JP2019068252A - Control device, control method, and program - Google Patents

Abstract

To adjust setting of a transmission device without making viewers of other receiving devices feel uncomfortable.SOLUTION: When an adjustment instruction on video data being transmitted from a transmission device is received, a control device sends the transmission device information to make video data not reflecting adjustment transmitted via a first transmission path and video data reflecting the adjustment transmitted via a second transmission path, sends a receiving device used for adjustment of the video data being transmitted among a plurality of receiving devices information to display the video data received via the second transmission path, and sends receiving devices not used for adjustment of the video data being transmitted information to display the video data received via the first transmission path.SELECTED DRAWING: Figure 1

Description

  The present invention relates to transmission control of video data corresponding to a duplex transmission path.

  In recent years, with the rapid development of communication technology, it has become possible to communicate information such as voice and video data at high speed. In particular, in the case of transmitting video data in real time, it is difficult to cope with retransmission by the large volume of data and time constraints. As one of the techniques for enhancing the reliability of such transmission, there is a duplex transmission method. In duplex transmission, in preparation for unexpected deterioration of the transmission path, equivalent video data is transmitted using two transmission paths (Patent Document 1).

  On the other hand, conventionally, in a system for exchanging video data, it is known to carry out various settings of a camera which is a transmission apparatus while looking at a display which is one of receiving devices.

JP 2005-354363 A

  When such duplex transmission is applied to a transmission system using a network such as IP streaming, for example, it becomes possible to receive video transmitted from a transmission device such as a camera by a plurality of receiving devices.

  However, when one of the receiving devices adjusts the settings of the transmission device, the adjusted video will also be transmitted to the other receiving devices. For example, since many adjustments are often made while changing various parameters during adjustment, in the meantime, an image in which parameters are changed many times will be transmitted to other receiving devices, Viewers feel uncomfortable.

  The control device according to the present invention is a control device that controls a transmission device capable of transmitting video data to a plurality of receiving devices via the duplexed first transmission path and second transmission path. A receiving unit for receiving an adjustment instruction of video data being transmitted from the transmission device; and an adjustment instruction of the video data being transmitted from the transmission device is received by the reception unit via the first transmission path First transmission means for transmitting information for transmitting video data not reflecting the adjustment, and transmitting video data reflecting the adjustment through the second transmission path to the transmission device; When an adjustment instruction of video data being transmitted is received from the transmission device by the reception unit, the reception device used for adjustment of the video data being transmitted is selected among the plurality of receiving devices. To a receiving device that transmits information for displaying video data received via the second transmission path, and does not use the adjustment of the video data being transmitted, via the first transmission path. And second transmission means for transmitting information for displaying the received video data.

  According to the present invention, it is possible to adjust the setting of the transmission apparatus without making the viewer of the other reception apparatus feel uncomfortable.

System Configuration. FIG. 2 is a block diagram of a camera 10. 7 is an operation flowchart at the time of transition from the normal state to the adjustment state. The operation | movement flowchart at the time of transfering from an adjustment state to a normal state.

First Embodiment
<System configuration>
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description of embodiments suitable for carrying out the present invention with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a transmission system in the embodiment of the present invention.

  A camera 10 is an example of a transmission apparatus (transmission apparatus), and operates as a video source for transmitting data to each reception apparatus via the network 20. The camera 10 shoots the subject 1 and generates video data. Also, the camera 10 supports IP transmission, and it is possible to stream and transmit video data to a receiving apparatus using IP (Internet Protocol). The camera 10 according to the present embodiment forms a first IP transmission line and a second IP transmission line with the reception apparatus, and is connected to the network 20 in the form of duplex transmission. In duplex transmission, in principle, the same video data is transmitted to the first IP transmission line and the second IP transmission line, and one of the transmission lines can not be used.

  A display A31, which is an example of a first receiving device, is connected to the network 20 by a first IP transmission line and a second transmission line. Furthermore, a display B32, which is an example of a second receiving device, is similarly connected to the network 20.

  Further, in the system of the present embodiment, a PC 40 which is an example of a control device is also connected to the network 20. The PC 40 can change settings of the camera 10 by transmitting various control signals (command in this embodiment) to the camera 10.

