CN115314478A - Full IP audio and video system applied to financial system - Google Patents
Full IP audio and video system applied to financial system Download PDFInfo
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Abstract
The invention relates to the technical field of audio and video communication, and discloses an all-IP audio and video system applied to a financial system. The invention adopts the audio and video network transmission protocol of NDI to replace the traditional SDI signal transmission, thus realizing IP and IT of the whole technical system; the invention truly realizes the media super-fusion, realizes low cost, high image quality, low time delay and rapid deployment, realizes complete IP transformation on the traditional media, and perfectly interfaces various broadcasting platforms such as the Internet and the like.
Description
Technical Field
The invention relates to the technical field of audio and video communication, in particular to an all-IP audio and video system applied to a financial system.
Background
At present, the traditional financial system, especially the video content updating in the financial network is performed by manual operation, the workload is large, and the updating period is long. Moreover, the video programs of the financial system are updated in an off-line paper circulation mode, are checked layer by each management department, and are manually copied by workers, so that the program updating period is long, the timeliness is poor, the updating frequency is low, and the workload of the workers of the financial system is increased. Meanwhile, centralized supervision is lacked, and managers cannot master the playing conditions of various financial websites in real time.
IP, cloud computing, and big data are key technologies in the converged media age, and the national triple play strategy plan has already been implemented. While the mobile network and the internet are developed vigorously, how a financial system utilizes a new technology to make up a short board of the financial system, expand the service range and deal with the integration of three networks is a serious challenge for the financial people. Therefore, research on a financial system integrating a media playing control technology, innovating a service concept, integrating related service resources, constructing a brand new service chain, realizing refined and intelligent management and control of video programs, converting financial service organizations including various financial websites into an intelligent multimedia display screen, and providing a financial media service platform with timeliness, safety and temperature for customers is urgently needed; meanwhile, the workload of workers is reduced, and the updating frequency and content timeliness of the financial system video are improved.
In summary, developing an all-IP audio/video system applied to a financial system to truly implement media super-fusion, implement low cost, high image quality, low delay and rapid deployment of audio/video broadcast control of the financial system, and implement complete IP transformation on financial media so that the financial media can be perfectly connected to various broadcast platforms such as the internet has become a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide an all-IP audio/video system applied to a financial system so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an all-IP audio/video system applied to a financial system is based on NDI and adopts an audio/video network transmission protocol of NDI, and is characterized by comprising a transmission module, an access module, a scheduling module, a monitoring module, a LIVE manufacturing module, a broadcasting module, a safety module, a recording module, a storage module, a post-manufacturing module and a distribution module, wherein,
the transmission module is used for realizing real-time return of mobile signals and high-bandwidth signal return;
the access module is used for receiving and converging internet signal streams and converting received signals into NDI signals;
the scheduling module adopts an NDI-based matrix router to realize switching scheduling of signals;
the monitoring module is used for monitoring the NDI signal and giving a signal alarm when a frame loss is found;
the LIVE making module adopts an online making tool set to carry out on-site editing and making on the NDI signal;
the broadcasting module adopts an NDI master control broadcasting system to carry out real-time streaming broadcasting and simultaneously realizes the state monitoring of all broadcasting processes;
the safety module is used for ensuring the broadcasting safety;
the recording module adopts a centralized recording system based on NDI to realize file recording aiming at the NDI signal;
the storage module is used for storing the NDI signals recorded by the recording module;
the post-production module adopts an Adobe Premiere-based online editing system to realize online editing of the NDI signals recorded by the recording module;
the distribution module is used for realizing the conversion of the NDI signal and pushing the converted signal to a third-party platform in real time.
Preferably, the transmission module adopts a 5G-SRT multi-path aggregation video transmission knapsack mode, a mobile phone SRT stream pushing mode or an Internet video platform mode, wherein,
the 5G-SRT multi-path aggregation video transmission backpack mode provides a multi-network fusion communication channel based on 5G and/or 4G links by utilizing a multi-link intelligent aggregation technology and an SRT video transmission technology, and transmits 4K and/or high-definition video signals with low delay and high image quality to an access module;
the mobile phone SRT flow pushing mode adopts an SRT flow pushing mode to realize real-time transmission of signals to the access module;
the internet video platform mode adopts an RTMP protocol to transmit the internet video to the access module.
