CN101938638A - Network video monitoring system based on resolution ratio grading transmission - Google Patents
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Abstract
The invention discloses a network video monitoring system based on resolution ratio grading transmission, comprising a monitoring acquisition terminal and a monitoring center, wherein the monitoring acquisition terminal is used for transmitting acquired videos to the monitoring center through a network. The network video monitoring system is characterized in that the monitoring acquisition terminal comprises a high-definition video camera, an acquisition control unit and network access equipment, wherein the high-definition video camera is used for acquiring high-definition video information; and the acquisition control unit is used for carrying out digital compression coding on the high-definition video information acquired by the high-definition video camera, also outputting high-definition video streams and ordinary video streams and outputting the high-definition video streams or the ordinary video streams according to a control signalling or presetting sent by the monitoring center. The invention can acquire high-definition monitoring videos under an interesting scene without special requirements for the type, the bandwidth, and the like of the network and well solves the problem of contradiction between an acquired high-definition video monitoring image and limited network transmission bandwidth in the prior art.
Description
Technical field
The present invention relates to a kind of network video monitor and control system, relate in particular to a kind of network video monitor and control system based on the resolution hierarchical transmission.
Background technology
Video monitoring system is mainly used in important area or remote site is monitored, the video monitoring technology is just obtaining application more and more widely in fields such as electric power system, telecommunications room, factory, urban transportation, water conservancy system, sub-district public security.The video information that video monitoring system will be gathered in the control point in real time is transferred to Surveillance center in time, reports the situation of monitored point real-time dynamicly, thereby in time pinpoints the problems and handle.
Traditional video monitoring system is a kind of analog video supervisory control system, and the analog video supervisory control system mainly is made up of front monitoring front-end and video wall.In the analog video supervisory control system, the video camera of front end sends to the matrix monitoring host computer by vision cable with analog signal, and the matrix monitoring host computer is transported to the analog video signal of receiving on the master control video wall again, for user monitoring.Wherein, video wall is made up of some display terminals.Because vision cable can only the transmission of one line analog video signal, if the control point disperses, just needs to lay the multitude of video cable, cause cost height, easy care not, very difficult realization remote monitoring on a large scale.In addition, in traditional video monitoring system,, be difficult on the whole each road vision signal be controlled because every road vision cable is relatively independent.
For overcoming above-mentioned drawback, increasing network video monitor and control system has appearred in the market, and be about to analog video signal and be converted into digital video frequency flow and pass through Network Transmission.For example, Chinese invention patent CN02125513 has proposed a kind of network digital video monitoring system, this video monitoring system is applied to field of video monitoring with the wideband digital technology, analog video signal is carried out after code conversion is digital video bit stream, carry out the digital video bitstream flow transmission by broadband network, re-use special-purpose decoding software and realize video monitoring on computers.All use a vision cable to carry out transmission manner though this scheme has changed each headend equipment, have wiring less, easy to maintenance, advantage such as monitoring range is wide.But this scheme is monitored multi-channel video by computer network, is subjected to machine performance and network bandwidth limitations, has problems such as monitoring image is little, image resolution ratio is low.
At the problem that exists among the Chinese invention patent CN02125513, a Chinese invention patent (application number is 200710177857.0, and open day is 2008-5-21) has proposed a kind of based on network video monitoring system.This system comprises front monitoring front-end, central platform and video wall, and wherein, front monitoring front-end is used to record front end video recording and the front end video recording coding of recording is changed into the medium code stream, the media code after transforming is spread deliver to central platform; Central platform is used to store the medium code stream that front monitoring front-end sends, and with the passage of media code stream distribution to video wall; Video wall is used for changing the media code circulation into analog video signal, and the displaying video monitoring video.But, the central platform that this scheme is introduced has increased the complexity that system realizes, and the transfer of data between front monitoring front-end and the central platform still needs to take Internet resources, and therefore there is the problem of Network Transmission bandwidth anxiety in this scheme, and institute's video resolution of obtaining is still very limited.
Because be subjected to the restriction of Network Transmission bandwidth, the image resolution ratio of the network video monitor and control system of main flow mostly is 640x480 greatly in the market.In many instances, the monitor video of this resolution can't clearly reflect the truth of monitoring scene.
In order to improve the resolution of monitor video, thereby the truth that clearly reflects monitoring scene, Chinese invention patent (application number is 200810010472.X, Granted publication CN101227598B, Granted publication day is 2010.06.02) has proposed a kind of HD video supervisory control system.This scheme adopts high-definition camera to obtain the on-the-spot high definition monitor video of monitoring, and transmits the high definition monitoring video flow by the fiber optic network of high bandwidth.Though this scheme can obtain high-resolution monitor video, need to adopt fiber optic network, network layout is loaded down with trivial details, and cost is higher, is unfavorable for large-scale extensive use.
