CN116708691B - Guided broadcast switching system and method of media fusion platform - Google Patents
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Abstract
The invention discloses a guide switching system and a guide switching method of a media fusion platform, which relate to the technical field of multimedia and solve the technical problems that great labor cost is required when the guide switching is carried out on the media fusion platform in the prior art, accurate guide switching cannot be carried out aiming at live broadcast, and the actual experience of audiences is influenced; at least one group of sub-signal data is sequentially selected based on positive side content distribution and quality priority coefficients, and switching logic is generated according to the selected sub-signal data; according to the invention, sub-signal data are subjected to subdivision screening from multiple angles, so that the smooth and full presentation effect of the guided broadcast switching is ensured; the invention determines the associated subject of each sub-signal data in the multi-source signal data, and calculates the quality priority coefficient of each sub-signal data by combining the content characteristics and the signal characteristics; the invention evaluates the multi-source signal data from multiple dimensions in advance, screens out high-quality sub-signal data, and lays a data foundation for pilot switching.
Description
Technical Field
The invention belongs to the field of multimedia, relates to a guided broadcast switching technology of a media fusion platform, and particularly relates to a guided broadcast switching system and method of the media fusion platform.
Background
Media fusion refers to the combination, convergence and even fusion of all media and related elements thereof, and not only comprises the fusion of media forms, but also comprises the fusion of elements such as media functions, propagation means, ownership, organization structures and the like; not only is it intended to include all such combination of elements as text, body, technology, content, etc. as are associated therewith, but also to multi-domain, multi-industry cross-border collaboration.
In the prior art, programs to be played in one day are planned in advance, and information of each program is input into a broadcasting guide system one by one according to the plan to generate a planned program list. However, many channels are continuously played for 24 hours, the playing time is long, the number of programs is large, the programming and arrangement of the programs need to be calculated and operated in a complicated mode, and the programming and arrangement method is not suitable for live programs and affects the actual experience of audiences.
The invention provides a system and a method for guiding and broadcasting switching of a media fusion platform, which are used for solving the problems.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art; therefore, the invention provides a system and a method for guiding and broadcasting switching of a media fusion platform, which are used for solving the technical problems that great labor cost is required when the media fusion platform is used for guiding and broadcasting switching, accurate guiding and broadcasting switching cannot be performed aiming at live broadcasting, and the actual experience of audiences is influenced in the prior art.
In order to achieve the above object, a first aspect of the present invention provides a system for switching a media fusion platform, including a hub control module, and a data interaction module and an output preview module connected with the hub control module; the central control module acquires a bystander set according to the program type and multi-source signal data subjected to signal primary screening through the data interaction module; determining the associated subject of each sub-signal data in the multi-source signal data, and calculating the quality priority coefficient of each sub-signal data by combining the content characteristics and the signal characteristics; and creating a directory sequence by concatenating directory topics in the outline; extracting the intervals of adjacent directory topics in the directory sequence, acquiring a plurality of topic time periods, and setting the positive side content distribution in the topic time periods by combining the associated topics; the central control module sequentially selects at least one group of sub-signal data based on the positive side content distribution and the quality priority coefficient, generates switching logic according to the selected sub-signal data, embeds each sub-signal data into a corresponding theme period based on the switching logic, and acquires a preview segment; and sending the preview segment to an output preview module for the preview of the staff.
In the prior art, when the pilot broadcast is switched, a lot of effort is required to carry out programming and programming, and the program types and the program data are required to be acquired and cut in advance; the effort expended on media fusion platforms is geometrically increasing. For live broadcasting, the broadcasting guiding work mainly depends on broadcasting guiding personnel, and has high requirements on the working experience and quantity of the broadcasting guiding personnel, and the broadcasting guiding personnel has delay on judgment of a plurality of signal sources, so that the actual experience of audiences is influenced.
According to the invention, each piece of sub-signal data in the multi-source signal data is only required to be evaluated from the content characteristics and the signal characteristics according to the intelligent terminal set by the outline; determining distribution rules of all signal sub-data in all theme time periods according to the evaluation result, further determining switching logic, and automatically completing the pilot broadcasting work according to the switching logic; the invention automatically determines the switching logic in each type of broadcasting guide work, and can reduce the workload of broadcasting guide personnel on the basis of ensuring the experience of audiences.
