CN105187794B - A kind of video monitoring system and the extensive dispatching method of video - Google Patents

A kind of video monitoring system and the extensive dispatching method of video Download PDF

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CN105187794B
CN105187794B CN201510574891.6A CN201510574891A CN105187794B CN 105187794 B CN105187794 B CN 105187794B CN 201510574891 A CN201510574891 A CN 201510574891A CN 105187794 B CN105187794 B CN 105187794B
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video
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display devices
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CN105187794A (en
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刘朔
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Abstract

The present invention relates to a kind of video monitoring system and the extensive dispatching method of video, which includes multiple video acquisition devices, video coding apparatus and video display devices;The video acquisition device is used to gather the video information at preset geographical position and the video information is sent to the video coding apparatus;The video coding apparatus is used to carry out hierarchical coding to the video information of the multiple video acquisition device collection, obtains layered video information after multiple codings corresponding with each video acquisition device;The video coding apparatus is additionally operable to after video request information is received, and layered video information is sent to the video display devices;The video display devices are used to be identified according to video capture device, and the layered video information is included in the three-dimensional geographic information system of correspondence position is identified with the video capture device.The present invention improves the scale that video display devices decoding shows video.

Description

A kind of video monitoring system and the extensive dispatching method of video
Technical field
The present invention relates to three-dimensional geographic information field, more particularly to a kind of video monitoring system and the extensive dispatching method of video.
Background technology
Computer vision field is related to the encoding and decoding of video and the transmission of data.Coding and decoding video refer to digital video into Row compression or decompression.Can layered video encoding and decoding (Scaled Video Coding, SVC) be that one kind can be by video flow point Multiple resolution ratio, the technology of frame per second are segmented into, is H264 video encoding and decoding standards used by current most of video conference devices Extension.SVC is greatly improved error resilience and video quality, and to bandwidth without very high requirement.SVC is widely used in During transmission of video is shown, the efficiency of transmission of video can be improved, so as to improve the overall effect of monitor video system.
Traditional video monitoring is shown in multiple video monitorings in a grid formation based on two dimension in one piece of display Hold, lack corresponding geography information, it is difficult to allow user to be combined into spatial information and two-dimensional video information to come, locus sense It is poor.In addition the two-dimensional video number that can be shown in one piece of display is limited, can not show the video on thousands of roads.
As GIS-Geographic Information System (Geographic Information System, GIS) is in the popularization of engineering field, There occurs huge change for traditional video monitoring mode.GIS is a kind of specific highly important space information system.It is Under the support of computer hardware and software system, to related geographical point in earth top layer (including atmosphere) space all or in part Cloth data are acquired, store, managing, computing, the technological system analyzed, be shown and described.
Video display devices of the prior art can only load several roads to the two-dimentional real-time video on tens tunnels, it is impossible to meet to use Control of the family to global situation.
Therefore, how to improve video display devices decoding and show that the scale of video becomes urgent problem to be solved.
The content of the invention
The technical problems to be solved by the invention are:Video display devices can only load several roads to tens tunnels in the prior art Two-dimensional video, decoding show video scale is smaller the problem of.
In order to solve the above technical problems, one aspect of the present invention proposes a kind of video monitoring system, which includes:
Multiple video acquisition devices, video coding apparatus and video display devices;
The video display devices are used to run three-dimensional geographic information system;
The video acquisition device is used to gather the video information at preset geographical position and send the video information To the video coding apparatus;
The video coding apparatus is used to carry out hierarchical coding to the video information of each video acquisition device collection, Obtain the layered video information after multiple codings corresponding with each video acquisition device;
The video display devices are used for according to the acquisition range of the video acquisition device to the video coding apparatus Send video request information;
The video coding apparatus is additionally operable to after the video request information is received, to the video display devices Send layered video information corresponding with the video request information;
The video display devices are used for the video capture device mark in the layered video information, will be described point Layer video presentation of information is in the three-dimensional geographic information system of correspondence position is identified with the video capture device.
Alternatively, the video display devices are used to be mapped to video display devices according to depending on Intrapyramidal video pel The distance of elemental area or virtual three-dimensional video camera to each video pel in display is asked to the video coding apparatus The layered video information of corresponding resolution and frame per second.
