CN113507574A - System for processing and playing ultrahigh-definition video - Google Patents
System for processing and playing ultrahigh-definition video Download PDFInfo
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- CN113507574A CN113507574A CN202110658967.9A CN202110658967A CN113507574A CN 113507574 A CN113507574 A CN 113507574A CN 202110658967 A CN202110658967 A CN 202110658967A CN 113507574 A CN113507574 A CN 113507574A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
Abstract
The embodiment of the application provides a system for processing production and broadcasting of ultra-high definition video, which comprises: the front-end acquisition system is used for acquiring the ultrahigh-definition video signal and encoding the ultrahigh-definition video signal to obtain a video code stream; the network transmission system is used for transmitting the video code stream to a cloud production and broadcasting system deployed at the cloud end; a cloud production and broadcasting system; fixing a production and sowing system; and moving the production and broadcasting system. Compared with the prior art, the system can safely, high-quality and low-cost replace the application of the traditional broadcast television production and broadcasting systems such as satellite transmission, cable transmission and the like, is not limited by time and place when in use, can complete production and broadcasting anytime and anywhere, greatly improves the flexibility of the system, can realize multi-place and multi-person collaborative production and broadcasting, improves the efficiency of the whole production and broadcasting system, and has low cost and low time delay.
Description
Technical Field
The application relates to the technical field of broadcast television, in particular to a system and a method for processing ultra-high definition video.
Background
In the existing broadcast television production and broadcasting technology, a fixed machine position is generally adopted to realize video signal acquisition or a camera is adopted to record videos and then produce the videos, and the production and broadcasting technology is limited by conditions such as time, place and the like to a great extent; then, video signals are converged to a satellite relay truck for signal switching and manufacturing based on satellite link transmission, PGM signals which are manufactured are coded and compressed through a vehicle-mounted encoder and are converted into IP signals, signal uploading is carried out through a vehicle-mounted satellite modulator, after the satellite transponder forwards, a ground receiving antenna receives wireless signals, special satellite receiving equipment carries out signal demodulation and decoding to achieve receiving of program signals, and then manufacturing or application and release are carried out through a distribution system.
The whole satellite relay vehicle comprises systems for acquisition, encoding, transmission, manufacturing, power supply and the like, wherein the transmission system comprises a satellite forwarding system, a ground receiving system, a signal conversion system and the like, the whole system is large and poor in flexibility, and the whole satellite link transmission cost is high and the time delay is high.
Disclosure of Invention
The embodiment of the application provides a system for processing and broadcasting ultra-high definition videos, and aims to solve the problems of large system and poor flexibility in a broadcast television system and broadcasting system based on satellite link transmission.
An embodiment of the present application provides a system for processing production and broadcasting of ultra high definition video, including: the front-end acquisition system is used for acquiring the ultrahigh-definition video signal and encoding the ultrahigh-definition video signal to obtain a video code stream; the network transmission system is used for transmitting the video code stream to a cloud production and broadcasting system deployed at the cloud end; the cloud production and broadcasting system is used for receiving the video code stream and carrying out video guide broadcasting, video production and/or video distribution on the basis of the content of the video code stream; the fixed production and broadcasting system is deployed in a television station and is used for receiving video code streams from the front-end acquisition system, the cloud production and broadcasting system and the mobile production and broadcasting system and carrying out video scheduling, video production and/or video distribution based on the content of the video code streams; and the mobile production and broadcasting system is used for receiving the video code streams from the front-end acquisition system, the cloud production and broadcasting system and the fixed production and broadcasting system, and performing video guide broadcasting, video production and/or video distribution based on the content of the video code streams.
In the technical scheme, the transmission, the production and the multi-channel release of the broadcast television production and broadcast technology are realized by utilizing the network transmission system and the cloud production and broadcast system deployed at the cloud end, the produced program finished products can be directly distributed to each new media platform at the cloud end, and the application of the broadcast television production and broadcast system such as traditional satellite transmission, cable transmission and the like can be safely, high-quality and low-cost replaced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic diagram showing a system for processing production and broadcasting of ultra high definition video in an embodiment of the present application;
fig. 2 shows another schematic diagram of a system for processing ultra high definition video production in the embodiment of the present application.
