CN110475160B - Method and device for transmitting video data across video network - Google Patents
Method and device for transmitting video data across video network Download PDFInfo
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- CN110475160B CN110475160B CN201810445071.0A CN201810445071A CN110475160B CN 110475160 B CN110475160 B CN 110475160B CN 201810445071 A CN201810445071 A CN 201810445071A CN 110475160 B CN110475160 B CN 110475160B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/146—Markers for unambiguous identification of a particular session, e.g. session cookie or URL-encoding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64707—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless for transferring content from a first network to a second network, e.g. between IP and wireless
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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Abstract
The embodiment of the invention provides a method and a device for transmitting video data across a video network, wherein the method comprises the following steps: acquiring a video data request, transmitting video data from a first video network terminal to a first video network virtual terminal through a first video network, transmitting video data from the first video network virtual terminal to a second video network virtual terminal through a communication cable, transmitting video data from the second video network virtual terminal to the second video network terminal through the second video network, communicating video network servers in different video networks by adopting the communication cable, and configuring the video network virtual terminals on the video network servers in each video network, the video data is forwarded through the virtual terminals of the video network, so that the original transmission mode between the terminals can be adopted in each video network without modifying each video network, the data transmission of the cross-video networking can be realized, and then the technical problem that the cross-video networking cannot carry out services such as monitoring scheduling, video telephone, video conference, video live broadcast and the like is solved.
Description
Technical Field
The invention relates to the technical field of video networking, in particular to a method and a device for transmitting video data across video networking.
Background
With the rapid development of network technologies, video networking technologies are increasingly applied in various technical fields. The video network adopts a real-time high-definition video exchange technology, and realizes high-definition quality video playing through a television or a computer.
The video network can realize the services of video telephone, video conference, live broadcast, video monitoring and the like, and the technology of mutually transmitting video data among video network terminals in one video network can meet the services.
However, two or more independent video networks are isolated from each other, that is, there is no communication cable to communicate with each other, and due to the problems of different communication protocols adopted between heterogeneous video networks, different software versions of terminals, full address resources, and the like, cross-video-network data transmission between video-network terminals cannot be realized, and thus the technical problem that the cross-video-network cannot monitor and schedule services such as video telephone, video conference, video live broadcast, and the like is caused.
Disclosure of Invention
In view of the above problems, embodiments of the present invention are proposed to provide a method for transmitting video data across a video network and a corresponding apparatus for transmitting video data across a video network that overcome or at least partially solve the above problems.
According to an aspect of the present invention, there is provided a method for transmitting video data across video networks, the method being applied to a plurality of heterogeneous video networks, wherein a plurality of video network terminals exist in each of the plurality of video networks, and video network servers deployed in each of the plurality of video networks are connected by a communication cable, the method including:
acquiring a video data request, wherein the video data request is initiated by a first video network terminal in a first video network aiming at a second video network terminal in a second video network;
transmitting video data from the first video network terminal to a first video network virtual terminal via the first video network, the first video network virtual terminal being configured on a first video network server in the first video network;
transmitting the video data from the first video network virtual terminal to a second video network virtual terminal via the communication cable, the second video network virtual terminal being configured on a second video network server in the second video network;
and transmitting the video data from the second video network virtual terminal to the second video network terminal through the second video network.
Optionally, before the transmitting the video data from the first video network terminal to the first video network virtual terminal via the first video network, the method further comprises:
respectively searching available video network terminal identifications in the first video network and the second video network;
and determining the first video networking virtual terminal and the second video networking virtual terminal according to the available video networking terminal identification.
Optionally, the method further comprises:
according to the video data request, the first video networking virtual terminal requests video data from the second video networking virtual terminal;
and the second video network virtual terminal requests video data from the second video network terminal.
Optionally, before the transmitting the video data from the first video network terminal to the first video network virtual terminal via the first video network, the method further comprises:
and determining the second video network according to the video network terminal identification carried by the video data request, wherein the video network terminal identification comprises a video network identification.
Optionally, the method further comprises:
transmitting video data from the second video network terminal to the second video network virtual terminal through the second video network;
transmitting video data from the second video-networking virtual terminal to the first video-networking virtual terminal via the communication cable;
and transmitting the video data from the first video network virtual terminal to the first video network terminal through the first video network.
According to another aspect of the present invention, there is provided an apparatus for transmitting video data across video networks, the method being applied to a plurality of heterogeneous video networks, wherein a plurality of video network terminals exist in each of the plurality of video networks, and video network servers deployed in each of the plurality of video networks are connected by a communication cable, the apparatus comprising:
the request acquisition module is used for acquiring a video data request, wherein the video data request is initiated by a first video network terminal in a first video network aiming at a second video network terminal in a second video network;
the first transmission module is used for transmitting video data from the first video network terminal to a first video network virtual terminal through the first video network, and the first video network virtual terminal is configured on a first video network server in the first video network;
the second transmission module is used for transmitting the video data from the first video network virtual terminal to a second video network virtual terminal through the communication cable, and the second video network virtual terminal is configured on a second video network server in the second video network;
and the third transmission module is used for transmitting the video data from the second video network virtual terminal to the second video network terminal through the second video network.
