JP2012015831A - Video processing device, video processing system, and video processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video processing device which can restrain a increase in stream data amount and data processing amount depending on the display form of a video.SOLUTION: A video processing device performs processing for displaying a video acquired from at least one camera to acquire two kinds of video data corresponding to different settings on a display device. The video processing device comprises: a network processing part to perform communication through a camera and a network; a video output part to perform processing for displaying the video of data acquired from the camera by the network processing part on the display device in a prescribed display form; a setting determination part to determine a setting for reference when the camera acquires the video data. The network processing part notifies the camera of the setting determined by the setting determination part.

Description

  The present invention relates to a video processing apparatus, a video processing system, and a video processing method for processing to display a video from a surveillance camera.

  The network recorder can display or record a video of a remote location by receiving video data from a surveillance camera installed at a remote location via a network. The surveillance camera encodes according to settings such as a preset resolution and frame rate, and transmits the encoded data to the network recorder by streaming.

  Some surveillance cameras used these days can acquire a plurality of types of video data according to a plurality of different settings. The contents of the plural types of video data are the same. Such a monitoring camera can obtain, for example, display video data with a resolution of 1280 × 960 and a frame rate of 30 frames / second, and recording video data with a resolution of 640 × 480 and a frame rate of 30 frames / second. It is. The surveillance camera encodes each video data, and then transmits the display stream data and the recording stream data to the network recorder via the network. The network recorder processes each of the display stream data and the recording stream data, displays the video obtained from the display stream data on a monitor, and displays the video data obtained from the recording stream data on a recording medium such as a hard disk. Record.

JP 2003-179891 A JP 2004-289726 A JP 2008-167207 A

  4 and 5 are diagrams showing an example of the configuration of a system including the monitoring camera and the network recorder described above. In the example shown in FIG. 4, four monitoring cameras 11 </ b> A to 11 </ b> D are connected to the hub 13 connected to the network 15, and the network recorder 17 is also connected to the network 15. The monitoring cameras 11 </ b> A to 11 </ b> D can transmit display stream data and recording stream data to the network recorder 17 via the network 15. The display video data acquired by each of the monitoring cameras 11 </ b> A to 11 </ b> D has a resolution and a resolution that can realize sufficient visibility when only the video from any one of the monitoring cameras is displayed on the entire monitor (one-screen display). This is data acquired based on settings such as a frame rate (for example, a resolution of 1280 × 960 and a frame rate of 30 frames / second).

  A monitor 19 and an external interface such as a mouse are connected to the network recorder 17. The external interface is provided for the user of the network recorder 17 to select a monitoring camera that displays an image on the monitor 19. The network recorder 17 sends a command such as cgi that instructs the selected monitoring camera to transmit the video stream data via the network 15.

  In the example shown in FIG. 4, it is set so that only the video of the monitoring camera 11 </ b> A is displayed on the monitor 19. In this case, the network recorder 17 receives display stream data and recording stream data from the monitoring camera 11A, and receives recording stream data from the other monitoring cameras 11B, 11C, and 11D. The network recorder 17 processes the display stream data from the monitoring camera 11A, and displays the video obtained from the display stream data on the monitor 19. The network recorder 17 records each video data obtained from the recording stream data from the monitoring cameras 11A to 11D on an internal hard disk (not shown).

  On the other hand, in the example shown in FIG. 5, the video of the monitoring cameras 11 </ b> A to 11 </ b> D is set to be displayed on the monitor 19 in a four-divided form (4-divided screen display). In this case, the network recorder 17 receives the display stream data and the recording stream data from each of the monitoring cameras 11A to 11D. The network recorder 17 processes each display stream data from the monitoring cameras 11A to 11D, and adjusts the resolution and the like of each video data obtained from the display stream data so as to match the display form of the quad screen display. Each image is displayed on the monitor 19. The network recorder 17 records each video data obtained from the recording stream data from the monitoring cameras 11A to 11D on the internal hard disk.

  As described above, the network recorder 17 performs processing so as to display one or more videos from the monitoring camera desired by the user. However, the amount of stream data transmitted from the monitoring cameras 11A to 11D to the network recorder 17 via the network 15 increases as the number of videos simultaneously displayed increases. However, an increase in the amount of stream data is not preferable in terms of network traffic. Further, when simultaneously displaying a plurality of videos, the network recorder 17 must adjust the resolution of each video data obtained from the display stream data so as to match the display form at that time. For this reason, the amount of data processing in the network recorder 17 when dividing and displaying a plurality of videos is increased.