Detailed Description
The following detailed description of exemplary embodiments of the present application, taken in conjunction with the accompanying drawings, makes it apparent that the described embodiments are only some embodiments of the application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
An embodiment of the present application provides a system for processing a super high definition video, please refer to fig. 1, where the system for processing a super high definition video includes: the system comprises a front-end acquisition system, a network transmission system and a cloud production and broadcasting system. The front-end acquisition system is used for acquiring an ultra-high-definition video signal and encoding the ultra-high-definition video signal to obtain a video code stream; the network transmission system is used for transmitting the video code stream output by the front-end acquisition system to a cloud production and broadcasting system deployed at the cloud end; the cloud production and broadcast system is used for receiving the video code stream transmitted by the network transmission system and carrying out video guide, video production and/or video distribution based on the content of the video code stream; the system comprises a fixed production and broadcasting system deployed in a television station and used for receiving video code streams from a front-end acquisition system and a cloud production and broadcasting system and carrying out video scheduling, video production and/or video distribution based on the content of the video code streams; the number of the fixed production and broadcast systems can be multiple; the mobile production and broadcasting system is used for receiving video code streams from the front-end acquisition system, the cloud production and broadcasting system and the fixed production and broadcasting system, and conducting video guide broadcasting, video production and/or video distribution based on the content of the video code streams; the number of mobile casting systems may be plural.
In a specific embodiment, the front-end acquisition system comprises an ultra-high-definition camera and a portable coding backpack, the ultra-high-definition camera is used for completing ultra-high-definition video signal acquisition and outputting baseband signals through an output interface, and the output interface adopts a 4 × 3G-SDI interface or a 12G-SDI/HDMI interface. The portable coding backpack is a 5G +4K/8K backpack, receives ultra-high-definition video signals acquired by the ultra-high-definition video camera through a 4 × 3G-SDI interface or a 12G-SDI/HDMI interface, codes the ultra-high-definition video signals by using an HEVC coding protocol, and compresses the ultra-high-definition video signals into digital signals meeting transmission standards, namely video code streams. And connecting an outdoor macro station (or an indoor distributed small station) through a network transmission system to perform outward transmission.
In another embodiment, the acquisition and encoding of the ultra-high-definition video signal can be completed by the mobile phone, specifically, the mobile phone APP is used for calling a mobile phone camera to acquire the video, the acquired video signal is encoded by means of the encoding capability of the mobile phone, and the encoded video code stream is uploaded to the cloud production and broadcast system by means of the network communication capability of the mobile phone. Therefore, front-end acquisition, coding and transmission of the ultra-high-definition video signal are completed through the mobile phone APP.
In this embodiment, a conventional production and broadcasting system is deployed in a cloud manner to form a cloud production and broadcasting system, and the cloud production and broadcasting system can realize functions of protocol conversion, scheduling, production, transcoding, storage, multi-channel distribution and the like of video signals, so that the requirement that production and broadcasting can be completed only under the support of traditional professional hardware equipment is broken, and the production and broadcasting can be completed anytime and anywhere without the limitation of time and place when the system is used, so that the flexibility of the system is greatly improved, the collaborative production and broadcasting of multiple places and multiple people can be realized, and the efficiency of the whole production and broadcasting system is improved.
The mobile casting system may be deployed on a mobile vehicle, including but not limited to a relay truck, a train, a small SUV, and the like.
In the system shown in fig. 1, the network transmission system may connect the front-end acquisition system, the cloud production and broadcasting system, the fixed production and broadcasting system, and the mobile production and broadcasting system through a 5G communication wireless network, a wired internet, an internet dedicated line, and the like, so as to implement the intercommunication of service data and management data in the whole production and broadcasting processing system, especially the intercommunication of video code streams.
In an embodiment, referring to fig. 2, the cloud production and broadcasting system includes a cloud receiving subsystem, a cloud director subsystem, a cloud production subsystem, and a cloud storage subsystem. Any video material cross-region distribution of any subsystem can be realized through a cloud production and broadcasting system, for example: the video material of the cloud receiving subsystem is provided for other subsystems at the cloud end, and also provided for a plurality of fixed studio systems and a plurality of mobile studio systems through a network transmission system, and video distribution is not limited by regions, areas and the like as long as network conditions are met.
