CN103748888A - Stream media service sending method, playing method, and apparatus - Google Patents

Stream media service sending method, playing method, and apparatus Download PDF

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Publication number
CN103748888A
CN103748888A CN201280035484.2A CN201280035484A CN103748888A CN 103748888 A CN103748888 A CN 103748888A CN 201280035484 A CN201280035484 A CN 201280035484A CN 103748888 A CN103748888 A CN 103748888A
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China
Prior art keywords
mpd file
client
server
interface channel
media service
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Granted
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CN201280035484.2A
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Chinese (zh)
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CN103748888B (en
Inventor
余芳
韦安妮
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of CN103748888A publication Critical patent/CN103748888A/en
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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
    • H04N21/25—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
    • H04N21/26258—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 generating a list of items to be played back in a given order, e.g. playlist, or scheduling item distribution according to such list
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/612—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/75—Media network packet handling
    • H04L65/764—Media network packet handling at the destination 
    • 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
    • H04N21/26291—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 providing content or additional data updates, e.g. updating software modules, stored at the client
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand

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

Abstract

A stream media service sending method, playing method, and apparatus. The sending method comprises: receiving a request of obtaining a first media presentation description (MPD) file, the request being sent by a client; sending a response comprising the first MPD file to the client; and when the first MPD file is updated, sending a second MPD file to the client, the second MPD file comprising: the updated MPD file or updating information of the first MPD file, so that the client replaces or updates the first MPD file in time. Embodiments of the present invention solve the technical problem that the client plays the stream media service unsmoothly and transmits the MPD file repeatedly because the client cannot update the MPD file in synchronization with the server.

Description

Stream media service sending method, playing method, and apparatus
A kind of sending method of streaming media service, player method and device
The present invention relates to streaming media transmission technique field, more particularly to a kind of sending method of streaming media service, player method and device for technical field.Background technology is with the development of streaming media transmission technique, existing media presentation description（MPD, Media Presentation Description) the more new technological process of file mainly includes：
First, client obtains MPD Uniform Resource Identifier by out-band method（URL, Uniform Resource Locator, i.e. network address）；Secondly, user end to server sends the request for obtaining and updating MPD file；The server will be sent to client including the response for updating MPD file.
Wherein, server is sent appropriate when to ensure that MPD updates request, and ensure the uniformity and validity that are updated in server and client side both sides MPD, update MPD file to sending and define a series of parameter and constraints in prior art specification.Such as, MPD file for having got new version such as i+1 versions on server, when the restrictive condition when MPD file of regulation i versions fails, and client send MPD and update request, and i versions the restrictive condition that when fails of MPD file etc..
That is, the MPD file of the renewal received can not timely be sent to client by server, the MPD file only updated after the request of client is received could be sent；Certainly, the MPD file that client can also be updated by the condition of setting to server acquisition request, i.e. server and client side are required to the parameter or trigger condition according to setting and the MPD file of renewal are obtained by Request and Response patterns.
Therefore, in the research and practice process to prior art, the inventors found that, in existing implementation, the MPD file for being possible to server has been updated over, but it is due to that client does not possess time or condition that acquisition request updates MPD also, causes client not in time, to influence follow-up client to the request of media slicing and the broadcasting of media content to MPD renewal.Or, the request that client updates according to the trigger condition triggering of setting to MPD, and the MPD of server is likely to not update, so as to cause server that the recent MPD file sent is sent into client, the repetition of MPD file is caused to transmit.The content of the invention
The embodiment of the present invention provides the update method and device of a kind of streaming media service, to solve client in the prior art MPD file, the technical problem for causing client terminal playing media business to have some setbacks can not be updated with server sync, and repeats to transmit the technical problem of MPD file.
To solve the above problems, the embodiment of the present invention provides a kind of sending method of streaming media service, methods described includes:Receive the request for acquisition the first media presentation description MPD file that client is sent；
Response including first MPD file is sent to the client；
When first MPD file updates, the second MPD file is sent to the client, second MPD file includes：The fresh information of the MPD file of renewal or first MPD file, in order to which first MPD file is replaced or updated to client in time.
Optionally, when receiving before client sends the request for obtaining the first media presentation description MPD file or asking, methods described also includes：The interface channel of transmission stream media service is set up with the client, wherein, the streaming media service includes the first MPD file or the second MPD file.
Optionally, it is described receive client send obtain the first media presentation description MPD file request be：Receive client and send the request for obtaining the first MPD file first.
Optionally, the interface channel is that the server based on the 5th edition HTML HTML5 sends event Server-sent-event event, stream event stream interface channels.
Optionally, described set up with the client includes for transmitting the interface channel of MPD file：Receive the request that client sends the interface channel for setting up transmission stream media service；The response for the interface channel for agreeing to set up transmission stream media service is sent to the client；Or
Receiving client and sending also includes the solicited message for setting up the interface channel of transmission stream media service in the request for obtaining the first MPD file；Also include the response message for agreeing to set up the interface channel of transmission stream media service in response of the client terminal including the first MPD file is sent to.
Optionally, if when receiving the request of client transmission the first media presentation description MPD file of acquisition, the interface channel for transmission stream media service is set up with the client；
It is described the response including first MPD file is sent to the client to be：Response including first MPD file is sent to by the client by the interface channel；
It is described to be to the second MPD file of client transmission：Second MPD file is sent to the client by the interface channel.
