CN107241611B - A kind of live streaming linkage and live streaming linked system - Google Patents
A kind of live streaming linkage and live streaming linked system Download PDFInfo
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- CN107241611B CN107241611B CN201710388565.5A CN201710388565A CN107241611B CN 107241611 B CN107241611 B CN 107241611B CN 201710388565 A CN201710388565 A CN 201710388565A CN 107241611 B CN107241611 B CN 107241611B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/21805—Source of audio or video content, e.g. local disk arrays enabling multiple viewpoints, e.g. using a plurality of cameras
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
- G06V20/46—Extracting features or characteristics from the video content, e.g. video fingerprints, representative shots or key frames
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
-
- 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
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
- G06V20/44—Event detection
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Studio Devices (AREA)
Abstract
The invention discloses a kind of live streaming linkages, for being broadcast live in linked system, the live streaming linked system includes one or more hot spot video cameras and global video camera, the live streaming linkage includes: hot video reception device, for receiving the video from one or more hot spot video camera and the global video camera；Hot spot determination unit determines hot spot region according to the video；Temperature determination unit, for determining the temperature of the determining hot spot region of the hot spot determination unit；Video camera is recruited device, and the video camera for the hot spot region to be broadcast live is selected and/or adjusted according to the temperature.The present invention further correspondingly provides a kind of live streaming linked system.The hot spot that device and system according to the present invention can be automatically found on competition field is broadcast live.
Description
Technical field
The present invention relates to the live streaming linkage technique of video camera more particularly to a kind of select and control according to in-situ analysis
The live streaming linkage of video camera processed, and live streaming linked system.
Background technique
Currently, the live streaming heavy dependence ground cameraman of true race rule of thumb selects seat in the plane, angle and focusing, then
Artificial selection and switch live source in limited resource by instructor in broadcasting.E-sports or game live streaming are generally limited to live streaming person's
Main perspective tends not to find hot spot region at the first time, but needs the person of live streaming first to find hot spot, then manually take aim at video camera
The quasi- position.
In today that current net cast is more mature, exist a kind of real to selecting and controlling according to in-situ analysis
The needs of the live streaming linked system of body or virtual camera.
Summary of the invention
In order to overcome above-mentioned one of the existing technology or more defect, the present invention provides a kind of real-time dynamic of basis
It analyzes to select and control the live streaming linkage of video camera, and live streaming linked system.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of live streaming linkage, for linkage system to be broadcast live
In system, the live streaming linked system includes one or more hot spot video cameras and global video camera, the live streaming linkage
It include: hot video reception device, for receiving from one or more hot spot video camera and the global video camera
Video；Hot spot determination unit determines hot spot region according to the video；Temperature determination unit, for determining that the hot spot is true
The temperature for the hot spot region that order member determines；Video camera is recruited device, is selected and/or adjusted to be broadcast live according to the temperature
Hot spot region video camera.
A kind of embodiment according to the present invention, the hot spot determination unit includes with lower unit: individual variable tracking is single
Member, for the displacement of track individual variable and behavior；Individual variable event category unit, according to the position of the individual variable, row
To generate sportsman's individual events；Race main body tracking cell, determines the position of race main body；Hot spot region division unit, root
Hot spot region is divided according to the position of sportsman's individual events and the race main body.
A kind of embodiment according to the present invention, the temperature determination unit include: referee's individual events judging unit,
For determining referee's individual events；Event analysis unit is determined according to sportsman's individual events and/or referee's individual events
The event type for the event that each hot spot region occurs；Temperature coefficient distributor is not work together according to the event type
Part distributes different temperature coefficients；Temperature computing unit calculates the temperature of each hot spot region according to the temperature coefficient.
A kind of embodiment according to the present invention, the temperature coefficient allocation unit also obtain the position of the race main body
Information, and be the higher hot spot coefficient of identification region distribution for including race main body.
A kind of embodiment according to the present invention, the video camera recruit device according to the temperature and it is one or
The video camera position arrangement data selection of more hot spot video cameras and global video camera and/or the adjusting hot spot to be broadcast live
The video camera in region.
A kind of embodiment according to the present invention, the temperature determination unit are calculated by the following formula each hot zone
The temperature in domain:
HZ=(ND×CD+NA×CA)×K+VS；
Wherein NDIndicate the quantity in defender in the hot spot region, CDIndicate defended area coefficient, NAExpression is in
The quantity of attacker, C in the hot spot regionAIndicate attack region temperature coefficient, VSIndicate that the temperature of the hot spot region is initial
Value；K indicates the hot value of race main body, is constant in global video camera, according to field condition most in hot spot video camera
Switch in small value and maximum value；
The video camera recruit device selection the highest hot spot region of hot value video camera be broadcast live.