Preferably, the access module receives the converged internet signal stream, which includes an RTMP, HLS, SRT, DVB-UDP, webRTC or other internet signal stream;
the access module supports the functions of signal loss monitoring and safety gaskets, supports the broadcasting of the gaskets when the network signals are lost, and automatically recovers the signals when the network recovers;
in the access module, SRT signal flow passes through the streaming media server to realize one-transmission and multi-reception, and a user does not need to have a public network address; meanwhile, the localization deployment of the SRT streaming media server is provided, and the low-delay application based on the Internet is really realized.
Preferably, the function supported by the NDI-based matrix router in a full routing manner includes:
the CPU, the memory and the bandwidth of the service are not occupied in the switching process, and the power-off direct connection of the server is realized;
all NDI signals in the local area network are displayed, and grouping display can be performed according to the equipment to which the NDI signals belong;
setting names of the output NDI signals, and grouping the NDI signals to match different application targets;
switching single-path signals and switching groups, and realizing one-key emergency switching aiming at one group of signals;
monitoring each path of source signal and target signal through software;
and the main-standby binding and multi-picture linkage are realized to realize the main-standby switching of the NDI signal.
Preferably, the monitoring module can set multiple picture types at will, can set the NDI signal, name and picture quality of each picture, and can start and stop all pictures or a single picture in a unified way;
the monitoring module supports signal monitoring and gives a signal alarm when a video frame loss is found;
the LIVE production module supports an NDI switching table, NDI matting, CG editing and picture-in-picture packaging connection.
Preferably, the NDI total control broadcasting system comprises a list-arranging central control unit and a broadcasting service process unit, wherein,
the order-editing central control unit is used for monitoring the states of all the broadcasting processes, and comprises the steps of monitoring a plurality of NDI broadcasting service processes on a plurality of servers and reflecting whether the processes die in real time;
the list editing central control unit supports playing list editing of each playing process, selects audio and video files and NDI signals in various mainstream formats to edit lists, and automatically obtains the duration of the video files and the addresses of the NDI signals;
the editing central control unit supports 3 modes of sequential delay, timing inter cut and timing sequential delay;
the bill editing central control unit supports the copying of the bill editing according to the day, week and month;
the list-editing central control unit supports grouping of each broadcasting channel to achieve synchronization of grouping and editing;
the list editing central control unit supports the addition of emergency statistics to each broadcasting channel or a group of broadcasting channels, a user designs the subtitle form of emergency notification, and modifies emergency characters in a central control interface to perform one-key up-down notification;
the broadcasting service process unit supports that the serial list on the current day can be read to broadcast the program by opening the click list reading unit;
the broadcasting service process unit supports NDI broadcasting with high-definition pictures or 4K pictures according to configuration software and a unified frame rate;
the broadcasting service process unit adopts a FULL NDI mode, wherein the transmission rate of the high-definition video signal is 100Mbps, and the transmission rate of the 4K signal is 300Mbps;
the broadcasting service process unit supports that the next video or NDI signal of the CUE can be automatically switched when the current program is broadcasted, and the next program can be automatically switched in a seamless frame precision manner when the broadcasting time point is reached;
the broadcasting service process unit supports automatic playing of the gasket picture when no video or NDI signal exists;
the broadcasting service process unit supports that the last frame can be automatically played when the frame is lost, and the gasket is automatically switched when the count reaches 25 frames;
the broadcasting service process unit supports the superposition of station captions according to the setting;
the broadcasting service process unit supports the superposition of emergency broadcasting floating captions;
the broadcast service process unit supports synchronous output of the hardware IO card and the NDI signal.
Preferably, the listing module includes a listing central control unit and a listing service process unit, wherein,
the receiving and recording central control unit is used for monitoring the states of all the broadcasting processes, and comprises the steps of monitoring a plurality of NDI receiving and recording service processes on a plurality of servers and reflecting whether the processes die in real time;
the receiving and recording central control unit supports the arrangement of a receiving and recording schedule for each receiving and recording process;
the recording central control unit supports the replication of the schedule according to day, week and month;
the receiving and recording central control unit supports grouping of each receiving and recording channel to achieve group scheduling list synchronization;
the receiving and recording central control unit supports remote NDI preview of a received and recorded baseband signal;
the receiving and recording service process unit supports the input of NDI/SDI signals and detects the frame loss condition of the NDI signals in real time;
the receiving and recording service process unit supports NDI output of default support baseband signals, low-bit-rate real-time preview based on NDI is provided for central control software, and operation, maintenance and configuration are facilitated;
the recording service process unit supports file recording aiming at NDI signals and supports a song cutting function, namely if a user wants to edit immediately in the recording process, a song cutting button can be clicked, a video can be stored for one section immediately, and frames between the recorded video and the current video are continuous;
the recording service process unit supports the recording of SD, HD and 4K;
in the receiving and recording service process unit, a 4K signal supports the color gamut of H265 bt2020, and the recording support GPU realizes multi-path synchronous recording according to a single machine;
the receiving and recording service process unit supports signal receiving and recording according to the scheduled schedule;
the listing service process unit supports recording locally and synchronous migration.
