CN102984506A - 3G-SDI/DVI portable video signal collecting method - Google Patents
3G-SDI/DVI portable video signal collecting method Download PDFInfo
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Abstract
The invention discloses a 3G-SDI/DVI (3Gbps-Serial Digital Interface/Digital Video Interface) portable video signal collecting method which comprises the following steps of 1) sending location information of a video frame where a parallel video signal and a video stream are located to a caching module, 2) calculating an internal memory address, conducting circulation storing, and sending the parallel video signal to a frame control coding module, 3) coding and outputting the parallel video signal to a DVI coding chip directly, and monitoring each frame of the parallel video signal, 4) sending the parallel video signal in the current internal memory to a processor module with a file system when a specific frame or a problematic frame is monitored, and 5) sending the parallel video signal to a static storing module for storing. The method has the benefits that as an SDI signal is converted to a DVI signal to facilitate analyzing, a video image is analyzed in a static picture by setting slow video playing and a static frame, a specific picture or a video can be stored to the static storing module such as an SD (Secure Digital) card in real time.
Description
Technical field
The present invention relates to the video acquisition analysis field, more particularly, relate to a kind of serial digital signal of 3G-SDI(3Gbps transmission rate) and the DVI(digital visual interface) acquisition method of portable high-definition digital video signal.
Background technology
At present, in China's field of broadcast televisions, 3G-SDI signal application trend is originally brighter and clearer, the equipment of the compatible 3G-SDI signal of the release that the equipment supplier can race against time oneself.When using, tend to occur some unexpected wrong effects behind the omnifarious equipment cascading, these phenomenons are often written in water, can't pounce on and catch, cause can't problem analysis reason, thereby can not deal with problems normally.The attendant of equipment is not the provider of equipment, more is not the equipment research staff, when pinpointing the problems, and good problem identificatioin place.And the data volume of 3G-SDI/DVI signal is huge, in the huge frame of video of data volume, is difficult to find out particular frame or problem frame and particular frame or problem frame single frames are extracted.
Therefore need a kind of video signal collective method, the method can without computer, without the special occasions monitor video signal of external power supply, after vision signal goes wrong effect, can will be analyzed to the backstage after the storage of problem video flowing, perhaps transfer the technical staff to, in order to deal with problems.
Summary of the invention
The present invention is directed to the proposition of above problem, and develop a kind of 3G-SDI/DVI portable video signal acquisition method.
A kind of 3G-SDI/DVI portable video signal acquisition method is characterized in that, comprise the storing step of particular frame or problem frame, step is as follows:
1) the video parsing module carries out equilibrium treatment to the SDI vision signal of receiving terminal, serial video signal after the equilibrium is converted to parallel video signal, and obtain the positional information of video flowing place frame of video, then parallel video signal is sent to cache module with the positional information of video flowing place frame of video;
2) after cache module is calculated memory write address according to the positional information of video flowing place frame of video and self stored parameter, with the parallel video signal storage that circulates, and parallel video signal is sent to frame control-register code module;
3) frame control-register code module will output to the DVI coding chip after the parallel video signal direct coding from cache module, and each frame of parallel video signal is monitored;
4) when monitoring particular frame or problem frame, the parallel video signal in the current internal memory is sent to the processor module of tape file system by man-machine interface control cache module;
5) processor module of tape file system is sent to the static storage module with parallel video signal and stores.
Method of the present invention also comprises the analytical procedure of particular frame or problem frame, and step is as follows:
6) by the processor module of man-machine interface control tape file system the parallel video signal of storing in the static storage module is read according to rule, and stored in the internal memory of cache module;
7) cache module sends parallel video signal with the form of frame to frame control-register code module according to the parameters of frame control-register code module;
8) frame control-register code module sends to parallel video signal in the DVI coding chip and exports.
Also comprise step in the step 1) of the present invention: parallel video signal is carried out being sent to cache module after the bit width conversion with the positional information of video flowing place frame of video, the bit width conversion rule is as follows: the internal storage data bit wide of establishing in the cache module is a, the data bit width of parallel video signal is b, getting c group parallel video signal stores in d the memory address, wherein, c, d are two remainders of the common multiple of a, b, and c＞d.