<Configuration of camera>
The structure of the camera 10 is shown in FIG. An image sensor 200 receives external light from a lens (not shown) and converts image information into an electric signal. The electrical signal is converted into a digital signal by the AD converter 201. Thereafter, in the video processing unit 202, processing such as filtering and color conversion is performed. Furthermore, after compression processing is performed by the first video compression unit 207, the first network processing unit 209 divides the data into packets, adds appropriate flags and headers, and It is output at the 1 network terminal 111.

  Further, the adjustment video generation unit 203 creates a predetermined adjustment video from data of various video processing. For example, the in-focus portion is detected, a zebra mark indicating the portion is generated, and the adjustment video synthesis unit 204 performs processing such as superimposing on the original video.

  The switch 205 is a switch for selecting the input A and the input B. In a state where the input A is selected, the video data from the video processing unit 202 is sent to the second video compression unit 208 in the subsequent stage. On the other hand, in a state in which the input B is selected, the video data from the adjusted video synthesizing unit 204 is sent to the second video compression unit 208 in the subsequent stage. In the present embodiment, it is assumed that the input A is selected in the initial state of the switch 205 (at the start of transmission). The conditions under which the switch 205 switches will be described later.

  After the video data is compressed by the second video compression unit 208, the second network processing unit 210 divides the data into packets in the same manner as the above-described processing contents. Then, after an appropriate flag and header are added, the signal is output at the second network terminal 112 as second main video data to be duplex data.

  The camera 10 of the present embodiment receives a command from the PC 40 via the first network terminal 111. When a command is received, the network processing unit 209 filters the command, and then the content is transmitted to the command processing unit 206. Note that, since the present embodiment is duplex transmission, a command may be received via the second network terminal 112. In this case, the network processing unit 110 detects that it is a command and transmits it to the command processing unit 206.

  The command processing unit 206 determines the content of the transmitted command, and notifies the adjustment image generation unit 203 of the content of the adjustment. Furthermore, according to the content of the command, an instruction to switch the switch 205 is transmitted.

  The above is the configuration of the camera 10. The configuration of the camera 10 is not limited to that shown in FIG. For example, the configuration as shown in FIG. 1 does not have to be realized by preparing individual hardware. For example, one processor may function as a plurality of means by executing various programs expanded in the memory, or a plurality of hardware may function as one means in cooperation.

<Migration to adjustment state>
FIG. 3 is a flowchart showing the operation of the PC 40 in the present embodiment. Note that this flowchart is realized by the processor of the PC 40 controlling each part of the PC 40 based on the program developed in the memory or the input signal from each part. The same applies to the operation of the camera 10.

  This flowchart is started from a state in which video data is transmitted from the camera 10 to the display A31 and the display B32. As described above, since the initial state of the switch 205 is the input A, the same video data is transmitted to the IP transmission path 1 and the IP transmission path 2.

  First, an adjustment instruction from the user is received so as to carry out the adjustment operation of the video data being transmitted by the PC 40 (S300). The instruction includes information indicating that the adjustment is performed using the display A31. The PC 40 having received this instruction transmits a command instructing the display A 31 to use the IP transmission path 2 (S310). The display A 31 which has received this control command is set to display video data from the IP transmission path 2 though it inputs video data from both the IP transmission path 1 and the IP transmission path 2.

  Next, the PC 40 transmits a command instructing the display B 32 to use the IP transmission path 1 (S320). The display A 32 which has received this control command is set to display video data from the IP transmission path 1 though it inputs video data from both the IP transmission path 1 and the IP transmission path 2.

  The PC 40 waits for reception of a response of setting completion from the display A 31 and the display B 32 (S 330). In addition to the completion, the response data also includes information as to whether or not setting can be made.

  After receiving the response data, the PC 40 analyzes the information as to whether or not the setting can be made in the response data (S340). If the content of the response data is OK (OK), the process proceeds to S350.

  Subsequently, the PC 40 transmits an adjustment mode output command to the camera 10. (S350).

