CN101237340A - System and method for realizing multicast channel in multimedia service - Google Patents
System and method for realizing multicast channel in multimedia service Download PDFInfo
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Abstract
The invention discloses a system for realizing a multicast channel in multimedia service. The system comprises a medium service server and user terminal equipment, wherein the medium service server which is used to store the multicast address information of a multicast channel provides the multicast address information of the multicast channel for user terminal equipment when receiving a service request of the multicast channel sent by the user terminal equipment; the user terminal equipment, which is used to send the service request of the multicast channel to the medium service server, receives the multicast address information of the multicast channel returned from the medium service server and then adds the information in a multicast group to acquire the code stream of the multicast channel. The invention also discloses a method used to realize a multicast channel in multimedia service. The system and the method can reduce the delay time of the video picture of the multicast channel and increase channel switching speed, thereby greatly improving user experience.
Description
Technical field
The present invention relates to multimedia service fields such as Web TV (IPTV), mobile TV, mobile flow medium, relate in particular to a kind of system and method for realizing that multicast channel is realized in the multi-media service system.
Background technology
The raising of the network bandwidth and development of internet technology provide possibility for carry out multi-media value-added business on existing network.Stream media technology provide a kind of in network the mode of media contents such as transmission of video, audio frequency, picture, therefore at multi-media service system, particularly obtained in the IPTV multimedia service using widely.In present multi-media service system, the channel live business that adopts multicast to realize has obtained using widely.But following method is adopted in the realization of multicast channel at present usually:
Subscriber terminal equipment sends the cannel broadcast request to Media Distribution Module (perhaps agent equipment etc.), Media Distribution Module returns the address of an available streaming media server to user terminal apparatus, subscriber terminal equipment and stream media equipment are set up real time streaming transport protocol (RTSP)/RTCP Real-time Transport Control Protocol (RTCP)/real-time transport protocol (rtp) session then, by Session Description Protocol (SDP) media negotiation, obtain the multicast address of channel, subscriber terminal equipment adds multicast address, the multicast code stream of beginning receiving channels, subscriber terminal equipment carries out suitable decoding and processing to code stream after receiving code stream, is illustrated as the video pictures of multicast.
The problem that this method exists is: user terminal apparatus begins to the beginning receiving media code stream from sending playing request, need through many steps, therefore the retardation ratio of the video pictures of multicast channel appearance is bigger, and user experience is poor when carrying out the channel switching.
Summary of the invention
Consider the problems referred to above and make the present invention that for this reason, main purpose of the present invention is, a kind of system and method that is used for realizing the multimedia service multicast channel is provided.
According to the system that is used for realizing the multimedia service multicast channel of the present invention, comprise: the media business server, be used to preserve the multicast address information of multicast channel, and when receiving the service request of the multicast channel that sends by subscriber terminal equipment, provide the multicast address information of multicast channel for subscriber terminal equipment; And subscriber terminal equipment, be used for sending the multicast channel service request to the media business server, after the multicast address information that receives the multicast channel that the media business server returns, add multicast group, obtain the code stream of multicast channel.
In addition, in this system, also comprise: the channel multicast source, be used for media content is encoded into the code stream that can transmit, and outwards send the code stream of multicast channel with multicast mode, and after subscriber terminal equipment added multicast address, the code stream that multicast channel is provided was to subscriber terminal equipment.
In addition, in this system, also comprise: streaming media server, be used to store the code stream of multicast channel, and at subscriber terminal equipment when it sends the request of multicast channel code stream, the code stream of multicast channel is provided.
In addition, in this system, when the media business server also is used for the service request of the multicast channel that sends at subscriber terminal equipment, feed back at least one streaming media server address information simultaneously.
In addition, in this system, streaming media server also is used for setting up the session control link of multicast channel code stream when receiving the media play request of subscriber terminal equipment transmission, so that subscriber terminal equipment to be provided the code stream of multicast channel is carried out time shift and media session control ability.
