CN104093023A - Vehicle-mounted video compressed transmission method and system - Google Patents
Vehicle-mounted video compressed transmission method and system Download PDFInfo
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- CN104093023A CN104093023A CN201410357858.3A CN201410357858A CN104093023A CN 104093023 A CN104093023 A CN 104093023A CN 201410357858 A CN201410357858 A CN 201410357858A CN 104093023 A CN104093023 A CN 104093023A
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Abstract
The invention discloses a vehicle-mounted video compressed transmission method and system. The method comprises the steps that firstly, a video is divided into a plurality of frames, five to ten frames serve as one unit, and the stacked units are divided into a plurality of equal parts based on a certain division rule; the divided equal parts are compressed with a certain coding rule; the compressed video is transmitted through a wireless network; the received video is decoded and restored according to a certain decoding rule. Accordingly, the number of bytes obtained after compression is small, transmission time is short, transmission consumption is low, and the method confirms to the compressed transmission characteristics of the vehicle-mounted equipment video. The invention further discloses the vehicle-mounted video compressed transmission system. The vehicle-mounted video compressed transmission system comprises a camera head and a vehicle-mounted video terminal, and a client side can obtain video information on a video memorizer in the vehicle-mounted video terminal through a video server. The vehicle-mounted video terminal comprises a video receiver, a central processing unit, the video memorizer and a wireless communication module.
Description
Technical field
The present invention relates to video compression and transmission field, particularly a kind of vehicle-mounted video compression transmission method and system.
Background technology
Flourish along with public transport, passenger traffic, transport undertaking, safety and the management of vehicle for public transport operation personnel in operation process is also more and more taken seriously, and gives us passenger safety, vehicle management brings a lot of challenges simultaneously.In today of information technology fast development, being used widely of wireless network, and the development of digital video compaction technique, make one for moving vehicle and have management system safe, long-range, instant, science and become the inevitable of vehicle safety management; Now urban life from not taxi stolen, taxi is robbed, even taxi driver is killed, be kidnaped, etc. case be also into industry persistent ailment.Case is suffered from does not mostly have evidence on the other hand to assist in time to solve a case, and does not have more advanced means to stop the generation of case yet; Passenger train is installed the human pilot bad behaviors such as the effective anti-overload of video monitoring system, fatigue driving, hypervelocity.Vehicular video monitoring system has been broken traditional cameras can not Internet Transmission or the slow drawback of transmission speed, for people's life safety, national wealth (enterprise) provide guarantee.Vehicular video monitoring system is for improving service for business management level, realize the automation of vehicle scheduling, safety supervision, the standardization of vehicle operating, maintenance, the sequencing of emergency processing, and then expand the living space of enterprise, improving self competitiveness provides sound assurance.
For above situation, wireless vehicle-mounted video monitor system is arisen at the historic moment, wireless vehicle-mounted video monitor system can real time record vehicle-surroundings situation, play certain anti-overload, fatigue driving, hypervelocity, antitheft, anti-ly pound, pick-proof effect, in meeting accident, the monitoring video of vehicle-mounted monitoring system can also provide strong material for investigation work.But because video takes up space greatly, the flow that transmission consumes is also larger, transmission speed is slow, meets emergency on occasion, can not meet the requirement of real time record periphery situation.All just to occur at short notice because unexpected, if compression method is bad, compression speed is slow, video after compression takes up space greatly, transmits the required time also just very long, so, be subject to the restriction of the speed of service of Vehicular video terminal hardware own, may be in video information also not in end of transmission, just standby damage of supervisory control system, the monitor message of the scene of the accident will be lost.
The method of image compression is a lot of at present, and its sorting technique is different and variant according to starting point.Between image after rebuilding according to decompress(ion) and original image, whether have error, image compression is divided into error-free encoding and has the large class of error coding two.What in lossless coding, delete is only the data of redundancy in view data, without any distortion, is usually used in copying, preserving the very precious occasion such as history, cultural relic images through the image of decoding and rebuilding and original image; Lossy coding refers to that the image of decoding and rebuilding has distortion compared with original image, can not restore accurately, but visual effect is basic identical, and be the coding method that realizes high compression ratio, this class coding method of the normal employing such as Digital Television, image transmitting and multimedia.Method for compressing image: Lossless Compression, huffman coding, run-length encoding, arithmetic coding, lossy compression method, predictive coding, transition coding, other codings.Above algorithm common feature be the equipment of not considering executing arithmetic, with transmission, car-mounted terminal uses monolithic programing operation limited speed, be subject to the restriction of Internet Transmission when mobile unit wireless transmission, car-mounted terminal more needs the compression and a kind of more easy algorithm of transmission of image simultaneously.
Summary of the invention
For above problem, the invention provides a kind of vehicle-mounted video compression transmission method and system, for realizing the object of the invention, the technical scheme of employing is:
A kind of vehicle-mounted video compression transmission method, is characterized in that, comprises following content:
A. video divides some frames;
B. by overlapping each frame in steps A, and be divided into some equal portions;
C. some frames in step B being divided to the equal portions that obtain compresses;
D. the video after compression in step C is transmitted;
E. the reduction of the video receiving being decoded.
Further, an image compresses transmission taking 5-10 frame as a unit.
Further, the partition principle in step B for meet each frame of video overlapping and cut apart after the pixel difference minimum of the mutual correspondence that comprises in the equal portions that obtain.
Further, the equal portions that obtain in step B compress according to following coding rule: overlapping equal portions fritter pixel is identical, and strange, even pixel fritter is identical.
Further, the decoding rule in step e is that the video quality of checking as required requires to select video frame number, so that coding rule in step C is reverse, the frame of video of selecting is decoded.
