CN112333535A - Emergency broadcast padding scene switching method and system - Google Patents
Emergency broadcast padding scene switching method and system Download PDFInfo
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
- H04N21/4394—Processing of audio elementary streams involving operations for analysing the audio stream, e.g. detecting features or characteristics in audio streams
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44012—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving rendering scenes according to scene graphs, e.g. 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/488—Data services, e.g. news ticker
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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
- H04N5/278—Subtitling
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Abstract
The invention relates to the technical field of emergency broadcasting, in particular to a method and a system for switching a broadcast-padded scene of emergency broadcasting. The system is applied to an emergency broadcast padding scene switching system and comprises an emergency decoding module; the method comprises the following steps: monitoring and receiving emergency data sent by a superior platform; analyzing the emergency data according to an emergency protocol to obtain emergency information required by the multicast; decoding the emergency information through an emergency decoding module to obtain an emergency information level and emergency audio and video data; and according to the emergency information level, realizing the combined coding of the emergency audio and video data and the current output audio and video data, and realizing the broadcast output of the emergency broadcast on the terminal. The method is simple to use, the padded broadcast program does not need to be formulated in advance, the audio and video data processing can be realized through analysis, meanwhile, the switching of the padded broadcast scene is flexible, the padded broadcast scene can be flexibly switched according to the superior instruction, namely the emergency information level, the program broadcasting of a receiver cannot be influenced, and the receiving experience of the receiver is greatly improved.
Description
Technical Field
The invention relates to the technical field of emergency broadcasting, in particular to a method and a system for switching a broadcast-padded scene of emergency broadcasting.
Background
The emergency broadcast is that when major natural disasters, emergency events, public health, social safety and other sudden public crises occur, the emergency broadcast can provide a rapid and quick information transmission channel, and the possible damage caused by the disaster information or the disaster is transmitted to people in the first time, so that people can know what happens in the first time, how to evacuate and avoid risks, and the loss of lives and properties is reduced to the minimum.
Broadcast the pad of current emergency broadcast usually need broadcast the broadcast content to the pad and customize, and later send to the terminal and broadcast the pad, and the pad is broadcast common means singlely, need take over the broadcast at current terminal completely, and the pad is broadcast the back that finishes, and the user need search for the platform again, and user's receipt is experienced poorly, and higher level's platform can't broadcast the content according to emergent rank regulation and control pad, leads to the practicality of broadcasting the pad to be low.
Disclosure of Invention
The invention provides an emergency broadcast padded-broadcast scene switching method and system for solving the technical problems of single emergency broadcast padded-broadcast means, poor user receiving experience and low practicability.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the embodiment provides an emergency broadcast padding scene switching method, which is applied to an emergency broadcast padding scene switching system, wherein the system comprises an emergency decoding module; the method comprises the following steps:
monitoring and receiving emergency data sent by a superior platform;
analyzing the emergency data according to an emergency protocol to obtain emergency information required by the multicast;
decoding the emergency information through an emergency decoding module to obtain an emergency information level and emergency audio and video data;
and according to the emergency information level, realizing the combined coding of the emergency audio and video data and the current output audio and video data, and realizing the broadcast output of the emergency broadcast on the terminal.
Further, the analyzing the emergency data according to the emergency protocol to obtain the emergency information required by the multicast includes:
analyzing the emergency data according to an emergency protocol to obtain analyzed data to be processed;
and preprocessing the analyzed data to obtain emergency information required by the cushion broadcast.
Further, the emergency information is in a TS stream format, and the emergency information includes emergency information level transmission data and audio and video transmission data.
Further, the parsing data includes one of an audio file or an audio data source address, subtitle data, and a picture.
Further, the preprocessing comprises at least one of text-to-audio processing, picture-to-video processing and subtitle-to-pixel processing.
Further, the emergency audio and video data comprises emergency subtitles, emergency audio and emergency video.
Further, the implementation of the combined encoding of the emergency audio and video data and the current output audio and video data according to the emergency information level and the implementation of the broadcast output of the emergency broadcast on the terminal specifically include:
judging the emergency information level, and realizing the combined coding of the emergency audio and video data and the current output audio and video data according to the emergency information level to realize the switching of the broadcast scene;
if the level of the emergency information is low, the emergency caption is broadcast and output on the current output;
if the emergency information level is middle, the current output is padded to output emergency subtitles and emergency audio;
and if the level of the emergency information is high, playing and outputting emergency captions, emergency audio and emergency video on the current output.
