CN113301270B - System and method for synchronously transmitting cloud rebroadcast signals - Google Patents
System and method for synchronously transmitting cloud rebroadcast signals Download PDFInfo
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- CN113301270B CN113301270B CN202110565259.0A CN202110565259A CN113301270B CN 113301270 B CN113301270 B CN 113301270B CN 202110565259 A CN202110565259 A CN 202110565259A CN 113301270 B CN113301270 B CN 113301270B
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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
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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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
- H04N21/6131—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a mobile phone network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to a system and a method for synchronously transmitting cloud rebroadcast signals, wherein the system comprises the following steps: the video acquisition module is used for acquiring a plurality of digital signals on site; the encoder module is connected with the video acquisition module and is used for encoding and processing the digital signal to obtain a network interconnection protocol signal; the synchronous clock module is connected with the encoder module and used for synchronizing a plurality of network interconnection protocol signals; and the signal transmission module is connected with the encoder module and used for transmitting the synchronized network interconnection protocol signal to a cloud broadcasting guide platform. The invention adopts the encoder module and the synchronous clock module to encode and convert the digital signal and the clock signal, ensures the clock synchronization during the acquisition and improves the stability of the output signal, thereby stably realizing the synchronous cloud rebroadcasting video signal and transmitting.
Description
Technical Field
The invention relates to the technical field of signals and communication, in particular to a system and a method for synchronously transmitting cloud rebroadcast signals.
Background
In the era of the 5G technology and the outbreak of video rebroadcasting, how to implement the rebroadcasting of high-quality videos anytime and anywhere, especially videos meeting the requirements of high-definition and ultra-definition television live broadcasting, undoubtedly become the key point and difficulty of the development of the cloud rebroadcasting technology. The method is different from the traditional television rebroadcasting, requires the equipment such as a rebroadcasting vehicle and the like, and is also different from the current fire-heat mobile live broadcast technology (mainly completing audio and video acquisition, special effect processing, coding, packaging, stream pushing, transcoding, distribution, decoding, playing and the like). The requirements of cloud relaying are: light-weight equipment, high-definition video, a high-efficiency synchronizer, a simple director function and the like.
Fig. 1 is a schematic diagram of conventional video signal synchronization, and as shown in fig. 1, the conventional video signal synchronization is performed in the following scenes: the front end is provided with a plurality of machine positions, a field signal is collected at the same time, a plurality of signals are converged to the broadcasting guide station, the broadcasting guide station outputs switching signals, and if the front end signal does not have a unified clock synchronization signal, the output signals can generate frame skipping, jitter and other problems.
In fig. 1, each camera has a time synchronization interface, and can access to the same time encoder to perform time calibration, where the time is encoded synchronously with output signals (SDI, HDMI, etc.), and when the director outputs, the director performs automatic calibration of time points to perform switching output.
However, in the cloud relay technology architecture, the location where the camera collects and the director station are located at different geographical positions, the digital signals (SDI, HDMI, etc.) output by the camera need to be IP-converted in the middle, and are received to the remote director station through IP streams for controlling and outputting, but the remote director car replaces the traditional on-site relay car, a synchronous time code generator is not provided, and time codes are lost when the digital signals are IP-converted, so that the stability of the output signals is deteriorated.
Disclosure of Invention
The invention aims to provide a system and a method for synchronously transmitting cloud rebroadcast signals, which can improve the stability of output signals.
In order to achieve the purpose, the invention provides the following scheme:
a system for synchronously transmitting cloud rebroadcast signals comprises:
the video acquisition module is used for acquiring a plurality of digital signals on site;
the encoder module is connected with the video acquisition module and is used for encoding and processing the digital signal to obtain a network interconnection protocol signal;
the synchronous clock module is connected with the encoder module and used for synchronizing a plurality of network interconnection protocol signals;
and the signal transmission module is connected with the encoder module and used for transmitting the synchronized network interconnection protocol signal to a cloud broadcasting guide platform.
