JP2017060017A - Imaging apparatus and imaging system - Google Patents

Abstract

An object of the present invention is to automatically and periodically adjust the time of a monitoring system to a correct time.
SOLUTION: A sound processing unit for managing a time to be added to a recorded video and a microphone capable of receiving a time signal emitted from a radio timepiece, and for determining whether a sound received by the microphone is registered sound data And a determination processing unit. When the received sound is registered sound data, the image processing apparatus includes an imaging device that adjusts the time managed by the time processing unit to the time when the registered sound data is emitted.
[Selection] Figure 1

Description

  The present invention relates to an imaging apparatus and an imaging system.

  In the surveillance field, the accuracy of the time recorded in the video is required. In a monitoring system using an IP network, an IP camera, a DVR (Digital Video Recorder), or the like is used for video recording, and the time of the internal clock is used for the time of the recorded video. The internal clock uses an RTC (RealTimeClock) device or a commercial power supply frequency to create the time. However, there is an error, so if it is operated for a long time, the deviation from the correct time becomes large. For this reason, it is necessary to set the time periodically.

  The time adjustment method is set manually or automatically. Manual setting is possible at the initial startup of the apparatus or when the number of devices is small, but the work becomes complicated when a large number of IP cameras are used. Therefore, it is conceivable to synchronize with the signal from the master device, or to acquire the time from the network and automatically acquire it.

  Patent Document 1 discloses a timepiece that automatically adjusts the time based on a time signal sound. “A standard time signal sound and an electric signal related to a sound that informs the time are input by the input means 11, and a voice recognition device is obtained from the electric signal. 12 is input to the time adjustment control device 13. As a result, the time adjustment control device 13 corrects the time of the clock main body 14 to the time of the sound that informs the time at the timing of the standard time signal sound. . "

JP-A-5-45478

In Patent Document 1, the user of the wristwatch 40 dials the telephone number of Nippon Telegraph and Telephone Corporation's time signal service service, and then places the window glass 41 provided on the wristwatch 40 in front of the telephone receiver or speaker. Therefore, it is necessary for the user to manually connect to the central office, and in order to acquire telephone voice, it is necessary to design a receiver and install it near the telephone. It is necessary to perform an action.
An object of the present invention is to automatically and regularly adjust the time of the monitoring system to the correct time.

In order to solve the above problems, in the present invention, for example, a time processing unit that manages the time to be added to a recorded video and a microphone that can receive a time signal emitted from a radio clock are equipped, and sound received by the microphone is received. A sound determination processing unit for determining whether the sound is registered sound data, and when the received sound is registered sound data, the time managed by the time processing unit is adjusted to the time when the registered sound data is emitted. It has an imaging device.

  According to the present invention, it is possible to automatically and regularly adjust the time of the monitoring system to the correct time.

It is a figure explaining the structure of the monitoring system of this invention. This is a setting item of the radio clock 100. This is a setting item for the master IP camera. 2 is a block diagram of an IP camera 101. FIG. The flowchart of the time adjustment process of an IP camera is shown.

  Hereinafter, examples will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating the configuration of the monitoring system of the present invention.

  This monitoring system includes a plurality of IP cameras 101 and 102, a radio timepiece 100 provided in an area where the IP cameras are provided, and a monitoring device 103 for the IP cameras 101 and 102. The IP cameras 101 and 102 and the monitoring device 103 are connected via an HUB 104 via an IP network. The number of IP cameras may be one or more, and the number is not limited. The radio timepiece 100 is the same as a normal radio timepiece, and is used near a window where the radio wave from the transmitting station 105 is easily received.

  Next, each device constituting the monitoring system will be described.

  The radio clock 100 receives time information transmitted from the standard radio wave transmission station 105 and corrects its own clock to the time received from the transmission station 105. The frequency of reception is arbitrary but about once a day. If the reception is successful, the clock can be operated by determining that its own clock time is correct for 24 hours until the next reception.

  FIG. 2 shows setting items of the radio timepiece 100.

  The setting items of the radio timepiece 100 are adjustment time, time signal adjustment, and time signal.

  The adjustment time is a time at which the time of the radio timepiece 100 is desired to be adjusted. When the radio timepiece 100 can receive time information from the transmitting station 105, an alarm sound 1 is generated. In the example of FIG. 2, the setting is “ON”, the setting time is “1: 0”, and the time of the radio timepiece 100 is set to 1: 0.

  The time signal adjustment is a setting for generating the alarm sound 2 as a time signal sound when it is determined that the timepiece 100 is at the correct time, that is, when time information is received from the transmitting station 105 and its own time is corrected. As a result, when the reception is successful at the adjustment time, a time signal sound other than “10:00” is generated as an alarm sound 2 for 24 hours. When using this setting, turn on the time signal adjustment on the camera side.