Preferably, the distribution module supports the input of the NDI/SDI signal and detects the frame loss condition of the NDI signal in real time;
the distribution module supports RTMP, SRT and DVB-UDP push streams;
the distribution module supports an RTMP and SRT streaming media server based on the Ali cloud on the Internet to realize signal distribution;
the distribution module supports butt joint of the RTMP and each large Internet live broadcast platform;
the distribution module supports the function of one compiling and multiple sending;
the distribution module supports the conversion of DVB-UDP NDI signals into UDPSTPS signals of DVB standard, realizes the seamless connection of NDI signals and cable television signal standard, and realizes the synchronous broadcast of new media and traditional media;
the distribution module supports the function of a non-NDI signal gasket, and the STANDBY heartbeat detection and the main-STANDBY switching of the push flow.
Preferably, in the post-production module, a plug-in is built in Adobe Premiere to realize management of the recorded materials;
the online editing system refreshes the newly-entered recorded materials in real time;
the online editing system can submit and store, realize linkage with the receiving and recording server, realize storage of the receiving and recording server, and automatically refresh the material library, realize editing of programs;
completing the clipping of the online clipping system, submitting a packaging server based on Adobe Media Encode, and realizing the packaging and export in an interconnected grid mode;
and the online clipping system submits the content to a third-party packaging server to realize the content generation in a fixed mode by selecting mode synthesis.
Preferably, the security module includes an NDI-based delayed play-out mode and an NDI stream maintenance one-out-of-many mode, wherein,
the NDI-based time-delay broadcasting mode supports the input and output of NDI signals, supports the self-definition of picture quality, supports the lossless storage, supports the real-time acquisition of frame loss data of video signals, supports the simultaneous viewing of an original picture and a delayed picture, and delays 1 hour to the maximum;
in the NDI flow maintaining one-out-of-multiple mode, NDI signals are monitored and output in real time, and are sequentially switched backwards after frame loss is found and received for 2 seconds;
the technology based on NDI Router is adopted to support power-off direct connection, and a used link is not influenced under the condition that software is closed;
and the memory function is supported, and the reset automatically loads the setting of the last shutdown.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the audio and video network transmission protocol of NDI to replace the traditional SDI signal transmission, thus realizing IP and IT of the whole technical system; the invention truly realizes the media super-fusion, realizes low cost, high image quality, low time delay and quick deployment, realizes complete IP transformation on the traditional media, and perfectly interfaces with each broadcasting platform such as the Internet and the like.
Drawings
Fig. 1 is a schematic view of the structural framework of the present invention.
Detailed Description
Referring to fig. 1, in an embodiment of the present invention, an all-IP audio/video system applied to a financial system, which is based on NDI and adopts an audio/video network transmission protocol of NDI, includes a transmission module, an access module, a scheduling module, a monitoring module, a LIVE production module, a broadcasting module, a security module, a receiving and recording module, a storage module, a post-production module, and a distribution module,
the transmission module is used for realizing real-time return of the mobile signal and high-bandwidth signal return;
the access module is used for receiving and converging internet signal streams and converting received signals into NDI signals;
the scheduling module adopts a matrix router based on NDI to realize switching scheduling of signals;
the monitoring module is used for monitoring the NDI signal and giving a signal alarm when frame loss is found;
the LIVE making module adopts an online making tool set to carry out on-site editing and making on the NDI signal;
the broadcasting module adopts an NDI master control broadcasting system to carry out real-time streaming broadcasting and simultaneously realizes the state monitoring of all broadcasting processes;
the safety module is used for ensuring the broadcasting safety;
the recording module adopts a centralized recording system based on NDI to realize file recording aiming at the NDI signal;
the storage module is used for storing the NDI signals recorded by the recording module;
the post-production module adopts an Adobe Premiere-based online editing system to realize online editing of the NDI signals recorded by the recording module;
the distribution module is used for realizing the conversion of the NDI signal and pushing the converted signal to a third-party platform in real time.