In addition, in this system, the media business server also is used to receive the performance information that at least one streaming media server reports, and when receiving the multicast channel service request of subscriber terminal equipment transmission, according to the load balancing of at least one streaming media server, feed back at least one available streaming media server address information and give subscriber terminal equipment.
In addition, in this system, the coded format of the code stream of multicast channel be following at least one: H264, MPEG-4 and 3GP; The host-host protocol of the code stream of multicast channel comprises RTP at least; The communication protocol of utilizing between subscriber terminal equipment and the streaming media server be following at least one: real time streaming transport protocol and RTCP Real-time Transport Control Protocol; And the communication protocol of utilizing between subscriber terminal equipment and the media business server is hypertext output protocol or session initiation protocol.
In addition, in this system, the media business server also is used in the multicast address information of preserving multicast channel, set up the corresponding relation between multicast channel sign and the multicast address information, and when the multicast channel service request of the sign that comprises multicast channel that receives the subscriber terminal equipment transmission, search multicast address information according to the multicast channel sign.
According to the method that is used for realizing the multimedia service multicast channel of the present invention, may further comprise the steps: the multicast address information of multicast channel is stored in the media business server; When receiving the service request of the multicast channel that sends by subscriber terminal equipment, provide the multicast address information of multicast channel for subscriber terminal equipment; And, subscriber terminal equipment is added multicast group, to obtain the code stream of multicast channel according to the multicast address information of multicast channel.
In addition, in the method, when receiving the service request of the multicast channel that sends by subscriber terminal equipment, also provide the address information of available streaming media server for subscriber terminal equipment.
In addition, in the method, also comprise: according to the address information of available streaming media server, send media play request to streaming media server, control link with the media session of setting up the multicast channel code stream, thereby provide subscriber terminal equipment that the code stream of multicast channel is carried out time shift and media session control ability.
In addition, in the method, subscriber equipment is handled code stream with the display video picture after the code stream of receiving group channel, and wherein, this processing includes but not limited to decoding processing.
In addition, in the method, the media service request of multicast channel comprises the sign of multicast channel, and the media business server is searched the multicast address information of multicast channel according to the sign of multicast channel.
By above-mentioned aspect of the present invention, in the multi-media service system that adopts the present invention to make up, subscriber terminal equipment, through being redirected get access to the multicast address information of multicast channel after, multicast address information according to multicast channel adds multicast group immediately, and the code stream of beginning receiving group channel, do not need to wait for that user terminal apparatus and streaming media server set up complete medium control session link, therefore user terminal apparatus can be faster cushions and handles the multicast code stream of multicast channel, thereby reduced the user and waited for the time that the channel picture occurs, improve the speed that channel switches, to improve user experience greatly.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 shows the structural representation of system that is used for realizing the multimedia service multicast channel according to the embodiment of the invention;
Fig. 2 shows the critical workflow figure of method that is used for realizing the multimedia service multicast channel according to the embodiment of the invention;
Fig. 3 shows the Organization Chart of realizing according to the multicast channel of the embodiment of the invention; And
Fig. 4 shows the detail flowchart of realizing according to the multicast channel of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Fig. 1 shows the structural representation of system that is used for realizing the multimedia service multicast channel according to the embodiment of the invention.
As shown in Figure 1, comprising: media business server 102, the multicast address information that is used to preserve multicast channel, and when receiving the service request of the multicast channel that sends by subscriber terminal equipment, provide the multicast address information of multicast channel for subscriber terminal equipment; And subscriber terminal equipment 104, be used for sending the multicast channel service request to the media business server, after the multicast address information that receives the multicast channel that the media business server returns, add multicast group, obtain the code stream of multicast channel.
In addition, in this system, also comprise: the channel multicast source, be used for media content is encoded into the code stream that can transmit, and outwards send the code stream of multicast channel with multicast mode, and after subscriber terminal equipment added multicast address, the code stream that multicast channel is provided was to subscriber terminal equipment.
In addition, in this system, also comprise: streaming media server, be used to store the code stream of multicast channel, and at subscriber terminal equipment when it sends the request of multicast channel code stream, the code stream of multicast channel is provided.
