CN108737745A - video fusion method and device - Google Patents

video fusion method and device Download PDF

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Publication number
CN108737745A
CN108737745A CN201710266513.0A CN201710266513A CN108737745A CN 108737745 A CN108737745 A CN 108737745A CN 201710266513 A CN201710266513 A CN 201710266513A CN 108737745 A CN108737745 A CN 108737745A
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China
Prior art keywords
video
transparency
frame
video frame
fusion
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CN201710266513.0A
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Chinese (zh)
Inventor
李桦林
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Hangzhou Hikvision Digital Technology Co Ltd
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Hangzhou Hikvision Digital Technology Co Ltd
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Priority to CN201710266513.0A priority Critical patent/CN108737745A/en
Publication of CN108737745A publication Critical patent/CN108737745A/en
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    • 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
    • H04N5/265—Mixing
    • 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
    • H04N5/2628—Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation
    • 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
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The invention discloses a kind of video fusion method and devices.This method includes：The video for receiving multipath video source input, the video reference display resolution from the multipath video source is zoomed in and out, and caches the video after scaling, and the multipath video source includes the first video source and the second video source；The first video and the second video are obtained, and obtains the fusion parameters that user is arranged for first video and second video, first video is the video from first video source, and second video is the video from second video source；First video is merged with second video according to the fusion parameters, fusion video is obtained.The present invention merges the first video with the second video according to fusion parameters, and fusion parameters can be arranged according to the demand of itself in user, so that the video after fusion is met user and watches demand, improves the flexibility of user's viscosity and video fusion.

Description

Video fusion method and device
Technical field
The present invention relates to technical field of image processing, more particularly to a kind of video fusion method and device.
Background technology
With the development of technology, real-time, accurate large screen technology increasingly attracts attention.In order to obtain high-resolution, The video playing picture of high brightness, big display size, large-size screen monitors spell control device and come into being.Wherein, it is that can support that large-size screen monitors, which spell control device, Multipath video source accesses, and the image processing equipment that can be handled in real time the video from any road video source, usually Applied to field of video monitoring such as public security, traffic.Control device is spelled when large-size screen monitors and accesses multipath video source, and to coming from any road video source Video when playing out, user from from the video of multipath video source in order to know more information, it usually needs to this Multipath video source multi-level, multi-angle the broadcasting such as is merged or is switched and shown.Wherein, video fusion technology refers in the future It is merged from the video of multiple video sources, to generate a new video.Video switching is to be shown to switch to by video all the way Another way video is shown.Currently, switching for video fusion or video, is usually separately handled, different connect is provided Mouth and technology realize the processing for carrying out video fusion or video switching, and are configured by fixed configuration parameter, reduction The flexibility of video fusion, may not meet the viewing demand of user so as to cause the video after fusion, influence user's sight It sees effect, and then leads to the reduction of user's viscosity.
Invention content
In order to which the flexibility ratio for solving video fusion in the prior art is low, cause user's viewing effect bad, it is viscous to reduce user The problem of spending, an embodiment of the present invention provides a kind of video fusion method and devices.The technical solution is as follows：
On the one hand, a kind of video fusion method is provided, the method includes：
The video for receiving multipath video source input carries out the video reference display resolution from the multipath video source Scaling, and the video after scaling is cached, the multipath video source includes the first video source and the second video source；
The first video and the second video are obtained, and obtains user and is arranged for first video and second video Fusion parameters, first video be the video from first video source, second video be from described second The video of video source；
First video is merged with second video according to the fusion parameters, fusion video is obtained.
Optionally, described to merge first video according to the fusion parameters with second video, it obtains Video is merged, including：
When the fusion parameters include needing to carry out the quantity N of the video frame of video fusion, N number of first transparency is determined With N number of second transparency, N number of first transparency corresponds to each video frame in N number of video frame of first video Transparency, N number of second transparency correspond to the transparency of each video frame in N number of video frame of second video, institute It is the positive integer more than 1 or equal to 1 to state N；
Obtaining first video and during second video, when often getting one of first video When video frame and a video frame of second video, by the video frame of first video of acquisition and second video Video frame, merged according to corresponding first transparency and the second transparency, obtain one fusion video frame, until carry out The fusion of n times video frame.
Optionally, N number of first transparency of the determination and N number of second transparency, including：
N number of first transparency and N number of second transparency are determined by following formula：
Wherein, the k is k-th of video frame in the N number of video frame for carry out video frame fusion, the C1(k) it is described The transparency of k-th of video frame in N number of video frame of first video, the C2(k) it is N number of video frame of second video In k-th of video frame transparency.
Optionally, the video frame of the video frame and second video of first video by acquisition, according to right The first transparency and the second transparency answered are merged, and a fusion video frame is obtained, including：
It is transparent according to corresponding first by the video frame of the video frame and second video of first video of acquisition Degree and the second transparency are merged by following formula, obtain a fusion video frame：
Y (x, y, k)=C1(k)*A(x,y,k)+C2(k)*B(x,y,k)
Wherein, the Y (x, y, k) is the pixel for the pixel that abscissa is x, ordinate is y in k-th of fusion video frame Value, the A (x, y, k) be first video N number of video frame in abscissa is x in k-th of video frame, ordinate is y's The pixel value of pixel, the B (x, y, k) be second video N number of video frame in k-th of video frame abscissa be x, Ordinate is the pixel value of the pixel of y.
Optionally, described to merge first video according to the fusion parameters with second video, it obtains Video is merged, including：
When the fusion parameters include need carry out video fusion video frame quantity M when, obtain third transparency and 4th transparency, the third transparency are the transparency of M video frame setting of the user for first video, described the Four transparencies are the transparency that user is arranged for M video frame of second video, the third transparency and described the Four transparencies, which are added, is equal to 1, and the M is the positive integer more than or equal to 1；
Obtaining first video and during second video, when often getting one of first video When video frame and a video frame of second video, it is based on the third transparency and the 4th transparency, will be obtained The video frame of first video merged with the video frame of second video, obtain a fusion video frame.
Optionally, described to be based on the third transparency and the 4th transparency, by first video of acquisition Video frame is merged with the video frame of second video, obtains a fusion video frame, including：
Based on the third transparency and the 4th transparency, by the video frame of first video of acquisition with it is described The video frame of second video is merged according to the following equation, obtains the fusion video frame：
Y (x, y)=C1A(x,y)+C2B(x,y)
Wherein, the Y (x, y) is the pixel value for the pixel that abscissa is x, ordinate is y in the fusion video frame, The A (x, y) be first video obtained video frame in abscissa is x, ordinate is y pixel pixel value, The B (x, y) be second video obtained video frame in abscissa is x, ordinate is y pixel pixel value, The C1For the third transparency, the C2For the 4th transparency.
Optionally, described to zoom in and out the video reference display resolution from the multipath video source, and cache contracting Video after putting, including：
Corresponding buffer area is divided to the roads multipath video source Zhong Mei video source；
The video frame that video from the multipath video source includes is scaled to the video frame of same resolution ratio, and will contracting The buffer area of the corresponding video source of video frame write-in after putting.
On the other hand, a kind of video fusion device is provided, described device includes：
Cache module, the video for receiving multipath video source input, by the video reference from the multipath video source Display resolution zooms in and out, and caches the video after scaling, and the multipath video source includes that the first video source and second regard Frequency source；
Acquisition module, for obtaining the first video and the second video, and acquisition user for first video and institute The fusion parameters of the second video setting are stated, first video is the video from first video source, second video For the video from second video source；
Fusion Module is obtained for merging first video according to the fusion parameters with second video To fusion video.
Optionally, the Fusion Module is used for：
When the fusion parameters include needing to carry out the quantity N of the video frame of video fusion, N number of first transparency is determined With N number of second transparency, N number of first transparency corresponds to each video frame in N number of video frame of first video Transparency, N number of second transparency correspond to the transparency of each video frame in N number of video frame of second video, institute It is the positive integer more than 1 or equal to 1 to state N；
Obtaining first video and during second video, when often getting one of first video When video frame and a video frame of second video, by the video frame of first video of acquisition and second video Video frame, merged according to corresponding first transparency and the second transparency, obtain one fusion video frame, until carry out The fusion of n times video frame.
Optionally, the Fusion Module is additionally operable to：
N number of first transparency and N number of second transparency are determined by following formula：
Wherein, the k is k-th of video frame in the N number of video frame for carry out video frame fusion, the C1(k) it is described The transparency of k-th of video frame in N number of video frame of first video, the C2(k) it is N number of video frame of second video In k-th of video frame transparency.
