JP2018037963A - Wearable camera system and video recording control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start the recording of a video captured by a wearable camera without an active recording operation of a user to thereby reduce the omission of the video recording.SOLUTION: A wearable camera system includes: a wearable camera 10 which can be attached to or held by a user; and a headquarter device connectable to the wearable camera 10 through a communication path. The headquarter device includes: a DTMF generation unit 96 for generating instruction information by a voice signal; a police radio base station device 97 for transmitting a first recording start instruction by the voice signal; and a back-end client 95 for transmitting a second recording start instruction by a communication code. At least one of the first and second recording instructions is transmitted to the wearable camera 10. When receiving the first or the second recording start instruction transmitted from the headquarter device, the wearable camera 10 starts to record a video of a subject captured by an imaging unit.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a wearable camera system and a recording control method for controlling recording of a video imaged by a wearable camera.

  In recent years, in order to efficiently support the operations of police officers and guards, for example, an operation for wearing or carrying a wearable camera by a police officer during a patrol has been studied.

  As a prior art using a wearable camera, for example, there is a wearable surveillance camera system described in Patent Document 1. The wearable surveillance camera system disclosed in Patent Document 1 can store an image (video) signal and an audio signal from a CCD camera and microphone attached to the body, and a date / time information signal from a built-in clock in a pouch attached to the body. The date and time information encoded by the encoding server and converted into character information is superimposed on the captured image and can be recorded.

JP 2006-148842 A

  Here, the case where the wearable camera of patent document 1 is mounted | worn with and used for a police officer is assumed. When a police officer wears the wearable camera of Patent Document 1 on his body and uses a surveillance object such as a suspicious person or a stolen car, the police officer presses the recording switch to record image data (image signal). It is assumed that recording starts.

  However, if an incident occurs suddenly, police officers must rush to deal with the incident in light of the importance of initial action or initial investigation. In the configuration of Patent Document 1, if the user forgets to record the video without having enough time to press the recording switch of the wearable camera at the scene of the incident, the recording may be omitted as a result. In other words, it is not possible to leave a video recording of the scene of the incident and the suspects etc. on the wearable camera, and the video of the incident cannot be obtained, so the police station having jurisdiction responds promptly and appropriately to the occurrence of the incident. However, there was a problem that it was difficult to resolve the case early. Moreover, if the evidence video is not recorded, sufficient evidence cannot be presented in a later trial or the like, which may cause great trouble.

  The present invention has been devised in view of the above-described conventional circumstances, and starts recording of a video imaged by a wearable camera without the user's own operation of recording, thereby reducing recording omissions. It is an object of the present invention to provide a wearable camera system and a recording control method that efficiently support video recording.

  The present invention is a wearable camera system having a wearable camera that can be worn or possessed by a user and a headquarter device that can be connected to the wearable camera via a communication path, and the wearable camera captures an image of a subject. And a recording unit that records the captured video of the subject, and a receiving unit that receives an instruction from the headquarter device, wherein the headquarter device generates voice command generation information by a voice signal. A first transmission unit that transmits a first recording start instruction based on the audio signal, and a second transmission unit that transmits a second recording start instruction based on a communication code, and the first recording start instruction At least one of the second recording start instructions is transmitted to the wearable camera, and the wearable camera is connected to the headquarter device. When receiving the al transmitted the first recording start instruction or the second recording start instruction to start the video recording of the subject captured by the imaging unit, to provide a wearable camera system.

  Further, the present invention is a recording control method in a wearable camera system comprising a wearable camera that can be worn or possessed by a user and a headquarter device that can be connected to the wearable camera via a communication path, the headquarter device comprising: Generating instruction information by an audio signal, and transmitting at least one recording start instruction of the first recording start instruction by the audio signal and the second recording start instruction by a communication code to the wearable camera. The wearable camera images a subject and starts recording the captured video of the subject when receiving the first recording start instruction or the second recording start instruction transmitted from the headquarter device. A recording control method is provided.

  According to the present invention, it is possible to start recording a video imaged by a wearable camera and reduce omissions of recording without the user's own video recording operation, thereby efficiently supporting the work. Can do.

Explanatory drawing which shows an example of the outline | summary of the wearable camera system of this embodiment The figure which shows an example of the upper body of the police officer who equipped the wearable camera of this embodiment The front view which shows an example of the surface of the front side of the housing | casing of the wearable camera of this embodiment The block diagram which shows an example of an internal structure of the wearable camera of this embodiment 1 is a block diagram showing an example of a system configuration in a usage state of a wearable camera system according to an embodiment The block diagram which shows an example of a structure of the command system of this embodiment It is a figure which shows an example of the DTMF signal used in this embodiment, (A) is a figure which shows an example of a signal format, (B) is a figure which shows the specific example of the value of each signal block. Sequence diagram showing an example of a recording start procedure in the wearable camera system of the first embodiment Sequence diagram showing an example of a recording start procedure in the wearable camera system of the second embodiment The block diagram which shows an example of a structure of the wearable camera and police radio terminal of 3rd Embodiment Sequence diagram showing an example of a recording start procedure in the wearable camera system of the third embodiment The flowchart which shows an example of the video recording process in the wearable camera of this embodiment A flowchart showing an example of a recording process in the back-end client of this embodiment

  Hereinafter, an embodiment (hereinafter referred to as “the present embodiment”) that specifically discloses a wearable camera system and a recording control method according to the present invention will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

  FIG. 1 is a diagram illustrating an example of an outline of the wearable camera system 5 of the present embodiment. The wearable camera system 5 includes an in-vehicle camera system (ICV: In Car Video system) 30 mounted on a police car (that is, an abbreviation for a patrol car) 7 and a wearable camera (BWC) mounted on the uniform of the police officer 3. Body-Worn Camera) 10 and an in-station system 8 installed in the police station 4.

  The in-vehicle camera system 30 includes one or a plurality of in-vehicle cameras 31, an in-vehicle PC (Personal Computer) 32, and an in-vehicle recorder 33. The in-vehicle camera system 30 captures images based on captured images of incidents encountered while traveling in the police car 7. Record. One or a plurality of in-vehicle cameras 31 are, for example, one or a plurality of cameras that are installed so as to capture the front of the police car 7, and each camera that is disposed so as to capture the left, right, and rear of the police car. including. The in-vehicle PC 32 controls the operations of the in-vehicle camera 31 and the in-vehicle recorder 33 in accordance with an instruction operated by the police officer 3. The in-vehicle recorder 33 records video data captured by the plurality of in-vehicle cameras 31 in time series.

  The in-vehicle camera system 30 is wirelessly connected to a back-end server (BES: Back End Server) 50 in the in-station system 8 and selects specific video data from the video data recorded in the in-vehicle recorder 33 for back end. It can be transmitted to the server 50. The in-vehicle camera system 30 is communicably connected to the wearable camera 10 and records video data captured by the wearable camera 10 and collected sound data in the in-vehicle recorder 33. In the following description, it is assumed that the voice data includes, for example, gunshots when a handgun held by a suspect or criminal of a case fires during patrol or at the scene of the case.

  Wearable camera 10 is attached to the uniform of police officer 3 who is a user, images the front of police officer as a subject, and transmits the captured video data and collected sound data to in-vehicle camera system 30. Hereinafter, the subject to be imaged by the wearable camera 10 and the in-vehicle camera 31 is not limited to a person, but a scene at the scene of the incident, a crowd crowded near the scene (so-called field horses), and an atmosphere around the imaging position. Is also included. The police officer 3 possesses a police radio terminal 35 as an example of a radio communication terminal that receives a command from the command system 90. Normally, the police officer 3 carries the police radio terminal 35 to the scene during activities outside the police station, such as when rushing to the scene during a patrol or when an incident occurs. The police officer 3 may have a smartphone 40 as an example of a communication terminal that can communicate with the wearable camera 10. The smartphone 40 has a telephone function and a wireless communication function, and is used as an example of a mobile terminal that is used for general purposes, for example, in an emergency contact from a police station or an emergency contact to a police station.