Optionally, the apparatus further comprises:
the identification searching module is used for respectively searching the available video network terminal identifications in the first video network and the second video network before the video data are transmitted from the first video network terminal to the first video network virtual terminal through the first video network;
and the virtual terminal determining module is used for determining the first video network virtual terminal and the second video network virtual terminal according to the available video network terminal identification.
Optionally, the apparatus further comprises:
the data request module is used for requesting video data from the second video networking virtual terminal by the first video networking virtual terminal according to the video data request;
and the second video network virtual terminal requests video data from the second video network terminal.
Optionally, the apparatus further comprises:
and the video networking determining module is used for determining the second video networking according to the video networking terminal identification carried by the video data request before the video data is transmitted from the first video networking terminal to the first video networking virtual terminal through the first video networking, wherein the video networking terminal identification comprises a video networking identification.
Optionally, the apparatus further comprises:
the fourth transmission module is used for transmitting the video data from the second video network terminal to the second video network virtual terminal through the second video network;
the fifth transmission module is used for transmitting the video data from the second video networking virtual terminal to the first video networking virtual terminal through the communication cable;
and the sixth transmission module is used for transmitting the video data from the first video network virtual terminal to the first video network terminal through the first video network.
The embodiment of the invention has the following advantages:
in the embodiment of the invention, by acquiring a video data request, video data is transmitted from a first video network terminal to a first video network virtual terminal through a first video network, the video data is transmitted from the first video network virtual terminal to a second video network virtual terminal through a communication cable, the video data is transmitted from the second video network virtual terminal to the second video network terminal through a second video network, the video network servers in different video networks are communicated through the communication cable, the video network virtual terminals are configured on the video network servers in the video networks, and the video data is forwarded through the video network virtual terminals, so that the original inter-terminal transmission mode can be adopted in each video network, the video data transmission of the cross-video network can be realized without transforming each video network, and the problem that the cross-video network cannot be monitored, scheduled and dispatched is solved, The technical problems of the services such as video telephone, video conference, video live broadcast and the like.
Drawings
FIG. 1 is a networking diagram of a video network, according to one embodiment of the invention;
FIG. 2 is a diagram illustrating a hardware architecture of a node server according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a hardware structure of an access switch according to an embodiment of the present invention;
fig. 4 is a schematic hardware structure diagram of an ethernet protocol conversion gateway according to an embodiment of the present invention;
FIG. 5 is a flow chart of the steps of a method of transmitting video data across a video network, in accordance with one embodiment of the present invention;
FIG. 6 is a schematic diagram of a transmission path between two video network terminals across a video network;
FIG. 7 is a flow chart of steps in a method of transmitting video data across a video network according to another embodiment of the invention;
FIG. 8 is a schematic diagram of a process for transmitting video data across a video network;
fig. 9 is a block diagram of an apparatus for transmitting video data across a video network according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
To better understand the embodiments of the present invention, the following description refers to the internet of view:
the video networking is an important milestone for network development, is a real-time network, can realize high-definition video real-time transmission, and pushes a plurality of internet applications to high-definition video, and high-definition faces each other.
The video networking adopts a real-time high-definition video exchange technology, can integrate required services such as dozens of services of video, voice, pictures, characters, communication, data and the like on a system platform on a network platform, such as high-definition video conference, video monitoring, intelligent monitoring analysis, emergency command, digital broadcast television, delayed television, network teaching, live broadcast, VOD on demand, television mail, Personal Video Recorder (PVR), intranet (self-office) channels, intelligent video broadcast control, information distribution and the like, and realizes high-definition quality video broadcast through a television or a computer.
Some of the technologies applied in the video networking are as follows:
network Technology (Network Technology)
Network technology innovation in video networking has improved over traditional Ethernet (Ethernet) to face the potentially enormous video traffic on the network. Unlike pure network Packet Switching (Packet Switching) or network Circuit Switching (Circuit Switching), the Packet Switching is adopted by the technology of the video networking to meet the Streaming requirement. The video networking technology has the advantages of flexibility, simplicity and low price of packet switching, and simultaneously has the quality and safety guarantee of circuit switching, thereby realizing the seamless connection of the whole network switching type virtual circuit and the data format.
Switching Technology (Switching Technology)
The video network adopts two advantages of asynchronism and packet switching of the Ethernet, eliminates the defects of the Ethernet on the premise of full compatibility, has end-to-end seamless connection of the whole network, is directly communicated with a user terminal, and directly bears an IP data packet. The user data does not require any format conversion across the entire network. The video networking is a higher-level form of the Ethernet, is a real-time exchange platform, can realize the real-time transmission of the whole-network large-scale high-definition video which cannot be realized by the existing Internet, and pushes a plurality of network video applications to high-definition and unification.
