CN105635592B - External video camera wireless alerts system, suggestion device - Google Patents
External video camera wireless alerts system, suggestion device Download PDFInfo
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- CN105635592B CN105635592B CN201610209819.8A CN201610209819A CN105635592B CN 105635592 B CN105635592 B CN 105635592B CN 201610209819 A CN201610209819 A CN 201610209819A CN 105635592 B CN105635592 B CN 105635592B
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- 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
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
-
- 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
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Devices (AREA)
- Closed-Circuit Television Systems (AREA)
Abstract
External video camera wireless alerts system provided by the invention includes host, emitter and suggestion device.Suggestion device is installed on video camera.This External video camera wireless alerts system is sent to emitter after encoding the switch prompting signal that instructor in broadcasting dispatches cut bank by host.Emitter is by being sent to suggestion device for encoded signal, suggestion device judges after being decoded to encoded signal, after being confirmed as the control signal of itself, issue prompt information, prompt cameraman's current camera just occupied, preventing cameraman, malfunction causes broadcast accident without knowing it, simple and practical in structure.
Description
Technical field
The present invention relates to video camera instructor in broadcasting fields, in particular to a kind of External video camera wireless alerts system, prompt
Device.
Background technique
In media production system (such as studio and mobile control room), the quantity in video camera news road be it is certain, marquis is not sometimes
It is able to satisfy program making, External video camera is needed to enter manufacturing system, to meet production demand.For example, the production in one 6 news road
System, (this video camera big city uses band CCU (Camera Control Unit to the just only 6 sets of video cameras being capable of providing
Camera control unit.This video camera is designed exclusively for manufacturing system, and function is very complete, and call, Tally have entirely.But price is non-
Chang Anggui.), but in a program making, instructor in broadcasting needs 8 video camera positions, just needs in addition external 2 ENG at this time
(Electronic News Gathering, electronic news gathering.Belong to camcorder, generally only vision signal
Into manufacturing system, do not have call and tally.) video camera.Tally (the cut bank switch prompting information) in manufacturing system
System plays very important effect, it usually appears in camera head, video camera viewfinder in the form of character or indicator light
With system nodes equal on video wall, is prompted respectively to host, camera shooting and studio producer, report to current video and cut
What the PGM signal that zapping is cut out is.The staff for coordinating each post by visual cues is that system is essential
A part, whether especially video camera prompt cameraman's current camera just called, to prevent cameraman from shooting fault.
For external increased such as ENG video camera, general manufacturing system, which does not have, provides Tally information alert, needs to lead to
The mode of external Tally connecting line is crossed to realize, but under normal conditions, video camera and manufacturing system have 100 meters even more
Remote distance can bring many inconvenience in work if independent line.In addition have and much temporarily built with ENG video camera
Mini-system, general between video camera and cut bank only by video, (vision signal has: composite video CVBS, digital video SDI
Or HD video HD SDI) signal wire connection.Cameraman's camera shooting currently in use now is dispatched and informed mainly by intercom
Seat in the plane.Often there are various faults, for example instructor in broadcasting forgets to have cried out or cried out slowly, there are also live back drops too big, cameraman accidentally listens or
It does not hear, at this moment broadcasting and having switched to the video camera, video camera also leads to broadcast accident in shaking.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of External video camera wireless alerts system, it is above-mentioned to improve
Problem.
To achieve the goals above, the technical solution adopted by the present invention is as described below:
A kind of External video camera wireless alerts system, including host, emitter and suggestion device, the host with it is described
Emitter communication connection, the emitter and the suggestion device communicate to connect, and the suggestion device is set to video camera
On, wherein
The host is transmitted to described for receiving switch prompting signal after handling the switch prompting signal
Emitter；
The emitter, for emitting the switch prompting signal to the suggestion device；
The suggestion device generates prompt information for judging whether when receiving the switch prompting signal.