  The wearable camera 10 is connected to the back-end server 50 directly via the in-vehicle camera system 30 or via the smartphone 40 or the wireless LAN (Local Area Network) access point 45, so that video data and audio data are obtained. Can be transmitted to the back-end server 50. The smartphone 40 is connected to the back end server 50 via a mobile communication network or the Internet network. The wireless LAN access point 45 is connected to the back-end server 50 via a wired or wireless network (such as the Internet network). In addition, the wearable camera 10 can be manually attached to a collective charging stand 68 described later, thereby transmitting video data and audio data to the back-end server 50.

  The in-station system 8 includes a back-end server 50, a back-end streaming server (BSS) 65, a back-end client (BEC) 70, a wireless LAN access, which are installed inside the police station 4. The configuration includes a point 63, a collective charging stand 68, and a command system 90.

  The back-end server 50 is configured to include a computer and a storage, and manages incident evidence videos. For example, the back-end server 50 has a face recognition function for recognizing a face in an image frame that constitutes an image captured by the wearable camera 10 or the in-vehicle camera 31, and cut-out data ( And a voice recognition function for recognizing voice data included in the data (see below). Further, the back-end server 50 has a voice database (not shown) in which predetermined voice data related to patrol or an incident (that is, voice data having a high possibility of being generated during patrol or at the scene of the incident) is registered. The default voice data related to patrols or incidents includes, for example, gunshots when fired by suspects or police officers, or voices issued by police officers who have been instructed in advance to be issued when they feel dangerous in the event of a patrol or incident. , Voice data such as a sound when a police officer falls to the ground or the like (for example, “Dosatsu”) is included. The back-end server 50 performs voice recognition on voice data included in cut-out data (described later) transmitted from the in-vehicle camera system 30 or the wearable camera 10, and is registered in the voice and voice database obtained by voice recognition. Check the voice. In addition, as long as the back-end server 50 can access, the storage which memorize | stores an audio | voice database may be installed in the police station 4, and may be installed in the exterior of the police station 4.

  The back-end streaming server 65 receives the video data streamed from the wearable camera 10 and transfers it to the back-end server 50. Further, the back-end streaming server 65 may receive video data streamed from the in-vehicle camera system 30 and transfer it to the back-end server 50.

  The back-end client 70 is composed of, for example, a PC, accesses a suspicious person database (not shown) of the back-end server 50, searches for information related to an incident such as a criminal, and displays the search result as a display device (for example, a back-end client 70 has a browser capable of being displayed on a liquid crystal display (LCD) provided in advance. The suspicious person database is registered in advance in association with information (for example, case number) for identifying a case by, for example, a person being nominated or a past criminal. Further, the back-end client 70 can access the voice database of the back-end server 50 and search for information related to an incident such as a criminal. The back-end client 70 may be installed not only inside the police station 4 but also outside the police station 4. Further, the back-end client 70 may be either a thin client PC or a rich client PC.

  The wireless LAN access point 63 is wirelessly connected to the in-vehicle camera system 30 and the wearable camera 10 via a wireless LAN (W-LAN), and the video data and audio data recorded in the in-vehicle camera system 30 and the wearable camera 10 are recorded. Video data and audio data are transferred to the back-end server 50.

  The collective charging stand 68 can be worn with wearable cameras 10 worn or possessed by a plurality of police officers 3, charges the power of the individual wearable cameras 10 attached, and performs wired communication with the wearable cameras 10. And the video data and audio data stored in the wearable camera 10 are transmitted to the back-end server 50. The collective charging stand 68 is wired to the back-end server 50 via a USB (Universal Serial Bus) cable.

  The command system 90 includes a police radio base station device as an example of a radio communication device, is connected to the back-end server 50, and transmits a command to various places managed by the police station 4. The police station 4 is provided with a police radio system for transmitting a command to each police officer. When an incident occurs, the command system 90, for example, in response to an instruction from the back-end server 50, responds to the police car 7 on which the police officer who is dispatched to the scene of the incident gets on or the police radio terminal 35 possessed by the police officer. Various dispatch commands, such as on-site express, on-site security, suspected security, and support for police officers who arrive at the site, are transmitted wirelessly. The command system 90 may issue a command to a police officer dispatched to the scene of the incident according to an instruction input by the police officer. Further, the command system 90 does not have to be directly connected to the back-end server 50. When an incident occurs, the command system 90 is independent from the back-end server 50 and is sent from the police radio base station device to the scene of the incident. The above-mentioned various dispatch commands may be transmitted to the police car 7 or police radio terminal 35 to be dispatched.

  When the in-vehicle camera system 30 is used in the wearable camera system 5, the wearable camera 10 is connected to the in-vehicle camera system 30 so as to be able to transfer data by short-range wireless communication or wired communication using a signal cable such as USB. . The video data captured by the wearable camera 10 and the collected audio data are transferred to the in-vehicle camera system 30, reproduced, recorded, or recorded by the in-vehicle camera system 30, and transmitted to the back-end server 50.

  The in-vehicle camera system 30 records the video data captured by the in-vehicle camera 31 and the video data and audio data captured by the wearable camera 10 in the in-vehicle recorder 33, and cuts out a section of the sound collected by the wearable camera 10. Cut data including the cut voice is transmitted to the back-end server 50 via the wireless LAN. When a loud sound suddenly appears, the voice segment is cut out so as to include the voice. It should be noted that the audio section may be cut out so that a certain section is sampled at a certain period. In this case, only a sound with a small surrounding volume is cut out in a section where no sudden sound appears.

  In the wearable camera system 5, when the wearable camera 10 is directly connected to a network and used, the wearable camera 10 is connected to the wireless LAN access point 45 or the smartphone 40 so that data can be transferred. The connection between the wearable camera 10 and the smartphone 40 is, for example, short-range wireless communication such as BLE (Bluetooth (registered trademark) Low Energy), or tethering that allows one of the wearable camera 10 or the smartphone 40 to function as a wireless LAN access point. Wireless LAN communication is used. The wearable camera 10 transmits the recorded video data and audio data to the backend server 50 via the wireless LAN access point 45 or the smartphone 40.

  The police officer 3 returns to the police station 4 and attaches the wearable camera 10 to the collective charging stand 68, so that the collective charging stand 68 charges the wearable camera 10 and attaches to the wearable camera 10 via the USB cable. The recorded video data and audio data can be transmitted to the back-end server 50.

  When the back-end server 50 receives the video data via the back-end streaming server 65 or directly from the wearable camera 10 or the in-vehicle camera system 30, the back-end server 50 records and accumulates the transmitted video data in the storage. Further, when the back-end server 50 receives the cut-out data from the in-vehicle camera system 30 and the wearable camera 10, the back-end server 50 recognizes the voice included in the cut-out data, and registers the predetermined voice data regarding the patrol or the case in the pre-registered voice database. The voice is collated and the result of the collation is notified to the in-vehicle camera system 30 and the wearable camera 10.

  Further, when the police officer 3 operates the back-end client 70 and requests the back-end server 50 to search for sound related to the incident, the back-end server 50 responds to the request from the back-end client 70. Inquires about the voice registered in the voice database.

