JP2009296207A - Monitored video recording system, and monitored video reproducing and displaying method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitored video recording system which does not need a sensor for detecting occurrence of an abnormality, and can obtain both smooth moving picture and high quality video while suppressing an increase in a data size. <P>SOLUTION: A network recorder 4 receives both data of an MPEG-4 standard and data of a JPEG standard, and records them in a built-in hard disk (not shown) being a recording medium. In such a case, a time stamp is attached as metadata to both the data of an MPEG-4 standard and the data of a JPEG standard. By using the time stamp, the data of an MPEG-4 standard can be associated with the data of a JPEG standard with a photographing time as a reference to be recorded. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a surveillance video recording system, and also relates to a surveillance video reproduction display method.

  Conventionally, a surveillance video recording system using an unmanned surveillance camera that takes an image of the inside of a store or the street with an unattended surveillance camera, converts it into data, transmits it by a transmission device, and records it in a recording device via a reception device placed at a remote location Is widely used. As the video to be recorded here, it is desirable to record a moving image as smooth as possible in order to find out that an abnormality has occurred in the monitoring target. On the other hand, in order to analyze the state at the time of occurrence of an abnormality, it is desirable to record an image with as high a quality as possible. For example, when a surveillance video recording system is installed in a shop for shoplifting measures, a smooth video with many frames per second may be recorded in order to reliably capture the moment when shoplifters shoplift goods. preferable. In addition, in order to analyze the image to identify the shoplifter's personality and characteristics, shoplifted products, etc., a high-quality video is recorded as a single video (image taken as a still image) It is preferable.

  However, if a smooth moving image with a large number of frames per second and a video with high image quality per frame are converted into data, the data size increases. When data with such a large data size is transmitted and received, the communication load increases, and when data with a large data size is recorded, a large amount of recording medium is used. Therefore, it is conceivable to handle data with a large data size by increasing the speed of the communication network and increasing the capacity of the recording medium. However, an unlimited increase in the communication speed and an increase in the capacity of the recording medium are factors that increase costs. It becomes the enlargement factor of the whole system. In particular, when it is necessary to store data for a long period of time, an extremely large capacity of the recording medium is required, which is an unrealistic measure. Although it is possible to reduce the data size by compressing the data, there is a limit to the degree of compression. Further, in order to highly compress data, a powerful data compression device is required. However, provision of a powerful data compression device also causes an increase in cost and enlargement of the system.

Therefore, it is possible to realize sufficient recording time by recording only necessary monitoring video information at a high rate without increasing the video data capacity to be recorded and without wasting the capacity of the recording medium. A video recording device and a monitoring video recording system have been proposed (for example, Patent Document 1). According to this technology, “a plurality of monitoring video signals from the present to a certain period of time are always accumulated in the accumulation means. When the abnormality detection means detects the presence or absence of abnormality based on abnormality information from the outside, the control means The rate control means performs control to record each monitoring video signal stored in the storage means on the recording medium with the corresponding recording rate value read from the rate table according to the combination. A monitoring video signal that is highly necessary to be recorded in combination with abnormality information such as a location is recorded on a recording medium at a high recording rate for a certain period retroactively from the time of abnormality detection. The monitoring video signal is recorded at a low recording rate. " That is, when an abnormality is detected, only the video that is highly necessary to be recorded before and after the time when the abnormality occurs is recorded with high image quality, and the other images are recorded with low image quality. It is said that an increase in capacity can be suppressed.
Japanese Utility Model Publication No. 2006-339982

  However, even when the method according to Patent Document 1 is used, large data size data must be transmitted and received between the camera and the storage means (buffer), and an increase in communication load is inevitable. Further, in order to detect an abnormality, a sensor for detecting the occurrence of the abnormality is essential, which causes a cost increase. Moreover, since the abnormalities caught by the sensor are limited, the scenes to which this system can be applied are also limited. In other words, it is impossible to prepare sensors corresponding to all the abnormalities that can occur under a situation where it is unknown what kind of abnormality will occur, and this system cannot be used. In other words, this system can be used only when the type of abnormality that occurs is expected. Furthermore, it is difficult to set how far back to record from the time of constant detection. For example, with regard to the above shoplifting, shoplifting cannot be determined by simply picking up the product, and the shoplifter will not settle for an outbreak without first paying for it. A shoplifter may stay in the store for a long time after picking up the product. In such a case, in order to reliably record the "video that is highly necessary to record before and after", It is extremely difficult to determine how much time is "and to set the recording time based on such determination.