Further, the transmission module adopts a 5G-SRT multi-path aggregation video transmission knapsack mode, a mobile phone SRT stream pushing mode or an internet video platform mode, wherein,
the 5G-SRT multi-path aggregation video transmission backpack mode provides a multi-network fusion communication channel based on 5G and/or 4G links by utilizing a multi-link intelligent aggregation technology and an SRT video transmission technology, and transmits 4K and/or high-definition video signals with low delay and high image quality to an access module;
the mobile phone SRT flow pushing mode adopts the SRT flow pushing mode to realize the real-time transmission of signals to the access module;
the internet video platform mode adopts an RTMP protocol to transmit the internet video to the access module.
The parameters of the 5G-SRT multi-path aggregation video transmission backpack comprise: the main chip adopts Hua Shi Hai Si chip; 4K and high-definition image quality is supported; ultra-low delay, wherein the return delay of the cross-network high-definition video at different places is less than 800 milliseconds; the requirement on a receiving end network is low, a stable network is provided, and a public network IP does not need to be matched; the system is provided with 6 USB, and the maximum support is that 7 channels of 6 paths of 5G/4G networks and 1 path of wired broadband are aggregated; the method has HD-SDI input, and the highest support is 1080/60P input; the method is provided with HDMI input, and the highest support is 4K 2160/30P input; supporting a call; supporting H.264 and H.265 coding and supporting the maximum code stream 40M; various coding outputs such as RTMP, RTSP, SRT, NDIHX and the like are supported; the internal battery continues the journey for 3 hours, and the external battery is supported to supply power.
In the mobile phone SRT stream pushing mode, the mobile phone adopts the integration of third-party software, and the SRT stream pushing mode is adopted to realize the real-time signal transmission back to the studio; the mobile phone plug flow uses plug flow-easy software to support android and IOS; plug flow viewing uses VLC handset version. And the plug-flow software directly sets the STR server on the cloud, directly transmits the signal code of the camera to the studio, the studio receives the signal code through the convergence conversion software, and the delay is stabilized within 3 seconds after testing.
Further, the access module receives the converged internet signal stream, which includes an RTMP, HLS, SRT, DVB-UDP, webRTC, or other internet signal stream;
the access module supports the functions of signal loss monitoring and safety gaskets, supports the broadcasting of the gaskets when network signals are lost, and automatically recovers the signals when the network recovers;
in the access module, SRT signal flow passes through the streaming media server to realize one-transmission and multi-reception, and a user does not need to have a public network address; meanwhile, the localization deployment of the SRT streaming media server is provided, and the low-delay application based on the Internet is really realized.
Wherein, aiming at the SRT and RTMP which have lower delay than the VMIX and other similar products under the same network condition, the actual measurement is between 1 and 2 seconds; supporting file circular broadcasting and decoding based on a GPU; the file signals and the stream signals can be converted into NDI signals and SDI signals in real time; in the conversion process, the signal can be converted into a 4K signal, and the highest support is 8K; and the return of the field call signal is supported.
Further, the function supported by the matrix router based on the NDI in a full routing manner includes:
the CPU, the memory and the bandwidth of the service are not occupied in the switching process, and the power-off direct connection of the server is realized;
all NDI signals in the local area network are displayed, and grouping display can be performed according to the equipment to which the NDI signals belong (the number of paths is not limited);
setting the name of the output NDI signal and grouping the NDI signals to match different application targets, such as decoder, multi-picture and play-out (number of output paths is not limited);
switching single-path signals and switching groups, and realizing one-key emergency switching aiming at one group of signals;
monitoring each path of source signal and target signal through software;
and the main-standby binding and multi-picture linkage are realized to realize the main-standby switching of the NDI signal.
Further, the monitoring module can set the multi-picture type arbitrarily, such as 4-picture, 6-picture, 9-picture, 16-picture, 24-picture, 36-picture; the NDI signal, name and picture quality of each picture can be set, the multi-picture supports the preview of low code rate, namely, aiming at the FULLNDI, the low code rate can be monitored in a preview mode to reduce the bandwidth, and more NDI pictures can be watched at one time (the technology unique to NEWTECH); all pictures or a single picture can be opened and closed uniformly;
the monitoring module supports signal monitoring and gives a signal alarm when a video frame loss is found;
the LIVE production module supports NDI switchboards, CG editing, NDI matting and picture-in-picture packaging connections, wherein,
characteristics of NDI switching table and CG editing include: the switching of NDI, local audio and files is supported; supporting various transition special effects; support for multi-track audio tuning; output supporting NDI; CG editing is supported; support for dynamic CG effects; the caption is output in a self-adaptive mode of HD, 4K and 8K; software supports deployment on demand; selecting the outputs of HD, 4K and 8K according to the performance of the equipment; the method supports multi-channel NDI 4K low-bit-rate and low-power-consumption previewing, and outputs in an original format, namely, when a multi-window previewing picture is watched, the NDI low-bit-rate, low-delay and low-power-consumption signals are the signals of 300Mbps source picture quality when PVW and PGM are selected;
the characteristics of NDI matting and pip packaging wiring include: support for NDI signals, files; one-key image matting and adjustment and storage of data are supported; output supporting NDI; the caption is output in a self-adaptive mode of HD, 4K and 8K; the software supports deployment on demand; selecting the output of HD, 4K and 8K according to the performance of the equipment; picture-in-picture, multi-user handover is supported.