The cloud receiving subsystem is used for receiving video code streams from the front-end acquisition system, the fixed production and broadcasting system and the mobile production and broadcasting system, carrying out protocol conversion processing on the obtained video code streams, and transmitting the processed video code streams to one or more subsystems in the cloud production and broadcasting system. After receiving the 4K and 8K ultrahigh-definition video code streams, the cloud receiving subsystem carries out protocol conversion to convert RTC, SRT, RIST, RTMP, RIST, UDP, private aggregation protocol and the like into UDP, RTMP, NDI or RTC and other protocols. The RTC protocol has the characteristic of ultra-low delay, but the picture quality is poor, and the RTC protocol is generally used in video connection conversation programs; the SRT protocol has the characteristics of low delay and high reliability, and is relatively suitable for signal transmission under the condition of a public network; the RIST protocol has the characteristics of low delay, high reliability and multilink transmission, has higher reliability compared with the SRT, but needs multilink guarantee; the private aggregation protocol is generally an optimized protocol based on SRT and RIST, and the matching optimization of the transmission efficiency and the network condition is carried out through an intelligent algorithm, so that the transmission effect is better; the RTMP protocol has longer time delay and high reliability and is suitable for the live broadcast transmission of new media video with low time delay requirement; the UDP protocol has the characteristics of low latency and low reliability, needs to be transmitted under a good network condition, and is generally suitable for local area network transmission, such as direct transmission among subsystems in a cloud broadcast system; the NDI protocol is an intranet transmission protocol with high code rate and is widely applied to transmission in the field of new media manufacturing.
The cloud receiving subsystem can perform protocol conversion according to deployment conditions of subsystems in the cloud production and broadcasting system and use scenes of video code streams, for example, if all the subsystems in the cloud production and broadcasting system are in the same cloud end and network conditions are guaranteed, a UDP (user Datagram protocol) protocol can be adopted to enable the video code streams to be transmitted in the same cloud end, if the cloud ends deployed by the subsystems are different and the video code stream transmission among the subsystems needs to pass through a public network, a transmission protocol suitable for the public network conditions can be selected, and the transmission capability of the code streams is guaranteed. And after the protocol conversion processing is finished, transmitting the processed video code stream to one or more of a cloud director subsystem, a cloud making subsystem and a cloud storage subsystem. The output of the cloud receiving subsystem also supports parallel transmission to the fixed studio system and the mobile studio system via the network transmission system.
The cloud broadcasting-directing subsystem is used for acquiring video code streams from the cloud receiving subsystem, performing video and audio preview and pre-monitoring on at least one acquired video code stream through the cloud broadcasting-directing subsystem, outputting PGM signals, and performing video packaging on the PGM signals through the cloud broadcasting-directing platform.
Specifically, the cloud receiving subsystem can transmit a plurality of paths of video code stream signals to the cloud director subsystem at the same time; the cloud broadcasting subsystem carries out cloud broadcasting frame synchronous switching on a plurality of video code streams, carries out video and audio preview through a cloud broadcasting end, selects one path of code stream signal for pre-monitoring and outputs a PGM (broadcasting monitoring) signal; video packaging of PGM signals by a cloud director platform, comprising: the method comprises the following steps of adding station captions (static icons and dynamic icons) and subtitles, setting a switching special effect and audio output attributes, wherein the switching special effect supports the effects of fade-in fade-out, fly-in from top, fly-in from bottom and the like, and the audio output supports multi-channel mixed sound to be output along with PGM and single-channel audio to be output along with PGM. The cloud director subsystem outputs the obtained video result and can output the video result to the cloud storage subsystem and the cloud manufacturing subsystem. The output of the cloud director subsystem also supports parallel transmission to the fixed studio system and the mobile studio system via the network transmission system.
The cloud making subsystem is used for acquiring video code streams from the cloud receiving subsystem and the cloud director subsystem and editing videos according to the acquired video code streams. Specifically, the cloud production subsystem receives a video code stream of the cloud director subsystem or the cloud receiving subsystem, and the video code stream is used as a video material, and is subjected to single editing or mixed editing, high-bit-rate rendering, AI image effect enhancement, virtual scene editing and the like with other video materials (a cloud video material or video materials from a front-end acquisition system, a fixed production and broadcasting system and a mobile production and broadcasting system). The new media platform includes, but is not limited to, a "mainstream video" or "vacation video" media video platform.
