Transmitting device, receiving device, control method, and communication system
A technology for sending equipment and receiving equipment, applied in the fields of control methods and communication systems, receiving equipment, and sending equipment, can solve problems such as difficulty in ensuring real-time characteristics of image data distribution, and achieve the effect of high-precision synchronization
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no. 1 example
[0082] Figure 4 is a block diagram showing a configuration example of the first embodiment of the communication system to which the present invention is applied.
[0083] exist Figure 4 In this example, the communication system 20 includes a circuit switching device 21 , three studios (studios) 22 a to 22 c , three waiting rooms (subs) 23 a to 23 c , and a delay control device 24 . For example, in the communication system 20, devices are connected to each other by a general-purpose circuit such as Ethernet (registered trademark), NGN, radio, or the like.
[0084] The circuit switching device 21 relays communication of a plurality of devices constituting the communication system 20, and is, for example, a hub in the case of Ethernet (registered trademark). In addition, a hub will be defined as a generic name for a line concentrator used in a star network, and may or may not have an SNMP (Simple Network Management Protocol) agent function. That is, the circuit switching dev...
no. 2 example
[0162] Figure 13 is a block diagram showing a configuration example of the second embodiment of the communication system to which the present invention is applied.
[0163] The foregoing description of the first embodiment assumes that the difference in the amount of delay due to the network connection from the waiting rooms 23a to 23c to the studios 22a to 22c is a negligible level. However, in practice, when the connection paths are greatly different from each other, it is necessary to achieve synchronization in consideration of the difference in delay amount. Therefore, in the second embodiment, a configuration will be described in which the connection paths between the studios 22a to 22c and the waiting rooms 23a to 23c are different from each other.
[0164] Such as Figure 13 shown, with Figure 4 Compared with the communication system 20 of the communication system 20, the circuit connection configuration (network topology in the case of Ethernet (registered tradema...
no. 3 example
[0177] will refer to Figure 16 The flowchart of is describing the delay control processing performed in the third embodiment of the communication system to which the present invention is applied. Additionally, this processing is done in conjunction with Figure 4 The communication system 20 in a similar configuration is performed.
[0178] For example, this process starts when the communication system 20 is started. In step S41, the delay control device 24 sets a combination as a pair that measures delay times in the cameras 31a-1 to 31c-3 and the CCUs 33a to 33c. Specifically, the delay control device 24 determines the combination of the camera 31 and the CCU 33 as a pair, and notifies the CCU 33 to measure the delay time between the CCU 33 and the camera 31 set as a pair. At this time, for example, the delay control device 24 sets a tentative main timing (which is an arbitrary timing other than the synchronization timing of the CCUs 33a to 33c), and executes processing. ...
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