Optionally, if before the request of client transmission the first media presentation description MPD file of acquisition is received, the interface channel for transmission stream media service is set up with the client；
It is described receive client send obtain the first media presentation description MPD file request be：The request that client sends the first MPD file of acquisition is received by the interface channel of foundation； It is described the response including first MPD file is sent to the client to be：Response including first MPD file is sent to by the client by the interface channel of foundation；
It is described to be to the second MPD file of client transmission：Second MPD file is sent to the client by the interface channel of foundation.
Optionally, methods described also includes：
After first MPD file or the second MPD file is sent, the interface channel that transmission stream media service is set up with the client is disconnected.
Optionally, after the interface channel with the client is disconnected, methods described also includes：When setting up connection request of client initiation is being received, the interface channel of transmission stream media service is set up with the client again.
The embodiment of the present invention also provides a kind of player method of streaming media service, and methods described includes：
After server the first media presentation description MPD file of transmission is received, the second media presentation description MPD file of server transmission is received, wherein, second MPD file includes：The fresh information of MPD file or first MPD file after renewal；
The first MPD file is replaced using the MPD file after the renewal, or the first MPD file, the MPD file after being updated are updated using the fresh information of first MPD file；
Fragment request is constructed according to the MPD file after the renewal；
Burst content corresponding with the fragment request is obtained from the server；
Play the burst content.
Optionally, before server transmission first MPD file is received, methods described also includes：The request for obtaining first MPD file is sent to server；
Receive the server transmission includes the response of first MPD file.
Optionally, before the request for obtaining first MPD file is sent to the server or when asking, methods described also includes：The interface channel for transmission stream media service is set up with the server, the streaming media service includes the first MPD file or the second MPD file.
Optionally, described sent to server obtains the request of first MPD file and is：Send the request for obtaining first MPD file first to server.
Optionally, the interface channel set up with server for transmission stream media service, including：After the request for obtaining the first MPD file is sent to server, the request of the interface channel for setting up transmission stream media service is sent to server；Receive the response that the server sends the interface channel for agreeing to set up transmission stream media service；Or
Also include the connection for setting up transmission stream media service in the request for obtaining the first MPD file is sent to server The solicited message of passage；Receive the response message for also including agreeing to set up the interface channel of transmission stream media service in the response including MPD file that the server is sent.
Optionally, methods described also includes：
After first MPD file or the second MPD file of server transmission is received, the state of the interface channel of transmission stream media service is set up in detection with the server.
Optionally, if the state for detecting the interface channel for setting up transmission stream media service with the server is when disconnecting, methods described also includes：The interface channel of transmission stream media service is set up in initiation with server again.
Optionally, the interface channel is that the server based on the 5th edition HTML HTML5 sends event Server-sent-event event, stream event stream interface channels.
Optionally, methods described also includes：A flow of event event stream interface channel is opened by creating the event source Event Source objects based on HTML5.
Optionally, when creating the Event Source objects based on HTML5, the object receives the uniform resource position mark URL of the first MPD files or the second MPD file, is used as the parameter of its constructed fuction.
Optionally, methods described also includes：Client distinguishes the corresponding MPD file of different media contents according to different Event Source objects.
Accordingly, the present invention also provides a kind of dispensing device of streaming media service, including：
First receiving unit, the request of the first media presentation description MPD file of acquisition is sent for receiving client；First transmitting element, for the response including first MPD file to be sent into the client；Second transmitting element, for when first MPD file updates, the second MPD file is sent to the client, second MPD file is the MPD file updated or the fresh information of first MPD file, in order to which first MPD file is replaced or updated to client in time.
Optionally, described device also includes：
First sets up unit, for before the request for the MPD file of acquisition first that client transmission is received in first receiving unit or when asking, the interface channel of transmission stream media service is set up with the client, wherein, the streaming media service includes the first MPD file or the second MPD file.
Optionally, first receiving unit, the request specifically for receiving acquisition the first media presentation description MPD file that client is sent first.
Optionally, described device also includes：
Control unit, for after the first transmitting element or the second transmitting element send first MPD file or the second MPD file, disconnecting the interface channel that transmission stream media service is set up with the client.
Optionally, described device also includes： Second sets up unit, for after described control unit disconnects the interface channel with the client, receiving when setting up connection request of client initiation, setting up the interface channel of transmission stream media service with the client again.
The embodiment of the present invention also provides a kind of playing device of streaming media service, including：
First receiving unit, for after server the first media presentation description MPD file of transmission is received, receive the second media presentation description MPD file of server transmission, wherein, second MPD file is the MPD file or the fresh information of first MPD file after updating；
Updating block, for replacing the first MPD file using the MPD file after the renewal；Or update the first MPD file, the MPD file after being updated using the fresh information of the first MPD；
Structural unit, for constructing fragment request according to the MPD file after the renewal；
Acquiring unit, for obtaining burst content corresponding with the fragment request from the server；Broadcast unit, for playing the burst content.
Optionally, before first receiving unit receives server transmission second MPD file, described device also includes：
First transmitting element, the request of first MPD file is obtained for being sent to server；
Second receiving unit, includes the response of first MPD file for receive that the server sends.Optionally, described device also includes：
First sets up unit, during for sending before the request for obtaining first MPD file or ask to the server in the first transmitting element, the interface channel for transmission stream media service is set up with the server, the streaming media service includes the first MPD file or the second MPD file.