Preferably, the host includes signal acquisition module and coding module, and the emitter includes transmitting module,
In,
The signal acquisition module is for receiving the switch prompting signal and being sent to the switch prompting signal described
Coding module；
The coding module obtains encoded signal, and the coding is believed for encoding the switch prompting signal
Number it is sent to the transmitting module；
The transmitting module is used to the encoded signal received being sent to the suggestion device.
Preferably, the suggestion device includes receiving module, decoder module, judgment module and the first light emitting module, wherein
The receiving module is for receiving the encoded signal and the encoded signal being sent to decoder module；
The decoder module obtains decoded signal for being decoded to the encoded signal, and by the decoded signal
It is sent to the judgment module；
The judgment module is used to drive first light emitting module according to the decoded signal.
Preferably, the judgment module is for judging whether the decoded signal is the corresponding prompt of the control judgment module
Device, if it is, judgment module sends the first drive command to the first light emitting module, the first light emitting module of driving shines；Such as
Fruit is not that the first light emitting module of driving does not shine.
Preferably, the suggestion device further includes the second light emitting module, second light emitting module and the receiving module
Connection, second light emitting module be used for the extinguishing when receiving module receives encoded signal, and the receiving module not
It shines when receiving encoded signal.
Preferably, the quantity of the suggestion device is multiple, the emitter into multiple suggestion devices wherein one
A suggestion device sends encoded signal.
Preferably, the emitter sends encoded signal to multiple suggestion devices.
Preferably, the suggestion device includes shell, connection structure, antenna and switch, and the connection structure, is opened antenna
The connection of shell described in Guan Junyu, the suggestion device are connect by the connection structure with video camera, and the antenna is for receiving
The encoded signal that emitter is sent switchs the working condition for controlling suggestion device.
A kind of suggestion device, the suggestion device are arranged on video camera, and establish and wirelessly communicate with an emitter, this is mentioned
Showing device includes the receiving module being successively electrically connected, decoder module, judgment module and the first light emitting module, wherein
The receiving module is used for the encoded signal that receiving and transmitting unit is sent, and the encoded signal is after a host code
It is sent to the emitter；
The decoder module obtains decoded signal, and the decoded signal is sent out for being decoded to the encoded signal
It send to the judgment module；
The judgment module is used to drive first light emitting module according to the encoded signal.
Preferably, the judgment module is for judging whether the decoded signal is used to control that the judgment module to be corresponding mentions
Showing device, if it is, judgment module sends the first drive command to the first light emitting module, the first light emitting module of driving shines；
If it is not, the first light emitting module of driving does not shine.
External video camera wireless alerts system provided by the invention includes host, emitter and suggestion device.Prompt dress
It sets and is installed on video camera.Be sent to transmitting dress after the switch prompting signal that instructor in broadcasting's cut bank issues being encoded by host
It sets, encoded signal is sent to suggestion device again by emitter, and suggestion device judges after being decoded to encoded signal, really
After thinking the control signal of itself, prompt information is issued, prompts cameraman's current camera to be currently being used, prevents cameraman from existing
Accident is broadcasted caused by malfunction in unwitting situation, it is simple and practical in structure.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows a kind of composition schematic diagram of External video camera wireless alerts system provided by the embodiment of the present invention.
Fig. 2 shows a kind of functional module frameworks of External video camera wireless alerts system provided by the embodiment of the present invention
Figure.
Fig. 3 shows a kind of knot of the suggestion device of External video camera wireless alerts system provided by the embodiment of the present invention
Structure schematic diagram.
Main element symbol description:
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
During television program designing, it will use multiple cameras and shot from multi-angle.General use respectively is being taken the photograph
The mode mutually switched between camera is shot.During instructor in broadcasting, when switching instructor in broadcasting is switched to a certain video camera, if
There is no prompt information prompt his camera signal of cameraman just when occupied, cameraman may be in order to find better picture
Face and shake video camera currently in use, be not just available in the picture of shaking.Occur if it is during TV station is broadcast live
This situation shakes and was then defined as broadcast accident more than 5 seconds.