  An object of the present invention is to provide a video processing apparatus, a video processing system, and a video processing method capable of suppressing an increase in the amount of stream data and an increase in the amount of data processing according to a video display form.

  The present invention is a video processing apparatus that performs processing for displaying a video obtained from at least one camera that acquires two types of video data according to different settings on a display device, and communicates with the camera via a network. A network processing unit that performs the processing, a video output unit that performs processing for displaying the video of the video data acquired from the camera by the network processing unit on the display device in a predetermined display mode, and a plurality of display modes. A setting determining unit that determines a setting to be referred to when the camera acquires video data according to a display form, and the network processing unit stores the setting determined by the setting determining unit in the camera. Provided is a video processing device for notification.

  In the video processing apparatus, the setting determination unit determines a setting to be referred to when the camera acquires video data according to a load on the video output unit.

  In the video processing device, the number of videos simultaneously displayed on the display device differs depending on a display form, and the setting determination unit is configured to have a case where the number of videos displayed on the display device is one and a plurality of cases. At least one of the resolution and the frame bit is determined to be a different setting.

  In the video processing device, when the number of videos to be displayed on the display device is plural, the setting determination unit determines at least one of the resolution and the frame bit from the setting determined when the number of the videos is one. Decide on a low setting.

  The present invention provides at least one camera that acquires two types of video data according to different settings, a display device that displays video obtained from the camera, and a process that displays video obtained from the camera on the display device. A video processing system comprising: a network processing unit that communicates with the camera via a network; and the video data acquired from the camera by the network processing unit. A video output unit that performs a process of displaying the video in a predetermined display form on the display device, and the camera refers to when acquiring video data according to a display form selected from a plurality of display forms A setting determination unit for determining a setting, wherein the network processing unit notifies the camera of the setting determined by the setting determination unit. To provide a Temu.

  The present invention is a video processing method for performing processing for displaying video obtained from at least one camera that acquires two types of video data according to different settings on a display device, and is selected from a plurality of display forms In accordance with the displayed form, the camera determines a setting to be referred to when acquiring video data, notifies the determined setting to the camera, and responds to the determined setting transmitted from the camera. A video processing method is provided for receiving the received video data via a network and displaying the received video data on the display device in a predetermined display form.

  According to the video processing device, the video processing system, and the video processing method according to the present invention, it is possible to suppress an increase in the amount of stream data and an increase in the amount of data processing according to the video display form.

The figure which shows the structure of the system of one Embodiment provided with the surveillance camera and the network recorder. The flowchart which shows the determination method of the setting for a display which CPU203 performs when a display form is switched by the user. The flowchart which shows the determination method of the setting for a display which CPU203 performs when the load of the display process in the video output part 205 is high. The figure which shows an example of a structure of the system provided with the surveillance camera and the network recorder The figure which shows an example of a structure of the system provided with the surveillance camera and the network recorder

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of a video processing system according to an embodiment including a surveillance camera and a network recorder. The video processing system shown in FIG. 1 includes four monitoring cameras 101A to 101D, a hub 103, a network 105, a network recorder 107, and a monitor 109. In this system, four monitoring cameras 101 A to 101 D are connected to a hub 103 connected to a network 105, and a network recorder 107 is also connected to the network 105.

  The monitoring cameras 101A to 101D acquire two types of video data according to two different settings (resolution and frame rate). The contents of the two types of video data are the same. One of the two settings is, for example, a resolution of 1280 × 960 and a frame rate of 30 frames / second. The video data acquired according to the setting (hereinafter referred to as “display setting”) is used as “display video data”. The other of the two settings is, for example, a resolution of 640 × 480 and a frame rate of 30 frames / second. The video data acquired in accordance with the setting (hereinafter referred to as “recording setting”) is used as “recording video data”. In the present embodiment, each display setting in the monitoring cameras 101A to 101D is appropriately designated by a command such as cgi transmitted from the network recorder 107. On the other hand, the recording setting is not changed from the initial setting.

  The monitoring cameras 101A to 101D encode each video data according to each of the video settings and the recording settings, and transmit the encoded data to the network recorder 107 by streaming via the network 105. In the following description, stream data obtained by encoding display video data is referred to as “display stream data”, and stream data obtained by encoding recording video data is referred to as “recording stream data”. The monitoring cameras 101A to 101D transmit both display stream data and recording stream data only when instructed by the network recorder 107, and transmit only recording stream data when there is no instruction.