In addition, in this system, when the media business server also is used for the service request of the multicast channel that sends at subscriber terminal equipment, feed back at least one streaming media server address information simultaneously.
In addition, in this system, streaming media server also is used for setting up the session control link of multicast channel code stream when receiving the media play request of subscriber terminal equipment transmission, so that subscriber terminal equipment to be provided the code stream of multicast channel is carried out time shift and media session control ability.
In addition, in this system, the media business server also is used to receive the performance information that at least one streaming media server reports, and when receiving the multicast channel service request of subscriber terminal equipment transmission, according to the load balancing of at least one streaming media server, feed back at least one available streaming media server address information and give subscriber terminal equipment.
In addition, in this system, the coded format of the code stream of multicast channel be following at least one: H264, MPEG-4 and 3GP; The host-host protocol of the code stream of multicast channel comprises RTP at least; The communication protocol of utilizing between subscriber terminal equipment and the streaming media server be following at least one: real time streaming transport protocol and RTCP Real-time Transport Control Protocol; And the communication protocol of utilizing between subscriber terminal equipment and the media business server is hypertext output protocol or session initiation protocol.
In addition, in this system, the media business server also is used in the multicast address information of preserving multicast channel, set up the corresponding relation between multicast channel sign and the multicast address information, and when the multicast channel service request of the sign that comprises multicast channel that receives the subscriber terminal equipment transmission, search multicast address information according to the multicast channel sign.
Fig. 2 shows the critical workflow figure of method that is used for realizing the multimedia service multicast channel according to the embodiment of the invention.
As shown in Figure 2, may further comprise the steps: step S202 is stored in the multicast address information of multicast channel in the media business server; Step S204 when receiving the service request of the multicast channel that is sent by subscriber terminal equipment, provides the multicast address information of multicast channel for subscriber terminal equipment; And step S206, the multicast address information according to multicast channel adds multicast group with subscriber terminal equipment, to obtain the code stream of multicast channel.
In addition, in the method, when receiving the service request of the multicast channel that sends by subscriber terminal equipment, also provide the address information of available streaming media server for subscriber terminal equipment.
In addition, in the method, also comprise: according to the address information of available streaming media server, send media play request to streaming media server, control link with the media session of setting up the multicast channel code stream, thereby provide subscriber terminal equipment that the code stream of multicast channel is carried out time shift and media session control ability.
In addition, in the method, subscriber equipment is handled code stream with the display video picture after the code stream of receiving group channel, and wherein, this processing includes but not limited to decoding processing.
In addition, in the method, the media service request of multicast channel comprises the sign of multicast channel, and the media business server is searched the multicast address information of multicast channel according to the sign of multicast channel.
Fig. 3 shows the Organization Chart of realizing according to the multicast channel of the embodiment of the invention.
As shown in Figure 3, realize the system of multicast channel in the multi-media service system, comprise that the channel multicast source (is designated MS among the figure, MultiCast Source), the media business server (is expressed as MSS among the figure, Media Service Server), streaming media server (is designated SS1, SS2 among the figure ... SSn, SS is Stream Server), subscriber terminal equipment (being designated UE among the figure, User Equipment).
Fig. 4 shows the detail flowchart of realizing according to the multicast channel of the embodiment of the invention.