In addition, this embodiment also provides an emergency broadcast padded broadcast scene switching system, including:
the receiving module is used for receiving emergency data sent by the superior platform;
the protocol analysis module is used for analyzing and/or preprocessing the emergency data to obtain emergency information;
the emergency decoding module is used for decoding the emergency information to obtain the emergency information level and emergency audio and video data which can be used for cushion broadcasting; and
and the control coding module is used for coding the combination of the emergency audio and video data and the current output audio and video data according to the emergency information level and transmitting the combination to the terminal.
Further, the control coding module includes:
the switching controller is used for finishing the combination between the emergency audio and video data and the current output audio and video data according to the emergency information level; and
and the coding module is used for realizing the coding of the output audio and video data and outputting the coding to the terminal.
Further, the system further comprises:
and the caption superposition module is used for realizing superposition of the emergency caption on the audio and video output by the terminal.
According to the invention, after emergency information is obtained by receiving emergency data sent by a superior platform and analyzing the emergency data, corresponding emergency information level and emergency audio and video data are obtained by decoding through an emergency decoding module, and finally, the combination of the emergency audio and video data and the current output audio and video data is completed according to the emergency information level, so that the emergency information is broadcast on the terminal. The method is simple to use, the cushion broadcast program does not need to be formulated in advance, the audio and video data processing can be realized through analysis, the switching of the cushion broadcast scene is flexible, the cushion broadcast scene can be flexibly switched according to a higher-level instruction, namely the emergency information level, meanwhile, the original output audio and video data are continuous when the cushion broadcast is carried out, and the terminal does not need to search a channel for continuous broadcast after the cushion broadcast, so that the cushion broadcast practicability of the emergency broadcast is improved, the cushion broadcast is convenient and quick, the timely broadcast of the emergency broadcast is ensured, the program broadcast of a receiver is not influenced, and the receiving experience of the receiver is greatly improved.
Drawings
Fig. 1 is a structural flow chart of an emergency broadcast multicast scene switching method according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating a specific structure of step S102 in the emergency broadcast multicast scene switching method according to the embodiment of the present invention.
Fig. 3 is a flowchart illustrating a specific structure of step S104 in the emergency broadcast multicast scene switching method according to the embodiment of the present invention.
Fig. 4 is a block diagram of a system structure of an emergency broadcast multicast scene switching system according to an embodiment of the present invention.
Fig. 5 is a specific implementation example of an emergency broadcast multicast scene switching system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
Fig. 1 shows a flow chart of a structure of an emergency broadcast multicast scene switching method in this embodiment.
As shown in fig. 1, the method for switching an emergency broadcast padding scene is applied to an emergency broadcast padding scene switching system, where the system includes an emergency decoding module, and the emergency decoding module is independent from a decoding module of a current output source of a terminal in the system, that is, at least two decoding modules are arranged in the system, and one of the decoding modules serves as the emergency decoding module. The method specifically comprises the following steps:
101. and monitoring and receiving emergency data sent by the superior platform.
And the lower equipment receives the emergency data sent by the upper platform through the receiving module according to the output condition of the upper platform when the emergency condition occurs. Wherein, the monitoring means that the subordinate device can receive the emergency data in real time when the superior platform sends the emergency data.
Specifically, the receiving means of the lower level device includes, but is not limited to, ASI mode reception (Asynchronous Serial Interface), IP mode reception (network input), and QAM mode reception (Modulation reception).
102. And analyzing the emergency data according to the emergency protocol to obtain the emergency information required by the multicast.
And after acquiring the emergency equipment, the subordinate equipment analyzes the emergency data according to a corresponding emergency protocol, wherein the analysis operation is analyzed according to the standard of GDJ 083-.
For example, the necessary data includes subtitle data, a picture, and may further include one of an audio file or an audio data source address. The data correspond to each other, and the data can be correspondingly converted into emergency captions, emergency videos and emergency audios in emergency broadcasting.
The emergency information is obtained by processing emergency data, and is specifically transmission data of a TS stream (transport stream format), that is, after the emergency data is analyzed, corresponding valid data is synthesized into the TS stream to obtain the emergency information, and the TS stream data is subsequently transmitted to an emergency decoding module for subsequent decoding. Specifically, in some embodiments, the available information may include audio data, video data, subtitle data, and emergency information level data.