Optionally, the Fusion Module is additionally operable to：
It is transparent according to corresponding first by the video frame of the video frame and second video of first video of acquisition Degree and the second transparency are merged by following formula, obtain a fusion video frame：
Y (x, y, k)=C1(k)*A(x,y,k)+C2(k)*B(x,y,k)
Wherein, the Y (x, y, k) is the pixel for the pixel that abscissa is x, ordinate is y in k-th of fusion video frame Value, the A (x, y, k) be first video N number of video frame in abscissa is x in k-th of video frame, ordinate is y's The pixel value of pixel, the B (x, y, k) be second video N number of video frame in k-th of video frame abscissa be x, Ordinate is the pixel value of the pixel of y.
Optionally, the Fusion Module is additionally operable to：
When the fusion parameters include need carry out video fusion video frame quantity M when, obtain third transparency and 4th transparency, the third transparency are the transparency of M video frame setting of the user for first video, described the Four transparencies are the transparency that user is arranged for M video frame of second video, the third transparency and described the Four transparencies, which are added, is equal to 1, and the M is the positive integer more than or equal to 1；
Obtaining first video and during second video, when often getting one of first video When video frame and a video frame of second video, it is based on the third transparency and the 4th transparency, will be obtained The video frame of first video merged with the video frame of second video, obtain a fusion video frame.
Optionally, the Fusion Module is additionally operable to：
Based on the third transparency and the 4th transparency, by the video frame of first video of acquisition with it is described The video frame of second video is merged according to the following equation, obtains the fusion video frame：
Y (x, y)=C1A(x,y)+C2B(x,y)
Wherein, the Y (x, y) is the pixel value for the pixel that abscissa is x, ordinate is y in the fusion video frame, The A (x, y) be first video obtained video frame in abscissa is x, ordinate is y pixel pixel value, The B (x, y) be second video obtained video frame in abscissa is x, ordinate is y pixel pixel value, The C1For the third transparency, the C2For the 4th transparency.
Optionally, the cache module is additionally operable to：
Corresponding buffer area is divided to the roads multipath video source Zhong Mei video source；
The video frame that video from the multipath video source includes is scaled to the video frame of same resolution ratio, and will contracting The buffer area of the corresponding video source of video frame write-in after putting.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：In embodiments of the present invention, the is being obtained When one video and the second video, fusion parameters can be arranged according to the viewing demand of itself in user, improve the spirit of video fusion Activity.In addition, after being merged the first video and the second video according to fusion parameters, the video after the fusion disclosure satisfy that The viewing demand of user, improves user's viscosity.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings Attached drawing.
Figure 1A is a kind of Multisensor video fusion system configuration diagram provided in an embodiment of the present invention.
Figure 1B is a kind of Multisensor video fusion system configuration diagram provided in an embodiment of the present invention.
Fig. 1 C are a kind of structural schematic diagrams of video fusion processing module provided in an embodiment of the present invention.
Fig. 2A is a kind of flow chart of video fusion method provided in an embodiment of the present invention.
Fig. 2 B are a kind of schematic diagrames of spatial cache provided in an embodiment of the present invention.
Fig. 3 A are a kind of flow charts of video switching method provided in an embodiment of the present invention.
Fig. 3 B are a kind of Parameters variation schematic diagrames of the linear handoff scenario of video provided in an embodiment of the present invention.
Fig. 4 is a kind of structural schematic diagram of video fusion device provided in an embodiment of the present invention.
Fig. 5 is the structural schematic diagram that a kind of large-size screen monitors provided in an embodiment of the present invention spell control device.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention Formula is described in further detail.
Before carrying out detailed explanation to the embodiment of the present invention, the first name to being arrived involved in the embodiment of the present invention Word, application scenarios and system architecture are explained respectively.
First, to involved in the embodiment of the present invention to noun be introduced.
Large-size screen monitors spell control device
Large-size screen monitors spell control device and are also known as video wall large screen processor controller, multi-screen processor splicer etc., which spells control One complete image can be divided into polylith image by device, and the polylith image is projected respectively on polylith screen, to group At the image of a jumbotron.
FPGA (Field-ProgrammableGateArray, field programmable gate array)
FPGA is the product further developed on the basis of programming device, is in the field application-specific integrated circuit (ASIC) A kind of semi-custom circuit.
Video fusion
Video fusion refers to that the transparency of video frame that two videos include according to a certain percentage is superposed to a resolution The video frame that rate is shown.Wherein, the resolution sizes for the video frame that two videos for carrying out video fusion include can be identical, It can be different.When resolution ratio difference, the display picture color saturation degree of the video after fusion may be bad, to influence to merge The result of broadcast of video.Therefore, in order to ensure merge rear video picture color saturation it is sufficiently high, it is generally the case that carry out The resolution sizes for the video frame that two videos of video fusion include are identical.
Secondly, to the present embodiments relate to application scenarios be introduced.
Currently, user from the video from multiple video sources in order to know more information, it will usually be melted using video Conjunction technology merges the video of multiple video sources.But when carrying out video fusion at present, matched by preset parameter It sets, not only reduces the flexibility ratio of video fusion, while the video after fusion may can not meet the needs of user's viewing, from And also reduce user's viscosity.Therefore, an embodiment of the present invention provides a kind of video fusion method, this method can got In multiple video sources when the video of any two video sources, according to the fusion parameters of user setting, by regarding for any two video sources Frequency is merged, to improve the flexibility of video fusion.Video after merging simultaneously disclosure satisfy that the viewing demand of user, Improve user's viscosity.
It should be noted that the video fusion method that the embodiment of the present invention is provided can be applied to plurality of application scenes In, for example, in the field of video monitoring such as public security, traffic.Due to may relate to video in the field of video monitoring such as public security, traffic Switching, therefore, the video fusion method can be applied in video switching.It is led in traffic monitoring when applying video fusion method When domain, since each camera can shoot the situation of road where it in multiple cameras for being installed in road, Road conditions video is obtained, therefore, the multiple cameras of installation in the road control device can be spelled as multiple video sources and large-size screen monitors and connected It connects.The large-size screen monitors, which spell control device, can obtain the collected video of any of multiple camera camera, and the video is carried out It plays.During playing one of camera collected video, traffic administration personnel are in order to know other roads Traffic information, can trigger at this time large-size screen monitors spell control device video switching command, the large-size screen monitors spell control device can be cut according to the video Instruction is changed, obtains the video of another camera acquisition, and the video that another camera of acquisition acquires is played out.For Convenient for description, currently playing video is known as the first video, the video obtained after switching command will be received and be known as second Video.Due to when obtaining the second video, may can not temporarily get the second video because of reasons such as network delays, cause There is blank screen phenomenon.Simultaneously as the video content of the first video and the second video differs greatly, video pictures are may result in The unnatural problem of transition.But after a kind of video fusion method provided in an embodiment of the present invention is applied in video switching, When large-size screen monitors, which spell control device, gets the second video during playing the first video, the first video and the second video can be pressed It is merged according to the fusion parameters of user setting, obtains fusion video.Fusion video is played out later, and in fusion video After finishing, continues to play the second video, to achieve the effect that a video linearly switches in playing process, keep away Exempt from the unnatural problem of video switching transition to occur.The continuity that ensure that video playing simultaneously avoids and switches in video Occurs the case where blank screen in the process.In addition, since fusion parameters can be configured by user according to the viewing demand of itself, from And improve the flexibility of video fusion.
It should be noted that only being illustrated by taking above-mentioned application scenarios as an example in embodiments of the present invention, not to this hair Bright embodiment, which is constituted, to be limited.
Finally, to the present embodiments relate to system architecture be introduced.
Figure 1A is a kind of structural schematic diagram of Multisensor video fusion system provided in an embodiment of the present invention, referring to Figure 1A, the video Emerging system includes multipath video source 1, video cache module 2, FPGA3 and display 4.Wherein, which can be with FPGA3 connections, FPGA3 can be connect with video cache module 2 and display 4 respectively.The multipath video source 1 can access FPGA3, the FPGA3 can control the video for playing any road video source in the multipath video source 1.In addition, the FPGA 3 It can also be merged by the video of any two video sources in multiple video sources or more than two-path video.For ease of description, Figure 1A is illustrated with two-path video source, and referring to Figure 1A, which is respectively the first video source 11 and the second video source 12.When the first video source 11 and the second video source 12 access FPGA3, FPGA3 can obtain the from first video source 11 One video obtains the second video from the second video source 12, and video cache module 2 is written in the first video and the second video, The video cache module 2 can cache the first video and the second video of FPGA3 transmissions.When FPGA3 controls are played from the When the first video of one video source, what FPGA3 can read from the first video source from the video cache module 2 first regards Frequently, it and by the first video of reading is sent to display 4, so that the display of display 4 plays first video.In addition, the FPGA3 The first video from the first video source and the from the second video source can also be read simultaneously from the video cache module 2 Two videos, and the first video of reading and the second video are merged.
