CN103281516A - Portable video terminal, video return system and method - Google Patents

Abstract

A portable video terminal, video return system and method, the video return system includes: a remote part and a local part; the local part includes: a local monitoring client, a first router, a firewall and a decoding distributor; the remote Part includes: a portable video terminal and a second router; the portable video terminal includes: a terminal body, a 3G card and a portable button camera; the terminal body is provided with a central processing chip, a 3G antenna, an antenna interface module, and a video encoding chip , a video interface module, a network port, a wireless network switch and a 3G card interface module; the antenna interface module, the 3G card and the wireless network switch are connected to the central processing chip through the 3G card interface module respectively. The invention adopts a portable camera terminal with a small volume and has a dual-network operation function, and solves the problem that the wireless 3G network cannot carry out video return transmission under the condition of a weak signal.

Description

A portable video terminal, video return system and method

technical field

The present invention relates to video backhaul technology, in particular to a portable video terminal, video backhaul system and method.

Background technique

With the increasingly heavy work of communication dispatching, there are more or less uncoordinated situations in the new work reform based on the previous information dispatching method. In the past scheduling method, faults or problems can only be described by telephone or MMS, which is not intuitive, but also easily leads to different decision-making results due to the deviation of the description, which affects the work efficiency.

In order to solve the existing problems and improve the work efficiency of communication dispatchers and on-site operation and maintenance personnel, remote video transmission is generally used for work.

At present, there are generally two methods for remote video backhaul technology, one is to install a camera at a fixed point, and the other is to use a portable camera. The following introduces them respectively:

Fixed-point camera installation: The fixed-point camera installation method is realized by the camera, DVR (Digital Video Recorder) server, which will be transmitted to the local server through the wired network, and finally monitored by the local display device, as shown in the figure 1. Due to the use of fixed cameras and wired network transmission, the return video quality and transmission speed are guaranteed, but due to the limitations of fixed installation, many dead angles cannot be observed, so it does not meet the requirements of communication dispatching auxiliary processing substations and other computer rooms. According to the requirements of the problem, the system has the disadvantage of low overall flexibility.

Portable camera mode: Generally, this mode is composed of a portable camera, mobile power supply and mobile server, transmitted through a wireless 3G network, to a local video server, and monitored through a display device. The specific composition is shown in Figure 2 below. Although the portable camera method can realize the real-time video transmission function of the mobile camera, it still does not realize the portability in the true sense, because the system design requires a mobile server in addition to the portable camera. If the mobile server does not have a built-in power supply, a mobile power supply is also required. support, the nodes and equipment are still not the simplest, and the operation for on-site personnel is not simple and direct enough, and the mobile server is generally not small in size and light in weight, so it is not very suitable for on-site personnel to carry; using wireless 3G backhaul, In places where the signal is weak, the video effect and transmission speed will also be affected to a certain extent.

Contents of the invention

The invention provides a portable video terminal, a video return system and a method to solve the problem that the wireless 3G network cannot carry out video return under the condition of weak signal.

In order to achieve the above object, the present invention provides a portable video terminal, which includes: a terminal body, a 3G card and a portable button camera, wherein,

The terminal body is provided with a central processing chip, 3G antenna, antenna interface module, video encoding chip, video interface module, network port, wireless network switch and 3G card interface module; the antenna interface module, 3G card and wireless network The switch is connected to the central processing chip through the 3G card interface module respectively; the video signal taken by the portable button camera is sent to the central processing chip through the video interface module and the video coding chip successively, so that The central processing chip is connected to a power dedicated network through the network port to transmit the video signal, or the video signal is transmitted through the 3G antenna.

In one embodiment, the terminal body is further provided with: a network automatic identification chip, which is respectively connected to the network switch, the central processing chip and the network port.

In one embodiment, the network port is an RJ45 network port.

In an embodiment, the terminal body is further provided with: a power interface module.

In an embodiment, the terminal body is further provided with: a charging interface.

In order to achieve the above object, the present invention provides a video backhaul system, the video backhaul system includes: a remote part and a local part;

The local part includes: a local monitoring client, a first router, a firewall, and a decoding distributor; the remote part includes: a portable video terminal and a second router; In the network, the video signal is sent to the local monitoring client successively through the second router and the first router, or the video signal is sent to the described decoding distributor, the firewall and the first router in sequence in the 3G network. local monitoring client;

The portable video terminal includes: a terminal body, a 3G card and a portable button camera; the terminal body is provided with a central processing chip, a 3G antenna, an antenna interface module, a video encoding chip, a video interface module, a network port, and a wireless network switch And 3G card interface module; Described antenna interface module, 3G card and wireless network switch connect described central processing chip through described 3G card interface module respectively; The video signal that described portable button camera shoots passes through described The video interface module and the video encoding chip are sent to the central processing chip, and the central processing chip is connected to the power dedicated network through the network port to transmit the video signal or transmit the video signal through the 3G antenna. video signal.