Since existing manufacturing system can not provide additional prompt system for external ENG video camera, so instructor in broadcasting exists
When propagating information to the cameraman of External video camera, generally by the way of intercom or headset, this mode is easy to appear
Information transmitting fault, is unfavorable for carrying out the work.In view of this, inventor proposes the embodiment of the present invention and mentions by studying for a long period of time
The External video camera wireless alerts system of confession.Specific introduction is done to the present invention below by specific embodiment.
Referring to Fig. 1, being the composition schematic diagram of External video camera wireless alerts system 100 provided in an embodiment of the present invention.
External video camera wireless alerts system 100 provided in this embodiment includes host 110, emitter 120 and suggestion device 130.
The suggestion device 130 is arranged on video camera 140.Host 110 and emitter 120 communicate to connect, which can be
Wired connection is also possible to be wirelessly connected, and the present embodiment is preferably wired connection, and host 110 is that emitter 120 provides electricity
Source output, emitter 120 have saved space without additional installation power supply.The distance between host 110 and emitter 120
Outer beyond 1000 meters, external direct current 5V--36V power supply power supply can also be used in emitter 120.In order to make host 110 and transmitting dress
Set that 120 work are more stable, the power supply of host 110 uses the power supply mode of main power supply, reliable and stable.
Wire length between host 110 and emitter 120 can be greater than 500 meters, can be in extremely complicated place
It uses, such as in concert scene, farther out, and scene is through excessive stifled for the positional distance concert floor that mobile control room is parked
In the case that barrier shield shields, truck position is relayed by the way that host 110 to be set to, and emitter 120 can be installed in performance
Can be live, host 110, which is not limited by distance and shielding to emitter 120, sends signal.
For host 110 for receiving switch prompting signal, the source of the switch prompting signal, which can be, performs in a radio or TV programme indoor production
System is also possible to the manufacturing system on mobile control room or the switch prompting signal in other media production systems, the present embodiment
It does not limit this, switch prompting signal is mainly used for prompting cameraman, and system is occupying the video camera of cameraman's operation
140, in order to which cameraman is ready, relaying process is avoided to make a fault.After host 110 receives switch prompting signal,
The switch prompting signal is encoded, the encoded signal after coding is then sent to emitter 120.Host
Mode that 110 pairs of switch prompting signals are encoded multiplicity, can be by PPM (Pulse Position Modulation,
Pulse position modulation) mode or PCM (Pulse Code Modulation, pulse code modulation) even other codings
Mode, it is not limited in the embodiment of the present invention.
Emitter 120 preferably uses and wirelessly sends encoded signal, emitter 120 and suggestion device 130
The distance between can be greater than 1000 meters, substantially increase transmission range.
It should be noted that emitter 120 may include but unlimited to the mode that suggestion device 130 sends encoded signal
In following manner: first way is that tranmitting frequency range can be selected from 10MHZ -5.8GMHZ.The second way one transmitting
Device 120 sends encoded signal to multiple suggestion devices 130 of same frequency.Two emitters 120 of the third mode are used simultaneously
Two different frequencies send the encoded signal of identical (for more secure and reliable) to the received suggestion device 130 of multiple bifrequencies,
It is also possible to the encoded signal of different program of two instructors in broadcasting, two sets of different-styles of production simultaneously (can).The present embodiment is preferably
The second way, by code matching method, fills prompt all after code between all suggestion device 130 and emitter 120
Set the encoded signal that 130 equal receiving and transmitting units 120 are sent.The frequency that emitter 120 uses is 2.4GMHZ.For first
Kind mode, as long as the Radio Management Regulation that frequency used in emitter 120 and suggestion device 130 meets country is implemented just
It can.For the encoded signal that the second way, emitter 120 emit, all suggestion devices 130 can be received.For
The third mode, the encoded signal suggestion device 130 that emitter 120 emits can receive, and be the with second of difference
Three kinds use two emitters 120 and are sent out simultaneously with different frequencies and the active and standby road direction suggestion device 130 of different angle point
Identical encoded signal is penetrated, suggestion device 130 also receives for bifrequency, and the frequency and coding mode of corresponding emitter 120 are
It can.In embodiments of the present invention, it is preferable that use the second way.