Further, the transmission means in step D is 3G or 4G wireless network.
A kind of vehicle-mounted video compression transmission system, comprises camera head and Vehicular video terminal, it is characterized in that: Vehicular video terminal comprises video receiver, central processing unit, video memory, wireless communication module; Client is obtained the video information in video memory in Vehicular video terminal by video server.
Beneficial effect of the present invention:
1. video is divided into some frames, then is divided into after some equal portions with 5-10 frame, and identical point is more, and its difference is less, and the byte after compression is just few, and compression efficiency is high, and the compressed file obtaining after overcompression takes up space little.
2. compressed file takes up space littlely, and efficiency of transmission is improved, and the transmission time is short, and transmission loss is few.
3. because compression is equal portions divides, decoding is also to decode with same equal portions, arranges so compression can be considered to pay with decoding time, saves computing time, reduces hardware consumption, extends hardware useful life.
4. whole compression transmission decode procedure meets video encoding and decoding standard.
5. vehicle-mounted video compression transmission method of the present invention is for vehicle-mounted video compression transmission system, and the central processing element operating efficiency in system is high, and is applicable to long steady operation.
Brief description of the drawings
Fig. 1: Video coding compression transmitting procedure block diagram.
Fig. 2: vehicle-mounted video compression transmission system structure chart.
Embodiment
Vehicle-mounted video compression transmission method of the present invention, first divides video some frames; Then by overlapping each frame, and be divided into some equal portions; Then the equal portions that division obtained compress; Then the video after compression is transmitted; Connect the reduction of finally video receiving being decoded.Under normal circumstances, an image compresses transmission taking 5-10 frame as a unit.Partition principle for meet each frame of video overlapping and cut apart after the pixel difference minimum of the mutual correspondence that comprises in the equal portions that obtain.The equal portions that obtain compress according to following coding rule: overlapping equal portions fritter pixel is identical, and strange, even pixel fritter is identical.Decoding rule is that the video quality of checking as required requires to select video frame number, so that coding rule is reverse, the frame of video of selecting is decoded.Transmission means is 3G or 4G wireless network.The present invention also provides a kind of vehicle-mounted video compression transmission system, comprises camera head and Vehicular video terminal, and Vehicular video terminal comprises video receiver, central processing unit, video memory, wireless communication module; Client is obtained the video information in video memory in Vehicular video terminal by video server.
In the time that automobile meets accident, by the video compression transmission method in the present invention, the video after compression takes up space little, in a short period of time, video information when automobile real-time monitoring system just can accident occur sends to client, as scene of the accident data.
Claims (7)
1. a vehicle-mounted video compression transmission method, is characterized in that, comprises following content:
A. video divides some frames;
B. by overlapping each frame in steps A, and be divided into some equal portions;
C. some frames in step B being divided to the equal portions that obtain compresses;
D. the video after compression in step C is transmitted;
E. the reduction of the video receiving being decoded.
2. a kind of vehicle-mounted video compression transmission method according to claim 1, is characterized in that: an image compresses transmission taking 5-10 frame as a unit.
3. a kind of vehicle-mounted video compression transmission method according to claim 1, is characterized in that: the partition principle in step B for meet each frame of video overlapping and cut apart after the pixel difference minimum of the mutual correspondence that comprises in the equal portions that obtain.
4. according to a kind of vehicle-mounted video compression transmission method described in claim 1 or 3, it is characterized in that: the equal portions that obtain in step B compress according to following coding rule: overlapping equal portions fritter pixel is identical, and strange, even pixel fritter is identical.
5. a kind of vehicle-mounted video compression transmission method according to claim 4, it is characterized in that: the decoding rule in step e is that the video quality of checking as required requires to select video frame number, so that coding rule in step C is reverse, the frame of video of selecting is decoded.
6. a kind of vehicle-mounted video compression transmission method according to claim 1, is characterized in that: the transmission means in step D is 3G or 4G wireless network.
7. a vehicle-mounted video compression transmission system, comprises camera head and Vehicular video terminal, it is characterized in that: Vehicular video terminal comprises video receiver, central processing unit, video memory, wireless communication module; Client is obtained the video information in video memory in Vehicular video terminal by video server.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410357858.3A CN104093023A (en) | 2014-07-25 | 2014-07-25 | Vehicle-mounted video compressed transmission method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410357858.3A CN104093023A (en) | 2014-07-25 | 2014-07-25 | Vehicle-mounted video compressed transmission method and system |
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| CN104093023A true CN104093023A (en) | 2014-10-08 |
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| CN201410357858.3A Pending CN104093023A (en) | 2014-07-25 | 2014-07-25 | Vehicle-mounted video compressed transmission method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105282512A (en) * | 2015-10-23 | 2016-01-27 | 中科动力（福建）新能源汽车有限公司 | Safety monitoring method and system for electric automobile |
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| CN102348115A (en) * | 2010-08-02 | 2012-02-08 | 南京壹进制信息技术有限公司 | Method and device for removing redundant images from video |
| CN102946530A (en) * | 2012-11-27 | 2013-02-27 | 北京恒华伟业科技股份有限公司 | Video transmission method and device and video playing method and device |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1078591A (en) * | 1992-02-08 | 1993-11-17 | 三星电子株式会社 | Motion forecast method and device thereof |
| CN1574964A (en) * | 2003-06-04 | 2005-02-02 | 三星电子株式会社 | Method and device for compressing image data |
| CN1688157A (en) * | 2005-06-13 | 2005-10-26 | 北京中星微电子有限公司 | Sports detecting method |
| CN1731859A (en) * | 2005-09-09 | 2006-02-08 | 北京中星微电子有限公司 | Video compression method and video system using the method |
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Application publication date: 20141008 |