CN111246222A - Method for realizing multicast control audio and video synchronization of PIS (peer to peer system) in recorded broadcast and broadcast-on-demand states - Google Patents
Method for realizing multicast control audio and video synchronization of PIS (peer to peer system) in recorded broadcast and broadcast-on-demand states Download PDFInfo
- Publication number
- CN111246222A CN111246222A CN202010200348.0A CN202010200348A CN111246222A CN 111246222 A CN111246222 A CN 111246222A CN 202010200348 A CN202010200348 A CN 202010200348A CN 111246222 A CN111246222 A CN 111246222A
- Authority
- CN
- China
- Prior art keywords
- group
- multicast
- playing
- controller
- broadcast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- H04N21/21—Server components or server architectures
- H04N21/214—Specialised server platform, e.g. server located in an airplane, hotel, hospital
- H04N21/2146—Specialised server platform, e.g. server located in an airplane, hotel, hospital located in mass transportation means, e.g. aircraft, train or bus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership
-
- 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
- H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
-
- 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
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
- H04N21/25808—Management of client data
-
- 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
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
-
- 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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41422—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance located in transportation means, e.g. personal vehicle
-
- 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
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
-
- 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
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
-
- 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
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4425—Monitoring of client processing errors or hardware failure
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Databases & Information Systems (AREA)
- Computer Networks & Wireless Communication (AREA)
- Aviation & Aerospace Engineering (AREA)
- Computer Graphics (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a method for realizing multicast control audio and video synchronization of PIS in recorded broadcast and broadcast-on-demand states, which comprises the following steps: A. the PIS central subsystem analyzes the broadcast table to determine all broadcast groups to be issued; B. through equipment state scoring, the central subsystem ranks the equipment in each group, sets the equipment with relatively low utilization rate as a group master playing controller, sets each group playing address at the same time, and issues a control command according to the group master and the group members; C. after receiving the control command, the group master play controller downloads the file according to the command file address, joins the multicast group according to the multicast address specified by the command after the downloading is finished, and starts the multicast in the group; D. the group member playing controller receives the control instruction and joins in the group multicast according to the command multicast address; E. the group member and the group master play controller start playing, the scheme of the invention uses the group multicast, can ensure the consistency of playing audio and video by all the play controllers in the group, and obviously improves the playing effect.
Description
Technical Field
The invention relates to the technical field of audio and video playing, in particular to a method for realizing multi-broadcast control audio and video synchronization of PIS in recorded broadcast and broadcast-on-demand states.
Background
In the urban rail transit industry, a passenger information display system (PIS) is an essential part of informatization construction and generally comprises a center subsystem, a station subsystem, a vehicle-mounted subsystem, a network subsystem and the like. The central subsystem pushes train information, video information, train load information, weather information and the like to a playing controller of a station through a network technology, the playing controller interprets and synthesizes received contents according to the definition of a current playing table and displays corresponding contents on a display screen, and generally different information is displayed in different sub-window areas of the playing controller.
For playing audio and video information, the playing controller mainly has two modes of live broadcasting and recorded broadcasting. The live broadcast, namely the broadcast controller receives the video stream of the central streaming media video server for broadcasting, and has the characteristic of uniform broadcasting of the whole network; and the recorded broadcast refers to that the broadcast controller downloads the video program in advance according to the definition of the broadcast table, and plays the video program locally in a specific time period. The recording and broadcasting picture quality is high, the control is flexible, and the method is particularly suitable for subway advertisement scenes. There is also a protection state, i.e. a seeding-on-the-mat state. When the live broadcast is interrupted, the play controller automatically enters a cushion broadcast state to play the cushion broadcast video file.
Different playing controllers are deployed for explaining and synthesizing different pictures, for example, different platform playing controllers can display the load information of different cars of a train to be entered, so that passengers can wait at a proper position in advance. However, the audio and video playing of a plurality of playing controllers often requires the same content, the playing requirements are strictly synchronous, and the sound effect noise and field disorder caused by asynchronism are avoided.