As shown in Figure 4, the method for multicast channel may further comprise the steps in the realization multi-media service system:
Step S402, channel multicast source MS is according to the multicast address information of multicast channel, the multicast address information format is＜MultiCastIp 〉:＜MultiCastPort 〉: wherein＜and MultiCastIp〉be multicast IP (procotol) address, wherein＜and MultiCastPort〉be multicast port, the channel multicast source adds multicast group, and the channel multicast source begins to send in the mode of RTP the code stream of multicast channel in multicast group, and the coded format of code stream includes but not limited to H264, MPEG-4,3GP etc.;
Step S404, subscriber terminal equipment UE is to the media service request of media business server MSS transmission to multicast channel, request message format meets the RTSP consensus standard, RTSPURL is rtsp: //＜MssSvrIp 〉:＜MssSvrPort 〉/＜ChannelID〉.sdp..., wherein＜and MssSvrIp〉be the IP address of media business server MSS,＜MssSvrPort〉be the RTSP serve port of media business server MSS;＜ChannelID〉be the sign of multicast channel;
Step S406, media business server MSS is according to the sign＜ChannelID of multicast channel 〉, the multicast address information＜MultiCastIp of channel 〉:＜MultiCastPort 〉, and the address information that can use streaming media server returns to subscriber terminal equipment by the RTSP response, response format is the responses of RTSP 300 classes, wherein, redirect location information field form is rtsp: //＜SsnSvrIp 〉:＜SsnSvrPort 〉/＜ChannelID〉.sdp? MultiCast=＜MultiCastIp 〉:＜MultiCastPort 〉, wherein＜and SsnSvrIp〉be the IP address information of one of them stream media server S Sn, SsnSvrPort is the RTSP port information of stream media server S Sn,＜MultiCastIp〉and＜MultiCastPort〉be respectively multicast ip address and the multicast port of channel multicast source MS;
Step S408, after subscriber terminal equipment UE is received the media services response for multicast channel of media business server, from response, obtain the multicast address information＜MultiCastIp of multicast channel 〉:＜MultiCastPort 〉, and the address information＜SsnSvrIp of streaming media server 〉:＜SsnSvrPort 〉, carry out following operating procedure S408-1 and step S408-2 concomitantly:
Step S408-1: subscriber terminal equipment UE is according to the multicast address information＜MultiCastIp of multicast channel 〉:＜MultiCastPort〉the adding multicast group, the RTP message of the multicast channel that beginning receiving channels multicast source MS sends behind the adding multicast group, and from the RTP message, resolve the code stream of channel, decode according to the coded format of channel simultaneously, and decoded reduction of data is become video pictures;
Step S408-2: subscriber terminal equipment UE is according to address information＜SsnSvrIp of stream media server S Sn 〉:＜SsnSvrPort 〉, initiate RTSP SETUP and RTSP PLAY (media service request) request to stream media server S Sn, set up RTSP/RTCP (RTCP Real-time Transport Control Protocol)/RTP (RTP) session.
Subscriber terminal equipment UE is set up and the Streaming Media of Streaming Media SSn is controlled after the session, and subscriber terminal equipment can be controlled session by Streaming Media, carries out the control operation of code stream.
Difference with the prior art of the present invention is that the multicast address information of channel is kept in the media business server, and existing method is to be kept on the streaming media server; Subscriber terminal equipment is by sending the address information that media service request is obtained multicast channel to the media business server, existing method is, subscriber terminal equipment just obtains the multicast address information of multicast channel by after streaming media server is consulted through SDP (Session Description Protocol); The code stream of the preferential receiving group channel of subscriber terminal equipment, and then set up Streaming Media control session, existing method is that subscriber terminal equipment is set up Streaming Media control session earlier, adds the multicast group of channel multicast source then, begins to receive code stream.
Can make following improvement to the present invention, to increase its practicality: among the present invention, the RTSP agreement of communicating by letter and having adopted standard between subscriber terminal equipment and the streaming media service server, in actual use, communication protocol between subscriber terminal equipment and media business server and the streaming media server is HTTP (HTML (Hypertext Markup Language)) also, SIP transmission control protocols such as (session initiation protocols).
What specify is that the system and method that multicast channel disclosed by the invention is realized can be extended to other business fields based on Streaming Media, also can adopt method of the present invention that better multimedia service is provided.
In sum,, can reduce the time of delay of the video pictures appearance of multicast channel, improve the channel switch speed, to improve user experience greatly by the present invention.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. system that is used for realizing the multimedia service multicast channel comprises:
The media business server, the multicast address information that is used to preserve multicast channel, and when receiving the service request of the described multicast channel that sends by subscriber terminal equipment, provide the multicast address information of described multicast channel for described subscriber terminal equipment; And
Described subscriber terminal equipment, be used for sending described multicast channel service request to described media business server, after the multicast address information that receives the described multicast channel that described media business server returns, add multicast group, obtain the code stream of described multicast channel.