Wherein, may include video frame in FPGA3 referring to Figure 1B in order to merge the first video with the second video Zoom module 31 and video fusion processing module 32, video scaling module 31 and video fusion processing module 32 are slow with video respectively Storing module 2 connects.Wherein, FPGA3 may include a video frame Zoom module, can also include that multiple video frame scale mould Block, when FPGA3 includes a video frame Zoom module, which can be by regarding from multipath video source 1 The video frame that frequency includes zooms in and out；When the FPGA3 includes multiple video frame Zoom modules, multiple video frame Zoom module It corresponds, that is to say, any one video frame Zoom module in multiple video frame Zoom module can with the multipath video source 1 It is zoomed in and out with the video frame for including to the video for carrying out self-corresponding video source, and video cache is written into the video frame after scaling Module 2.For ease of description, Figure 1B is right with the first video source 11 corresponding video frame Zoom module, 311 and second video sources 12 It is illustrated for the video frame Zoom module 312 answered.Video fusion processing module 32 from video cache module 2 for reading The first video from the first video source reads the second video from the second video source from video cache module 2, and will read The second video is taken to be merged with the first video, the video after fusion, which is sent to display 4, to be played out.
In addition, for video fusion processing module 32, in order to realize the flexibility of video fusion, referring to Fig. 1 C, the video Fusion treatment module 32 may include video read module 321, video fusion management module 322 and video fusion computing module 323.Video read module 321 can be with video frame buffer module 2, video fusion management module 322 and video fusion operation mould Block 323 is separately connected, and video fusion computing module 323 can also respectively connect with video fusion management module 322 and display 4 It connects.Wherein, video fusion management module 322 is used to that the fusion parameters for carrying out video fusion to be arranged, and is regarded for example, can be arranged The mode of frequency fusion, it is assumed that setting is transparent according to fixation by M video frame of the first video and M video frame of the second video Degree is merged, or is arranged N number of video frame of the first video and N number of video frame of the second video according to transparency gradual change side Formula merges etc., and works as setting by M video frame of the first video and M video frame of the second video according to fixed transparency When being merged, the fixation transparency of two videos of setting progress video fusion is can also continue to (for example, in following embodiments Be related to be the first video setting third transparency and be the second video setting the 4th transparency) etc..Video fusion pipe It manages module 322 after the setup, fusion parameters can be assigned to video read module 321 and video fusion computing module 323.The fusion parameters that video read module 321 is used to be distributed according to video fusion management module 322, from video cache module 2 Two videos of middle reading, and two videos of reading are sent to video fusion computing module 323.Video fusion computing module 323 can receive two videos of the transmission of video read module 321, and the fusion distributed according to video fusion management module 322 Parameter merges two videos of reading.Further, which can be by regarding after fusion Frequency is sent to display 4 and plays out.
Video fusion method provided in an embodiment of the present invention can be applied in big screen controller, can also be applied to other Image processing equipment, the embodiment of the present invention are illustrated for video fusion method to be applied to large-size screen monitors and spells control device.By upper Description is stated it is found that when multipath video source access large-size screen monitors spell control device, large-size screen monitors spell control device can be by video cache module in the future It is cached from the video of multipath video source, and by video fusion processing module to appointing two-path video source in the multipath video source Video merged.Below in conjunction with attached drawing 2A, control device is spelled by the first video of the first video source in multipath video source to large-size screen monitors The operation merged with the second video of the second video source illustrates, and specifically comprises the following steps.
Step 201：The video for receiving multipath video source input, by the video reference display resolution from multipath video source It zooms in and out, which includes the first video source and the second video source.
Specifically, when large-size screen monitors, which spell control device, detects multipath video source access, regarding for multipath video source input can be received Frequently, corresponding buffer area and to the roads multipath video source Zhong Mei video source is divided, by the video bag from the multipath video source The video frame included is scaled the video frame of same resolution ratio, and the video frame write-in after scaling is corresponded to the buffer area of video source.
In order to make it easy to understand, the embodiment of the present invention spells control device to the roads multipath video source Zhong Mei video source to large-size screen monitors first The operation for dividing corresponding buffer area illustrates, and spell control device to large-size screen monitors again later includes by the video from the multipath video source Video frame be scaled the video frame of same resolution ratio, and by the behaviour of the buffer area of the corresponding video source of video frame write-in after scaling It illustrates.
The operation that control device divides the roads multipath video source Zhong Mei video source corresponding buffer area is spelled about large-size screen monitors：
It wherein, can be for the multipath video source successively when large-size screen monitors, which spell control device, receives the video of multipath video source input Divide buffer area, and the buffer area per road video source is a continuous memory space, each video source in the multipath video source Buffer area and multipath video source in the buffer areas of other video sources also constitute a continuous memory space.In addition, due to It is typically to be cached one by one to the video frame that video includes when video is cached, therefore, is divided to multipath video source When buffer area, the size of the buffer area of each video source can be the size being written for two video frame.Certainly in practical application In or for the write-in of multiple video frame size, for example, the buffer size is size be written for three video frame, confession The size etc. of four video frame write-in.
It should be noted that large-size screen monitors spelling control device not only can be through the above way to each video source in multiple video source Buffer area is divided, can also be divided by other means.For example, first time access large-size screen monitors are spelled with the video source of control device, The large-size screen monitors, which spell control device, to divide a fixed buffer area to the video source, when the video source and the large-size screen monitors are spelled between controlling device When connection disconnects, which spells the buffer area that the video source can be remained in control device.The more of control device are spelled when being currently accessed large-size screen monitors When there is the video source for once accessing large-size screen monitors spelling control device in a video source, is spelled in control device due to the large-size screen monitors and remain with the video source Buffer area, therefore, the large-size screen monitors spell control device and no longer need to divide buffer area to the video source, only need to be to being connect for the first time in multiple video sources Enter the video source division buffer area that large-size screen monitors spell control device, the embodiment of the present invention is not specifically limited this.
It is worth noting that since large-size screen monitors spell control device when reading and writing video, generally use polling mode that is to say, write When entering video frame, the video frame being currently written cannot cover the current video frame read, if be currently written Video frame when needing that the position of the video frame currently read is written, in order to not influence the video frame currently read, It can be repeatedly written the video frame being currently written on the position of upper primary write-in video frame.Meanwhile delaying when video source It deposits area and writes full and when not carrying out the reading of video frame, current will need to write again from the initial position of the buffer area of the video source The video frame write-in entered, i.e., will currently need the video frame being written to cover the video frame having been written into.When reading video frame, every time The video frame being newly written is read, i.e., reads the previous frame video frame for the video frame being currently written every time.Therefore, logical In the case of often, the size of the buffer area of each video source can be the size being written for two video frame.
In order to make it easy to understand, the embodiment of the present invention by large-size screen monitors spell control device read and write the first video source video process for into Row explanation.When the size of the buffer area of the first video source is the size being written for two video frame, if write in buffer area Enter video frame A, and when large-size screen monitors spell control device and currently reading video frame A, presently written video frame B cannot cover it is current The video frame A of reading；It is rear that video frame B, and the video frame C being currently written into is written if video frame A is first written in current cache area When needing the position of the current video frame A read of write-in, in order to not influence the video frame A, Ke Yi currently read It is repeatedly written the video frame C being currently written on the position of last time write-in video frame B.If the buffer area of the first video source In have been written into video frame A and video frame B, but when not carrying out the reading of video frame, will currently need the video frame C coverings being written The video frame A of write-in.If video frame A is first written in buffer area, video frame B is currently written, then when reading video frame, It needs first to read video frame A.
Further, large-size screen monitors spell control device after dividing corresponding buffer area to the roads multipath video source Zhong Mei video source, Can also be that each buffer area distributes frame number according to the size of buffer area, for example, referring to Fig. 2 B, the buffer area of the first video source is big Therefore the small size to be written for two video frame is respectively frame number 1 and frame number for the buffer area distribution frame number of the first video source 2, the buffer size of the second video source is similarly the size being written for two video frame, is the caching of the second video source therefore It is respectively frame number 1 and frame number 2 that area, which distributes frame number,.
It is worth noting that by Figure 1A it is found that it may include video cache module, the video cache that the large-size screen monitors, which are spelled in control device, Module can cache the video from multipath video source, and therefore, the buffer area that the above-mentioned video for multiple video sources divides is located at In video cache module.It that is to say, it, can be in video cache module when large-size screen monitors, which spell control device, detects multipath video source access Corresponding buffer area is divided to the roads multipath video source Zhong Mei video source.