In the existing recording and broadcasting technology, a broadcast controller directly downloads a recording and broadcasting file according to an analyzed broadcast table definition, and after the downloading is finished, the recording and broadcasting file is broadcasted according to specified time.
In practical application, the playing controller devices in each area are generally made into a packet recording and playing table, and the scheme is as shown in fig. 1, which realizes the consistency of playing and arranging of multiple playing controllers, and when the clocks of multiple playing controllers are synchronized (generally, the clocks are synchronized to the standard clock), the multiple playing controllers are also basically synchronized when entering the recording and playing mode.
The existing scheme only realizes the consistency of the arrangement of a plurality of play controllers, and the time for entering the recording and playing mode is basically synchronous, but the following defects still exist:
the multicast sound making and video playing are asynchronous: under the scene of multi-broadcast control and separate recording and broadcasting, because each broadcast controller is an independent controller, program scheduling is completely and autonomously carried out, even if the broadcast controllers almost simultaneously enter a recording and broadcasting mode, the audio and video played by each broadcast controller cannot be strictly synchronized, and particularly after a period of time is accumulated, the problem of non-synchronization becomes more obvious.
The pressure of the performance of the PIS central subsystem is large: when a large number of play controllers are downloaded simultaneously, a large number of FTP/HTTP impacts need to be dealt with;
the downloading time is long: in the direct download mode, in order to reduce the system performance pressure, a grouping mode is generally adopted, and the central subsystem simultaneously participates in the download by scheduling the play controllers which keep reasonable numbers, so that the overall download time is prolonged.
Disclosure of Invention
The invention aims to provide a method for realizing the synchronization of multicast control audio and video of a PIS under the recording and broadcasting state and the broadcasting-on-demand state, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for realizing the synchronization of multicast control audio and video under the recording and broadcasting state and the broadcasting-on-demand state of PIS comprises the following steps:
A. the PIS central subsystem analyzes the broadcast table to determine all broadcast groups to be issued;
B. through equipment state scoring, the central subsystem ranks the equipment in each group, sets the equipment with relatively low utilization rate as a group master playing controller, sets each group playing address at the same time, and issues a control command according to the group master and the group members;
C. after receiving the control command, the group master play controller downloads the file according to the command file address, joins the multicast group according to the multicast address specified by the command after the downloading is finished, and starts the multicast in the group;
D. the group member playing controller receives the control instruction and joins in the group multicast according to the command multicast address;
E. the group member and group master play controller start playing.
As a further scheme of the invention: and C, starting a frame supplementing unicast service for the frame loss of the group member playing controller at the same time.
As a further scheme of the invention: further comprising step F: if the group member playing controller verifies that the frame is lost in the playing process, a frame supplementing request is sent to the group owner playing controller, and the group owner playing controller sends a target video frame response according to the frame supplementing request.
As a further scheme of the invention: further comprising the step G: when the group master play controller fails, the central subsystem reselects the group master play controller and issues the file again aiming at the new group master play controller.
As a further scheme of the invention: the generation of the group owner is either self-assigned by the client or negotiated within the group by the respective playout controllers.
Compared with the prior art, the invention has the beneficial effects that: the scheme of the invention uses the multicast in the group, can ensure the consistency of playing the audio and video by all the playing controllers in the group, obviously improves the playing effect, effectively reduces the number of downloading files, only downloads the files by the group master playing controller, and can start the multicast playing in the group after the group master downloading is finished, thereby reducing the total issuing time.
Drawings
Fig. 1 is a scheme diagram of the prior art.
FIG. 2 is a schematic diagram of the scheme of the invention.