  The network recorder 107 includes a network processing unit 201, a CPU 203, a video output unit 205, a memory 207, a hard disk (HDD) 209, and a GUI processing unit 211. The network processing unit 201 receives stream data transmitted from the monitoring camera via the network 105. In addition, the network processing unit 201 transmits a command regarding display setting or display stream data transmission to the monitoring camera via the network 105.

  The CPU 203 acquires video data from the stream data received by the network processing unit 201. The display video data acquired from the display stream data is sent to the video output unit 205. On the other hand, the video data for recording acquired from the stream data for recording is recorded on the hard disk 209. The CPU 203 reads the recording video data from the hard disk 209 and reproduces the recorded video. In addition, the CPU 203 receives information indicating the content of the operation performed by the user of the network recorder 107 using the external interface (external I / F) 213, and performs processing according to the operation. Further, the CPU 203 determines the display setting in the monitoring camera that transmits the display stream data in accordance with a display form to be described later or an operation rate of the video output unit 205. Details of the display setting determination method by the CPU 203 will be described later.

  The video output unit 205 performs processing for displaying the video of the display video data on the monitor 109 in a predetermined display form. The display form that can be displayed on the monitor 109 is a one-screen display that displays video of display video data of any one of the monitoring cameras, or display video data of at least two of the monitoring cameras 101A to 101D. This is a split screen display for displaying video. When the user of the network recorder 107 selects a desired display form from among a plurality of display forms using the external interface 213, information on the selected display form is stored in the memory 207. The video output unit 205 refers to the memory 207 to determine a display form such as single screen display or quad screen display. In addition, the video output unit 205 notifies the CPU 203 of the operation rate of the video output unit 205. The operating rate of the video output unit 205 is higher as the number of videos displayed simultaneously on the screen of the monitor 109 is higher.

  The memory 207 includes information such as the IP address and type of each monitoring camera, information regarding necessity of transmission of display stream data to each monitoring camera and display settings, and information on a display form referred to by the video output unit 205 Remember. The hard disk 209 is a recording medium that stores video data for recording.

  The GUI processing unit 211 analyzes the content of the operation performed on the basis of the GUI by the user of the network recorder 107 using the external interface 213 and notifies the CPU 203 or the video output unit 205 of the analysis result. In addition, the GUI processing unit 211 generates drawing data other than the video of the monitoring camera displayed on the monitor 109.

  Hereinafter, a display setting determination method (video processing method) by the CPU 203 included in the network recorder 107 of the present embodiment will be described in detail. There are two types of determination methods.

(1) When the display mode is switched by a user operation When the CPU 203 displays the video of any one of the surveillance cameras on one screen, the resolution equivalent to the number of pixels (for example, 1280 × 960) in the video display area of the monitor 109 The high frame rate (for example, 30 frames / second) is determined as the display setting for the monitoring camera. On the other hand, when the CPU 203 divides the monitor 109 into four and displays all the images of the monitoring cameras 101A to 101D on the monitor 109 at the same time, the resolution is lower than the resolution set when displaying one screen (for example, 640 × 480). ) And a low frame rate (for example, 10 frames / second) are determined as display settings for each monitoring camera. Therefore, when the display mode is switched by the user, the CPU 203 performs network processing so as to transmit a command instructing acquisition of display video data based on the display settings corresponding to the display mode after switching to the corresponding monitoring camera. The unit 201 is instructed.

  FIG. 2 is a flowchart illustrating a display setting determination method performed by the CPU 203 when the display form is switched by the user. As shown in FIG. 2, the CPU 203 receives a display mode switching instruction from the external interface 213 (step S101). Next, the CPU 203 determines a resolution and a frame rate corresponding to the display form that has received the switching instruction as display settings (step S103). Next, the CPU 203 instructs the network processing unit 201 to transmit a display setting command to the surveillance camera (step S105).

(2) When the load of display processing in the video output unit 205 is high When the operating rate of the video output unit 205 is equal to or less than the threshold, the CPU 203 determines that the resolution is high (eg, 1280 × 960) 30 frames / second) is determined as the display setting of the surveillance camera that is capturing the image displayed on the monitor 109. On the other hand, when the operating rate of the video output unit 205 exceeds a threshold value (for example, 95%), the CPU 203 has a low resolution (for example, 640 × 480) and a low frame rate (for example, 7.5 frames / second). ) Is determined as the display setting of the surveillance camera that is capturing the video displayed on the monitor 109. Therefore, when the operating rate of the video output unit 205 crosses the threshold value, the CPU 203 sets a command to instruct acquisition of display video data based on the display settings corresponding to the changed operating rate to the corresponding monitoring camera. To the network processing unit 201.