In the step 8) of the present invention, frame control-register code module adopts the mode of times frame, frame-skipping or quiet frame that parallel video signal is sent in the DVI coding chip and exports.
Implement the present invention and have following beneficial effect: (1) utilizes the internal memory circulation storage 3G-SDI/DVI vision signal in the cache module, and by displaying video the 3G-SDI/DVI vision signal in the internal memory is monitored, when finding particular frame or problem frame, store the 3G-SDI/DVI vision signal in the current internal memory into the static storage module, so that technical staff's later stage is analyzed by the 3G-SDI/DVI vision signal in the static storage module is taken out; (2) by parallel video signal is carried out being sent to cache module after the bit width conversion with the positional information of video flowing place frame of video, avoid the waste of memory headroom; (3) adopt the mode of times frame, frame-skipping or quiet frame that parallel video signal is sent in the DVI coding chip by control frame control-register code module and export so that the technical staff by put slowly, F.F. or quiet frame better analyze particular frame or problem frame; (4) display device of sdi signal is used does not have the DVI display device extensive, we change into the DVI signal with sdi signal, make things convenient for the staff to analyze whenever and wherever possible, pounce on the processing of catching in order to realize each frame, operating personnel can be by setting so that video is put and quiet frame slowly, thereby in static picture, analyze video image, can the specific picture of real-time storage or video to the static storage module.
Description of drawings
Fig. 1 is the hardware configuration schematic diagram of realizing an embodiment of 3G-SDI/DVI portable video signal acquisition method of the present invention;
Fig. 2 is the method flow diagram of bit width conversion of an embodiment of 3G-SDI/DVI portable video signal acquisition method of the present invention;
Fig. 3 is the hardware system figure that realizes an embodiment of 3G-SDI/DVI portable video signal acquisition method of the present invention.
Embodiment
The invention provides a kind of 3G-SDI/DVI portable video signal acquisition method, the method can be carried out the collection analysis buffer memory to 3Gbps high-definition digital video/audio signal, and support the HD(high definition) digital video signal and SD(single-definition) digital video signal, when the problem video image occured, collecting device stored the data in the buffer memory in the static storage module into.Can pass through DVI playback output function problem analysis video afterwards, also the problem video data in the static storage module can be copied in the computer and analyze.
Fig. 1 is the hardware configuration schematic diagram of realizing an embodiment of 3G-SDI/DVI portable video signal acquisition method of the present invention, as shown in the figure.
The hardware configuration of realizing 3G-SDI/DVI portable video signal acquisition method of the present invention comprises video parsing module, cache module, frame control-register code module, the processor module of tape file system, static storage module, wherein, the processor module of video parsing module, frame control-register code module, tape file system all is connected with cache module, and the static storage module is by the processor module domination of tape file system.The function of modules is as follows respectively:
The video parsing module is used for the SDI vision signal of receiving terminal is carried out equilibrium treatment; Serial video signal after the equilibrium gone here and there and be converted to parallel video signal, and analyze the positional information that video obtains video flowing place frame of video.
Comprise internal memory and Memory Controller Hub in the cache module, be used for the real-time operation of high-speed data is processed, what use in native system is Cyclone IV Series FPGA, use perhaps more that the FPGA of high performance series controls 4G/8G capacity DDR3 internal memory, this module core is the controller of DDR3 internal memory.He processes the frame of video that the video parsing module sends, and calculates present data place memory address, and the storage that circulates also can be read back the data in the internal memory and send to the processor module of tape file system simultaneously.Acquisition module with the SDI vision signal go here and there turn and after, analysis module is with the frame of video ordering of aliging, Memory Controller Hub in the cache module is also said according to the internal memory alignment techniques of self research and development that frame of video is regular and is stored in the memory bar, and the storage that circulates, the length of cache-time depends on the form of size and the SDI vision signal of internal memory, and Memory Controller Hub is according to the stored boundary of agreement video stream format custom video.Guarantee correctly to take out the complete one-frame video data of random time section.