Alternatively, the video display devices are single-frame images for layered video information described in hierarchical decoding, and will be single Two field picture texture mapping is into the three-dimensional geographic information system for identifying correspondence position with the video capture device.
Alternatively, the video display devices are additionally operable to the parameter according to virtual three-dimensional video camera, reject and regard outside centrum Video pel;
The parameter of the virtual three-dimensional video camera includes position, direction and/or the ken, the position of the virtual three-dimensional video camera It is set to regarding the vertex of centrum.
Alternatively, the video display devices are specifically used for successively substituting into the video primitive vertices coordinate regarding centrum The plane equation in six faces, regards inside centrum if each vertex of the video pel is directed toward in each plane regarding centrum Side, then respective vertices described regarding the inside of centrum, otherwise respective vertices described regarding the outside of centrum, reject described in regard vertebra External video pel.
On the other hand, the invention also provides a kind of video is dispatched on a large scale, this method includes:
Multiple video acquisition devices gather the video information at preset geographical positions and are sent to the video information and regard Frequency code device;
Video coding apparatus carries out hierarchical coding to the video information of each video acquisition device collection, obtains and institute State the layered video information after the corresponding multiple codings of each video acquisition device;
Video display devices send video information according to the acquisition range of the video acquisition device to video coding apparatus Solicited message;
Video coding apparatus sends layered video information corresponding with the video request information to video display devices;
Video capture device mark of the video display devices in the layered video information, the layered video is believed Breath is shown in the three-dimensional geographic information system that correspondence position is identified with the video capture device.
Alternatively, the video display devices are sent out according to the acquisition range of the video acquisition device to video coding apparatus Video information solicited message is sent to include:
S301:Judge whether the parameter of virtual three-dimensional video camera changes, in the event of changing, perform S302, otherwise Perform S303;
S302:According to the parameter of virtual three-dimensional video camera, the video pel regarded outside centrum is rejected;
S303:Calculate the elemental area or void being mapped to depending on Intrapyramidal video pel in the display of video display devices Intend three-dimensional camera to the distance of each video pel;
S304:According to the elemental area being mapped to depending on Intrapyramidal video pel in the display of video display devices Or virtual three-dimensional video camera asks corresponding resolution and frame per second to the distance of each video pel to the video coding apparatus Layered video information.
Alternatively, video capture device mark of the video display devices in the layered video information, by institute Stating layered video information and being shown in includes with the three-dimensional geographic information system of video capture device mark correspondence position:
Layered video information described in video display devices hierarchical decoding is single-frame images, and single-frame images texture mapping is arrived In the three-dimensional geographic information system that correspondence position is identified with the video capture device.
Alternatively, the parameter of the virtual three-dimensional video camera includes position, direction and/or the ken, and the virtual three-dimensional is taken the photograph The position of camera is regarding the vertex of centrum.
Alternatively, the video pel rejected outside depending on centrum includes:
The video primitive vertices coordinate is substituted into the plane equation regarding six faces of centrum successively, if the video pel Each vertex the side regarded inside centrum is directed toward in each plane regarding centrum, then respective vertices are regarded in centrum described Portion, otherwise respective vertices reject the video pel outside centrum described regarding the outside of centrum.
The video monitoring system and method for the present invention, which solves video display devices in the prior art and can only load several roads, to be arrived The problem of two-dimensional video on tens tunnels, decoding show the scale is smaller of video, using can layered video encoding and decoding technique, improve Video display devices decoding shows the scale of video.Use of the present invention can carry out the video coding apparatus of hierarchical coding, will regard The video of frequency harvester collection carries out hierarchical coding, the layered video information after multiple codings is obtained, hence in so that video is shown Showing device can select a layered video to be shown from the layered video after multiple codings as needed, such as, differentiate The relatively low layered video of rate, scale is shown so as to effectively improve the video of video display devices.Using proposed by the present invention Video monitoring system, can decode the video that real-time display is more than 500 tunnels at the same time.