Server Technology (Server Technology)
The server technology on the video networking and unified video platform is different from the traditional server, the streaming media transmission of the video networking and unified video platform is established on the basis of connection orientation, the data processing capacity of the video networking and unified video platform is independent of flow and communication time, and a single network layer can contain signaling and data transmission. For voice and video services, the complexity of video networking and unified video platform streaming media processing is much simpler than that of data processing, and the efficiency is greatly improved by more than one hundred times compared with that of a traditional server.
Storage Technology (Storage Technology)
The super-high speed storage technology of the unified video platform adopts the most advanced real-time operating system in order to adapt to the media content with super-large capacity and super-large flow, the program information in the server instruction is mapped to the specific hard disk space, the media content is not passed through the server any more, and is directly sent to the user terminal instantly, and the general waiting time of the user is less than 0.2 second. The optimized sector distribution greatly reduces the mechanical motion of the magnetic head track seeking of the hard disk, the resource consumption only accounts for 20% of that of the IP internet of the same grade, but concurrent flow which is 3 times larger than that of the traditional hard disk array is generated, and the comprehensive efficiency is improved by more than 10 times.
Network Security Technology (Network Security Technology)
The structural design of the video network completely eliminates the network security problem troubling the internet structurally by the modes of independent service permission control each time, complete isolation of equipment and user data and the like, generally does not need antivirus programs and firewalls, avoids the attack of hackers and viruses, and provides a structural carefree security network for users.
Service Innovation Technology (Service Innovation Technology)
The unified video platform integrates services and transmission, and is not only automatically connected once whether a single user, a private network user or a network aggregate. The user terminal, the set-top box or the PC are directly connected to the unified video platform to obtain various multimedia video services in various forms. The unified video platform adopts a menu type configuration table mode to replace the traditional complex application programming, can realize complex application by using very few codes, and realizes infinite new service innovation.
Networking of the video network is as follows:
the video network is a centralized control network structure, and the network can be a tree network, a star network, a ring network and the like, but on the basis of the centralized control node, the whole network is controlled by the centralized control node in the network.
As shown in fig. 1, the video network is divided into an access network and a metropolitan network.
The devices of the access network part can be mainly classified into 3 types: node server, access switch, terminal (including various set-top boxes, coding boards, memories, etc.). The node server is connected to an access switch, which may be connected to a plurality of terminals and may be connected to an ethernet network.
The node server is a node which plays a centralized control function in the access network and can control the access switch and the terminal. The node server can be directly connected with the access switch or directly connected with the terminal.
Similarly, devices of the metropolitan network portion may also be classified into 3 types: a metropolitan area server, a node switch and a node server. The metro server is connected to a node switch, which may be connected to a plurality of node servers.
The node server is a node server of the access network part, namely the node server belongs to both the access network part and the metropolitan area network part.
The metropolitan area server is a node which plays a centralized control function in the metropolitan area network and can control a node switch and a node server. The metropolitan area server can be directly connected with the node switch or directly connected with the node server.
Therefore, the whole video network is a network structure with layered centralized control, and the network controlled by the node server and the metropolitan area server can be in various structures such as tree, star and ring.
The access network part can form a unified video platform (the part in the dotted circle), and a plurality of unified video platforms can form a video network; each unified video platform may be interconnected via metropolitan area and wide area video networking.
Video networking device classification
1.1 devices in the video network of the embodiment of the present invention can be mainly classified into 3 types: servers, switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.). The video network as a whole can be divided into a metropolitan area network (or national network, global network, etc.) and an access network.
1.2 wherein the devices of the access network part can be mainly classified into 3 types: node servers, access switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.).
The specific hardware structure of each access network device is as follows:
a node server:
as shown in fig. 2, the system mainly includes a network interface module 201, a switching engine module 202, a CPU module 203, and a disk array module 204;
the network interface module 201, the CPU module 203, and the disk array module 204 all enter the switching engine module 202; the switching engine module 202 performs an operation of looking up the address table 205 on the incoming packet, thereby obtaining the direction information of the packet; and stores the packet in a queue of the corresponding packet buffer 206 based on the packet's steering information; if the queue of the packet buffer 206 is nearly full, it is discarded; the switching engine module 202 polls all packet buffer queues for forwarding if the following conditions are met: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero. The disk array module 204 mainly implements control over the hard disk, including initialization, read-write, and other operations on the hard disk; the CPU module 203 is mainly responsible for protocol processing with an access switch and a terminal (not shown in the figure), configuring an address table 205 (including a downlink protocol packet address table, an uplink protocol packet address table, and a data packet address table), and configuring the disk array module 204.