Furthermore, the NDI master control broadcasting system comprises a list-editing central control unit and a broadcasting service process unit, wherein,
the order-editing central control unit is used for monitoring the states of all broadcasting processes, and comprises the steps of monitoring a plurality of NDI broadcasting service processes on a plurality of servers and reflecting whether the processes die in real time;
the list editing central control unit supports playing list editing of each playing process, selects audio and video files and NDI signals in various mainstream formats to edit lists, and automatically obtains the duration of the video files and the addresses of the NDI signals;
the editing central control unit supports 3 modes of sequential delay, timing inter cut and timing sequential delay;
the bill editing central control unit supports the copying of the bill editing according to the day, week and month;
the editing central control unit supports grouping of each broadcasting channel to realize grouping and editing synchronization;
the list-editing central control unit supports adding emergency statistics to each broadcast channel or a group of broadcast channels, a user designs the subtitle form of emergency notification, emergency characters are modified in a central control interface, and one-key up-down notification is carried out;
the broadcasting service process unit supports that the serial list on the current day can be read to broadcast the program by opening the click list reading unit;
the broadcasting service process unit supports NDI broadcasting with high definition or 4K according to configuration software and a unified frame rate;
the broadcasting service process unit adopts a FULL NDI mode, wherein the transmission rate of the high-definition video signal is 100Mbps, and the transmission rate of the 4K signal is 300Mbps;
the broadcasting service process unit supports that the next video or NDI signal of the CUE can be automatically switched when the current program is broadcasted, and the next program can be automatically switched in a seamless frame precision manner when the broadcasting time point is reached;
the broadcasting service process unit supports automatic playing of the gasket picture when no video or NDI signal exists;
the broadcasting service process unit supports that the last frame can be automatically played when the frame is lost, and the gasket is automatically switched when the count reaches 25 frames;
the broadcasting service process unit supports the superposition of station captions according to the setting;
the broadcasting service process unit supports the superposition of emergency broadcasting floating captions;
the broadcast service process unit supports synchronous output of the hardware IO card and the NDI signal.
Further, the receiving and recording module comprises a receiving and recording central control unit and a receiving and recording service process unit, wherein,
the receiving and recording central control unit is used for monitoring the states of all the broadcasting processes, and comprises the steps of monitoring a plurality of NDI receiving and recording service processes on a plurality of servers and reflecting whether the processes die in real time;
the receiving and recording central control unit supports the arrangement of a receiving and recording schedule for each receiving and recording process;
the recording central control unit supports the replication of the schedule according to day, week and month;
the receiving and recording central control unit supports grouping of each receiving and recording channel to achieve group scheduling list synchronization;
the receiving and recording central control unit supports remote NDI preview of a received and recorded baseband signal;
the receiving and recording service process unit supports the input of NDI/SDI signals and detects the frame loss condition of the NDI signals in real time;
the receiving and recording service process unit supports NDI output of default support baseband signals, low-bit-rate real-time preview based on NDI is provided for central control software, and operation, maintenance and configuration are facilitated;
the recording service process unit supports file recording aiming at the NDI signal and supports a song-cutting function, namely if a user wants to edit immediately in the recording process, the user can click a song-cutting button, a video can be stored for one section immediately, and frames between the recorded video and the current video are continuous;
the recording service process unit supports the recording of SD, HD and 4K;
in the receiving and recording service process unit, a 4K signal supports the color gamut of H265 bt2020, and the recording support GPU realizes multi-path synchronous recording according to a single machine;
the receiving and recording service process unit supports signal receiving and recording according to the scheduled schedule;
the listing service process unit supports recording locally and synchronous migration.