Fig. 3 is a flow chart of the operation of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2-3, in an embodiment of the present invention, a method for implementing multicast control audio and video synchronization of a PIS in a recorded broadcast state and a multicast broadcast state includes the following steps:
A. the PIS central subsystem analyzes the broadcast table to determine all broadcast groups to be issued;
B. through equipment state scoring, the central subsystem ranks the equipment in each group, sets the equipment with relatively low utilization rate as a group master playing controller, sets each group playing address at the same time, and issues a control command according to the group master and the group members;
C. after receiving the control command, the group master play controller downloads the file according to the command file address, joins in a multicast group according to the multicast address specified by the command after the downloading is finished, starts the multicast in the group, and simultaneously starts the frame supplementing unicast service for the frame loss of the group member play controller;
D. the group member playing controller receives the control instruction and joins in the group multicast according to the command multicast address;
E. the group member and group master play controller starts playing;
F. if the group member playing controller verifies that the frame is lost in the playing process, initiating a frame supplementing request to the group owner playing controller, and sending a target video frame response by the group owner playing controller according to the frame supplementing request;
G. when the group master play controller fails, the central subsystem reselects the group master play controller and issues the file again aiming at the new group master play controller.
The present invention brings the following results:
audio and video of a plurality of play controllers are strictly synchronous: in the scheme of the invention, the audio and video streams played by the play controllers in the group are all multicast and pushed by the group master play controller, and data copying is carried out by depending on the hardware of the switch, so that the audio and video streams can be ensured to be received by all the play controllers simultaneously, and the same play progress and consistent audio and video are realized.
The performance overhead of the central subsystem is M/N of the traditional scheme, N is the parallel number of the download clients of the traditional scheme, and M is the number of the distributed groups. In the conventional scheme, a plurality of play controllers or station servers can download files to a central subsystem at the same time, that is, a plurality of downloaded connections are provided, and the number is assumed to be N, but the scheme of the present invention can understand that each group has only one connection, so that the performance overhead is M/N (N > > M) in the conventional scheme;
the file issuing time is effectively reduced. The invention only downloads the file by the group master play controller. The fewer the established delivery groups, the less the delivery time.
Example 2: on the basis of embodiment 1, the group broadcasting is changed into the group broadcasting, for example, hls or http-flv and other broadcasting protocols are used, and at this time, the group owner playing controller acts as a small broadcasting server in a group, and the generation of the group owner is assigned by the client or negotiated by each playing controller in the group.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A method for realizing the synchronization of multicast control audio and video under the recording and broadcasting state and the broadcasting-on-demand state of PIS is characterized by comprising the following steps:
A. the PIS central subsystem analyzes the broadcast table to determine all broadcast groups to be issued;
B. through equipment state scoring, the central subsystem ranks the equipment in each group, sets the equipment with relatively low utilization rate as a group master playing controller, sets each group playing address at the same time, and issues a control command according to the group master and the group members;
C. after receiving the control command, the group master play controller downloads the file according to the command file address, joins the multicast group according to the multicast address specified by the command after the downloading is finished, and starts the multicast in the group;
D. the group member playing controller receives the control instruction and joins in the group multicast according to the command multicast address;
E. the group member and group master play controller start playing.
2. The method of claim 1, wherein step C is performed while starting a frame-complementing unicast service for a group member play controller frame loss.
3. The method for realizing the multicast control audio and video synchronization of the PIS in the recording and broadcasting-on-demand states according to claim 1, further comprising the step F: if the group member playing controller verifies that the frame is lost in the playing process, a frame supplementing request is sent to the group owner playing controller, and the group owner playing controller sends a target video frame response according to the frame supplementing request.
4. The method for realizing the multicast control audio and video synchronization of the PIS in the recording and broadcasting state according to the claim 3, characterized by further comprising the step G: when the group master play controller fails, the central subsystem reselects the group master play controller and issues the file again aiming at the new group master play controller.
5. The method of claim 4, wherein the group master play controller outputs a UDP multicast video stream, and the group member play controller adds UDP multicast play.
