CN103533358B - Self adaption image collection transmission display device - Google Patents
Self adaption image collection transmission display device Download PDFInfo
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- CN103533358B CN103533358B CN201310477702.4A CN201310477702A CN103533358B CN 103533358 B CN103533358 B CN 103533358B CN 201310477702 A CN201310477702 A CN 201310477702A CN 103533358 B CN103533358 B CN 103533358B
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Abstract
nullThe invention discloses a kind of self adaption image collection transmission display device of picture signal process field,Including input processing and format converting module、Frame buffer input module、H.264 compressed encoding module、Change detection module between picture frame、Frame buffer output module、Output scheduling and processing module、Control dispatching patcher module、Tcp/ip layer network package and unpack module and gigabit networking interface module,Different images is processed respectively by self adaption image collection transmission display device by change detection module between picture frame,Still frame adopts incompressible distributed treatment,Dynamic menu adopts the distributed treatment of compression coding formula,H.264 in compressed encoding module, coding module encodes according to the H.264 coding protocol of standard,The mode selected is still image quality、The mode of change code check encodes.The present invention has that picture quality is good, range of application is wider and the advantage such as equipment is reliable and stable.
Description
Technical field
The present invention relates to the software processor terminal of the change of a kind of details realizing self-adapting detecting signal source image, a kind of self adaption image collection transmission display device being mainly used in multiple large-screen splicing control terminal.
Background technology
nullThe existing distributed processors of existing market mainly has two kinds in terms of Signal sampling and processing angle,A kind of hardware processor being to adopt the FPGA incompressible collection of pure hardware realized and transmission,Another kind is the processor of the coded system adopting embedded platform or Software Compression and transmission. both processors are respectively arranged with the pluses and minuses of oneself,They whole overall frameworks are essentially identical,Signal input collection terminal is all the input node of all types of input signals having correspondence,Each output node is exported by switch after acquisition process,Finally exported each display wall unit by the instruction of output node response scheduling system,As shown in Figure 4: the advantage of incompressible distributed processors is that picture quality is good,Whole process and transmission are all without loss,But it is because without compression,One tunnel high definition has just almost taken two-way gigabit network interface,It is likely to result in network congestion,The requirement of switch is very high,Another have employed mac-layer protocol to improve network transmission efficiency,Thus it is difficult to and other network equipments or control system compatible;Adopting the advantage of distributed processors of compression coding formula is that to take the network bandwidth few, cost is low, but picture quality affects lossy by compression, for dynamic menu owing to visual effect difference is inconspicuous, but still frame especially computer writing is shown that edge substantially has fuzzy, still having not little impact when this is for seeing pcs signal with large-size screen monitors, this is also the link that user pays close attention to.
Summary of the invention
The invention aims to solve and overcome the problem of mass deviation when existing distributed software processor viewing still frame or pcs signal, the present invention provides a kind of method self-adapting detecting can input signal, if still frame then adopts lossless process to add the mode that lossy compression method combines, improve the picture quality of still frame greatly, overcome a major defect of distributed coding compression processing mode, widen the range of application of these series of products, it is provided that a kind of self adaption image collection transmission display device.
The present invention is achieved by the following technical solutions:
nullA kind of self adaption image collection transmission display device,Including input processing and format converting module、Frame buffer input module、H.264 compressed encoding module、Change detection module between picture frame、Frame buffer output module、Output scheduling and processing module、Control dispatching patcher module、Tcp/ip layer network package and unpack module and gigabit networking interface module,It is characterized in that: different images is processed respectively by self adaption image collection transmission display device by change detection module between picture frame,Still frame adopts incompressible distributed treatment,Dynamic menu adopts the distributed treatment of compression coding formula,Input processing and format converting module collection receive the incoming video signal of various forms,Two two field pictures are stored by frame buffer input module,Frame buffer input module is respectively transmitted the video data of buffer memory to coding module and Image Change Detection resume module,Wherein coding module encodes according to the H.264 coding protocol of standard,The mode selected is still image quality,The mode of change code check encodes,Frame buffer module reads, from frame buffer input module, the data that buffer memory one frame is new,Notice scheduler module has new data simultaneously,Scheduler module sends the data to the data of network packetization module packing frame buffer output module after being notified,Then pass through network output;Technique scheme is done further restriction, and video frequency output scheduling and processing module are that the order reception input node responding user by controlling dispatching patcher module sends the video data of coming, and decompress, process output;Technique scheme is done further restriction, and H.264 in compressed encoding module, coding module encodes according to the H.264 coding protocol of standard, the mode of selection be still image quality, change code check mode encode.
The present invention compared with prior art has the advantages that
1. picture quality is good;
2. range of application is wider;
3. equipment is reliable and stable.