And after finishing video editing, transcoding the video format, resolution, code rate, color gamut and transmission protocol of the finished program product to obtain each video file to be pushed according to the transcoding requirement of each new media platform by taking the obtained video result as a finished program product, and then pushing each video file to be pushed to the corresponding new media platform. The cloud production subsystem stores all video results in the cloud storage subsystem in a unified manner, and also supports parallel transmission to the fixed production and broadcasting system and the mobile production and broadcasting system through the network transmission system, so that broadcast television broadcasting can be directly carried out subsequently according to program requirements, or broadcasting is carried out after secondary production, wherein the secondary production comprises: and changing station captions, subtitles, partial materials and other materials, and performing merging and manufacturing, code rate conversion, resolution conversion and the like.
And the cloud storage subsystem is used for storing the video results obtained by the cloud receiving subsystem, the cloud director subsystem and the cloud making subsystem as video materials. During storage, two storage modes of active code recording and code recording are adopted, for the source code recording, video and audio codes in an IP code stream are not changed, and the file landing is realized according to a suitable packaging mode matched with the codes; and for the encoding and recording, transcoding the video and audio information in the IP code stream into an NDI format to uniformly manufacture the format. The cloud storage subsystem can realize intelligent strip removal of the video material, and strip removal, recording and storage can be carried out according to program content, program time, keywords and the like; the recording service of the video material can realize the quasi-real-time review and editing, namely, for the recorded video and audio files, the video and audio files can be accessed when the sealing is not finished, and the time delay does not exceed 10 s; the method realizes the simultaneous recording and emigration of multiple code rates of the video material, different code rates can be set according to different target formats, a foundation is provided for multi-code-rate editing in the mobile manufacturing process, and at the same time, the recording is not lower than three code rates.
Furthermore, the fixed production and broadcasting system mainly utilizes the production and broadcasting system built in the existing television station to complete the functions of protocol conversion, scheduling, transcoding, production, storage, multi-channel distribution and the like of the video signal, and comprises the following steps: the system comprises a fixed receiving subsystem, a fixed total control subsystem, a fixed manufacturing subsystem, a fixed monitoring subsystem and a fixed broadcasting subsystem.
The fixed receiving subsystem is used for receiving video code streams from the front-end acquisition system, the cloud production and broadcasting system and the mobile production and broadcasting system, carrying out protocol conversion processing on the obtained video code streams, and transmitting the processed video code streams to one or more subsystems in the fixed production and broadcasting system. The fixed receiving subsystem completes the receiving and protocol conversion of the video code stream, and realizes the conversion of RTC, SRT, RIST, RTMP, RIST, UDP, private aggregation protocol and the like into UDP, RTMP or NDI and other protocols. The fixed receiving subsystem can provide video materials for other subsystems of the fixed recording and broadcasting system, and the output of the fixed receiving subsystem also supports the parallel provision for the cloud recording and broadcasting system and the mobile recording and broadcasting system through the network transmission system.
Meanwhile, the fixed receiving subsystem is provided with a video decoding function for decoding the ultrahigh-definition video code stream into a baseband signal, and transmitting the baseband signal to the fixed master control subsystem, and the fixed master control subsystem dispatches the baseband signal to other subsystems for use.
The fixed master control subsystem is used for acquiring the video code stream from the fixed receiving subsystem, and scheduling the acquired video code stream to a corresponding studio or scheduling the video code stream to the fixed manufacturing subsystem. For example, when the real-time video code stream of the external field reaches the fixed general control subsystem, the fixed general control subsystem schedules the real-time video code stream to a corresponding studio, combines an indoor picture and an external field video picture of the studio, and performs production processing including adding subtitles and special effects, packaging and rendering the real-time video code stream, and the like, so as to obtain a presentation program.
The fixed master control subsystem is divided into IP signal scheduling and baseband signal scheduling. The IP signal scheduling is mainly applied to scheduling processing of new media services, while the scheduling processing of traditional media is generally realized by baseband signal scheduling, and scheduled signals enter other subsystems of a fixed recording and broadcasting system and are also supported to be provided to a cloud recording and broadcasting system and a mobile recording and broadcasting system as video materials through a network transmission system.
The fixed master control subsystem has the capabilities of signal backup, signal detection and automatic switching so as to provide signal safety guarantee. Generally, video transmission is divided into main path signal transmission and standby path signal transmission, the main path signal is generally transmitted through a 5G communication network, the standby path signal is generally transmitted through a dedicated line or a wired network, and the main path signal and the standby path signal reach the fixed general control subsystem at the same time. The fixed master control subsystem monitors the signal quality of the scheduled video code stream, and when the scheduled video code stream is detected to have abnormity, if packet loss or cut-off exists, the fixed master control subsystem switches to the standby video code stream of the video code stream for scheduling output, so that the output of the fixed master control subsystem is continuous and complete.