Optionally, described device also includes：
Detection unit, for after first receiving unit receives first MPD file or the second MPD file of server transmission, the state of the interface channel for transmission stream media service of unit foundation to be set up in detection described first.
Optionally, described device also includes：
Second sets up unit, when being in disconnection for detecting the state for the interface channel for transmission stream media service that unit foundation is set up in detection described first in the detection unit, sets up the interface channel for transmission stream media service with server again.
As shown from the above technical solution, in the present embodiment, after the first MPD file is sent to client by server, if detecting or inquiring the first MPD file to change, the second MPD file after change is actively then sent to client, or client is given in the update section distribution by the second MPD file with respect to the first MPD file, in order to which client upgrades in time, and can smoothly play media business.So as to ensure and MPD file on server Uniformity and validity.Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of flow chart of the sending method of streaming media service provided in an embodiment of the present invention；
Fig. 2 is the flow chart of the player method of provided in an embodiment of the present invention-kind of streaming media service；
Fig. 3 is the structural representation of the dispensing device of provided in an embodiment of the present invention-middle streaming media service；Fig. 4 is the second structural representation of the dispensing device of provided in an embodiment of the present invention-kind of streaming media service；Fig. 5 is the 3rd structural representation of the dispensing device of provided in an embodiment of the present invention-kind of streaming media service；Fig. 6 is the 4th structural representation of the dispensing device of provided in an embodiment of the present invention-kind of streaming media service；Fig. 7 is the structural representation of the playing device of provided in an embodiment of the present invention-middle streaming media service；Fig. 8 is the second structural representation of the playing device of provided in an embodiment of the present invention-kind of streaming media service；Fig. 9 is the 3rd structural representation of the playing device of provided in an embodiment of the present invention-kind of streaming media service；Figure 10 is a kind of 4th structural representation of the playing device of streaming media service provided in an embodiment of the present invention；Figure 11 is a kind of flow of the application example of the video broadcasting method of media business provided in an embodiment of the present invention
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.Fig. 1 is referred to for a kind of flow chart of the sending method of streaming media service provided in an embodiment of the present invention；Methods described includes：Step 101:Receive the media presentation description of acquisition first that client is sent（MPD, Media Presentation Description) file request；
In this embodiment, MPD is the description to a media rendering element, main to include to content fragment, ask Ask the description of construction, multi code Rate of Chinese character etc..MPD file is the document of an xml form, 3G (Third Generation) Moblie partnership projects（3GPP, 3rd Generation Partnership Project) the client metadata that is included with MPD file construct the URL of suitable HTTP（HTTP-URL, Hypertext Transfer Protocol- Uniform Resource Locator), and then burst content is obtained, and provide clients with streaming media service.For MPD definition, the explanation in 3GPP TS 26.247 is specifically may be referred to, be will not be repeated here.
Wherein, the client can be HTTP stream client（HTTP Streaming Client) or other clients with HTTP.
Step 102:Response including first MPD file is sent to the client；
In the step, server, such as, and HTTP streaming server（HTTP Steaming Server), prepare server receiving content（Content Preparation Server) push MPD file after, if receive client send obtain MPD file（That is the first MPD file）Request, then the MPD file is sent to the client.
Step 103:When first MPD file updates, the second MPD file is sent to the client, second MPD file includes：The fresh information of the MPD file of renewal or the first MPD, in order to which first MPD file is replaced or updated to client in time.Wherein, it can also include in second MPD file to the updated configured information of the first MPD file.
In the step, when server is detected or inquired the first MPD file updates described in database or content server when, the second MPD file of renewal is actively sent to the client, in order to which first MPD file is updated or replaced with the second MPD file by client in time.It is detected or the mode of inquiry can be real-time, can also regularly, and the present embodiment is not restricted.
In this embodiment, after the first MPD file is sent to client by server, if detecting or inquiring the first MPD file to change, the second MPD file after change is actively then sent to client, in order to which client upgrades in time, and media business can be smoothly played, so as to ensure the uniformity and validity with MPD file on server.
Optionally, in the embodiment of the present invention, when receiving before client sends the request for obtaining the first media presentation description MPD file or asking, methods described can also include：Server sets up the interface channel of transmission stream media service with the client, wherein, the streaming media service includes the first MPD file or the second MPD file.Specifically include：
One kind sets up mode：Server receives the request that client sends the interface channel for setting up transmission stream media service；Server sends the response for the interface channel for agreeing to set up transmission stream media service to the client.
Another way is：Server receives client and sent also to be included building in the request for obtaining the first MPD file The solicited message of the interface channel of vertical transmission stream media service；Server also includes the response message for agreeing to set up the interface channel of transmission stream media service in response of the client terminal including the first MPD file is sent to.
Wherein, the interface channel is the flow of event that the server based on the 5th edition HTML HTML5 sends event (Server-sent-event)（Event stream) interface channel.Certainly, this is also not limited to, other similar interface channels are can also be.
It is optional, if when receiving the request of client transmission the first media presentation description MPD file of acquisition, the interface channel for transmission stream media service is set up with the client；Then in the above-described embodiments, it is described the response including the first MPD files is sent to the client to be：Response including first MPD file is sent to by the client by the interface channel；It is described to be to the second MPD file of client transmission：Second MPD file is sent to the client by the interface channel.
