Abstract

The invention discloses a method for automatically detecting danger, which comprises the following steps: acquiring sound signals of the environment where the mobile terminal is located in real time; calculating the short-time energy value of each frame of sound signal; judging whether two target signal segments exist, wherein the short-time energy value is greater than a preset energy threshold value, and the duration time is greater than a first preset time; if the two target signal segments exist, judging whether the time interval between the two target signal segments is greater than a second preset time length; and if the time interval between the two target signal segments is not greater than the second preset time length, controlling the mobile terminal to call a preset number. In addition, the invention also discloses a mobile terminal and a computer readable storage medium. The method can judge whether the current environment is dangerous according to the sound signal of the environment where the mobile terminal is located, and control the mobile terminal to call the preset number for help under the condition that the current environment is dangerous, so that the timeliness of the help can be effectively guaranteed.

Description

Automatic danger detection method, mobile terminal and computer readable storage medium
Technical Field
The present invention relates to the field of mobile terminal technologies, and in particular, to an automatic danger detection method, a mobile terminal, and a computer-readable storage medium.
Background
The safety is the permanent theme of society and people, the frequent occurrence of events such as violent robbery, burglary and the like in the society, and the personal safety and the property safety are increasingly valued by people. With the continuous development of electronic technology, mobile terminals (such as smart phones, tablet computers, and the like) bring great convenience to life and work of people, and gradually become indispensable communication tools for people.
When the victim is in danger, if the victim does not seek help in time, the victim is easy to be damaged irreversibly. In the prior art, a mobile terminal cannot detect whether a user is in a dangerous state or not, and cannot guarantee the timeliness of seeking help.
Disclosure of Invention
In view of the above, the present invention provides an automatic danger detection method, a mobile terminal and a computer readable storage medium to solve the above technical problems.
Firstly, in order to achieve the above object, the present invention provides an automatic danger detection method applied to a mobile terminal, where the method includes:
acquiring sound signals of the environment where the mobile terminal is located in real time;
calculating the short-time energy value of each frame of sound signal;
judging whether two target signal segments exist, wherein the short-time energy value is greater than a preset energy threshold value, and the duration time is greater than a first preset time;
if the two target signal segments exist, judging whether the time interval between the two target signal segments is greater than a second preset time length;
and if the time interval between the two target signal segments is not greater than the second preset time length, controlling the mobile terminal to call a preset number.
Optionally, if the time interval between the two target signal segments is not greater than the second preset time duration, controlling the mobile terminal to call a preset number includes:
if the time interval between the two target signal segments is not greater than the second preset time length, providing a user interface at the mobile terminal for a user to select whether to call a preset number or not;
and if the call confirmation operation input by the user is received or if the call confirmation operation is not received within a third preset time, controlling the mobile terminal to call a preset number.
Optionally, the providing a user interface at the mobile terminal for a user to select whether to call a preset number includes:
controlling the mobile terminal to prompt a user to select whether to call a preset number or not by voice;
if receiving a call confirmation operation input by a user, controlling the mobile terminal to call a preset number, including:
and if preset voice information input by a user is received, controlling the mobile terminal to call a preset number.
Optionally, before the determining whether there are two target signal segments in which the short-time energy value is greater than the preset energy threshold and the duration is greater than the first preset duration, the method further includes:
determining the scene of the mobile terminal according to the sound signal of the environment where the mobile terminal is located;
and determining that an energy threshold corresponding to a scene where the mobile terminal is located is a preset energy threshold, wherein different scenes correspond to different energy thresholds.
Optionally, the determining that the energy threshold corresponding to the scene where the mobile terminal is located is a preset energy threshold includes:
acquiring background sound data in at least one scene;
calculating an average value of short-time energy values of background sound data in the at least one scene;
and multiplying the average value of the short-time energy values under the at least one scene by a preset coefficient corresponding to the scene to serve as an energy threshold corresponding to the scene.
Optionally, the calculating the short-time energy value of each frame of sound signal includes:
sampling the sound signals to obtain multi-frame sound signals, wherein each frame of sound signals comprises a preset number of sampling points;
and calculating the short-time energy value of the preset number of sampling points of each frame of sound signal.
Optionally, before the determining whether there are two target signal segments in which the short-time energy value is greater than the preset energy threshold and the duration is greater than the first preset duration, the method further includes:
judging whether the short-time energy value of the sound signal is larger than a first energy value or not;
if the short-time energy value of the sound signal is larger than the first energy value, judging whether two target signal segments exist, wherein the short-time energy value is larger than a preset energy threshold value, and the duration time is larger than a first preset time length, and the first energy value is not larger than the preset energy threshold value.
