WO2015192683A1 - Procédé de distribution de contenu, dispositif et système basé sur une technologie de transmission en continu adaptative - Google Patents

Procédé de distribution de contenu, dispositif et système basé sur une technologie de transmission en continu adaptative Download PDF

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Publication number
WO2015192683A1
WO2015192683A1 PCT/CN2015/076775 CN2015076775W WO2015192683A1 WO 2015192683 A1 WO2015192683 A1 WO 2015192683A1 CN 2015076775 W CN2015076775 W CN 2015076775W WO 2015192683 A1 WO2015192683 A1 WO 2015192683A1
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file
description file
content
playlist description
client
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PCT/CN2015/076775
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English (en)
Chinese (zh)
Inventor
贾记磊
黄永菁
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华为技术有限公司
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Publication of WO2015192683A1 publication Critical patent/WO2015192683A1/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
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
    • 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 present invention relates to the field of content distribution, and in particular, to a content distribution method, apparatus and system based on code stream adaptive technology.
  • HAS HTTP Adaptive Streaming
  • RTSP Real Time Streaming Protocol
  • RTP Real-time Transport Protocol
  • HTTP Hypertext Transfer Protocol
  • the general idea of HAS technology is to transcode video content into multiple code rate content, and then cut and slice the content of each code rate, each slice has the same duration, about 2-10 seconds.
  • the playlist description file is used to describe the code rate supported by the content and the playlist of the content of each bit rate.
  • the published content directory consists of three parts:
  • Media files content fragment files including multiple code rates
  • a playlist description file of each code rate content a media file slice list defining a specific code rate content
  • the main playlist description file define the code rate supported by the content, the playlist description file name corresponding to each code rate content, and the audio track, subtitle and other information.
  • the user When the client plays the content, the user first downloads the main playlist description file, obtains the code rate supported by the content, the playlist description file name of each content rate content, and the like, and then describes the file name according to the playlist of each code rate content. Download the first rate playlist description file, the client is based on the first The rate playlist description file requests content slices from the media server for playback. During the playback of the content, the client also downloads the playlist description file of other code rate content, and detects the network download bandwidth according to the download speed of the content slice in real time, and then dynamically requests the content of the code rate from the media server according to the network state. Fragmentation.
  • the first aspect provides a content distribution method based on a code stream adaptive technology, including: sending a playlist description file acquisition request to a streaming media server, where the acquisition request includes a compression identifier for indicating whether the client supports compressed transmission; Receiving, by the streaming media server, a first compressed file that includes a lowest code rate content playlist description file returned according to the compressed identifier; decompressing the first compressed file to obtain the lowest code rate content playlist description file; The lowest bit rate content playlist description file obtains content segments from the streaming server.
  • the obtaining, according to the lowest code rate content playlist description file, the content fragment from the streaming media server comprises: parsing the lowest bit rate content playlist description file to obtain the lowest bit rate content a playlist; obtaining a lowest code rate content slice from the streaming server according to the lowest bit rate content playlist.
  • the second aspect provides a client that supports the HAS technology, including: a sending unit, configured to send a playlist description file obtaining request to the streaming media server, where the obtaining request includes indicating whether the client supports compressed transmission.
  • a receiving unit configured to receive a first compressed file that includes a lowest code rate content playlist description file returned by the streaming media server according to the compressed identifier, and a processing unit, configured to decompress the first compressed file to obtain a minimum a content rate playlist description file;
  • the sending unit is further configured to: play the list description file according to the lowest bit rate content to the streaming media
  • the server sends a content fragmentation acquisition request; the receiving unit is further configured to receive the content fragment returned by the streaming media server.
  • the sending by the processing unit, the content rate playlist according to the lowest code rate content playlist description file to the streaming media server Describe a file to obtain a lowest bit rate content playlist; the sending unit sends a lowest bit rate content slice acquisition request to the media server according to the lowest content playlist.