Suggestion device 130 can be decoded encoded signal after the encoded signal for receiving the transmission of emitter 120,
The coding mode of decoded mode corresponding host 110, host 110 are encoded using which kind of mode, then suggestion device 130 is using correspondence
Decoding process be decoded.In the present embodiment, host 110 is encoded using multichannel low and high level mode, each
The high level in the corresponding channel of suggestion device 130.After decoding, decoded signal is obtained, which is identified and is judged, is sentenced
Whether the decoded signal that breaks is in the corresponding channel of suggestion device 130 and level.When suggestion device 130 judges that the decoding is believed
It number is control 130 channel of suggestion device and level, then suggestion device 130 generates prompt information.The prompt information can be text,
It is also possible to the modes such as shine, flash, it is not limited in the embodiment of the present invention.
It referring to figure 2., is the functional module framework figure of External video camera wireless alerts system provided in an embodiment of the present invention.
In this embodiment, it is preferred that host 110 includes signal acquisition module 111 and coding module 112, emitter 120 includes hair
Module 121 is penetrated, suggestion device 130 includes receiving module 131, decoder module 132, judgment module 133 and the first light emitting module
134, receiving module 131 is connect with decoder module 132, and judgment module 133 connects with decoder module 132, the first light emitting module 134
It connects.
In this example, news road is preferably 9, can provide switch prompting signal simultaneously for 9 video cameras.Manufacturing system
After the distribution of signal acquisition module 111 and the processing of low and high level that 9 switch prompting signals pass through host 110, and by the switching
Standby signal is sent to coding module 112 by signal acquisition module 111.The switch prompting signal news road and host of manufacturing system
The news road of 110 signal acquisition module 111 corresponds.
The decoder module 132 of suggestion device 130 include 9 roads Ge Xun, 9 roads Ge Xun and manufacturing system of decoder module 132 with
9 roads Ge Xun between signal acquisition module 111 and 9 roads Ge Xun one between signal acquisition module 111 and coding module 112
One is corresponding.In the decoder module 132 of each suggestion device 130, judgment module 133 connects the different news roads of decoder module 132,
For example, will be prompted to the number of device 130 is 1-9, the news road number of decoder module 132 is also 1-9, then sentencing in No. 1 suggestion device
Disconnected module connects No. 1 news road, and the judgment module in No. 2 suggestion devices connects No. 2 news roads, and so on.
When needing to control a certain generation of suggestion device 130 prompt information, then manufacturing system is right by the suggestion device 130
The news road answered sends switch prompting signal to signal acquisition module 111.Signal acquisition module 111 receives switch prompting signal,
After the allocated low and high level processing, coding module 112 is sent to by corresponding news road.Coding module 112 is used for according to preparatory
The coding mode of setting encodes switch prompting signal, obtains encoded signal, and the encoded signal is sent to transmitting mould
Block 121, the mode of transmission can be by it is wired can also be by wireless, the embodiment of the present invention is sent out by the way of wired connection
It send.Preferably, it is connected between host 110 and emitter 120 by three core microphone cords, three core microphone cords hold in relaying process
Easily find, it is readily replaceable when connecting failure.