Control device is spelled about large-size screen monitors, and the video frame that the video from the multipath video source includes is scaled same resolution ratio Video frame, and by the operation of the buffer area of the corresponding video source of video frame write-in after scaling：
It wherein, can be more by this when large-size screen monitors spelling control device zooms in and out the video frame that the video of the multipath video source includes The video frame that the video of road video source includes is scaled the video frame of default resolution ratio, such as is scaled and display resolution phase Together, the resolution sizes for the video frame that the video of the roads multipath video source Zhong Mei video source includes can also first be determined, and determined The video frame that the video of the multipath video source includes, is scaled the video frame of minimum resolution by minimum resolution ratio.Alternatively, can With the maximum resolution ratio of determination, the video frame that the video of the multipath video source includes is scaled to the video frame of maximum resolution. Or the resolution sizes for the video frame that can include according to the video of any road video source in multipath video source, this is more The video frame that the video of road video source includes zooms in and out.
It should be noted that since the video frame for including by the video of the multipath video source is scaled regarding for maximum resolution Frequency frame, alternatively, the resolution sizes for the video frame for including according to the video of any road video source in multipath video source, by the multichannel When the video frame that the video of video source includes zooms in and out, the color for the video frame that the video that all may be decreased partial video source includes Color saturation degree and clarity, thus when subsequently carrying out video fusion, it is possible that the video pictures color saturation after fusion Degree is poor, clarity also poor situation.And the video frame that the video of the multipath video source includes is scaled regarding for minimum resolution Frequency frame may then make the color saturation and clarity higher of the video frame that the video in partial video source includes, therefore, usually In the case of, the video frame that the video of the multipath video source includes can be scaled to the video frame of minimum resolution.
In addition, the default resolution ratio can be arranged in advance, for example, the default resolution ratio can be 1440*900,1920* 1080 etc..
Furthermore by Figure 1A it is found that it may include video frame Zoom module that the large-size screen monitors, which are spelled in control device, the video frame Zoom module The video frame that can include to the video of video source zooms in and out.Therefore, the video from multipath video source is joined in step 201 Examining the operation that display resolution zooms in and out can be realized by the video frame Zoom module.
It should be noted that large-size screen monitors spell the operation that control device zooms in and out the video frame that the video of the multipath video source includes It may include not only above-mentioned several ways, can also include other modes, can remember from scaling history for example, the large-size screen monitors spell control device A scaling resolution ratio is obtained in record, and the video frame that the video of the multipath video source includes is scaled to the video of scaling resolution ratio Frame, the embodiment of the present invention are not specifically limited this.
It should also be noted that, in embodiments of the present invention, large-size screen monitors spell control device and divide buffer area and right to multipath video source The operation order that the video frame that video from multipath video source includes zooms in and out does not limit.It that is to say, spell and control when large-size screen monitors When device accesses multipath video source, which, which spells control device, first to divide buffer area to the multipath video source, and it is more then will to come from this The video frame that the video of road video source includes is scaled the video frame of same resolution ratio, and the video frame after scaling is written and is corresponded to The buffer area of video source；The video frame that the video from the multipath video source includes is scaled together alternatively, the large-size screen monitors spell control device Then the video frame of one resolution ratio divides buffer area, after caching Division, by the video after scaling to multipath video source The buffer area of the corresponding video source of frame write-in；Alternatively, the large-size screen monitors, which spell control device, can be carried out at the same time caching Division and video frame scaling Operation, later, by the buffer area of the corresponding video source of video frame write-in after scaling.
It is worth noting that large-size screen monitors spell control device the video frame that the video of multiple video sources of access includes is scaled it is same After the video frame of resolution ratio, when subsequently being merged the video in arbitrary two-path video source, a complete fusion can be obtained and regarded The fusion video of frequency frame to keep broadcasting pictures color nature saturation degree high, while keeping broadcasting pictures smooth.In addition, will scaling Video frame afterwards is cached, it is ensured that large-size screen monitors spell control device when needing to obtain the video of any video source, can be regarded from this The video frame that the video is got in the buffer area of frequency source improves large-size screen monitors and spells the reliability that control device obtains video.
Step 202：The first video and the second video are obtained, and obtains user and is arranged for the first video and the second video Fusion parameters, the first video be the video from the first video source, the second video be the video from the second video source.
It should be noted that the fusion parameters may include needing to carry out the quantity of the video frame of video fusion, being regarded The mode etc. of frequency fusion.
Due to when the large-size screen monitors spell control device receive multipath video source input video when, can regarding the multipath video source The video frame that frequency includes is scaled the video frame of same resolution ratio, and the video frame write-in after scaling is corresponded to the caching of video source Control device is spelled when receiving the video of the first video source and the input of the second video source by area, therefore, large-size screen monitors, can be by the first video source The video video frame that includes the corresponding buffer area of the first video source, the video frame that the video by the second video source includes is written The corresponding buffer area of the second video source is written, the first video is obtained and when the second video to spell control device in the large-size screen monitors, it can be with The video frame that the first video includes is read from the corresponding buffer area of the first video source, from the corresponding buffer area of the second video source Read the video frame that the second video includes.
It is worth noting that since large-size screen monitors spell the video that control device receives multipath video source input, and to the multi-channel video Can also be that each buffer area distributes frame according to the size of buffer area after the roads Yuan Zhongmei video source divides corresponding buffer area Number, therefore, it can be that a frame number is arranged in multiple video sources in advance that large-size screen monitors, which spell control device, alternatively, being in multiple video sources in advance A frame number is arranged in each video source.In embodiments of the present invention, it is that multiple video sources are arranged one to spell control device in advance with large-size screen monitors It is illustrated for frame number.It, can be in the first video source pair when large-size screen monitors, which spell control device, to be needed to obtain the first video and the second video In the buffer area answered, the video frame of write-in is read since the corresponding position of frame number set in advance, is corresponded in the second video source Buffer area in, since the corresponding position of frame number set in advance read write-in video frame.
For example, when frame number set in advance is frame number 1, and large-size screen monitors spell control device and need to obtain the first video and the second video When, which, which spells control device, regarding for write-in is read since frame number is 1 position in the corresponding buffer area of the first video source Frequency frame, and from the corresponding buffer area of the second video source, the video frame of write-in is read since 1 corresponding position of frame number.Certainly, In practical applications, it is obtained when user makes large-size screen monitors spell control device by specified operation (clicking operation, slide, voice operating etc.) When the first video and the second video, a frame number can also be set in real time, corresponded in the first video source to make large-size screen monitors spell control device Buffer area in, since the corresponding position of frame number being arranged in real time read write-in video frame, and the second video source correspond to Buffer area in, since the corresponding position of frame number being arranged in real time read write-in video frame.
It is worth noting that by Figure 1A it is found that it may include video fusion processing module, the video that the large-size screen monitors, which are spelled in control device, May include video fusion management module in fusion treatment module, which can be arranged carry out video fusion Fusion parameters.Therefore, large-size screen monitors, which spell control device, to obtain the fusion parameters from the video fusion management module.
Step 203：First video is merged with the second video according to the fusion parameters, fusion video is obtained.
Seen from the above description, carry out video can be arranged in the video fusion management module that video fusion processing module includes The fusion parameters of fusion, the fusion parameters may include carrying out the mode of video fusion, and therefore, large-size screen monitors are spelled control device and joined according to fusion The difference of the mode for the progress video fusion that number includes, the first video is merged with the second video according to the fusion parameters Mode it is also different, it is following to be illustrated by taking two kinds of amalgamation modes as an example.
First way, when the fusion parameters include needing to carry out the quantity N of the video frame of video fusion, large-size screen monitors spell control Device determines N number of first transparency and N number of second transparency, and N number of first transparency corresponds to each in N number of video frame of the first video The transparency of a video frame, N number of second transparency correspond to the transparency of each video frame in N number of video frame of the second video, N For the positive integer more than 1 or equal to 1；Obtaining the first video and during the second video, when often getting the first video A video frame and the second video a video frame when, by the video of the video frame and the second video of the first video of acquisition Frame is merged according to corresponding first transparency and the second transparency, is obtained a fusion video frame, is regarded until carrying out n times The fusion of frequency frame.Wherein, when being 1 due to the transparency of a video frame, which be to be saturated opaque video frame, one When the transparency of video frame is 0, which is fully transparent video frame, therefore, when a video frame in the first video After being merged with a video frame in the second video frame, the transparency of the fusion video frame merged should be 1.While in order to It can achieve the effect that the transparency of N number of video frame that a video linearly switches, in the first video respectively not in playing process Identical, the transparency of N number of video frame in the second video is also different.Therefore, large-size screen monitors, which spell control device, can pass through following formula (1) N number of first transparency and N number of second transparency are determined：
Wherein, in above-mentioned formula (1), k is k-th of video frame in the N number of video frame for carry out video frame fusion, C1 (k) it is the transparency of k-th of video frame in N number of video frame of the first video, C2(k) in N number of video frame of the second video K-th of video frame transparency.
