WO2019112360A1 - Procédé et système de diffusion en direct retardée - Google Patents

Procédé et système de diffusion en direct retardée Download PDF

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Publication number
WO2019112360A1
WO2019112360A1 PCT/KR2018/015481 KR2018015481W WO2019112360A1 WO 2019112360 A1 WO2019112360 A1 WO 2019112360A1 KR 2018015481 W KR2018015481 W KR 2018015481W WO 2019112360 A1 WO2019112360 A1 WO 2019112360A1
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WO
WIPO (PCT)
Prior art keywords
live
file information
file
delayed
broadcast
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PCT/KR2018/015481
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English (en)
Korean (ko)
Inventor
오재원
윤병조
박기영
노혜성
양승관
Original Assignee
네이버 주식회사
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Publication of WO2019112360A1 publication Critical patent/WO2019112360A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—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
    • H04N21/2625—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 for delaying content or additional data distribution, e.g. because of an extended sport event
    • 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
    • H04N21/218—Source of audio or video content, e.g. local disk arrays
    • H04N21/2187—Live feed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • 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
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • 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
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/23605—Creation or processing of packetized elementary streams [PES]
    • 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

Definitions

  • the following description relates to a method and system for delayed live streaming, and more particularly, to a delayed live streaming method and a delayed live streaming system capable of providing a delayed live streaming service so that a live broadcast transmitted by a sender can be viewed from a delayed time, And a computer program stored in a computer-readable recording medium for causing the computer to execute the delayed live-streaming method and a recording medium thereof.
  • Korean Patent Laid-Open Publication No. 10-2014-0115661 discloses a method, a server, and a system for providing a bi-directional live streaming service to a plurality of user terminals.
  • live broadcast services for relaying various viewers who wish to view live broadcasts of various senders and senders who desire to broadcast, such as a personal broadcast live broadcast service, in which anyone can broadcast a video.
  • VOD contents are generated and served by using the streaming data of the broadcasting after providing the broadcasting in real time.
  • viewers who watch broadcasts from the middle after the start of broadcasting can not watch broadcasts from the middle of the broadcasts, and can watch broadcasts from the beginning through VOD contents only after the broadcast is completed.
  • a delayed live-broadcast system and a delayed live-broadcast system capable of live-broadcasting a live broadcast at a delayed time after the start time, and a computer program stored in a computer-readable recording medium for causing the computer to execute the live- Lt; / RTI >
  • the delay live live start time is preset to a time after the live live start time;
  • the transmission segment file is generated by encoding the streaming data transmitted from the sender's terminal based on the live broadcast start time and the file information for indicating the generated transmission segment file is generated in accordance with the generation sequence of the transmission segment file Accumulating in the first reproduction file information; Extracting file information accumulated in the first playback file information based on the delayed live-broadcast start time according to the order in which the transport segment file is generated, and adding the extracted file information to the second playback file information; And providing a delayed live broadcast service for the sender's broadcast using the second play file information.
  • a computer program stored on a computer readable recording medium coupled to a computer to cause the computer to execute the delayed live-streaming method.
  • a computer readable recording medium having recorded thereon a program for causing a computer to execute the delayed live-streaming method.
  • a delayed live-broadcast system comprising: at least one processor configured to execute a computer-readable instruction, wherein the at least one processor manages a live broadcast start time and a delay live start time for a sender's broadcast; Wherein the delayed live-streaming start time is preset to a time after the live-stream start time, and for the transmitted segment file generated by encoding the streaming data transmitted from the sender's terminal based on the live- And accumulates the file information accumulated in the first reproduction file information on the basis of the delayed live broadcast start time in accordance with the sequence of generation of the transmission segment file, The files are extracted in the order they were created Added to the second reproduction information file, and the second provides a delay live system, characterized in that using the second reproduction information file operation performed by providing a delay live broadcast service for the broadcast of said transmission.
  • FIG. 1 is a diagram illustrating an example of a delayed live streaming according to an embodiment of the present invention. Referring to FIG. 1
  • FIG. 2 is a flowchart illustrating an example of a delayed live-streaming method according to an embodiment of the present invention.