A kind of embodiment according to the present invention, the video camera recruit device in the selection highest hot spot of hot value
After the video camera in region is broadcast live, when hot value sorts and changes, according to the video for each video camera being previously set
The video camera for playing the switching time successively hot spot region to hot value from high to low is broadcast live.
A kind of embodiment according to the present invention, the hot spot video camera are video cameras or virtual camera in kind.
The present invention further correspondingly provides a kind of live streaming linked system, including at least one or more hot spot video cameras and entirely
Office's video camera, and the foregoing live streaming linkage being attached thereto.
Embodiment according to the present invention can select and controlled entity or virtual camera shooting according to in-situ analysis
Machine can automatically select video camera according to the hot spot in race and be broadcast live for being broadcast live in linked system.
Detailed description of the invention
In conjunction with attached drawing, the present invention may be better understood, but attached drawing is only exemplary, and is not to limit of the invention
System.
Fig. 1 shows live streaming linkage block diagram of the invention；
Fig. 2 shows hot spot determination unit block diagrams of the invention；
Fig. 3 shows temperature determination unit block diagram of the invention；
Fig. 4 shows live streaming linkage of the invention for delimiting area centered on scene main body when football match live streaming
A kind of schematic diagram of the embodiment in domain；
Fig. 5 shows the shooting figure of global video camera in one embodiment of the present of invention；
In figure: 1, attack region；2, neutralization zone；3, covered area；100 live streaming linkages；101, hot video connects
Receiving apparatus；102, hot spot determination unit；103, temperature determination unit；104, video camera is recruited device；1021, individual variable is tracked
Unit；1022, individual variable event category unit；1023, race main body tracking cell；1024, hot spot region division unit；
1031, event analysis unit；1032, temperature coefficient allocation unit；1034, temperature computing unit.
Specific embodiment
The embodiment that the present invention will be described in detail with reference to the accompanying drawings and examples.Description in drawings and embodiments is only
It is merely exemplary, is not the limitation to protection scope of the present invention.
Fig. 1 shows the schematic block diagram of live streaming linkage of the invention.As shown in Figure 1, a kind of straight according to the present invention
Broadcast linkage 100, for being broadcast live in linked system, the live streaming linked system include one or more hot spot video cameras and
Global video camera, the live streaming linkage includes: hot video reception device 101, for receiving from one or more
The video of multiple hot spot video cameras and the global video camera；Hot spot determination unit 102 determines hot zone according to the video
Domain；Temperature determination unit 103, for determining the temperature of the determining hot spot region of the hot spot determination unit；Video camera is recruited dress
104 are set, the video camera for the hot spot region to be broadcast live is selected and/or adjusted according to the temperature.The present invention also accordingly provides
A kind of live streaming linked system, including live streaming linkage 100 and one or more hot spot video cameras and global camera shooting
Machine.
Fig. 2 shows the schematic block diagrams of hot spot determination unit of the invention.As shown in Fig. 2, the hot spot determination unit
102 include with lower unit: individual variable tracing unit 1021, for the displacement of track individual variable and behavior；Individual variable event
Taxon 1022 generates sportsman's individual events and/or referee's individual thing according to the position of the individual variable, behavior
Part；Race main body tracking cell 1023, determines the position of race main body；Hot spot region division unit 1024, according to the movement
The position of member's individual events and/or referee's individual events and the race main body divides hot spot region.
Fig. 3 shows the schematic block diagram of temperature determination unit of the invention.As shown in figure 3, the temperature determination unit
103 include: event analysis unit 1031, determines each hot spot according to sportsman's individual events and/or referee's individual events
The event type for the event that region occurs；Temperature coefficient allocation unit 1032 is different event distribution according to the event type
Different temperature coefficients；Temperature computing unit 1034 calculates the temperature of each hot spot region according to the temperature coefficient.
It is schematically illustrated below with reference to the live streaming linkage 100 that specific live scene carries out the present invention.
Embodiment one
Present embodiment illustrates the processes that live streaming linkage of the invention is used for the true live game coverage of football.It is referred to
The present embodiment understands the work and realization of each unit and device of the invention.The present embodiment is only exemplary, and is not pair
Limitation of the invention.Such as the present invention also can be completely applied to the races such as basketball, vollyball.