Brief description of the drawings
The features and advantages of the present invention can be more clearly understood by reference to attached drawing, attached drawing is schematically without that should manage Solve to carry out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 is shown can layered video encoding and decoding technique schematic diagram;
Fig. 2 shows the structure diagram of the video monitoring system of one embodiment of the invention;
Fig. 3 shows the flow chart of the video frequency monitoring method of one embodiment of the invention;
Fig. 4 shows the method schematic diagram rejected and regard the video pel outside centrum.
Embodiment
Below in conjunction with attached drawing, embodiments of the present invention is described in detail.
Fig. 1 show the embodiment of the present invention use be layered encoding and decoding technique schematic diagram.
Layered video coding is that Video Image Segmentation is created video image into a basic unit and multiple enhancement layers, this A little video flowings are mounted in the different pieces of information bag on network respectively, influence caused by base layer data packet loss and non-are layered volume Code the result is that consistent, and enhancement layer is based on basic unit rather than prior image frame, and therefore, the data packet of enhancement layer is lost The decline of picture quality will not be caused by losing, so as to greatly improve the anti-packet loss ability of video.
Fig. 2 shows the video monitoring system structure diagram of one embodiment of the invention.As shown in Fig. 2, the video is supervised Control system includes:
Multiple video acquisition devices 1, video coding apparatus 2 and video display devices 3;
Multiple video acquisition devices 1, video coding apparatus 2 and video display devices 3 are connected by network;
Video display devices 3 are used to run three-dimensional geographic information system;
Video acquisition device 1 is used to gather the video information at preset geographical position and be sent to the video information to regard Frequency code device 2;
Video coding apparatus 2 is used to carry out hierarchical coding to the video information of each video acquisition device collection, obtains Layered video information to after multiple codings corresponding with each video acquisition device;
Video display devices 3 are used for please to the transmission video of video coding apparatus 2 according to the acquisition range of video acquisition device 1 Seek information;
Video coding apparatus 2 is additionally operable to after the video request information is received, to video display devices 3 send with The corresponding layered video information of the video request information;
Video display devices 3 are used for the video capture device mark in the layered video information, by the layering Video information is shown in the three-dimensional geographic information system that correspondence position is identified with the video capture device.
Specifically, three-dimensional geographic information system has identifies corresponding three-dimensional geographic information with video capture device.
Application of the embodiment of the present invention can layered video encoding and decoding technique, it is relatively low for the video pixel of wide-long shot, Low resolution and the enhancement data bag of frame per second can be asked during hierarchical decoding, video stream bit rate is low.Wherein, code check refers to specific point The transmission speed of the video of resolution and frame per second.The effect for playing video is not interfered with the same time, improves video display devices decoding Show the scale of video.The video monitoring system proposed using the embodiment of the present invention, can decode real-time display regarding more than 500 tunnels Frequently, while the three-dimensional geographical location information of video can be shown.
In a kind of optional embodiment, video display devices 3 are used for basis and are mapped to depending on Intrapyramidal video pel Elemental area or virtual three-dimensional video camera in the display of video display devices are compiled to the distance of each video pel to video Code device 2 asks the layered video information of corresponding resolution and frame per second.
Video display devices 3 are single-frame images for layered video information described in hierarchical decoding, and by single-frame images texture It is mapped in the three-dimensional geographic information system that correspondence position is identified with the video capture device.
Video display devices 3 are additionally operable to the parameter according to virtual three-dimensional video camera, reject the video pel regarded outside centrum;It is described The parameter of virtual three-dimensional video camera includes position, direction and/or the ken, and the position of the virtual three-dimensional video camera is regarding the vertex of centrum.
Video display devices 3 are specifically used for the video primitive vertices coordinate is substituted into the plane regarding six faces of centrum successively Equation, if the side regarded inside centrum, respective top are directed toward in each vertex of the video pel in each plane regarding centrum Point it is described regard the inside of centrum, otherwise respective vertices it is described regard the outside of centrum, reject described in regard centrum outside video pel.
In practical applications, video acquisition device 2 is high-definition camera, the recommendation resolution ratio of high-definition camera for 1920 × 1080 (other also can).Video display devices 3 are computer or mobile terminal.Video coding apparatus 2 is IPTV layered encoders.