If before the request of client transmission the first media presentation description MPD file of acquisition is received, the interface channel for transmission stream media service is set up with the client；Then in the above-described embodiments, it is described receive client send obtain the first media presentation description MPD file request be：The request that client sends the first MPD file of acquisition is received by the interface channel of foundation；It is described the response including first MPD file is sent to the client to be：Response including first MPD file is sent to by the client by the interface channel of foundation；It is described to be to the second MPD file of client transmission：2nd MPD files are sent to the client by the interface channel of foundation.
In the above-described embodiments, methods described can also include：After first MPD file or the 2nd MPD files is sent, server disconnects or keeps the interface channel with the client.
Wherein, if server disconnects the interface channel with the client, methods described can also include：Again the interface channel for transmission stream media service is set up with the client；Specifically include：Server receives the request that the client sends the interface channel for setting up streaming media service again；Server sends the response for the interface channel for agreeing to set up transmission stream media service to the client again.Wherein, the interface channel is the flow of event that the server based on the 5th edition HTML HTML5 sends event (Server-sent-event)（Event stream) interface channel.
Wherein, the event stream interface channels of the Server-sent-event under normal circumstances will not the actively disconnection of being serviced device.
In the embodiment of the present invention, server once detects MPD renewal, just actively by the MPD file after renewal or including being sent to client relative to the part fresh information that last time MPD is changed, in order to which client upgrades in time local MPD, so as to ensure server and the uniformity and validity of MPD file in client.
Also referring to Fig. 2, being a kind of flow chart of the player method of streaming media service provided in an embodiment of the present invention, institute The method of stating includes：
Step 201:After server the first media presentation description MPD file of transmission is received, the second media presentation description MPD file of server transmission is received, wherein, second MPD file includes：The fresh information of MPD files or the first MPD after renewal；
Step 202:The first MPD file is replaced using the MPD file after the renewal, or utilizes described first
MPD fresh information updates the first MPD file, the MPD file after being updated；
Step 203:Fragment request is constructed according to the MPD file after the renewal；
Step 204:Burst content corresponding with the fragment request is obtained from the server；
Step 205:Play the burst content.
In this embodiment, the second MPD file that client need not update to server acquisition request, but server is sent to the MPD files of client with before and has renewal detecting or inquire, actively by the MPD file after renewal, or the fresh information transmission client of MPD file has been sent before.
Optionally, before server transmission first MPD file is received, methods described can also include：User end to server sends the request for obtaining first MPD file；What the client reception server was sent includes the response of first MPD file.
Optionally, before the request for obtaining first MPD file is sent to the server or when asking, methods described can also include：Client sets up the interface channel for transmission stream media service with the server, and the streaming media service includes the first MPD file or the second MPD file.
Wherein, client is set up with the server and can included for the interface channel of transmission stream media service：A kind of mode is client when sending the request for obtaining the first MPD file first to server, and the interface channel of transmission stream media service is set up with server；Specifically include：Also include the solicited message for setting up the interface channel of transmission stream media service in the request of the MPD file of acquisition first sent to server；Receive the response message for also including agreeing to set up the interface channel of transmission stream media service in the response including MPD file that the server is sent.
Another to be, client sends the request of the interface channel for setting up transmission stream media service to server after the request for obtaining the first MPD file is sent to server；Client receives the response that the server sends the interface channel for agreeing to set up transmission stream media service.
Optionally, described sent to server obtains the request of first MPD file and is：Send the request for obtaining first MPD file first to server.
Optionally, methods described can also include：Client is after first MPD file or the second MPD file of server transmission is received, and the state of the interface channel of transmission stream media service is set up in detection with the server.
Optionally, methods described can also include：Detecting company that transmission stream media service is set up with the server When connecing channel status for disconnection, the interface channel of transmission stream media service is set up with client again；Specifically include：When the interface channel that transmission stream media service is set up with the server disconnects, the request of the interface channel for setting up transmission stream media service is sent again to the server immediately；The reception server sends the response for the interface channel for agreeing to set up transmission stream media service again.
Optionally, the interface channel in the present embodiment is based on the 5th edition HTML（HTML5 server) sends event（Server-sent-event flow of event)（Event stream) interface channel.Client is by creating the event source based on HTML5（Event Source) object opens an event stream interface channel.When creating the Event Source objects based on HTML5, the object receives the URL of first MPD file or the second MPD file, is used as the parameter of its constructed fuction.Client distinguishes the corresponding MPD file of different media contents according to different Event Source objects.
In the embodiment of the present invention, client can be set up a proprietary HTTP between server and be connected in acquisition request MPD file first（It is not limited to this）, the renewal transmission for carrying out MPD is set up using the connection.Compared with prior art, the behavior that client carries out the MPD of verification renewal need not be constrained between server and client side as in the prior art, setting multiple parameters.That is, in the embodiment of the present invention, when server detects or inquires new MPD, with regard to the client that is sent to of active, client updates local MPD files after receiving, to ensure uniformity and validity with MPD file in server.
Implementation process based on the above method, the embodiment of the present invention also provides a kind of dispensing device of streaming media service, and its structural representation is as shown in figure 3, described device includes：First receiving unit 31, the first transmitting element 32 and the second transmitting element 33, wherein, first receiving unit 31 sends the request of the first media presentation description MPD file of acquisition for receiving client；First transmitting element 32, for the response including first MPD file to be sent into the client；Second transmitting element 33, for when first MPD file updates, the second MPD file is sent to the client, second MPD file is the MPD file updated or the fresh information of the first MPD, in order to which first MPD file is replaced or updated to client in time.