Furthermore, the distribution module supports the input of the NDI/SDI signal and detects the frame loss condition of the NDI signal in real time;
the distribution module supports RTMP, SRT and DVB-UDP push streams;
the distribution module supports an RTMP and SRT streaming media server based on the Ali cloud on the Internet to realize signal distribution;
the distribution module supports butt joint of the RTMP and each large Internet live broadcast platform;
the distribution module supports a function of one-coding multi-transmission, namely, a coding process is used for simultaneously carrying out RTMP (real time Messaging protocol) stream pushing on a plurality of internet platforms, so that the performance requirement of equipment is greatly reduced;
the distribution module supports the conversion of DVB-UDP NDI signals into UDPSTPS signals of DVB standard, realizes the seamless connection of NDI signals and cable television signal standard, and realizes the synchronous broadcast of new media and traditional media;
the distribution module supports the function of a non-NDI signal gasket, and the STANDBY heartbeat detection and the main-STANDBY switching of the push flow.
Furthermore, in the post-production module, a plug-in is built in Adobe premix to realize the management of the recorded materials;
the online editing system refreshes the newly-entered recorded materials in real time;
the online editing system can submit and store, realize linkage with the recording server, realize the storage of the recording server, and refresh the material library automatically, realize the editing of the program;
completing the clipping of the online clipping system, submitting a packaging server based on Adobe Media Encode, and realizing the packaging and export in an interconnected grid mode;
and the online clipping system submits the content to a third-party packaging server to realize the content generation in a fixed mode by selecting mode synthesis.
Further, the security module includes a delayed play-out mode based on the NDI and a NDI stream maintenance one-out-of-many mode, wherein,
the NDI-based time-delay broadcasting mode supports the input and output of NDI signals, supports the self-definition of picture quality, supports the lossless storage, supports the real-time acquisition of frame loss data of video signals, supports the simultaneous viewing of an original picture and a delayed picture, and delays 1 hour to the maximum;
the NDI stream is monitored in real time to output the NDI signal in the one-out-of-multiple mode, and it is found that the NDI stream is sequentially switched backwards after receiving the frame loss for 2 seconds, for example, when the NDI stream is switched to the first channel, the NDI stream is automatically switched to the second channel after the frame loss for 2 seconds, and when the NDI stream is selected for one time, the NDI stream is sequentially switched backwards.
The technology based on NDI Router is adopted to support power-off direct connection, and a used link is not influenced under the condition that software is closed;
and the memory function is supported, and the reset automatically loads the setting of the last shutdown.
In the invention, the data delay is within 1 second based on the intranet platform of the NDI. After the scheduling and processing of the internal NDI network, the system supports real-time external pushing, and comprises the following steps: supporting SRT external real-time interaction; the RTMP internet fast stream pushing is supported, and multi-platform synchronous broadcasting of signals is realized; the DVB-UDP is supported to provide signals for traditional broadcasting platforms such as cable televisions in real time.
The video signal IP is a revolutionary change, and in the invention, baseband signals are no longer taken as mainstream in all studios, post production and virtual carousel, NDI (non-dispersive interference) signals with high image quality and low time delay are used for transmission, one NDI signal can be simultaneously used for a plurality of platforms, and the problem of complicated baseband signals and complicated wire jumpers in the prior art is solved.
For example, after NDI is used for broadcasting, some live broadcast signals do not need to be provided by a video matrix, and any NDI live broadcast signal in the network can be switched anytime and anywhere.
For example, the NDI matrix, the original matrix is set with a scale, such as 32 × 32 and 64 × 64, after the IP matrix is used, the definition is without limitation, switching is performed according to the scale of signals in the network, and a routing mode is used, if the matrix is closed, the path is well established, signals can be broadcast normally, and the switching of the main and standby signals is realized by assisting in monitoring multiple pictures with the signals.
In summary, the low-cost IP-based NDI signal transmission network based on the gigabit network can be deployed and implemented quickly, can implement arbitrary signal switching and scheduling, and can be elastically scaled according to the requirements.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. An all-IP audio/video system applied to a financial system is based on NDI and adopts an audio/video network transmission protocol of NDI, and is characterized by comprising a transmission module, an access module, a scheduling module, a monitoring module, a LIVE manufacturing module, a broadcasting module, a safety module, a recording module, a storage module, a post-manufacturing module and a distribution module, wherein,
the transmission module is used for realizing real-time return of the mobile signal and high-bandwidth signal return;
the access module is used for receiving and converging the internet signal flow and converting the received signal into an NDI signal;
the scheduling module adopts a matrix router based on NDI to realize switching scheduling of signals;
the monitoring module is used for monitoring the NDI signal and giving a signal alarm when frame loss is found;
the LIVE making module adopts an online making tool set to carry out on-site editing and making on the NDI signal;
the broadcasting module adopts an NDI master control broadcasting system to carry out real-time streaming broadcasting and simultaneously realizes the state monitoring of all broadcasting processes;
the safety module is used for ensuring the broadcasting safety;
the recording module adopts a centralized recording system based on NDI to realize file recording aiming at the NDI signal;
the storage module is used for storing the NDI signals recorded by the recording module;
the post-production module adopts an Adobe Premiere-based online editing system to realize online editing of the NDI signals recorded by the recording module;
the distribution module is used for realizing the conversion of the NDI signal and pushing the converted signal to a third-party platform in real time.