  • FIG. 3 is a diagram illustrating an example of first playback file information and second playback file information according to an embodiment of the present invention.
  • FIG. 4 is a block diagram illustrating an example of a physical machine in accordance with one embodiment of the present invention.
  • FIG. 5 is a view showing an example of the overall configuration of an open type live broadcast platform according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating an example of a configuration of a live streaming farm according to an embodiment of the present invention.
  • FIG. 7 is a diagram illustrating an example of load balancing of the L4 switch according to an embodiment of the present invention.
  • FIG. 8 is a diagram illustrating an example of the configuration of an encoder server pool according to an embodiment of the present invention.
  • FIG. 9 is a diagram illustrating an example of the configuration of a VOD farm according to an embodiment of the present invention.
  • FIGS. 10 to 12 are views showing an example of a method of operating an open type live broadcasting platform according to an embodiment of the present invention.
  • FIG. 1 is a diagram illustrating an example of a delayed live streaming according to an embodiment of the present invention.
  • the first arrow 110 indicates the live broadcast start time 'AM 10:00' for the sender's broadcast
  • the second arrow 120 indicates the live broadcast end time 'AM 11:00' for the sender's broadcast have.
  • the sender's terminal can transmit streaming data for broadcasting.
  • This live start time may correspond to the time at which the streaming data is transmitted from the sender's terminal.
  • the live end time may correspond to the time when the transmission of the streaming data from the sender's terminal ends.
  • streaming data transmitted from a sender terminal can be received, and the received streaming data can be encoded through an encoder to generate transmission segment files.
  • the generated transmission segment files are provided to viewers' terminals So that live broadcasting can proceed.
  • the third arrow 130 in FIG. 1 indicates the delayed live broadcast start time 'AM 10:30' for the sender's broadcast
  • the fourth arrow 140 indicates the delayed live broadcast end time 'AM 11:30 Respectively.
  • the delayed live-streaming start time may be set to a time after the live-streaming start time, preferably, between the live-stream start time and the live ending time.
  • the delayed live-streaming start time may be set to a relative time as 30 minutes after the live-stream start time.
  • the delayed live-streaming method according to this embodiment can be performed by the delayed live-streaming system according to this embodiment.
  • the delayed live-streaming system may be implemented in at least one physical machine and may be implemented by at least one processor included in at least one physical machine, such that the delayed live- Operations can be performed.
  • the delayed live streaming system can manage the live streaming start time and the delayed live streaming start time for the sender's broadcast.
  • the live start time and the delayed live start time have been described in detail with reference to FIG.
  • the delayed live streaming system may further manage the live streaming end time for the sender's broadcast in step 201 for the case where the delayed live streaming start time is preset as the time between the live streaming start time and the live ending time.
  • the delayed live streaming system can confirm the start of live streaming.
  • the live start time may correspond to the time at which the streaming data is transmitted from the sender's terminal, so that the start of the live streaming may be confirmed through the live streaming start time, but the streaming data May be confirmed by whether or not the data is transmitted.
  • Step 203 may be performed if the live feed is started, and the live live feed system may wait until the live feed is started if live feed is not started.
  • the delayed live streaming system may generate stream segment data by encoding the streaming data transmitted from the sender's terminal based on the live streaming start time.
  • the encoding of the streaming data may be performed by an encoder.
  • an encoder For example, when streaming data is encoded using an HLS (HTTP Live Streaming) algorithm, files for TS (Transport Stream) format may be generated as a transmission segment file.
  • HLS HTTP Live Streaming
  • TS Transport Stream
  • the delayed live-streaming system may receive the generated transmit segment files encoded over a separate encoder and step 203 may be omitted.
  • the delayed live streaming system may update the live file information for live streaming to include file information for indicating the most recently generated N or less transmission segment files. For example, suppose N is 3. At this time, if the first transmission segment file is generated, the delayed live streaming system can generate live playback file information and add the first file information of the first transmission segment file to the live playback file information. Thereafter, when the second transmission segment file is generated, the delayed live streaming system can add the second file information of the second transmission segment file to the live playback file information. Thereafter, when the third transmission segment file is generated, the delayed live streaming system can add the third file information of the third transmission segment file to the live playback file information.