Wherein, the first receiving unit 31 receives client and sends the request for obtaining the first MPD file, and client can be made to send the request for obtaining the first MPD file first.
Optionally, described device can also include：First sets up unit 41, for before the request for the MPD file of acquisition first that client transmission is received in first receiving unit 31 or when asking, the interface channel of transmission stream media service is set up with the client, wherein, the streaming media service includes the first MPD file or the 2nd MPD files.Wherein, the process for setting up the interface channel of transmission stream media service specifically refers to above-mentioned, will not be repeated here.Its corresponding structural representation is as shown in figure 4, Fig. 4 is a kind of second structural representation of the dispensing device of streaming media service provided in an embodiment of the present invention. Optionally, described device can also include：Control unit 52, for after the first transmitting element 31 or the second transmitting element 32 send first MPD file or the second MPD file, disconnecting the interface channel that transmission stream media service is set up with the client.Its corresponding structural representation is as shown in figure 5, Fig. 5 is a kind of 3rd structural representation of the dispensing device of streaming media service provided in an embodiment of the present invention.
Optionally, described device can also include：Second sets up unit 61, for described control unit 51 disconnect with the client set up the interface channel of transmission stream media service when or after, receiving when setting up connection request of client initiation, the interface channel of transmission stream media service is set up with the client again, is specifically included：Receive the request that the client sends the interface channel for setting up streaming media service again；And send the response for the interface channel for agreeing to set up transmission stream media service again to the client.Its corresponding structural representation is as shown in Fig. 6, and Fig. 6 is a kind of 4th structural representation of the dispensing device of streaming media service provided in an embodiment of the present invention.
The function of unit and the implementation process of effect, refer to corresponding implementation process in the above method, will not be repeated here in described device.
Accordingly, the embodiment of the present invention also provides a kind of playing device of streaming media service, and its structural representation is as shown in Fig. 7, and described device includes：First receiving unit 71, updating block 72, structural unit 73, acquiring unit 74 and broadcast unit 75, wherein, first receiving unit 71, for after server the first media presentation description MPD file of transmission is received, the second media presentation description MPD file that the reception server is sent, wherein, second MPD file is the MPD file or the fresh information of first MPD file after updating；The updating block 72, for replacing the first MPD file using the MPD file after the renewal；Or update the first MPD file, the MPD file after being updated using the fresh information of the first MPD；The structural unit 73, for constructing fragment request according to the MPD file after the renewal；The acquiring unit 74, for obtaining burst content corresponding with the fragment request from the server；The broadcast unit 75, for playing the burst content.
Optionally, before the first receiving unit 71 receives server transmission second MPD file, described device can also include：First transmitting element 81 and the second receiving unit 82, first transmitting element 81 obtain the request of first MPD file for being sent to server；Second receiving unit 82, includes the response of first MPD file for receive that the server sends.Its corresponding structural representation is as shown in figure 8, Fig. 8 is a kind of second structural representation of the dispensing device of streaming media service provided in an embodiment of the present invention.
Optionally, described device can also include：First sets up unit 91, during for sending before the request for obtaining first MPD file or ask to the server in the first transmitting element 81, the interface channel for transmission stream media service is set up with the server, the streaming media service includes the first MPD file or the second MPD file.Its corresponding structural representation is as shown in figure 9, Fig. 9 is a kind of transmission of streaming media service provided in an embodiment of the present invention 3rd structural representation of device.
Optionally, described device can also include：Detection unit 10, for being received in first receiving unit after the 2nd MPD files and/or the second receiving unit that the server sends receive the first MPD file that the server is sent, the state of the interface channel for transmission stream media service of the foundation of unit 91 is set up in detection described first.
Described device can also include：Second sets up unit 11, for after the detection unit 10 detects that the described first interface channel for transmission stream media service for setting up the foundation of unit 91 disconnects, set up with server the interface channel for transmission stream media service again immediately, its detailed process set up includes：Send the request of the interface channel for setting up transmission stream media service again to the server immediately；And the reception server sends the response for the interface channel for agreeing to set up transmission stream media service again.As shown in Figure 10, Figure 10 is a kind of 4th structural representation of the dispensing device of streaming media service provided in an embodiment of the present invention to its corresponding structural representation.
The function of unit and the implementation process of effect, refer to corresponding implementation process in the above method, will not be repeated here in described device.
For the ease of the understanding of those skilled in the art, illustrated below with specific application example.
Also refer to Figure 11, for a kind of flow chart of the application example of the video broadcasting method of media business provided in an embodiment of the present invention, the embodiment is exemplified by applied to 3GPP Adaptive HTTP Streaming systems, and the network element being related within the system includes：Content source（Content Source) network element, content prepare（Content Preparation) network element, HTTP streaming servers（HTTP Streaming Server, abbreviation HTTP server）Standing grain P HTTP flow client（HTTP Streaming Client, referred to as, HTTP clients）, detailed process includes：
Step 110:The media content that content source network element will need HTTP to flow client terminal playing is sent to content preparation network element；
Step 111:Content prepares network element and the media content received is divided into media content fragmenting, and generation MPD;
It is responsible for carrying out media slicing to the media content that reception is obtained that is, content prepares network element, and media slicing content is packaged into satisfactory form（Such as the file fragmentation of 3GP forms）, then, corresponding media presentation description MPD file is generated for each media slicing.