Fig. 3 shows the video frequency monitoring method flow chart of one embodiment of the invention.As shown in figure 3, the video monitoring side Method includes:
Multiple video acquisition devices gather the video information at preset geographical positions and are sent to the video information and regard Frequency code device;
Video coding apparatus carries out hierarchical coding to the video information of each video acquisition device collection, obtains and institute State the layered video information after the corresponding multiple codings of each video acquisition device;
Video display devices send video information according to the acquisition range of the video acquisition device to video coding apparatus Solicited message;
Video coding apparatus sends layered video information corresponding with the video request information to video display devices;
Video capture device mark of the video display devices in the layered video information, the layered video is believed Breath is shown in the three-dimensional geographic information system that correspondence position is identified with the video capture device.Three-dimensional geographic information system is deposited Have and identify corresponding three-dimensional geographic information with video capture device.
Application of the embodiment of the present invention can layered video encoding and decoding technique, improve video display devices decoding and show video Scale.The video frequency monitoring method proposed using the embodiment of the present invention, can decode the video that real-time display is more than 500 tunnels.
In an optional embodiment, video display devices according to the acquisition range of the video acquisition device to regarding Frequency code device, which sends video information solicited message, to be included:
S301:Judge whether the parameter of virtual three-dimensional video camera changes, in the event of changing, perform S302, otherwise Perform S303;
S302:According to the parameter of virtual three-dimensional video camera, the video pel regarded outside centrum is rejected;It is described depending on centrum outside regard Frequency pel is the video pel outside the acquisition range of the video acquisition device.It is i.e. described to regard centrum as the video acquisition device Acquisition range, or the referred to as visible cone scope of video acquisition device.
S303:Calculate the elemental area being mapped to depending on Intrapyramidal video pel in the display of video display devices;
S304:According to the elemental area being mapped to depending on Intrapyramidal video pel in the display of video display devices The layered video information of corresponding resolution and frame per second is asked to the video coding apparatus.
In another optional embodiment, video display devices according to the acquisition range of the video acquisition device to Video coding apparatus, which sends video information solicited message, to be included:
S301:Judge whether the parameter of virtual three-dimensional video camera changes, in the event of changing, perform S302, otherwise Perform S303;
S302:According to the parameter of virtual three-dimensional video camera, the video pel regarded outside centrum is rejected;It is described depending on centrum outside regard Frequency pel is the video pel outside the acquisition range of the video acquisition device.It is i.e. described to regard centrum as the video acquisition device Acquisition range, or the referred to as visible cone scope of video acquisition device.
S303:Virtual three-dimensional video camera is calculated to the distance of each video pel;
S304:Asked accordingly to the video coding apparatus according to virtual three-dimensional video camera to the distance of each video pel The layered video information of resolution ratio and frame per second.
In practical applications, video capture device mark of the video display devices in the layered video information Know, the layered video information is included in the three-dimensional geographic information system of correspondence position is identified with the video capture device Including:
Layered video information described in video display devices hierarchical decoding is single-frame images, and single-frame images texture mapping is arrived In the three-dimensional geographic information system that correspondence position is identified with the video capture device.
Video pel in present embodiment is rectangle video pel.The parameter of the virtual three-dimensional video camera includes position Put, direction, the ken, the position of the virtual three-dimensional video camera is regarding the vertex of centrum.
Texture had both included the texture of body surface on ordinary meaning, i.e. rough rill is presented in body surface, at the same time The multicolour pattern being also included within the smooth surface of object.
Refer to a visible centrum scope for video camera in scene depending on centrum.
The video pel rejected outside depending on centrum includes:
The video primitive vertices coordinate is substituted into the plane equation regarding six faces of centrum successively, if the video pel Each vertex the side regarded inside centrum is directed toward in each plane regarding centrum, then respective vertices are regarded in centrum described Portion, otherwise respective vertices reject the video pel outside centrum described regarding the outside of centrum.It is only right to improve performance With there is the object of intersection to carry out texture mapping depending on centrum.