  For the time signal, set the normal time signal ON / OFF. In this way, by adjusting the timing of time adjustment with the time signal, it is possible to adjust the time without giving a sense of incongruity to the people around the radio timepiece 100 and the IP cameras 101 and 102.

  If the time cannot be received from the transmitting station, its own time is not set, and all time signal sounds are generated by the alarm sound 3.

  There are two types of IP cameras: a master IP camera and a slave IP camera. The master IP camera is an IP camera that receives alarm sounds. One camera is set in the normal monitoring system, and the other IP cameras are slaves. Get the time of the IP camera and set the time. In FIG. 1, the IP camera 101 is a master IP camera, and the IP camera 102 is a slave IP camera.

  An IP camera 101 that is a master IP camera uses an IP camera with a microphone that can receive the alarm sound of the radio timepiece 100. Two types of sound information can be registered in the IP camera, and sound information of alarm sound 1 (adjustment time sound) and alarm sound 2 (time signal adjustment sound) can be registered. Further, it is assumed that the alarm sound 1, the alarm sound 2, and other sounds can be discriminated by confirming the frequency or the like of the alarm sound with the sound determination circuit.

  FIG. 3 shows setting items of the master IP camera.

  The setting items of the master IP camera include adjustment time, adjustment time, and time signal adjustment.

  The adjustment time is a time for adjusting the time of the IP camera based on the radio clock 100. In the example of FIG. 3, the setting is “ON” and the setting time is “10:00”.

  The adjustment time is a period in which an alarm sound is determined for time adjustment, and is a time in a range including the adjustment time. In the example of FIG. 3, the time zone from 0:30 to 1:30 is set. When the alarm sound 1 is determined during the adjustment time, the time is adjusted to the adjustment time. Normally, the same time is set for the radio timepiece 100 and the IP camera 101 as the adjustment time.

  Time signal adjustment can also be set. In the example of FIG. 3, the setting is set to “ON”, and for example, it is possible to detect the time signal only for several minutes before and after every hour such as 0:00, 1:00, 2:00,. Used to fine tune the progression of When using the time signal adjustment, the time signal adjustment is turned on in the radio timepiece 100 so that it can be determined whether or not the time of the time signal 100 is correct using the time signal sound.

  Returning to FIG. 1, the monitoring apparatus 103 records the video signal supplied from the IP camera as a digital data in a built-in or external recording apparatus. You can also check various statuses such as IP camera images and alarms.

  FIG. 4 is a block diagram of the IP camera 101.

  The IP camera 101 is connected to the monitoring device 103 via a network.

  The IP camera 101 includes an imaging unit 401 that performs imaging, a microphone input unit 402, a memory management unit 403, a time processing unit 404, a network communication unit 405, and a control unit 410 that controls them.

  The memory management unit 403 stores later-described comparison sound data as sound data information.

  The control unit 410 controls the entire IP camera 101, and includes an image / audio processing unit 412, a camera control unit 411, a data transmission / reception processing unit 413, and a sound determination processing unit 414. The imaging unit 401 includes a lens or the like and captures an image of a monitoring location.

  The camera control unit 411 determines brightness and the like from the image obtained by the imaging unit 401, and adjusts the iris and shutter speed manually or automatically if necessary to adjust the image to be suitable for monitoring. To do.

  The video obtained by the imaging unit 401 is encoded by the image / sound processing unit 412 and converted into digital data. The converted image / audio data is converted into IP data by the data transmission / reception processing unit 413 so that it can be transmitted to the designated IP address on the network, sent to the network communication unit 405, and transmitted to the outside.

  The sound received by the microphone input unit 402 is encoded by the image / sound processing unit 412 and transmitted to the sound determination processing unit 414 to be compared with the alarm sound data information registered in the memory management unit 403. . Note that the sound determination processing unit 414 can increase the determination accuracy by performing comparison by amplifying the frequency component corresponding to the registered sound data and making it stronger against noise.

  As a result of the comparison, if it is the adjusted time sound, the time managed by the time processing unit 404 is changed to the adjusted time.

  FIG. 5 shows a flowchart of time adjustment processing of the IP camera.

  First, the sound determination processing unit 414 checks whether the current time is the adjustment time set by the IP camera 101 (S501).

  If it is determined in S501 that it is not the adjustment time (NO in S501), it is determined whether it is the adjusted time signal time (S502). When the time signal time after adjustment has not been issued (NO in S502), it is confirmed whether or not the time has been adjusted for a long time (S503). If the time has not been adjusted for a long time (YES in S503), if there is no alarm sound from the radio clock for the specified number of days even though the adjustment time is ON, it is determined that the system has malfunctioned. In the abnormality notification process, an abnormality notification is sent to the monitoring device 103 (S504).