Step 112:Content prepares network element and sends the content fragment and MPD file（Or push）Give HTTP streaming servers；The content fragment and MPD file received in order to HTTP streaming server storages；
Step 113:HTTP stream clients get the URL of MPD file by out-band method;
Step 114:HTTP flows client and sets up transmission stream media service with the HTTP streaming servers（That is MPD files）Interface channel；Wherein, the streaming media service includes the MPD file transmitted first, or update MPD file etc..
It should be noted that, the present invention is to flow client to before HTTP streaming servers first acquisition request MPD files with HTTP, is set up exemplified by interface channel, but be not limited to this, such as, the interface channel of transmission media business can also be set up in acquisition request MPD files first.
Wherein, in the present embodiment, the interface channel is that the server based on the 5th edition HTML HTML5 sends event Server-sent-event flow of event event stream interface channels, but is not limited to this.
Step 115:HTTP flows client to the corresponding HTTP streaming servers acquisition request MPD files of URL（That is the first MPD file）.
Certainly, in this embodiment, can also be in acquisition request MPD file（That is the first MPD file）Before, the interface channel of transmission stream media service is set up in request with the HTTP streaming servers；The present embodiment before asking MPD files exemplified by setting up interface channel.
Step 116:The MPD file of storage is sent to the HTTP clients by HTTP streaming servers；Step 117:HTTP stream clients are generated according to the MPD file（Construction）Fragment request；Step 118：The burst content of fragment request described in HTTP stream clients to HTTP streaming server acquisition requests；Step 119:HTTP streaming servers flow the burst content that client sends the fragment request to the HTTP；Step 120:The burst content that HTTP stream client terminal playings are received；
Step 121:The MPD file of renewal is sent to content and prepares network element by content source network element；
Step 122:Content prepares network element and the MPD file of the renewal received is published on the HTTP streaming servers；
Wherein, the MPD file of the renewal is MPD file or the fresh information of the first MPD after updating etc.；
Step 123:The MPD file of the renewal received is actively sent to HTTP stream clients by HTTP streaming servers；
Wherein, HTTP streaming servers can also in real time or periodically inquire about database or content prepares network element or content server etc., if inquiring MPD file to update, i.e., flow the MPD file that client sends renewal, i.e. the second MPD file to the HTTP.
Step 124:HTTP flows client and generates fragment request according to the MPD file of the renewal；And the corresponding burst content of the fragment request is obtained from HTTP servers, then play the burst content.Repeat step 117 step 120.
Afterwards, can be actively by renewal when HTTP streaming servers are receiving or detected the MPD file of renewal
MPD file is sent to HTTP stream clients, and the implementation procedure of HTTP stream clients is as described above, herein not Repeat again.
That is, in the present embodiment, HTTP flows client before acquisition request MPD file first, the proprietary HTTP first set up between one and HTTP streaming servers is connected, and the transmission of MPD file or the MPD file of renewal is carried out using the connection, and, HTTP streaming servers detect have been issued to HTTP stream client MPD file change when, the MPD file of renewal is actively sent to HTTP stream clients in time, in order to which HTTP stream clients upgrade in time local MPD file, so as to ensure the uniformity and validity of HTTP stream clients and MPD file on HTTP streaming servers.
The present embodiment is so that the push based on HTML5 is realized as an example.Wherein, HTML5 SSE (Server-Sent Events) are a HTML5 technologies, have standardized server push functions, Server-Sent Events specifications define API to open a HTTP HTTP connection, and the notice from HTTP server push can be obtained by the connection.Here is that client request sets up in the HTTP GET message example that an event stream is opened in the connection based on SSE, the message examples three kinds of MIME type text/ event- stream application/3 gpp-dahs+xml application/3 gpp-dahsdelta for designating client support with server
+xml.Specifically include：
GET /Events HTTP/1.1
Host: myServer:8875
User- Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de-DE)
AppleWebKit/532+ (KHTML, like Gecko) Version/4.0.4
Safari/531.21.10
Accept-Encoding: gzip, deflate
Referer: http://myServer:8875/
Accept: text/ event-stream ; application/3gpp-dahs+xml; application/3gpp- dahsdelta+xml;
Last-Event-Id: 6
Accept-Language: de-DE
Cache-Control: no-cache
Connection: keep-alive
That is, the program segment description, the HTTP servers are received after HTTP requests, following response message are replied.Response message includes the response to event stream events, and data fields indicate that this is the related information of a MPD file, and have attached the related information of MPD files.Wherein SomeRandomString is used for distinguishing two kinds of different data types. HTTP/1.1 200 OK
Server: xLightweb/2.12-HTML5Preview6
Content-Type: multipart/mixed;； boundary ="SomeRandomString"
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Connection: close
-SomeRandomString
Content-type: text/ event- stream
： for MPD stream
retry: 5000
id: 7
data: This is a MPD data.
—SomeRandomString
Content-type: application/3 gpp-ahs+xml
This part is MPD DATA
—SomeRandomString
That is, after HTTP clients receive the response, parsing data division, MPD file fresh information is obtained.
Afterwards, the MPD file of renewal is actively issued HTTP clients by HTTP server when inquiring MPD file and updating.
Interaction i.e. between HTTP server and HTTP clients is first asked similar to client, server response, then the form of active response again.