For example, when N is 4, according to formula (1), which is respectively 3/4,2/4,1/4 and 0, corresponding 4 A second transparency is respectively 1/4,2/4,3/4 and 1.
It should also be noted that, large-size screen monitors, which spell control device, determines that N number of first transparency and the operation of N number of second transparency not only may be used Can also include other modes to include aforesaid way, for example, large-size screen monitors, which spell control device, can receive user manually to the first video The first transparency of each video frame setting and user are manually to each in N number of video frame of the second video in N number of video frame Second transparency of a video frame setting.For example, user is manually to the first transparency point of 4 video frame of the first video setting Not Wei 1/4,1/2,2/3 and 3/4, the second transparency to the setting of 4 video frame of the second video is respectively 3/4,1/2,1/3 and When 1/4, large-size screen monitors, which spell control device, can receive 4 first transparencies and 4 the second transparencies.
Optionally, large-size screen monitors, which spell control device, can also receive pre-set multiple first transparencies of user and multiple second transparent Degree.When the fusion parameters include needing to carry out the quantity N of the video frame of video fusion, which spells control device can will be multiple First transparency is arranged according to sequence from small to large or from big to small, and when multiple first transparencies are according to from small to large When being ranked sequentially, by multiple second transparencies according to being ranked sequentially from big to small, when multiple first transparencies are according to from big To small when being ranked sequentially, by multiple second transparencies according to being ranked sequentially from small to large；Later, the large-size screen monitors spell control device can be with N number of first transparency is obtained from multiple first transparency according to putting in order, and is obtained from multiple second transparency N number of Second transparency.
In addition, spelling control device in large-size screen monitors obtains the first video and during the second video, when often getting the first video When one video frame and a video frame of the second video, regarding for the first video obtained is increased by corresponding first transparency The transparency of frequency frame, and by the transparency of the video frame in the second video of corresponding second transparency reduction acquisition, and will The video frame for the first video increased transparency and the video frame of the second video of reduction transparency are merged, and are obtained one and are melted Close video frame.It is by video frame at the pixel value of each pixel due to increasing transparency and reducing transparency all Reason and realize, therefore, large-size screen monitors spell control device can by the video frame of the video frame of the first video of acquisition and the second video according to Corresponding first transparency and the second transparency are merged by following formula (2), obtain a fusion video frame：
Y (x, y, k)=C1(k)*A(x,y,k)+C2(k)*B(x,y,k) (2)
Wherein, Y (x, y, k) is the pixel value for the pixel that abscissa is x, ordinate is y in k-th of fusion video frame, A (x, y, k) be the first video N number of video frame in abscissa is x, ordinate is y in k-th of video frame pixel pixel Value, B (x, y, k) are the pixel that abscissa is x, ordinate is y in k-th of video frame in N number of video frame of the second video Pixel value.
In embodiments of the present invention, since the operation of all video frame in N number of video frame is identical, and one is regarded The operation of the pixel value of all pixels point is also all identical in frequency frame, therefore, in a video frame for including with the first video It is carried out for the pixel value of a pixel in the individual video frame that the pixel value and the second video of one pixel include Illustrate, for example, when the first transparency of the first video video frame including obtained is 20%, the second video include one Second transparency 80% of a video frame, and the pixel value of a pixel of the first video video frame for including be (2,5, 50) when the pixel value of a pixel of the video frame that, the second video includes is (2,5,100), by regarding in the first video Frequency frame is merged with the video frame in the second video according to formula (2) one by one, obtains pixel in fusion video frame Pixel value is (2,5,90).
It is worth noting that when carrying out video fusion by above-mentioned first way, spelling control device due to large-size screen monitors can be every Get the first video a video frame and the second video a video frame when, by the video frame of the first video of acquisition with The video frame of second video is merged, so as to so that picture nature transition in fusion video, is presented what video linearly switched Effect.
It should be noted that large-size screen monitors spell control device by the video frame of the video frame of the first video of acquisition and the second video according to Corresponding first transparency and the second transparency are merged, and the operation for obtaining a fusion video frame may include not only above-mentioned Mode can also include other modes, can be regarded by corresponding first transparency change acquisition first for example, large-size screen monitors spell control device The transparency of the video frame of frequency, by the video frame of changed first video of transparency directly and the second video video frame into Row fusion obtains a fusion video frame.Alternatively, large-size screen monitors, which spell control device, to change obtain the by corresponding second transparency The transparency of the video frame of two videos, by the direct video with the first video of the video frame of changed second video of transparency Frame is merged, and a fusion video frame is obtained.It that is to say, large-size screen monitors spell control device by the video frame and second of the first video of acquisition The video frame of video passes through formula Y (x, y, k)=C according to corresponding first transparency and the second transparency1(k)*A(x,y,k)+ B(x,y,k).Alternatively, large-size screen monitors spell control device by the video frame of the first video of acquisition with the video frame of the second video according to corresponding First transparency and the second transparency pass through formula Y (x, y, k)=A (x, y, k)+C2(k) * B (x, y, k) are merged, and are obtained One fusion video frame, the embodiment of the present invention are not specifically limited this.
The second way, when fusion parameters include needing to carry out the quantity M of the video frame of video fusion, large-size screen monitors spell control device Third transparency and the 4th transparency are obtained, third transparency is the transparent of M video frame setting of the user for the first video Degree, the 4th transparency are the transparency that user is arranged for M video frame of the second video, third transparency and the 4th transparency It is added and is equal to 1, M for the positive integer more than or equal to 1；During obtaining the first video and the second video, got when often When one video frame of the first video and a video frame of the second video, it can be based on third transparency and the 4th transparency, The video frame of first video of acquisition is merged with the video frame of the second video, obtains a fusion video frame.
It is arranged in advance in manufacture it should be noted that third transparency and the 4th transparency can be large-size screen monitors spelling control devices , can also be that user resets when triggering large-size screen monitors and spelling control device progress video fusion.And the third transparency can be 20%, 50%, 80% etc., the 4th transparency can be 80%, 50%, 20%, as long as meeting third transparency and the 4th transparent Mutually adduction is 1 to degree.Certainly, in practical applications, the third transparency and the 4th transparency can be large-size screen monitors spell control device from It is obtained in history fusion record, the embodiment of the present invention is not specifically limited this.
Wherein, large-size screen monitors spell control device obtaining the first video and during the second video, when often getting the first video When one video frame and a video frame of the second video, the video of the first video obtained can be increased by third transparency The transparency of frame, and the transparency of the video frame by the 4th transparency the second video of reduction, and first will to increase transparency The video frame of video and the video frame of the second video of reduction transparency are merged, and fusion video is obtained.
Due to increasing transparency or reducing transparency handled by the pixel value to each pixel in video frame And realize, therefore, large-size screen monitors, which spell control device, can be based on third transparency and the 4th transparency, by the video of the first video of acquisition Frame with the video frame of the second video merged according to the following equation by (3), obtains the fusion video frame：
Y (x, y)=C1A(x,y)+C2B(x,y) (3)
Wherein, Y (x, y) is the pixel value for merging the pixel that abscissa is x, ordinate is y in video frame, and A (x, y) is The pixel value of abscissa is x, ordinate is y pixel in the video frame of the first video obtained, B (x, y) be the of acquisition The pixel value for the pixel that abscissa is x in the video frame of two videos, ordinate is y, C1For third transparency, C2Thoroughly for the 4th Lightness.
In embodiments of the present invention, since the operation for the pixel value of all pixels point in a video frame is all phase Together, therefore, with the pixel value of a pixel of any one video frame of the first video of acquisition, and times of corresponding second video It is illustrated for the pixel value of one pixel of one video frame.For example, when third transparency is 20%, the 4th transparency It is 80%, and the pixel value of a pixel of the video frame of the first video obtained is (2,5,50), the of corresponding acquisition The pixel value of one pixel of the video frame of two videos is (2,5,100), is based on third transparency 20% and the 4th transparency 80%, by the picture of the pixel value (2,5,50) of the pixel of the video frame of the first video and the pixel of the video frame of the second video Element value (2,5,100) merged according to formula (3), obtain a pixel of the fusion video frame pixel value be (2,5, 90)。
It is worth noting that when carrying out video fusion by the above-mentioned second way, since M is just more than or equal to 1 No matter integer needs to merge how many video frame of the first video with how many video frame of the second video, all only need A third transparency and the 4th transparency are obtained, multiple transparencies are not needed to determine, reduces the process for calculating transparency, simultaneously Calculation amount is alleviated, spells the operation burden of control device to reduce large-size screen monitors, while realizing the fusion of video.