  • the third aspect provides a streaming media server that supports the HAS, including: a receiving unit, configured to receive a playlist description file obtaining request sent by the client, where the obtaining request includes a compressed identifier for indicating whether the client supports compressed transmission a processing unit, configured to determine, according to the compression identifier, that the client supports compressed transmission; and a sending unit, configured to send, according to the determination result of the processing unit, the playlist file including the lowest code rate content playlist to the client The first compressed file.
  • the first compressed file sent by the sending unit further includes a primary playlist description file.
  • the streaming media server determines that the client supports the compressed transmission according to the compressed identifier
  • the compressed file of the playlist description file including the primary playlist description file and the lowest code rate media file is sent to the compressed file.
  • the client reduces the number of interactions between the client and the streaming server in the content buffering phase, improves the download speed, and compresses the playlist description file to reduce the amount of data downloaded by the client buffer, further improving the download speed and reducing the buffering time. Improve the user experience.
  • FIG. 1 is a schematic diagram of an application scenario architecture according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a content distribution method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flow chart of a content distribution method according to another embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a client according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a streaming media server according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a user terminal according to another embodiment of the present invention.
  • FIG. 1 is a schematic diagram of an application scenario architecture according to an embodiment of the invention.
  • the streaming media system based on the HAS technology includes: a streaming media management system 101, a content distribution system 102, and a client 103.
  • the streaming media management system 101 is responsible for digitally encoding, encapsulating, and publishing the input media stream.
  • the content distribution system 102 is composed of a plurality of standard web servers 1021 (also referred to as streaming media servers), and is responsible for accepting requests from clients and transmitting the content requested by the client to the client. It should be noted that for large-scale deployment of streaming media systems, edge networks or other content distribution networks may be used.
  • the client 103 is configured to retrieve content from the content distribution system 102 and reassemble the content for presentation to the user in the form of a continuous media stream.
  • the media management system 101 includes at least one media encoder 1011 and one media stream segmenter 1012.
  • the media encoder 1011 is configured to receive audio and video from an audio or video source device for encoding and encapsulation.
  • the encoding format should be one of the set of encodings supported by the client device, such as H.264 for video and HE-AAC for audio.
  • the encapsulation format may be an MPEG-2 Transport (TS) stream containing audio and video, or an audio-only MPEG elementary stream.
  • TS MPEG-2 Transport
  • the media encoder 1011 can transcode and package the same video content into a plurality of code rate media streams, so that the client dynamically selects content of different code rates according to the network status.
  • the media encoder 1011 publishes the packaged media stream to the media stream segmenter 1012.
  • the media stream segmenter 1012 reads the media stream from the media encoder 1011 and divides it into a series of media file fragments. The length of each segment of the media file is the same, about 2-10 seconds.
  • the media stream segmenter 1012 also creates an index file containing the reference information of each media file, and the index file is used to confirm the location of the media file fragment.
  • the index file is also referred to as a playlist description file, and includes a playlist description file for each code rate content, and a media file fragment column defining a specific code rate content. Table; a main playlist description file, which defines a playlist description file name corresponding to each code rate content, and information such as audio tracks and subtitles.
  • the content distribution system 102 can be a web server or a web caching system that publishes media files and index files based on the HTTP protocol.
  • the client 103 may be a smart terminal embedded with a player supporting the HTTP protocol, such as a smart phone, a tablet or a computer, or the client is a player supporting the HAS technology. It can be used to obtain an index file, and select a media stream according to the index file. For the selected media stream, the client 103 downloads each available media file fragment in order, and once sufficient data is downloaded, the client 103 starts to play back to the user. Combined media stream.
  • FIG. 2 is a schematic flow chart of a content distribution method according to an embodiment of the present invention, which may be performed by the streaming media system shown in FIG. 1.
  • the content distribution method includes:
  • the client sends a playlist description file obtaining request to the streaming media server, where the obtaining request includes a compressed identifier for indicating whether the client supports compressed transmission.