  FIG. 2 is a diagram illustrating an example of the upper body of the police officer 3 wearing the wearable camera 10 of the present embodiment. Wearable camera 10 is placed in front of the uniform of police officer 3 so that the front of police officer 3 can be imaged. For example, the wearable camera 10 may be fixed to the front part of the uniform in a state where it is suspended from the neck with a string, or an attachment (for example, attachment) attached to the back surface of the housing 10z of the wearable camera 10 (see FIG. 3). For example, the clip may be fixed to the front part of the uniform by engaging the attachment tool attached to the front part of the uniform.

  FIG. 3 is a front view showing an example of the front side surface of the housing 10z of the wearable camera 10 of the present embodiment. A recording switch SW1, a snapshot switch SW2, and an imaging lens 11z are arranged on the front surface of the housing 10z. The recording switch SW1 is instructed to start recording by being pressed for a short time, and instructed to stop recording by being pressed for a long time (for example, an operation in which the pressing state is continued for 3 seconds). Each time the snapshot switch SW2 is pressed, the snapshot switch SW2 instructs to record a still image captured by the imaging unit 11. The imaging lens 11z forms an optical image of a subject imaged by the wearable camera 10 on the imaging surface of the imaging unit 11 (see FIG. 4).

  A communication mode switch SW3 and an attribute information giving switch SW4 are arranged on the side surface of the housing 10z. Three LEDs 26a, 26b, and 26c are arranged on the upper surface of the housing 10z. The LED 26a displays the power on / off state of the wearable camera 10 and the state of the battery 25 (see FIG. 4). The LED 26b displays the state of the imaging operation of the wearable camera 10. The LED 26c displays the state of the communication mode of the wearable camera 10.

  FIG. 4 is a block diagram illustrating an example of an internal configuration of the wearable camera 10 according to the present embodiment. The wearable camera 10 includes an imaging unit 11, a GPIO 12 (General Purpose Input / Output), a RAM (Random Access Memory) 13, a ROM (Read Only Memory) 14, and a storage unit 15. The wearable camera 10 includes an EEPROM (Electrically Erasable Programmable ROM) 16, an RTC (Real Time Clock) 17, and a GPS (Global Positioning System) receiver 18. The wearable camera 10 includes an MCU (Micro Controller Unit) 19, a communication unit 21, a USB interface (I / F) 22, a contact terminal 23, a power supply unit 24, and a battery 25.

  The wearable camera 10 includes a recording switch SW1, a snapshot switch SW2, a communication mode switch SW3, and an attribute information addition switch SW4.

  The wearable camera 10 includes three LEDs (Light Emitting Diodes) 26a, 26b, and 26c, and a vibrator 27.

  The imaging unit 11 includes an imaging lens 11z (see FIG. 3) and a solid-state imaging device such as a CCD (Charge Coupled Device) type image sensor or a CMOS (Complementary Metal Oxide Semiconductor) type image sensor. The imaging unit 11 outputs the subject image data obtained by imaging to the MCU 19.

  The GPIO 12 is a parallel interface. The GPIO 12 is connected to a recording switch SW1, a snapshot switch SW2, a communication mode switch SW3, an attribute information assignment switch SW4, LEDs 26a, 26b, and 26c, a vibrator 27, an LCD 28, an earphone terminal 29C, a speaker 29B, and a microphone 29A. The GPIO 12 inputs and outputs signals between these various electronic components and the MCU 19. The microphone 29 </ b> A as an example of the receiving unit and the sound collection unit collects sound around the wearable camera 10 and outputs sound data of the collected sound to the MCU 19 via the GPIO 12. Note that the microphone 29 </ b> A may be a built-in microphone housed in the housing 10 z of the wearable camera 10 or a wireless microphone wirelessly connected to the wearable camera 10. In the case of a wireless microphone, the sound pickup performance can be improved by attaching the police officer to an arbitrary location. The gyro sensor GY, the acceleration sensor AC, and the AD converter CV are connected to the MCU 19 by an I2C (Inter-Integrated Circuit) 20 as an example of a communication interface.

  The RAM 13 is a work memory used in the operation of the MCU 19, for example. The ROM 14 stores in advance a program and data for controlling the MCU 19, for example.

  The storage unit 15 as an example of a recording unit is configured by a storage medium such as a memory card, for example, and records video data captured by the imaging unit 11 based on an instruction to start automatic recording (that is, an instruction to start recording). Start. The storage unit 15 always stores pre-buffered video data for a predetermined time, for example, and continues to store video data up to 30 seconds before the current time, for example. When receiving a recording start instruction, the storage unit 15 starts recording video data and continues recording video data thereafter until receiving a recording stop instruction. The storage unit 15 has a setting data file in which resolution-up information and the like are set. For example, when the storage unit 15 is configured by a memory card, the storage unit 15 is detachably attached to the housing 10z of the wearable camera 10.

  The EEPROM 16 stores, for example, identification information for identifying the wearable camera 10 (for example, a serial number as a Camera ID) and various setting information. The RTC 17 counts the current time information and outputs it to the MCU 19.

  The GPS receiver 18 receives the current position information and time information of the wearable camera 10 (own device) from a GPS transmitter (not shown) and outputs the received information to the MCU 19. The time information is also used for correcting the system time of the wearable camera 10. The system time is used for recording the imaging time of captured images (including still images and moving images).

  The MCU 19 has a function as a control unit of the wearable camera 10, for example, control processing for overall control of operations of each unit of the wearable camera 10, data input / output processing with each unit of the wearable camera 10, Data calculation (calculation) processing and data storage processing are performed. The MCU 19 operates according to programs and data stored in the ROM 14. During operation, the MCU 19 uses the RAM 13 to obtain current time information from the RTC 17 and obtain current position information from the GPS receiver 18.

  The MCU 19 includes a detection unit 19z that can be realized by executing an application program. The detection unit 19z is used to generate audio data obtained by cutting out an audio section from the audio data collected by the microphone 29A. In addition, the detection unit 19z detects an instruction based on an audio signal such as a DTMF signal described later in the analog audio data collected by the microphone 29A. The MCU 19 causes the wearable camera 10 to execute an operation corresponding to the instruction acquired by the detection unit 19z.

  The communication unit 21 transmits the audio data generated by the detection unit 19z to the back-end server 50. For example, in the physical layer which is the first layer of the OSI (Open Systems Interconnection) reference model, the communication unit 21 and the MCU 19 Specify the connection with The communication unit 21 performs, for example, wireless communication using BLE or wireless communication using a wireless LAN (for example, Wi-fi (registered trademark)) in accordance with this rule. The communication unit 21 functions as a receiving unit that receives instructions from the command system 90. The communication unit 21 may perform short-range wireless communication such as NFC (Near Field Communication).

  The USB interface 22 is a serial bus, and can be connected to, for example, the in-vehicle camera system 30 and the back-end client 70 in the police station.

  The contact terminal 23 is a terminal for electrically connecting to a cradle (not shown), an external adapter (not shown) or the like, connected to the MCU 19 via the USB interface 22 and also connected to the power supply unit 24. The The contact terminal 23 can charge the battery 25 via the contact terminal 23 and can communicate image data and the like.

  The contact terminal 23 is provided with, for example, “charging terminal V +”, “CON.DET terminal”, “data terminals D−, D +” and “ground terminal” (all not shown). CON. The DET terminal is a terminal for detecting a voltage and a voltage change. The data terminals D− and D + are terminals for transferring an image captured by the wearable camera 10 to an external PC or the like via, for example, a USB connector terminal. CON. Which is the detection terminal of the contact terminal 23. The DET terminal is connected to the I2C 20 via the AD converter CV, and the detection voltage value of the contact terminal 23 is input to the MCU 19.