Preferably, the synchronous clock module comprises a global positioning system time service unit; the global positioning system time service unit is used for receiving satellite time service signals and synchronizing the plurality of synchronized network interconnection protocol signals according to the satellite time service signals.
Preferably, the synchronous clock module comprises a high-precision time synchronization protocol unit; the high-precision time synchronization protocol unit is used for receiving a synchronization clock signal and synchronizing a plurality of synchronized network interconnection protocol signals according to the synchronization clock signal.
Preferably, the synchronous clock module includes an oven controlled crystal oscillator unit, and the oven controlled crystal oscillator unit is configured to generate a relative clock signal and synchronize the plurality of synchronized internetworking protocol signals according to the relative clock signal.
Preferably, the encoder module comprises:
the encoder is connected with the video acquisition module and is used for encoding the digital signal;
and the transcoding unit is connected with the encoder and used for transcoding the encoded signal to obtain the network interconnection protocol signals with different code rates.
Preferably, the signal transmission module includes at least one of a 5G mobile network unit, a wired network unit, and a plurality of wireless ad hoc network units:
the 5G mobile network unit is connected with the encoder module, and the 5G mobile network unit is used for sending the synchronized network interconnection protocol signal to the cloud program director through a 5G network;
the wired network unit is connected with the encoder module and is used for sending the synchronized network interconnection protocol signal to the cloud broadcasting guide platform through a wired network;
the number of the wireless ad hoc network units is at least one; the wireless ad hoc network unit is connected with the encoder module and used for sending the synchronized internet protocol signal to the cloud broadcasting station through the action hotspot.
A method for cloud rebroadcast signal synchronous transmission is applied to a system for cloud rebroadcast signal synchronous transmission, and comprises the following steps:
collecting a plurality of digital signals of a field;
coding and processing the digital signal to obtain a network interconnection protocol signal;
synchronizing a plurality of said internetworking protocol signals;
and transmitting the synchronized network interconnection protocol signal to a cloud broadcasting station.
Preferably, the encoding and processing the digital signal to obtain a network interconnection protocol signal specifically includes:
encoding the digital signal;
and transcoding the coded signals to obtain the network interconnection protocol signals with different code rates.
Preferably, the transmitting the internet protocol signal to a cloud director station includes:
and sending the network interconnection protocol signal to the cloud broadcasting station by adopting at least one transmission mode of a 5G network, a mobile hotspot and a wired network.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a system and a method for synchronously transmitting cloud rebroadcast signals, wherein the system comprises the following steps: the video acquisition module is used for acquiring a plurality of digital signals on site; the encoder module is connected with the video acquisition module and is used for encoding and processing the digital signal to obtain a network interconnection protocol signal; the synchronous clock module is connected with the encoder module and used for synchronizing a plurality of network interconnection protocol signals; and the signal transmission module is connected with the encoder module and used for transmitting the synchronized internet protocol signal to a cloud broadcasting station. The invention adopts the encoder module and the synchronous clock module to encode and convert the digital signal and the clock signal, ensures the clock synchronization during the acquisition and improves the stability of the output signal, thereby stably realizing the synchronous cloud rebroadcast video signal transmission.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a diagram illustrating a conventional video signal synchronization in the prior art;
fig. 2 is a schematic diagram of the system according to embodiment 1 of the present invention.
Fig. 3 is a flowchart of a method in embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a system and a method for synchronously transmitting cloud rebroadcast signals, which can improve the stability of output signals.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1:
fig. 2 is a schematic diagram of system operation in embodiment 1 provided by the present invention, and as shown in fig. 2, a system for cloud relay signal synchronous transmission according to the present invention includes:
and the video acquisition module is used for acquiring a plurality of on-site digital signals.
And the encoder module is connected with the video acquisition module and used for encoding and processing the digital signal to obtain a network interconnection protocol signal.