103. And decoding the emergency information through an emergency decoding module to obtain the emergency information level and the emergency audio and video data.
The subordinate device decodes the emergency information through the internal emergency decoding module to obtain decoding data matched with the format of the terminal output device, namely the emergency information level and the emergency audio and video data. The emergency information level is used for indicating the emergency level of the emergency information, and the emergency audio and video data are audio data, video data and subtitle data containing emergency situations to be played.
104. And according to the emergency information level, realizing the combined coding of the emergency audio and video data and the current output audio and video data, and realizing the broadcast output of the emergency broadcast on the terminal.
And the subordinate equipment determines a broadcast-padding scene according to the emergency information level, performs combined coding on the emergency audio and video data and the current audio and video data output by the output terminal, and finally realizes broadcast-padding output on the terminal.
In the cushion broadcasting process, because the decoding of the emergency information and the current output audio/video data is realized through the two decoding modules, the continuity of the PCR (Program Clock Reference) in the cushion broadcasting process, the DTS (Decode Time Stamp), the PTS (Predetermined Time system ) and the PID (unique identification mark) can be ensured, the information of the PMT (Program Map Table), the PAT (Program Association Table) and the like can be kept unchanged, so that the original output signal in the cushion broadcasting process is continuous, the channel searching is not needed again after the cushion broadcasting, and the continuous broadcasting is realized.
The emergency information levels comprise a low level, a medium level and a high level, the three levels have different combination modes respectively, and the grading of the levels is determined according to the severity or the emergency degree of the emergency situation.
The method for switching the broadcasting-backing scene in the embodiment has the advantages that the emergency information is obtained by receiving the emergency data sent by the superior platform and analyzing the emergency data, the corresponding emergency information level and the emergency audio and video data are obtained by decoding the emergency data through the emergency decoding module, and finally the combination of the emergency audio and video data and the current output audio and video data is completed according to the emergency information level, so that the broadcasting-backing of the emergency information on the terminal is realized. The method is simple to use, the cushion broadcast program does not need to be formulated in advance, the audio and video data processing can be realized through analysis, the switching of the cushion broadcast scene is flexible, the cushion broadcast scene can be flexibly switched according to a higher-level instruction, namely the emergency information level, meanwhile, the original output audio and video data are continuous when the cushion broadcast is carried out, and the terminal does not need to search a channel for continuous broadcast after the cushion broadcast, so that the cushion broadcast practicability of the emergency broadcast is improved, the cushion broadcast is convenient and quick, the timely broadcast of the emergency broadcast is ensured, the program broadcast of a receiver is not influenced, and the receiving experience of the receiver is greatly improved.
Fig. 2 shows a specific structure flowchart of step S102 in the emergency broadcast multicast scene switching method according to the embodiment.
In some embodiments, as shown in fig. 2, the step of analyzing the emergency data according to the emergency protocol to obtain the emergency information required by the multicast specifically includes:
201. and analyzing the emergency data according to the emergency protocol to obtain the analyzed data to be processed.
202. And preprocessing the analyzed data to obtain emergency information required by the cushion broadcast.
Preferably, the emergency information in step S102 is in a TS stream format, and the emergency information includes emergency information level transmission data and audio/video transmission data. More specifically, the audio/video transmission data includes audio data, video data, and subtitle data. In the aspect of audio, according to the analyzed information, the audio source that can be selected by the protocol analysis module includes one of an audio file carried by a file packet, a remote audio file, or a text-to-speech.
Preferably, the parsing data includes an audio file, subtitle data, and a picture.
Preferably, the preprocessing includes at least one of a text-to-audio processing, a picture-to-video processing, and a subtitle-to-pixel processing. Specifically, the lower device may convert the text into the audio data through a text-to-speech related software module, and convert the picture into the video data through a picture-to-video module, such as ffmpeg (picture-to-video software).
In some embodiments, the emergency audio and video data includes emergency subtitles, emergency audio, and emergency video.
Fig. 3 shows a specific structure flowchart of step S104 in the emergency broadcast multicast scene switching method according to the embodiment.
In some embodiments, as shown in fig. 3, the step of implementing, according to the emergency information level, combined encoding of the emergency audio/video data and the current output audio/video data, and implementing broadcast-on-demand output of the emergency broadcast on the terminal specifically includes:
301. and judging the emergency information level, and realizing the combined coding of the emergency audio and video data and the current output audio and video data according to the emergency information level to realize the switching of the broadcast scene.