  By connecting the contact terminal 23 and a connector of a cradle (not shown) or an external adapter (not shown), data communication is possible between the wearable camera 10 and an external device.

  For example, the power supply unit 24 supplies the battery 25 with power supplied from a cradle or an external adapter via the contact terminal 23 to charge the battery 25. The battery 25 is constituted by a rechargeable secondary battery, for example, and supplies power to each part of the wearable camera 10.

  The recording switch SW1 is a push button switch for inputting an operation instruction for starting / stopping recording (moving image capturing) by a pressing operation of the police officer 3, for example. For example, when the recording switch SW1 is pressed an odd number of times, recording (moving image capturing) starts, and when the recording switch SW1 is pressed an even number of times, the recording ends. When pressed twice in succession, the recording switch SW1 functions as an emergency button, as will be described later.

  The snapshot switch SW2 is a push button switch for inputting an operation instruction for capturing a still image by a pressing operation of the police officer 3, for example. For example, each time the snapshot switch SW2 is pressed, a still image is captured when the snapshot switch SW2 is pressed.

  The communication mode switch SW3 is a slide switch that inputs an operation instruction for setting a communication mode between the wearable camera 10 and an external device, for example. The communication mode includes, for example, an access point mode, a station mode, and an OFF mode.

  The access point mode is a mode in which the wearable camera 10 operates as a wireless LAN access point and communicates between the wearable camera 10 and the smartphone 40 by wireless connection with the smartphone 40 possessed by the police officer 3, for example. In the access point mode, the smartphone 40 can display the current live image, play the recorded image, display the captured still image, and the like by the wearable camera 10 by connecting to the wearable camera 10.

  The station mode is a mode for communicating with an external device as an access point when connecting to the external device using a wireless LAN. For example, the smartphone 40 may be set as an external device using the tethering function of the smartphone 40. In the station mode, the wearable camera 10 sends various settings, transfer (upload) of recorded images held by the wearable camera 10 to the back-end client 70 and the back-end server 50 in the in-vehicle camera system 30 and the police station 4. Can be done against.

  The OFF mode is a mode in which the wireless LAN communication operation is turned off and the wireless LAN is not used.

  The attribute information giving switch SW4 is a push button switch operated to give attribute information to the video data.

  The LED 26 a is a display unit that indicates a power-on state (on / off state) of the wearable camera 10 and a state of the battery 25, for example. LED26b is a display part which shows the state (recording state) of the imaging operation of the wearable camera 10, for example. LED26c is a display part which shows the state of the communication mode of the wearable camera 10, for example. Further, when the wearable camera 10 receives notification data from the back-end server 50, the three LEDs 26a to 26c perform a blinking operation in accordance with an instruction from the MCU 19. At this time, the MCU 19 changes the blinking pattern of the LEDs 26 a to 26 c according to the information regarding the sound source included in the notification data.

  The gyro sensor GY detects the angular velocity (that is, the rotation angle per unit time) of the wearable camera 10, and detects, for example, that the police officer 3 wearing or carrying the wearable camera 10 has fallen (Man Down). The detection result of the gyro sensor GY is input to the MCU 19 via the I2C20. The wearable camera 10 uses the gyro sensor GY to perform behavior related to the rotation of the police officer 3 wearing or carrying the wearable camera 10 (for example, falling to the ground, being shot with a handgun and falling to the ground, weapons Can be detected with high accuracy).

  The acceleration sensor AC detects accelerations in the three-axis directions (so-called x-axis, y-axis, and z-axis) of the orthogonal coordinate system of the wearable camera 10, and for example, the police officer 3 wearing or carrying the wearable camera 10 falls It detects that it has started (Man Down), has started running, and that the police officer 3 is in a shooting position by holding a handgun. The detection result of the acceleration sensor AC is input to the MCU 19 via the I2C20. The wearable camera 10 can accurately detect a behavior related to the movement or posture of the police officer 3 wearing or holding the wearable camera 10 by using the acceleration sensor AC.

  The MCU 19 detects input of each of the recording switch SW1, the snapshot switch SW2, the communication mode switch SW3, and the attribute information addition switch SW4, and performs processing for the switch input that has been operated.

  When the MCU 19 detects an operation input of the recording switch SW1, the MCU 19 controls the start or stop of the imaging operation in the imaging unit 11, and stores the image obtained from the imaging unit 11 in the storage unit 15 as a moving image.

  When the MCU 19 detects an operation input of the snapshot switch SW2, the MCU 19 stores an image by the imaging unit 11 when the snapshot switch SW2 is operated in the storage unit 15 as a still image.

  The MCU 19 detects the state of the communication mode switch SW3 and operates the communication unit 21 in a communication mode according to the setting of the communication mode switch SW3.

  When the attribute information addition switch SW4 is pressed, the MCU 19 provides the attribute information to the cut-out data including the face image cut out from the image captured by the imaging unit 11.

  FIG. 5 is a block diagram illustrating an example of a system configuration in the usage state of the wearable camera system 5 of the present embodiment. When the wearable camera 10 starts recording, the recording operation can be started not only by the operation of the recording switch SW1 of the housing 10z but also by an instruction from the outside. The wearable camera 10 is connected to a network 67 via a wireless LAN access point 45 (mobile access point in the illustrated example) or a smartphone 40, and via a VPN router 66, a back-end streaming server 65, a back-end server 50, and a command system. 90. The command system 90 has a function as a head office device, and includes a back-end client 95 and a police radio base station device 97 as an example of a radio communication device.

  The wearable camera 10 can input a DTMF (Dual Tone Multiple Frequency) signal based on the output sound from the police radio terminal 35 through the microphone 29A. A command by voice from the police radio base station device 97 of the command system 90 is transmitted to the police radio terminal 35 and is output from the speaker of the police radio terminal 35 as a voice. The police radio base station apparatus 97 transmits a DTMF signal corresponding to an instruction to start recording or the like to the police radio terminal 35 as a first recording start instruction based on the operation of the operator 98 in the command room. Thus, an instruction using a DTMF signal can be notified. The instruction to start recording or the like by the DTMF signal is generated by, for example, an operation of the operator 98, a DTMF signal corresponding to the instruction is generated in the back-end client 95 or the police radio base station apparatus 97, and the target wearable camera from the police radio base station apparatus 97 10 to the police radio terminal 35. Here, the back-end client 95 of the command system 90 constitutes a headquarter device, and the headquarter device may include a police radio base station device 97. The wearable camera 10 and the headquarter apparatus are configured to be connectable via various communication paths such as a network 67, a wireless transmission path by wireless LAN or BLE, and a wireless communication path of police radio.

  The back-end client 95 of the command system 90 is connected to the back-end server 50, and as a second recording start instruction from the back-end server 50 via the network 67, the IP ( An instruction such as recording start by an Internet Protocol) command can be transmitted to the wearable camera 10. For example, an instruction such as recording start by the IP command is generated in the back-end client 95 or the back-end server 50 by the operation of the back-end client 95 of the operator 98, and is sent to the target wearable camera 10 via the network 67. Is transmitted.

  The wearable camera 10 is connected to the wireless LAN access point 45 by a wireless LAN (W-LAN), and is connected to the smartphone 40 by a wireless LAN or BLE. Further, when the wearable camera 10 is connected to the in-vehicle camera system 30, the wearable camera 10 is directly connected to the in-vehicle camera system 30a via a wireless LAN, or via a relay device (CTB: Common Trigger Box) 36 by BLE. Connected to the system 30b.