The central control module is respectively communicated and/or electrically connected with the data interaction module and the output preview module; the output preview module is used for previewing the generated preview segment; the data interaction module is respectively communicated and/or electrically connected with the multi-source input device and the intelligent terminal. The central control module is mainly responsible for data processing; the data interaction module is used for acquiring various types of data; and the output preview module organizes the sub-signal data according to the switching logic and outputs the sub-signal data to the broadcasting guide personnel for short preview. The multi-source input device is used for acquiring multi-source signal data, and the multi-source input device is an authorized and authenticated video camera, recorder, computer and the like, so that the broadcasting guiding switching is mainly used for ensuring the smoothness and the ornamental value of output signals. The intelligent terminal comprises a smart phone or a computer and is used for acquiring a preset bystander; the outline of the bystander is actually an outline set in advance according to the program content, for example, links such as opening a screen, speaking, closing a screen and the like are mainly included in a conference.
The signal primary screening comprises quality verification and content verification, wherein the quality verification is to verify whether the multi-source signal data are valid or not, and the content verification is to verify whether the multi-source signal data are related to programs or not. The multi-source signal data includes video, text and voice, which are also individually sub-signal data.
The distribution of the positive side content in the present invention refers to the distribution proportion and the distribution type of the positive side content and the side content, such as how much the positive side content and the side content are filled in a certain theme period, and whether the positive side content and the side content are cross-filled or sequential filled. The forward content and the side content of the invention are defined differently under different associated topics; the forward content and the side content are primarily dependent on viewing angle or relevance to the associated topic. For video, the front view is the forward content, and the side view is the side content; or the forward content is directly related to the associated theme, and the lateral content is related to the side of the associated theme.
Preferably, the determining the associated subject of each sub-signal data in the multi-source signal data includes: determining the type of the theme which is met by the medium fusion platform; identifying and extracting the essential content of each sub-signal data, and calculating the matching degree of the essential content and each theme type; at least one theme type is filtered to be associated with the sub-signal data based on the matching degree and used as an associated theme.
The topic types in the invention comprise conferences, entertainment and news, and mainly originate from the range served by the media fusion platform; of course, the theme type may also be finer, such as a meeting, a casino, etc. The sub-signal data are divided according to the matching degree of the substantial content and the theme type in the sub-signal data, so that the sub-signal data can be further processed.
Preferably, the calculating the quality priority coefficient of each sub-signal data by combining the content feature and the signal feature includes: identifying content characteristics corresponding to the sub-signal data; when the content feature is forward content, st=1; when the content features are lateral content, then st= -1; acquiring signal characteristics of sub-signal data, and marking signal stability coefficients and content quality coefficients in the signal characteristics as XWX and NZ respectively; the quality priority coefficient ZYX of each sub-signal data is calculated by the zyx=αi×st× (β1×xwx+β2×nz) formula.
The invention needs to analyze the content output by the sub-signal data according to the division rule of the forward content and the side content, and assigns value to ST according to the analysis result. Meanwhile, signal characteristics of the multi-source input device corresponding to the sub-signal data are analyzed, whether the signal is stable or not and whether the content quality meets the requirement or not are mainly analyzed, a signal stability coefficient and a content quality coefficient are obtained, the larger the signal stability coefficient is, the more stable the signal is, and the larger the content quality coefficient is, the higher the content quality is.
The invention calculates the quality priority coefficient of the sub-signal data from the content characteristics and the signal characteristics, and can realize the screening of the sub-signal data according to the quality priority coefficient. The signal stability coefficient is mainly used for screening sub-signal data less affected by the environment, and particularly aims at a media fusion platform; the content quality coefficient is sub-signal data with clear content and logic, so that the influence on user experience is avoided; ST is advantageous to distinguish forward content from sideways content. In the invention, alpha i is a weight coefficient corresponding to the data type of each sub-signal data, and i is the number of the data type; if the weight coefficients corresponding to the video, the audio and the text are respectively alpha 1, alpha 2 and alpha 3, and alpha 1 is not less than alpha 2 and not more than alpha 3, the video, the audio and the text can be preferentially selected from the same forward content or the same side content, and finally the text is obtained. β1 and β2 are weight coefficients corresponding to the signal stability coefficient and the content quality coefficient, respectively.