The access switch:
as shown in fig. 3, the network interface module mainly includes a network interface module (a downlink network interface module 301 and an uplink network interface module 302), a switching engine module 303 and a CPU module 304;
wherein, the packet (uplink data) coming from the downlink network interface module 301 enters the packet detection module 305; the packet detection module 305 detects whether the Destination Address (DA), the Source Address (SA), the packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id) and enters the switching engine module 303, otherwise, discards the stream identifier; the packet (downstream data) coming from the upstream network interface module 302 enters the switching engine module 303; the data packet coming from the CPU module 204 enters the switching engine module 303; the switching engine module 303 performs an operation of looking up the address table 306 on the incoming packet, thereby obtaining the direction information of the packet; if the packet entering the switching engine module 303 is from the downstream network interface to the upstream network interface, the packet is stored in the queue of the corresponding packet buffer 307 in association with the stream-id; if the queue of the packet buffer 307 is nearly full, it is discarded; if the packet entering the switching engine module 303 is not from the downlink network interface to the uplink network interface, the data packet is stored in the queue of the corresponding packet buffer 307 according to the guiding information of the packet; if the queue of the packet buffer 307 is nearly full, it is discarded.
The switching engine module 303 polls all packet buffer queues, which in this embodiment of the present invention is divided into two cases:
if the queue is from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queued packet counter is greater than zero; 3) obtaining a token generated by a code rate control module;
if the queue is not from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero.
The rate control module 208 is configured by the CPU module 204, and generates tokens for packet buffer queues from all downstream network interfaces to upstream network interfaces at programmable intervals to control the rate of upstream forwarding.
The CPU module 304 is mainly responsible for protocol processing with the node server, configuration of the address table 306, and configuration of the code rate control module 308.
Ethernet protocol conversion gateway：
As shown in fig. 4, the apparatus mainly includes a network interface module (a downlink network interface module 401 and an uplink network interface module 402), a switching engine module 403, a CPU module 404, a packet detection module 405, a rate control module 408, an address table 406, a packet buffer 407, a MAC adding module 409, and a MAC deleting module 410.
Wherein, the data packet coming from the downlink network interface module 401 enters the packet detection module 405; the packet detection module 405 detects whether the ethernet MAC DA, the ethernet MAC SA, the ethernet length or frame type, the video network destination address DA, the video network source address SA, the video network packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id); then, the MAC deletion module 410 subtracts MAC DA, MAC SA, length or frame type (2byte) and enters the corresponding receiving buffer, otherwise, discards it;
the downlink network interface module 401 detects the sending buffer of the port, and if there is a packet, obtains the ethernet MAC DA of the corresponding terminal according to the destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MAC SA of the ethernet protocol gateway, and the ethernet length or frame type, and sends the packet.
The other modules in the ethernet protocol gateway function similarly to the access switch.
A terminal:
the system mainly comprises a network interface module, a service processing module and a CPU module; for example, the set-top box mainly comprises a network interface module, a video and audio coding and decoding engine module and a CPU module; the coding board mainly comprises a network interface module, a video and audio coding engine module and a CPU module; the memory mainly comprises a network interface module, a CPU module and a disk array module.
1.3 devices of the metropolitan area network part can be mainly classified into 2 types: node server, node exchanger, metropolitan area server. The node switch mainly comprises a network interface module, a switching engine module and a CPU module; the metropolitan area server mainly comprises a network interface module, a switching engine module and a CPU module.
2. Video networking packet definition
2.1 Access network packet definition
The data packet of the access network mainly comprises the following parts: destination Address (DA), Source Address (SA), reserved bytes, payload (pdu), CRC.
As shown in the following table, the data packet of the access network mainly includes the following parts:
| DA | SA | Reserved | Payload | CRC |
wherein:
the Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (such as various protocol packets, multicast data packets, unicast data packets, etc.), there are 256 possibilities at most, the second byte to the sixth byte are metropolitan area network addresses, and the seventh byte and the eighth byte are access network addresses;
the Source Address (SA) is also composed of 8 bytes (byte), defined as the same as the Destination Address (DA);
the reserved byte consists of 2 bytes;
the payload part has different lengths according to different types of datagrams, and is 64 bytes if the datagram is various types of protocol packets, and is 32+1024 or 1056 bytes if the datagram is a unicast packet, of course, the length is not limited to the above 2 types;
the CRC consists of 4 bytes and is calculated in accordance with the standard ethernet CRC algorithm.
2.2 metropolitan area network packet definition
The topology of a metropolitan area network is a graph and there may be 2, or even more than 2, connections between two devices, i.e., there may be more than 2 connections between a node switch and a node server, a node switch and a node switch, and a node switch and a node server. However, the metro network address of the metro network device is unique, and in order to accurately describe the connection relationship between the metro network devices, parameters are introduced in the embodiment of the present invention: a label to uniquely describe a metropolitan area network device.
In this specification, the definition of the Label is similar to that of the Label of MPLS (Multi-Protocol Label Switch), and assuming that there are two connections between the device a and the device B, there are 2 labels for the packet from the device a to the device B, and 2 labels for the packet from the device B to the device a. The label is classified into an incoming label and an outgoing label, and assuming that the label (incoming label) of the packet entering the device a is 0x0000, the label (outgoing label) of the packet leaving the device a may become 0x 0001. The network access process of the metro network is a network access process under centralized control, that is, address allocation and label allocation of the metro network are both dominated by the metro server, and the node switch and the node server are both passively executed, which is different from label allocation of MPLS, and label allocation of MPLS is a result of mutual negotiation between the switch and the server.