As shown in figure 4, entire competition field can be divided into attack region 1, neutralization zone 2, covered area 3 for football race,
Race main body is football, and global video camera gets a bird's eye view entire court, captures football and the location information of field player on field.
On football pitch, when football, which crosses neutralization zone 2, enters attack region 1, as shown in Figure 4:
The core attacker for carrying football and the core attack region of core defender are formed by ball carrier；
It is formed by other attacker and surrounding defender and wants attack region several times；
Attacker near offside line and offside line is formed by rear guard line and is in offside state (potential but temporary disablement
Attacker) attacker formed offside line region；
Defender's victory or defeat determinating area is formed by defender goalkeeper and goal position；
Several change between attack and defend regions are formed by defender attacker and attacker defender；
Judge region is formed by the positions such as referee, sideline judge and the visual field；
Attacker's victory or defeat determinating area is formed by goalkeeper attacker and goal position.
In the present embodiment, above each region is hot spot region.The explanation of these hot spot regions is only exemplary,
And it will form different hot spot regions in the different times of match, it is not required that these hot spot regions exist simultaneously.
Pre-set the video camera for competition field and race.It for convenience of description, can in the case where forming hot spot region
Corresponding video camera is named as core attack video camera, offside line video camera, secondary attack video camera one, potential attack region
Video camera, secondary attack video camera two, defender's victory or defeat determinating area video camera, change between attack and defend region video camera, referee take the photograph
Camera, bench for the replacement of a majority video camera etc., can be described as hot spot video camera.
Every group of hot spot video camera can be divided into distant view, middle scape and close shot video camera again, according to being taken in hot spot region pair
The near-far situation of elephant selects video camera to obtain clearly video.
Meanwhile team's admission mouth in court is provided with default camera machine (being also believed to a kind of hot spot video camera), is used
In a kind of video of shooting opposing teams sportsman admission mouth (also can be considered hot spot).
Video receiving apparatus setting is in studio, for receiving from hot spot video camera, global video camera, default camera machine
Video, heat supply point determination unit determines hot spot region.
Hot spot determination unit 102 includes: individual variable tracing unit 1021, for tracking displacement and the row of field player
For；Individual variable event category unit 1022 generates sportsman's individual events and/or judge according to the position of field player, behavior
Member's individual events.Referee's individual events, for example, the gestures such as signal keeps the field, gets a penalty, direct free kick；Sportsman's individual
Event is for example, positioning, attack, defence, sick and wounded etc.；Race main body tracking cell tracks the position of football on field；It draws hot spot region
Sub-unit 1024 divides hot spot region according to the position of sportsman's individual events and/or referee's individual events and football.
Next, temperature determination unit 102 is used to determine the temperature of above-mentioned each hot spot region, comprising:
Event analysis unit 1031 determines each hot spot according to sportsman's individual events and/or referee's individual events
The event type for the event that region occurs, including attack, defence, pause, wound stop, out-of-bounds etc.；
Temperature coefficient allocation unit 1032 is that different event distributes different temperature coefficients according to the event type, should
In embodiment, Number.Defense, Zone.Defense in the temperature coefficient reference table 1 of each zone issue,
The value of Number.Attack, Zone.Attack.Temperature coefficient allocation unit also obtains the location information of football on field, and is packet
Higher temperature coefficient is distributed in the region for including football.
Later, temperature computing unit 1034 calculates the temperature of each hot spot region according to the temperature coefficient
Zone.Heat, Zone.Heat calculation formula are as follows:
DefenseValue=Number.Defense*Zone.Defense；
AttackValue=Number.Attack*Zone.Attack；
Zone.Heat=(DefenseValue+AttackValue) * Key+StartValue.Zone
Wherein, Zone.Heat (HZ) indicate the temperature in the region；The hot spot value of DefenseValue expression defender；
Number.Defense(ND) indicate the quantity in defender in the hot spot region；Zone.Defense(CD) indicate defence
Coefficient of region；The hot spot value of AttackValue expression attacker；Number.Attack(NA) indicate in the hot spot region
The quantity of attacker；Zone.Attack indicates attack region temperature coefficient (CA)；Zone.Heat indicates region temperature；Key
(K) hot value of race main body is indicated；StartValue.Zone(VS) indicate the temperature initial value of the hot spot region, such as institute
Belong to the temperature initial value of attack, defence and neutralization zone.