And the fixed manufacturing subsystem is used for acquiring the video code streams from the fixed receiving subsystem and the fixed master control subsystem and editing videos according to the acquired video code streams. Specifically, the fixed production subsystem is used for acquiring video code streams from the fixed receiving subsystem and the fixed master control subsystem, taking the video code streams as video materials, and performing single editing or mixed editing, high-code-rate rendering, AI image effect enhancement, virtual scene editing and other processing on the video materials and local video materials, so that the production of videos and graphic manuscripts is facilitated, and the obtained video results can be used as the video materials, stored in the media system, or transmitted to the cloud production and broadcast system and the mobile production and broadcast system in parallel through the network transmission system, or used as program finished products and pushed to a new media platform in a video file or new media manuscripts mode.
And after finishing video editing, transcoding the video format, resolution, code rate, color gamut and transmission protocol of the finished program product to obtain each video file to be pushed according to the transcoding requirement of each new media platform by taking the obtained video result as a finished program product, and then pushing each video file to be pushed to the corresponding new media platform.
The fixed monitoring subsystem is used for monitoring video results obtained by each subsystem in the fixed recording and broadcasting system. Specifically, the content monitored by the fixed monitoring subsystem includes: the method comprises the steps of three-level error detection information of the complete TR 101290 standard, preview and statistics of bandwidth, PSI/SI table analysis, PSI table interval analysis, flow cutoff detection, ES analysis and the like. ES analysis includes audio-video ES analysis in a variety of formats, with video formats supporting MPEG-1, MPEG-2, H.264, H.265, AVS +, AVS2, etc., and audio formats supporting MPEG-1, MPEG-2, dolby audio, enhanced dolby audio, PCM, DRA, AAC, etc.
The fixed monitoring subsystem utilizes the decoding system to carry out screen-combining output on a plurality of paths of video code streams, image presentation is carried out on a monitoring wall, all-weather real-time objective analysis on the code streams is realized, fault equipment is intelligently and efficiently positioned, and the problem is solved by quick response.
The fixed broadcasting subsystem is used for acquiring a program to be broadcasted, the program to be broadcasted is transmitted in a baseband signal form, contents such as yellow-related content, storm-related content and the like in the program to be broadcasted are examined by an automatic examination mechanism, after the examination is passed, the program to be broadcasted is coded in an AVS2 or AVS3 coding mode, wherein 4K ultrahigh-definition videos are coded by AVS2, 8K ultrahigh-definition videos are coded by AVS3, and the coded program to be broadcasted is broadcasted on a large screen of a traditional broadcast television through a satellite.
Further, the mobile recording and broadcasting system can realize the mobile recording and broadcasting production work of the program under the moving state of the vehicle, and mainly comprises: functions of transmitting, receiving, transcoding, switching, packaging, storing, clipping, distributing, and the like. The mobile production and broadcasting system utilizes a multi-path network aggregation technology to realize flexible ultra-large bandwidth transmission, realizes an end-to-end full IP architecture, and meets the multi-path high-definition or 4K ultra-high-definition video processing capacity in a vehicle. The mobile production and broadcasting system is connected with the cloud production and broadcasting system to reduce vehicle-mounted equipment, the cloud end has infinite expansion performance, and uplink and downlink wired transmission braids can be cut off to realize wireless networking. The mobile production and broadcasting system supports the intercommunication and interconnection of vehicle-mounted edge basic computing power, cloud media resources and a main station media resource system, and is manufactured in a coordinated mode. Specifically, the mobile production and broadcast system comprises a mobile receiving subsystem, a mobile scheduling subsystem, a mobile production subsystem and a mobile monitoring subsystem.