Preferably, the generating a directory sequence includes: calling a bystander set according to the program types, and extracting directory topics from the bystander; and splicing the directory topics according to the time sequence in the bystander outline to generate a directory sequence.
The catalog topics in the invention are summarized on the contents displayed next and are equivalent to subtopics in papers, and each catalog topic can display the contents in a targeted way. Extracting a plurality of directory topics from the bystander, and connecting the directory topics in series according to the planned order to obtain a directory sequence. The method is used for extracting the topic and generating the directory sequence for the subsequent extraction of the topic time period and reasonably filling the topic time period.
Preferably, the setting the distribution of the positive side content in the theme time period in combination with the associated theme includes: determining the distribution proportion of the forward content and the lateral content in each theme period according to the associated theme; setting the distribution types of the forward content and the lateral content in each theme period, and integrating the distribution types with the distribution proportion into the distribution of the forward content and the lateral content of the corresponding theme period.
The invention mainly determines the distribution proportion and the distribution type of the middle forward content and the side content of the theme type according to experience; in other preferred embodiments, the viewer's preference under various theme types may be tested, and the distribution ratio and distribution type may be determined based on the test results. The content planning of each theme time period is realized by setting the distribution proportion and the distribution type, so that the follow-up targeted screening of each available sub-signal data is facilitated.
Preferably, the generating switching logic according to the selected sub-signal data includes: on the basis of positive side content distribution, screening a plurality of sub-signal data according to quality priority coefficients, and obtaining the time sequence of the screened sub-signal data in a subject period; the unique identifications of the sub-signal data are ordered in a time order to generate a switching logic.
After the distribution of the positive side content is determined, the positive side content and the lateral content are screened according to the positive and negative of the quality priority coefficient. On the basis of the forward content or the side content, sub-signal data with large quality priority coefficients are screened out to fill the theme period, so that the user can know when to switch to which sub-signal data in the theme period to form switching logic.
The invention fills the theme time period in advance or in real time according to the positive side content distribution and the quality priority coefficient of the sub-signal data to form the switching logic. And the automatic pilot switching can be completed by switching to the corresponding sub-signal data in real time according to the switching logic, so that time and labor are saved.
The second aspect of the present invention provides a method for switching a media fusion platform by multicast, comprising: acquiring a bystander set according to the program type and multi-source signal data subjected to signal primary screening; determining the associated subject of each sub-signal data in the multi-source signal data, and calculating the quality priority coefficient of each sub-signal data by combining the content characteristics and the signal characteristics; creating a directory sequence by concatenating directory topics in the outline; extracting the intervals of adjacent directory topics in the directory sequence, acquiring a plurality of topic time periods, and setting the positive side content distribution in the topic time periods by combining the associated topics; the positive side content distribution refers to the distribution proportion and the distribution type of the positive side content and the lateral content; sequentially selecting at least one group of sub-signal data based on the positive side content distribution and the quality priority coefficient, generating switching logic according to the selected sub-signal data, embedding each sub-signal data into a corresponding theme period based on the switching logic, and acquiring a preview segment; and sending the preview segment to an output preview module for the preview of the staff.
Compared with the prior art, the invention has the beneficial effects that:
1. the method comprises the steps of extracting intervals of adjacent directory topics in a directory sequence, acquiring a plurality of topic time periods, and setting positive side content distribution in the topic time periods by combining with related topics; sequentially selecting at least one group of sub-signal data based on the positive side content distribution and the quality priority coefficient, and generating switching logic according to the selected sub-signal data; according to the invention, sub-division screening is carried out on sub-signal data from multiple angles, so that smooth and full presentation effect of guided broadcast switching is ensured.