It can be obtained following formula (1) after above-mentioned calculation formula is simplified, i.e. temperature determination unit can pass through following formula
(1) temperature of each hot spot region is calculated:
HZ=(ND×CD+NA×CA)×K+VS； (1)
Wherein, HZIndicate the temperature in the region；NDIndicate the quantity in defender in the hot spot region；CDIndicate anti-
Imperial coefficient of region；NAIndicate the quantity in attacker in the hot spot region, i.e., above-mentioned, CAIndicate attack region temperature coefficient,
VSIndicate the temperature initial value of the hot spot region；K indicates the hot value of race main body, is constant in global video camera, in heat
Switch in minimum value and maximum value according to field condition in point video camera.
Wherein, StartValue.Zone (VS) can be constant, Key (K) is constant in global video camera；Key(K)
Switch in minimum value and maximum value according to field condition in the other cameras, according to a kind of embodiment, Key (K) is minimum
Value can be set to 1, and maximum value can be set to 100, judge that having within the scope of current camera either with or without football is exactly 100, without just
It is 1.The setting of these values is all exemplary, and is not limitation of the present invention.
In this embodiment, the above-mentioned each parameter setting of each hot spot video camera is as shown in table 1:
Table 1
Region temperature coefficient Zone.Heat is calculated according to the coefficient in above-mentioned formula and table 1, and selects Zone.Heat
It is worth the video of highest video camera acquisition to play to spectators.Specifically as shown in connection with fig. 4 with the present embodiment, left (lower section) sportsman
Holding, the attacker of Road 2 and 2 defence members, right wing (upper road) attacking and defending sportsman is one each, rear guard line sportsman is several ... now
1 is shown in Table in each hot spot region temperature Zone.Heat value.When holding sportsman passes to Road, it is assumed that proprietary position is constant
In the case of, the numerical value core attack video camera Key value in table 1 becomes 1 (because the attacker in the region does not catch), secondary
The Key of attack video camera becomes 100, then it is 101.5 that temperature Zone.Heat, which is exactly core attack video camera, secondary attack is taken the photograph
Camera hot value Zone.Heat becomes 400, at this point, should play out the video of secondary attack video camera.Go up state not on the spot
It substantially change, i.e., it, can be according to current each hot zone when each hot spot region temperature Zone.Heat value sequence does not change
Domain temperature Zone.Heat value sequence, successively the video camera of the hot spot region to hot spot value from high to low is broadcast live.Each video camera
Video playing switching time can be previously set, can also manual adjustment according to demand, when each camera switching of the embodiment
Between as shown in table 2:
Table 2
The video camera recruits device 104 according to the temperature and the video camera machine of hot spot video camera and global video camera
The selection of position arrangement data and/or the video camera for adjusting the hot spot region to be broadcast live.More video cameras can be adjusted to
For the hottest point region on field.Also the focal length etc. of adjustable each video camera, so that hot spot region is clearly broadcast live.
When compete carry out when, by video camera recruit device select to compete first the real-time highest region of Zone.Heat value into
Line trace, and video is played according to the time being arranged in table 2.
When match is interrupted:
If 1, event type be pause, video camera recruit device can be selected first according to pause side troop, pause side into
Line trace；
If 2, event type be it is injured, video camera device of recruiting can select sick and wounded video camera according to Zone.Injury,
And by Timer timing, switched in the region of Zone.Injury and Zone.Heat high；
3, cause match to be interrupted if it is out-of-bounds or other factors, then video camera recruit device can according to Timer timing and
Zone.Heat selects corresponding region.
Next, realizing camera rotation, with clapping by automation video camera regulating mechanism according to venue location.
Embodiment two
As shown in Figure 5, which applies also for the live broadcast of virtual game.
In the embodiment, video camera is using virtual global video camera, virtual hot spot video camera and virtual default camera machine.