The processor module of tape file system is the control processor of whole equipment, he carries out work by the instruction that man-machine interface obtains, the Video Data Storage that cache module is sent arrives the static storage module, also the file data in the static storage module can be read, and be passed in the cache module and go; The static storage module is with file system, and described file system can be the file system of arbitrary format, such as FAT file system or FAT32 file system or new technology file system etc.
Frame control-register code module, Data Source has two passages, and first passage is that the data direct coding that the video parsing module sends is outputed in the DVI interface, just realizes the premonitoring function; Second passage directly is that cache module is linked to each other, and by calculating the frame address of reading of internal memory, allows cache module transmit frame data in the internal memory according to cycle of frame control-register code module and instruction, speed broadcast and quiet frame that so just can achieve frame.
The static storage module is the place of finally preserving video data, read in order to improve on compatible and the PC, support the file system of arbitrary format, comprise the FAT file system, can video data be write in the hard disk by card reader, simultaneously by tape file system processor module is read and is written in the cache module.
The central principle of method of the present invention is: behind the DVI output video, when former video monitor is pinpointed the problems video, pass through button operation, Memory Controller Hub in the cache module will stop and will write video information in internal memory, the problem Video Data Storage that this section is complete at this moment is in internal memory, Memory Controller Hub takes out the video-frequency band data in the internal memory on the I/O Parallel of the processor module that is submitted to the tape file system according to the order of frame according to time sequencing, the processor module of tape file system stores video flowing in the static storage module into, so that permanent storage.When the problem video flowing is analyzed, only need the DVI output is received on the display of supporting the DVI interface, operating equipment, select playback file, the processor module of tape file system is read the corresponding document in the static storage module on the I/O Parallel that is sent to cache module, Memory Controller Hub will switch to from acquisition channel data on the I/O Parallel will be stored into the internal memory, after storage finishes, the frame number rate that the Memory Controller Hub piece will be set according to the user, frame data to memory bar carry out reading and sending to frame control-register code module, last frame control-register code module sends to data in the DVI coding chip, realizes DVI output.Slowly video image be can in display, see by regulating playback rate, so that the easier problem identificatioin frame of video of operator, and by operation image quiet frame or frame-skipping carried out.
3G-SDI/DVI portable video signal acquisition method of the present invention comprises the storing step of particular frame or problem frame, and step is as follows:
1) the video parsing module carries out equilibrium treatment to the SDI vision signal of receiving terminal, serial video signal after the equilibrium is converted to parallel video signal, and obtain the positional information of video flowing place frame of video, then parallel video signal is sent to cache module with the positional information of video flowing place frame of video;
2) after cache module is calculated memory write address according to the positional information of video flowing place frame of video and self stored parameter, with the parallel video signal storage that circulates, and parallel video signal is sent to frame control-register code module;
3) frame control-register code module will output to the DVI coding chip after the parallel video signal direct coding from cache module, and each frame of parallel video signal is monitored;
4) when monitoring particular frame or problem frame, the parallel video signal in the current internal memory is sent to the processor module of tape file system by man-machine interface control cache module;
5) processor module of tape file system is sent to the static storage module with parallel video signal and stores.
3G-SDI/DVI portable video signal acquisition method of the present invention also comprises the analytical procedure of particular frame or problem frame, and step is as follows:
6) by the processor module of man-machine interface control tape file system the parallel video signal of storing in the static storage module is read according to rule, and stored in the internal memory of cache module;
7) cache module sends parallel video signal with the form of frame to frame control-register code module according to the parameters of frame control-register code module;
8) frame control-register code module sends to parallel video signal in the DVI coding chip and exports.
As the preferred technical solution of the present invention, also comprise step in the step 1): parallel video signal is carried out being sent to cache module after the bit width conversion with the positional information of video flowing place frame of video, the bit width conversion rule is as follows: the internal storage data bit wide of establishing in the cache module is a, the data bit width of parallel video signal is b, getting c group parallel video signal stores in d the memory address, wherein, c, d are two remainders of the common multiple of a, b, and c＞d.