302. And if the level of the emergency information is low, the current output is padded with the emergency caption.
303. And if the emergency information level is medium, the current output is padded with and output emergency subtitles and emergency audio.
304. And if the level of the emergency information is high, playing and outputting emergency captions, emergency audio and emergency video on the current output.
For better use experience, a specific example of the emergency broadcast multicast scenario switching method in this embodiment is provided, specifically, it is assumed that the receiving format adopts an AS mode I to receive a signal sent by a superior platform, at this time, the output module also adopts an ASI mode to send the signal to a terminal of a subordinate device, which is equivalent to adding the automatic multicast link in the previous link, and the others remain unchanged; finally, the program is sent to the user terminal, decoded and output to the display.
Specifically, in different emergency information levels, switching is performed to corresponding anchor scenes, which is as follows:
1) for example, weather forecast with heavy rain, the emergency level is low; a terminal user watches a program, a weather forecast caption rolls at the moment, sound and video are both source audio and video, and the user can know the weather forecast at the moment and does not influence the program watching;
2) for example, if the weather forecast of heavy rain exists, the emergency level is medium; a terminal user watches a program, a weather forecast caption rolls at the moment, voice broadcasting is carried out, and the picture still attracts the attention of the user;
3) for example, if an emergency such as an earthquake occurs, the emergency level is high; a terminal user watches programs, and when the program is watched, the subtitle is early warned for one day, the picture is forcibly switched into a prompt picture, and the extreme attention of the user is aroused along with voice broadcasting;
fig. 4 shows a system structure block diagram of the emergency broadcast multicast scene switching system in this embodiment.
As shown in fig. 4, the embodiment further provides an emergency broadcast break-in scene switching system, which specifically includes a receiving module 410, a protocol parsing module 420, an emergency decoding module 430, and a control encoding module 440. The receiving module 410 is mainly configured to receive emergency data sent by the upper platform, and send the emergency data to the negotiation analysis module. The protocol parsing module 420 is mainly configured to receive emergency data, parse and/or preprocess the emergency data, obtain emergency information, and send the emergency information to the emergency decoding module 430.
In the aspect of the emergency decoding module 430, the emergency decoding module is mainly used for receiving emergency information, decoding the emergency information to obtain an emergency information level and emergency audio/video data which can be used for cushion broadcasting, sending the decoded data to the control encoding module 440, finishing emergency information level judgment through the control encoding module 440, encoding the combination of the emergency audio/video data and the current output audio/video data according to the emergency information level, and transmitting the encoded combination to the terminal to realize cushion broadcasting.
In some embodiments, the control encoding module 440 includes a switching controller 441 and an encoding module 442, where the switching controller 441 is configured to complete the combination between the emergency audio and video data and the current output audio and video data according to the emergency information level, send the combined data to the encoding module 442 for encoding, and finally output to the terminal for playing and displaying.
In some embodiments, the system for switching the on-demand scene further includes a subtitle overlaying module 450, which is mainly used for implementing overlaying of the emergency subtitle on the audio/video output by the terminal.
Specifically, the emergency broadcast multicast scene switching system serves as subordinate equipment of an emergency broadcast route, receives emergency information of a superior platform, and according to an instruction, realizes multicast of the emergency information. Specifically, the system executes and implements the following steps through the receiving module 410, the protocol parsing module 420, the emergency decoding module 430 and the control encoding module 440:
monitoring and receiving emergency data sent by a superior platform;
analyzing the emergency data according to an emergency protocol to obtain emergency information required by the multicast;
the emergency information is decoded through an emergency decoding module 430 to obtain an emergency information level and emergency audio/video data;
and according to the emergency information level, realizing the combined coding of the emergency audio and video data and the current output audio and video data, and realizing the broadcast output of the emergency broadcast on the terminal.
Fig. 5 shows a specific implementation example of the emergency broadcast multicast scene switching system in the present embodiment.
For better operation experience, please refer to fig. 5, wherein the emergency source is emergency information sent by the upper platform, the input source is input of a currently played program of the terminal, and the emergency source processes emergency source data step by step through an IP input module, a protocol parsing processing module, a decoding module, a caption-to-pixel processing module, a switching controller, an FPGA OSD stacking module (Field Programmable Gate Array; On Screen Display, Screen menu type adjustment mode) and a coding module, and finally outputs the emergency source data to an output module, thereby implementing emergency information padding On the terminal.