In another embodiment, it is also based on exemplified by long polling push realizations, Long polling technologies are also based on HTTP, the embodiment requires that client and server all supports long polling characteristics, and its process is：
After connection is set up between client and Server, client sends a request to Server, Server can be always maintained at this link, while inquiry database or content server repeatedly, once Server has inquired renewal or has had data to send to client, just recover response, client is sent it to, connection afterwards is disconnected, then, client can re-establish connection, and initiate new request a to Server.
Client not repetitive requests can so be ensured, server does not repeat to send. But, in actual application, in some implementations, the connection between client and Server can also not turned off, and be always maintained at.But the acquisition that data update also is built upon on the basis of resquest and response pairs.
In another embodiment, it is also based on the realization for having HAP scene in HTML5, that is to say, that there is HTTP Proxy entities in network, the entity possesses the function of acting on behalf of server, it is necessary to be modified to the MPD file from Server.
Under this scene, a connection for being used to transmitting and updating MPD file can be set up between HTTP Proxy and HTTP Client.Client receives the MPD file fresh information from server and proxy simultaneously, and local MPD file is replaced or updated to the fresh information that client is received according to last time.
In the embodiment of the present invention, the promptness that MPD file updates not only is ensure that, the repetition transmission of MPD information is it also avoid, and avoids safeguarding the complexity that MPD normally updates.
It should be noted that, herein, such as first and second or the like relational terms are used merely to make a distinction an entity or operation with another entity or operation, and not necessarily require or imply between these entities or operation there is any this actual relation or order.And, term " including ", " including " or any other variant thereof is intended to cover non-exclusive inclusion, so that process, method, article or equipment including a series of key elements not only include those key elements, but also other key elements including being not expressly set out, or also include for this process, method, article or the intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence " including one ... ", it is not excluded that also there is other identical element in the process including the key element, method, article or equipment.Through the above description of the embodiments, those skilled in the art can be understood that the present invention can add the mode of required general hardware platform to realize by software, can certainly the former be more preferably embodiment by hardware, but in many cases.Understood based on such, the part that technical scheme substantially contributes to prior art in other words can be embodied in the form of software product, the computer software product can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are to cause a computer equipment（Can be personal computer, server, or network equipment etc.）Perform the method described in some parts of each embodiment of the invention or embodiment.Described above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.

Claims (1)

  1. Claim
    1st, a kind of sending method of streaming media service, it is characterised in that including：
    Receive the request for acquisition the first media presentation description MPD file that client is sent；
    Response including first MPD file is sent to the client；
    When first MPD file updates, the second MPD file is sent to the client, second MPD file includes：The fresh information of the MPD file of renewal or first MPD file, in order to which first MPD file is replaced or updated to client in time.
    2nd, according to the method described in claim 1, it is characterised in that when receiving before client sends the request for obtaining the first media presentation description MPD file or asking, methods described also includes：The interface channel of transmission stream media service is set up with the client, wherein, the streaming media service includes the first MPD file or the second MPD file.
    3rd, method according to claim 1 or 2, it is characterised in that it is described receive client send obtain the first media presentation description MPD files request be：Receive client and send the request for obtaining the first MPD file first.
    4th, according to the method in claim 2 or 3, it is characterised in that the interface channel is the flow of event event stream interface channels that the server based on the 5th edition HTML HTML5 sends event Server-sent-event.
    5th, method according to claim 2, it is characterised in that described set up with the client includes for transmitting the interface channel of MPD file：
    Receive the request that client sends the interface channel for setting up transmission stream media service；The response for the interface channel for agreeing to set up transmission stream media service is sent to the client；Or
    Receiving client and sending also includes the solicited message for setting up the interface channel of transmission stream media service in the request for obtaining the first MPD file；Also include the response message for agreeing to set up the interface channel of transmission stream media service in response of the client terminal including the first MPD file is sent to.
    6th, method according to claim 2, it is characterised in that if when receiving the request of client transmission the first media presentation description MPD file of acquisition, the interface channel for transmission stream media service is set up with the client； It is described the response including first MPD file is sent to the client to be：Response including first MPD file is sent to by the client by the interface channel；
    It is described to be to the second MPD file of client transmission：Second MPD file is sent to the client by the interface channel.
    7th, method according to claim 2, it is characterised in that if before the request of client transmission the first media presentation description MPD file of acquisition is received, the interface channel for transmission stream media service is set up with the client；
    It is described receive client send obtain the first media presentation description MPD file request be：The request that client sends the first MPD file of acquisition is received by the interface channel of foundation；
    It is described the response including first MPD file is sent to the client to be：Response including first MPD file is sent to by the client by the interface channel of foundation；
    It is described to be to the second MPD file of client transmission：Second MPD file is sent to the client by the interface channel of foundation.
    8th, the method according to any one of claim 2 to 7, it is characterised in that also include：After first MPD file or the second MPD file is sent, the interface channel that transmission stream media service is set up with the client is disconnected.
    9th, method according to claim 8, it is characterised in that after the interface channel with the client is disconnected, methods described also includes：When setting up connection request of client initiation is being received, the interface channel of transmission stream media service is set up with the client again.