In addition, large-size screen monitors spell control device be based on third transparency and the 4th transparency, by the video frame of the first video of acquisition with The video frame of second video is merged, and the operation for obtaining fusion video frame may include not only aforesaid way, can also include Other modes, for example, large-size screen monitors spell control device can change the transparency for the video frame for obtaining the first video by third transparency, it will The video frame of changed first video of transparency is directly merged with the video frame of the second video, is obtained a fusion and is regarded Frequency frame.Alternatively, large-size screen monitors spell the transparency that control device can change the video frame of the second video obtained by the 4th transparency, it will be saturating The video frame of changed second video of lightness is directly merged with the video frame of the first video, and a fusion video is obtained Frame.It that is to say, large-size screen monitors spell control device and are based on third transparency and the 4th transparency, by the video frame and second of the first video of acquisition The video frame of video passes through formula Y (x, y)=C1* A (x, y)+B (x, y) is merged, and obtains a fusion video frame.Alternatively, Large-size screen monitors spell control device and are based on third transparency and the 4th transparency, by the video of the video frame and the second video of the first video of acquisition Frame passes through formula Y (x, y)=A (x, y)+C2* B (x, y) is merged, and obtains a fusion video frame, the embodiment of the present invention pair This is not specifically limited.
Further, in embodiments of the present invention, large-size screen monitors spell control device by after first video and the second video fusion, can be with Fusion video is played out, other operations can also be carried out to fusion video, for example, fusion video is stored, so as to It subsequently obtains the fusion video and does other processing.
In embodiments of the present invention, when large-size screen monitors spell control device and obtain the first video and the second video, user can be according to certainly Fusion parameters are arranged in the viewing demand of body, improve the flexibility of video fusion.In addition, when the first video and the second video are pressed After being merged according to fusion parameters, the video after the fusion disclosure satisfy that the viewing demand of user, to improve user's viscosity.
Multiple video sources can be accessed by spelling control device due to large-size screen monitors, and being spelled in large-size screen monitors may during control device plays the first video Currently playing video is switched to the second video by the switching that can carry out video from the first video.But in video switching In the process, the second video may can not be temporarily got because of the reasons such as network delay large-size screen monitors spelling control device, causes to occur black Shield phenomenon.Simultaneously as the video content of the first video and the second video differs greatly, video pictures transition may result in not Natural problem.Therefore, above-mentioned video fusion method shown in Fig. 2 can be applied in video switching, to solve video The unnatural problem of the blank screen phenomenon and video pictures transition that occur when switching.Below in conjunction with attached drawing 3A, spelling control device to large-size screen monitors will The operation that currently playing video is switched to the second video from the first video illustrates, and specifically comprises the following steps.
Step 301：When receiving video switching command during playing the first video, it is based on the video switching command The video source of second video source of middle carrying identifies, and obtains the second video.
It should be noted that the video switching command is used to carry out the switching of video source, and the video switching command can be with It is triggered by specified operation by user, which can be clicking operation, slide, voice operating etc..In addition, should Video source mark is used for unique mark video source, and video source mark can be the title, number, MAC of video source (MediaAccess Control, media access control) address etc..
Wherein, large-size screen monitors spell control device and equally will continue to obtain the first video during obtaining the second video, and obtain The fusion parameters that user is arranged for the first video and the second video, and large-size screen monitors spell control device obtain the first video, the second video with And the concrete operations of fusion parameters can refer to above-mentioned steps 302, the embodiment of the present invention no longer repeats this one by one.
Step 302：First video of acquisition and the second video are merged according to fusion parameters, obtain fusion video.
The first video of acquisition and the second video are merged according to fusion parameters it should be noted that large-size screen monitors spell control device Operation can refer to above-mentioned steps 203 operation, that is to say, large-size screen monitors spell control device when carrying out video switching, can be by having The first way of video fusion is carried out in above-mentioned steps 203 and second method merges the first video and the second video.
It is worth noting that when large-size screen monitors spell control device by above-mentioned first way progress video fusion, fusion can be made The effect that video linearly switches is presented in picture nature transition in video, can when the video fusion mode is applied to video switching So that the first video is transitioned into the second video naturally.
For the process that the video that video pictures are presented when visually showing Switch Video linearly switches, the embodiment of the present invention A kind of Parameters variation schematic diagram of the linear handoff scenario of video is shown, referring to Fig. 3 B, before video shows that 0th area indicates to switch over When playing the first video, the transparency for the video frame that the first video includes is 1；Video shows that 1st area indicates to melt in progress video During conjunction, the first video source and the second video source access simultaneously, and C1(k) according to linear decrease, C2(k) linear increment, C1 (k) and C2(k) and be 1, that is, the transparency for merging the video frame of video is 1, to which the first video gradually faded out with the time It has been shown that, and the second video is gradually faded in and displayed with the time.
In addition, since equally the mode of above-mentioned second progress video fusion can be applied in video switching, and should The quantity M for carrying out video fusion can be 1, therefore, when the M is 1, due to regarding a video frame of the first video with second One video frame of frequency carries out the fusion that video can be completed in fusion, without merging multiple video frame one-to-one correspondence, subtracts The process for calculating transparency is lacked, while having alleviated calculation amount, to reduce the operation burden that large-size screen monitors spell control device, has realized simultaneously The natural transition of picture when video switching.
Step 303：It when obtaining a fusion video frame, can stop playing the first video, and start to play to merge and regard Frequency frame after all playing fusion video frame, continues to play the second video, currently playing video is switched from the first video To the second video.
Wherein, by above-mentioned steps 201 it is found that when the buffer area of video source write it is full and when not carrying out the reading of video frame, from The initial position of the buffer area of the video source is risen will currently need the video frame being written to be written again, i.e., current needs is written Video frame covers the video frame having been written into.Therefore, the video frame in buffer area is constantly in more new state.When the large-size screen monitors spell control device It is the video frame not merged in the buffer area of the second video source after video frame whole broadcasting will be merged, therefore, large-size screen monitors are spelled Continue next video frame that control device can be adjacent with the last one video frame of video fusion is carried out since the second video Play the second video.
In embodiments of the present invention, large-size screen monitors spell control device and receive video switching command during playing the first video When, the second video can be obtained, since the content of the first video and the second video may differ greatly, is carrying out video source switching When, it is unnatural to may result in video pictures transition, therefore, the first video can be merged with the second video, is melted Video is closed, and fusion video is played out.Since fusion video includes the first video, to switch from the first video of broadcasting To when playing fusion video, makes video pictures nature transition, improve the efficiency of video playing.In addition, in fusion video playing After, it can also continue to play the second video, due to further including the second video in fusion video, to merge video from broadcasting When being switched to the second video of broadcasting, makes video pictures nature transition, while also ensuring the continuity of video playing, avoid Occurs the case where blank screen in video switch procedure.
Fig. 4 is a kind of block diagram of video fusion device provided in an embodiment of the present invention, referring to Fig. 4, the video play device It being implemented in combination with by software, hardware or both.The device includes：Cache module 401, acquisition module 402 and fusion mould Block 403.
Cache module 401, the video for receiving multipath video source input, by the video reference from the multipath video source Display resolution zooms in and out, and caches the video after scaling, and multipath video source includes the first video source and the second video source；
Acquisition module 402, for obtaining the first video and the second video, and acquisition user for the first video and second The fusion parameters of video setting, the first video are the video from the first video source, and the second video is from the second video source Video；
Fusion Module 403 obtains fusion and regards for merging the first video according to the fusion parameters with the second video Frequently.
Optionally, which is used for：
When the fusion parameters include need carry out video fusion video frame quantity N when, determine N number of first transparency and N number of second transparency, N number of first transparency corresponds to the transparency of each video frame in N number of video frame of the first video, N number of Second transparency correspond to the second video N number of video frame in each video frame transparency, N be more than 1 or equal to 1 just Integer；
During obtaining the first video and the second video, when the video frame and second for often getting the first video When one video frame of video, by the video frame of the video frame and the second video of the first video of acquisition, according to corresponding first Transparency and the second transparency are merged, and a fusion video frame are obtained, until carrying out the fusion of n times video frame.