  The present invention has been made in view of such circumstances, and is a surveillance video recording system that does not require a sensor for detecting the occurrence of an abnormality, and smooth video and high-quality video while suppressing an increase in data size. It is an object of the present invention to provide a surveillance video recording system that can be obtained together.

  The surveillance video recording system according to the present invention includes a surveillance camera that outputs captured surveillance video as moving image data and image data having higher image quality than the moving image data, and the moving image data and the image data corresponding to each other. A recording device for recording.

  According to the above configuration, monitoring is performed because the video camera includes the moving image data, the monitoring camera that outputs the image data as high-quality image data compared to the moving image data, and the recording device that records the moving image data and the image data in association with each other. Both moving image data for detecting that an abnormality has occurred in the object and image data for analyzing the state at the time of occurrence of the abnormality are recorded in the recording device. Further, since the moving image data and the image data are recorded in correspondence with each other, for example, when it is confirmed that an abnormality has occurred in the monitoring target due to the moving image, the corresponding high-quality image data can be easily specified. . Therefore, it is possible to confirm in detail the state at the time when an abnormality has occurred due to high-quality image data.

  Furthermore, since the moving image data and the image data are recorded in correspondence with each other, it is not necessary for the moving image data to have a high image quality like the image data. Therefore, the data size can be reduced compared to the case of recording moving image data having a high image quality like the image data, so that both the communication load and the capacity of the recording medium can be reduced. In addition, for example, an additional device for determining whether or not to record moving image data having a large data size as compared with the conventional method of recording moving image data with high image quality only when there is an abnormality in the monitoring target For example, a sensor or the like for detecting an abnormality of the monitoring target is not required, and thus the cost can be reduced.

  The monitoring video recording system according to the present invention further includes a network to which the monitoring camera and the recording device are connected and to transmit the moving image data and the image data output by the monitoring camera to the recording device. preferable.

  According to the above configuration, since the surveillance camera and the recording device are connected, and further provided with a network for transmitting the moving image data and the image data output by the surveillance camera to the recording device, the recording device is provided at a location away from the surveillance camera. Can be provided. Therefore, the degree of freedom of the installation location of the surveillance video recording system is increased.

  The monitoring video playback and display method according to the present invention is a form in which the image data recorded by the monitoring video recording system according to the present invention can be viewed based on the moving image data recorded by the monitoring video recording system according to the present invention. Use to play back and display.

  According to the above configuration, based on the moving image data, the image data is reproduced and displayed in a visually recognizable form. Therefore, during the reproduction of the moving image data, for example, by pressing the still image display button or the like, Thus, the image data can be reproduced and displayed in a visible form. Accordingly, as soon as it can be confirmed that an abnormality has occurred in the recorded object, it is possible to analyze the situation at the time of occurrence of the abnormality by displaying the image data.

  The monitoring video reproduction display method according to the present invention reproduces and displays the moving image data and the image data recorded by the monitoring video recording system according to the present invention in a form that can be viewed simultaneously.

  According to the above configuration, since the moving image data and the image data are reproduced and displayed in a form that can be viewed at the same time, while confirming that an abnormality has occurred in the target recorded by the moving image data, Analysis can be performed.

  The monitoring video reproduction display method according to the present invention reproduces and displays the image data together with a plurality of thumbnails while the moving image data recorded by the monitoring video recording system according to the present invention is reproduced and displayed.

