CN105430297A - Automatic control system for conversion from multi-video format to IIDC protocol video format - Google Patents
Automatic control system for conversion from multi-video format to IIDC protocol video format Download PDFInfo
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- CN105430297A CN105430297A CN201510924318.3A CN201510924318A CN105430297A CN 105430297 A CN105430297 A CN 105430297A CN 201510924318 A CN201510924318 A CN 201510924318A CN 105430297 A CN105430297 A CN 105430297A
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Abstract
The invention provides an automatic control system for conversion from a multi-video format to an IIDC video format. In the system, corresponding detecting units are arranged to correspond to multiple video protocols; data and a control signal line of an input video are respectively sent to each detecting unit; if one video protocol matches with the input video, the detecting unit corresponding to the protocol generates a high-level enabling signal CE to drive a corresponding collecting unit; meanwhile, other detecting units generate low levels to enable collecting units corresponding to a back-end to be in a reset state; and a multiplexer switch controller regards the CE output by each detecting unit as a control semaphore, regards video data stream collected by each collecting unit as an input, and selectively puts through the CE so as to perform subsequent caching and zooming processing operations for the collected video data streams which correspond to a high level and convert different video data frames into data in the IIDC video format.
Description
Technical field
The invention belongs to Video processing, graph image field, be specifically related to the control system of one kind of multiple video formats to IIDC protocol video format conversion.
Background technology
IIDC is for real-time video transmission and fixed IEEE1394 (hereinafter referred to as 1394) data format.
Because IIDC supports multiple resolution and frame per second, and 1394 have transmission rate high, support hot plug and support point-to-point transmission, even in 1394 systems, the equipment of various speed such as can to coexist when not affecting communication speed at the advantage, and vehicle-mounted at some, airborne and civil area has a wide range of applications.Due to existing vision sensor output video agreement and resolution different, and transmission can not networking, does not support hot plug etc., all needs different video formats to be converted into the 1024X768 resolution of IIDC form, the data format of 60Hz frame frequency under many scenes.
Along with electronic technology, the development of large scale integrated circuit, adopt field programmable gate array (FPGA) to realize Digital Signal Processing at configurability, there is many advantages the aspects such as stability.The various video form studied based on FPGA has broad application prospects to the automatic conversion and control scheme meeting IIDC video format.At present, also there is not the chip of many video formats to IIDC video format conversion.
Summary of the invention
The present invention proposes the automatic control system of a kind of many video formats based on FPGA to IIDC protocol video format conversion.
Technical scheme of the present invention is as follows:
Many video formats, to the automatic control system of IIDC protocol video format conversion, is characterized in that, comprising:
Protocol detection module, sets up and has various video protocol database, compare analysis, mate input video;
Video acquisition module, gathers the input video mating and determine;
On-off controller, the match information drawn using protocol detection module as control signal, by the vision signal controlling output video acquisition module and send;
Video data processing module, be provided with frame of video double buffering, the mode of ping-pong operation is adopted to turn line by line and bilinear interpolation algorithm, different video data frames to be converted into the data of IIDC video format carrying out interlacing stored in video data frame in buffering area A and buffering area B successively; Again by the data of IIDC video format according to the mode of ping-pong operation successively stored in buffering area C and buffering area D;
Send control module, the video data in buffering area C and buffering area D is exported according to IIDC video format.
On the basis of above scheme, the present invention has also done following optimization further:
Correspond to various video agreement in protocol detection module and be provided with corresponding detecting unit, be provided with in described video acquisition module and these detecting units collecting unit one to one;
The data of input video and control signal wire send into each detecting unit respectively, if certain video protocols coupling input video, the detecting unit then corresponding to this kind of agreement produces high level enable signal CE, drive collecting unit corresponding in described video acquisition module, the collecting unit that other detecting units generation low level makes its rear end corresponding is simultaneously in reset mode.
Each detecting unit, by the time interval of an analysis full frame images expert field sync signal and the Changing Pattern of blanking zone video data, judges whether input video belongs to certain video protocols.
On-off controller is a multidiameter option switch controller, and the CE exported with each detecting unit is control signal amount, and the video data stream that each collecting unit gathers is input, and gating CE is that the collection video data stream that high level is corresponding carries out follow-up caching.
The valid pixel of adjacent two two field pictures that buffering area A and buffering area B buffer memory arrive continuously, ping-pong operation is carried out to buffering area A and buffering area B, when current frame image being filled into buffering area A, adopt interlacing to turn line by line to the previous frame image of buffer memory in the B of buffering area and bilinear interpolation algorithm is converted into 1024X768 resolution sizes, and be filled into and send in the C of buffering area; At subsequent time period, next frame image buffer storage is entered buffering area B and bilinear interpolation process is carried out to the picture frame in the A of buffering area and stored in transmission buffering area D; Video data in final buffer district C and buffering area D is according to IIDC1024X768 resolution 60Hz frame-rate video formatted output.
The present invention can the vision signal of the agreement such as Real-time and Dynamic Detection RawRGB, BT.656, BT.709 and SMPTE273, automatically Video processing is completed and unified to be converted to the 1024X768, the frame frequency that meet IIDC agreement be 60Hz vision signal, Video Quality Metric is smooth, exports steady and audible.Specifically there is following technique effect:
1, make full use of the feature of 1394 buses, utilize the IIDC data format transmitting video data of 1394, in 1 1394 system not only transmitting video data but also control can be transmitted, and support hot plug.
2, set up the IP kernel that video detects and gathers, greatly can shorten the construction cycle, and can be used in the exploitation of sundry item, rate of code reuse is very high.