  • the delayed live streaming system must include at least three pieces of file information that are most recently generated in the live playback file information. Therefore, The fourth file information can be added to the live file reproduction file information. If the fifth transmission segment file is generated, it can be easily understood that the delayed live streaming system can add the fifth file information of the fifth transmission segment file to the live playback file information except for the second file information.
  • the delayed live streaming system can provide a live streaming service for the sender's broadcast using the live streaming file information.
  • the file information described above may include address information for accessing the corresponding transmission segment file through the network.
  • live playback file information may be implemented as a file with the extension m3u8.
  • the live playback file information may include address information for the most recent N or fewer transmission segment files.
  • the live streaming playback file information can be provided to the viewer's terminal, and the player installed and driven in the terminal of the viewer can receive the most recent N or less transmission segments through the address information of the file information included in the live playback file information, The user of the viewer can be controlled to download the files. At this time, the player can play the broadcast of the sender in real time by reproducing the transmission segment files to be downloaded.
  • the playback file information for live broadcast can be updated.
  • the player driven on the viewer's terminal receives the playback file information continuously updated and compares the playback file information with the previously received playback file information , It is possible to identify transmission segment files to be further downloaded.
  • steps 204 and 205 are operations for the live service, which may be omitted in the delay live method according to an embodiment.
  • the delayed live streaming system may accumulate the file information for indicating the generated transmission segment file in the accumulation playback file information according to the order in which the transmission segment file is generated. Due to the nature of live streaming, general live streaming services do not store file information of transmission segment files for broadcast portions already provided to viewers. For example, even though the transmission segment files are stored somewhere for a live service, the order of these transmission segment files and separate reproduction file information for providing address information are not generated. In this embodiment, the file information of the transmission segment files for the broadcast of the sender may be accumulated and stored in the accumulation playback file information in order to provide the delayed live streaming service and / or the time machine service for the live stream which will be described later.
  • the delayed live streaming system can confirm whether or not delay live streaming is started. For example, the delayed live streaming system can confirm whether or not the delayed live streaming start time has come. When the delayed live-streaming start time comes, the delayed live-streaming system can perform step 208. [ On the other hand, if the delayed live-streaming has not been started yet because the live-streaming may still be in progress even though the delayed live-streaming start time has not been reached, the delayed live-streaming system can perform step 203 again.
  • the delayed live streaming system may extract the file information accumulated in the accumulation playback file information according to the order in which the transmission segment file is generated, and add the extracted file information to the delayed live streaming playback file information.
  • the delayed live streaming system can periodically extract the file information in the accumulative playback file information in the accumulated order and add it to the delayed live streaming playback file information.
  • the delayed live streaming system can provide a delayed live streaming service for the sender's broadcast using the delayed live streaming playback file information.
  • the delayed live streaming system can transmit delayed live streaming playback file information to a terminal of a viewer requesting a delayed live streaming service.
  • the player installed and driven in the terminal of the viewer can sequentially download the transmission segment files for delaying the broadcasting of the sender from the beginning through the file information included in the delayed live streaming reproduction file information. Since the file information of the transmission segment file is periodically added to the delayed live streaming playback file information, the player also periodically receives the delayed live streaming file information from the delayed live streaming system and compares it with the previously received delayed live streaming playback file information, It becomes possible to identify a transmission segment file to be added (added). Therefore, the viewer can watch the broadcast from the beginning even after a certain time has elapsed from the start time of the broadcast of the sender.
  • the delayed live streaming system can confirm whether the live streaming has ended.
  • the live end time may correspond to the end time of the transmission of the streaming data from the sender's terminal, so that the end of live streaming may be confirmed through the live stream end time, And may be confirmed through whether or not the transmission of the streaming data is ended.
  • Step 211 may be performed if the live streaming is terminated, and if the live streaming is not terminated, the delayed live streaming system may perform step 203 to continuously provide the live streaming service and the delayed live streaming service.