  According to the above configuration, since the image data is reproduced and displayed together with a plurality of thumbnails while the moving image data is being reproduced and displayed, the image recorded while confirming that an abnormality has occurred in the target recorded by the moving image data. It is possible to analyze the situation at the time of occurrence of abnormality by the data. In addition, since a plurality of thumbnails are reproduced and displayed at the same time, the relationship between the moving image data and the still image data is visually easy to understand.

  According to the present invention, there is provided a monitoring video recording system that does not require a sensor for detecting the occurrence of an abnormality, and is capable of obtaining both a smooth video and a high-quality video while suppressing an increase in data size. A recording system can be provided.

  An embodiment of a surveillance video recording system and a surveillance video reproduction / display method embodying the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, an image captured by a monitoring camera 1 is monitored in real time by a monitoring monitor 3 via a network 2 and recorded on a network recorder 4 as a recording device. This surveillance camera 1 has a built-in data conversion device, and transmits captured video as video data and 15 videos of 640 × 480 pixels per second according to the MPEG-4 standard. At the same time, 1280 × 960 pixel images are transmitted as image data in six seconds per JPEG standard. Accordingly, when compared on a per-frame basis, the image data has four times the number of pixels as compared to the video data, so the image quality is high, but the data size is also larger than the video data.

即ち、３５％送信するデータサイズを削減することが可能となるため、ネットワーク２における通信負荷をその分だけ小さくすることが可能となる。 Thus, by transmitting together the moving image data composed of video data having a relatively small data size and the image data composed of image data having a relatively large data size, a high-quality moving image equivalent to the image data is transmitted. The communication load on the network 2 can be reduced compared to the case where data is distributed. If 15 pieces of data having image quality equivalent to that of image data are transmitted in 15 seconds, it is necessary to send data of 1280 × 960 × 15 = 184432000 pixels per second. On the other hand, if it is the transmission method described above,
Image data + moving image data = 1280 × 960 × 6 + 640 × 480 × 15
= 7372800 + 4608000
= 11980800
Therefore, it is only necessary to transmit data of 11980800 pixels per second. When the difference is calculated as a ratio,

That is, since it is possible to reduce the data size to be transmitted by 35%, the communication load in the network 2 can be reduced accordingly.

  The MPEG-4 standard data and the JPEG standard data are transmitted to the monitoring monitor 3 and the network recorder 4 via the network 2. The monitor 3 for monitoring selectively receives only the data of the MPEG-4 standard, converts the data of the MPEG-4 standard into a moving image by a built-in analog-digital converter (not shown), and reproduces it as a moving image. (Not shown) monitors this video.

  On the other hand, the network recorder 4 receives both MPEG-4 standard data and JPEG standard data, and records them on a built-in hard disk (not shown) as a recording medium. At this time, both the MPEG-4 standard data and the JPEG standard data are time stamped as metadata. By using this time stamp, it is possible to record MPEG-4 standard data and JPEG standard data in association with each other based on the shooting time.

  By recording image data and low-quality moving image data corresponding to the image data in this way, the load on the built-in hard disk is reduced compared to the case where moving image data is recorded with high image quality like image data. Can be lowered. This is because the number of recorded high-quality image data can be reduced. Since the data size to be recorded is the same as the data size to be transmitted as described above, the calculation is omitted. Similarly, the data size to be recorded can be reduced by 35%. It becomes possible to make it small.

  Furthermore, a playback monitor 5 is connected to the network recorder 4 so that video based on arbitrarily recorded moving image data and image data can be displayed. As shown in FIG. 2, a small window 51, a large window 52, operation keys 53, a still image display button 54, a thumbnail window 55, and the like are fixedly displayed on the playback monitor 5 on a touch panel screen. By using the operation key 53, a moving image based on the moving image data can be reproduced on a small screen. During the reproduction of the moving image, the image based on the image data is continuously displayed in the thumbnail window 55 corresponding to the time series of the moving image. By selecting an arbitrary thumbnail on the touch panel 50 in this state, a still image can be enlarged and displayed on the large window 52. Further, when the still image display button 54 is selected, the image data corresponding to the moving image reproduced at the moment when the still image display button 54 is selected, more specifically, the time stamp of the moving image data at the moment when the still image display button 54 is selected. A still image based on the image data having the time stamp closest to can be enlarged and displayed on the large window 52. Therefore, it is possible to easily identify the moment when an abnormality occurs in the monitoring target by the moving image, and confirm the detailed state at the time of the abnormality by the still image that is associated with the moving image and can be easily selected. Is possible.