Optionally, which is additionally operable to：
N number of first transparency and N number of second transparency are determined by following formula：
Wherein, k is k-th of video frame in the N number of video frame for carry out video frame fusion, C1(k) it is the N number of of the first video The transparency of k-th of video frame in video frame, C2(k) it is the transparent of k-th of video frame in N number of video frame of the second video Degree.
Optionally, which is additionally operable to：
By the video frame of the video frame and the second video of the first video of acquisition, according to corresponding first transparency and second Transparency is merged by following formula, obtains a fusion video frame：
Y (x, y, k)=C1(k)*A(x,y,k)+C2(k)*B(x,y,k)
Wherein, Y (x, y, k) is the pixel value for the pixel that abscissa is x, ordinate is y in k-th of fusion video frame, A (x, y, k) be the first video N number of video frame in abscissa is x, ordinate is y in k-th of video frame pixel pixel Value, B (x, y, k) are the pixel that abscissa is x, ordinate is y in k-th of video frame in N number of video frame of the second video Pixel value.
Optionally, which is additionally operable to：
When fusion parameters include needing to carry out the quantity M of the video frame of video fusion, third transparency and the 4th is obtained Transparency, third transparency are the transparency that user is arranged for M video frame of the first video, and the 4th transparency is user's needle To the transparency of the M video frame setting of the second video, it is to be more than or wait that third transparency, which is added with the 4th transparency equal to 1, M, In 1 positive integer；
During obtaining the first video and the second video, when the video frame and second for often getting the first video When one video frame of video, it is based on third transparency and the 4th transparency, by the video frame and second of the first video of acquisition The video frame of video is merged, and a fusion video frame is obtained.
Optionally, which is additionally operable to：
Based on third transparency and the 4th transparency, by the video frame of the video frame and the second video of the first video of acquisition It is merged according to the following equation, obtains the fusion video frame：
Y (x, y)=C1A(x,y)+C2B(x,y)
Wherein, Y (x, y) is the pixel value of abscissa is x, ordinate is y pixel in the fusion video frame, A (x, Y) be the first video obtained video frame in abscissa is x, ordinate is y pixel pixel value, B (x, y) is to obtain The second video video frame in abscissa is x, ordinate is y pixel pixel value, C1For third transparency, C2It is Four transparencies.
Optionally, which is additionally operable to：
Corresponding buffer area is divided to the roads multipath video source Zhong Mei video source；
The video frame that video from the multipath video source includes is scaled to the video frame of same resolution ratio, and will scaling The buffer area of the corresponding video source of video frame write-in afterwards.
In conclusion in embodiments of the present invention, when large-size screen monitors spell control device and obtain the first video and the second video, Yong Huke Fusion parameters are arranged according to the viewing demand of itself, the flexibility of video fusion is improved.In addition, when by the first video and the After two videos are merged according to fusion parameters, the video after the fusion disclosure satisfy that the viewing demand of user, to improve User's viscosity.
It should be noted that：The video fusion device that above-described embodiment provides is when carrying out video fusion, only with above-mentioned each The division progress of function module, can be as needed and by above-mentioned function distribution by different work(for example, in practical application Energy module is completed, i.e., the internal structure of device is divided into different function modules, to complete whole described above or portion Divide function.In addition, the video fusion device that above-described embodiment provides belongs to same design with video fusion embodiment of the method, have Body realizes that process refers to embodiment of the method, and which is not described herein again.
Fig. 5 is that a kind of structure of large-size screen monitors spelling control device 500 for video fusion shown according to an exemplary embodiment is shown It is intended to.
With reference to Fig. 5, it may include following one or more components that large-size screen monitors, which spell control device 500,：Processing component 502, memory 504, power supply module 506, multimedia component 508, audio component 510, the interface 512 of input/output (I/O), sensor module 514 and communication component 516.
Processing component 502 usually control large-size screen monitors spell control device 500 integrated operation, such as with display, data communication, camera behaviour Make and record operates associated operation.Processing component 502 may include one or more processors 520 to execute instruction, with It performs all or part of the steps of the methods described above.In addition, processing component 502 may include one or more modules, convenient for place Manage the interaction between component 502 and other assemblies.For example, processing component 502 may include multi-media module, to facilitate multimedia Interaction between component 508 and processing component 502.
Memory 504 is configured as storing various types of data to support the operation in large-size screen monitors spelling control device 500.These numbers According to example include the message for spelling the instruction of any application program or method operated on control device 500 in large-size screen monitors, picture, depending on Frequency etc..Memory 504 can be realized by any kind of volatibility or non-volatile memory device or combination thereof, such as quiet State random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), the read-only storage of erasable programmable Device (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or light Disk.
The various assemblies that power supply module 506 spells control device 500 for large-size screen monitors provide power supply.Power supply module 506 may include power supply Management system, one or more power supplys and other with for large-size screen monitors spell control device 500 generate, management and distribution associated group of power supply Part.
Multimedia component 508 is included in the screen for one output interface of offer that the large-size screen monitors are spelled between control device 500 and user Curtain.In some embodiments, screen may include liquid crystal display (LCD) and touch panel (TP).If screen includes touching Panel, screen may be implemented as touch screen, to receive input signal from the user.Touch panel includes one or more touches Sensor is touched to sense the gesture on touch, slide, and touch panel.The touch sensor can not only sense touch or cunning The boundary of action, but also detect duration and pressure associated with the touch or slide operation.In some embodiments In, multimedia component 508 includes a front camera and/or rear camera.Control device 500, which is spelled, when large-size screen monitors is in operation mould Formula, when such as screening-mode or video mode, front camera and/or rear camera can receive external multi-medium data. Each front camera and rear camera can be a fixed optical lens system or have focal length and an optical zoom energy Power.
Audio component 510 is configured as output and/or input audio signal.For example, audio component 510 includes a Mike Wind (MIC) spells control device 500 when large-size screen monitors and is in operation mode, when such as call model, logging mode and speech recognition mode, Mike Wind is configured as receiving external audio signal.The received audio signal can be further stored in memory 504 or via Communication component 516 is sent.In some embodiments, audio component 510 further includes a loud speaker, is used for exports audio signal.
I/O interfaces 512 provide interface between processing component 502 and peripheral interface module, and above-mentioned peripheral interface module can To be keyboard, click wheel, button etc..These buttons may include but be not limited to：Home button, volume button, start button and lock Determine button.
Sensor module 514 includes one or more sensors, for spelling the shape that control device 500 provides various aspects for large-size screen monitors State is assessed.For example, sensor module 514 can detect that large-size screen monitors spelled control device 500 opens/closes state, component it is relatively fixed Position, such as the component are the display and keypad that large-size screen monitors spell control device 500, and sensor module 514 can also detect large-size screen monitors spelling It controls device 500 or large-size screen monitors spells the position change of control 500 1 components of device, user spells the presence or do not deposit that control device 500 contacts with large-size screen monitors In the temperature change of large-size screen monitors spelling control 500 orientation of device or acceleration/deceleration and large-size screen monitors spelling control device 500.Sensor module 514 can wrap Proximity sensor is included, is configured to detect the presence of nearby objects without any physical contact.Sensor module 514 Can also include optical sensor, such as CMOS or ccd image sensor, for being used in imaging applications.In some embodiments, The sensor module 514 can also include acceleration transducer, gyro sensor, Magnetic Sensor, pressure sensor or temperature Sensor.
Communication component 516 is configured to facilitate large-size screen monitors and spells the logical of wired or wireless way between control device 500 and other equipment Letter.Large-size screen monitors, which spell control device 500, can access the wireless network based on communication standard, such as WiFi, 2G or 3G or combination thereof.? In one exemplary embodiment, communication component 516 receives the broadcast singal from external broadcasting management system via broadcast channel Or broadcast related information.In one exemplary embodiment, the communication component 516 further includes near-field communication (NFC) module, with Promote short range communication.For example, can be based on radio frequency identification (RFID) technology in NFC module, Infrared Data Association (IrDA) technology surpasses Broadband (UWB) technology, bluetooth (BT) technology and other technologies are realized.
In the exemplary embodiment, large-size screen monitors spell control device 500 can by one or more application application-specific integrated circuit (ASIC), Digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field-programmable gate array It arranges (FPGA), controller, microcontroller, microprocessor or other electronic components to realize, for executing the above method.
In the exemplary embodiment, it includes the non-transitorycomputer readable storage medium instructed, example to additionally provide a kind of Such as include the memory 504 of instruction, the processor 520 that above-metioned instruction can be spelled control device 500 by large-size screen monitors is executed to complete the above method. For example, the non-transitorycomputer readable storage medium can be ROM, random access memory (RAM), CD-ROM, tape, Floppy disk and optical data storage devices etc..