  • the delayed live streaming system can confirm whether or not the delayed live streaming has ended. Since the delayed live streaming can be continued even if the live streaming ends in step 210, the delayed live streaming system can confirm whether or not the delay live streaming is finished based on the delayed live stream end time. If the delayed live-streaming has not yet ended, the delayed live-streaming system can continue to provide delayed live-streaming services by performing step 208. [ If the delayed live-streaming is terminated, the delayed live-streaming method may be terminated.
  • FIG. 3 is a view showing an example of the accumulation playback file information and the delayed live-stream reproduction file information according to an embodiment of the present invention.
  • FIG. 3 shows an example of a process in which file information managed through the accumulative playback file information 310 and the delayed live-streaming playback file information 320 changes with the passage of time.
  • the file information "AAAstore_10_00_0.ts” may refer to the first ('0') transmission segment file generated at the time '00' stored at 'AAAstore' at '00'.
  • the file information "AAAstore_10_00_0.ts" itself may be the file name of the corresponding transmission segment file.
  • the address information of the corresponding transmission segment file can be obtained, for example, by adding "/AAAstore_10_00_0.ts" to the end of the predetermined address.
  • the delayed live streaming system can extract the file information of the first transmission segment file displayed through the first dotted line box 331 from the accumulation playback file information 310 and add it to the delayed live streaming playback file information 320.
  • the second dotted line box 332 shows the file information of the first transmission segment file added to the delayed live streaming playback file information 320.
  • the third dotted line box 341 shows a state in which the file information of the transmission segment file generated at 10:33 is accumulated in the accumulation playback file information 310 .
  • the delayed live streaming system can extract the file information of the second transmission segment file displayed through the fourth dotted line box 342 from the accumulation playback file information 310 and add it to the delayed live streaming playback file information 320 have.
  • the fifth dotted line box 343 shows the file information of the second transmission segment file added to the delayed live streaming playback file information 320.
  • the sixth dotted line box 351 shows the accumulation of the file information of the transmission segment file generated at 10:36 in the accumulation playback file information 310.
  • the delayed live streaming system can extract the file information of the third transmission segment file displayed through the seventh dotted line box 352 from the accumulation playback file information 310 and add it to the delayed live streaming playback file information 320 have.
  • An eighth dotted line box 353 shows a state in which file information of the third transmission segment file is added to the delayed live streaming playback file information 320.
  • the unit time may correspond to the playback time of one transmission segment file.
  • the delay live live playback file information 320 is most recently May be updated so as to keep the added M (M is a natural number) file information or less. For example, when M is 3, the file information of the transmission segment file generated at 10:39 is added to the delayed live-streaming playback file information 320, and the file information of the first transmission segment file (the second dotted line box 332) may be removed from the delayed live-stream reproduction file information 320.
  • the delayed live-playing playback file information 320 which is accumulated so as to maintain M file information or less, is advantageous in that it provides time- It is possible to reduce the capacity of the delayed live-streaming playback file information 320 and the cost required for comparison of the file information.
  • the viewer sequentially downloads and reproduces the transmission segment files for the delayed live broadcasting through the delayed live streaming file information, and provides the delayed live streaming service from the beginning in a state where the sender's broadcast is delayed for a predetermined time (30 minutes in this embodiment) You will receive.
  • FIG. 4 is a block diagram illustrating an example of a physical machine in accordance with one embodiment of the present invention.
  • the physical machine according to the present embodiment may be implemented by the computer device 400 shown in FIG. 4, and the delayed live-streaming method according to one embodiment may be performed by such a computer device 400.
  • a computer program according to an embodiment may be installed and operated in the computer device 400, and the computer device 400 may perform a delayed live-broadcasting method under the control of a computer program that is driven.
  • the computer device 400 may include a memory 410, a processor 420, a communication interface 430, and an input / output interface 440, as shown in FIG.
  • the memory 410 may be a computer-readable recording medium and may include a permanent mass storage device such as a random access memory (RAM), a read only memory (ROM), and a disk drive.
  • the non-decaying mass storage device such as the ROM and the disk drive may be included in the computer device 400 as a separate persistent storage device separate from the memory 410.
  • the memory 410 may store an operating system and at least one program code. These software components may be loaded into the memory 410 from a computer readable recording medium separate from the memory 410.