  When a recording start operation is performed by the operator 98 in the command room, the back-end client 95 of the command system 90 generates a DTMF signal indicating a recording start instruction, and the DTMF signal is transmitted from the police radio base station device 97 to the police radio terminal 35. Is transmitted to the wearable camera 10 via the police radio terminal 35, and a recording start instruction using a DTMF signal as a first recording start instruction is transmitted. Further, the back-end client 95 transmits a recording start instruction based on an IP command as a second recording start instruction, and transmits the IP command to the wearable camera 10 via the wireless LAN access point 45 or the smartphone 40 via the network 67. Transmit the recording start instruction. Similar to the recording start instruction, a recording stop instruction by a DTMF signal or an IP command can be transmitted from the command system 90 to the wearable camera 10. An example of the procedure for transmitting the recording start instruction by the DTMF signal and the recording start instruction by the IP command will be described later.

  FIG. 6 is a block diagram illustrating an example of the configuration of the command system 90 of the present embodiment. The command system 90 is configured to include a back-end client 95 and a police radio base station device 97. The back-end client 95 is configured by a PC, for example, and includes a CPU 951, an I / O control unit 952, a communication unit 953, a memory 954, an input device 955, a monitor 956, and a speaker 957. Here, the back-end client 95 or the police radio base station apparatus 97 has a function as a transmission unit that transmits a recording start instruction to the wearable camera 10. For example, the police radio base station apparatus 97 functions as a first transmission unit, and the communication unit 953 of the back-end client 95 functions as a second transmission unit.

  The CPU 951 performs, for example, control processing for overall control of operations of each unit of the back-end client 95, data input / output processing with other units, data calculation (calculation) processing, and data storage processing. . The CPU 951 operates according to programs and data stored in the memory 954.

  The back-end client 95 includes a DTMF generation unit 96 as an example of a voice command generation unit that can be realized by executing an application program that runs on the CPU 951. The DTMF generation unit 96 generates a DTMF signal of an audio signal including instruction information such as a recording start instruction command and target device identification information. The DTMF generation unit 96 may be configured by software or hardware in another circuit block in the back-end client 95 or in a device separate from the back-end client 95. The DTMF generator 96 can receive recording start instruction information from a plurality of back-end clients 95 and generate a DTMF signal for recording start instruction. Note that the audio signal for transmitting the recording start instruction by wireless communication is not limited to the DTMF signal, and any other audio signal may be used as long as it can include instruction information such as a recording start instruction. Further, the CPU 951 of the back-end client 95 has an IP command generation unit 959 that can be realized by executing an application program. The IP command generation unit 959 generates an IP command for performing various instructions such as a recording start instruction. Note that the instruction information for transmitting the recording start instruction via the network is not limited to the IP command, and instruction information by other communication codes may be used.

  The I / O control unit 952 performs control related to data input / output between the CPU 951 and each unit of the back-end client 95 (for example, the communication unit 953, the input device 955, and the monitor 956), and the data from the CPU 951 and the CPU 951 Relay data. The I / O control unit 952 may be configured integrally with the CPU 951.

  The communication unit 953 is communicably connected to the network 910. For example, the back-end server 50 performs wired or wireless communication with the back-end streaming server 65, the wearable camera 10, the in-vehicle camera system 30, and the smartphone 40. .

  The memory 954 is configured using, for example, RAM, ROM, nonvolatile or volatile semiconductor memory, functions as a work memory when the CPU 951 operates, and stores a predetermined program and data for operating the CPU 951. .

  The input device 955 is a UI for receiving an input operation of the operator 98 and notifying the CPU 951 via the I / O control unit 952, and is a device having an input function such as a mouse and a keyboard. The input device 955 may be configured using, for example, a touch panel or a touch pad that is arranged corresponding to the screen of the monitor 956 and can be operated with the finger of the operator 98 or the stylus pen.

  The monitor 956 is configured using a display device such as an LCD or an organic EL, and displays various types of information. The monitor 956 displays various types of information according to, for example, notification from the outside, contact from the police officer 3, input operation of the operator 98, and the like. For example, when a recording start instruction is transmitted to the wearable camera 10, the monitor 956 displays related information such as instruction content and instruction target under the control of the CPU 951.

  The speaker 957 outputs the playback sound in the back-end client 95 under the control of the CPU 951 in accordance with the input operation of the operator 98. When transmitting the DTMF signal, the speaker 957 outputs the DTMF signal generated by the DTMF generation unit 96 as a sound.

  The police radio base station apparatus 97 is a radio base station that performs transmission and reception of radio communications by the police radio system, and transmits and receives voices to and from the police radio terminal 35 in the jurisdiction of the police station 4. The police radio base station apparatus 97 includes a microphone 971 and a speaker 972 for calling. When transmitting a recording start instruction using a DTMF signal using police radio, it is also possible to broadcast a recording start instruction to a plurality of wearable cameras 10.

  FIG. 7 is a diagram illustrating an example of a DTMF signal used in the present embodiment, (A) is a diagram illustrating an example of a signal format, and (B) is a diagram illustrating a specific example of a value of each signal block. In the present embodiment, a recording start instruction based on an audio signal can be transmitted to the wearable camera 10 using a DTMF signal obtained by combining audio signals having two different frequencies. The DTMF signal is an analog audio signal capable of transmitting information by an audio signal having a predetermined frequency. As shown in FIG. 7A, the signal format of the DTMF signal includes a recording start command indicating an instruction to start recording twice, a target BWC number indicating a target wearable camera twice, a command, target device information, and the like. Shall be repeated twice each. In order to reduce reception errors in the wearable camera 10, the recording start instruction by the DTMF signal transmits the same information twice.

  As shown in FIG. 7B, the value of the DTMF signal includes the recording start command value “AABBCC991111” and the individual target BWC number value “BBCC * 123456” (in this case, the wearable camera whose device number is 123456). ), And the value of the target BWC number for all devices is “BBCC * 000000”. When all wearable cameras are targeted, only the recording start command is broadcast to each wearable camera so that the target BWC number is not transmitted, and all wearable cameras that have received the recording start command start the recording operation. You may do it. In this case, for example, only when the recording start command is received due to deterioration of the communication quality of the transmission path and the target BWC number is not normally received or when the target BWC number cannot be received due to a reception error. The wearable camera starts recording.

  Below, operation | movement of the wearable camera system 5 which has the said structure is demonstrated. In the present embodiment, when recording video data captured by the wearable camera 10, not only the operation of the police officer 3 wearing the wearable camera 10, but also an instruction to start recording by an IP command or DTMF signal from the command system 90 or the like Based on the above, the recording operation can be started by an external instruction or a remote instruction. For example, assuming that the police officer 3 cannot press the recording switch SW1 of the wearable camera 10 due to reasons such as being in a hurry or not being able to release the hand when an incident occurs, recording by IP command or DTMF signal is assumed. Recording starts according to the start instruction.

(Operation of the first embodiment)
FIG. 8 is a sequence diagram illustrating an example of a recording start procedure in the wearable camera system 5 according to the first embodiment. In the first embodiment, the instruction system 90 transmits a recording start instruction by a DTMF signal to the wearable camera 10 using police radio, and an ACK (Acknowledgement) message from the wearable camera 10 is transmitted via the network 67 to the back-end client. An example of operation received at 95 is shown.

  The operator 98 in the command room determines that the recording start operation of the wearable camera 10 is necessary based on the occurrence status of the incident, the communication status of the police radio, etc., and uses the back-end client 95 of the command system 90 to instruct the recording start Perform the input operation. When receiving the recording start instruction (T11), the back-end client 95 outputs a DTMF transmission request to the DTMF generation unit 96 (T12). When receiving the DTMF transmission request, the DTMF generation unit 96 returns an ACK signal (T13) and generates a DTMF signal including a recording start instruction command (T14). The DTMF generation unit 96 transmits the generated DTMF signal to the back-end client 95 and the police radio base station apparatus 97 (T15, T16). The back-end client 95 reproduces and outputs the DTMF signal from the speaker 957 (T17). The operator 98 in the command room can monitor and confirm the sound of the DTMF signal for instructing recording start by listening to the reproduced sound of the DTMF signal.