    10th, a kind of player method of streaming media service, it is characterised in that including：
    After server the first media presentation description MPD file of transmission is received, the second media presentation description MPD file of server transmission is received, wherein, second MPD file includes：The fresh information of MPD files or first MPD file after renewal；
    The first MPD file is replaced using the MPD file after the renewal, or the first MPD file, the MPD file after being updated are updated using the fresh information of first MPD file；
    Fragment request is constructed according to the MPD file after the renewal；
    Burst content corresponding with the fragment request is obtained from the server；
    Play the burst content. 11st, method according to claim 10, it is characterised in that before server transmission first MPD file is received, methods described also includes：
    The request for obtaining first MPD file is sent to server；
    Receive the server transmission includes the response of first MPD file.
    12nd, method according to claim 11, it is characterised in that before the request for obtaining first MPD file is sent to the server or when asking, methods described also includes：The interface channel for transmission stream media service is set up with the server, the streaming media service includes the first MPD files or the second MPD file.
    13rd, the method according to claim 11 or 12, it is characterised in that described sent to server obtains the request of first MPD file and be：Send the request for obtaining first MPD file first to server.
    14th, method according to claim 12, it is characterised in that the interface channel set up with server for transmission stream media service, including：
    After the request for obtaining the first MPD file is sent to server, the request of the interface channel for setting up transmission stream media service is sent to server；Receive the response that the server sends the interface channel for agreeing to set up transmission stream media service；Or
    Also include the solicited message for setting up the interface channel of transmission stream media service in the request for obtaining the first MPD file is sent to server；Receive the response message for also including agreeing to set up the interface channel of transmission stream media service in the response including MPD file that the server is sent.
    15th, method according to claim 12, it is characterised in that also include：
    After first MPD file or the second MPD file of server transmission is received, the state of the interface channel of transmission stream media service is set up in detection with the server.
    16th, method according to claim 15, it is characterised in that if the state for detecting the interface channel for setting up transmission stream media service with the server is when disconnecting, methods described also includes：The interface channel of transmission stream media service is set up in initiation with server again.
    17th, the method according to any one of claim 10 to 16, it is characterised in that the interface channel is the thing that the server based on the 5th edition HTML HTML5 sends event Server-sent-event Part stream svsnt stream interface channels.
    18th, the method according to claim 17, it is characterised in that also include：A flow of event event stream interface channel is opened by creating the event source Event Source objects based on HTML5.
    19th, method according to claim 18, it is characterized in that, when creating the Event Source objects based on HTML5, the object receives the uniform resource position mark URL of first MPD file or the second MPD file, is used as the parameter of its constructed fuction.
    20th, method according to claim 19, it is characterised in that also include：Client distinguishes the corresponding MPD file of different media contents according to different Event Source objects.
    21st, a kind of dispensing device of streaming media service, it is characterised in that including：
    First receiving unit, the request of the first media presentation description MPD file of acquisition is sent for receiving client；
    First transmitting element, for the response including first MPD file to be sent into the client；Second transmitting element, for when first MPD file updates, the second MPD file is sent to the client, second MPD file is the MPD file updated or the fresh information of first MPD file, in order to which first MPD file is replaced or updated to client in time.
    22nd, device according to claim 21, it is characterised in that also include：
    First sets up unit, for before the request for the MPD file of acquisition first that client transmission is received in first receiving unit or when asking, the interface channel of transmission stream media service is set up with the client, wherein, the streaming media service includes the first MPD file or the second MPD file.
    23rd, the device according to claim 21 or 22, it is characterised in that first receiving unit, the request specifically for receiving acquisition the first media presentation description MPD file that client is sent first.
    24th, the device according to any one of claim 21 to 23, it is characterised in that also include：Control unit, for after the first transmitting element or the second transmitting element send first MPD file or the second MPD file, disconnecting the interface channel that transmission stream media service is set up with the client.
    25th, device according to claim 24, it is characterised in that also include： Second sets up unit, for after described control unit disconnects the interface channel with the client, receiving when setting up connection request of client initiation, setting up the interface channel of transmission stream media service with the client again.
    26th, a kind of playing device of streaming media service, it is characterised in that including：
    First receiving unit, for after server the first media presentation description MPD file of transmission is received, the second media presentation description MPD file of server transmission is received, wherein, second MPD file is the MPD file or the fresh information of first MPD file after updating；
    Updating block, for replacing the first MPD file using the MPD file after the renewal；Or update the first MPD file, the MPD file after being updated using the fresh information of the first MPD；Structural unit, for constructing fragment request according to the MPD file after the renewal；
    Acquiring unit, for obtaining burst content corresponding with the fragment request from the server；Broadcast unit, for playing the burst content.
    27th, device according to claim 26, it is characterised in that before first receiving unit receives server transmission second MPD file, described device also includes：
    First transmitting element, the request of first MPD file is obtained for being sent to server；Second receiving unit, includes the response of first MPD file for receive that the server sends.
    28th, device according to claim 27, it is characterised in that also include：
    First sets up unit, during for sending before the request for obtaining the first MPD files or ask to the server in the first transmitting element, the interface channel for transmission stream media service is set up with the server, the streaming media service includes the first MPD file or the second MPD file.
    29th, device according to claim 28, it is characterised in that also include：
    Detection unit, for after first receiving unit receives first MPD file or the second MPD file of server transmission, the state of the interface channel for transmission stream media service of unit foundation to be set up in detection described first.
    30th, device according to claim 29, it is characterised in that also include：
    Second sets up unit, when being in disconnection for detecting the state for the interface channel for transmission stream media service that unit foundation is set up in detection described first in the detection unit, sets up the interface channel for transmission stream media service with server again.
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