  • Such a computer-readable recording medium may include a computer-readable recording medium such as a floppy drive, a disk, a tape, a DVD / CD-ROM drive, and a memory card.
  • the software components may be loaded into the memory 410 via the communication interface 430 rather than from a computer readable recording medium.
  • the software components may be loaded into the memory 410 of the computer device 400 based on a computer program installed by the files received via the network 460.
  • the processor 420 may be configured to process instructions of a computer program by performing basic arithmetic, logic, and I / O operations.
  • the instructions may be provided to the processor 420 by the memory 410 or communication interface 430.
  • the processor 420 may be configured to execute a command received in accordance with a program code stored in a recording device, such as the memory 410.
  • the communication interface 430 may provide functionality for the computer device 400 to communicate with another device (e.g., the storage devices described above) via the network 460.
  • another device e.g., the storage devices described above
  • signals, commands, data, files, etc., from other devices may be received by the computer device 400 via the communication interface 430 of the computer device 400 via the network 460.
  • Signals, data, and the like received through the communication interface 430 may be transferred to the processor 420 or the memory 410 and the files and the like may be transferred to a storage medium Permanent storage).
  • the input / output interface 440 may be a means for interfacing with the input / output device 450.
  • the input device may include a device such as a microphone, a keyboard or a mouse, and an output device may include a device such as a display, a speaker, and the like.
  • the input / output interface 440 may be a means for interfacing with a device having integrated functions for input and output, such as a touch screen.
  • the input / output device 450 may be composed of the computer device 400 and one device.
  • the computing device 400 may include fewer or more components than the components of FIG. However, there is no need to clearly illustrate most prior art components.
  • the computer device 400 may be implemented to include at least some of the input / output devices 450 described above, or may further include other components such as a transceiver, database, and the like.
  • the delayed live broadcasting method may be performed through a combination of a plurality of computer devices.
  • a structure of an open-type live streaming platform that can be implemented as an example of a delayed live streaming system performing a delayed live streaming method will be described.
  • FIG. 5 is a view showing an example of the overall configuration of an open type live broadcast platform according to an embodiment of the present invention
  • FIG. 6 is a view showing an example of the configuration of a live streaming farm according to an embodiment of the present invention
  • 7 is a diagram illustrating an example of load balancing of an L4 switch according to an embodiment of the present invention
  • FIG. 8 is a diagram illustrating an example of a configuration of an encoder server pool according to an embodiment of the present invention.
  • 9 is a diagram illustrating an example of a configuration of a VOD farm according to an embodiment of the present invention.
  • the open live streaming platform 500 includes a live streaming farm 510, a coordinator 520, and a VOD (video on demand) farm 530 can do.
  • the live streaming farm 510 may process the streaming data transmitted from the sender 540 and relay the streaming data to the viewer 550.
  • the live streaming farm 510 includes a first L4 switch 610, a publishing point server pool 620, an encoder server pool 630, A Distributed File System 640, a Proxy Server Pool 650, and a second L4 switch 660.
  • 5 shows one sender 540 and one viewer 550.
  • the sender 540 and the viewer 550 may refer to a plurality of senders and a plurality of viewers, Quot; may mean a terminal of a sender for transmitting a broadcast and a terminal of a viewer for receiving a broadcast.
  • the first L4 switch 610 may be utilized for load balancing of a plurality of publishing point servers 710 included in the publishing point server pool 620, as shown in FIG. For example, the first L4 switch 610 may determine which of the plurality of publishing point servers 710 transmits the streaming data sent from the sender 540 to the publishing point server.
  • the publishing point server pool 620 is a pool of a plurality of publishing point servers 710, and each of the publishing point servers is connected to a sender (not shown) through the first L4 switch 610 140 and may transmit streaming data to an encoder server included in the encoder server pool 630.
  • one publishing point server can process a plurality of transmission requests.
  • one publishing point server may be implemented as one physical machine, but a plurality of publishing point servers may be implemented on one physical machine. For example, if three physical machines are each implemented to include three publishing point servers, a total of nine publishing point servers may be included in the publishing point server pool 620.