Optionally, after controlling the mobile terminal to call a preset number, the method further includes:
acquiring geographical position information of the mobile terminal, and sending the geographical position information to the preset number; and/or
And opening a microphone and/or a camera of the mobile terminal, and sending audio collected by the microphone of the mobile terminal and/or images captured by the camera of the mobile terminal to the preset number.
Further, to achieve the above object, the present invention also provides a mobile terminal including a memory, at least one processor, and at least one program stored on the memory and executable on the at least one processor, the at least one program implementing the steps of the method of any one of the above when executed by the at least one processor.
Further, to achieve the above object, the present invention also provides a computer-readable storage medium storing at least one program executable by a computer, the at least one program causing the computer to perform the steps of the above method when executed by the computer.
Compared with the prior art, the automatic danger detection method provided by the invention collects the sound signals of the environment where the mobile terminal is located in real time; calculating the short-time energy value of each frame of sound signal; judging whether two target signal segments exist, wherein the short-time energy value is greater than a preset energy threshold value, and the duration time is greater than a first preset time; if the two target signal segments exist, judging whether the time interval between the two target signal segments is greater than a second preset time length; and if the time interval between the two target signal segments is not greater than the second preset time length, controlling the mobile terminal to call a preset number. Therefore, the method can judge whether the current environment is dangerous according to the sound signal of the environment where the mobile terminal is located, and control the mobile terminal to call the preset number for help under the condition that the current environment is dangerous, so that the timeliness of the help can be effectively guaranteed, and the possibility that the user is damaged is reduced.
Drawings
Fig. 1 is a schematic hardware configuration diagram of a mobile terminal implementing various embodiments of the present invention;
fig. 2 is a communication network system architecture diagram provided by an embodiment of the present invention;
FIG. 3 is a flow chart illustrating a method for automatically detecting a danger according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating another method for automatically detecting a hazard according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a sound waveform in a noisy background environment according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of sound waveforms in a quiet background environment according to an embodiment of the present invention;
FIG. 7 is a schematic flow chart illustrating another method for automatically detecting a hazard according to an embodiment of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.
The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.
Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: the mobile terminal includes components such as an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an a/V (audio/video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111, where the number of the processors 110 is at least one. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes each component of the mobile terminal in detail with reference to fig. 1:
the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).
WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.
The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.
Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.
The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to at least one element within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and the external device.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include at least one processing unit; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.
Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.
In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.
Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present invention, where the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.
Specifically, the UE201 may be the terminal 100 described above, and is not described herein again.
The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Among them, the eNodeB2021 may be connected with other eNodeB2022 through backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.
The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a PGW (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. The MME2031 is a control node that handles signaling between the UE201 and the EPC203, and provides bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).
The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.
Although the LTE system is described as an example, it should be understood by those skilled in the art that the present invention is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.
Based on the hardware structure of the mobile terminal 100 and the communication network system, various embodiments of the method of the present invention are provided.
Referring to fig. 3, fig. 3 is a flowchart illustrating steps of a method for automatically detecting a danger according to an embodiment of the present invention, where the method is applied to a mobile terminal, as shown in fig. 3, the method includes:
step 301, collecting sound signals of the environment where the mobile terminal is located in real time.
In the step, the method collects the sound signal of the environment where the mobile terminal is located in real time. Specifically, the method can acquire the sound signal of the environment where the mobile terminal is located in real time through a microphone of the mobile terminal.
Step 302, calculate the short-time energy value of each frame of sound signal.
In this step, the method calculates the short-time energy value of each frame of sound signal of the environment where the mobile terminal is located, which is acquired by the method. In some embodiments of the present invention, the method may sample the sound signal to obtain multiple frames of sound signals including the preset number of sampling points, and then calculate the short-time energy value of the preset number of sampling points of each frame of sound signal. In some embodiments of the present invention, the preset number may be 256, that is, the method may sample the sound signal, and use each collected 256 sampling points as a frame of sound signal. The method adopts a preset formula to calculate the short-time energy value of each frame of sound signal, and the preset formula can be as follows:
Figure BDA0001513851670000091
assuming that a sound waveform time domain signal is x (l), and a signal of an nth sampling point obtained after windowing and framing is xn (m), where m is 0, 1, 2, …, N-1; n is a predetermined number, for example, 256 in the embodiment where the predetermined number is 256.
And 303, judging whether two target signal segments exist, wherein the short-time energy value is greater than a preset energy threshold value, and the duration time is greater than a first preset time.
In this step, the method determines whether there are two target signal segments with a short-time energy value greater than a preset energy threshold and a duration greater than a first preset duration, and if there are two target signal segments with a short-time energy value greater than a preset energy threshold and a duration greater than a first preset duration, executes step 304; conversely, if there are no two target signal segments with the short-time energy value greater than the preset energy threshold and the duration greater than the first preset time, the process ends or continues to execute step 303 until there are two target signal segments with the short-time energy value greater than the preset energy threshold and the duration greater than the first preset time, execute step 304.