As shown in the following table, the data packet of the metro network mainly includes the following parts:
| DA | SA | Reserved | label (R) | Payload | CRC |
Namely Destination Address (DA), Source Address (SA), Reserved byte (Reserved), tag, payload (pdu), CRC. The format of the tag may be defined by reference to the following: the tag is 32 bits with the upper 16 bits reserved and only the lower 16 bits used, and its position is between the reserved bytes and payload of the packet.
Based on the above characteristics of the video network, one of the core concepts of the embodiments of the present invention is proposed, and the function of transmitting video data across the video network is realized in compliance with the protocol of the video network.
Referring to fig. 5, a flow chart of steps of a method for transmitting video data across a video network is shown, which may be applied in a video network, according to an embodiment of the present invention:
the plurality of video networks are originally isolated from each other, namely, no communication cables are communicated with each other. And multiple video networks are heterogeneous, may run on different protocols, may support different functions or applications, may have different software versions of terminals, and may have full address resources, so that cross-video-network data transmission between video-network terminals cannot be realized.
A plurality of video network terminals are respectively arranged in a plurality of video networks, and video data can be transmitted among the video network terminals (comprising various set top boxes, coding boards, memories and the like) in the same video network, so that services such as monitoring, video telephone, video conference, live broadcasting and the like are realized.
In the embodiment of the invention, in order to solve the problem of video data transmission across video networks, video network servers are respectively deployed in a plurality of video networks, and the video network servers can transmit video data with video network terminals in the video network through the video networks. And communication cables are adopted to communicate with the video network servers in different video networks.
When video data is transmitted across the video network, the method specifically comprises the following steps:
In the embodiment of the invention, the first video network and the second video network are two video networks, the first video network terminal is one terminal in the first video network, and the second video network terminal is one terminal in the second video network. The first video network terminal initiates a video data request for the second video network terminal, which may specifically include a request for monitored video data, a request for video data of a video conference, a request for live video data, a request for video data of a video telephone, or any other suitable video data request, and this is not limited in the embodiment of the present invention.
In this embodiment of the present invention, the first video network server is deployed in the first video network, the second video network server is deployed in the second video network, and the first video network and the second video network may also be deployed with multiple servers, which is not limited in this embodiment of the present invention.
In the embodiment of the invention, the first video networking virtual terminal is configured on the first video networking server, and as the first video networking virtual terminal is a video networking terminal simulated on the server, the transmission process of transmitting the video data from the first video networking terminal to the first video networking virtual terminal through the first video networking can be realized by utilizing the protocol and application of transmitting the video data between the original video networking terminal and the video networking terminal in the video networking, and the first video networking is not required to be modified.
Correspondingly, a second video network virtual terminal is configured on the second video network server, and because the second video network virtual terminal is a video network terminal simulated on the server, the transmission process of transmitting the video data from the second video network virtual terminal to the second video network terminal through the second video network can be realized by utilizing the protocol and application of transmitting the video data between the original video network terminal and the video network terminal in the video network, and the second video network is not required to be modified.
In this embodiment of the present invention, optionally, before transmitting the video data from the first video network terminal to the first video network virtual terminal via the first video network, the method may further include: and determining the second video network according to the video network terminal identification carried by the video data request, wherein the video network terminal identification comprises a video network identification.
The terminal identifier of the video network is used for identifying a terminal in the video network, for example, an identification number allocated to each terminal of the video network may be dynamic or static, and this is not limited in this embodiment of the present application. The terminal identifier of the internet of vision may include an identifier of the internet of vision, that is, a part of symbols in the terminal identifier of the internet of vision are used to identify the internet of vision to which the terminal belongs, for example, the identifier of the internet of vision in beijing is 11, the identifier of the internet of vision in xinjiang is 65, the first two bits of the terminal identifier of the internet of vision in beijing are 11, and the first two bits of the terminal identifier of the internet of vision in xinjiang are 65.
The video data request carries a video network terminal identification, a second video network can be determined according to the video network identification in the video network terminal identification, and then the first video network server can search a corresponding server in the second video network.
Of course, if only two video networks need to perform video data transmission across the video networks, the second video network does not need to be determined according to the video network identifier, or the second video network may be determined in any suitable manner, which is not limited in the embodiment of the present invention.
In the embodiment of the present invention, the video data request is for a second video network terminal in a second video network, and therefore the video data request is processed by the first video network server, specifically, the first video network virtual terminal.
In the embodiment of the invention, if a first video network server has a free video network virtual terminal, a free video network virtual terminal is directly allocated to process the video data request, the connection with a second video network virtual terminal is established according to the video data request, the video data request is forwarded to the second video network virtual terminal, the second video network virtual terminal finds the second video network terminal according to the video data request, and the connection between the second video network virtual terminal and the second video network terminal is established. And if the first video network server does not have a free video network virtual terminal, returning an error or retrying.