  The police radio base station apparatus 97 inputs the voice of the DTMF signal reproduced by the back-end client 95 by the microphone 971 or inputs the DTMF signal from the DTMF generation unit 96 and uses the DTMF signal as a radio signal of the police radio. And is transmitted to the police radio terminal 35 (T18). The police officer 3 dispatched to the scene of the incident wears or possesses the wearable camera 10 and the police radio terminal 35. The police radio terminal 35 receives a radio signal from the police radio base station device 97 and reproduces and outputs a DTMF signal.

  Wearable camera 10 in the vicinity of police radio terminal 35 inputs a DTMF signal including a recording start instruction command through microphone 29A (T19). The wearable camera 10 can always wait for input of a DTMF signal from the microphone 29A. When the wearable camera 10 receives a recording start instruction by the DTMF signal, the wearable camera 10 determines the start of the recording operation, and starts the operation of recording the video data captured by the imaging unit 11 in the storage unit 15 (T20). Further, the wearable camera 10 transmits an ACK transmission request to the smartphone 40 by wireless communication such as BLE in response to the recording start instruction by the DTMF signal (T21). Upon receiving the ACK transmission request from the wearable camera 10, the smartphone 40 transmits an ACK message to the back-end server 50 via the mobile communication network 67 such as LTE (Long Term Evolution) (T22). Note that the communication between the wearable camera 10 and the smartphone 40 and the communication between the smartphone 40 and the back-end server 50 are not limited to BLE and LTE, and other communication means such as a wireless LAN may be used.

  The backend server 50 transmits the received ACK message to the backend client 95 (T23). When the back-end client 95 receives the ACK message in response to the DTMF transmission request for the recording start instruction, the back-end client 95 recognizes that the recording start instruction by the DTMF signal has been normally received by the wearable camera 10, and the recording operation is started. A recording start message indicating this is displayed on the monitor 956 (T24). The operator 98 in the command room can confirm the recording start of the wearable camera 10 by viewing the recording start message displayed on the monitor 956 of the back-end client 95.

(Operation of Second Embodiment)
FIG. 9 is a sequence diagram illustrating an example of a recording start procedure in the wearable camera system 5 according to the second embodiment. In the second embodiment, the command system 90 transmits a recording start instruction by an IP command to the wearable camera 10 via the network 67, and an ACK message from the wearable camera 10 is transmitted to the back-end client 95 via the network 67. FIG.

  The operator 98 in the command room determines that the recording start operation of the wearable camera 10 is necessary based on the occurrence status of the incident, the communication status of the police radio, etc., and uses the back-end client 95 of the command system 90 to instruct the recording start Perform the input operation. When receiving the recording start instruction (T31), the back-end client 95 generates a recording start command based on the IP command and transmits it to the back-end server 50 (T32). The operator 98 in the command room can confirm the transmission of the recording start instruction to the wearable camera 10 by viewing the recording start instruction transmission message displayed on the monitor 956 of the back-end client 95.

  The back-end server 50 transmits the recording start command received from the back-end client 95 to the smartphone 40 via the network 67 (T33). The smartphone 40 transmits the received recording start command to the wearable camera 10 by wireless communication such as BLE (T34).

  Wearable camera 10, upon receiving the recording start instruction by the recording start command of the IP command, determines the start of the recording operation, and starts the operation of recording the video data captured by imaging unit 11 in storage unit 15 (T35). . Further, the wearable camera 10 transmits an ACK message to the smartphone 40 by wireless communication such as BLE in response to the recording start instruction by the recording start command (T36). The smartphone 40 transmits the ACK message received from the wearable camera 10 to the back-end server 50 via the mobile communication network 67 such as LTE (T37). Note that the communication between the wearable camera 10 and the smartphone 40 and the communication between the smartphone 40 and the back-end server 50 are not limited to BLE and LTE, and other communication means such as a wireless LAN may be used.

  The backend server 50 transmits the received ACK message to the backend client 95 (T38). When the back-end client 95 receives the ACK message for the recording start command for the recording start instruction, the back-end client 95 recognizes that the recording start instruction by the recording start command has been normally received by the wearable camera 10 and starts the recording operation. A recording start message indicating this is displayed on the monitor 956 (T39). The operator 98 in the command room can confirm the recording start of the wearable camera 10 by viewing the recording start message displayed on the monitor 956 of the back-end client 95.

(Configuration and operation of the third embodiment)
FIG. 10 is a block diagram showing an example of the configuration of the wearable camera 10A and police radio terminal 35 of the third embodiment, and FIG. 11 is a sequence showing an example of a recording start procedure in the wearable camera system 5 of the third embodiment. FIG. In the third embodiment, the command system 90 transmits a recording start instruction using a DTMF signal to the wearable camera 10A using the police radio, and transmits an ACK message from the wearable camera 10A as an ACK signal using the police radio using the DTMF signal. An example of operation received by the back-end client 95 will be described.

  The wearable camera 10 </ b> A includes a camera body 120 and a microphone switch unit 130. The camera body 120 has the same configuration as the wearable camera 10 shown in FIG. 4 and includes a camera unit 121 including the imaging unit 11 and an MCU 122. The microphone switch unit 130 includes a PTT (Push to Talk) switch 131, a PTT switch information output unit 132, an audio signal processing unit 134, a microphone 133, and a DTMF generation unit 135. The microphone switch unit 130 is connected to the police radio terminal 35 and performs switch operations of the police radio terminal 35 and the wearable camera 10 </ b> A, and collects voice and various voices. The microphone switch unit 130 is configured integrally or separately from the camera body 120, and is mounted or arranged so that the police officer 3 can easily perform the switch operation and microphone sound collection. In this case, the microphone switch unit 130 also serves as the sound collection unit of the wearable camera 10A and the police radio terminal 35, and may be configured by a pin microphone, a headset, or the like.

  The PTT switch 131 is a switch for performing so-called push-to-talk, and is a switch for transmitting a call to the police radio terminal 35 when the switch is pressed. The PTT switch information output unit 132 outputs operation information indicating that the PTT switch 131 has been pressed to the police radio terminal 35 and the MCU 122 of the wearable camera 10A. The PTT switch information output unit 132 outputs PTT switch operation information when an ACK signal is transmitted as a DTMF signal in addition to when the PTT switch 131 is pressed. The microphone 133 functions as a sound collection unit of the wearable camera 10 </ b> A and the police radio terminal 35, collects surrounding sounds, and outputs a sound signal. The DTMF generation unit 135 generates a DTMF signal of an audio signal including ACK information. The audio signal processing unit 134 processes the ACK signal based on the audio signal collected by the microphone 133 or the DTMF signal generated by the DTMF generation unit 135 and outputs the ACK signal to the police radio terminal 35 and the MCU 122 of the wearable camera 10A. The DTMF generator 135 may be provided in the camera body 120.

  As shown in FIG. 11, the operator 98 in the command room determines that the recording start operation of the wearable camera 10 is necessary based on the occurrence status of the incident, the communication status of the police radio, and the like. 95 is used to input a recording start instruction. When the back-end client 95 receives an input of a recording start instruction (T51), it outputs a DTMF transmission request to the DTMF generation unit 96 (T52). When the DTMF generation unit 96 receives the DTMF transmission request, it returns an ACK signal (T53) and generates a DTMF signal including a recording start instruction command (T54). The DTMF generation unit 96 transmits the generated DTMF signal to the back-end client 95 and the police radio base station apparatus 97 (T55, T56). The back-end client 95 reproduces and outputs the DTMF signal from the speaker 957 (T57). The operator 98 in the command room can monitor and confirm the sound of the DTMF signal for instructing recording start by listening to the reproduced sound of the DTMF signal.