And the synchronous clock module is connected with the encoder module and used for synchronizing a plurality of the network interconnection protocol signals.
And the signal transmission module is connected with the encoder module and used for transmitting the synchronized network interconnection protocol signal to a cloud broadcasting guide platform.
Specifically, the encoder module, the synchronous clock module and the signal transmission module are integrated in a backpack and used as a 5G cloud broadcasting mobile aggregation backpack.
In this embodiment, an ip stream signal (internet protocol signal) is used as data to be transmitted to the terminal.
Optionally, the synchronization of the video signal acquisition is completed by a synchronous clock module, and the synchronous clock module includes multiple time service modes and is specific to multiple scenes.
Preferably, the synchronous clock module comprises a global positioning system time service unit; the global positioning system time service unit is used for receiving satellite time service signals and synchronizing the plurality of network interconnection protocol signals according to the satellite time service signals.
Specifically, when the outdoor GPS signal is excellent, a GPS time service module (global positioning system time service unit) may be used; the GPS time service module can simultaneously receive signals of 4-8 satellites in the visual field range at any time, internally receives and acquires two time signals, one is the absolute time of a synchronous pulse signal and UCT, the time can be determined after calculation, and then the time output can be maintained by receiving the signal of one satellite. The time service precision is nanosecond.
Preferably, the synchronous clock module comprises a high-precision time synchronization protocol unit; the high-precision time synchronization protocol unit is used for receiving a synchronous clock signal and synchronizing the plurality of network interconnection protocol signals according to the synchronous clock signal.
Specifically, when the indoor GPS signal is unstable, PTP (IEEE 1588 clock synchronization) may be adopted; a Precision Time Protocol PTP (Precision Time Protocol) is a Protocol for synchronizing Time and frequency of standard ethernet terminal devices, and is also called IEEE 1588, which is abbreviated as 1588. 1588 is divided into two versions 1588v1 and 1588v2, 1588v1 can only reach sub-millisecond time synchronization precision, and 1588v2 can reach sub-microsecond synchronization precision.
Preferably, the synchronous clock module includes an oven controlled crystal oscillator unit, and the oven controlled crystal oscillator unit is configured to generate a relative clock signal and synchronize the plurality of internetworking protocol signals according to the relative clock signal.
Specifically, when both GPS and indoor network signals are unstable, a relative clock is generated using an OCXO (oven controlled crystal oscillator unit), and in principle, the camera only needs to synchronize the relative clock, and the relative clock can synchronize the clock signal to the transcoding module, thereby facilitating use of subsequent modules. Preferably, the encoder module comprises:
and the encoder is connected with the video acquisition module and is used for encoding the digital signal.
And the transcoding unit is connected with the encoder and used for transcoding the encoded signal to obtain the network interconnection protocol signals with different code rates.
Specifically, the encoder module mainly completes conversion from a digital signal to an ip stream signal, and outputs high and low bit rates for supporting different subsequent scenes. If the acquisition end completes acquisition synchronization, a transcoding unit in the backpack can complete transcoding requirements of time synchronization, and meanwhile, the requirement of video transmission on bandwidth is high, especially for ultra-high definition video (4K requires 45M and 8K requires about 120M), and during transmission, if signals are not broadcast, such as a director, low bit rate can be adopted for output.
Preferably, the signal transmission module comprises at least one of the following:
the 5G mobile network unit is connected with the encoder module and used for sending the synchronized network interconnection protocol signal to the cloud broadcasting guide platform through a 5G network;
the at least one wireless ad hoc network unit is connected with the encoder module and used for sending the synchronized network interconnection protocol signal to the cloud broadcasting guide platform through the action hotspot;
and the wired network unit is connected with the encoder module and used for sending the synchronized network interconnection protocol signal to the cloud broadcasting guide platform through a wired network.