Transmitting module 121 is used for after receiving the encoded signal, which is sent to connecing for suggestion device 130
Receive module 131.Receiving module 131 is sent to decoder module 132 after receiving encoded signal, by the encoded signal.Decoding
Module 132 is used for after receiving encoded signal, is decoded to the encoded signal, is obtained decoded signal, and the decoding is believed
Number it is sent to corresponding news road, each suggestion device 130 has only connect one of channel in 9 channels.If the prompt
The news road of device 130 is connected with judgment module 133, then judgment module 133 is in the decoded signal for receiving the transmission of decoder module 132
Afterwards, judge whether the decoded signal is used to control the corresponding suggestion device 130 of judgment module 133, if it is, judgment module
133 send the first drive command to the first light emitting module 134, and the first light emitting module 134 of driving shines；If it is not, then judgement
Module 133 sends the second drive command to the first light emitting module 134, and the first light emitting module 134 of driving does not shine.Specific mode
Can be the first drive command is a high level, and the second drive command is a low level, and low and high level is in signal acquisition module 111
It is completed after distribution, the standby signal with low and high level is fed to coding module 112 and is encoded, the interior solution in decoder module 132
Code comes out.Photographer sees that suggestion device 130 shines, then can learn that video camera 140 is currently occupied.
Preferably, suggestion device 130 further includes the second light emitting module 135, the second light emitting module 135 and receiving module 131
Electrical connection, when receiving module 131 is not received by encoded signal, the second light emitting module 135 shines.When receiving module 131 connects
When receiving encoded signal, the second light emitting module 135 of control extinguishes.
It referring to figure 3., is a kind of suggestion device 130 of External video camera wireless alerts system provided in an embodiment of the present invention
Structural schematic diagram.In embodiments of the present invention, suggestion device 130 is warning light, including shell 136, connection structure 137, day
Line 138 and switch 139.Connection structure 137, antenna 138, switch 139 are connect with shell 136.Shell 136 is preferably using modeling
Material shell body, light practical, the transparency is strong, waterproof durable.
Connection structure 137 is for connecting suggestion device 130 and video camera 140.Antenna 138 is used for receiving and transmitting unit 120
Diversified forms can be used in the encoded signal of transmission, antenna 138, for example are built in shell 136, or stretch out shell 136, this implementation
Example does not limit this.Switch 139 is used to control the working condition of suggestion device 130, for example opens and closes.
Fig. 2 is please referred to, the first light emitting module 134 is the LED light for being set to enclosure interior, it is preferable that LED light choosing
With red.Second light emitting module 135 is the LED light for being set to shell outer bottom, in order to distinguish the first light emitting module 134, second
Light emitting module 135 preferably uses blue LED lamp.The embodiment of the present invention is to the first light emitting module 134 and the second light emitting module 135
The quantity of the LED light of use is without limitation.
In conclusion External video camera wireless alerts system 100 provided in an embodiment of the present invention includes host 110, transmitting
Device 120 and suggestion device 130.Host 110 is sent to emitter after encoding the switch prompting signal that instructor in broadcasting switches
120, encoded signal is sent to therewith to the suggestion device 130 after code, 130 pairs of coding letters of suggestion device by emitter 120 again
Judged after number being decoded, after being confirmed as the control signal of itself, issues prompt information, prompt cameraman's current camera
Just occupied, prevent cameraman from broadcasting accident caused by malfunction without knowing it.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. a kind of External video camera wireless alerts system, which is characterized in that described including host, emitter and suggestion device
Suggestion device includes receiving module, decoder module, judgment module and the first light emitting module, the emitter and the host and
The receiving module communicates to connect, and the receiving module is connect with the decoder module, the judgment module and the decoding
Module, first light emitting module are all connected with, and the suggestion device is set on video camera, wherein
The host, for receiving the switch prompting signal of instructor in broadcasting's cut bank sending, to the switch prompting signal using height
Level mode is encoded to obtain encoded signal, and the encoded signal is transmitted to the emitter；
The emitter, for emitting the encoded signal to the suggestion device；
The receiving module is for receiving the encoded signal；
The decoder module obtains decoded signal for being decoded to the encoded signal；
The judgment module is used to judge whether the decoded signal is in the suggestion device according to the decoded signal corresponding
Channel and level, if the decoded signal is in the corresponding channel of the suggestion device and level, drive it is described first hair
Optical module shines.