  • the client sends an HTTP GET message to the streaming server, that is, the WEB server in the content distribution system in FIG. 1, for requesting to obtain the playlist description file, and the HTTPGET message carries the indication that the client supports the support.
  • the client may be a player that supports the HAS technology, and the client supports the compressed transmission, indicating that the player supports decompressing the compressed content to obtain the original content.
  • the streaming media server returns a playlist description file of the compressed lowest bit rate content to the client according to the compressed identifier.
  • the streaming media server also returns the compressed main playlist description file to the client.
  • the streaming media server deploys a main playlist description file compression file, and a playlist description file compression file of each bit rate content.
  • the main playlist description file and the playlist description file of each code rate content may be separately released and released one by one.
  • the playlist description file of the main playlist description file and the lowest bit rate content may be combined into a first compressed file, and the playlist description files of other code rate contents are respectively compressed and deployed.
  • the main playlist description file may be separately compressed and released, and the playlist description files of each code rate content are combined and compressed and released.
  • the streaming media server After receiving the playlist description file acquisition request from the client, the streaming media server determines whether the client supports compressed transmission according to the compressed identifier that is used in the request to indicate whether the client supports compressed transmission. If the client supports compressed transmission, the client will support the compressed transmission. A compressed file of the playlist description file including the main playlist description file and the lowest bitrate content is returned to the client. Optionally, the compressed file including the primary playlist description file and the compressed playlist description file compressed file including the lowest bit rate media file may be separately and separately returned to the client.
  • the client decompresses the compressed file returned by the streaming media server, and obtains a playlist description file of the lowest bit rate content.
  • the client also decompresses the compressed file to obtain a main playlist description file.
  • the streaming media server returns the main playlist description file and the playlist description file of the lowest bit rate content in the same compressed file, decompress the compressed file and obtain the playlist of the main playlist description file and the lowest bit rate content. Description file.
  • the client decompresses the compressed file one by one to obtain the main playlist description file and the minimum respectively.
  • a playlist description file for the rate content If the streaming media server respectively returns a compressed file including the main playlist description file and a compressed file including the playlist description file of the lowest bit rate content, the client decompresses the compressed file one by one to obtain the main playlist description file and the minimum respectively.
  • a playlist description file for the rate content If the streaming media server respectively returns a compressed file including the main playlist description file and a compressed file including the playlist description file of the lowest bit rate content, the client decompresses the compressed file one by one to obtain the main playlist description file and the minimum respectively.
  • the client sends a lowest code rate content fragmentation acquisition request to the streaming media server according to the playlist description file of the lowest bit rate content, and obtains the lowest bit rate content fragmentation from the media server.
  • the client parses the playlist description file of the lowest bit rate media content to obtain a playlist of the lowest bit rate content, where the playlist includes a series of segment identifiers of the lowest bit rate content, such as a fragment URL, and the client segmentation
  • the slice URL obtains the selected content slice from the streaming server and plays it.
  • the client can download the playlist description file compression file of other code rate content from the streaming media server while playing the lowest bit rate content fragmentation, and the client can dynamically download the data according to the network, such as the network download speed.
  • Other rate content segments that match the client network condition are requested from the streaming server based on the playlist description file of the other code rate content.
  • the compressed file including the primary playlist description file and the playlist description file of the lowest bit rate content is sent to the client.
  • the number of interactions between the client and the streaming server in the content buffering stage is reduced, the download speed is improved, and the compressed playlist description file reduces the amount of data downloaded by the client buffer, further improving the download speed, reducing the buffering time, and improving the user.
  • the compressed playlist description file reduces the amount of data downloaded by the client buffer, further improving the download speed, reducing the buffering time, and improving the user.