  The police radio base station apparatus 97 inputs the voice of the DTMF signal reproduced by the back-end client 95 by the microphone 971 or inputs the DTMF signal from the DTMF generation unit 96 and uses the DTMF signal as a radio signal of the police radio. And is transmitted to the police radio terminal 35 (T58). The police officer 3 dispatched to the scene of the incident wears or possesses the wearable camera 10 and the police radio terminal 35. The police radio terminal 35 receives a radio signal from the police radio base station device 97 and reproduces and outputs a DTMF signal.

  Wearable camera 10A in the vicinity of police radio terminal 35 inputs a DTMF signal including a recording start instruction command through microphone 133 (T59). Wearable camera 10A receives the recording start instruction by the DTMF signal, determines the start of the recording operation, and starts the operation of recording the video data captured by camera unit 121 (T60). In response to the recording start instruction by the DTMF signal, the wearable camera 10A generates a DTMF signal including ACK information by the DTMF generation unit 135, and outputs an ACK signal of the DTMF signal to the police radio terminal 35 (T61).

  The police radio terminal 35 receives the DTMF signal ACK signal from the DTMF generator 135, converts the DTMF signal into a police radio radio signal, and transmits it to the police radio base station apparatus 97 (T62). The police radio base station apparatus 97 receives the radio signal from the police radio terminal 35, and reproduces and outputs the ACK signal of the DTMF signal (T63). Note that the ACK signal transmitted by the police radio may use another identifiable voice signal such as a predetermined voice or a beep instead of the DTMF signal. The operator 98 in the command room recognizes that the recording start instruction by the DTMF signal is normally received by the wearable camera 10A by listening to the reproduction sound of the ACK signal of the DTMF signal, and wearable. The start of recording by the camera 10A can be confirmed.

  FIG. 12 is a flowchart showing an example of a recording process in the wearable camera 10 of the present embodiment. FIG. 12 shows a process that can handle both the recording start process by the DTMF signal shown in FIG. 8 or FIG. 11 and the recording start process by the IP command shown in FIG.

  Wearable camera 10 determines whether a recording start instruction by a DTMF signal has been received (S11), a recording start instruction by an IP command (S12), or a recording start button has been pressed (S13). Each determination is made, and it waits until any recording start instruction is received. When receiving a recording start instruction by a DTMF signal or a recording start instruction by an IP command, or when a recording start button is pressed, the wearable camera 10 starts a recording operation and stores a video data imaged by the imaging unit 11. Recording to 15 is started (S14). The wearable camera 10 has received a recording stop instruction by the DTMF signal (S15), has received a recording stop instruction by the IP command (S16), has pressed the recording stop button (S17), and is set to a predetermined time. It is determined whether the timer has expired (S18), and the recording operation is continued until reception of any recording stop instruction or the timer expires. When the recording stop instruction by the DTMF signal or the recording stop instruction by the IP command is received, or when the recording stop button is pressed or the timer expires, the wearable camera 10 stops the recording operation and the video data captured by the imaging unit 11 Is recorded in the storage unit 15 (S19).

  FIG. 13 is a flowchart illustrating an example of a recording process in the back-end client 70 of the present embodiment. FIG. 13 shows a process that can handle both the recording start process by the IP command shown in FIG. 9 and the recording start process by the DTMF signal shown in FIG.

  The back-end client 70 determines whether or not a recording start operation has been input from the operator 98 in the command room, and waits for an input of the recording start operation (S21). When a recording start operation is performed, the back-end client 70 executes a recording start process using an IP command (S22). In the recording start process by the IP command, a recording start instruction (recording start command) by the IP command shown in FIG. 9 is transmitted to the wearable camera 10. At this time, the back-end client 70 sets a timer for a predetermined time as a time to wait for a recording start instruction receipt response (ACK message) from the wearable camera 10 (S23), and displays “response” as an operation status display on the monitor 956. A “waiting” message is displayed (S24). Then, the back-end client 70 determines whether or not the ACK message from the wearable camera 10 has been received (S25). If the ACK message is received, the recording start instruction by the IP command is normally received by the wearable camera 10. Then, a message “confirm recording start” is displayed on the monitor 956 as an operation status display (S26).

  When the back-end client 70 does not receive the ACK message from the wearable camera 10 in step S25, the back-end client 70 determines whether the timer set in step S23 has expired (the counting of the predetermined time has ended) (S27). Wait until it expires. When the timer for a predetermined time has expired, the back-end client 70 executes a recording start process using a DTMF signal (S28). In the recording start process using the DTMF signal, a recording start instruction using the DTMF signal shown in FIG. 8 is transmitted to the wearable camera 10. At this time, the back-end client 70 displays a message “Recording request transmission by DTMF” on the monitor 956 as an operation state display (S29). Then, the back-end client 70 determines whether or not the ACK message from the wearable camera 10 has been received (S30). When the back-end client 70 receives the ACK message, the recording start instruction by the DTMF signal is normally received by the wearable camera 10. Then, a message “confirm recording start” is displayed on the monitor 956 as an operation state display (S31). As shown in FIG. 11, when receiving an ACK signal by a DTMF signal in response to a recording start instruction, the operator 98 can confirm the reception of the ACK signal by the police radio base station apparatus 97, so steps S30 and S31. The procedure of is omitted.

  As described above, in the present embodiment, the video recording operation performed by the wearable camera in response to the recording start instruction using the DTMF signal or the recording start instruction using the IP command without the police officer actively performing the recording operation. Can be started. For this reason, even when recording is suddenly necessary, such as when an incident occurs, recording omissions can be reduced and work can be efficiently supported.

  In the wearable camera system of this embodiment, a wearable camera 10 that can be worn or possessed by a user such as a police officer, and a back-end client 95 of the command system 90 that can be connected to the wearable camera 10 via a communication path. Including the headquarters device. The wearable camera 10 communicates with an image capturing unit 11 that captures an image of a subject, a storage unit 15 that records an image of the imaged subject, and a headquarter device as a receiving unit that receives an instruction from the headquarter device. The communication unit 21 includes a microphone 29A that collects an audio signal. The headquarter device includes a voice command generation unit that generates instruction information using an audio signal, a first transmission unit that transmits a first recording start instruction using an audio signal, and a second that transmits a second recording start instruction using a communication code. A transmission unit. For example, the voice command generation unit includes a DTMF generation unit 96 that generates a DTMF signal capable of transmitting information using a voice signal having a predetermined frequency. For example, the first transmission unit includes a police radio base station apparatus 97 that transmits a voice signal such as a call voice using a radio channel of a police radio as a transmitter for transmitting a first recording start instruction using a DTMF signal. . For example, the second transmission unit includes a communication unit 953 of the back-end client 95 for transmitting a second recording start instruction based on an IP command. The headquarter device transmits at least one of the first recording start instruction and the second recording start instruction to the wearable camera 10. When the wearable camera 10 receives the first recording start instruction or the second recording start instruction transmitted from the headquarter device, the wearable camera 10 starts recording the video of the subject imaged by the imaging unit 11 and stores it in the storage unit 15. Record video data.

  Thereby, wearable camera 10 starts recording the video of the subject by receiving either the first recording start instruction by the audio signal or the second recording start instruction by the communication code transmitted from the headquarter device. it can. For this reason, a user such as a police officer can start the recording operation of the wearable camera in response to a recording start instruction from the headquarter device without performing a recording operation independently.