A kind of non-transitorycomputer readable storage medium, when the instruction in the storage medium spells control device by large-size screen monitors When managing device execution so that large-size screen monitors spell control device and are able to carry out above-mentioned video fusion method shown in Fig. 2 or video shown in Fig. 3 switching Method.
One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.

Claims (14)

1. a kind of video fusion method, which is characterized in that the method includes：
The video for receiving multipath video source input, the video reference display resolution from the multipath video source is contracted It puts, and caches the video after scaling, the multipath video source includes the first video source and the second video source；
The first video and the second video are obtained, and obtains user and melts for what first video and second video were arranged Parameter is closed, first video is the video from first video source, and second video is from second video The video in source；
First video is merged with second video according to the fusion parameters, fusion video is obtained.
2. the method as described in claim 1, which is characterized in that it is described by first video and second video according to institute It states fusion parameters to be merged, obtains fusion video, including：
When the fusion parameters include needing to carry out the quantity N of the video frame of video fusion, N number of first transparency and N are determined A second transparency, N number of first transparency correspond to the transparent of each video frame in N number of video frame of first video Degree, N number of second transparency correspond to the transparency of each video frame in N number of video frame of second video, and the N is Positive integer more than 1 or equal to 1；
During obtaining first video and second video, when a video for often getting first video When one video frame of frame and second video, by the video frame of first video of acquisition and regarding for second video Frequency frame is merged according to corresponding first transparency and the second transparency, a fusion video frame is obtained, until carrying out n times The fusion of video frame.
3. method as claimed in claim 2, which is characterized in that N number of first transparency of determination and N number of second transparency, Including：
N number of first transparency and N number of second transparency are determined by following formula：
Wherein, the k is k-th of video frame in the N number of video frame for carry out video frame fusion, the C1(k) it is regarded for described first The transparency of k-th of video frame in N number of video frame of frequency, the C2(k) be second video N number of video frame in the The transparency of k video frame.
4. method as claimed in claim 3, which is characterized in that the video frame of first video by acquisition with it is described The video frame of second video is merged according to corresponding first transparency and the second transparency, obtains a fusion video frame, Including：
By the video frame of the video frame and second video of first video of acquisition, according to corresponding first transparency and Second transparency is merged by following formula, obtains a fusion video frame：
Y (x, y, k)=C1(k)*A(x,y,k)+C2(k)*B(x,y,k)
Wherein, the Y (x, y, k) is the pixel value for the pixel that abscissa is x, ordinate is y in k-th of fusion video frame, The A (x, y, k) is the pixel that abscissa is x, ordinate is y in k-th of video frame in N number of video frame of first video The pixel value of point, the B (x, y, k) are x, indulge and sit for abscissa in k-th of video frame in N number of video frame of second video It is designated as the pixel value of the pixel of y.
5. the method as described in claim 1, which is characterized in that it is described by first video and second video according to institute It states fusion parameters to be merged, obtains fusion video, including：
When the fusion parameters include needing to carry out the quantity M of the video frame of video fusion, third transparency and the 4th is obtained Transparency, the third transparency are the transparency that user is arranged for M video frame of first video, and the described 4th thoroughly Lightness is the transparency that user is arranged for M video frame of second video, and the third transparency is saturating with the described 4th Lightness, which is added, is equal to 1, and the M is the positive integer more than or equal to 1；
During obtaining first video and second video, when a video for often getting first video When one video frame of frame and second video, it is based on the third transparency and the 4th transparency, by the institute of acquisition The video frame for stating the first video is merged with the video frame of second video, obtains a fusion video frame.
6. method as claimed in claim 5, which is characterized in that it is described to be based on the third transparency and the 4th transparency, The video frame of first video of acquisition is merged with the video frame of second video, obtains a fusion video Frame, including：
Based on the third transparency and the 4th transparency, by the video frame and described second of first video of acquisition The video frame of video is merged according to the following equation, obtains the fusion video frame：
Y (x, y)=C1A(x,y)+C2B(x,y)
Wherein, the Y (x, y) is the pixel value for the pixel that abscissa is x, ordinate is y in the fusion video frame, described A (x, y) be first video obtained video frame in abscissa is x, ordinate is y pixel pixel value, the B (x, y) be second video obtained video frame in abscissa is x, ordinate is y pixel pixel value, the C1 For the third transparency, the C2For the 4th transparency.
7. the method as described in claim 1, which is characterized in that described to show the video reference from the multipath video source Resolution ratio zooms in and out, and caches the video after scaling, including：
Corresponding buffer area is divided to the roads multipath video source Zhong Mei video source；
The video frame that video from the multipath video source includes is scaled to the video frame of same resolution ratio, and will be after scaling The corresponding video source of video frame write-in buffer area.
8. a kind of video fusion device, which is characterized in that described device includes：
Cache module, the video for receiving multipath video source input, the video reference from the multipath video source is shown Resolution ratio zooms in and out, and caches the video after scaling, and the multipath video source includes the first video source and the second video source；
Acquisition module for obtaining the first video and the second video, and obtains user for first video and described the The fusion parameters of two videos setting, first video are the video from first video source, and second video is next From the video of second video source；
Fusion Module is melted for merging first video according to the fusion parameters with second video Close video.
9. device as claimed in claim 8, which is characterized in that the Fusion Module is used for：
When the fusion parameters include needing to carry out the quantity N of the video frame of video fusion, N number of first transparency and N are determined A second transparency, N number of first transparency correspond to the transparent of each video frame in N number of video frame of first video Degree, N number of second transparency correspond to the transparency of each video frame in N number of video frame of second video, and the N is Positive integer more than 1 or equal to 1；
During obtaining first video and second video, when a video for often getting first video When one video frame of frame and second video, by the video frame of first video of acquisition and regarding for second video Frequency frame is merged according to corresponding first transparency and the second transparency, a fusion video frame is obtained, until carrying out n times The fusion of video frame.
10. device as claimed in claim 9, which is characterized in that the Fusion Module is additionally operable to：
N number of first transparency and N number of second transparency are determined by following formula：
Wherein, the k is k-th of video frame in the N number of video frame for carry out video frame fusion, the C1(k) it is regarded for described first The transparency of k-th of video frame in N number of video frame of frequency, the C2(k) be second video N number of video frame in the The transparency of k video frame.
11. device as claimed in claim 10, which is characterized in that the Fusion Module is additionally operable to：
By the video frame of the video frame and second video of first video of acquisition, according to corresponding first transparency and Second transparency is merged by following formula, obtains a fusion video frame：
Y (x, y, k)=C1(k)*A(x,y,k)+C2(k)*B(x,y,k)
Wherein, the Y (x, y, k) is the pixel value for the pixel that abscissa is x, ordinate is y in k-th of fusion video frame, The A (x, y, k) is the pixel that abscissa is x, ordinate is y in k-th of video frame in N number of video frame of first video The pixel value of point, the B (x, y, k) are x, indulge and sit for abscissa in k-th of video frame in N number of video frame of second video It is designated as the pixel value of the pixel of y.
12. device as claimed in claim 8, which is characterized in that the Fusion Module is additionally operable to：
When the fusion parameters include needing to carry out the quantity M of the video frame of video fusion, third transparency and the 4th is obtained Transparency, the third transparency are the transparency that user is arranged for M video frame of first video, and the described 4th thoroughly Lightness is the transparency that user is arranged for M video frame of second video, and the third transparency is saturating with the described 4th Lightness, which is added, is equal to 1, and the M is the positive integer more than or equal to 1；
During obtaining first video and second video, when a video for often getting first video When one video frame of frame and second video, it is based on the third transparency and the 4th transparency, by the institute of acquisition The video frame for stating the first video is merged with the video frame of second video, obtains a fusion video frame.
13. device as claimed in claim 12, which is characterized in that the Fusion Module is additionally operable to：
Based on the third transparency and the 4th transparency, by the video frame and described second of first video of acquisition The video frame of video is merged according to the following equation, obtains the fusion video frame：
Y (x, y)=C1A(x,y)+C2B(x,y)
Wherein, the Y (x, y) is the pixel value for the pixel that abscissa is x, ordinate is y in the fusion video frame, described A (x, y) be first video obtained video frame in abscissa is x, ordinate is y pixel pixel value, the B (x, y) be second video obtained video frame in abscissa is x, ordinate is y pixel pixel value, the C1 For the third transparency, the C2For the 4th transparency.
14. device as claimed in claim 8, which is characterized in that the cache module is additionally operable to：
Corresponding buffer area is divided to the roads multipath video source Zhong Mei video source；
The video frame that video from the multipath video source includes is scaled to the video frame of same resolution ratio, and will be after scaling The corresponding video source of video frame write-in buffer area.
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