  This reproduction monitor 5 is a surveillance video reproduction display device to which the surveillance video reproduction display method of the present invention is applied. The reproduction monitor 5 has an internal circuit 60 as shown in FIG. The MPEG-4 standard data and the JPEG standard data transmitted from the network recorder 4 are separated by the interface 61, sent to the MPEG-4 decoding circuit 62 and the JPEG decoding circuit 63, respectively, and combined. The signals combined by the MPEG-4 decoding circuit 62 and the JPEG decoding circuit 63 are converted into analog data by the digital-analog converter 64 and the digital-analog converter 65, respectively, and sent to the display block management circuit 66. After the display block management circuit 66 determines the display position on the display 67, the display position is displayed on the display 67 configured by the touch panel 50. For this reason, the moving image data and the video data are displayed together on the display 67 of the reproduction monitor 5.

  On the other hand, the time stamp information recorded in the metadata is transmitted from the MPEG-4 decoding circuit 62 and the JPEG decoding circuit 63 to the synchronization circuit 68. The synchronization circuit 68 synchronizes the image data and the moving image data by adjusting the processing speed of the digital-analog converter 64 and the digital-analog converter 65 based on the time stamp information. For this reason, the displayed moving image data and video data are always synchronized.

  In addition, when an operation is performed on the touch panel 50, display information is changed by transmitting position information on the touch panel 50 sensed by a touch sensor provided on the touch panel 50 to the display block management circuit 66. Can do. For example, when a still image displayed on the thumbnail window 55 is touched while a moving image is displayed on the small window 51 as described above, the touched still image is enlarged and displayed on the large window 52.

    According to the digital signal receiving apparatus of the above embodiment, the following effects can be obtained.

  (1) According to the above embodiment, the surveillance camera 1 that outputs moving image data and image data with higher image quality than the moving image data, and the recording device that records the moving image data and the image data in association with each other. Since the network recorder 4 is provided, the moving image data for detecting that an abnormality has occurred in the monitoring target and the image data for analyzing the state at the time of the abnormality are recorded in the recording device. In addition, since the moving image data and the still image data are recorded in correspondence with each other, for example, when it is confirmed that an abnormality has occurred in the monitoring target due to the moving image, it is possible to easily identify the corresponding high-quality image data. it can. Therefore, it is possible to confirm in detail the state at the time when an abnormality has occurred due to high-quality image data.

  (2) According to the above embodiment, since moving image data and image data are recorded in correspondence with each other, it is not necessary for the moving image data to have a high image quality like the image data. Therefore, the data size can be reduced compared to the case of recording moving image data having a high image quality like the image data, so that both the communication load and the capacity of the recording medium can be reduced. In addition, for example, an additional device for determining whether or not to record moving image data having a large data size as compared with the conventional method of recording moving image data with high image quality only when there is an abnormality in the monitoring target For example, a sensor or the like for detecting an abnormality of the monitoring target is not required, and thus the cost can be reduced.

  (3) According to the above embodiment, the surveillance camera 1 and the network recorder 4 are connected, and the surveillance camera 1 is further provided with the network 2 for transmitting the moving image data and the image data output by the surveillance camera to the recording device. A network recorder 4 can be provided at a location away from the network. Therefore, the degree of freedom of the installation location of the surveillance video recording system is increased.

  (4) According to the above configuration, based on the moving image data, the image data is reproduced and displayed in a visually recognizable form. Therefore, when the moving image data is being reproduced, the operation of pressing the still image display button 54 changes the moving image data being reproduced. Based on this, the image data can be reproduced and displayed in a visually recognizable form. Accordingly, as soon as it can be confirmed that an abnormality has occurred in the recorded object, it is possible to analyze the situation at the time of occurrence of the abnormality by displaying the image data.