As an alternative embodiment, in the case that the wired network is limited, the IP video stream may be transmitted through the 5G mobile network. If the number of people on site is too many, the mobile network is blocked up, 5G is adopted to transmit and can be influenced, at the moment, a wireless ad hoc network module can be adopted to complete the transmission of signals on site, a self-organized WiFi network is formed between the backpack and each backpack, wiFi signals can be transmitted by each backpack, the transmission of the WiFi signals is completed by wireless communication between the backpack and each backpack, and a certain backpack can be accessed to a wired network to transmit the signals.
Because the transmission of high and low code rates has the characteristic of transmitting one route of the cloud and one route of the director, when the remote director performs signal switching, the high-precision consistency of the two routes of signals is required to be ensured. Because the transcoding module has completed the encoding of clock synchronization and is high and low bit rate synchronization, and the transmission of high and low bit rate video may cause time code asynchronization, during switching, the clock signal (or the time corresponding to the frame) to be switched needs to be sent to the switching module with high bit rate for switching.
Example 2:
fig. 3 is a flowchart of a method in embodiment 2, and as shown in fig. 3, the present invention further provides a method for synchronously transmitting a cloud broadcast signal, which is applied to a system for synchronously transmitting a cloud broadcast signal, where the method includes:
step 100: collecting a plurality of digital signals of a field;
step 200: coding and processing the digital signal to obtain a network interconnection protocol signal;
step 300: synchronizing a plurality of said internetworking protocol signals;
step 400: and transmitting the synchronized network interconnection protocol signal to a cloud broadcasting guide platform.
Preferably, the encoding and processing the digital signal to obtain a network interconnection protocol signal specifically includes:
encoding the digital signal;
and transcoding the coded signals to obtain the network interconnection protocol signals with different code rates.
Preferably, the transmitting the internet protocol signal to the cloud director station includes:
and sending the synchronized network interconnection protocol signal to the cloud broadcasting guide platform by adopting at least one transmission mode of a 5G network, a mobile hotspot and a wired network.
The invention has the following beneficial effects:
1. the invention adopts the encoder module and the synchronous clock module to encode and convert the digital signal and the clock signal, ensures the clock synchronization during the acquisition and improves the stability of the output signal, thereby realizing the stable synchronous cloud rebroadcast video signal and transmission.
2. When the wired network is not smooth, the wireless network can be adopted for signal transmission, so that the stability and flexibility of data transmission are improved.
3. The invention improves the synchronism between high and low code rates when the director switching is carried out.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The method disclosed by the embodiment corresponds to the system disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the system part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (5)
1. A system for synchronously transmitting cloud broadcasting signals is characterized by comprising:
the video acquisition module is used for acquiring a plurality of digital signals on site;
the encoder module is connected with the video acquisition module and is used for encoding and processing the digital signal to obtain a network interconnection protocol signal;
the synchronous clock module is connected with the encoder module and used for synchronizing a plurality of network interconnection protocol signals;
the signal transmission module is connected with the encoder module and used for transmitting the synchronized network interconnection protocol signal to a cloud broadcasting guide platform;
the encoder module, the synchronous clock module and the signal transmission module are integrated in a backpack and used as a 5G cloud broadcasting mobile aggregation backpack;
the signal transmission module comprises at least one of a 5G mobile network unit, a wired network unit and a wireless ad hoc network unit:
the 5G mobile network unit is connected with the encoder module, and the 5G mobile network unit is used for sending the synchronized network interconnection protocol signal to the cloud program director through a 5G network;
the wired network unit is connected with the encoder module and is used for sending the synchronized network interconnection protocol signal to the cloud broadcasting guide platform through a wired network;
the number of the wireless ad hoc network units is at least one; the wireless ad hoc network unit is connected with the encoder module and is used for sending the synchronized network interconnection protocol signal to the cloud broadcasting guide platform through a mobile hotspot;
transmitting the IP video stream through a 5G mobile network under the condition that a wired network is limited; if the number of people on the spot is too many, the mobile network is jammed, 5G transmission is influenced, at the moment, a wireless ad hoc network unit is adopted to complete the transmission of signals on the spot, an ad hoc WiFi network is formed between the backpacks, each backpack can transmit WiFi signals, the transmission of the WiFi signals is completed by wireless communication between the backpacks, and a certain backpack can be accessed to a wired network to transmit the signals;
the synchronous clock module comprises a global positioning system time service unit; the global positioning system time service unit is used for receiving satellite time service signals and synchronizing a plurality of network interconnection protocol signals according to the satellite time service signals;
the synchronous clock module comprises a high-precision time synchronization protocol unit; the high-precision time synchronization protocol unit is used for receiving a synchronous clock signal and synchronizing a plurality of network interconnection protocol signals according to the synchronous clock signal;
the synchronous clock module comprises an oven controlled crystal oscillator unit, and the oven controlled crystal oscillator unit is used for generating relative clock signals and synchronizing a plurality of network interconnection protocol signals according to the relative clock signals.