In the embodiment of the invention, the video data is transmitted from the first video network terminal to the first video network virtual terminal through the first video network, and a data transmission mode among terminals in the video network is adopted.
In the embodiment of the invention, after the first video network virtual terminal receives the video data, the video data is transmitted to the second video network virtual terminal through the communication cable.
In the embodiment of the invention, after the second video network virtual terminal receives the video data, the video data is transmitted to the second video network terminal through the second video network, and a data transmission mode among terminals in the video network is also adopted.
For example, as shown in fig. 6, a schematic diagram of a transmission path between two terminals of the video network across the video network, originally, the video network in beijing (i.e., the first video network) and the video network in xinjiang (i.e., the second video network) are isolated, the beijing terminal (i.e., the first video network terminal) may transmit video data with a bridge server (a first video network server) in the first video network, and the bridge server is configured with a first video network virtual terminal, so that data transmission between the two terminals belongs to the video network. First video networking server can communicate through the communication cable with the bridging server (being the second video networking server) in the second video networking, after first video networking server received video data, can send video data for second video networking server again, and in turn after second video networking server received video data, also can send video data for first video networking server. The second video network server can transmit video data with the Xinjiang terminal (namely, the second video network terminal) in the second video network, and the second video network server is provided with a second video network virtual terminal, so that the second video network server and the Xinjiang terminal belong to data transmission between terminals in the video network.
In this embodiment of the present invention, optionally, the method further includes:
substep S1, transmitting video data from the second video network terminal to the second video network virtual terminal via the second video network;
substep S2, transmitting video data from the second video network virtual terminal to the first video network virtual terminal via the communication cable;
substep S3, transmitting video data from the first video network virtual terminal to the first video network terminal via the first video network.
If the video data request is not unidirectional, but bidirectional, for example, the video data of both calling parties in a video conference and a video telephone are required to be sent to the other party, after the request of the first video network terminal is responded by the second video network terminal, not only the video data of the first video network terminal can be transmitted to the second video network terminal, but also the video data can be transmitted to the second video network virtual terminal from the second video network terminal through the second video network, then the video data is transmitted to the first video network virtual terminal from the second video network virtual terminal through the communication cable, and then the video data is transmitted to the first video network terminal from the first video network virtual terminal through the first video network.
In the embodiment of the invention, by acquiring a video data request, video data is transmitted from a first video network terminal to a first video network virtual terminal through a first video network, the video data is transmitted from the first video network virtual terminal to a second video network virtual terminal through a communication cable, the video data is transmitted from the second video network virtual terminal to the second video network terminal through a second video network, the video network servers in different video networks are communicated through the communication cable, the video network virtual terminals are configured on the video network servers in the video networks, and the video data is forwarded through the video network virtual terminals, so that the original inter-terminal transmission mode can be adopted in each video network, the video data transmission of the cross-video network can be realized without transforming each video network, and the problem that the cross-video network cannot be monitored, scheduled and dispatched is solved, The technical problems of the services such as video telephone, video conference, video live broadcast and the like.
Referring to fig. 7, a flowchart illustrating steps of a method for transmitting video data across a video network according to another embodiment of the present invention is shown, where the method may be applied to the video network, and specifically may include the following steps:
In the embodiment of the invention, before video data transmission, whether the first video network and the second video network have available video network terminal identifications needs to be searched, if not, the subsequent steps cannot be continued, and failure or retry and the like can be returned. If an available terminal identification of the video network is found, the process may continue to step 603.
During specific implementation, whether an available video networking terminal identifier exists in a first video networking can be searched first, if the available video networking terminal identifier does not exist, failure information is returned to the first video networking terminal, if the available video networking terminal identifier exists, the available video networking terminal identifier is returned to a management platform, after the management platform receives the available video networking terminal identifier, a video data request is sent to a first video networking server, then the first video networking server searches a second video networking server to send the request, the second video networking server searches whether the available video networking terminal identifier exists in a second video networking, if the available video networking terminal identifier does not exist, the failure information is returned to the first video networking server, and if the available video networking terminal identifier exists, the second video networking server sends the video data request to the second video networking terminal.
In the embodiment of the invention, if the first video network and the second video network both have available video network terminal identifications, the available video network terminal identification in the first video network is allocated to the first video network virtual terminal, the available video network terminal identification in the second video network is allocated to the second video network virtual terminal, so that the video transmission service between the first video network terminal and the first video network virtual terminal is established according to the video network terminal of the first video network virtual terminal, and the video transmission service between the second video network terminal and the second video network virtual terminal is established according to the video network terminal of the second video network virtual terminal.
In this embodiment of the present invention, optionally, the method further includes:
substep S4, requesting, by the first video network virtual terminal, video data from the second video network virtual terminal according to the video data request;
and a substep S5, the second video network virtual terminal requesting video data from the second video network terminal.