3, adopt field programmable gate array (FPGA) to realize the detection of video data frame, coupling, conversion and transmission, can according to application to the detection of the frame of video of input, gather IP kernel and carry out cutting, flexible configuration; FPGA design simultaneously adopts parallel pipeline operation, and real-time is high, and Video Quality Metric is smooth, and it is clear that image exports; Bilinear interpolation algorithm can be revised simultaneously, meet the simple and easy customization of the demand of user's different resolution and different frame per second.
4, IIDC video transmission format is not only applied to airborne, mobile unit and has application prospect wide widely at civil area.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Embodiment
Below in conjunction with Fig. 1, the solution of the present invention is described in further detail.
First, the vision signal of various video protocol database to input by setting up compares analysis, coupling; Vision signal is gathered; Devise frame of video double buffering A and B, adopt the mode of ping-pong operation to carry out interlacing to video data frame in buffering area to turn line by line and bilinear interpolation algorithm, different video data frames to be converted into the 1024X768 meeting IIDC, frame frequency is the video format of 60Hz; After by the data of IIDC video format according to the mode of ping-pong operation stored in buffering area C or D; Finally from buffering area, view data is exported according to IIDC video format, thus achieve IIDC video format 1024X768 resolution, frame frequency is the conversion of 60Hz.
Realize details specific as follows:
A. the detection module for various conventional video protocols (comprising RawRGB, BT.656, BT.709 and SMPTE273) is designed, detection module, by the time interval of an analysis full frame images expert field sync signal and the Changing Pattern of blanking zone video data, judges whether input video belongs to this kind of agreement;
B. the data of input video and control signal wire (HS, VS and DE) are sent into each video protocols detection module respectively, if certain agreement coupling input video, then the detection module of this kind of agreement produces high level enable signal CE, drive the acquisition module of its correspondence, other protocol detection modules generation low level makes video acquisition module corresponding to its rear end place be in reset mode simultaneously;
C. a multidiameter option switch controller is designed, the CE exported with each video protocols detection module is for control signal amount, the video data stream that each video protocols acquisition module gathers is input, and gating CE is that the collection video data stream that high level is corresponding carries out follow-up buffer memory and convergent-divergent process operation;
D. double buffering A and B is designed, the valid pixel of adjacent two two field pictures that buffer memory arrives continuously, ping-pong operation is carried out to buffering area A and B, when current frame image being filled into buffering area A, adopt interlacing to turn line by line to the previous frame image of buffer memory in B and bilinear interpolation algorithm is converted into 1024X768 resolution sizes, and be filled into and send in the C of buffering area; At subsequent time period, next frame image buffer storage is entered buffering area B and bilinear interpolation process is carried out to the picture frame in the A of buffering area and stored in transmission buffering area D;
E. the video data in last double buffering in C and D according to IIDC1024X768 resolution 60Hz frame-rate video formatted output, thus realizes the conversion of input video to the 1024X768 resolution 60Hz of IIDC video format.
Claims (5)
1. video format more than, to the automatic control system of IIDC protocol video format conversion, is characterized in that, comprising:
Protocol detection module, sets up and has various video protocol database, compare analysis, mate input video;
Video acquisition module, gathers the input video mating and determine;
On-off controller, the match information drawn using protocol detection module as control signal, by the vision signal controlling output video acquisition module and send;
Video data processing module, be provided with frame of video double buffering, the mode of ping-pong operation is adopted to turn line by line and bilinear interpolation algorithm, different video data frames to be converted into the data of IIDC video format carrying out interlacing stored in video data frame in buffering area A and buffering area B successively; Again by the data of IIDC video format according to the mode of ping-pong operation successively stored in buffering area C and buffering area D;
Send control module, the video data in buffering area C and buffering area D is exported according to IIDC video format.
2. automatic control system according to claim 1, it is characterized in that: correspond to various video agreement in described protocol detection module and be provided with corresponding detecting unit, be provided with in described video acquisition module and these detecting units collecting unit one to one;
The data of input video and control signal wire send into each detecting unit respectively, if certain video protocols coupling input video, the detecting unit then corresponding to this kind of agreement produces high level enable signal CE, drive collecting unit corresponding in described video acquisition module, the collecting unit that other detecting units generation low level makes its rear end corresponding is simultaneously in reset mode.
3. automatic control system according to claim 2, it is characterized in that: described each detecting unit, by the time interval of an analysis full frame images expert field sync signal and the Changing Pattern of blanking zone video data, judges whether input video belongs to certain video protocols.
4. automatic control system according to claim 2, it is characterized in that: described on-off controller is a multidiameter option switch controller, the CE exported with each detecting unit is control signal amount, the video data stream that each collecting unit gathers is input, and gating CE is that the collection video data stream that high level is corresponding carries out follow-up caching.
5. automatic control system according to claim 1, it is characterized in that: the valid pixel of adjacent two two field pictures that buffering area A and buffering area B buffer memory arrive continuously, ping-pong operation is carried out to buffering area A and buffering area B, when current frame image being filled into buffering area A, adopt interlacing to turn line by line to the previous frame image of buffer memory in the B of buffering area and bilinear interpolation algorithm is converted into 1024X768 resolution sizes, and be filled into and send in the C of buffering area; At subsequent time period, next frame image buffer storage is entered buffering area B and bilinear interpolation process is carried out to the picture frame in the A of buffering area and stored in transmission buffering area D; Video data in final buffer district C and buffering area D is according to IIDC1024X768 resolution 60Hz frame-rate video formatted output.
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