2. The system for synchronous transmission of cloud relayed signals according to claim 1, wherein the encoder module comprises:
the encoder is connected with the video acquisition module and is used for encoding the digital signal;
and the transcoding unit is connected with the encoder and is used for transcoding the encoded signal to obtain the network interconnection protocol signals with different code rates.
3. A method for synchronously transmitting a cloud broadcasting signal, which is applied to the system for synchronously transmitting a cloud broadcasting signal according to any one of claims 1 to 2, and the method comprises:
collecting a plurality of digital signals of a site;
coding and processing the digital signal to obtain a network interconnection protocol signal;
synchronizing a plurality of said internetworking protocol signals;
and transmitting the synchronized network interconnection protocol signal to a cloud broadcasting guide platform.
4. The method according to claim 3, wherein the encoding and processing of the digital signal to obtain a network interconnection protocol signal specifically includes:
encoding the digital signal;
and transcoding the coded signals to obtain the network interconnection protocol signals with different code rates.
5. The method for synchronously transmitting the cloud broadcasting signal according to claim 3, wherein the transmitting the synchronized internet protocol signal to the cloud broadcasting station includes:
and sending the synchronized network interconnection protocol signal to the cloud broadcasting guide platform by adopting at least one transmission mode of a 5G network, a mobile hotspot and a wired network.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007118347A1 (en) * | 2006-04-14 | 2007-10-25 | Zte Corporation | A cooperate broadcast system structure for cooperate the wire and wireless and a method thereof |
| CN112601097A (en) * | 2021-03-02 | 2021-04-02 | 中国传媒大学 | Double-coding cloud broadcasting method and system |
| CN112601033A (en) * | 2021-03-02 | 2021-04-02 | 中国传媒大学 | Cloud rebroadcasting system and method |
| CN213094332U (en) * | 2021-03-02 | 2021-04-30 | 中国传媒大学 | Rebroadcasting vehicle and cloud rebroadcasting vehicle |
-
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- 2021-05-24 CN CN202110565259.0A patent/CN113301270B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007118347A1 (en) * | 2006-04-14 | 2007-10-25 | Zte Corporation | A cooperate broadcast system structure for cooperate the wire and wireless and a method thereof |
| CN101371576A (en) * | 2006-04-14 | 2009-02-18 | 中兴通讯股份有限公司 | Cooperation broadcast system structure with wired and wireless cooperation, and method thereof |
| CN112601097A (en) * | 2021-03-02 | 2021-04-02 | 中国传媒大学 | Double-coding cloud broadcasting method and system |
| CN112601033A (en) * | 2021-03-02 | 2021-04-02 | 中国传媒大学 | Cloud rebroadcasting system and method |
| CN213094332U (en) * | 2021-03-02 | 2021-04-30 | 中国传媒大学 | Rebroadcasting vehicle and cloud rebroadcasting vehicle |
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