Before video data transmission, according to a video data request, the request is known to be from a first video network terminal in a first video network to a second video network terminal in a second video network, so that the first video network virtual terminal requests video data from the second video network virtual terminal, and after the video data is successfully transmitted, the second video network virtual terminal requests the second video network terminal for the video data.
And step 604, transmitting the video data from the first video network terminal to a first video network virtual terminal through the first video network.
See, for example, the schematic diagram of the process of transmitting video data across a video network shown in fig. 8.
One video network terminal (namely, the first video network terminal) runs a video service, the video service carries out message extension transmission through the video network (namely, the first video network), and a main message number and a terminal number are sent to a bridging server (namely, the first video network server) in the first video network.
The first video network server searches for the idle video network number (namely the video network terminal identification) in the video network, if the idle number does not exist, the first video network server returns a message of failing to request to the first video network terminal through the video network message extension and transmission, and the message of the idle number in the video network cannot be found.
And if the idle number exists, the idle video networking number is extended to the first video networking terminal through the video networking message to serve as the virtual terminal number, the first video networking terminal requests the video service from the virtual terminal number, and the idle video networking number is extended to the first video networking virtual terminal deployed on the first video networking server through the video networking message.
The first video network virtual terminal sends a request to the second video network server to request to search whether another video network (namely the second video network) has an idle video network number, if the other video network does not have the idle video network number, the request is transmitted to the first video network terminal through the first video network message topology, and the message of the idle video network number in the second video network cannot be found.
If so, the virtual terminal number requests viewing of the monitoring (i.e., video service). And if the processing is unsuccessful, an error message is extended to the second video network server through the second video network message, then the error message is transmitted to the first video network server, and then the first video network message is extended to the first video network terminal, and the first video network terminal receives a message requesting the failure of the service.
If the processing is successful, returning a success message, expanding and transmitting the success message to a second video network server through the second video network message, transmitting the success message to a first video network server, performing bridging processing on the first video network server and the second video network server, expanding and transmitting the success message to a first video network terminal through the first video network message, performing video service, namely starting to transmit audio and video streams of video data.
In the embodiment of the invention, by acquiring a video data request, available video network terminal identifications in a first video network and a second video network are respectively searched, the first video network virtual terminal and the second video network virtual terminal are determined according to the available video network terminal identifications, video data are transmitted from the first video network terminal to the first video network virtual terminal through the first video network, the video data are transmitted from the first video network virtual terminal to the second video network virtual terminal through a communication cable, the video data are transmitted from the second video network virtual terminal to the second video network terminal through the second video network, video network servers in different video networks are communicated by adopting the communication cable, the video network virtual terminals are configured on the video network servers in each video network, and the video data are forwarded through the video network virtual terminals, the method and the device have the advantages that the original transmission mode between the terminals can be adopted in each video network, each video network is not required to be modified, video data transmission of the cross video network can be achieved, and then the technical problem that the cross video network cannot monitor and schedule services such as video telephones, video conferences and live video broadcasts is solved.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 9, a block diagram of an apparatus for transmitting video data across video networks according to an embodiment of the present invention is shown, where the method is applied to multiple heterogeneous video networks, where multiple video network terminals exist in the multiple video networks, respectively, and video network servers deployed in the multiple video networks are connected by communication cables, and the apparatus includes:
a request obtaining module 701, configured to obtain a video data request, where the video data request is initiated by a first video network terminal in a first video network for a second video network terminal in a second video network;
a first transmission module 702, configured to transmit video data from the first video network terminal to a first video network virtual terminal via the first video network, where the first video network virtual terminal is configured on a first video network server in the first video network;
a second transmission module 703, configured to transmit the video data from the first video network virtual terminal to a second video network virtual terminal via the communication cable, where the second video network virtual terminal is configured on a second video network server in the second video network;
a third transmission module 704, configured to transmit the video data from the second video network virtual terminal to the second video network terminal through the second video network.
In this embodiment of the present invention, optionally, the apparatus further includes:
the identification searching module is used for respectively searching the available video network terminal identifications in the first video network and the second video network before the video data are transmitted from the first video network terminal to the first video network virtual terminal through the first video network;
and the virtual terminal determining module is used for determining the first video network virtual terminal and the second video network virtual terminal according to the available video network terminal identification.
In this embodiment of the present invention, optionally, the apparatus further includes:
the data request module is used for requesting video data from the second video networking virtual terminal by the first video networking virtual terminal according to the video data request;
and the second video network virtual terminal requests video data from the second video network terminal.
In this embodiment of the present invention, optionally, the apparatus further includes:
and the video networking determining module is used for determining the second video networking according to the video networking terminal identification carried by the video data request before the video data is transmitted from the first video networking terminal to the first video networking virtual terminal through the first video networking, wherein the video networking terminal identification comprises a video networking identification.
In this embodiment of the present invention, optionally, the apparatus further includes:
the fourth transmission module is used for transmitting the video data from the second video network terminal to the second video network virtual terminal through the second video network;
the fifth transmission module is used for transmitting the video data from the second video networking virtual terminal to the first video networking virtual terminal through the communication cable;
and the sixth transmission module is used for transmitting the video data from the first video network virtual terminal to the first video network terminal through the first video network.