The method for determining whether there are two target signal segments having a short-time energy value greater than a preset energy threshold and a duration greater than a first preset time period may specifically be that the method determines whether the short-time energy value of a sound signal segment is greater than the preset energy threshold, if the short-time energy value of the sound signal segment is greater than the preset energy threshold, the method further determines whether the duration having the short-time energy value greater than the preset energy threshold is greater than the first preset time period, if the duration having the short-time energy value greater than the preset energy threshold is greater than the first preset time period, the method determines that the sound signal segment is a target signal segment, and after determining that the sound in the environment where the mobile terminal is located includes a target signal segment, the method further determines whether there is another target signal segment, if the short-time energy value is greater than the preset energy threshold value, the method determines that two target signal segments with the duration greater than a first preset duration exist in the sound of the environment where the mobile terminal is located.
Specifically, the method may determine whether the short-time energy value of each frame of sound signal is greater than the preset energy threshold, if the short-time energy value of a certain frame of sound signal is greater than the preset energy threshold, the time at which the method records the frame of sound signal is the time t1, the method continues to determine whether the short-time energy value of another frame of sound signal after the frame of sound signal is greater than the preset energy threshold, if the short-time energy value of another frame of sound signal after the frame of sound signal is not greater than the preset energy threshold, the time at which the method records the another frame of sound signal is the time t2, (t2-t1) is the duration during which the short-time energy of the sound signal is greater than the preset energy threshold, the method determines (t2-t1) whether the short-time energy value is greater than the first preset duration, and if (t2-t1) is greater than the first preset duration, the method determines the sound signal segment as a target signal segment. In the embodiment of the invention, the first preset time can be 3s, so that the method can effectively avoid judging instantaneous sound pulses such as automobile whistling and the like as dangerous event sound pulses and reduce the probability of misjudgment.
And step 304, judging whether the time interval between the two target signal segments is greater than a second preset time length.
In this step, if there are two target signal segments with a short-time energy value greater than a preset energy threshold and a duration greater than a first preset duration, the method further determines whether a time interval between the two target signal segments is greater than a second preset duration, and if the time interval between the two target signal segments is not greater than the second preset duration, executes step 305; and if the time interval between the two target signal segments is greater than the second preset time length, the process is ended. In this embodiment, the second preset time period may be 4s, and it is understood that two target signal segments separated by a longer time may be two accidental events, and the environment may generate continuous sound when a dangerous event occurs, such as continuous gunshot sound, or continuous distress sound, or earthquake sound. Therefore, in this step, when the method determines that the time interval between the two target signal segments is not greater than the second preset time, it determines that a dangerous event may occur in the environment where the mobile terminal is located, and then step 305 is executed.
And 305, controlling the mobile terminal to call a preset number.
In this step, when the time interval between the two target signal segments is not greater than the second preset time length, the method controls the mobile terminal to call a preset number, that is, when the method determines that there is a dangerous event in the environment where the mobile terminal is located, the mobile terminal is controlled to call the preset number. The preset number may be a number set by the user according to a requirement of the user, for example, a number of a family or a friend who can ask for help, which may be set by the user, or a default alarm number (e.g., "110"), which is not specifically limited in the embodiment of the present invention.
In this embodiment, the automatic danger detection method collects sound signals of an environment where the mobile terminal is located in real time; calculating the short-time energy value of each frame of sound signal; judging whether two target signal segments exist, wherein the short-time energy value is greater than a preset energy threshold value, and the duration time is greater than a first preset time; if the two target signal segments exist, judging whether the time interval between the two target signal segments is greater than a second preset time length; and if the time interval between the two target signal segments is not greater than the second preset time length, controlling the mobile terminal to call a preset number. Therefore, the method can judge whether the current environment is dangerous according to the sound signal of the environment where the mobile terminal is located, and control the mobile terminal to call the preset number for help under the condition that the current environment is dangerous, so that the timeliness of the help can be effectively guaranteed, and the possibility that the user is damaged is reduced.
Optionally, if the time interval between the two target signal segments is not greater than the second preset time duration, controlling the mobile terminal to call a preset number includes:
if the time interval between the two target signal segments is not greater than the second preset time length, providing a user interface at the mobile terminal for a user to select whether to call a preset number or not;
and if the call confirmation operation input by the user is received or if the call confirmation operation is not received within a third preset time, controlling the mobile terminal to call a preset number.