The mobile receiving subsystem is used for acquiring video code streams from the front-end acquisition system, the cloud production and broadcasting system and the fixed production and broadcasting system through the gateway equipment, carrying out protocol conversion processing on the acquired video code streams, and transmitting the processed video code streams to one or more subsystems in the mobile production and broadcasting system. The core equipment of the mobile receiving subsystem is a multi-path network aggregation gateway, and multi-path 5G/4G wireless signals, WIFI signals and wired signals can be converged under a weak network environment, so that network bandwidth resources are improved. The mobile receiving subsystem realizes the protocol conversion of the video code stream output by the cloud system or the fixed system and broadcast system or the locally acquired video code stream by using the streaming media protocol gateway equipment, and supports the conversion of RTC, SRT, RIST, RTMP, RIST, UDP, private aggregation protocol and the like into UDP, RTMP or NDI and other protocols.
The mobile scheduling subsystem is used for distributing the video code stream from the mobile receiving subsystem to the program director, the mobile manufacturing subsystem and the mobile monitoring subsystem through the IP switching matrix; and previewing and pre-monitoring the video and audio of the distributed video code stream through the broadcasting guide station, outputting a PGM signal, and performing video packaging on the PGM signal.
The IP switching matrix has the main functions of receiving IPV4 and IPV6 unicast and multicast code streams from the mobile receiving subsystem and forwarding the code streams input by any port to multiple ports for output, wherein the multiple ports output the code streams, and comprise a broadcast guide station, a mobile manufacturing subsystem, a mobile monitoring subsystem and the like. And the IP switching matrix also realizes backup, manual or automatic switching of the code stream, and when the main video code stream is abnormal, the main video code stream is switched to the backup video code stream for output, thereby ensuring the high reliability of the code stream transmission service. The main function of the broadcast guide station is to input the video and audio preview of the code stream, select a path of code stream signal for pre-monitoring and output a PGM (broadcast monitoring) signal; video-packing a PGM signal comprising: the method comprises the following steps of adding station captions (static icons and dynamic icons) and subtitles, setting a switching special effect and audio output attributes, wherein the switching special effect supports the effects of fade-in fade-out, fly-in from top, fly-in from bottom and the like, and the audio output supports multi-channel mixed sound to be output along with PGM and single-channel audio to be output along with PGM. The broadcasting station comprises an IP broadcasting station and an SDI broadcasting station, the IP broadcasting station inputs IP signals, the SDI broadcasting station inputs baseband signals, the IP signals are mainly used for new media, the SDI signals are mainly used for traditional media, and the functions of the IP broadcasting station and the SDI broadcasting station are basically consistent.
The video result of the mobile scheduling subsystem can be output to the mobile manufacturing subsystem and the mobile monitoring subsystem, and certainly, the video result can also be provided for the fixed production and broadcast system and the cloud production and broadcast system through the network transmission system.
The mobile production subsystem is used for obtaining video code streams from the mobile receiving subsystem and the mobile scheduling subsystem, carrying out video editing according to the obtained video code streams, taking an edited video result as a finished program product, transcoding the video format, resolution, code rate, color gamut and transmission protocol of the finished program product according to the transcoding requirement of each new media platform to obtain each video file to be pushed, and pushing each video file to be pushed to the corresponding new media platform. Specifically, the mobile production subsystem receives the video code stream of the mobile receiving subsystem or the mobile scheduling subsystem, takes the video code stream as a video material, and carries out single editing or mixed editing, high-bit-rate rendering, AI image effect enhancement, virtual scene editing and other processing on the video material and other video materials (local video materials or video materials from a front-end acquisition system, a fixed production and broadcasting system and a cloud production and broadcasting system), thereby facilitating the cross-region production of videos and image-text drafts, and the obtained video result can be taken as a video material and stored in a media resource system or used as a program finished product and pushed to a new media platform in a video file or new media draft mode. The video result of the mobile production subsystem can also be transmitted to the cloud production and broadcasting system and the fixed production and broadcasting system in parallel through the network transmission system.
The mobile monitoring subsystem is used for monitoring the quality indexes of the video code streams output by each subsystem in the mobile production and broadcasting system, previewing and monitoring the video results of each subsystem and providing alarm and response processing measures in time. The monitored contents comprise: the method comprises the steps of three-level error detection information of the complete TR 101290 standard, preview and statistics of bandwidth, PSI/SI table analysis, PSI table interval analysis, flow cutoff detection, ES analysis and the like. ES analysis includes audio-video ES analysis in a variety of formats, with video formats supporting MPEG-1, MPEG-2, H.264, H.265, AVS +, AVS2, etc., and audio formats supporting MPEG-1, MPEG-2, dolby audio, enhanced dolby audio, PCM, DRA, AAC, etc.