6. The method for realizing the synchronization of the multicast control audio and video of the PIS under the recording and broadcasting and the broadcasting-on-demand states as claimed in claim 1, wherein the generation center system of the group owner generates the calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010200348.0A CN111246222B (en) | 2020-03-20 | 2020-03-20 | Method for realizing multicast control audio and video synchronization of PIS (peer to peer system) in recorded broadcast and broadcast-on-demand states |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010200348.0A CN111246222B (en) | 2020-03-20 | 2020-03-20 | Method for realizing multicast control audio and video synchronization of PIS (peer to peer system) in recorded broadcast and broadcast-on-demand states |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111246222A true CN111246222A (en) | 2020-06-05 |
| CN111246222B CN111246222B (en) | 2022-04-08 |
Family
ID=70877096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010200348.0A Active CN111246222B (en) | 2020-03-20 | 2020-03-20 | Method for realizing multicast control audio and video synchronization of PIS (peer to peer system) in recorded broadcast and broadcast-on-demand states |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111246222B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187778A (en) * | 2020-09-24 | 2021-01-05 | 烽火通信科技股份有限公司 | FLV data transmission method, system, device and readable storage medium |
| CN113596526A (en) * | 2021-07-28 | 2021-11-02 | 汉桑（南京）科技有限公司 | Method and system for determining main playing device |
| CN117880575A (en) * | 2024-01-02 | 2024-04-12 | 北京智行众悦科技有限公司 | Digital multimedia broadcasting control terminal based on 5G |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1658616A (en) * | 2005-03-22 | 2005-08-24 | 中国科学院计算技术研究所 | Synchronous receiving structare of machine group and design method thereof |
| CN101547109A (en) * | 2009-05-06 | 2009-09-30 | 东华大学 | Information multicast system and broadcast control method thereof |
| US20090305712A1 (en) * | 2005-06-08 | 2009-12-10 | Telecom Italia S.P.A. | Method and system for transmitting content to a plurality of users of a mobile communication network |
| CN101998143A (en) * | 2009-08-26 | 2011-03-30 | 中兴通讯股份有限公司 | Method for multicasting video data, unicast server and client |
| US20130254419A1 (en) * | 2003-07-28 | 2013-09-26 | Sonos, Inc. | System and method for synchronizing operations among a plurality of independently clocked digital data processing devices |
| CN104639347A (en) * | 2013-11-07 | 2015-05-20 | 北大方正集团有限公司 | Multi-cluster monitoring method and device, and system |
| CN105101106A (en) * | 2015-07-16 | 2015-11-25 | 上海斐讯数据通信技术有限公司 | Load balancing method and system of wireless network |
| CN105978847A (en) * | 2015-12-03 | 2016-09-28 | 乐视致新电子科技（天津）有限公司 | Data synchronization method and system |
| US20170273044A1 (en) * | 2015-09-30 | 2017-09-21 | Apple Inc. | Synchronized playback and control of media |
| CN109121016A (en) * | 2018-08-06 | 2019-01-01 | 深圳宇翊技术股份有限公司 | A kind of efficient transmission method for realizing PIS data file based on IP multicast |
| CN109327810A (en) * | 2018-09-29 | 2019-02-12 | 北京中兴高达通信技术有限公司 | A kind of subway PIS business method of multicasting and device based on the cluster communication of the broadband LTE |
| CN109803235A (en) * | 2017-11-17 | 2019-05-24 | 普天信息技术有限公司 | The system and method for passenger information system business realizing cluster communication |
-
2020
- 2020-03-20 CN CN202010200348.0A patent/CN111246222B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130254419A1 (en) * | 2003-07-28 | 2013-09-26 | Sonos, Inc. | System and method for synchronizing operations among a plurality of independently clocked digital data processing devices |
| CN1658616A (en) * | 2005-03-22 | 2005-08-24 | 中国科学院计算技术研究所 | Synchronous receiving structare of machine group and design method thereof |
| US20090305712A1 (en) * | 2005-06-08 | 2009-12-10 | Telecom Italia S.P.A. | Method and system for transmitting content to a plurality of users of a mobile communication network |
| CN101547109A (en) * | 2009-05-06 | 2009-09-30 | 东华大学 | Information multicast system and broadcast control method thereof |