In this embodiment, when the method determines that the time interval between the two target signal segments is not greater than the second preset time duration, the method does not directly control the mobile terminal to call the preset number, but provides a user interface at the mobile terminal for a user to select whether to call the preset number, for example, the method may provide a user interface at the mobile terminal for the user to select whether to call the preset number may provide a selection interface at the mobile terminal for the user to select, the user may select on the selection interface provided at the mobile terminal, or may control the mobile terminal to prompt the user to select whether to call the preset number by voice, and the user may input voice information for selection. Therefore, when the user is inconvenient or cannot perform operation on the mobile terminal, the mobile terminal can be directly controlled to call the preset number in a voice input mode, and the user can conveniently and timely ask for help.
If the method receives a call confirmation operation input by a user, the method controls the mobile terminal to call the preset number, and the call confirmation operation may be a selection operation of selecting a confirmation call executed by the user on a selection interface provided on the mobile terminal, or preset voice information input by the user, such as voice information of yes, confirmation call, and the like.
It is understood that, in some embodiments of the present invention, the method may set a response time limit, for example, only in response to an operation performed by a user within a third preset time period, and for a case that no operation is performed within the third preset time period, the method may directly control the mobile terminal to call the preset number, or may not control the mobile terminal to call the preset number. Specifically, the user may preset a secondary operation for a case where the user does not operate within a third preset time period, for example, directly control the mobile terminal to call the preset number when the user does not operate within the third preset time period, or not control the mobile terminal to call the preset number when the user does not operate within the third preset time period. In the embodiment, the method controls the mobile terminal to call the preset number when the call confirmation operation is not received within the third preset time, so that the user can ask for help in time under the condition that the user is inconvenient to confirm the call.
Optionally, the providing a user interface at the mobile terminal for a user to select whether to call a preset number includes:
controlling the mobile terminal to prompt a user to select whether to call a preset number or not by voice;
if receiving a call confirmation operation input by a user, controlling the mobile terminal to call a preset number, including:
and if preset voice information input by a user is received, controlling the mobile terminal to call a preset number.
In this embodiment, the method may specifically be that the mobile terminal is controlled to prompt the user to select whether to call the preset number by using a voice prompt, and if preset voice information input by the user is received, the method controls the mobile terminal to call the preset number. Therefore, when the user is inconvenient or cannot perform operation on the mobile terminal, the mobile terminal can be directly controlled to call the preset number in a voice input mode, and the user can conveniently and timely ask for help.
Referring to fig. 4, fig. 4 is a schematic flow chart of another method for automatically detecting a danger according to an embodiment of the present invention, and as shown in fig. 4, the method includes:
step 401, collecting sound signals of the environment where the mobile terminal is located in real time.
Step 402, calculating a short-time energy value of each frame of sound signal.
The steps 401 and 402 are the same as the steps 301 and 302 in the embodiment shown in fig. 3 of the present invention, and are not described again here.
Step 403, determining the scene of the mobile terminal according to the sound signal of the environment where the mobile terminal is located.
In this step, the method determines the scene of the mobile terminal according to the sound signal of the environment where the mobile terminal is located. Specifically, the method may determine the scene where the mobile terminal is located according to the waveform of the sound signal of the environment where the mobile terminal is located. For example, as shown in fig. 5 and fig. 6, fig. 5 is a schematic diagram of a sound waveform in a noisy background environment according to an embodiment of the present invention, and fig. 6 is a schematic diagram of a sound waveform in a quiet background environment according to an embodiment of the present invention, it can be seen that, when amplitudes of other than a peak position are larger than a preset amplitude, for example, as shown in fig. 5, the method may determine that the mobile terminal is in a noisy background environment (for example, a noisy environment such as a mall, a station, and the like); conversely, when the amplitude other than the peak position is not greater than the preset amplitude, for example, as shown in fig. 6, the method may determine that the mobile terminal is in a quiet background environment (a quiet environment such as a playground).
It is understood that the method may also determine the scene where the mobile terminal is located from the features according to a plurality of different scenes, and is not limited to the scenes shown in fig. 5 and 6.
Step 404, determining that an energy threshold corresponding to a scene where the mobile terminal is located is a preset energy threshold, wherein different scenes correspond to different energy thresholds.
In this step, the method determines that an energy threshold corresponding to a scene where the mobile terminal is located is a preset energy threshold. In the embodiment of the invention, a plurality of different scenes and energy thresholds respectively corresponding to the scenes can be pre-stored in the mobile terminal, and the method acquires the energy threshold corresponding to the current scene of the mobile terminal from a plurality of energy values stored in the mobile terminal according to the scene of the mobile terminal and takes the energy threshold as the preset energy threshold.
