CN204598182U

CN204598182U - Self adaption image collection transmission display unit

Info

Publication number: CN204598182U
Application number: CN201520293308.XU
Authority: CN
Inventors: 闫培祥
Original assignee: Shanghai Wei Ershi Science And Technology Co Ltd
Current assignee: Shanghai Wei Ershi Science And Technology Co Ltd
Priority date: 2015-05-08
Filing date: 2015-05-08
Publication date: 2015-08-26
Anticipated expiration: 2025-05-08

Abstract

The utility model relates to a kind of self adaption image collection transmission display unit, comprise image capture module, coding module, decoder module and output module, image capture module is for carry out IMAQ based on OV7670 imageing sensor, the picture signal that imageing sensor gathers by the main control chip of acquisition module is through dynamic random access memory data buffer storage, self adaption image collection transmission display unit detects different images by picture frame detection module and processes respectively, rest image adopts uncompressed process, dynamic image adopts encoding compression processing, pattern of the input modular converter receives incoming video signal, dynamic image sends the process of coding module compressed encoding to, dynamic image after coding is exported by output processing module, still image directly exports from output processing module.

Description

Self adaption image collection transmission display unit

Technical field

The present utility model relates to a kind of self adaption image collection transmission display unit controlled for screen terminal in image procossing transmission display field.

Background technology

The existing distributed processors of existing market mainly contains two kinds viewed from Signal sampling and processing angle, a kind of is adopt the incompressible collection of pure hardware of FPGA realization and the hardware processor of transmission, another kind adopts the processor of the coded system of embedded platform or Software Compression and transmission. these two kinds of processors respectively have oneself pluses and minuses, their whole overall frameworks are substantially identical, signal input collection terminal is all the input node having corresponding all types of input signals, each output node is outputted to by switch after acquisition process, finally export each display wall unit by the instruction of output node response scheduling system, the advantage of incompressible distributed processors is that picture quality is good, whole process and transmission all do not have loss, but due to not compression, one tunnel high definition has just almost taken two-way gigabit network interface, network congestion may be caused, very high to the requirement of switch, separately have employed mac-layer protocol to improve network transmission efficiency, so just be difficult to and other network equipments or control system compatibility, the advantage of the distributed processors of compression coding formula is adopted to be that to take the network bandwidth few, cost is low, but picture quality affects lossy by compression, for dynamic menu because visual effect difference is not obvious, but obviously have fuzzy for still frame especially computer writing display edge, this is for still there being not little impact when seeing pcs signal with large-size screen monitors, this is also the link that user pays close attention to.

Summary of the invention

The purpose of the present utility model be in order to solve and overcome existing distributed software processor viewing still frame or pcs signal time mass deviation problem, provide a kind of and then adopt lossless process, dynamic image to carry out the self adaption image collection transmission display unit of lossy compression method combination to still frame.

The utility model is achieved through the following technical solutions:

A kind of self adaption image collection transmission display unit, comprise image capture module, coding module, decoder module and output module, it is characterized in that: image capture module is for carry out IMAQ based on OV7670 imageing sensor, the picture signal that imageing sensor gathers by the main control chip of acquisition module is through dynamic random access memory data buffer storage, picture signal is by coding module compressed encoding, coding module comprises pattern of the input modular converter, frame buffer input module, compressed encoding module and picture frame detection module, output module comprises frame buffer output module, output processing module and output control system, decoder module comprises parse module and interface module, self adaption image collection transmission display unit detects different images by picture frame detection module and processes respectively, rest image adopts uncompressed process, dynamic image adopts encoding compression processing, pattern of the input modular converter receives incoming video signal, two two field pictures are stored by frame buffer input module, frame buffer input module the image data transmission of buffer memory to picture frame detection module, differentiate between images is still image or dynamic image, dynamic image sends the process of coding module compressed encoding to, wherein coding module is encoded according to the H.264 coding protocol of standard, dynamic image after coding is exported by output processing module, still image directly exports from output processing module, H.264 in compressed encoding module, coding module is encoded according to the H.264 coding protocol of standard, and the mode selected is still image quality, the mode of change code check is encoded.

The utility model compared with prior art has following beneficial effect:

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 unit internal structure schematic diagram.

Embodiment

Below in conjunction with accompanying drawing, content of the present utility model is described further:

As shown be self adaption image collection transmission display unit compression input node inside structure schematic diagram, comprise 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 and Schedule system module, tcp/ip layer network package and parse module and gigabit networking interface module, input processing module collection receives the incoming video signal of various form, two two field pictures are stored by frame buffer module, frame buffer module sends coding module and Image Change Detection resume module to respectively the video data of buffer memory, wherein coding module is encoded according to the H.264 coding protocol of standard, the mode selected is still image quality, the mode of change code check is encoded, in this manner, except when coding module is except just starting coding, 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, if difference relatively does not exceed threshold value, then can be decided to be this two two field picture substantially not 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) not change all detected, frame buffer module reads the new data of buffer memory one frame from frame buffer input module, notify that scheduler module has new data simultaneously, send the data to the data of network packetization module packing frame buffer output module after scheduler module is notified, then exported by network, video frequency output node mainly receives by the order of Control and Schedule system responses user the video data that input node sends, and decompress(ion), process exports, when not receiving incompressible video requency frame data, when receiving non-compression video frame of video, incompressible frame data are directly outputted to frame buffer input module by input scheduling system, whole frame data are directly replaced the frame buffer data that decoding exports by frame buffer input module, so give the display of display wall unit by output processing, when such input node detects still frame, the incompressible frame data that output node just can receive input node show wall unit without any directly exporting to of loss, reach best display effect, due to coded system employing is still image quality, the mode of dynamic code rate, the decoder module part that only output image changes exports to decoded frame buffer memory, therefore incompressible view data can not be capped when still frame, and different parts automatically can be override when dynamic menu occurs, when dynamic menu, by compression coding and decompress export effect and not have compress weak effect distance very micro-naked eyes be almost difficult to distinguish, thus the picture quality shortcoming that especially text effects is bad when compensate for still frame.

Claims

1. a self adaption image collection transmission display unit, comprise image capture module, coding module, decoder module and output module, it is characterized in that: image capture module is for carry out IMAQ based on OV7670 imageing sensor, the picture signal that imageing sensor gathers by the main control chip of acquisition module is through dynamic random access memory data buffer storage, picture signal is by coding module compressed encoding, coding module comprises pattern of the input modular converter, frame buffer input module, compressed encoding module and picture frame detection module, output module comprises frame buffer output module, output processing module and output control system, decoder module comprises parse module and interface module, self adaption image collection transmission display unit detects different images by picture frame detection module and processes respectively, rest image adopts uncompressed process, dynamic image adopts encoding compression processing, pattern of the input modular converter receives incoming video signal, two two field pictures are stored by frame buffer input module, frame buffer input module the image data transmission of buffer memory to picture frame detection module, differentiate between images is still image or dynamic image, dynamic image sends the process of coding module compressed encoding to, wherein coding module is encoded according to the H.264 coding protocol of standard, dynamic image after coding is exported by output processing module, still image directly exports from output processing module.

2. self adaption image collection transmission display unit according to claim 1, it is characterized in that: H.264 in compressed encoding module, coding module is encoded according to the H.264 coding protocol of standard, the mode selected is still image quality, the mode of change code check is encoded.