In one embodiment, the terminal body is further provided with: a network automatic identification chip, which is respectively connected to the network switch, the central processing chip and the network port.

In one embodiment, the network automatic identification chip is a single-chip microcomputer or FPGA.

In an embodiment, the terminal body is further provided with: a power interface module.

In an embodiment, the terminal body is further provided with: a charging interface.

In order to achieve the above object, the present invention provides a video return method, the video return method includes: acquiring a video signal through the portable button camera; performing an encoding operation on the acquired video signal to generate an encoded The video signal; comparing the current network speed with a preset network speed threshold, and selecting the return network of the encoded video signal; using the selected return network to return the encoded video signal Local monitoring client.

In one embodiment, when the selected return network is a 3G network, the encoded video signal is sent back to the local monitoring client using the selected return network, including:

Utilize the 3G network to send the encoded video signal to the decoding distributor for decoding, and generate a decoded video signal;

The decoded video signal is sent back to the local monitoring client through the electric power dedicated network after the address translation of the 3G network.

The beneficial effect of the present invention is that the present invention adopts a small portable camera terminal, and has a dual-network operation function, which solves the problem that the wireless 3G network cannot perform video return under the condition of weak signal, and expands the application range of the system .

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a structural schematic diagram of video signal return using a fixed-point installation of a camera in the prior art;

Fig. 2 is the structure schematic diagram that adopts portable camera mode to carry out video signal return in the prior art;

FIG. 3 is a schematic structural diagram of a video return system according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a portable video terminal according to an embodiment of the present invention;

5 is a schematic structural diagram of a terminal body of a portable video terminal according to an embodiment of the present invention;

FIG. 6 is a flowchart of a video return method according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 3, this embodiment provides a video return system, the video return system includes: a remote part and a local part;

The local part includes: a local monitoring client 301 , a first router 302 , a firewall 303 and a decoding distributor 304 . The remote part includes: a portable video terminal 305 and a second router 306 .

The local monitoring client 301, the first router 302, the firewall 303 and the decoding distributor 304 are connected sequentially, the local monitoring client 301 and the first router 302 are connected through a wired connection through the electric power private network, and the first router 302 and the firewall 303 are also connected through the electric power private network Wired connection, but the decoding distributor 304 is connected to the portable video terminal 305 through a 3G network (public network). In addition, the portable video terminal 305 is also connected to the power dedicated network through the second router 306 , and then connected to the local monitoring client 301 .

The portable video terminal 305 sends the video signal to the local monitoring client 301 through the second router 306 and the first router 302 sequentially in the electric power dedicated network, or sends the video signal through the 3G network in sequence The decoding distributor 304 , the firewall 303 and the first router 302 send to the local monitoring client 301 .

In the video return system shown in FIG. 3 , video collection is performed by the portable video terminal 305 at the work site, and the collected video signals can be returned through a wireless 3G network or a dedicated power network. In places where the 3G signal is strong, the 3G network transmission method can be mainly used for video signal return; when the 3G signal is weak, the video signal return can be carried out by using the wired transmission method using the dedicated power network in the computer room. The design of the video capture at the work site and the optional signal return method greatly enhances the overall practicability and flexibility of the system.

As shown in Figure 3, the video signals sent back by the remote end through the 3G wireless network transmission method or the electric power dedicated network are finally connected to the local video signal through the electric power dedicated network, which is called by the communication dispatcher at any time. The following briefly introduces the implementation steps of the two network transmission methods:

1. Remote wired power dedicated network → local wired power dedicated network

The remote wired power private network is connected to the local power integrated data network juniper T640 router 302 through the remote power integrated data network juniper T640 router 305, and the local juniper T640 router 302 carries out policy formulation and dispatches the remote video assistant decision-making system for this communication Divide a dedicated video VPN, communicate and return video signals to each substation site through a 155M circuit. In the video-only VPN, dedicated IP addresses are allocated for the portable video terminal 305 and local monitoring client 301 of the system, and the local juniper T640 router 302 is connected to the local monitoring client 301 through a network switch to monitor the client locally The terminal 301 receives the video signal sent back from the remote end, and realizes remote scheduling auxiliary decision-making.