  • 3 shows an example in which the publishing point server pool 620 includes three publishing point servers, the publishing point server can be freely added to the publishing point server pool 620 or the publishing point server pool 620, .
  • the encoder server pool 630 may be a pool including a plurality of encoder servers 810 as shown in FIG. 8, the encoder server may be freely added to the encoder server pool 630 as needed or may be added to the encoder server pool 630 ).
  • each of the plurality of encoder servers 810 may be implemented as one physical machine as described above, but may be implemented to include a plurality of encoder servers on one physical machine. For example, if the three physical machines are each implemented to include four encoder servers, a total of twelve encoder servers may be included in the encoder server pool 620.
  • one physical machine may be implemented to include at least one publishing point server and at least one encoder server.
  • the publishing point server, the encoder server, and the proxy server which will be described later, may be implemented in the form of separate physical machines, or a plurality of servers may be included in one physical machine .
  • Each of the plurality of encoder servers 810 may be implemented as a pair of one encoder server and one uploader.
  • FIG. 8 shows an example in which one encoder server is implemented as a pair of encoder server 1 811 and uploader 1 812.
  • the encoder server may encode the streaming data received from the publishing point server into a predetermined profile. For example, when a live broadcast is provided to the viewer 550 using an HLS (HTTP Live Streaming) algorithm, the encoder server may encode the streaming data received from the publishing point server to generate a Transport Stream (TS) file have.
  • HLS HTTP Live Streaming
  • the uploader uploads TS files generated as a result of the encoding to the distributed file system 640 included in the live streaming farm 510 and the distributed file system 1020 included in the VOD farm 530 shown in FIG. can do.
  • the uploader stores reproduced file information (for example, information on how to play back some media and how to play back), and m3u8 files in HLS (HTTP Live Streaming) And upload it to the distributed file system 640 included in the live streaming farm 510.
  • reproduced file information for example, information on how to play back some media and how to play back
  • HLS HTTP Live Streaming
  • the playback file information according to the service type includes playback file information (for example, m3u8 file for time machine) for providing a time machine function, playback file information (for example, m3u8 file for live) and / (For example, m3u8 file for VOD).
  • playback file information for example, m3u8 file for time machine
  • playback file information for example, m3u8 file for live
  • / For example, m3u8 file for VOD
  • the reproduction file information for providing the time machine function may correspond to the accumulation reproduction file information for providing the delayed live broadcasting service.
  • the delayed live-stream playback file information can be generated and updated by extracting the file information from the accumulated playback file information after the start of the delayed live-streaming.
  • the distributed file system 640 may store and provide the encoded files (e.g., TS files) and playback file information (e. G., M3u8 files) to stream to the viewer 550.
  • encoded files e.g., TS files
  • playback file information e.g., M3u8 files
  • the proxy server pool 650 may include a plurality of proxy servers, and the proxy server selected through the second L4 switch 660 receives an external streaming request and delivers the streaming request to the distributed file system 640 can do.
  • the distributed file system 640 distributes the stored files (encoded files (e.g., TS files) and playback file information (e. G., M3u8 files)) ahead of the delivered external streaming request
  • a live broadcast service can be provided to the viewer 550.
  • the delayed live file reproduction file information may also be provided to viewers requesting a delayed live streaming service in a similar manner.
  • the coordinator 520 manages the statuses of servers included in the open-type live-broadcast platform 500, allocates an encoder server, and manages the overall status and settings of the open-live live-platform 500, .
  • the servers included in the open type live broadcast platform 500 can register themselves in the runtime coordinator 520, and the coordinator 520 can manage the registered servers.
  • the coordinator 520 may allocate an encoder server at the request of the publishing point server.
  • the coordinator 520 may be implemented using a Zookeeper system, which is a framework for providing auxiliary functions such as information sharing, lock, and events among nodes in a distributed environment.
  • the VOD palm 530 may generate and store a VOD file of a live video image and provide a VOD service. As shown in FIG. 9, a VOD generation pool 910, a distributed file system 920, A proxy server pool 930 and a third L4 switch 940. [
  • the VOD generation pool 910 can download the encoded files (for example, TS files) from the distributed file system 920 and generate a VOD file (for example, an MP4 file) when receiving the VOD file creation request have. In addition, the VOD generation pool 910 may upload the generated VOD file back to the distributed file system 920. [ The VOD generation pool 910 may include a plurality of VOD generation servers.