2. The invention sets a bystander according to the program type and multi-source signal data through signal preliminary screening; determining the associated subject of each sub-signal data in the multi-source signal data, and calculating the quality priority coefficient of each sub-signal data by combining the content characteristics and the signal characteristics; the invention evaluates the multi-source signal data from multiple dimensions in advance, screens out high-quality sub-signal data, and lays a data foundation for pilot switching.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the system principle of the present invention;
FIG. 2 is a schematic diagram of the method steps of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, an embodiment of a first aspect of the present invention provides a multicast switching system of a media fusion platform, which includes a hub control module, and a data interaction module and an output preview module connected with the hub control module; the central control module acquires a bystander set according to the program type and multi-source signal data subjected to signal primary screening through the data interaction module; determining the associated subject of each sub-signal data in the multi-source signal data, and calculating the quality priority coefficient of each sub-signal data by combining the content characteristics and the signal characteristics; and creating a directory sequence by concatenating directory topics in the outline; extracting the intervals of adjacent directory topics in the directory sequence, acquiring a plurality of topic time periods, and setting the positive side content distribution in the topic time periods by combining the associated topics; the central control module sequentially selects at least one group of sub-signal data based on the positive side content distribution and the quality priority coefficient, generates switching logic according to the selected sub-signal data, embeds each sub-signal data into a corresponding theme period based on the switching logic, and acquires a preview segment; and sending the preview segment to an output preview module for the preview of the staff.
The first step of the embodiment is that a central control module obtains a bystander outline set according to the program type and multi-source signal data through signal primary screening through a data interaction module; and determining the associated subject of each sub-signal data in the multi-source signal data, and calculating the quality priority coefficient of each sub-signal data by combining the content characteristics and the signal characteristics.
The method comprises the steps of screening multi-source signal data, specifically identifying the substantial content of sub-signal data, matching the substantial content with each theme type, setting the theme type corresponding to each sub-signal data according to the matching degree, and associating the sub-signal data with the theme type. The essence content can be understood as the content displayed by the sub-signal data, and if the displayed content is the speech of the related personnel in a conference, the conference theme can be associated; of course, the task arrangement of the multi-source input device corresponding to the sub-signal data can also be identified, and if the multi-source input device is arranged on a certain conference site for live conference broadcast or recorded broadcast, the conference theme can be associated.
According to the technical scheme, the conference theme is used for explaining the invention, so that sub-signal data related to the conference theme can be directly extracted. The sub-signal data of the embodiment need to be understood differently for different scenes; for live broadcast, the sub-signal data are real-time data, so that early recognition analysis mainly starts from the corresponding multi-source input equipment; for recording, the sub-signal data is prepared in advance, and the analysis and identification is aimed at the sub-signal data.
For the conference subject, the forward content can be video of the forward view angle of the speaker, such as video acquired by a video camera arranged in front of the speaker, or audio and text directly related to the conference, such as summary of the conference by related experts; the side content can be a video of the forward viewing angle of the participants, such as a video acquired by a camera arranged on the front side of the participants, or audio and text indirectly related to the conference, such as the opinion of the crowd of the conference obtained by street interview. Sub-signal data associated with a conference theme is identified for which an ST tag is set.
For live broadcasting, the signal characteristics are mainly acquired in a test process, for example, after equipment is set, the signal stability is tested and scored, and the score is used as a signal stability coefficient; the content presented by the testing process is scored in terms of quality and relevance, and the score is taken as a content quality coefficient.
Aiming at a recorded broadcast scene, the signal characteristics are mainly subjected to output test, such as outputting the obtained sub-signal data to a terminal to judge whether the output is stable or not, and scoring to obtain a signal stability coefficient; and directly carrying out content analysis on the acquired sub-signal data to obtain a content quality coefficient.
The quality priority coefficient of each sub-signal data is calculated, and the larger the quality priority coefficient is, the better the selection is. Up to this point, the conference theme includes forward content and side content.
The second step of this embodiment is to concatenate directory topics in the outline to generate a directory sequence; and extracting the intervals of adjacent directory topics in the directory sequence, acquiring a plurality of topic time periods, and setting the positive side content distribution in the topic time periods by combining the associated topics.