2. Remote wireless 3G network → local wired power dedicated network

Add a network firewall locally, connect the remote wireless 3G network to the decoding distributor 304 first, decode and distribute the video signal returned by the wireless 3G, and then directly connect to the local firewall 303 through the 3G network transmission, through the firewall 303 that is sure. In order to ensure network security, it is necessary to set isolation security settings in the policy, limit the network port, reserve the necessary transmission ports, and formulate the policy as one-way transmission from the external network, that is, only receive video signals returned from the external network in one direction; perform address translation , through address mapping, the public network IP is converted to the IP address of the video VPN divided by the private network of the power data network, and can communicate with the private power network under the condition of ensuring network security, realizing wireless 3G network backhaul through the private power network The video signal is received first at the local monitoring client 301 to realize on-site remote auxiliary decision-making.

In addition to the dual-network selective transmission of video signals, the video return system also uses a button camera as a video capture device for a portable video terminal, and the portable video terminal 305 is about the size of a mobile phone, small in size, easy to carry, and can be captured at the same time. Video signal, while coordinating with communication scheduling to carry out on-site work, the structure of the portable video terminal 305 is shown in Figure 4 and Figure 5 .

In FIG. 4 , the portable video terminal 305 includes: a terminal body 401 , a 3G card 402 and a portable button camera 403 .

As shown in Figures 4 and 5, the terminal body is provided with a central processing chip 501, a 3G antenna 404, an antenna interface module 502, a video encoding chip 503, a video interface module 504, a network port 505, a wireless network switch 506 and a 3G card interface module 507 .

The antenna interface module 502 , the 3G card 402 and the wireless network switch 506 are respectively connected to the central processing chip 501 through the 3G card interface module 507 .

The video signal that described portable button camera 403 shoots is sent to described central processing chip 501 through described video interface module 504 and video coding chip 503 successively, and described central processing chip 501 is connected by described network port 505 The electric power dedicated network transmits the video signal or transmits the video signal through the 3G antenna 404 . Preferably, the central processing chip 501 can be a hardware structure such as a single-chip microcomputer or MCU, and the network port can be an RJ45 network port, which is not limited in the present invention.

The function of the wireless network switch 506 is to cut off the wireless network switch 506 when the 3G signal is weak, and use the power dedicated network in the computer room to transmit the video signal back by wired transmission. The control of the wireless network switch 506 can be switched manually or automatically through a set program.

In a preferred embodiment, the terminal body 401 is further provided with: an automatic network identification chip 508, which is respectively connected to the network switch, the central processing chip and the network port. The network automatic identification chip 508 can be a single-chip microcomputer or FPGA, and its function is to automatically realize the switching between the wireless 3G network and the electric power dedicated network when the wireless network switch 506 is closed. For example, the switching threshold can be set. If the current network is a wireless 3G network, the network automatic identification chip 508 will detect the network speed of the wireless 3G network. When the network speed of the wireless 3G network is less than 30KB/S, it will automatically switch to the power dedicated network for backhaul. For video, if the speed of the wireless 3G network is greater than 30KB/S, it will automatically switch to the wireless 3G network to return the video.

Of course, for some confidential video information, for the sake of safety, it can only be transmitted through the power dedicated network, and at this time, it is only necessary to cut off the wireless network switch 506. The wireless network switch 506 is used in conjunction with the automatic network identification chip 508 to make the video signal transmission flexible and also ensure the security of the video signal transmission.

In a preferred embodiment, the terminal body 401 is further provided with: a lithium battery 405 and a power interface module 509 through which a power supply can be connected.

Preferably, the terminal body is further provided with: a charging interface 406 for charging the portable video terminal 305 .

As shown in Figure 6, the present invention provides a video return method, the video return system of the present invention, the video return method includes the following steps:

Step S601: Obtain video signals through the portable button camera. The video signal is the video signal when the substation site is faulty. For example, when the substation site encounters a situation that requires communication dispatching decision-making to solve, the video of the substation site can be taken.

Step S602: The video encoding chip 503 performs an encoding operation on the acquired video signal to generate the encoded video signal.

Step S603: comparing the current network speed with a preset network speed threshold, and selecting a return network for the encoded video signal.