Fig. 2 is the method flow diagram of bit width conversion of an embodiment of 3G-SDI/DVI portable video signal acquisition method of the present invention, as shown in the figure.The SDI vision signal that collects is the 20bit parallel data, directly store in the internal memory and will waste most of memory headroom, after converting 16 groups of 20bit data bit widths to the 320bit buffer memory by clock signal 16x CLK, just 5 integral multiples of memory bandwidth have been become, so the clock signal of utilization (16/5) x CLK is divided into 320bit in the preposition inner FIFO buffer (64bit) that 5 five equilibriums store DDR3 controller (the DDR3 controller is the Memory Controller Hub in the cache module) into, waits for the storage of DDR3 internal memory (the DDR3 internal memory is the internal memory in the cache module).The DDR3 controller directly outputs to rear class inside with the data in the internal memory and goes out in the FIFO buffer (64bit), and rear class bit wide revolving die piece resolves into 8 bytes with the band data of 64bit and sends to controller and wait for static storage; In like manner, controller forms rear class inside that 64bit data send to the DDR3 controller with the data reading of static storage according to per 8 bytes to enter FIFO buffer (64bit) medium to be read.
As the preferred technical solution of the present invention, in the step 8), frame control-register code module adopts the mode of times frame, frame-skipping or quiet frame that parallel video signal is sent in the DVI coding chip and exports, thereby the speed of realizing vision signal is play and the broadcast of quiet frame.
The principle that the speed of vision signal is play and quiet frame is play is as follows:
Controller imports to bus with the file data in the static memory and gets on, Memory Controller Hub with the data on the bus according to the sequential storage of frame in the DDR3 memory bar, wait for that the internal memory that the frame of video control module is sent reads parameter, reads the frame of video in the DDR3 memory bar again.The frame of video control module requires output video frame in the DVI coding chip according to setting.
Fig. 3 is the hardware system figure that realizes an embodiment of 3G-SDI/DVI portable video signal acquisition method of the present invention, as shown in the figure.
The pll clock system carries out clock control to whole hardware system, the video parsing module receives the SDI vision signal by video interface, the video data that frame control-register code module outputs in the DVI coding chip is set form, 1920x1080@60Hz for example, for accomplishing the effect of putting slowly and putting soon and supporting real-time quiet frame function, frame control-register code module adopts the mode of times frame and frame-skipping, namely change the reading times of each frame in the DDR3 internal memory (being shown SO-DIMM204 among the figure) reached slowly and put, in like manner change frame-skipping in the DDR3 internal memory read to reach soon and put.Frame control-register code module obtains the configuration parameter on the Avalon bus, namely play the speed of frame, calculating need to be to broadcast repeat number or the frame-skipping number of each frame, and the frame head address of calculating each frame, and begin video data is counted, when the DDR3 controller reaches full frame with the video data counting, continue to read on the memory address of notifying the DDR3 controller to be transferred to the next frame that need to play.After quiet frame instruction sends to the frame of video control module, the frame of video control module will repeat said process, and keep next frame place DDR3 data address constant, reach the purpose of quiet frame.
In this example, realization hardware of the present invention uses outside high speed DDR3 internal memory (large capacity internal memory), can store the full HD digital of digital video data up to the 3Gbps transmission rate, the capacity of DDR3 internal memory has directly determined to gather the length of SDI video, we adopt the highest storage SD of 4G capacity SO-DIMM 204P DDR3 memory bar SD up to 121 seconds, HD-SDI was up to 22 seconds, and the 3G signal also can reach 11 seconds, and can improve by the cascade system of DDR3 these numerical value.
In the present embodiment, the data storage in video data acquiring stage of the present invention is not with the direct static storage of video data, Memory Controller Hub stores the parallel video datacycle of input in the DDR3 internal memory into, and the video image that in real time broadcast collects in the DVI output interface, when the staff detects the problem image, the video data that processor module by the tape file system will be cached in the internal memory carries out static storage, namely store in the SD card by the SD draw-in groove, reached the purpose of acquisition problems video image.In the present embodiment, the processor module of tape file system is Nois II processor, with file system be the FAT file system, connect synchronous DRAM by the SDRAM draw-in groove.
In the present embodiment, transplanted the FAT file system in the realization hardware of the present invention, all operations system of PC all supports the FAT file system, can copy storage file to computer hard disc by very simple mode and get on.Avoided like this utilizing independent sampling instrument or software, simplified the troublesome operation step.Video image analysis software in the computer can the next data of easier analysis collection.
Adopt frame control play-back technology, read-write rule by the frame in the control internal memory, achieve frame control effect, slowly putting quiet frame function in the realization hardware of the present invention is to provide the most direct analytical method to the analyst, find problem place and quiet frame by putting slowly, carefully analyze the image of each frame, point out more intuitively the problem place.
The present invention is portable set, power consumption and volume depend on System design, system adopts the high Cyclone IV Series FPGA of low-power consumption integrated level, and with all module integrations in this chip, more controller is put among the FPGA, embody like this cost and the low-power consumption advantage of high integration, also reduced the pressure of system's lithium battery, reduced simultaneously the volume and weight of handheld device.
Beneficial effect of the present invention is: utilize memory bar to come the video up to the 3Gbps transmission rate that gathers is carried out circular buffer, this is because the very inaccessible storage speed of other non-volatile memory device, and because the video data volume is huge, so collecting device all can not the mass memory high-speed video stream, and the video data of memory size size has surpassed us and has been used for the video length analyzed.This part buffer memory video segment can be turned according to operator's setting and to store in the static storage module (such as the SD card), realize that Nonvolatile data preserves.The display device of sdi signal is used does not have the DVI display device extensive, we change into the DVI signal with sdi signal, make things convenient for the staff to analyze whenever and wherever possible, pounce on the processing of catching in order to realize each frame, operating personnel can be by setting so that video put slowly and quiet frame, thereby in static picture, analyze video image.The staff can also select to utilize special-purpose video analysis software that the video data in the static storage module is carried out particular analysis.
The above; only be the better embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (4)
1. a 3G-SDI/DVI portable video signal acquisition method is characterized in that, comprise the storing step of particular frame or problem frame, step is as follows:
1) the video parsing module carries out equilibrium treatment to the SDI vision signal of receiving terminal, serial video signal after the equilibrium is converted to parallel video signal, and obtain the positional information of video flowing place frame of video, then parallel video signal is sent to cache module with the positional information of video flowing place frame of video;
2) after cache module is calculated memory write address according to the positional information of video flowing place frame of video and self stored parameter, with the parallel video signal storage that circulates, and parallel video signal is sent to frame control-register code module;
3) frame control-register code module will output to the DVI coding chip after the parallel video signal direct coding from cache module, and each frame of parallel video signal is monitored;
4) when monitoring particular frame or problem frame, the parallel video signal in the current internal memory is sent to the processor module of tape file system by man-machine interface control cache module;
5) processor module of tape file system is sent to the static storage module with parallel video signal and stores.
2. 3G-SDI/DVI portable video signal acquisition method according to claim 1 is characterized in that, also comprise the analytical procedure of particular frame or problem frame, step is as follows:
6) by the processor module of man-machine interface control tape file system the parallel video signal of storing in the static storage module is read according to rule, and stored in the internal memory of cache module;
7) cache module sends parallel video signal with the form of frame to frame control-register code module according to the parameters of frame control-register code module;
8) frame control-register code module sends to parallel video signal in the DVI coding chip and exports.
3. 3G-SDI/DVI portable video signal acquisition method according to claim 1, it is characterized in that, also comprise step in the step 1): parallel video signal is carried out being sent to cache module after the bit width conversion with the positional information of video flowing place frame of video, the bit width conversion rule is as follows: the internal storage data bit wide of establishing in the cache module is a, the data bit width of parallel video signal is b, getting c group parallel video signal stores in d the memory address, wherein, c, d are two remainders of the common multiple of a, b, and c＞d.
4. 3G-SDI/DVI portable video signal acquisition method according to claim 2 is characterized in that, in the step 8), frame control-register code module adopts the mode of times frame, frame-skipping or quiet frame that parallel video signal is sent in the DVI coding chip and exports.
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