The outline of the conference theme can be understood as a conference flow, including a curtain-opening link, a speaking link, a prize-awarding/summarizing link and a curtain-closing link. For live conferences, no further partitioning of sub-signal data is required; because the sub-signal data obtained by each multi-source input device is consistent with each directory topic, regardless of signal delay. For conference recording, it is also necessary to further divide the sub-signal data, i.e. to classify the multi-source signal data according to the directory topic, i.e. to determine which directory topic the sub-signal data belongs to according to its content.
For conference subjects, the open-curtain link, the speaking link, the awarding/summarizing link and the closed-curtain link have definite time sequence. Each link corresponds to a theme period, and positive side content distribution is set for each theme period according to the conference theme; if the open links are distributed in sequence, the distribution ratio is 3: and 1, screening all sub-signal data corresponding to the curtain-opening link (the curtain-opening link belongs to a catalogue theme) according to the condition. And setting the filled sub-signal data in the theme time periods corresponding to all the catalog themes to obtain the switching logic.
The third step of this embodiment is that the central control module sequentially selects at least one group of sub-signal data based on the positive side content distribution and the quality priority coefficient, generates switching logic according to the selected sub-signal data, embeds each sub-signal data into a corresponding subject period based on the switching logic, and acquires a preview segment; and sending the preview segment to an output preview module for the preview of the staff.
After each theme time period is filled, the whole flow of the conference can be obtained after the filling results are spliced and presented. However, in order to cope with an emergency situation, it is preferable to select two sub-signal data each time sub-signal data is screened, so as to cope with timely remedy when an abnormality occurs in the optimal sub-signal data.
According to the embodiment, the sub-signal data selected according to each theme time period are integrated into the switching logic, the preview segments are output after the sub-signal data are obtained according to the switching logic, and the preview segments are presented to each worker. When the worker is not satisfied with previewing the clip, alternate sub-signal data may be selected by switching the alternate scheme in the logic.
The partial data in the formula is obtained by removing dimension and taking the numerical value for calculation, and the formula is obtained by simulating a large amount of acquired data through software and is closest to the real situation; the preset parameters and the preset threshold values in the formula are set by those skilled in the art according to actual conditions or are obtained through mass data simulation.
The working principle of the invention is as follows: acquiring a bystander set according to the program type and multi-source signal data subjected to signal primary screening; and determining the associated subject of each sub-signal data in the multi-source signal data, and calculating the quality priority coefficient of each sub-signal data by combining the content characteristics and the signal characteristics. Creating a directory sequence by concatenating directory topics in the outline; and extracting the intervals of adjacent directory topics in the directory sequence, acquiring a plurality of topic time periods, and setting the positive side content distribution in the topic time periods by combining the associated topics. And sequentially selecting at least one group of sub-signal data based on the positive side content distribution and the quality priority coefficient, generating switching logic according to the selected sub-signal data, embedding each sub-signal data into a corresponding theme period based on the switching logic, and acquiring a preview segment.
The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (3)
1. A media fusion platform guide switching system comprises a central control module, a data interaction module and an output preview module, wherein the data interaction module and the output preview module are connected with the central control module; the method is characterized in that:
the central control module acquires a bystander set according to the program type and multi-source signal data subjected to signal primary screening through the data interaction module; determining the associated subject of each sub-signal data in the multi-source signal data, and calculating the quality priority coefficient of each sub-signal data by combining the content characteristics and the signal characteristics; the signal primary screening comprises quality verification and content verification, and the multi-source signal data comprises video, characters and voice; and
creating a directory sequence by concatenating directory topics in the outline; extracting the intervals of adjacent directory topics in the directory sequence, acquiring a plurality of topic time periods, and setting the positive side content distribution in the topic time periods by combining the associated topics; wherein the positive side content distribution refers to the distribution proportion and the distribution type of the positive side content and the side content, and the positive side content and the side content are related to the associated theme;
the central control module sequentially selects at least one group of sub-signal data based on the positive side content distribution and the quality priority coefficient, generates switching logic according to the selected sub-signal data, embeds each sub-signal data into a corresponding theme period based on the switching logic, and acquires a preview segment; the preview segment is sent to an output preview module for the preview of staff;