  The command processing unit 106 of the camera 10 that has received this command notifies the adjustment video generation unit 103 of the adjustment content indicated by the command. As a result, the adjusted video generation unit 103 generates video data reflecting the adjustment content, and the adjusted video combining unit further combines data as needed. Furthermore, the command processing unit 106 controls the switch 205 to switch to the input B. As a result, video data for adjustment is input to the video compression unit 108 from the adjustment video synthesis unit 104. That is, the camera 10 having received the adjustment mode output command continues to transmit the main video data from the IP transmission path 1 and transmits the video data for adjustment from the IP transmission path 2. The IP data obtained by packetizing video data includes an area to which a status flag is added. The camera 10 according to the present embodiment adds a flag indicating the main video data to the main video data, that is, the output data from the IP transmission line 1, and adjusts the output video data from the IP transmission path 2, that is, the adjustment video data. A flag is added to indicate that the data is The camera 10 also adds a flag indicating that both are related data to both video data. This point will be described later. When the switching is completed, the camera 10 sends response data of switching completion to the PC 40.

  In the PC 40, when the response data is received (S360), the information on the setting availability in the response data is analyzed. As a result, when it is OK (OK), the switching to the series of adjustment operations is completed, and the adjustment becomes possible. This state is called the adjustment state.

  By shifting to the adjustment state as described above, the camera 10 transmits the main video data to the IP transmission line 1 and the adjustment video data to the IP transmission line 2 (S350). Then, the display A 31 displays the video data received from the IP transmission path 2, that is, the video data for adjustment (S310). Therefore, the user of the display A31 can adjust the video while confirming the displayed video. On the other hand, the display B 32 displays the video data received from the IP transmission line 1, that is, the main video data (S320). Therefore, the user of the display B32 can confirm the main video data without being affected by the adjustment operation of the display A31.

  Now, a case will be described in which the content for which the setting is not made (NG) is returned from the display in S340 of FIG. In this case, the PC 40 transmits a command instructing both the display A 31 and the display B 32 to use video data of both the IP transmission path 1 and the IP transmission path 2 (S 380). The displays A 31 and B 32 having received this control command can generate display data using video data of both the IP transmission path 1 and the IP transmission path 2. Although the method of use depends on the specifications of the display, in general, video data is received from both transmission paths, one of the video data is displayed, and the other video data is used in the event of any abnormality. When the setting is completed on each display, a response message is sent back to the PC 40. The PC 40 that has received the response message displays on the accompanying display screen to the user that "Adjustment can not be set" (S390).

  Further, when the content for setting the setting as not (NG) is returned in response data from the camera 10 in S370 described above, the PC 40 executes S380 and S390 in the same manner as described above.

<Return from adjustment state>
Next, after the process shown in FIG. 3 is performed and the camera 10 is in the adjusted state, the operation when the adjustment is completed will be described using FIG. 4.

  First, the PC 40 receives an adjustment completion instruction from the user (S410). Then, a command for instructing to transmit the main image to the IP transmission path 1 and the IP transmission path 2 is transmitted from the PC 40 to the camera 10 (S420). This command may be a command indicating a specific control content, or may simply transmit a parameter indicating that the adjustment has been completed.

  In response to this, the switch 10 of the camera 10 switches to the input A. As a result, the main video data is transmitted from both the IP transmission path 1 and the IP transmission path 2. After the switching process by the camera 10, a response message indicating the completion of switching is sent from the camera 10 to the PC 40.

  The PC 40 receives this response message (S430), and transmits a command instructing to use the video data of both the IP transmission path 1 and the IP transmission path 2 to the display A 31 and the display B 32, respectively. This is similar to the command sent in S380. When the setting is completed on each display, a response message is sent back to the PC 40.

  The setting is completed on both displays, and the response message from both is received (S450). This processing is completed on the assumption that the normal state is restored.

  In the present embodiment, the control device and the display A used for adjustment have been described as separate devices, but since a display device for a PC may be used also for image display, these may be used as the same device. It can also be configured. In this case, S320 shown in FIG. 3 is omitted, and also for S330, the completion response is received only from the display B.

  Further, at this time, also in FIG. 3 showing the operation at the time of return, although only the display B is used in the command transmission in S440 and the response reception in S450, it can be realized by the same processing as a whole.