Default camera machine is used to shoot position when player has just enter into game or brings back to life, for example, inside LOL and CS
Oneself base camp.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (6)
1. a kind of live streaming linkage, for being broadcast live in linked system, the live streaming linked system includes one or more heat
Point video camera and global video camera, which is characterized in that the live streaming linkage includes:
Hot video reception device, for receiving from one or more hot spot video camera and the global video camera
Video；
Hot spot determination unit determines hot spot region according to the video；
Temperature determination unit, for determining the temperature of the determining hot spot region of the hot spot determination unit；
Video camera is recruited device, and the video camera for the hot spot region to be broadcast live is selected and/or adjusted according to the temperature；
The hot spot determination unit includes with lower unit:
Individual variable tracing unit, for the displacement of track individual variable and behavior；
Individual variable event category unit generates sportsman's individual events and/or sanction according to the position of the individual variable, behavior
The person's of sentencing individual events；
Race main body tracking cell, determines the position of race main body；
Hot spot region division unit, according to sportsman's individual events and/or referee's individual events and the race main body
Position divide hot spot region；
The temperature determination unit includes:
Event analysis unit determines that each hot spot region occurs according to sportsman's individual events and/or referee's individual events
Event event type；
Temperature coefficient allocation unit is that different event distributes different temperature coefficients according to the event type；Described in also obtaining
The location information of race main body, and be the higher hot spot coefficient of hot spot region distribution for including race main body；
Temperature computing unit calculates the temperature of each hot spot region according to the temperature coefficient.
2. live streaming linkage according to claim 1, which is characterized in that the video camera recruits device according to the heat
It the video camera position arrangement data selection of degree and one or more hot spot video camera and global video camera and/or adjusts
The video camera for the hot spot region to be broadcast live.
3. live streaming linkage according to claim 2, which is characterized in that the temperature determination unit passes through following formula
Calculate the temperature of each hot spot region:
HZ=(ND×CD+NA×CA)×K+VS；
Wherein NDIndicate the quantity in defender in the hot spot region, CDIndicate defended area coefficient, NAIt indicates to be in the heat
The quantity of attacker, C in point regionAIndicate attack region temperature coefficient, VSIndicate the temperature initial value of the hot spot region；K table
The hot value for showing race main body is constant in global video camera, in hot spot video camera according to field condition in minimum value and
Switch in maximum value；
The video camera recruit device selection the highest hot spot region of hot value video camera be broadcast live.
4. live streaming linkage according to claim 3, which is characterized in that the video camera recruits device described in the selection
After the video camera of the highest hot spot region of hot value is broadcast live, when hot value sorts and changes, according to what is be previously set
The video camera of the video playing switching time of each video camera successively hot spot region to hot value from high to low is broadcast live.
5. live streaming linkage according to any one of claims 1 to 4, which is characterized in that the hot spot video camera is real
Object video camera or virtual camera.
6. a kind of live streaming linked system, which is characterized in that the live streaming linked system includes at least one or more hot spots and takes the photograph
Live streaming linkage described in camera and global video camera and any one of claims 1 to 5.
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| CN107241611B true CN107241611B (en) | 2019-09-24 |
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| EP3984236B1 (en) | 2019-06-14 | 2024-04-10 | Telefonaktiebolaget LM Ericsson (publ) | A method of providing video content to a production studio by selecting an input video stream from a plurality of wireless video cameras, as well as a corresponding stream controller |
| CN111787243B (en) * | 2019-07-31 | 2021-09-03 | 北京沃东天骏信息技术有限公司 | Broadcasting guide method, device and computer readable storage medium |
| CN111787338A (en) * | 2020-03-09 | 2020-10-16 | 北京理工大学 | Auxiliary design method for sports event live broadcast scheme |
| CN113688321B (en) * | 2021-08-31 | 2023-10-24 | 北京快来文化传播集团有限公司 | Live broadcasting room heat ordering method, system, equipment and storage medium |
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| CN103428461A (en) * | 2013-08-16 | 2013-12-04 | 北京中广上洋科技股份有限公司 | System and method for recording teaching video |
| CN106165393A (en) * | 2014-04-03 | 2016-11-23 | 皮克索洛特公司 | Method and system for automatic television production |
| CN106651952A (en) * | 2016-10-27 | 2017-05-10 | 深圳锐取信息技术股份有限公司 | Football detecting and tracking based video processing method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9202526B2 (en) * | 2012-05-14 | 2015-12-01 | Sstatzz Oy | System and method for viewing videos and statistics of sports events |
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|---|---|---|---|---|
| CN103428461A (en) * | 2013-08-16 | 2013-12-04 | 北京中广上洋科技股份有限公司 | System and method for recording teaching video |
| CN106165393A (en) * | 2014-04-03 | 2016-11-23 | 皮克索洛特公司 | Method and system for automatic television production |
| CN106651952A (en) * | 2016-10-27 | 2017-05-10 | 深圳锐取信息技术股份有限公司 | Football detecting and tracking based video processing method and device |
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