In the embodiment of the invention, the method can collect background sound data in at least one scene in advance, then calculate the average value of the short-time energy values of the background sound data in the at least one scene, and multiply the average value of the short-time energy values in the at least one scene by the preset coefficient corresponding to the scene to be used as the energy threshold corresponding to the scene.
And 405, judging whether two target signal segments exist, wherein the short-time energy value is greater than a preset energy threshold value, and the duration time is greater than a first preset time.
In this step, the method determines whether there are two target signal segments with a short-time energy value greater than a preset energy threshold and a duration greater than a first preset time, and if there are two target signal segments with a short-time energy value greater than a preset energy threshold and a duration greater than the first preset time, executes step 406; conversely, if there are no two target signal segments with the short-time energy value greater than the preset energy threshold and the duration greater than the first preset time, the process ends or continues to execute step 405 until there are two target signal segments with the short-time energy value greater than the preset energy threshold and the duration greater than the first preset time, and execute step 406.
And step 406, judging whether the time interval between the two target signal segments is greater than a second preset time length.
In this step, if there are two target signal segments with a short-time energy value greater than a preset energy threshold and a duration greater than a first preset duration, the method further determines whether a time interval between the two target signal segments is greater than a second preset duration, and if the time interval between the two target signal segments is not greater than the second preset duration, executes step 407; and if the time interval between the two target signal segments is greater than the second preset time length, the process is ended.
Step 407, controlling the mobile terminal to call a preset number.
The steps 405 to 407 are the same as the steps 303 to 305 in the embodiment shown in fig. 3 of the present invention, and are not described again here.
In this embodiment, the automatic danger detection method collects sound signals of an environment where the mobile terminal is located in real time; calculating the short-time energy value of each frame of sound signal; determining the scene of the mobile terminal according to the sound signal of the environment where the mobile terminal is located; determining a corresponding preset energy threshold according to a scene where the mobile terminal is located, wherein different scenes correspond to different energy values, and whether two target signal segments exist, wherein the short-time energy value is greater than the preset energy threshold, and the duration time is greater than a first preset time; if the two target signal segments exist, judging whether the time interval between the two target signal segments is greater than a second preset time length; and if the time interval between the two target signal segments is not greater than the second preset time length, controlling the mobile terminal to call a preset number. Therefore, the method can judge the current environment of the mobile terminal according to the sound signal of the environment of the mobile terminal, judge whether the current environment is dangerous according to the sound signal and the environment of the mobile terminal, and control the mobile terminal to call the preset number for help under the condition of judging that the current environment is dangerous, so that the timeliness of help seeking can be effectively guaranteed, and the possibility that a user is damaged is reduced.
Optionally, the determining that the energy threshold corresponding to the scene where the mobile terminal is located is a preset energy threshold includes:
acquiring background sound data in at least one scene;
calculating an average value of short-time energy values of background sound data in the at least one scene;
and multiplying the average value of the short-time energy values under the at least one scene by a preset coefficient corresponding to the scene to serve as an energy threshold corresponding to the scene.
For example, in the embodiment of the present invention, the method may collect a sound file in a quiet environment as background noise data of the quiet environment, and calculate an average value E1 of short-term energy values in the quiet environment, and similarly, collect a sound file in a noisy environment as background noise data of the noisy environment, and calculate an average value E2 of short-term energy values in the noisy environment. For example, in a quiet environment, the method may determine a first preset coefficient E1 as an energy value corresponding to the quiet environment and a second preset coefficient E2 as an energy value corresponding to a noisy environment. In this embodiment, the first preset coefficient may be 3.5, and the second preset coefficient may be 1.5.
Optionally, before the determining whether there are two target signal segments in which the short-time energy value is greater than the preset energy threshold and the duration is greater than the first preset duration, the method further includes:
judging whether the short-time energy value of the sound signal is larger than a first energy value or not;
if the short-time energy value of the sound signal is larger than the first energy value, judging whether two target signal segments exist, wherein the short-time energy value is larger than a preset energy threshold value, and the duration time is larger than a first preset time length, and the first energy value is not larger than the preset energy threshold value.
In this embodiment, before determining whether there are two target signal segments with a short-time energy value greater than a preset energy threshold and a duration greater than a first preset time, the method further determines whether the short-time energy value of the sound signal is greater than a first energy value, and when the short-time energy value of the sound signal is greater than the first energy value, determines whether there are two target signal segments with a short-time energy value greater than a preset energy threshold and a duration greater than the first preset time, where the first energy value is not greater than the preset energy threshold. In some embodiments of the invention, the first energy value may be an energy value corresponding to a quiet environment, for example 3.5 × E1.
In this way, only when the short-time energy value of the sound signal is greater than the first energy value, the method further judges whether two target signal segments exist, wherein the short-time energy value is greater than the preset energy threshold value, and the duration time is greater than the first preset time.