  • HLS is an HTTP-based streaming media network transmission protocol proposed by Apple, which is an implementation scheme of HAS technology. It can realize live and on-demand streaming media, mainly used in iOS system, providing audio and video live broadcast and on-demand programs for iOS devices (such as iPhone and iPad).
  • the content of HLS includes the following parts:
  • the main playlist description file a text file with the extension m3u8, which defines the playlist description file name corresponding to each bit rate content, and information such as multiple audio tracks and subtitles.
  • a playlist description file of each code rate content a text file with an extension of m3u8, wherein a TS file list corresponding to the bit rate is defined, and when the client plays a content of a certain bit rate, the corresponding request is requested according to the file list order.
  • the TS file is played.
  • TS fragmentation TS fragment file including multiple code rates.
  • another embodiment of the present invention provides an HLS-based content distribution method, including: Two stages of content publishing and content playback.
  • Content publishing phase At the time of content distribution, the streaming media management system compresses the playlist description file, wherein the playlist description file of the main playlist description file and the lowest bitrate content can be compressed into one file, and other code rates.
  • the playlist description files of the content are compressed into a plurality of compressed files one by one.
  • Publish the above compressed file to the streaming server.
  • the following content list in the streaming media server includes the following playlist description files:
  • the compressed main playlist description file (the compressed play file includes a main playlist description file and a playlist description file of the lowest bit rate content);
  • a playlist description file (original file) of each code rate content
  • a playlist description file of each code rate content after compression (a playlist description file including a code rate content in each compressed file)
  • the content playback phase includes the following steps:
  • the client sends a primary playlist description file request to the streaming media server, where the request carries a compressed identifier indicating whether the client supports compressed transmission.
  • the client sends an HTTP GET message for requesting to obtain a playlist description file
  • the HTTP GET message carries a client capability field for indicating whether the client supports compressed transmission.
  • the client may be a player that supports the HLS protocol.
  • the streaming media server determines, according to the compressed identifier in the request message, whether the client supports compressed transmission.
  • the streaming media server After determining that the client supports the compressed transmission, the streaming media server returns the compressed playlist description file to the client.
  • the compressed playlist description file includes a main playlist description file and a playlist description file of the lowest bitrate content.
  • the client decompresses and parses the compressed primary playlist description file and the playlist description file of the lowest bitrate content returned by the streaming media server.
  • the client requests content fragmentation of the lowest bit rate content from the streaming media server.
  • the client After parsing the lowest bit rate playlist description file, the client obtains a playlist of the lowest bit rate content, where the playlist includes a series of fragment identifiers of the lowest bit rate content, such as a fragment URL, and the client is segmented according to the fragment.
  • the URL sends a content slice to the streaming server to obtain the selection.
  • the streaming media server returns the lowest bit rate content fragment to the client.
  • the client plays the received content fragment.
  • the client requests a playlist description file of other code rate content from the streaming media server.
  • the client sends a request for acquiring another content rate content playlist description file to the streaming media server while playing the lowest bit rate content fragment file.
  • the streaming media server returns a playlist description file of the compressed other code rate content to the client.
  • the client determines the network status according to the download speed of the content fragment, and dynamically switches the code rate.
  • the client can dynamically request other content rate content fragments matching the client network status according to the network downloading status, such as the network download speed, according to the playlist description file of the other code rate content.
  • the main playlist description file may be separately compressed, the playlist description files of each code rate content are compressed together, or the main playlist description file is separately compressed, and each The playlist description files of the code rate content are compressed separately.
  • the compressed file including the primary playlist description file and the playlist description file of the lowest bit rate content is sent to the client.
  • the number of interactions between the client and the streaming server in the content buffering stage is reduced, the download speed is improved, and the compressed playlist description file reduces the amount of data downloaded by the client buffer, further improving the download speed, reducing the buffering time, and improving the user.
  • the compressed playlist description file reduces the amount of data downloaded by the client buffer, further improving the download speed, reducing the buffering time, and improving the user.