2. The all-IP audio-video system applied to financial systems according to claim 1, wherein the transmission module adopts a 5G-SRT multi-way converged video transmission backpack mode, a mobile phone SRT push streaming mode or an internet video platform mode, wherein,
the 5G-SRT multi-path aggregation video transmission backpack mode provides a multi-network fusion communication channel based on 5G and/or 4G links by utilizing a multi-link intelligent aggregation technology and an SRT video transmission technology, and transmits 4K and/or high-definition video signals with low delay and high image quality to an access module;
the mobile phone SRT flow pushing mode adopts the SRT flow pushing mode to realize the real-time transmission of signals to the access module;
the internet video platform mode adopts an RTMP protocol to transmit the internet video to the access module.
3. The all-IP audio-video system applied to financial systems according to claim 1, wherein the access module receives the converged internet signal stream, which includes an RTMP, HLS, SRT, DVB-UDP, webRTC or other internet signal stream;
the access module supports signal loss monitoring and safety gasket functions: the method supports the playing of the gasket when the network signal is lost, and the signal is automatically recovered when the network is recovered;
in the access module, SRT signal flow passes through the streaming media server to realize one-transmission and multi-reception, and a user does not need to have a public network address; meanwhile, the local deployment of the SRT streaming media server is provided, and the low-delay application based on the Internet is really realized.
4. The all-IP audio-video system applied to financial systems according to claim 1, wherein the functions supported by the matrix router based on NDI in a full routing manner include:
the CPU, the memory and the bandwidth of the service are not occupied in the switching process, and the power-off direct connection of the server is realized;
all NDI signals in the local area network are displayed, and grouping display can be performed according to the equipment to which the NDI signals belong;
setting names of the output NDI signals, and grouping the NDI signals to match different application targets;
switching single-path signals and switching groups, and realizing one-key emergency switching aiming at one group of signals;
monitoring each path of source signal and target signal through software;
and the main-standby binding and multi-picture linkage are realized to realize the main-standby switching of the NDI signal.
5. The all-IP audio/video system applied to the financial system according to claim 1, wherein the monitoring module can arbitrarily set a multi-picture type, can set an NDI signal, a name and picture quality of each picture, and can uniformly start and stop all the pictures or a single picture;
the monitoring module supports signal monitoring and gives a signal alarm when a video frame loss is found;
the LIVE production module supports an NDI switching table, NDI matting, CG editing and picture-in-picture packaging connection.
6. The all-IP audio-video system applied to the financial system according to claim 1, wherein the NDI master control broadcasting system comprises a list-editing central control unit and a broadcasting service process unit, wherein,
the order-editing central control unit is used for monitoring the states of all the broadcasting processes, and comprises the steps of monitoring a plurality of NDI broadcasting service processes on a plurality of servers and reflecting whether the processes die in real time;
the editing central control unit supports the playing editing of each playing process, selects audio and video files and NDI signals in various mainstream formats to edit, and automatically obtains the time length of the video files and the address of the NDI signals;
the editing central control unit supports the editing of three modes of sequential delay, timing inter cut and timing sequential delay;
the bill editing central control unit supports the copying of the bill editing according to the day, week and month;
the editing central control unit supports grouping of each broadcasting channel to realize grouping and editing synchronization;
the list-editing central control unit supports adding emergency statistics to each broadcast channel or a group of broadcast channels, a user designs the subtitle form of emergency notification, emergency characters are modified in a central control interface, and one-key up-down notification is carried out;
the broadcasting service process unit supports that the serial list on the current day can be read to broadcast the program by opening the click list reading unit;
the broadcasting service process unit supports NDI broadcasting with high-definition pictures or 4K pictures according to configuration software and a unified frame rate;
the broadcasting service process unit adopts a FULL NDI mode, wherein the transmission rate of the high-definition video signal is 100Mbps, and the transmission rate of the 4K signal is 300Mbps;
the broadcasting service process unit supports that the next video or NDI signal of the CUE can be automatically switched when the current program is broadcasted, and the next program can be automatically switched in a seamless frame precision manner when the broadcasting time point is reached;
the broadcasting service process unit supports automatic playing of the gasket picture when no video or NDI signal exists;
the playing service process unit supports that the last frame can be automatically played when the frame is lost, and the gasket is automatically switched when the count reaches 25 frames;
the broadcasting service process unit supports the superposition of station captions according to the setting;
the broadcasting service process unit supports the superposition of emergency broadcasting floating captions;
the broadcast service process unit supports synchronous output of the hardware IO card and the NDI signal.