2. External video camera wireless alerts system according to claim 1, which is characterized in that the host includes that signal obtains
Modulus block and coding module, the emitter include transmitting module, wherein
The signal acquisition module is for receiving the switch prompting signal and the switch prompting signal being sent to the coding
Module；
The coding module obtains encoded signal, and the encoded signal is sent out for encoding the switch prompting signal
It send to the transmitting module；
The transmitting module is used to the encoded signal received being sent to the suggestion device.
3. External video camera wireless alerts system according to claim 2, which is characterized in that the judgment module is for sentencing
Whether the decoded signal that breaks is the corresponding suggestion device of the control judgment module, if it is, judgment module shines to first
Module sends the first drive command, and the first light emitting module of driving shines；If it is not, the first light emitting module of driving does not shine.
4. External video camera wireless alerts system according to claim 2, which is characterized in that the suggestion device further includes
Second light emitting module, second light emitting module are connect with the receiving module, and second light emitting module is used to receive mould
Extinguishing when block receives encoded signal, and shine when the receiving module does not receive encoded signal.
5. External video camera wireless alerts system according to claim 2, which is characterized in that the quantity of the suggestion device
To be multiple, one of suggestion device of the emitter into multiple suggestion devices sends encoded signal.
6. External video camera wireless alerts system according to claim 2, which is characterized in that the emitter is to multiple
Suggestion device sends encoded signal.
7. External video camera wireless alerts system according to claim 1, which is characterized in that the suggestion device includes shell
Body, connection structure, antenna and switch, the connection structure, antenna, switch are connect with the shell, and the suggestion device is logical
It crosses the connection structure to connect with video camera, the antenna is used for the encoded signal that receiving and transmitting unit is sent, and switchs for controlling
The working condition of suggestion device.
8. a kind of suggestion device, which is characterized in that the suggestion device is arranged on video camera, and establishes wirelessly with an emitter
Communication, the suggestion device include the receiving module being successively electrically connected, decoder module, judgment module and the first light emitting module,
In,
The receiving module is used for the encoded signal that receiving and transmitting unit is sent, and the encoded signal is through a host using height electricity
Square formula is sent to the emitter after encoding to the switch prompting signal that instructor in broadcasting's cut bank issues；
The decoder module obtains decoded signal, and the decoded signal is sent to for being decoded to the encoded signal
The judgment module；
The judgment module is used to judge whether the decoded signal is in the suggestion device according to the decoded signal corresponding
Channel and level, if the decoded signal is in the corresponding channel of the suggestion device and level, drive it is described first hair
Optical module shines.
9. suggestion device according to claim 8, which is characterized in that the judgment module is for judging that the decoded signal is
It is no to be used to control the corresponding suggestion device of the judgment module, if it is, judgment module sends first to the first light emitting module
Drive command, the first light emitting module of driving shine；If it is not, the first light emitting module of driving does not shine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610209819.8A CN105635592B (en) | 2016-04-06 | 2016-04-06 | External video camera wireless alerts system, suggestion device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106973299A (en) * | 2017-03-31 | 2017-07-21 | 三峡大学 | A kind of live state shows system and method |
| CN107948665B (en) * | 2017-11-27 | 2020-09-29 | 广州华多网络科技有限公司 | Switching prompting method and device in live video and mobile terminal |
| CN108632637B (en) * | 2018-05-11 | 2020-04-28 | 浙江大学 | SDI signal sensing-based video live broadcast automatic start-stop method |
| CN110620909A (en) * | 2019-09-23 | 2019-12-27 | 上海东方传媒技术有限公司 | Digital Tally system |
| CN111917938B (en) * | 2020-07-30 | 2023-02-10 | 上海电力大学 | Camera shooting prompt system with field interaction function |
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