In fig. 2, the content is finally presented on the terminal APP of the new media platform through the programs generated by the cloud production and broadcast system, the mobile production and broadcast system, and the fixed production and broadcast system.
To sum up, the system for processing and playing ultra-high definition video provided by the application has the following advantages:
1. in the prior art, due to the position limitation of a signal acquisition machine and a satellite rebroadcasting vehicle, the mobile acquisition of video signals cannot be realized, the scheme adopts a portable ultrahigh-definition camera, a 5G +4K/8K portable coding backpack (or a mobile phone + APP) and the like, can carry out the acquisition and coding of high-definition and ultrahigh-definition video signals at any time and any place in a good coverage area of 5G communication signals and carry out real-time transmission, and well solves the problems that the rebroadcasting vehicle and the camera are fixed and cannot carry out mobile acquisition;
2. in the prior art, the whole satellite relay broadcasting vehicle comprises systems for acquisition, encoding, transmission, manufacturing, power supply and the like, and a transmission system comprises a satellite forwarding system, a ground receiving system, a signal conversion system and the like, so that the whole system is large and poor in flexibility; and this scheme collection end only needs portable super high definition camera, portable code knapsack (perhaps cell-phone + APP) of 5G +4K 8K, and single collection that just can accomplish the signal is uploaded, and whole portability is high, and transmission system adopts present commercial 5G communication network, and the receiving terminal only need receive through receiving system, can get into present broadcasting, preparation, release system. Therefore, the scheme can solve the problem of poor flexibility of the existing satellite broadcast television transmission system;
3. in the prior art, the overall cost of satellite link transmission is high, and the scheme based on 5G communication link transmission provided by the scheme has the advantages that the cost of the portable ultra-high-definition camera and the 5G +4K/8K portable coding backpack, the 5G flow cost and the cloud forwarding cost are relatively low, the overall cost is reduced by multiple times compared with the satellite transmission scheme, and the cost is greatly reduced;
4. in the prior art, the whole delay of a satellite broadcast television transmission system is larger, the delay of a satellite link of the satellite broadcast television transmission system is larger than 270ms, and the delay of transmission of a 5G communication link adopted by the scheme is smaller than 20 ms;
5. the scheme can realize the outfield transmission of 4K/8K ultra-high-definition live broadcast signals, realize the wireless downlink of a 5G outfield through a cloud system, and realize the wireless downlink of multi-path, stable and reliable ultra-high-definition videos by adopting a multi-path aggregation gateway;
6. the video service of the traditional production and broadcasting processing system is developed only point to point, and trans-regional and multi-point transmission cannot be realized; the 5G network and cloud system based wide service distribution can be realized, and the method is not limited by factors such as regions, time and the like;
7. to traditional shooting of television program, the collection transmission of material, the cost of setting up transmission channel is higher and consuming time longer, generally need take day, week as unit calculation, to the timeliness, the proruption of whole media propagation in the face of new era, original traditional transmission mode is more and more difficult to satisfy transmission and system broadcast demand, this scheme utilizes 5G network's high bandwidth, low time delay characteristic, combines 4K, the ultralow time delay transmission basis of 8K codec, promotes transmission efficiency guarantee material quality greatly.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A system for processing production and broadcasting of ultra high definition video, comprising:
the front-end acquisition system is used for acquiring the ultrahigh-definition video signal and encoding the ultrahigh-definition video signal to obtain a video code stream;
the network transmission system is used for transmitting the video code stream to a cloud production and broadcasting system deployed at the cloud end;
the cloud production and broadcasting system is used for receiving the video code stream and carrying out video guide broadcasting, video production and/or video distribution on the basis of the content of the video code stream;
the fixed production and broadcasting system is deployed in a television station and is used for receiving video code streams from the front-end acquisition system, the cloud production and broadcasting system and the mobile production and broadcasting system and carrying out video scheduling, video production and/or video distribution based on the content of the video code streams;
and the mobile production and broadcasting system is used for receiving the video code streams from the front-end acquisition system, the cloud production and broadcasting system and the fixed production and broadcasting system, and performing video guide broadcasting, video production and/or video distribution based on the content of the video code streams.
2. The system of claim 1, wherein the front-end acquisition system comprises:
the ultrahigh-definition camera is used for acquiring ultrahigh-definition video signals;
and the portable encoding backpack is used for encoding the ultrahigh-definition video signal to obtain a video code stream.