7. The all-IP audio-video system applied to the financial system according to claim 1, wherein the recording module comprises a recording central control unit and a recording service process unit, wherein,
the receiving and recording central control unit is used for monitoring the states of all the broadcasting processes, and comprises the steps of monitoring a plurality of NDI receiving and recording service processes on a plurality of servers and reflecting whether the processes die in real time;
the receiving and recording central control unit supports the arrangement of a receiving and recording schedule for each receiving and recording process;
the recording central control unit supports the replication of the schedule according to day, week and month;
the receiving and recording central control unit supports grouping of each receiving and recording channel to achieve group scheduling list synchronization;
the receiving and recording central control unit supports remote NDI preview of a received and recorded baseband signal;
the receiving and recording service process unit supports the input of NDI/SDI signals and detects the frame loss condition of the NDI signals in real time;
the receiving and recording service process unit supports NDI output of default support baseband signals, low-bit-rate real-time preview based on NDI is provided for central control software, and operation, maintenance and configuration are facilitated;
the recording service process unit supports file recording aiming at NDI signals and supports a song cutting function, namely if a user wants to edit immediately in the recording process, a song cutting button can be clicked, a video can be stored for one section immediately, and frames between the recorded video and the current video are continuous;
the recording service process unit supports the recording of SD, HD and 4K;
in the receiving and recording service process unit, a 4K signal supports the color gamut of H265 bt2020, and the recording support GPU realizes multi-path synchronous recording according to a single machine;
the receiving and recording service process unit supports signal receiving and recording according to the scheduled schedule;
the listing service process unit supports recording locally and synchronous migration.
8. The all-IP audio-video system applied to the financial system according to claim 1, wherein the distribution module supports the input of NDI/SDI signals and detects the frame loss of the NDI signals in real time;
the distribution module supports RTMP, SRT and DVB-UDP push streams;
the distribution module supports an RTMP (real time Messaging protocol) and SRT (remote sequence transfer protocol) streaming media server based on the Aliskiren cloud on the Internet to realize the distribution of signals;
the distribution module supports butt joint of the RTMP and each large Internet live broadcast platform;
the distribution module supports a function of one-editing and multi-sending;
the distribution module supports the conversion of DVB-UDP NDI signals into UDPSTPS signals of DVB standard, realizes the seamless connection of NDI signals and cable television signal standard, and realizes the synchronous broadcast of new media and traditional media;
the distribution module supports the function of a non-NDI signal gasket, and the STANDBY heartbeat detection and the main-STANDBY switching of the push flow.
9. The all-IP audio/video system applied to a financial system according to claim 1, wherein in the post-production module, a plug-in is built in Adobe Premiere to realize management of the received and recorded materials;
the online editing system refreshes the newly-entered recorded materials in real time;
the online editing system can submit and store, realize linkage with the recording server, realize the storage of the recording server, and refresh the material library automatically, realize the editing of the program;
completing the clipping of the online clipping system, submitting a packaging server based on Adobe Media Encode, and realizing the packaging and export in an interconnected grid mode;
and the online clipping system submits the content to a third-party packaging server to realize the content generation in a fixed mode by selecting mode synthesis.
10. The all-IP audio-video system applied to the financial system according to claim 1, wherein the security module comprises a delayed play-out mode based on NDI and a stream maintenance one-out-of-many mode based on NDI, wherein,
the NDI-based time-delay broadcasting mode supports the input and output of NDI signals, supports the self-definition of picture quality, supports the lossless storage, supports the real-time acquisition of frame loss data of video signals, and supports the simultaneous viewing of an original picture and a delayed picture with the maximum time delay of 1 hour;
in the NDI flow maintaining one-out-of-multiple mode, NDI signals are monitored and output in real time, and are sequentially switched backwards after frame loss is found and received for 2 seconds; the technology based on NDI Router is adopted to support power-off direct connection, and a used link is not influenced under the condition that software is closed; and the memory function is supported, and the reset automatically loads the setting of the last shutdown.
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