  • the distributed file system 920 may store and provide the encoded files for the VOD file and the VOD file generated by the VOD generation pool 910.
  • the proxy server pool 930 may include a plurality of proxy servers.
  • the third L4 switch 940 may select a proxy server among a plurality of proxy servers included in the proxy server pool 930 to deliver an external VOD file request,
  • the proxy server may forward an external VOD file request to the distributed file system 920.
  • the distributed file system 920 can externally provide the requested VOD file through the proxy server.
  • FIGS. 10 to 12 are views showing an example of a method of operating an open type live broadcasting platform according to an embodiment of the present invention.
  • FIG. 10 shows steps (1-1) to (1-6) of the entire processes (processes (1-1) to (1-10)) for live streaming.
  • the process (1-1) may be an example of a process in which the sender 540 transmits the streaming data to the first L4 switch 610.
  • step 1-2 the first L4 switch 610 selects any of the publishing point servers 1010 included in the publishing point server pool 620 and transmits the transmission request to the selected publishing point server 1010 It can be an example of a process.
  • the process (1-3) may be an example of a process in which the publishing point server 1010 requests the coordinator 520 to allocate any one of the encoder servers included in the encoder server pool 630 for streaming.
  • Processes 1-4 illustrate that the coordinator 520 selects any encoder server 1020 to be used for streaming in the encoder server pool 630 and sends information about the publishing point server 1010 along with the streaming start event to the selected encoder To the server 1020.
  • FIG. 1 illustrates that the coordinator 520 selects any encoder server 1020 to be used for streaming in the encoder server pool 630 and sends information about the publishing point server 1010 along with the streaming start event to the selected encoder To the server 1020.
  • the process 1-5 is an example of a process in which the encoder server 1020 selected by the coordinator 520 accesses the publishing point server 1010 to receive streaming data and encodes the received streaming data into a predetermined profile have.
  • the process 1-6 is a process of storing the encoded data (for example, the TS files generated according to the encoding) in a specified path (for example, the temporary storage 1030 in FIG. 10) Yes.
  • FIG. 11 shows steps (1-7) to (1-10) of the entire processes (processes (1-1) to (1-10)) for live streaming. Steps (1-6) and (1-7) may be connected through (A) shown in FIGS. 10 and 11.
  • the process 1-7 is a process in which the uploader 1110 acquires the encoded data (TS files) from the temporary storage 1030 shown in Fig. 10 and reproduces the reproduction file information corresponding to the encoded data (for example, m3u8 Files) in the file system.
  • the live playback file information for accumulation, the accumulation playback file information, and the delayed live-stream playback file information described above can be generated.
  • the uploader 1110 may pair with the encoder server 1020.
  • the uploader 1110 uploads the encoded data to the distributed file system 640 of the live streaming farm 510 and the distributed file system 920 of the VOD farm 530, respectively, And may be an example of a process of uploading the playback file information to the distributed file system 640 of the live streaming farm 510.
  • Such a process of uploading may be a process of updating / accumulating transmission segment files in the live playback file information, the accumulative playback file information, and the delayed live streaming playback file information according to each situation.
  • the process of uploading the encoded data to the distributed file system 920 of the VOD farm 530 may be connected through (C) shown in FIG. 11 and FIG.
  • the proxy server 1120 which is a selected one of the proxy servers included in the proxy server pool 650, transmits data encoded from the distributed file system 640 of the live streaming farm 510, And receiving the request.
  • the process (1-10) may be an example of the process of delivering the encoded data and the playback file information received by the proxy server 1120 to the viewer 550 and proceeding with the live streaming.
  • the viewer (550) receiving the live file reproduction file information can view the live broadcast of the sender (540), and the viewer (550) receiving the delay live live file information can watch the broadcast live .
  • FIG. 12 shows the entire processes (processes (2-1) to (2-5)) for generating a VOD file and providing a VOD service.
  • This Fig. 12 can be connected to Figs. 10 and 11 through (B) and (C).