2. system according to claim 1 is characterized in that, also comprises:
The channel multicast source, be used for media content is encoded into the code stream that can transmit, and with the outside code stream that sends described multicast channel of multicast mode, and after described subscriber terminal equipment added described multicast address, the code stream that described multicast channel is provided was to described subscriber terminal equipment.
3. system according to claim 1 and 2 is characterized in that, also comprises:
Streaming media server; Be used to store the code stream of described multicast channel, and at described subscriber terminal equipment when it sends the request of multicast channel code stream, the code stream of described multicast channel is provided.
4. system according to claim 3 is characterized in that, when described media business server also is used for the service request of the described multicast channel that sends at described subscriber terminal equipment, feeds back at least one streaming media server address information simultaneously.
5. system according to claim 4, it is characterized in that, described streaming media server also is used for when receiving the media play request of described subscriber terminal equipment transmission, set up the session control link of described multicast channel code stream, the code stream of described multicast channel is carried out time shift and media session control ability so that described subscriber terminal equipment to be provided.
6. system according to claim 5, it is characterized in that, described media business server also is used to receive the performance information that at least one described streaming media server reports, and when the described multicast channel service request that receives that described subscriber terminal equipment sends, according to the load balancing of at least one described streaming media server, feed back at least one available streaming media server address information and give described subscriber terminal equipment.
7. require 6 described systems according to claim, it is characterized in that, the coded format of the code stream of described multicast channel be following at least one: H264, MPEG-4 and 3GP; The host-host protocol of the code stream of described multicast channel comprises RTP at least; The communication protocol of utilizing between described subscriber terminal equipment and the described streaming media server be following at least one: real time streaming transport protocol and RTCP Real-time Transport Control Protocol; And the communication protocol of utilizing between described subscriber terminal equipment and the described media business server is hypertext output protocol or session initiation protocol.
8. system according to claim 1, it is characterized in that, described media business server also is used in the multicast address information of preserving described multicast channel, set up the corresponding relation between multicast channel sign and the described multicast address information, and when the multicast channel service request of the sign that comprises described multicast channel that receives described subscriber terminal equipment transmission, search described multicast address information according to described multicast channel sign.
9. method that is used for realizing the multimedia service multicast channel may further comprise the steps:
The multicast address information of multicast channel is stored in the media business server;
When receiving the service request of the described multicast channel that sends by subscriber terminal equipment, provide the multicast address information of described multicast channel for described subscriber terminal equipment; And
According to the multicast address information of described multicast channel, described subscriber terminal equipment is added multicast group, to obtain the code stream of described multicast channel.
10. method according to claim 9 is characterized in that, when receiving the service request of the described multicast channel that is sent by described subscriber terminal equipment, also provides the address information of available streaming media server for described subscriber terminal equipment.
11. want 10 described methods according to right, it is characterized in that, also comprise: according to the address information of described available streaming media server, send media play request to described streaming media server, control link with the media session of setting up described multicast channel code stream, thereby provide described subscriber terminal equipment that the code stream of described multicast channel is carried out time shift and media session control ability.
12. want 9 described methods according to right, it is characterized in that described subscriber equipment is handled described code stream with the display video picture after the code stream that receives described multicast channel, wherein, described processing includes but not limited to decoding processing.
13. method according to claim 9 is characterized in that, the media service request of described multicast channel comprises the sign of multicast channel, and described media business server is searched the multicast address information of described multicast channel according to the sign of described multicast channel.
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| CN111953584A (en) * | 2020-08-21 | 2020-11-17 | 北京一起教育信息咨询有限责任公司 | Method and system for optimizing real-time message channel flow |
| WO2022082825A1 (en) * | 2020-10-23 | 2022-04-28 | 郑州芯兰德网络科技有限公司 | Multicast system and multicast method for identifier resolution-based routing |
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