  • the client includes:
  • the sending unit 401 is configured to send a playlist description file acquisition request to the streaming media server, where the obtaining request includes a compression identifier used to indicate whether the client supports compressed transmission;
  • the receiving unit 402 is configured to receive, by the streaming media server, the first compressed file that includes the lowest code rate playlist description file that is returned according to the compressed identifier;
  • the processing unit 403 is configured to decompress the first compressed file to obtain a lowest code rate playlist description file.
  • the sending unit 401 is further configured to send a content fragmentation acquisition request to the streaming media server according to the lowest code rate playlist description file; the receiving unit is further configured to receive the content content returned by the streaming media server sheet.
  • the client may be a user terminal that supports a HAS player, such as a smart phone, a tablet, or the like, or a player that supports HAS.
  • the sending unit 401 sends an HTTP request message to the streaming media server, where the HTTP request message is requested to obtain the primary playlist description file, where the HTTP request message carries the indication whether the client is Supporting a compressed identification of the compressed transmission, the streaming server determining, according to the compressed identifier, whether the client supports the compressed transmission, and when determining that the client supports the compressed transmission, sending the primary playlist description file and the lowest to the receiving unit 402 of the client The compressed file of the code rate content playlist description file.
  • the processing unit 403 decompresses the compressed file received by the receiving unit 402 to obtain a primary playlist description file and a lowest bit rate content playlist description file. At the same time, the processing unit 403 parses the lowest bit rate content playlist description file to obtain a playlist of the lowest bit rate content, the playlist containing a series of slice identifiers of the lowest bit rate content.
  • the processing unit 403 sends a content fragmentation acquisition request to the streaming media server according to the playlist instruction sending unit 404, where the content carries the content fragmentation identifier, and the streaming media server obtains the content fragmentation identifier in the content fragmentation request according to the received content. After the query obtains the fragment file corresponding to the content fragment identifier, it returns to the receiving unit 402 of the client, and the processing unit 403 parses the received content fragment for playing.
  • the processing unit 403 when parsing the received content fragment, the processing unit 403 further instructs the sending unit 401 to send another content rate content playlist description file acquisition request to the streaming media server, and the streaming media server displays the other content rate content playlist description file.
  • the processing unit 403 parses the other code rate content playlist description file received by the receiving unit 402, and obtains other code rate content.
  • the playlist determines the network status according to the download speed of the content slice, and dynamically specifies the sending unit 401 to send a code rate content fragmentation request suitable for the current network state to the media server according to the network condition.
  • the method includes: a receiving unit 501, configured to receive a playlist description file obtaining request sent by a client, where the obtaining request includes a processing unit 502, configured to determine, according to the compressed identifier, that the client supports compressed transmission, and a sending unit 503, configured to: according to the judgment result of the processing unit, The client sends the first compressed file including the lowest bit rate playlist description file.
  • the receiving unit 501 further receives a content fragmentation request sent by the client, where the content fragmentation request carries the content fragmentation identifier, and the processing unit 502 obtains, according to the content fragmentation identifier, the content fragment identifier corresponding to the content fragmentation identifier.
  • the instruction sending unit 503 sends the content slice to the client for playing.
  • the receiving unit 501 further receives another content rate content playlist description file acquisition request sent by the client, and the processing unit 502 instructs the sending unit 503 to send the compressed file of the other code rate content playlist description file to the client, so as to facilitate the client.
  • the processing unit 502 instructs the sending unit 503 to send the compressed file of the other code rate content playlist description file to the client, so as to facilitate the client.
  • content fragments of different code rates adapted to the network state are dynamically obtained from the streaming media server.
  • the streaming media server may be a web server that supports the HTTP protocol.
  • the streaming media server may adopt a module design as shown in FIG. 6.