  (5) According to the above embodiment, since the moving image data and the image data are reproduced and displayed in a form that can be viewed at the same time, an abnormality has occurred in the image data while confirming that an abnormality has occurred in the target recorded by the moving image data. It becomes possible to analyze the situation of time.

  (6) According to the above embodiment, since the image data is reproduced and displayed together with a plurality of thumbnails while the moving image data is being reproduced and displayed, it is confirmed that an abnormality has occurred in the target recorded by the moving image data. However, it is possible to analyze the situation at the time of occurrence of abnormality by using the image data. In addition, since a plurality of thumbnails are reproduced and displayed at the same time, the relationship between the moving image data and the still image data is visually easy to understand.

  In addition, you may change the said embodiment as follows.

  In the reproduction monitor 5 used in the monitoring video recording system in the above embodiment, the thumbnail window 55 is displayed in the touch panel screen, but another configuration may be used. For example, as shown in FIG. 4, a configuration in which thumbnail display is omitted may be employed. When the still image display button 54 is selected while confirming the moving image even if there is no thumbnail display, the still image associated with the moving image reproduced at the moment when the still image display button 54 is selected is displayed in the large window 52. The display can be enlarged. Therefore, it is possible to easily identify the moment when an abnormality occurs in the monitoring target due to the moving image, and it is possible to check the detailed state when the abnormality occurs with the still image corresponding to the moving image. Further, by omitting the thumbnail display, if the size of the touch panel is the same, other display windows can be enlarged, and the load on the monitoring video reproduction display device can be reduced.

  In the playback monitor 5 in the above embodiment, the small window 51, the large window 52, the operation key 53, the still image display button 54, the thumbnail window 55, etc. are fixedly displayed on the touch panel screen. It may be a configuration. For example, as shown in FIG. 5, the window having the small window 51, the operation key 53, and the still image display button 54 and the large window 52 may be displayed without being fixed in position. Even if the large window 52 is temporarily hidden as shown in FIG. 5, if a configuration is adopted in which the large window 52 is preferentially displayed by operating the large window 52, the detailed state when the abnormality occurs is confirmed. It is possible. Further, by not fixing the position of each window, it is possible to enlarge and display only the necessary windows up to the entire touch panel 50.

  In the above embodiment, the display screen of the reproduction monitor 5 is the touch panel 50, but other configurations may be used. That is, since it is only necessary to reproduce a moving image or display a still image, it may be operated using a separate keyboard, mouse, trackball, or the like. In that case, if unnecessary, the operation key 53 may not be displayed on the screen.

即ち、大データサイズの動画データを保存する場合に比較して、６８．３％送信および記録するデータサイズを削減することが可能となるため、ネットワーク２における通信負荷およびネットワークレコーダ４のデータ保存負荷を一層小さくすることが可能となる。 In the surveillance video recording system in the above embodiment, image data is recorded at six frames per second, but other configurations may be used. For example, if the image data is set to 1 per second,
Image data + moving image data = 1280 × 960 × 1 + 640 × 480 × 15
= 12228800 + 4608000
= 5836800
So

That is, since it is possible to reduce the data size to be transmitted and recorded by 68.3% as compared with the case of storing moving image data having a large data size, the communication load in the network 2 and the data storage load of the network recorder 4 are reduced. Can be further reduced.

  Here, since the occurrence of an abnormality in the monitoring target can be confirmed with a video based on the recorded moving image data, it is sufficient that the image data can confirm details when the abnormality occurs. Therefore, the number of pieces of video data to be transmitted and recorded per second is necessary in consideration of the monitoring target, the monitoring purpose, the allowable network load, the capacity of the recording medium, and the length between recording holders. It can be set accordingly. Further, when the network load increases due to other factors, a non-fixed setting such as transmission with a reduced number of frames may be used.