  • the VOD generation server 1210 which is one of the VOD generation servers included in the VOD generation pool 910, may receive a VOD generation request from the coordinator 520.
  • the process (2-2) may be an example of a process in which the VOD generation server 1210 downloads encoded data to generate a VOD file from the distributed file system 920 included in the VOD farm 530.
  • the encoded data may be data stored in the distributed file system 920 by the uploader 1110 through the process (1-8) of FIG.
  • the process (2-3) may be an example of a process of generating a VOD file using the downloaded data by the VOD creation server 1210 and uploading it to the distributed file system 920.
  • the proxy server 1220 which is one of the proxy servers included in the proxy server pool 930, downloads the VOD file from the distributed file system 920 at the request of the VOD requester 1230 .
  • the process (2-5) may be an example of a process in which the proxy server 1220 provides the VOD file downloaded to the VOD requester 1230.
  • a VOD file for live streaming broadcasting can be generated and provided through the processes (2-1) to (2-5).
  • 5 to 12 is merely an example for implementing the delayed live streaming system according to an embodiment of the present invention, and the implementation of the delayed live streaming system is not limited to that of the open live streaming platform 500 The present invention is not limited thereto.
  • a delayed live broadcasting system and a delayed live streaming system capable of live broadcasting at a delayed time after a start time of a live broadcast, and a computer readable recording medium for causing the computer to execute the delayed live streaming method
  • a computer program stored in a recording medium and a recording medium thereof can be provided.
  • the system or apparatus described above may be implemented as a hardware component, or a combination of hardware components and software components.
  • the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA) , A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions.
  • the processing device may execute an operating system (OS) and one or more software applications running on the operating system.
  • the processing device may also access, store, manipulate, process, and generate data in response to execution of the software.
  • the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG.
  • the processing unit may comprise a plurality of processors or one processor and one controller.
  • Other processing configurations are also possible, such as a parallel processor.
  • the software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded.
  • the software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device As shown in FIG.
  • the software may be distributed over a networked computer system and stored or executed in a distributed manner.
  • the software and data may be stored on one or more computer readable recording media.
  • the method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium.
  • the computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination.
  • the medium may be one that continues to store computer executable programs, or temporarily store them for execution or download.
  • the medium may be a variety of recording means or storage means in the form of a combination of a single hardware or a plurality of hardware, and is not limited to a medium directly connected to a computer system, but may be dispersed on a network.
  • Examples of the medium include a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, an optical recording medium such as CD-ROM and DVD, a magneto-optical medium such as a floptical disk, And program instructions including ROM, RAM, flash memory, and the like.
  • a recording medium or a storage medium managed by a site or a server that supplies or distributes an application store or various other software to distribute the application may be mentioned.
  • Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

L'invention concerne un procédé et un système de diffusion en direct retardée. Selon des modes de réalisation de la présente invention, le procédé de diffusion en direct retardée peut comprendre les étapes consistant : à gérer un temps de début de diffusion en direct et un temps de début de diffusion en direct retardée d'une diffusion d'un émetteur ; à accumuler, dans des premières informations de fichier de lecture suivant l'ordre dans lequel des fichiers de segment de transmission sont générés, des informations de fichier destinées à indiquer des fichiers de segment de transmission générés par rapport aux fichiers de segment de transmission générés en codant des données de diffusion en continu transmises par un terminal de l'émetteur sur la base du temps de début de diffusion en direct ; à extraire, suivant l'ordre dans lequel les fichiers de segment de transmission sont générés, les informations de fichier accumulées dans les premières informations de fichier de lecture sur la base du temps de début de diffusion en direct retardée, de façon à ajouter les informations de fichier extraites à des secondes informations de fichier de lecture ; et à fournir un service de diffusion en direct retardée de la diffusion de l'émetteur au moyen des secondes informations de fichier de lecture, le temps de début de diffusion en direct retardée pouvant être préétabli comme un temps ultérieur au temps de début de diffusion en direct.
PCT/KR2018/015481 2017-12-07 2018-12-07 Procédé et système de diffusion en direct retardée WO2019112360A1 (fr)

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