  • the streaming media server and the client when the client requests the playlist description file from the streaming media server, carries the compressed identifier indicating whether the client supports the compressed transmission, and the streaming media server determines that the client supports the compressed transmission according to the compressed identifier. Transmitting the compressed file including the main playlist description file and the playlist description file of the lowest bit rate content to the client, reducing the number of interactions between the client and the streaming server in the content buffering stage, improving the download speed, and compressing the playback
  • the list description file reduces the amount of data downloaded by the client buffer, further improving the download speed, reducing the buffer time, and improving the user experience.
  • FIG. 6 is a schematic block diagram of a user terminal according to an embodiment of the present invention.
  • the user terminal includes: at least one processor 601, such as a CPU, at least A communication interface 604 or other communication interface, memory 602, and at least one communication bus 605 are used to enable session communication between these devices.
  • the processor 601 is configured to execute an executable module, such as a computer program, stored in the memory.
  • the user terminal optionally also includes a user interface 603 including, but not limited to, a display, a keyboard, and a pointing device (eg, a mouse, a trackball, a touchpad, or a tactile display).
  • the memory 602 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
  • the communication session between the user terminal and at least one other computer is implemented by at least one network interface (which may be wired or wireless), and an Internet, a wide area network, a local network, a metropolitan area network, etc. may be used.
  • the communication interface 604 is configured to send a playlist description file acquisition request to the streaming media server, where the acquisition request includes a compression identifier used to indicate whether the client supports compressed transmission, and is further configured to receive the flow.
  • the media server returns a first compressed file including the lowest code rate playlist description file according to the compressed identifier
  • the memory 602 is configured to store the communication interface 604 to receive the first compressed file
  • the processor 601 is configured to use the first compressed file from the memory 602. Compressing the file and decompressing the first compressed file to obtain a lowest bit rate playlist description file.
  • the processor 601 parses the lowest bit rate content playlist description file to obtain a playlist of the lowest bit rate content, and the playlist includes a series of slice identifiers of the lowest bit rate content.
  • the processor 601 instructs the communication interface 604 to send a content fragmentation acquisition request to the streaming media server according to the playlist instruction.
  • the request carries the content fragmentation identifier, and the streaming media server obtains the content fragmentation identifier in the request according to the received content fragmentation.
  • the query returns to the communication interface 604 of the client, and the processor 601 parses the received content fragment to call the player to play.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

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Abstract

Des modes de réalisation de la présente invention concernent un procédé de distribution de contenu, qui comprend les étapes suivantes : envoyer une demande d'acquisition de fichier de description de liste de lecture à un serveur de diffusion multimédia en continu, la demande d'acquisition comprenant un identificateur de compression utilisé pour indiquer si un client prend en charge la transmission par compression ; recevoir un premier fichier compressé qui comprend un fichier de description de liste de lecture de contenu à débit de code minimum qui est renvoyé par le serveur de diffusion multimédia en continu en fonction de l'identificateur de compression ; décompresser le premier fichier compressé et obtenir le fichier de description de liste de lecture de contenu à débit de code minimum ; et acquérir des fragments de contenu à partir du serveur de diffusion multimédia en continu en fonction du fichier de description de liste de lecture de contenu à débit de code minimum. Dans le procédé de distribution de contenu, lorsque le serveur de diffusion multimédia en continu détermine en fonction de l'identificateur de compression que le client prend en charge la transmission par compression, le fichier compressé comprenant un fichier de description de liste de lecture principal et le fichier de description de liste de lecture de contenu à débit de code minimum est envoyé au client, le nombre d'interactions du client et du serveur de diffusion multimédia en continu à l'étape de mise en mémoire tampon du contenu est réduit, et la vitesse de téléchargement est augmentée.
PCT/CN2015/076775 2014-06-18 2015-04-16 Procédé de distribution de contenu, dispositif et système basé sur une technologie de transmission en continu adaptative WO2015192683A1 (fr)

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CN114651449A (zh) * 2020-04-26 2022-06-21 华为技术有限公司 一种流媒体参数动态自适应网络的调整方法及装置

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