Referring to fig. 7, fig. 7 is a schematic flowchart of another method for automatically detecting a risk according to an embodiment of the present invention, and as shown in fig. 7, the method includes:
and 701, acquiring sound signals of the environment where the mobile terminal is located in real time.
This step 701 is the same as step 301 shown in fig. 3 of the present invention, and is not described herein again.
Step 702, sampling the sound signal to obtain a plurality of frames of sound signals, wherein each frame of sound signal comprises a preset number of sampling points.
In this step, the method samples the sound signal to obtain a plurality of frames of sound signals, wherein each frame of sound signal includes a preset number of sampling points. In this embodiment, the preset number is 256, that is, the method samples the sound signals, and takes each acquired 256 sampling points as a frame of sound signals.
And 703, calculating the short-time energy values of the preset number of sampling points of each frame of sound signal.
In this step, the method calculates the short-time energy value of the preset number of sampling points of each frame of sound signal, and the calculation method has been described in detail in step 302 in the embodiment shown in fig. 3, and is not described again here.
And 704, judging whether two target signal segments exist, wherein the short-time energy value is greater than a preset energy threshold value, and the duration time is greater than a first preset time.
In this step, the method judges whether there are two target signal segments with the short-time energy value greater than a preset energy threshold and the duration greater than a first preset time, if there are two target signal segments with the short-time energy value greater than the preset energy threshold and the duration greater than the first preset time, execute step 705; conversely, if there are no two target signal segments with the short-time energy value greater than the preset energy threshold and the duration greater than the first preset time period, the process ends or continues to execute step 704 until there are two target signal segments with the short-time energy value greater than the preset energy threshold and the duration greater than the first preset time period, and execute step 705.
Step 705, judging whether the time interval between the two target signal segments is greater than a second preset time length.
In this step, if there are two target signal segments with a short-time energy value greater than a preset energy threshold and a duration greater than a first preset duration, the method further determines whether a time interval between the two target signal segments is greater than a second preset duration, and if the time interval between the two target signal segments is not greater than the second preset duration, executes step 706; and if the time interval between the two target signal segments is greater than the second preset time length, the process is ended.
Step 706, controlling the mobile terminal to call a preset number.
The steps 704 to 706 are the same as the steps 303 to 305 in the embodiment shown in fig. 3 of the present invention, and are not described again here.
Optionally, after controlling the mobile terminal to call a preset number, the method further includes:
acquiring geographical position information of the mobile terminal, and sending the geographical position information to the preset number; and/or
And opening a microphone and/or a camera of the mobile terminal, and sending audio collected by the microphone of the mobile terminal and/or images captured by the camera of the mobile terminal to the preset number.
In this embodiment, the method may further obtain the geographical location information of the mobile terminal after controlling the mobile terminal to call the preset number, and send the geographical location information to the preset number, so that a called party can conveniently know the geographical location where a dangerous condition occurs, and rescue can be performed more quickly.
The method can also be used for starting a microphone and/or a camera of the mobile terminal after controlling the mobile terminal to call the preset number; and sending the audio collected by the microphone of the mobile terminal and/or the image captured by the camera of the mobile terminal to the preset number. Therefore, the called party can conveniently know the situation in real time, and can make a rescue scheme or change the rescue scheme according to the real-time situation.
Those skilled in the art will appreciate that all or part of the steps of the method implementing the above-described embodiments may be implemented by hardware associated with at least one program instruction, where the at least one program may be stored in the memory 109 of the mobile terminal 100 shown in fig. 1 and can be executed by the processor 110, and the at least one program when executed by the processor 110 implements the following steps:
acquiring sound signals of the environment where the mobile terminal is located in real time;
calculating the short-time energy value of each frame of sound signal;
judging whether two target signal segments exist, wherein the short-time energy value is greater than a preset energy threshold value, and the duration time is greater than a first preset time;
if the two target signal segments exist, judging whether the time interval between the two target signal segments is greater than a second preset time length;
and if the time interval between the two target signal segments is not greater than the second preset time length, controlling the mobile terminal to call a preset number.
Optionally, if the time interval between the two target signal segments is not greater than the second preset time duration, controlling the mobile terminal to call a preset number includes:
if the time interval between the two target signal segments is not greater than the second preset time length, providing a user interface at the mobile terminal for a user to select whether to call a preset number or not;
and if the call confirmation operation input by the user is received or if the call confirmation operation is not received within a third preset time, controlling the mobile terminal to call a preset number.
Optionally, the providing a user interface at the mobile terminal for a user to select whether to call a preset number includes:
controlling the mobile terminal to prompt a user to select whether to call a preset number or not by voice;
if receiving a call confirmation operation input by a user, controlling the mobile terminal to call a preset number, including:
and if preset voice information input by a user is received, controlling the mobile terminal to call a preset number.