  In the wearable camera system, the wearable camera 10 receives only the first recording start instruction, receives only the second recording start instruction, and receives the first recording start instruction and the second recording. When both the start instruction can be received and recording is started by the recording start instruction of the earlier received one, when either the first recording start instruction or the second recording start instruction is not received, Various forms are envisaged, such as when recording is started by receiving another recording start instruction.

  Further, in the wearable camera system of the present embodiment, for example, a police radio terminal 35 is provided as a radio communication terminal that can be worn or possessed by a user such as a police officer and can make a voice call. As a wireless communication device that performs wireless communication, for example, a police wireless base station device 97 is provided, and the wireless communication device transmits a first recording start instruction to the wireless communication terminal. The wearable camera 10 includes, for example, a microphone 29A as a sound collection unit that collects the reception sound of the wireless communication terminal. When the first recording start instruction is received by the sound collection unit, the wearable camera 10 is imaged by the imaging unit 11. Start recording the video of the subject.

  Thereby, the headquarters apparatus including the back-end client 95 of the command system 90 transmits the first recording start instruction by voice signal to the wireless communication terminal worn or possessed by the user using wireless communication such as police radio. The wearable camera 10 can start recording the video of the subject by receiving the first recording start instruction transmitted to the wireless communication terminal by the sound collection unit. As described above, it is possible to transmit the first recording start instruction and instruct the wearable camera 10 to start recording by using an existing wireless communication system installed in advance such as police radio. At the police station, a police radio system is installed to transmit the command to each police officer. Since the police officer carries the police radio terminal 35, the first recording by voice signal is started by using the police radio. An instruction can be transmitted.

  Further, in the wearable camera system of the present embodiment, the headquarter device transmits a second recording start instruction to the wearable camera 10, and when a response from the wearable camera 10 to the second recording start instruction cannot be received, A first recording start instruction is transmitted. For example, when the second recording start instruction by the IP command is transmitted and there is no response from the wearable camera 10, the first recording start instruction by an audio signal such as a DTMF signal is used by using wireless communication such as police radio. By transmitting, the recording start instruction can be transmitted to the wearable camera 10 more reliably and the recording operation can be started.

  Further, in the wearable camera system of the present embodiment, the headquarter device transmits the first recording start instruction to the plurality of wearable cameras 10 when transmitting the first recording start instruction. Thereby, it is possible to instruct the plurality of wearable cameras 10 to start recording all at once. At this time, for example, the first recording start instruction can be easily broadcasted using an audio signal such as a DTMF signal using radio communication such as police radio.

  In the recording control method in the wearable camera system according to the present embodiment, the headquarter device generates instruction information based on an audio signal, and includes a first recording start instruction based on the audio signal and a second recording start instruction based on the communication code. At least one of the recording start instructions is transmitted to the wearable camera, and the wearable camera 10 captures the subject and receives the first recording start instruction or the second recording start instruction transmitted from the headquarter device. In this case, the recording of the imaged subject image is started.

  As a result, a user such as a police officer can start the recording operation of the wearable camera in response to a recording start instruction from the headquarter device without performing a recording operation independently.

  In the above-described embodiment, a configuration example of a wearable camera system used by a police station and a police officer as a user is shown. However, this embodiment is a wearable camera system used in other organizations such as a security company and a security guard. It is also applicable.

  In the case of the third embodiment shown in FIG. 10 and FIG. 11, a configuration for transmitting a second recording start instruction by an IP command or the like (network 67, smartphone 40, wireless LAN access point 45, back-end server 50). Etc.) is not necessarily required, and any configuration may be used as long as the police radio base station device 97 and the police radio terminal 35 can transmit the first recording start instruction by the DTMF signal or the like.

  While various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood. In addition, the constituent elements in the above embodiment may be arbitrarily combined without departing from the spirit of the invention.

  The present invention provides a wearable camera system and a recording control for efficiently supporting a business by starting recording of a video imaged by a wearable camera without reducing a recording omission, without requiring a user to perform a recording operation. Useful as a method.

3 Police officer 4 Police station 5 Wearable camera system 8 In-station system 10, 10A Wearable camera (BWC)
10z housing 11 imaging unit 11z imaging lens 12 GPIO
13 RAM
14 ROM
15 storage unit 16 EEPROM
17 RTC
18 GPS receiver 19 MCU
21 Communication Unit 22 USB Interface 23 Contact Terminal 24 Power Supply Unit 25 Battery 26a, 26b, 26c LED
27 Vibrator 28 LCD
29A Microphone 29B Speaker 29C Earphone terminal 30 In-vehicle camera system 31 In-vehicle camera 32 In-vehicle PC
33 In-vehicle recorder 35 Police radio terminal 40 Smartphone 45, 63 Wireless LAN access point 50 Back-end server (BES)
65 Back-end streaming server (BSS)
67,910 Network 68 Collective charging stand 70,95 Backend client (BEC)
90 Command system 96, 135 DTMF generator 97 Police radio base station device 98 Operator 951 CPU
952 I / O control unit 953 Communication unit 954 Memory 955 Input device 956 Monitor 957, 972 Speaker 971 Microphone 120 Camera body 121 Camera unit 122 MCU
130 Microphone switch part 131 PTT switch 132 PTT switch information output part 133 Microphone SW1 Recording switch SW2 Snapshot switch SW3 Communication mode switch SW4 Attribute information addition switch

Claims (5)

A wearable camera system comprising a wearable camera that can be worn or possessed by a user, and a headquarter device that can be connected to the wearable camera via a communication path,
The wearable camera is
An imaging unit for imaging a subject;
A recording unit that records the captured video of the subject;
A receiving unit that receives an instruction from the headquarter device,
The headquarters device
A voice command generator for generating instruction information by a voice signal;
A first transmission unit for transmitting a first recording start instruction by the audio signal;
A second transmission unit for transmitting a second recording start instruction by a communication code,
Sending at least one of the first recording start instruction and the second recording start instruction to the wearable camera;
The wearable camera is
When the first recording start instruction or the second recording start instruction transmitted from the headquarter device is received, the recording of the video of the subject imaged by the imaging unit is started.
Wearable camera system. The wearable camera system according to claim 1,
Provided with a wireless communication terminal that can be worn or possessed by the user and capable of voice communication;
The headquarters device
The first transmission unit includes a wireless communication device that performs wireless communication with the wireless communication terminal,
Transmitting the first recording start instruction to the wireless communication terminal by the wireless communication device;
The wearable camera is
As the receiving unit, a sound collecting unit for collecting the received voice of the wireless communication terminal,
When receiving the first recording start instruction by the sound collection unit, start recording the video of the subject imaged by the imaging unit;
Wearable camera system. The wearable camera system according to claim 1,
The headquarters device
Transmitting the second recording start instruction to the wearable camera, and transmitting the first recording start instruction when a response from the wearable camera to the second recording start instruction cannot be received;
Wearable camera system. The wearable camera system according to claim 1,
The headquarters device
When transmitting the first recording start instruction, the first recording start instruction is broadcast to a plurality of the wearable cameras.
Wearable camera system. A wearable camera system comprising: a wearable camera that can be worn or possessed by a user; and a headquarter device that can be connected to the wearable camera via a communication path.
The headquarters device
Generate instruction information by voice signal,
Transmitting at least one recording start instruction of the first recording start instruction by the audio signal and the second recording start instruction by the communication code to the wearable camera;
The wearable camera is
Image the subject,
When the first recording start instruction or the second recording start instruction transmitted from the headquarter apparatus is received, recording of the captured video of the subject is started.
Recording control method.

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