Can find out that from the above the contradiction of obtaining between HD video monitoring image and the limited Network Transmission bandwidth that how to solve preferably that the existing network video monitoring system exists is still present letter problem to be solved.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, and a kind of restriction that can overcome the Network Transmission bandwidth is provided, and obtains the network video monitor and control system of HD video monitoring image according to the monitoring needs.
Thinking of the present invention is that the high definition monitor video that high-definition camera collects is carried out hierarchical coding output, be about to monitor video respectively digital compression be encoded to ordinary video stream and high definition video steaming, and select output ordinary video stream or high definition video steaming as required.
Particularly, the present invention is by the following technical solutions:
A kind of network video monitor and control system based on the resolution hierarchical transmission, comprise monitoring acquisition terminal and Surveillance center, the monitoring acquisition terminal is given Surveillance center with the video that collects by Network Transmission, and it is characterized in that: described monitoring acquisition terminal comprises high-definition camera, acquisition controlling unit and network access equipment; Described high-definition camera is gathered HD video information; Described acquisition controlling unit carries out the digital compression coding with the HD video information of described high-definition camera collection, export high definition video steaming and ordinary video stream simultaneously, and the control signaling that sends according to Surveillance center or set in advance by described network access equipment output high definition video steaming or ordinary video stream.
At first, obtain the on-the-spot HD video of monitoring by high-definition camera.As everyone knows, so-called HD video be meant video image resolution reach 720P (1280 * 720) or more than, the video that resolution is lower than 720P is an ordinary video.Present high definition camera technique is comparative maturity, and all kinds of high definition picture pick-up devices are also a lot of on the market, and technical solution of the present invention has no special requirements to high-definition camera, can choose according to actual needs.
The described acquisition controlling of technical solution of the present invention unit is a core of the present invention, and the HD video that high-definition camera need be collected is converted to high-definition digital video stream and ordinary numbers video flowing simultaneously, has not yet to see the pertinent literature record.Described acquisition controlling unit can adopt following two kinds of schemes:
Scheme one, utilize existing video decoding chip, for example TVP5150, TVP5158 etc., with the HD video information simulation conversion of signals of high-definition camera collection is digital video signal, use the video coding chip of the support multichannel output that is connected with this video decoding chip signal then, for example TMS320DM6467 also exports high definition video steaming and ordinary video stream by different Coding Compression Algorithm with the digital video signal compression respectively simultaneously;
Scheme two, acquisition controlling unit comprise the coding and decoding video module of at least two parallel connections, and this coding and decoding video module comprises that the analog video that is used for the high-definition camera collection is converted to the video decoding chip of digital video and the video coding chip of the single channel output that is connected with its signal; The concrete formation of described coding and decoding video module can be identical, also can be different, wherein at least one coding and decoding video module is encoded to high definition video steaming output with the analog video digital compression of high-definition camera collection, and another one coding and decoding video module is encoded to the output of ordinary video stream with the analog video digital compression of high-definition camera collection.
Technical solution of the present invention can be various wired or wireless networks to concrete network type no requirement (NR), as long as select corresponding network access equipment for use according to the concrete network that uses.
When carrying out daily monitoring, the acquisition controlling unit transfers to Surveillance center with ordinary video stream by network access equipment, the monitor staff monitors in real time, flows owing to respectively monitor the ordinary video that is of acquisition terminal transmission this moment, and is therefore less to taking of the network bandwidth; When the monitor staff notes abnormalities or during interested monitoring scene; can monitor acquisition terminal output high definition video steaming accordingly by Surveillance center's Long-distance Control; at this moment; though taking to some extent of the network bandwidth increased; but because indivedual monitoring acquisition terminal output high definition video steamings are only arranged; therefore the network bandwidth that additionally takies is very limited, and existing all kinds of wired, wireless networks all can satisfy the corresponding bandwidth requirement.
Though technique scheme preferably resolves the contradiction of obtaining between HD video monitoring image and the limited Network Transmission bandwidth, can realize HD video monitoring to specifically monitored scene, and the requirement to the network bandwidth is lower, but this scheme can't realize the high definition monitor video of any monitoring scene is reviewed, for addressing this problem, can further increase video storaging equipment, the input-output equipment that is connected with the acquisition controlling cell signal respectively in technique scheme, video storaging equipment is used for the storage of high definition monitor video; Input-output equipment is used for extracting the video of described video storaging equipment, and the operating state that the acquisition controlling unit is set.In the time need reviewing, can extract corresponding high definition monitor video at an easy rate by this video storaging equipment and input-output equipment to a certain monitoring scene in a certain moment in past.