  In the above embodiment, the moving image data is transmitted and recorded using the MPEG-4 standard and the image data data using the JPEG standard. However, other configurations may be used. For example, another standard such as MPEG-2 or TIFF may be used, or an original standard may be used.

  In the above embodiment, the image data is data for still images, but other configurations may be used. For example, high-quality moving image data with high pixels or low compression may be used. When high-quality moving image data is used as the image data, for example, Motion JPEG standard data can be easily cut out as a still image and can be suitably used.

  In the above embodiment, the monitoring monitor 3 is connected to the network 2 and monitoring is performed in real time, but other configurations may be used. For example, when it is not intended to detect an abnormality in the monitoring target early, the cost can be reduced by omitting the monitoring monitor 3.

  In the above embodiment, the network recorder 4 has a built-in hard disk as a recording medium, but may have other configurations. That is, any recording medium having a capacity necessary for recording may be used, and not only a write-once medium such as a Blu-ray disc and a DVD but also a memory medium such as a flash memory.

  In the above embodiment, the surveillance camera 1 and the network recorder 4 are connected via the network 2, but other configurations may be used. That is, it can be said that the surveillance video recording system of the present invention is applied to any system including the surveillance camera 1 and the network recorder 4 as a surveillance video recording device as components. For example, the surveillance video recording system of the present invention may be applied to a simple system in which the surveillance camera 1 and the network recorder 4 are directly connected by a cable.

  The present invention relates to a surveillance video recording system and an invention relating to a surveillance video playback / display method, and therefore can be widely used in industry.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining an embodiment of a surveillance video recording system and a surveillance video reproduction display method according to the present invention, and is a block diagram of the surveillance video recording system. 1 is a diagram for explaining an embodiment of a monitoring video reproduction display method according to the present invention, and is a diagram showing a display of a reproduction monitor. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining an embodiment of a surveillance video recording system and a surveillance video reproduction display method according to the present invention, and is a block diagram of a reproduction monitor internal circuit. It is drawing explaining the example of a change of the monitoring video reproduction | regeneration display method concerning this invention, Comprising: It is drawing which shows the display of the monitor for reproduction | regeneration. It is drawing explaining the other example of the monitoring image | video reproduction | regeneration display method concerning this invention, Comprising: It is drawing which shows the display of the monitor for reproduction | regeneration.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Surveillance camera, 2 ... Network, 3 ... Monitoring monitor, 4 ... Network recorder (recording apparatus), 5 ... Reproduction monitor, 50 ... Touch panel, 51 ... Small window, 52 ... Large window, 53 ... Operation key, 54 ... Still image display button, 55 ... Thumbnail window, 60 ... Internal circuit, 61 ... Interface, 62 ... MPEG-4 decoding circuit, 63 ... JPEG decoding circuit, 64 ... Analog converter, 65 ... Analog converter, 65 ... Analog converter , 66 ... Display block management circuit, 67 ... Display, 68 ... Synchronization circuit.

Claims (5)

  A monitoring camera that outputs the captured monitoring video as moving image data and image data with higher image quality than the moving image data, and a recording device that records the moving image data and the image data in association with each other. Surveillance video recording system.   2. The monitoring according to claim 1, further comprising a network that is connected to the monitoring camera and the recording device, and that transmits the moving image data and the image data output by the monitoring camera to the recording device. Video recording system.   The image data recorded by the surveillance video recording system according to claim 1 is reproduced and displayed in a viewable form based on the moving image data recorded by the surveillance video recording system according to claim 1 or 2. A method for reproducing and displaying surveillance video, characterized in that:   A method for reproducing and displaying a monitoring image, wherein the moving image data and the image data recorded by the monitoring image recording system according to claim 1 or 2 are reproduced and displayed in a form that can be viewed simultaneously.   3. A surveillance video reproduction display, wherein the image data is reproduced and displayed together with a plurality of thumbnails in a state where the video data recorded by the surveillance video recording system according to claim 1 is reproduced and displayed. Method.

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