In the embodiment of the invention, by acquiring a video data request, video data is transmitted from a first video network terminal to a first video network virtual terminal through a first video network, the video data is transmitted from the first video network virtual terminal to a second video network virtual terminal through a communication cable, the video data is transmitted from the second video network virtual terminal to the second video network terminal through a second video network, the video network servers in different video networks are communicated through the communication cable, the video network virtual terminals are configured on the video network servers in the video networks, and the video data is forwarded through the video network virtual terminals, so that the original inter-terminal transmission mode can be adopted in each video network, the video data transmission of the cross-video network can be realized without transforming each video network, and the problem that the cross-video network cannot be monitored, scheduled and dispatched is solved, The technical problems of the services such as video telephone, video conference, video live broadcast and the like.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The present invention provides a method and a device for transmitting video data across video networks, which are introduced in detail, and the present invention applies specific examples to explain the principle and the implementation of the present invention, and the description of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method for transmitting video data across video networks is applied to a plurality of heterogeneous video networks, a plurality of video network terminals exist in the plurality of video networks respectively, video network servers deployed in the plurality of video networks respectively are communicated by adopting communication cables, and the method comprises the following steps:
acquiring a video data request, wherein the video data request is initiated by a first video network terminal in a first video network aiming at a second video network terminal in a second video network;
transmitting video data from the first video network terminal to a first video network virtual terminal via the first video network, the first video network virtual terminal being configured on a first video network server in the first video network;
transmitting the video data from the first video network virtual terminal to a second video network virtual terminal via the communication cable, the second video network virtual terminal being configured on a second video network server in the second video network;
and transmitting the video data from the second video network virtual terminal to the second video network terminal through the second video network.
2. The method of claim 1, wherein prior to said transmitting video data from said first video network terminal to a first video network virtual terminal via said first video network, the method further comprises:
respectively searching available video network terminal identifications in the first video network and the second video network;
and determining the first video networking virtual terminal and the second video networking virtual terminal according to the available video networking terminal identification.
3. The method of claim 2, further comprising:
according to the video data request, the first video networking virtual terminal requests video data from the second video networking virtual terminal;
and the second video network virtual terminal requests video data from the second video network terminal.
4. The method of claim 1, wherein prior to said transmitting video data from said first video network terminal to a first video network virtual terminal via said first video network, the method further comprises:
and determining the second video network according to the video network terminal identification carried by the video data request, wherein the video network terminal identification comprises a video network identification.
5. The method of claim 1, further comprising:
transmitting video data from the second video network terminal to the second video network virtual terminal through the second video network;
transmitting video data from the second video-networking virtual terminal to the first video-networking virtual terminal via the communication cable;
and transmitting the video data from the first video network virtual terminal to the first video network terminal through the first video network.
6. An apparatus for transmitting video data across video networks, wherein the apparatus is applied to a plurality of heterogeneous video networks, a plurality of video network terminals exist in the plurality of video networks respectively, and video network servers deployed in the plurality of video networks respectively communicate with each other by using communication cables, the apparatus comprising:
the request acquisition module is used for acquiring a video data request, wherein the video data request is initiated by a first video network terminal in a first video network aiming at a second video network terminal in a second video network;
the first transmission module is used for transmitting video data from the first video network terminal to a first video network virtual terminal through the first video network, and the first video network virtual terminal is configured on a first video network server in the first video network;
the second transmission module is used for transmitting the video data from the first video network virtual terminal to a second video network virtual terminal through the communication cable, and the second video network virtual terminal is configured on a second video network server in the second video network;
and the third transmission module is used for transmitting the video data from the second video network virtual terminal to the second video network terminal through the second video network.
7. The apparatus of claim 6, further comprising:
the identification searching module is used for respectively searching the available video network terminal identifications in the first video network and the second video network before the video data are transmitted from the first video network terminal to the first video network virtual terminal through the first video network;
and the virtual terminal determining module is used for determining the first video network virtual terminal and the second video network virtual terminal according to the available video network terminal identification.
8. The apparatus of claim 7, further comprising:
the data request module is used for requesting video data from the second video networking virtual terminal by the first video networking virtual terminal according to the video data request;
and the second video network virtual terminal requests video data from the second video network terminal.
9. The apparatus of claim 6, further comprising:
and the video networking determining module is used for determining the second video networking according to the video networking terminal identification carried by the video data request before the video data is transmitted from the first video networking terminal to the first video networking virtual terminal through the first video networking, wherein the video networking terminal identification comprises a video networking identification.
10. The apparatus of claim 6, further comprising:
the fourth transmission module is used for transmitting the video data from the second video network terminal to the second video network virtual terminal through the second video network;
the fifth transmission module is used for transmitting the video data from the second video networking virtual terminal to the first video networking virtual terminal through the communication cable;
and the sixth transmission module is used for transmitting the video data from the first video network virtual terminal to the first video network terminal through the first video network.
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