The present invention obtains the real-time monitor video of high definition by high-definition camera, and with monitor video respectively digital compression be encoded to ordinary video stream and high definition video steaming, select according to actual needs to Surveillance center's output ordinary video stream or high definition video steaming.The present invention can obtain the high definition monitor video under the scene of interest, and to no specific (special) requirements such as the type of network, bandwidth, and what solved well that prior art exists obtains contradiction between HD video monitoring image and the limited Network Transmission bandwidth.
Description of drawings
Fig. 1 is the structural representation of the network video monitor and control system based on the resolution hierarchical transmission of the present invention;
Fig. 2 is the structured flowchart of the network video monitor and control system specific embodiment one based on the resolution hierarchical transmission of the present invention;
Fig. 3 is the structured flowchart of the network video monitor and control system specific embodiment two based on the resolution hierarchical transmission of the present invention;
Fig. 4 is the software flow pattern of the network video monitor and control system specific embodiment one based on the resolution hierarchical transmission of the present invention;
Fig. 5 is the software flow pattern of the network video monitor and control system specific embodiment two based on the resolution hierarchical transmission of the present invention.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated.
Network video monitor and control system based on the resolution hierarchical transmission of the present invention, as shown in Figure 1, comprise monitoring acquisition terminal and Surveillance center, the monitoring acquisition terminal is given Surveillance center with the video that collects by Network Transmission, and it is characterized in that: described monitoring acquisition terminal comprises high-definition camera, acquisition controlling unit and network access equipment; Described high-definition camera is gathered HD video information; Described acquisition controlling unit carries out the digital compression coding with the HD video information of described high-definition camera collection, export high definition video steaming and ordinary video stream simultaneously, and the control signaling that sends according to Surveillance center or set in advance by described network access equipment output high definition video steaming or ordinary video stream.
Below in conjunction with specific embodiment technical solution of the present invention is further specified,
Embodiment one:
In the present embodiment, video camera adopts 1080P CMOS high-definition camera; The acquisition controlling unit comprises: the analog video that is used for gathering is converted to the video decoding chip TVP5158 of digital video, the video coding chip TMS320DM6467 of the support multichannel output that is connected with video decoding chip TVP5158 signal, SATA big capacity hard disk that is connected with video coding chip TMS320DM6467 signal and USB 2.0 interfaces, general purpose I/O interface (GPIO) respectively; Network access equipment is the RJ45 interface, by this interface access network based on ethernet; Surveillance center adopts large-screen tv wall commonly used.The structure of whole system as shown in Figure 2.
The video coding chip TMS320DM6467 that present embodiment adopts is a kind of high-performance Davinci polycaryon processor based on DSP that TI company produces.This chip adopts HD video/image coprocessor (HD-VICP), transform engine and target video port interface, aspect high definition coding, decoding and the transcoding of carrying out synchronous multi-format (1080p@30fps, 1080i@60fps, 720p@60fps), improved ten times than former processor performance.The prominent features of this chip is supported the multi-channel video encoding and decoding exactly, and supports two SATA hard-disk interfaces, USB2.0 interface, Ethernet etc.
When monitoring, video camera obtains the on-the-spot high definition monitor video of monitoring in real time, the simulation HD video that video decoding chip TVP5158 will obtain is converted to digital video, the image compression encoding that video coding chip TMS320DM6467 obtains video camera is high definition video steaming (as 1080P) and ordinary video stream (as D1), high definition video steaming stores big capacity SATA hard disk into by ata interface, and the Ethernet that ordinary video flows by the RJ45 interface sends to Surveillance center.Generally, the video flowing that is transferred to Surveillance center is ordinary video stream; And take place when unusual, Surveillance center sends instruction to TMS320DM6467, to improve video definition until HD video, when the monitoring scene of needs before reviewing, can extract the high definition monitor video of SATA big hard disk storage by the USB2.0 interface, GPIO is used to be provided with the operating state of acquisition controlling unit and the expansion of system later on.
The software control flow process of present embodiment as shown in Figure 4, comprising:
1. system initialization;
2. high definition camera collection video information, and send into the acquisition controlling unit;
3. acquisition controlling cell processing video information with its boil down to high definition video steaming, and deposits the SATA big hard disk in;
4. detect the video definition buffer status,, send into network access equipment then to video compression if the ordinary sharpness video is the ordinary sharpness video flowing then; If HD video is then directly sent into network access equipment;
5. pass through the transmission of wired or wireless network, video flowing is reached Surveillance center.Surveillance center when needs are adjusted video definition, sends instruction to the video definition register except receiver, video information, upgrade the video definition buffer status in time to obtain the video of required definition.