When the wireless network switch 506 is disconnected, the 3G network is disconnected, and only the electric power dedicated network can be used for video return. When the wireless network switch 506 is closed and the network cable of the power dedicated network is connected, the network automatic identification chip 508 automatically identifies the current network speed of the 3G network, if the current network speed is greater than the preset network speed threshold (for example, it can be preset to 30KB /S), the 3G network will be selected for video backhaul. If the current network speed is lower than the preset network speed threshold, the power dedicated network will be selected for video return.

Step S604: Send the encoded video signal back to the local monitoring client through the selected backhaul network.

When the selected backhaul network is a 3G network, use the 3G network to send the encoded video signal to the local decoding distributor for decoding, generate a decoded video signal, and then transmit the decoded video signal to the local After the 3G network performs address translation through the firewall, the decoded video signal is sent back to the local monitoring client through the power dedicated network, and then the local monitoring client performs communication scheduling on the decoded information.

When the selected backhaul network is a power dedicated network, use the power dedicated network to the local monitoring client, and the video signal transmitted through the power dedicated network is the video signal encoded by the video encoding chip, and the local monitoring client also needs to perform video decoding , and then the local monitoring client performs communication scheduling on the decoded information.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, 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, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

In the present invention, specific examples have been applied to explain the principles and implementation methods of the present invention, and the descriptions of the above examples are only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to this The idea of the invention will have changes in the specific implementation and scope of application. To sum up, the contents of this specification should not be construed as limiting the present invention.

Claims (9)

1. a portable video terminal is characterized in that, described portable video terminal comprises: the terminal body, and 3G card and portable button video camera, wherein,

Described terminal body is provided with central processing element, 3G antenna, antenna interface module, video coding chip, video interface module, network interface, wireless network switch and 3G card interface module; Described antenna interface module, 3G card and wireless network switch connect described central processing element by described 3G card interface module respectively; The vision signal that described portable button video camera is taken sends to described central processing element through described video interface module and video coding chip successively, and described central processing element connects by described network interface that the electric power dedicated network transmits described vision signal or by the described vision signal of described 3G antenna transmission.

2. portable video terminal according to claim 1 is characterized in that, also is provided with on the described terminal body: the automatic identification chip of network is connected respectively with described network switching, central processing element and network interface.

3. portable video terminal according to claim 1 and 2 is characterized in that, described network interface is the RJ45 network interface.

4. portable video terminal according to claim 3 is characterized in that, also is provided with on the described terminal body: power supply interface module.

5. portable video terminal according to claim 4 is characterized in that, also is provided with on the described terminal body: charging inlet.

6. a video return system is characterized in that, described video return system comprises: distal portions and local part;

Described local part comprises: local monitor client, the first router, fire compartment wall and decoding distributor; Described distal portions comprises: portable video terminal and the second router; Described portable video terminal sends to described local monitor client by described the second router, the first router with vision signal successively in the electric power dedicated network, perhaps vision signal is sent to described local monitor client by described decoding distributor, fire compartment wall and the first router successively in 3G network;

Described portable video terminal comprises: terminal body, 3G card and portable button video camera; Described terminal body is provided with central processing element, 3G antenna, antenna interface module, video coding chip, video interface module, network interface, wireless network switch and 3G card interface module; Described antenna interface module, 3G card and wireless network switch connect described central processing element by described 3G card interface module respectively; The vision signal that described portable button video camera is taken sends to described central processing element through described video interface module and video coding chip successively, and described central processing element connects by described network interface that the electric power dedicated network transmits described vision signal or by the described vision signal of described 3G antenna transmission.

7. video return system according to claim 6, it is characterized in that, also be provided with on the described terminal body: the automatic identification chip of network, be connected respectively with described network switching, central processing element and network interface, be used for selecting by 3G network or electric power dedicated network passback vision signal according to the transmission speed of 3G network.

8. a video retransmission method is applied to the described video return system of claim 7, it is characterized in that described video retransmission method comprises:

Obtain vision signal by described portable button video camera;

Described encoding video signal operation to obtaining generates the described vision signal after encoding;

Current network speed and the network speed threshold value of presetting are compared the return network of the described vision signal after selecting to encode;

Utilize the described vision signal after the return network of selecting will be encoded to return to the local monitor client.

9. video retransmission method according to claim 8 is characterized in that, when the return network of selecting was 3G network, the vision signal after the return network that utilization is selected will be encoded returned the monitor client to this locality, comprising:

Utilize the described decoding video signal after described 3G network is encoded to described decoding distributor transmission, generate decoded vision signal;

Decoded described vision signal returns decoded described vision signal to the local monitor client by described electric power dedicated network through after the address transition at described 3G network.

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