CN101888377A - Communication method, media server and communication system - Google Patents
Communication method, media server and communication system Download PDFInfo
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- CN101888377A CN101888377A CN201010192007XA CN201010192007A CN101888377A CN 101888377 A CN101888377 A CN 101888377A CN 201010192007X A CN201010192007X A CN 201010192007XA CN 201010192007 A CN201010192007 A CN 201010192007A CN 101888377 A CN101888377 A CN 101888377A
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Abstract
The invention provides a communication method, a media server and a communication system. The media server comprises a storage module, a first channel establishing module, a second channel establishing module and a media processing module, wherein the storage module is used for storing video files; the first channel establishing module is used for establishing a first media transmission channel between the media server and a communication terminal through a media gateway; the second channel establishing module is used for establishing a second media transmission channel between the media server and a second communication opposite terminal through the media gateway; and the media processing module is used for transmitting audio stream between the communication terminal and the second communication opposite terminal by using the first media transmission channel and the second media transmission channel, coding the video data in the video files into video stream and then sending the video stream to the communication terminal by using the first media transmission channel. The communication terminal with video communication capability can view images when processing voice services, so the processing capability of a 3G terminal is fully utilized, and the flexibility of multimedia services is enhanced.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of communication means and media server and communication system.
Background technology
The networking connection layout of existing 3G service network as shown in Figure 1, wherein:
Media server (Media Server, MS) be the autonomous device that the specialized media resource function is provided in the soft exchanging system, it also is the visual plant in the packet network, medium processing capacity in the fundamental sum enhancing business is provided, comprise dual-tone multifrequency (Dual Tone Multi Frequency, DTMF) various resource functions and communication function and the management maintenance functions such as conversion between the transmission of the generation of the collection of signal and decoding, signal tone and transmission, recorded announcement, meeting, different code decode algorithm.
Soft switch (Soft Switch, SS) be the nucleus equipment of Circuit Switching Network to Packet Based Network evolution, it also is one of visual plant of Next Generation Telecommunication Networks network, it is independent of the bottom bearing protocol, mainly finish major functions such as calling out control, media gateway access control, resource allocation, protocol processes, route, authentication, charging, and business and diversified third party's business that can provide the available circuit switch to provide to the user.
The logic that application server (Application Server) is responsible for various value-added services and IN service produces and management, and provide application programming interface (the Application ProgrammingInterface of various openings, API), the exploitation for third party's business provides authoring platform.Application server is an independently assembly, irrelevant with the soft switch of key-course, thereby realized business and called out separating of control, help the introducing of new business, generally comprise video-ready internet gateway (Video Internet Gateway, VIG) business module and video service module in the APP server.
(Media Gateway MGW) can become the media conversion in a kind of network the desired media formats of another kind of network to media gateway.For example: media gateway can be changed between the Media Stream of the bearer path of Circuit Switching Network and Packet Based Network, can processing audio, video or T.120, the ability that also can possess the combination in any of handling this three, can carry out the media translation of full duplex, can demonstration video/audio message, realize that other is that (Interactive Voice Response, IVR) function also can be carried out media conference etc. to interactive voice answering.
As shown in Figure 1,3G terminal inserts the APP server by SS, ask corresponding 3G multimedia service, and the APP server sends session initiation protocol (the SessionInitiation Protocol that triggers the 3G multimedia service to MS, SIP) message, carry out respective operations by MS according to sip message, the control audio-video frequency media is issued MGW, MGW is again according to MGCP (Media GatewayControl Protocol H.248/, MGCP) protocol transmission is given SS, MGW issues 3G terminal to corresponding medium bag simultaneously, and the 3G session begins like this.
Yet the inventor finds that there are the following problems at least for prior art in the process that realizes the embodiment of the invention:
In the above-mentioned process, between terminal and the opposite end or carry out video communication, perhaps carry out voice communication, in the process of voice communication, can not see any video, professional flexibility is not enough, and does not make full use of the disposal ability of 3G terminal.
Summary of the invention
The purpose of this invention is to provide a kind of communication means and media server and communication system, make full use of the disposal ability of 3G terminal, improve professional flexibility.
To achieve these goals, the embodiment of the invention provides a kind of media server, comprising:
Memory module is used for store video files;
First passage is set up module, is used for by first media transmission channel between media gateway foundation and the communication terminal;
Second channel is set up module, is used for by second media transmission channel between media gateway foundation and the second communication opposite end;
Medium process module, be used to utilize described first media transmission channel and second media transmission channel between described communication terminal and described second communication opposite end, to carry out the transmission of audio stream, and after the video data encoding in the described video file become video flowing, utilize described first media transmission channel to send to described communication terminal.
Above-mentioned media server wherein, is used to handle video traffic, also comprises:
Judging module is used for judging that can described first Correspondent Node carry out video traffic with described communication terminal when communication terminal request and first Correspondent Node carry out video traffic;
Trigger module is used for triggering described second channel and setting up module when described first Correspondent Node can't carry out video traffic with described communication terminal.