Optionally, before the two target signal segments, of which the short-time energy value is greater than the preset energy threshold and the duration is greater than the first preset duration, are determined to exist, when the at least one program is executed by the processor 110, the following steps may also be implemented:
determining the scene of the mobile terminal according to the sound signal of the environment where the mobile terminal is located;
and determining that an energy threshold corresponding to a scene where the mobile terminal is located is a preset energy threshold, wherein different scenes correspond to different energy thresholds.
Optionally, the determining that the energy threshold corresponding to the scene where the mobile terminal is located is a preset energy threshold includes:
acquiring background sound data in at least one scene;
calculating an average value of short-time energy values of background sound data in the at least one scene;
and multiplying the average value of the short-time energy values under the at least one scene by a preset coefficient corresponding to the scene to serve as an energy threshold corresponding to the scene.
Optionally, the calculating the short-time energy value of each frame of sound signal includes:
sampling the sound signals to obtain multi-frame sound signals, wherein each frame of sound signals comprises a preset number of sampling points;
and calculating the short-time energy value of the preset number of sampling points of each frame of sound signal.
Optionally, before the two target signal segments, of which the short-time energy value is greater than the preset energy threshold and the duration is greater than the first preset duration, are determined to exist, when the at least one program is executed by the processor 110, the following steps may also be implemented:
judging whether the short-time energy value of the sound signal is larger than a first energy value or not;
if the short-time energy value of the sound signal is larger than the first energy value, judging whether two target signal segments exist, wherein the short-time energy value is larger than a preset energy threshold value, and the duration time is larger than a first preset time length, and the first energy value is not larger than the preset energy threshold value.
Optionally, after controlling the mobile terminal to call the preset number, when the at least one program is executed by the processor 110, the following steps may be further implemented:
acquiring geographical position information of the mobile terminal, and sending the geographical position information to the preset number; and/or
And opening a microphone and/or a camera of the mobile terminal, and sending audio collected by the microphone of the mobile terminal and/or images captured by the camera of the mobile terminal to the preset number.
It will be understood by those skilled in the art that all or part of the steps of the method for implementing the above embodiments may be implemented by hardware associated with at least one program instruction, the at least one program may be stored in a computer readable storage medium, and the at least one program when executed comprises the steps of:
acquiring sound signals of the environment where the mobile terminal is located in real time;
calculating the short-time energy value of each frame of sound signal;
judging whether two target signal segments exist, wherein the short-time energy value is greater than a preset energy threshold value, and the duration time is greater than a first preset time;
if the two target signal segments exist, judging whether the time interval between the two target signal segments is greater than a second preset time length;
and if the time interval between the two target signal segments is not greater than the second preset time length, controlling the mobile terminal to call a preset number.
Optionally, if the time interval between the two target signal segments is not greater than the second preset time duration, controlling the mobile terminal to call a preset number includes:
if the time interval between the two target signal segments is not greater than the second preset time length, providing a user interface at the mobile terminal for a user to select whether to call a preset number or not;
and if the call confirmation operation input by the user is received or if the call confirmation operation is not received within a third preset time, controlling the mobile terminal to call a preset number.
Optionally, the providing a user interface at the mobile terminal for a user to select whether to call a preset number includes:
controlling the mobile terminal to prompt a user to select whether to call a preset number or not by voice;
if receiving a call confirmation operation input by a user, controlling the mobile terminal to call a preset number, including:
and if preset voice information input by a user is received, controlling the mobile terminal to call a preset number.
Optionally, before the determining whether there are two target signal segments with the short-time energy value greater than the preset energy threshold and the duration greater than the first preset duration, when the at least one program is executed, the following steps may also be implemented:
determining the scene of the mobile terminal according to the sound signal of the environment where the mobile terminal is located;
and determining that an energy threshold corresponding to a scene where the mobile terminal is located is a preset energy threshold, wherein different scenes correspond to different energy thresholds.
Optionally, the determining that the energy threshold corresponding to the scene where the mobile terminal is located is a preset energy threshold includes:
acquiring background sound data in at least one scene;
calculating an average value of short-time energy values of background sound data in the at least one scene;
and multiplying the average value of the short-time energy values under the at least one scene by a preset coefficient corresponding to the scene to serve as an energy threshold corresponding to the scene.
Optionally, the calculating the short-time energy value of each frame of sound signal includes:
sampling the sound signals to obtain multi-frame sound signals, wherein each frame of sound signals comprises a preset number of sampling points;
and calculating the short-time energy value of the preset number of sampling points of each frame of sound signal.