Judge whether a vertex E (x1, y1, z1) is regarding Intrapyramidal process as (as shown in Figure 4):
Centrum is regarded as ABCD described in setting, and A ' B ' C ' D ', EFGH are video pel, and plane ABCD is directed toward described regard in centrum The normal in portion is (a, b, c), and the plane equation of plane ABCD is ax+by+cz+d=0.By the coordinate generation of vertex E (x1, y1, z1) Enter in plane equation.
For vertex E (x1, y1, z1),
If ax1+by1+cz1+d=0, vertex E is on plane ABCD;
If ax1+by1+cz1+d > 0, vertex E is directed toward regarding the side of centrum in plane ABCD;
If ax1+by1+cz1+d=0, vertex E is directed toward the opposite side regarding centrum in plane ABCD.
Further, the process for calculating the elemental area being mapped to depending on Intrapyramidal video pel in display is as follows:
Each vertex in rectangle video pel is converted into screen coordinate.According to computer graphics, it is known that three-dimensional In geographical information space a bit, the homogeneous coordinates of the point are P (x, y, z, w), and screen coordinate is transformed to using equation below:
P '=PMV·MP·MVP
Wherein, MVRefer to modelview matrix, MPRefer to perspective transformation matrix, MVPRefer to viewport transform matrix.Wherein, video is calculated The process that pel is mapped to the elemental area in the display of video display devices is as follows:
The quadrangle after converting in screen is set as ABCD, is first become 2 triangles ABC and ACD, calculates two The length of side of triangle ABC and ACD, then calculate the elemental area of rectangle video pel by Heron's formula.
Wherein, three length of sides of triangle ABC are set as a, b, c, set p=(a+b+c)/2, then the face of triangle ABC Product
Further, regarding for corresponding resolution and frame per second is asked to the Video coding and Distributor according to table 1 below Frequency flows.Wherein, f is factor of influence, it is recommended to use 0.8.
1 elemental area of table and the resolution ratio and frame per second of request layered video information
Alternatively, the video of corresponding resolution and frame per second is asked to the Video coding and Distributor according to table 2 below Stream.By calculating distance of the virtual camera away from video pel vertex, distance of the virtual camera away from video pel is calculated.Its In, F is distance influence factor, it is recommended to use 1.
The resolution ratio and frame per second of distance of the table 2 away from video pel and request layered video information
Virtual camera to each video pel distance L Resolution ratio Frame per second
L<500mm*F 1920×1080 24fps
500*F<L<=1000*F 1280×720 24fps
1000*F<L<=2000*F 640×480 24fps
3000*F<L<=6000*F 480×272 24fps
6000*F<L<=8000*F 320×240 24fps
8000*F<L<=10000F 160×120 16fps
10000*F<L<=12000*F 80×60 16fps
12000*F<L<=14000*F 40×30 16fps
14000*F<L<=16000*F 10×5 16fps
L>16000*F Do not ask Do not ask
The embodiment of the present invention, which solves video display devices in the prior art and can only load the two dimension on several roads to tens tunnels, to be regarded Frequently, decoding show video scale is smaller the problem of, using can layered video encoding and decoding technique, improve video display devices solution Code shows the scale of video.Using video frequency monitoring method proposed by the present invention, the video that real-time display is more than 500 tunnels can be decoded.
Although being described in conjunction with the accompanying embodiments of the present invention, those skilled in the art can not depart from this hair Various modifications and variations are made in the case of bright spirit and scope, such modifications and variations are each fallen within by appended claims Within limited range.

Claims (10)

  1. A kind of 1. video monitoring system, it is characterised in that including:
    Multiple video acquisition devices, video coding apparatus and video display devices;
    The video display devices are used to run three-dimensional geographic information system;
    The video acquisition device is used to gather the video information at preset geographical position and the video information is sent to institute State video coding apparatus;
    The video coding apparatus is used to carry out hierarchical coding to the video information of the multiple video acquisition device collection, obtains Layered video information after multiple codings corresponding with each video acquisition device;
    The video display devices are used to be sent to the video coding apparatus according to the acquisition range of the video acquisition device Video request information;
    The video coding apparatus is additionally operable to after the video request information is received, and is sent to the video display devices Layered video information corresponding with the video request information;
    The video display devices are used for the video capture device mark in the layered video information, and the layering is regarded Frequency presentation of information is in the three-dimensional geographic information system of correspondence position is identified with the video capture device.