  Returning to S502, if it is determined that the adjusted time signal time is reached (YES in S502), the sound determination processing unit 414 checks whether the audio data captured by the microphone input unit 402 matches the alarm sound 2. (S507). If it is different from the registered alarm sound (NO in S507), return to the loop again. If it matches the registered alarm sound (YES in S507), a time signal adjustment process is performed (S508). In the time signal adjustment processing (S508), the time signal sound at regular intervals (usually 1 hour) is compared with the time inside the IP camera. If the time inside the IP camera is ahead of the time signal sound, Adjustment is performed by the time processing unit 404 so that the advance of the clock is delayed. In this case, it adjusts so that it may become slow gradually instead of slowing at once. On the contrary, when it is late compared with the time signal sound, it is not necessary to adjust in particular. This is because when the time advances, the same time occurs in the recorded image to return the time, so it is necessary to perform processing to prevent the recording times from overlapping so that time inconsistencies do not occur. The same time does not occur.

  Returning to S501, if the adjustment time is determined in S501 (YES in S501), the sound determination processing unit 414 checks whether the audio data captured by the microphone input unit 402 matches the alarm sound 1 (S505). If it differs from the registered sound data, the process returns to the loop again (NO in S505), and if it matches the registered data (YES in S505), time adjustment processing is performed (S506). In the time adjustment process, the own clock is changed to the time set by the adjustment time. However, the time is set in consideration of the time until the determination.

  If the time adjustment process (S506) has not been performed for a predetermined time, it is considered that there is an abnormality in the time of the radio clock or the IP camera, and the abnormality is notified to the monitoring device 103. Receiving the abnormality notification, the monitoring apparatus 103 displays that fact on a monitor screen or the like.

  In the embodiment, the time of the master IP camera is set and the time is set as the time of the monitoring system. However, the time acquired by the master IP camera is transferred to the monitoring device 103, and the time of the monitoring device 103 is set as the master. It is also possible to operate such that another IP camera acquires the time from there.

  In addition, although the time is adjusted with the IP camera, a system may be used in which the time is adjusted by connecting a microphone to the monitoring device. Moreover, you may use the sound of the frequency outside the audible area which a person can hear as an alarm sound.

  If there is a sound source that accurately generates sound at the time setting time and a monitoring IP camera that can receive the sound, it is possible to obtain the correct time without accessing an external network such as the Internet. It is also possible to adjust the time advance by periodically receiving a time signal sound. Furthermore, since the sound source and the monitoring system do not require a wired connection, there is a degree of freedom in installation. In addition, by synchronizing the timing and adjustment timing with the time signal sound, even if a person who does not know this system hears this alarm sound, it will not give any recognition other than the time signal sound, so the unknown alarm sound It can be used as a normal watch without giving any anxiety.

100 Radio Clock 101 Master IP Camera 102 Slave IP Camera 103 Monitoring Device 104 HUB
401 Image pickup unit 402 Microphone input unit 403 Memory management unit 404 Time processing unit 405 Network communication unit 410 Control unit 411 Camera control unit 412 Image / audio processing unit 413 Data transmission / reception processing unit 414 Sound determination processing unit

Claims (8)

A time processing unit for managing the time given to the recorded video;
Equipped with a microphone capable of receiving a time signal emitted from a radio-controlled timepiece, and having a sound determination processing unit for determining whether the sound received by the microphone is registered sound data,
When the received sound is the registered sound data, an imaging apparatus that adjusts the time managed by the time processing unit to the time when the registered sound data is emitted.   The imaging apparatus according to claim 1, wherein the registered sound data is a time signal at an arbitrary time.   The imaging apparatus according to claim 2, wherein the equal recording data is different from the sound data of the time signal at the arbitrary time.   When adjusting the time in the time processing unit, if the time managed by the time processing unit is ahead of the time when the time signal is issued, the advance of the time managed by the time processing unit The imaging apparatus according to claim 1, wherein the adjustment is performed so that the delay time becomes slower.   When the time is adjusted in the time processing unit, if the time managed by the time processing unit is later than the time when the time signal is issued, the time managed by the time processing unit is advanced. The imaging apparatus according to claim 1, wherein the adjustment is not performed.   The imaging device according to claim 1, wherein when the time adjustment is not performed for a predetermined time in the time processing unit, the monitoring device is notified that the radio timepiece or the imaging device has an abnormality.   The image pickup apparatus transmits the adjusted time to another image pickup apparatus connected to the image pickup apparatus via a network when the time processing unit adjusts the time. The imaging device described. A radio clock that emits a time signal,
A time processing unit for managing the time to be added to the recorded video, and a sound determination processing unit equipped with a microphone capable of receiving a time signal emitted from a radio clock, and determining whether the sound received by the microphone is registered sound data And when the received sound is the registered sound data, an imaging device that adjusts the time managed by the time processing unit to the time when the registered sound data was emitted, and
An imaging system.

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