  FIG. 3 is a flowchart illustrating a display setting determination method performed by the CPU 203 when the display processing load in the video output unit 205 is high. As shown in FIG. 3, the CPU 203 compares the operating rate notified from the video output unit 205 with a threshold value (step S201). Next, the CPU 203 instructs the network processing unit to transmit a command for changing the display setting set in the monitoring camera (step S203).

  As described above, in the present embodiment, the display setting in the monitoring camera is changed according to the form (display form) of displaying the video of the monitoring camera on the monitor 109. In particular, when a split screen is displayed in which the number of images displayed simultaneously is large and the size per image is smaller than that when displaying one screen, the resolution and the low frame rate lower than the resolution set when displaying one screen are monitored. It is determined as the camera display setting. As a result, the amount of display stream data transmitted from one monitoring camera can be suppressed. Further, since the CPU 203 of the network recorder 107 does not have to perform processing for changing the size of the video displayed on the monitor 109, the data processing amount in the CPU 203 can be reduced.

  Further, the display setting of the monitoring camera that is transmitting the video stream data is changed according to the operating rate of the video output unit 205 of the network recorder 107. Therefore, when the operation rate is high, the display setting of the monitoring camera is changed to a low resolution and a low frame rate in order to suppress the data processing amount of the video output unit 205. As a result, the data size of the display video data is reduced, so that the load on the video output unit 205 can be reduced.

  In the above description, the method for determining the display setting by the CPU 203 is described separately, but these may be combined. That is, when the operating rate of the video output unit 205 exceeds a threshold value in the split screen display mode or when the operating rate of the video output unit 205 exceeds the threshold value, the display mode is split from the single screen display. When switching to the screen display, the CPU 203 instructs the network processing unit 201 to send a command to the surveillance camera to further reduce the resolution and frame rate.

  The video processing device according to the present invention is useful as a control device that can control the setting of the monitoring camera in accordance with the display form of the monitor.

101A to 101D Monitoring camera 103 Hub 105 Network 107 Network recorder 109 Monitor 201 Network processing unit 203 CPU
205 Video output unit 207 Memory 209 Hard disk (HDD)
211 GUI processing unit 213 External interface (external I / F)

Claims (6)

A video processing device that performs processing to display a video obtained from at least one camera that acquires two types of video data according to different settings on a display device,
A network processing unit for communicating with the camera via a network;
A video output unit for performing processing for displaying video of video data acquired from the camera by the network processing unit on the display device in a predetermined display form;
A setting determining unit that determines a setting to be referred to when the camera acquires video data in accordance with a display mode selected from a plurality of display modes;
The video processing apparatus, wherein the network processing unit notifies the camera of the setting determined by the setting determination unit. The video processing apparatus according to claim 1,
The video processing apparatus, wherein the setting determination unit determines a setting to be referred to when the camera acquires video data according to a load of the video output unit. The video processing device according to claim 1 or 2,
The number of images simultaneously displayed on the display device differs depending on the display form,
The video processing apparatus, wherein the setting determination unit determines at least one of a resolution and a frame bit depending on whether the number of videos displayed on the display device is one or more. The video processing apparatus according to claim 3,
The setting determination unit determines, when there are a plurality of images displayed on the display device, at least one of a resolution and a frame bit lower than a setting determined when the number of the images is one. A video processing apparatus characterized by the above. At least one camera that acquires two types of video data according to different settings;
An image obtained from the camera, and a display device;
A video processing system comprising: a video processing device that performs processing for displaying video obtained from the camera on the display device;
The video processing device includes:
A network processing unit for communicating with the camera via a network;
A video output unit for performing processing for displaying video of video data acquired from the camera by the network processing unit on the display device in a predetermined display form;
A setting determining unit that determines a setting to be referred to when the camera acquires video data in accordance with a display mode selected from a plurality of display modes;
The video processing system, wherein the network processing unit notifies the camera of the setting determined by the setting determination unit. A video processing method for performing a process of displaying a video obtained from at least one camera that acquires two types of video data according to different settings on a display device,
In accordance with a display mode selected from a plurality of display modes, a setting to be referred to when the camera acquires video data is determined,
Notify the camera of the determined settings,
Receiving the video data according to the determined setting transmitted from the camera via a network;
A video processing method, comprising: performing a process of displaying the video of the received video data on the display device in a predetermined display form.

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