  2. 2. video monitoring system according to claim 1, it is characterised in that
    The video display devices are used for basis and are mapped to depending on Intrapyramidal video pel in the display of video display devices Elemental area or virtual three-dimensional video camera ask corresponding resolution to the distance of each video pel to the video coding apparatus With the layered video information of frame per second.
  3. 3. video monitoring system according to claim 1, it is characterised in that
    The video display devices are single-frame images for layered video information described in hierarchical decoding, and single-frame images texture is reflected It is mapped in the three-dimensional geographic information system that correspondence position is identified with the video capture device.
  4. 4. video monitoring system according to claim 1, it is characterised in that
    The video display devices are additionally operable to the parameter according to virtual three-dimensional video camera, reject the video pel regarded outside centrum;
    The parameter of the virtual three-dimensional video camera includes position, direction and/or the ken, and the position of the virtual three-dimensional video camera is Depending on the vertex of centrum.
  5. 5. video monitoring system according to claim 4, it is characterised in that
    The video display devices are specifically used for successively substituting into the video primitive vertices coordinate regarding the flat of six faces of centrum Face equation, if the side regarded inside centrum, phase are directed toward in each vertex of the video pel in each plane regarding centrum Answer vertex described regarding the inside of centrum, otherwise respective vertices described regarding the outside of centrum, reject it is described depending on centrum outside regard Frequency pel.
  6. 6. a kind of extensive dispatching method of video based on any video monitoring system of the claims 1~5, it is special Sign is, including:
    The multiple video acquisition device gathers the video information at preset geographical position and is sent to the video information and regards Frequency code device;
    The video coding apparatus carries out hierarchical coding to the video information of each video acquisition device collection, obtains and institute State the layered video information after the corresponding multiple codings of each video acquisition device;
    The video display devices send video information according to the acquisition range of the video acquisition device to video coding apparatus Solicited message;
    The video coding apparatus sends layered video corresponding with the video request information to the video display devices to be believed Breath;
    Video capture device mark of the video display devices in the layered video information, the layered video is believed Breath is shown in the three-dimensional geographic information system that correspondence position is identified with the video capture device.
  7. 7. the extensive dispatching method of video according to claim 6, it is characterised in that the video display devices are according to institute State the acquisition range of video acquisition device includes to video coding apparatus transmission video information solicited message:
    S301:Judge whether the parameter of virtual three-dimensional video camera changes, in the event of changing, perform S302, otherwise perform S303;
    S302:According to the parameter of virtual three-dimensional video camera, the video pel regarded outside centrum is rejected;
    S303:Calculate the elemental area or virtual three being mapped to depending on Intrapyramidal video pel in the display of video display devices Video camera is tieed up to the distance of each video pel;
    S304:According to the elemental area being mapped to depending on Intrapyramidal video pel in the display of video video display device Or virtual three-dimensional video camera asks corresponding resolution and frame per second to the distance of each video pel to the video coding apparatus Layered video information.
  8. 8. the extensive dispatching method of video according to claim 7, it is characterised in that the video display devices are according to institute State in layered video information video capture device mark, by the layered video information include with the video capture device The three-dimensional geographic information system of mark correspondence position includes:
    Layered video information described in the video display devices hierarchical decoding is single-frame images, and single-frame images texture mapping is arrived In the three-dimensional geographic information system that correspondence position is identified with the video capture device.
  9. 9. the extensive dispatching method of video according to claim 7, it is characterised in that the ginseng of the virtual three-dimensional video camera Number includes position, direction and/or the ken, and the position of the virtual three-dimensional video camera is regarding the vertex of centrum.
  10. 10. the extensive dispatching method of video according to claim 7, it is characterised in that described to reject regarding outside depending on centrum Frequency pel includes:
    The video primitive vertices coordinate is substituted into the plane equation regarding six faces of centrum successively, if the video pel is each The side regarded inside centrum is directed toward on vertex in each plane regarding centrum, then respective vertices described regarding the inside of centrum, Otherwise respective vertices reject the video pel outside centrum described regarding the outside of centrum.
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