[Other embodiments]
Although the present invention has been described in detail based on its preferred embodiments, the present invention is not limited to these specific embodiments, and various embodiments within the scope of the present invention are also included in the present invention. included. Some of the embodiments described above may be combined as appropriate.

  For example, the function as the control device described above may be implemented as one function of the camera.

  In this embodiment, although described as a wired LAN as an IP transmission path, a mode in which a switching hub is inserted in the middle or connected by a wired LAN or a wireless LAN via a wireless router is also applicable to the present invention. included.

  Also, when a software program for realizing the functions of the above-described embodiment is supplied from a recording medium to a system or apparatus having a computer capable of executing the program directly or using wired / wireless communication, and the program is executed Is also included in the present invention.

  Therefore, the program code itself supplied and installed in the computer to realize the functional processing of the present invention by the computer also implements the present invention. That is, the computer program itself for realizing the functional processing of the present invention is also included in the present invention.

  In that case, as long as it has the function of the program, the form of the program, such as object code, a program executed by an interpreter, script data supplied to the OS, etc., does not matter.

  The recording medium for supplying the program may be, for example, a hard disk, a magnetic recording medium such as a magnetic tape, an optical / optical magnetic storage medium, or a non-volatile semiconductor memory.

  Also, as a program supply method, a method may be considered in which a computer program forming the present invention is stored in a server on a computer network, and a connected client computer downloads and programs the computer program.

Claims (8)

A control device for controlling a transmission device capable of transmitting video data to a plurality of receiving devices via a duplexed first transmission path and a second transmission path, the control device comprising:
Receiving means for receiving an adjustment instruction of video data being transmitted from the transmission device;
When an adjustment instruction of video data being transmitted from the transmission apparatus is received by the receiving unit, video data not reflecting the adjustment is transmitted through the first transmission path, and the second transmission path is transmitted. First transmission means for transmitting information for transmitting video data reflecting the adjustment via the transmission device to the transmission device;
When an adjustment instruction of video data being transmitted is received from the transmission device by the receiving unit, the second receiving device used for adjusting the video data being transmitted among the plurality of receiving devices is selected. Video data received via the first transmission path to a receiving device that transmits information for displaying the video data received via the transmission path of the above and is not used for adjusting the video data being transmitted Control device having second transmission means for transmitting information for displaying.   The first transmission unit receives the adjustment completion instruction of the video data being transmitted from the transmission apparatus by the reception unit, the first transmission unit performs the adjustment via the first transmission path and the second transmission path. The control device according to claim 1, wherein information for transmitting video data not reflecting the image is transmitted to the transmission device.   When the acceptance means receives an adjustment completion instruction of video data being transmitted from the transmission device from the transmission device, the second transmission means receives the video received via the first transmission path and the second transmission path. The control device according to claim 1 or 2, wherein information indicating that any of the data can be displayed is transmitted.   The control device according to any one of claims 1 to 3, wherein the control device is one of the plurality of receiving devices.   The said 1st transmission line and a said 2nd transmission line are transmission lines for transmitting said video data using IP transmission, The any one of the Claims 1 thru | or 4 characterized by the above-mentioned. Control device.   The control device according to any one of claims 1 to 5, wherein the adjustment of the video data includes a process of superimposing a predetermined mark on the video data. A control method for controlling a transmission apparatus capable of transmitting video data to a plurality of receiving apparatuses via a duplexed first transmission path and a second transmission path,
A receiving step of receiving an adjustment instruction of video data being transmitted from the transmission device;
In the receiving step, when an adjustment instruction of video data being transmitted from the transmission apparatus is received, video data not reflecting the adjustment is transmitted through the first transmission path, and the second transmission path is transmitted. Transmitting, to the transmission device, information for transmitting the video data reflecting the adjustment via the first transmission step;
In the receiving step, when an adjustment instruction of video data being transmitted is received from the transmission device, the second receiving device used for adjusting the video data being transmitted among the plurality of receiving devices is selected. Video data received via the first transmission path to a receiving device that transmits information for displaying the video data received via the transmission path of the above and is not used for adjusting the video data being transmitted A control control method having a second transmission step of transmitting information for displaying.   A computer-executable program that causes a computer to function as each means of the control device according to any one of claims 1 to 6.

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