| CN101998143A (en) * | 2009-08-26 | 2011-03-30 | 中兴通讯股份有限公司 | Method for multicasting video data, unicast server and client |
| CN104639347A (en) * | 2013-11-07 | 2015-05-20 | 北大方正集团有限公司 | Multi-cluster monitoring method and device, and system |
| CN105101106A (en) * | 2015-07-16 | 2015-11-25 | 上海斐讯数据通信技术有限公司 | Load balancing method and system of wireless network |
| US20170273044A1 (en) * | 2015-09-30 | 2017-09-21 | Apple Inc. | Synchronized playback and control of media |
| CN105978847A (en) * | 2015-12-03 | 2016-09-28 | 乐视致新电子科技（天津）有限公司 | Data synchronization method and system |
| CN109803235A (en) * | 2017-11-17 | 2019-05-24 | 普天信息技术有限公司 | The system and method for passenger information system business realizing cluster communication |
| CN109121016A (en) * | 2018-08-06 | 2019-01-01 | 深圳宇翊技术股份有限公司 | A kind of efficient transmission method for realizing PIS data file based on IP multicast |
| CN109327810A (en) * | 2018-09-29 | 2019-02-12 | 北京中兴高达通信技术有限公司 | A kind of subway PIS business method of multicasting and device based on the cluster communication of the broadband LTE |
Non-Patent Citations (1)
| Title |
|---|
| 王小平: "一种轨道交通PIS组播实现方法的研究", 《数码世界》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187778A (en) * | 2020-09-24 | 2021-01-05 | 烽火通信科技股份有限公司 | FLV data transmission method, system, device and readable storage medium |
| CN113596526A (en) * | 2021-07-28 | 2021-11-02 | 汉桑（南京）科技有限公司 | Method and system for determining main playing device |
| CN117880575A (en) * | 2024-01-02 | 2024-04-12 | 北京智行众悦科技有限公司 | Digital multimedia broadcasting control terminal based on 5G |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111246222B (en) | 2022-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111246222B (en) | Method for realizing multicast control audio and video synchronization of PIS (peer to peer system) in recorded broadcast and broadcast-on-demand states | |
| CN101917391B (en) | Method for playing network video and system for playing network video | |
| CN101854533B (en) | Frequency channel switching method, device and system | |
| CN101917568B (en) | Streaming media technology-based network video player and playing system | |
| CN112752109B (en) | Video playing control method and system | |
| CN106060632B (en) | System and method for controlling bullet screen of program site | |
| CN108347622B (en) | Multimedia data pushing method and device, storage medium and equipment | |
| CN103198851B (en) | A kind of multiple terminals synchronous broadcast method based on time-stamping messages | |
| US10341672B2 (en) | Method and system for media synchronization | |
| US11044497B1 (en) | Method of unified video switching and advertisement splicing within consumer devices | |
| JP2007274019A (en) | Digital information distributing system and method thereof | |
| CN106604065A (en) | System and method for realizing multi-screen video playing in same screen | |
| US20140205261A1 (en) | Interactive audio/video system and method | |
| CN112351303B (en) | Video sharing method and system in network conference and readable storage medium | |
| CN103281595A (en) | Method of information publishing internet of things terminal multi-screen combination display | |
| CN106572383A (en) | Video switching method and system based on multi-screen interaction | |
| CN113691847A (en) | Multi-screen frame synchronization method and device | |
| CN101080017B (en) | A playing system and method of additional programs | |
| CN112770141B (en) | Video delivery method and device for mobile equipment and computer readable storage medium | |
| KR102273439B1 (en) | Multi-screen playing system and method of providing real-time relay service | |
| CN114339370A (en) | Slow live broadcast system and method for automatically switching pictures | |
| CN109121016B (en) | Method for realizing efficient transmission of PIS data file based on IP multicast | |
| CN113612728B (en) | Streaming media playing method, transmission equipment and system | |
| KR101242478B1 (en) | Real time personal broadcasting system using media jockey based on multi-angle | |
| US11856242B1 (en) | Synchronization of content during live video stream |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |