CN107360384A - A kind of high-speed video collecting and transmitting method - Google Patents
A kind of high-speed video collecting and transmitting method Download PDFInfo
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- CN107360384A CN107360384A CN201710528455.4A CN201710528455A CN107360384A CN 107360384 A CN107360384 A CN 107360384A CN 201710528455 A CN201710528455 A CN 201710528455A CN 107360384 A CN107360384 A CN 107360384A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
Abstract
The invention provides a kind of high-speed video collecting and transmitting method, comprise the following steps：1) high speed image of noncanonical format is gathered；The high speed image of noncanonical format is 640*480@K1Fps, high speed image form are YCbCr；Wherein, K1=200 or 400；2) high speed image of noncanonical format is mapped to the HD video data of reference format by the mapping ruler of setting；The HD video data of the reference format are 1920*1080@K2Fps, high-definition image form are YCbCr；Wherein:K2=30 or 60；3) by high speed image data of the demapping rule set by the HD video data recovery of reference format as noncanonical format；4) high speed image data of the noncanonical format recovered is subjected to HEVC/H265 compressed encodings；5) compressed bit stream of the high speed image of noncanonical format is exported.By the lossless high-speed transfer for the high speed image long range that the method achieve noncanonical format.
Description
Technical field
The invention belongs to information data transmission technical field, and in particular to a kind of high-speed video collecting and transmitting method.
Background technology
, it is necessary to shoot and recorded using special high-speed camera in some special occasions or some special fields
Journey, such as：When shooting the fast-changing scene such as moment of object blast, it is necessary to by view data Long Distant Transmit to rear end
Receiving device received and data processing.The picture format of these high-speed cameras output is typically off-gauge, not
It is common SD, high definition or super clear reference format, conventional digital video transmitter, receiver can not be used to be passed
It is defeated.
During digital camera output image, conventional interface shape includes USB, 1394 (fire wire), GE
(Ethernet), LVDS, CameraLink etc..Wherein, USB interface shows especially suitable for camera is directly connected into computer
Show, various resolution ratio and frame frequency can be supported, be usually used in various SDs, high-definition camera.1394 interface transmission rates are high, take
Cpu resource is few, working stability, is also widely used on digital camera.Gigabit Ethernet (GE) transmission rate is high, price
It is cheap, it is used in various resolution ratio and frame frequency.CameraLink interfaces are a kind of bus types most fast in current industrial camera
Type, high-resolution high-speed area array camera is generally used for, or on line-scan digital camera.
USB2.0 interface rates are relatively low, and CPU participative managements are needed in transmitting procedure, take and consumption resource is larger, pass
Defeated distance is near, and signal is easily decayed.USB3.0 speed has very big lifting, but need CPU processing and transmission range it is near the shortcomings that
Still do not solve.
1394 interfacings are relative complex, and the popularity rate of interface is not high, slowly by market.
Gigabit Ethernet requires the high speed envelope that transmitting terminal, the receiving terminal of image are required for CPU to participate in carrying out ICP/IP protocol
Bag/solution package processing is, it is necessary to which PHY devices, transformer chip, RJ45 interfaces, volume are relatively large corresponding to connecting.
LVDS EBIs can not support the transmission of high-speed data, and effective transmission range is shorter.
Camera Link interface volumes are larger while expensive, and transmission range is short.
Therefore the technical problem for being badly in need of solving now is how to use a kind of simple, low cost device by high-speed video
Image is transferred on the receiving device of rear end from remote high-speed camera and handled.
The content of the invention
, will be non-standard the present invention relates to a kind of high-speed video collecting and transmitting method in order to solve the problems, such as in background technology
High-speed video images realize the lossless high-speed transfer of long range by way of format conversion.
The present invention concrete principle be：
The present invention is intended to provide a kind of high-speed video collecting and transmitting method that can support long-distance transmissions, using will be nonstandard
The video of quasiconfiguaration is mapped to the method being transmitted again after the video format of standard, by 640*480@K1Fps high-speed video
It is mapped to the 1920*1080p@K for meeting BT.1120 standards2In fps HD video forms, then the data by HD video form
Demapping is carried out, recovers 640*480@K1Coding output is carried out after fps high-speed video datas again.
The present invention concrete technical scheme be：
The invention provides a kind of high-speed video collecting and transmitting method, it is characterised in that comprises the following steps：
1) high speed image of noncanonical format is gathered；
The high speed image of the noncanonical format is 640*480@K1Fps, high speed image form are YCbCr；Wherein, K1=
200 or 400；
2) high speed image of noncanonical format is mapped to the HD video data of reference format by the mapping ruler of setting；
The HD video data of the reference format are 1920*1080@K2Fps, picture format YCbCr；Wherein:K2=30 or 60；
3) by high speed figure of the demapping rule set by the HD video data recovery of reference format as noncanonical format
As data；
4) high speed image data of the noncanonical format recovered is subjected to HEVC/H265 compressed encodings；
5) compressed bit stream of the high speed image of noncanonical format is exported.
Above-mentioned steps 2) in setting mapping ruler be specifically：
A1, define K2Frame meets the transformat of the high clear video image of BT.1120 standards, and the high definition of each frame standard regards
Effective image section is set in the transformat of frequency image, the effective image section is used to fill high speed image data, should
Effective image section amounts to 1920 row and 1080 rows, i.e. 2073600 bytes；
B1, the first character section insertion sequence number byte 0, Ran Houlian in the effective image section of the 1st clear video format of vertical frame dimension
Continuous insertion 1-6 frame high speed images, and numbering is 1~6 respectively, is finally embedded in the preceding 360 row image of the 7th frame high speed image,
And it is 7 to number；
C1, the first character section insertion sequence number byte 1, Ran Houqian in the effective image section of the 2nd clear video format of vertical frame dimension
Enter rear 120 row of the 7th frame high speed image, then be consecutively embedded 8-13 frame high speed images, numbering is 8~13, is finally embedded in the 14th
Preceding 240 row of frame high speed image, and it is 14 to number；
D1, the first character section insertion sequence number byte 2, Ran Houqian in the effective image section of the 3rd clear video format of vertical frame dimension
Enter rear 240 row of the 14th frame high speed image, then be consecutively embedded 15-20 frame high speed images, numbering is that the 15~20, the 3rd vertical frame dimension is clear
Unnecessary byte after the 20th frame 640*480 format-patterns of effective image section receiving of video format is uniformly filled with 00；So far,
In the high speed image effective image section that continuous 20 vertical frame dimension speed loading images are just entered to the continuous clear video format of 3 vertical frame dimension；
E1, repeat step B1~D1, until by remaining 21~K1Vertical frame dimension speed loading images are to 4~K2Row high definition regards
In the effective image section of frequency form.
Above-mentioned steps 3) in setting demapping rule be specifically：
A2, data in the effective image section of the 1st clear video format of vertical frame dimension are obtained, judge first character section, if the
One byte is 0 execution step B2, and step C2 is performed if first character section is 1, and step is performed if first character section is 2
D2；
B2, it is continuously withdrawn 1-6 frame high speed images in the effective image section of the 1st clear video format of vertical frame dimension and is directly pressed
Code is reduced the staff, numbering is respectively 1~6, then caches 360 row images before the 7th frame high speed image, is then back to step
A2；
C2, first take out the 2nd clear video format of vertical frame dimension effective image section in the 7th frame high speed image rear 120 row, by it
Compressed encoding is carried out after being spliced with 360 row images before the 7th frame high speed image that is cached in step B2, is then continuously taken again
Go out 8-13 frame high speed images and be compressed coding, frame number is 8~13, and finally before the 14th frame high speed image 240 advance
Row caching, finally returns to step A2；
D2, first take out the 3rd clear video format of vertical frame dimension effective image section in the 14th frame high speed image rear 240 row, with
The preceding 240 row image of the 14th frame high speed image cached in step C2 carries out compressed encoding after being spliced, and is then continuously withdrawn
15th~20 frame high speed image is compressed coding and prepared, frame number 15~20, remaining byte will abandon, and finally return to below
Step A2；
E2, repeat step A2~D2, until by K2Data in the effective image section of the clear video format of vertical frame dimension all connect
Harvest complete.
The beneficial effects of the invention are as follows：
The high-speed video transmission method used in the present invention, the high speed image of noncanonical format is passed through in whole process
After collection, mapping, demapping, transmission, compression, the integrality of original video can not only be kept, correct complete documentation output
Initial data, while realize the long-range Lossless transport of high-speed video data.
Brief description of the drawings
Fig. 1 is the system framework figure of the present invention；
Fig. 2 is that the 1st frame high clear video image maps schematic diagram；
Fig. 3 is that the 2nd frame high clear video image maps schematic diagram；
Fig. 4 is that the 3rd frame high clear video image maps schematic diagram；
Fig. 5 is data demapping flow chart.
Embodiment
Referring to Fig. 1, provided in the present embodiment a kind of high-speed video collecting and transmitting method come to the present invention need it is to be protected
Transmission method is described in more details：
The system includes data sending terminal and receiving terminal two parts, and transmitting terminal and receiving terminal are mounted on SDI interfaces；Send
Data are transmitted by SDI coaxial cables with receiving terminal in end；
Wherein, transmitting terminal includes high speed imaging sensor and the video acquisition module and number that are integrated on fpga chip
According to mapping block；
Receiving terminal includes data De-mapping module, video encoding module and the video frequency output mould being integrated on ARM chips
Block；
Wherein：High speed imaging sensor is used for the high speed image for exporting noncanonical format；The high speed of the noncanonical format
Image is 640*480@K1Fps, high speed image form are YCbCr；Wherein, K1=200 or 400；
The high speed image of the noncanonical format of video acquisition module collection high speed imaging sensor output, is then sent to number
According to mapping block；
Data mapping module is responsible for the high speed image of noncanonical format being mapped to reference format by the mapping ruler of setting
HD video data；The HD video data of the reference format are 1920*1080@K2Fps, picture format YCbCr；Its
In:K2=30 or 60；
Data De-mapping module is by the demapping rule of setting by the HD video data recovery of reference format into 640*
480@K1Fps videos；
The 640*480@K that video encoding module will recover1Fps videos carry out HEVC/H265 compressed encodings；
Video Output Modules are used to export 640*480@K1Fps compressed bit stream.
Transmission method based on the system present invention comprises the following steps that：
Step 1) high speed graphic sensor exports noncanonical format high speed image data and sent by video acquisition module
To data mapping module；
The high speed image of the noncanonical format is 640*480@K1Fps, high speed image source format are YCbCr；Wherein, K1
=200 or 400；
The high speed image of noncanonical format is mapped to reticle by step 2) data mapping module by the mapping ruler of setting
The HD video data of formula；The HD video data of the reference format are 1920*1080@K2Fps, picture format YCbCr；
Wherein:K2=30 or 60；
Mapping ruler (K in the present embodiment specific as follows1=400, K2=60)：
A1,60 frames meet the transformat of the high clear video image of BT.1120 standards defined in data mapping module, often
Effective image section is set in the transformat of the high clear video image of one frame standard, the effective image section is used to fill
High speed image data, the effective image section amount to 1920 row and 1080 rows, i.e. 2073600 bytes；
As shown in Fig. 2 B1, the first character section insertion sequence number word in the effective image section of the 1st clear video format of vertical frame dimension
Section 0, then continuous embedded 1-6 frame high speed images, and numbering is 1~6 respectively, before being finally embedded in the 7th frame high speed image
360 row images, and it is 7 to number；
As shown in figure 3, C1, the first character section insertion sequence number word in the effective image section of the 2nd clear video format of vertical frame dimension
Section 1, is then inserted into rear 120 row of the 7th frame high speed image, then is consecutively embedded 8-13 frame high speed images, and numbering is 8~13, most
Preceding 240 row of the 14th frame high speed image is embedded in afterwards, and it is 14 to number；
As shown in figure 4, D1, the first character section insertion sequence number word in the effective image section of the 3rd clear video format of vertical frame dimension
Section 2, is then inserted into rear 240 row of the 14th frame high speed image, then is consecutively embedded 15-20 frame high speed images, and numbering is 15~20,
The effective image section of the 3rd clear video format of vertical frame dimension accommodates the unified filling of unnecessary byte after the 20th frame 640*480 format-patterns
For 00；So far, continuous 20 vertical frame dimension speed loading images are just entered to the high speed image effective image of the continuous clear video format of 3 vertical frame dimension
In section；
E1, repeat step B1~D1, until by remaining 21st~400 vertical frame dimension speed loading images to the 4th~60 row high definition
In the effective image section of video format.
The HD video data of reference format are delivered to receiving terminal by step 3) transmitting terminal by coaxial cable；
The data De-mapping module of step 4) receiving terminal is by the demapping rule of setting by the HD video number of reference format
According to the high speed image data for recovering noncanonical format；
Below in conjunction with the accompanying drawings 5 pairs set forth herein demapping rule (K in the present embodiment is introduced1=400, K2=60)：
A2, data De-mapping module obtain the data in the effective image section of the 1st clear video format of vertical frame dimension, judge first
Individual byte, step B2 is performed if first character section is 0, step C2 is performed if first character section is 1, if first character section
Step D2 is performed for 2；
B2, it is continuously withdrawn 1-6 frame high speed images in the effective image section of the 1st clear video format of vertical frame dimension and is transmitted directly to
Video encoding module, numbering are respectively 1~6, and the preceding 360 row image for then taking out the 7th frame high speed image is cached, and is then returned
Return step A2；
C2, first take out the 2nd clear video format of vertical frame dimension effective image section in the 7th frame high speed image rear 120 row, by it
Video encoding module is sent to after being spliced with 360 row images before the 7th frame high speed image that is cached in step B2, Ran Houzai
It is continuously withdrawn 8-13 frame high speed images and is sent to video encoding module, frame number is 8~13, finally by the 14th frame high speed image
Preceding 240 row cached, finally return to step A2；
D2, first take out the 3rd clear video format of vertical frame dimension effective image section in the 14th frame high speed image rear 240 row, with
The preceding 240 row image of the 14th frame high speed image cached in step C2 is sent to video encoding module after being spliced, Ran Houlian
Continuous the 15th~20 frame high speed image that takes out is sent to video encoding module, frame number 15~20, remaining byte will abandon below,
Finally return to step A2；
E2, repeat step A2~D2, all connect until by the data in the effective image section of the clear video format of 60 vertical frame dimensions
Harvest complete.
Step 5) carries out the high speed image data of the noncanonical format recovered
HEVC/H265 compressed encodings；
The compressed bit stream of the high speed image of step 6) output noncanonical format.
Claims (3)
1. a kind of high-speed video collecting and transmitting method, it is characterised in that comprise the following steps：
1) high speed image of noncanonical format is gathered；
The high speed image of the noncanonical format is 640*480@K1Fps, high speed image form are YCbCr；Wherein, K1=200 or
400；
2) high speed image of noncanonical format is mapped to the HD video data of reference format by the mapping ruler of setting；It is described
The HD video data of reference format are 1920*1080@K2Fps, high-definition image form are YCbCr；Wherein:K2=30 or 60；
3) by high speed image number of the demapping rule set by the HD video data recovery of reference format as noncanonical format
According to；
4) high speed image data of the noncanonical format recovered is subjected to HEVC/H265 compressed encodings；
5) compressed bit stream of the high speed image of noncanonical format is exported.
2. high-speed video collecting and transmitting method according to claim 1, it is characterised in that：Setting reflects in the step 2)
Penetrating rule is specifically：
A1, define K2Frame meets the transformat of the high clear video image of BT.1120 standards, the HD video figure of each frame standard
Effective image section is set in the transformat of picture, the effective image section is used to fill high speed image data, and this is effective
Image section amounts to 1920 row and 1080 rows, i.e. 2073600 bytes；
B1, the first character section insertion sequence number byte 0 in the effective image section of the 1st clear video format of vertical frame dimension, then continuously
Embedded 1-6 frame high speed images, and numbering is 1~6 respectively, is finally embedded in the preceding 360 row image of the 7th frame high speed image, and compile
Number be 7；
C1, the first character section insertion sequence number byte 1 in the effective image section of the 2nd clear video format of vertical frame dimension, are then inserted into the 7th
Rear 120 row of frame high speed image, then 8-13 frame high speed images are consecutively embedded, numbering is 8~13, is finally embedded in the 14th vertical frame dimension speed
Preceding 240 row of image, and it is 14 to number；
D1, the first character section insertion sequence number byte 2 in the effective image section of the 3rd clear video format of vertical frame dimension, it is then inserted into the
Rear 240 row of 14 frame high speed images, then 15-20 frame high speed images are consecutively embedded, numbering is the 15~20, the 3rd frame HD video
Unnecessary byte after the 20th frame 640*480 format-patterns of effective image section receiving of form is uniformly filled with 00；So far, just will
Continuous 20 vertical frame dimension speed loading images enter in the effective image section of the continuous clear video format of 3 vertical frame dimension；
E1, repeat step B1~D1, until by remaining 21~K1Vertical frame dimension speed loading images are to 4~K2Row HD video lattice
In the effective image section of formula.
3. high-speed video collecting and transmitting method according to claim 1, it is characterised in that：The solution of setting in the step 3)
Mapping ruler is specifically：
A2, obtain the 1st clear video format of vertical frame dimension effective image section in data, judge first character section, if first
Byte is 0 execution step B2, and step C2 is performed if first character section is 1, and step D2 is performed if first character section is 2；
B2, it is continuously withdrawn 1-6 frames high speed image in the effective image section of the 1st clear video format of vertical frame dimension and is directly compressed volume
Code, numbering are respectively 1~6, then cache 360 row images before the 7th frame high speed image, are then back to step A2；
C2, first take out the 2nd clear video format of vertical frame dimension effective image section in the 7th frame high speed image rear 120 row, by itself and step
The preceding 360 row image of the 7th frame high speed image cached in rapid B2 carries out compressed encoding after carrying out sequential concatenation, then continuously takes again
Go out 8-13 frame high speed images and be compressed coding, frame number is 8~13, finally takes out preceding 240 row of the 14th frame high speed image
Cached, finally return to step A2；
D2, first take out the 3rd clear video format of vertical frame dimension effective image section in the 14th frame high speed image rear 240 row, with step
The preceding 240 row image of the 14th frame high speed image cached in C2 carries out compressed encoding after carrying out sequential concatenation, is then continuously withdrawn
15th~20 frame high speed image is compressed coding, frame number 15~20, remaining byte will abandon below, and finally return to step
A2；
E2, repeat step A2~D2, until by K2Data in the effective image section of the clear video format of vertical frame dimension have all received
Finish.
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