Embodiment two:
In the present embodiment, video camera adopts 720P CCD high-definition camera; The acquisition controlling unit comprises the coding and decoding video module of two parallel connections, each coding and decoding video module comprises: the analog video that is used for gathering is converted to the video decoding chip TVP5146 of digital video, the video coding chip TMS320DM6446 that only has the single channel output function that is connected with video decoding chip TVP5146 signal.One of them coding and decoding video module is connected with SATA big hard disk, USB2.0 interface and GPIO, realizes HD video (D4 (720P)) output by the MPEG-4 encoding and decoding, simultaneously HD video is deposited in the SATA big hard disk; Another one coding and decoding video module is used to produce the ordinary sharpness video, by H.264 encoding and decoding realization ordinary sharpness videos (D1 (480i)) output.In order to switch the video flowing of output in real time by the Long-distance Control of Surveillance center, the two-path video information of output is all sent into a processing platform, this processing platform is the ARM processing platform in the present embodiment, the ARM processing platform is according to the instruction of Surveillance center, select wherein one tunnel of HD video or ordinary sharpness video, give Surveillance center by Network Transmission; Other parts are identical with embodiment one in the present embodiment, and concrete structure as shown in Figure 3.
The video coding chip TMS320DM6446 that present embodiment adopts is that a Davinci medium that TI company produces are handled dedicated devices, it adopts ARM+DSP double-core framework, in 8 concurrent operation unit are arranged, adopt two-level cache, be integrated with multiple being applicable to and look interior resource of sheet and the interface that the audio frequency multimedia is handled.Compare with TMS320DM6467, the development difficulty and the cost of Video Applications reduce greatly, but this chip is only supported the output of one road video, therefore needs two codings that carry out ordinary video and HD video respectively.
The software control flow process of present embodiment as shown in Figure 5, comprising:
1. system initialization;
2. high definition camera collection video information divides two-way to send into two coding and decoding video modules respectively;
3. acquisition controlling cell processing video information is leaded up to MPEG-4 encoding and decoding boil down to high definition video steaming (D4 (720P)), and deposits the SATA big hard disk in; H.264 encoding and decoding boil down to ordinary sharpness video (D1 (480i)) is passed through on another road.
4. detect the video definition buffer status,, send into network access equipment then if the ordinary sharpness video then transmits the ordinary sharpness video flowing; If HD video then transmits HD video, and sends into network access equipment;
5. pass through the transmission of wired or wireless network, video flowing is reached Surveillance center.Surveillance center when needs are adjusted video definition, sends instruction to the video definition register except receiver, video information, upgrade the video definition buffer status in time to obtain the video of required definition.
The foregoing description is the preferable possible embodiments of the present invention, is not in order to limiting scope of patent protection of the present invention, and therefore the equivalent structure done of every utilization specification of the present invention and accompanying drawing content changes, and all should be included in protection scope of the present invention.
Claims (5)
1. network video monitor and control system based on the resolution hierarchical transmission, comprise monitoring acquisition terminal and Surveillance center, the monitoring acquisition terminal is given Surveillance center with the video that collects by Network Transmission, it is characterized in that described monitoring acquisition terminal comprises high-definition camera, acquisition controlling unit and network access equipment; Described high-definition camera is gathered HD video information; Described acquisition controlling unit carries out the digital compression coding with the HD video information of described high-definition camera collection, export high definition video steaming and ordinary video stream simultaneously, and the control signaling that sends according to Surveillance center or set in advance by described network access equipment output high definition video steaming or ordinary video stream.
2. according to the described network video monitor and control system of claim 1, it is characterized in that described monitoring acquisition terminal also comprises video storaging equipment, the input-output equipment that is connected with described acquisition controlling cell signal respectively based on the resolution hierarchical transmission; Described video storaging equipment is used for the high definition video steaming of storage of collected control unit output; Described input-output equipment is used for extracting the video of described video storaging equipment, and the operating state that the acquisition controlling unit is set.
3. according to claim 1 or 2 described network video monitor and control systems based on the resolution hierarchical transmission, it is characterized in that described acquisition controlling unit comprises that the analog video that is used for the high-definition camera collection is converted to the video decoding chip of digital video and the video coding chip of the support multichannel output that is connected with described video decoding chip signal.
4. according to claim 1 or 2 described network video monitor and control systems based on the resolution hierarchical transmission, it is characterized in that, described acquisition controlling unit comprises the coding and decoding video module of at least two parallel connections, and described coding and decoding video module comprises that the analog video that is used for the high-definition camera collection is converted to the video decoding chip of digital video and the video coding chip of the single channel output that is connected with described video decoding chip signal; Wherein at least one coding and decoding video module is encoded to high definition video steaming output with the analog video digital compression of high-definition camera collection, and another one coding and decoding video module is encoded to the output of ordinary video stream with the analog video digital compression of high-definition camera collection.
5. according to the described network video monitor and control system of claim 4, it is characterized in that described acquisition controlling unit also comprises a processing platform based on the resolution hierarchical transmission; The video of described coding and decoding video module output is all imported this processing platform; This processing platform exports Surveillance center according to Instruction Selection one road video of Surveillance center to by Network Interface Unit.
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