Optionally, before the determining whether there are two target signal segments with the short-time energy value greater than the preset energy threshold and the duration greater than the first preset duration, when the at least one program is executed, the following steps may also be implemented:
judging whether the short-time energy value of the sound signal is larger than a first energy value or not;
if the short-time energy value of the sound signal is larger than the first energy value, judging whether two target signal segments exist, wherein the short-time energy value is larger than a preset energy threshold value, and the duration time is larger than a first preset time length, and the first energy value is not larger than the preset energy threshold value.
Optionally, after controlling the mobile terminal to call the preset number, when the at least one program is executed, the following steps may be further implemented:
acquiring geographical position information of the mobile terminal, and sending the geographical position information to the preset number; and/or
And opening a microphone and/or a camera of the mobile terminal, and sending audio collected by the microphone of the mobile terminal and/or images captured by the camera of the mobile terminal to the preset number.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (8)

1. A method for automatically detecting danger is applied to a mobile terminal, and is characterized in that the method comprises the following steps:
acquiring sound signals of the environment where the mobile terminal is located in real time;
calculating the short-time energy value of each frame of sound signal;
judging whether two target signal segments exist, wherein the short-time energy value is greater than a preset energy threshold value, and the duration time is greater than a first preset time;
if the two target signal segments exist, judging whether the time interval between the two target signal segments is greater than a second preset time length;
if the time interval between the two target signal segments is not greater than the second preset time length, controlling the mobile terminal to call a preset number;
before the step of judging whether two target signal segments exist, wherein the short-time energy value is greater than the preset energy threshold value and the duration is greater than the first preset duration, the method further comprises the following steps:
determining the scene of the mobile terminal according to the sound signal of the environment where the mobile terminal is located;
determining an energy threshold corresponding to a scene where the mobile terminal is located as a preset energy threshold, wherein different scenes correspond to different energy thresholds;
the determining that the energy threshold corresponding to the scene where the mobile terminal is located is a preset energy threshold includes:
acquiring background sound data in at least one scene;
calculating an average value of short-time energy values of background sound data in the at least one scene;
and multiplying the average value of the short-time energy values under the at least one scene by a preset coefficient corresponding to the scene to serve as an energy threshold corresponding to the scene.
2. The method according to claim 1, wherein the controlling the mobile terminal to call a preset number if the time interval between the two target signal segments is not greater than the second preset time period comprises:
if the time interval between the two target signal segments is not greater than the second preset time length, providing a user interface at the mobile terminal for a user to select whether to call a preset number or not;
and if the call confirmation operation input by the user is received or if the call confirmation operation is not received within a third preset time, controlling the mobile terminal to call a preset number.
3. The method for automatically detecting a danger according to claim 2, wherein said providing a user interface at the mobile terminal for a user to select whether to call a preset number comprises:
controlling the mobile terminal to prompt a user to select whether to call a preset number or not by voice;
if receiving a call confirmation operation input by a user, controlling the mobile terminal to call a preset number, including:
and if preset voice information input by a user is received, controlling the mobile terminal to call a preset number.
4. The method for automatically detecting a danger according to claim 1, wherein said calculating the short-time energy value of each frame of the sound signal comprises:
sampling the sound signals to obtain multi-frame sound signals, wherein each frame of sound signals comprises a preset number of sampling points;
and calculating the short-time energy value of the preset number of sampling points of each frame of sound signal.
5. The method of automatically detecting a hazard of claim 1, wherein said determining whether there are two target signal segments having a short-term energy value greater than a predetermined energy threshold and a duration greater than a first predetermined duration, further comprises:
judging whether the short-time energy value of the sound signal is larger than a first energy value or not;
if the short-time energy value of the sound signal is larger than the first energy value, judging whether two target signal segments exist, wherein the short-time energy value is larger than a preset energy threshold value, and the duration time is larger than a first preset time length, and the first energy value is not larger than the preset energy threshold value.
6. The automatic danger detecting method according to any one of claims 1 to 5, wherein after said controlling the mobile terminal to call a preset number, the method further comprises:
acquiring geographical position information of the mobile terminal, and sending the geographical position information to the preset number; and/or
And opening a microphone and/or a camera of the mobile terminal, and sending audio collected by the microphone of the mobile terminal and/or images captured by the camera of the mobile terminal to the preset number.
7. A mobile terminal, characterized in that it comprises a memory, at least one processor and at least one program stored on said memory and executable on said at least one processor, said at least one program, when executed by said at least one processor, implementing the steps of the method of any of the preceding claims 1-6.
8. A computer-readable storage medium storing at least one program executable by a computer, the at least one program, when executed by the computer, causing the computer to perform the steps of the method of any one of claims 1 to 6.
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