the determining the associated theme of each sub-signal data in the multi-source signal data comprises the following steps:
determining the type of the theme which is met by the medium fusion platform; wherein the topic types include meetings, entertainment, and news;
identifying and extracting the essential content of each sub-signal data, and calculating the matching degree of the essential content and each theme type; screening at least one theme type based on the matching degree to be associated with the sub-signal data as an associated theme;
the calculating the quality priority coefficient of each sub-signal data by combining the content characteristics and the signal characteristics comprises the following steps:
identifying content characteristics corresponding to the sub-signal data; when the content feature is forward content, st=1; when the content features are lateral content, then st= -1; acquiring signal characteristics of sub-signal data, and marking signal stability coefficients and content quality coefficients in the signal characteristics as XWX and NZ respectively;
calculating a quality priority coefficient ZYX of each sub-signal data by a zyx=αi×st× (β1×xwx+β2×nz) formula; wherein, alpha i is a weight coefficient corresponding to the data type of each sub-signal data, i is the number of the data type, and beta 1 and beta 2 are weight coefficients corresponding to the signal stability coefficient and the content quality coefficient respectively;
the generating a catalog sequence includes:
calling a bystander set according to the program types, and extracting directory topics from the bystander; wherein catalog topic is a summary of the content presented next;
splicing directory topics according to the time sequence in the bystander outline to generate a directory sequence;
the setting of the positive side content distribution in the theme time period in combination with the associated theme comprises the following steps:
determining the distribution proportion of the forward content and the lateral content in each theme period according to the associated theme; wherein the forward content is distinguished from the lateral content from a content perspective or from an associated perspective with an associated topic;
setting the distribution types of the forward content and the lateral content in each theme period, and integrating the distribution types with the distribution proportion to the distribution of the forward content and the lateral content of the corresponding theme period; wherein the distribution type comprises cross distribution or sequential distribution;
the generating switching logic according to the selected sub-signal data comprises the following steps:
on the basis of positive side content distribution, screening a plurality of sub-signal data according to quality priority coefficients, and obtaining the time sequence of the screened sub-signal data in a subject period;
sorting the unique identifications of the sub-signal data according to a time sequence to generate a switching logic; wherein the unique identifier is set according to the source of the sub-signal data.
2. The system of claim 1, wherein the hub control module is in communication and/or electrical connection with the data interaction module and the output preview module, respectively; the output preview module is used for previewing the generated preview segment;
the data interaction module is respectively communicated and/or electrically connected with the multi-source input device and the intelligent terminal; the multi-source input device is subjected to authorization verification, and the intelligent terminal is used for acquiring the bystander.
3. A method for guiding and broadcasting switching of a media fusion platform, applied to the guiding and broadcasting switching system of a media fusion platform as set forth in any one of claims 1 to 2, comprising:
acquiring a bystander set according to the program type and multi-source signal data subjected to signal primary screening; determining the associated subject of each sub-signal data in the multi-source signal data, and calculating the quality priority coefficient of each sub-signal data by combining the content characteristics and the signal characteristics;
creating a directory sequence by concatenating directory topics in the outline; extracting the intervals of adjacent directory topics in the directory sequence, acquiring a plurality of topic time periods, and setting the positive side content distribution in the topic time periods by combining the associated topics; the positive side content distribution refers to the distribution proportion and the distribution type of the positive side content and the lateral content;
sequentially selecting at least one group of sub-signal data based on the positive side content distribution and the quality priority coefficient, generating switching logic according to the selected sub-signal data, embedding each sub-signal data into a corresponding theme period based on the switching logic, and acquiring a preview segment; and sending the preview segment to an output preview module for the preview of the staff.
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| CN108282598A (en) * | 2017-05-19 | 2018-07-13 | 广州华多网络科技有限公司 | A kind of software director system and method |
| CN111988536A (en) * | 2020-09-04 | 2020-11-24 | 南京广播电视集团有限责任公司 | Full-media bidirectional broadcast-merging platform |
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| CN108282598A (en) * | 2017-05-19 | 2018-07-13 | 广州华多网络科技有限公司 | A kind of software director system and method |
| CN111988536A (en) * | 2020-09-04 | 2020-11-24 | 南京广播电视集团有限责任公司 | Full-media bidirectional broadcast-merging platform |
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