Accompanying drawing explanation
Fig. 1 is self adaption image collection transmission display device compression input node inside structure schematic diagram;
Fig. 2 is self adaption image collection transmission display device compression output node inside structure schematic diagram;
Fig. 3 is embodiment system architecture schematic diagram;
Fig. 4 is the function general diagram of two kinds of processors;
Fig. 5 is uncompressed formula pure hardware input node inner bay composition;
Fig. 6 is uncompressed formula pure hardware output node inner bay composition;
Fig. 7 is compression input node inner bay composition;
Fig. 8 is compression output node inner bay composition.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, present disclosure is described further:
nullIt is illustrated in figure 1 self adaption image collection transmission display device compression input node inside structure schematic diagram,Including input processing and format converting module、Frame buffer input module、H.264 compressed encoding module、Change detection module between picture frame、Frame buffer output module、Output scheduling and processing module、Control dispatching patcher module、Tcp/ip layer network package and unpack module and gigabit networking interface module,Input processing module collection receives the incoming video signal of various forms,Two two field pictures are stored by frame buffer module,Frame buffer module is respectively transmitted the video data of buffer memory to coding module and Image Change Detection resume module,Wherein coding module encodes according to the H.264 coding protocol of standard,The mode selected is still image quality,The mode of change code check encodes,In this manner,Coding module in time just starting coding except,Other time only coded image change part,The part when code check of still frame is only dynamic menu in this manner;Picture material between two frames that Image Change Detection module is more up-to-date, difference relatively is without exceeding threshold value, then can be decided to be this two two field picture and be substantially free of change, if (within 2 seconds, this parameter can adjust other values in continuous more than 2 seconds, other values of such as 1 ~ 3 second) all detect and be not changed in, frame buffer module reads, from frame buffer input module, the data that buffer memory one frame is new, notice scheduler module has new data simultaneously, scheduler module sends the data to the data of network packetization module packing frame buffer output module after being notified, then pass through network output;nullFig. 2 is self adaption image collection transmission display device compression output node inside structure schematic diagram,Video frequency output node receives input node mainly by the order controlling dispatching patcher response user and sends the video data of coming,And decompress,Process output,When not receiving incompressible video requency frame data,General output node in whole decompression output and Fig. 8 is essentially identical,When receiving non-compression video frame of video,Incompressible frame data are directly output to frame buffer input module by input scheduling system,Whole frame data are directly replaced the frame buffer data of decoding output by frame buffer input module,So show to display wall unit by output processing,When such input node detects still frame,Output node be just able to receive that the incompressible frame data of input node do not have any loss be directly output to display wall unit,Reach best display effect;Due to coded system employing is static image quality, the mode of dynamic code rate, the part of decoder module only output image change exports to decoding frame buffer, therefore incompressible view data will not be capped when still frame, and different parts can be automatically override when dynamic menu occurs, when dynamic menu, the effect and the weak effect not having compression that are exported by compression coding and decompression are almost difficult to distinguish from very micro-naked eyes;Thus the shortcoming that when compensate for still frame, picture quality especially text effects is bad.
Embodiment
Fig. 3 is embodiment system architecture schematic diagram
nullHave three tunnel input nodes,Wherein a road is the traffic of CVBS photographic head shooting crossroad, urban district,One tunnel is the traffic of DVI high-definition camera shooting highway,Also having a road is the input of VGA pcs signal,Show for the information such as meeting and map,When controlling dispatching patcher switching CVBS photographic head and DVI camera signals when showing the display of wall unit,It is all receive dynamic image data when the two input node major part,By compressing output,Output display is decompressed by output node,And select VGA pcs signal when showing wall display in dispatching patcher,It is all lteral data or static map picture data when major part,At this time input node detects still frame and stores frame data and do not compress and be directly output to output node,Have output node to receive loss-free output to show to display wall unit;Although at this time single-frame images data volume is relatively larger, but owing to being that still frame is only small by the data volume of input node compression transmission, uses gigabit switch simultaneously, transmitted the frame data without compression at 2 ~ 5 seconds, fully achieve in real time, smooth display.
Claims (1)
- null1. a self adaption image collection transmission display device,Including input processing and format converting module、Frame buffer input module、H.264 compressed encoding module、Change detection module between picture frame、Frame buffer output module、Output scheduling and processing module、Control dispatching patcher module、Tcp/ip layer network package and unpack module and gigabit networking interface module,It is characterized in that: different images is processed respectively by self adaption image collection transmission display device by change detection module between picture frame,Still frame adopts incompressible distributed treatment,Dynamic menu adopts the distributed treatment of compression coding formula,Input processing and format converting module collection receive the incoming video signal of various forms,Two two field pictures are stored by frame buffer input module,Frame buffer input module is respectively transmitted the video data of buffer memory to H.264 change detection module process between compressed encoding module and picture frame,Wherein H.264 compressed encoding module encodes according to the H.264 coding protocol of standard,The mode selected is still image quality、The mode of change code check encodes,Frame buffer output module reads, from frame buffer input module, the data that buffer memory one frame is new,Notice controls dispatching patcher module simultaneously new data,Control send the data to tcp/ip layer network package after dispatching patcher module is notified and unpack the data of module packing frame buffer output module,Then pass through network output;Output scheduling and processing module are by controlling the video data that the order reception input node transmission of dispatching patcher module response user comes, and decompress, and process output.
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CN109474829A (en) * | 2018-12-03 | 2019-03-15 | 福州鑫图光电有限公司 | A kind of transmission based on digital camera, display methods and terminal |
CN113099308B (en) * | 2021-03-31 | 2023-10-27 | 聚好看科技股份有限公司 | Content display method, display equipment and image collector |
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