The network management module can realize the operation of a user at a webpage end so as to complete program configuration, parameter setting, state display and information query.
The advantage of broadcasting scene switching system is filled up in emergent broadcast in this embodiment lies in, this system passes through the emergent data of higher level platform of receiving module receipt, the cooperation through each module of system inside is handled emergent data, combine emergent audio and video data and current output audio and video data according to emergent information rank, the broadcast is filled up to final completion, this mode switching is played in a flexible way to filling up, high durability and convenient use, and can handle according to higher level instruction is hierarchical, sustainable broadcast when having ensured to fill up broadcasting, need not to search for the platform again after filling up broadcasting, the validity of emergency broadcast and the use experience of recipient have been compromise.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An emergency broadcast padding scene switching method is characterized by being applied to an emergency broadcast padding scene switching system, wherein the system comprises an emergency decoding module; the method comprises the following steps:
monitoring and receiving emergency data sent by a superior platform;
analyzing the emergency data according to an emergency protocol to obtain emergency information required by the multicast;
decoding the emergency information through an emergency decoding module to obtain an emergency information level and emergency audio and video data;
and according to the emergency information level, realizing the combined coding of the emergency audio and video data and the current output audio and video data, and realizing the broadcast output of the emergency broadcast on the terminal.
2. The method for switching scenes of the broadcasting-on-demand of the emergency broadcast according to claim 1, wherein the analyzing the emergency data according to the emergency protocol to obtain the emergency information required by the broadcasting-on-demand comprises:
analyzing the emergency data according to an emergency protocol to obtain analyzed data to be processed;
and preprocessing the analyzed data to obtain emergency information required by the cushion broadcast.
3. The emergency broadcast shimming scene switching method according to claim 2, wherein the emergency information is in a TS stream format, and the emergency information includes emergency information level transmission data and audio-video transmission data.
4. The emergency broadcast break-in scene switching method according to claim 2 or 3, wherein the parsing data includes one of an audio file or an audio data source address, subtitle data, and a picture.
5. The emergency broadcast break-in scene switching method according to claim 4, wherein the preprocessing comprises at least one of a text-to-audio processing, a picture-to-video processing, and a subtitle-to-pixel processing.
6. The emergency broadcast break-in scene switching method according to claim 1, wherein the emergency audio/video data includes emergency subtitles, emergency audio and emergency video.
7. The emergency broadcast padded-broadcast scene switching method according to claim 1 or 6, wherein the implementation of the combined encoding of the emergency audio and video data and the current output audio and video data according to the emergency information level specifically includes:
judging the emergency information level, and realizing the combined coding of the emergency audio and video data and the current output audio and video data according to the emergency information level to realize the switching of the broadcast scene;
if the level of the emergency information is low, the emergency caption is broadcast and output on the current output;
if the emergency information level is middle, the current output is padded to output emergency subtitles and emergency audio;
and if the level of the emergency information is high, playing and outputting emergency captions, emergency audio and emergency video on the current output.
8. An emergency broadcast padded scene switching system, comprising:
the receiving module is used for receiving emergency data sent by the superior platform;
the protocol analysis module is used for analyzing and/or preprocessing the emergency data to obtain emergency information;
the emergency decoding module is used for decoding the emergency information to obtain the emergency information level and emergency audio and video data which can be used for cushion broadcasting; and
and the control coding module is used for coding the combination of the emergency audio and video data and the current output audio and video data according to the emergency information level and transmitting the combination to the terminal.
9. The emergency broadcast shimming scene switching system according to claim 8, wherein the control coding module comprises:
the switching controller is used for finishing the combination between the emergency audio and video data and the current output audio and video data according to the emergency information level; and
and the coding module is used for realizing the coding of the output audio and video data and outputting the coding to the terminal.
10. The emergency broadcast shimming scene switching system according to claim 8 or 9, characterized in that the system further comprises:
and the caption superposition module is used for realizing superposition of the emergency caption on the audio and video output by the terminal.
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| CN115103203A (en) * | 2022-05-06 | 2022-09-23 | 广东有线广播电视网络有限公司 | Control method and control system for realizing adaptive padding broadcast of live program |
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Application publication date: 20210205 |