3. The system of claim 1, wherein the cloud production and broadcast system, the fixed production and broadcast system and the mobile production and broadcast system are communicated with each other via a network transmission system.
4. The system of claim 3, wherein the network transmission system employs a 5G communication network for video stream transmission.
5. The system of claim 1, wherein the cloud casting system comprises:
the cloud receiving subsystem is used for receiving video code streams from the front-end acquisition system, the fixed production and broadcasting system and the mobile production and broadcasting system, carrying out protocol conversion processing on the obtained video code streams and transmitting the processed video code streams to one or more subsystems in the cloud production and broadcasting system;
the cloud broadcasting subsystem is used for acquiring video code streams from the cloud receiving subsystem, previewing and pre-monitoring at least one acquired video code stream through the cloud broadcasting subsystem, outputting PGM signals and performing video packaging on the PGM signals through the cloud broadcasting platform;
the cloud making subsystem is used for acquiring video code streams from the cloud receiving subsystem and the cloud director subsystem and editing videos according to the acquired video code streams;
and the cloud storage subsystem is used for storing the video results obtained by the cloud receiving subsystem, the cloud director subsystem and the cloud making subsystem as video materials.
6. The system of claim 5, wherein the cloud production subsystem is configured to:
after video editing is carried out according to the obtained video code stream, the obtained video result is used as a program finished product;
transcoding the video format, resolution, code rate, color gamut and transmission protocol of the finished program product according to the transcoding requirement of each new media platform to obtain each video file to be pushed;
and pushing each video file to be pushed to the corresponding new media platform.
7. The system of claim 1, wherein the fixed production system comprises:
the fixed receiving subsystem is used for receiving video code streams from the front-end acquisition system, the cloud production and broadcasting system and the mobile production and broadcasting system, carrying out protocol conversion processing on the obtained video code streams, and transmitting the processed video code streams to one or more subsystems in the fixed production and broadcasting system;
the fixed master control subsystem is used for acquiring a video code stream from the fixed receiving subsystem, and dispatching the video code stream to a corresponding studio or dispatching the video code stream to the fixed manufacturing subsystem;
the fixed manufacturing subsystem is used for acquiring video code streams from the fixed receiving subsystem and the fixed master control subsystem and editing videos according to the acquired video code streams;
and the fixed monitoring subsystem is used for monitoring the video results obtained by each subsystem in the fixed recording and broadcasting system.
8. The system of claim 7, wherein the fixed production system further comprises:
and the fixed broadcasting subsystem is used for acquiring the programs to be broadcasted transmitted in the form of baseband signals, examining the contents of the programs to be broadcasted, encoding the programs to be broadcasted by adopting an AVS2 or AVS3 encoding mode after the examination is passed, and broadcasting the encoded programs to be broadcasted through a satellite.
9. The system of claim 7, wherein the fixed general control subsystem is configured to:
and monitoring the signal quality of the scheduled video code stream, and switching to the standby video code stream for scheduling output when the scheduled video code stream is detected to be abnormal.
10. The system of claim 1, wherein the mobile casting system comprises:
the mobile receiving subsystem is used for acquiring video code streams from the front-end acquisition system, the cloud production and broadcasting system and the fixed production and broadcasting system through gateway equipment, performing protocol conversion processing on the acquired video code streams, and transmitting the processed video code streams to one or more subsystems in the mobile production and broadcasting system;
the mobile scheduling subsystem is used for distributing the video code stream from the mobile receiving subsystem to the program director, the mobile manufacturing subsystem and the mobile monitoring subsystem through the IP switching matrix; previewing and pre-monitoring the distributed video code stream through a broadcasting guide station, outputting a PGM signal, and performing video packaging on the PGM signal;
the mobile manufacturing subsystem is used for acquiring video code streams from the mobile receiving subsystem and the mobile scheduling subsystem, performing video editing according to the acquired video code streams, transcoding the video format, resolution, code rate, color gamut and transmission protocol of the finished program product according to the transcoding requirement of each new media platform to obtain each video file to be pushed, and pushing each video file to be pushed to the corresponding new media platform;
and the mobile monitoring subsystem is used for monitoring the quality indexes of the video code streams output by each subsystem in the mobile production and broadcasting system and previewing and monitoring the video results of each subsystem.
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