Above-mentioned media server, wherein, described media server also comprises:
Negotiation module is used for described communication terminal and second communication opposite end alternately, obtains the coding/decoding capability of described communication terminal and second communication opposite end;
Described medium process module specifically comprises:
First processing unit after first audio stream that is used for receiving from first media transmission channel is converted to second audio stream that can decode described second communication opposite end, sends to described second communication opposite end by second media transmission channel;
Second processing unit, the 3rd audio stream that is used for receiving from second media transmission channel send to described communication terminal by first media transmission channel after being converted to the 4th audio stream that described communication terminal can decode;
The 3rd processing unit, be used for video data encoding with described video file become described communication terminal can decoded video stream after, utilize described first media transmission channel to send to described communication terminal.
Above-mentioned media server, wherein, described first Correspondent Node possesses the 3G communication capacity, and the second communication opposite end only possesses the 2G communication capacity.
To achieve these goals, the embodiment of the invention also provides a kind of communication means, comprising:
Media server is by first media transmission channel between media gateway foundation and the described communication terminal;
Media server is by second media transmission channel between media gateway foundation and the second communication opposite end;
Described media server utilizes described first media transmission channel and second media transmission channel to carry out the transmission of audio stream between described communication terminal and described second communication opposite end;
After described media server becomes video flowing with the video data encoding in the video file of preserving in the media server, utilize described first media transmission channel to send to described communication terminal.
Above-mentioned communication means wherein, is used to handle video traffic, also comprises before second media transmission channel between described media server foundation and the second communication opposite end:
When communication terminal request and first Correspondent Node carried out described video traffic, media server judged that can described first Correspondent Node carry out video traffic with described communication terminal;
When described first Correspondent Node can't carry out video traffic with described communication terminal, enter the step of second media transmission channel between foundation and the second communication opposite end.
Above-mentioned communication means wherein, also comprises:
Media server and described communication terminal and second communication opposite end are mutual, obtain the coding/decoding capability of described communication terminal and second communication opposite end;
The transmission that described media server utilizes described first media transmission channel and second media transmission channel to carry out audio stream between described communication terminal and described second communication opposite end specifically comprises:
Media server will send to described second communication opposite end by second media transmission channel after will being converted to second audio stream that can decode described second communication opposite end from first audio stream that first media transmission channel receives;
Media server will send to described communication terminal by first media transmission channel after will being converted to the 4th audio stream that described communication terminal can decode from the 3rd audio stream that second media transmission channel receives;
After described media server becomes video flowing with the video data encoding in the video file, utilize described first media transmission channel to send to described communication terminal and specifically comprise:
Media server with the video data encoding in the described video file become described communication terminal can decoded video stream after, utilize described first media transmission channel to send to described communication terminal.
Above-mentioned communication means, wherein, described first Correspondent Node possesses the 3G communication capacity, and the second communication opposite end only possesses the 2G communication capacity.
To achieve these goals, the embodiment of the invention also provides a kind of communication system, comprises media gateway and media server, and described media server comprises:
Memory module is used for store video files;
First passage is set up module, is used for by first media transmission channel between media gateway foundation and the described communication terminal;
Second channel is set up module, is used for by second media transmission channel between media gateway foundation and the second communication opposite end;
Medium process module, be used to utilize described first media transmission channel and second media transmission channel between described communication terminal and described second communication opposite end, to carry out the transmission of audio stream, and after the video data encoding in the described video file become video flowing, utilize described first media transmission channel to send to described communication terminal.
Above-mentioned communication system wherein, is used to handle video traffic, and described communication system also comprises:
Judging module is used for judging that can described first Correspondent Node carry out video traffic with described communication terminal when communication terminal request and first Correspondent Node carry out video traffic;
Trigger module is used for triggering described second channel and setting up module when described first Correspondent Node can't carry out video traffic with described communication terminal.
Above-mentioned communication system, wherein, described media server also comprises:
Negotiation module is used for described communication terminal and second communication opposite end alternately, obtains the coding/decoding capability of described communication terminal and second communication opposite end;
Described medium process module specifically comprises:
First processing unit after first audio stream that is used for receiving from first media transmission channel is converted to second audio stream that can decode described second communication opposite end, sends to described second communication opposite end by second media transmission channel;
Second processing unit, the 3rd audio stream that is used for receiving from second media transmission channel send to described communication terminal by first media transmission channel after being converted to the 4th audio stream that described communication terminal can decode;
The 3rd processing unit, be used for video data encoding with described video file become described communication terminal can decoded video stream after, utilize described first media transmission channel to send to described communication terminal.
Above-mentioned communication system, wherein, described first Correspondent Node possesses the 3G communication capacity, and the second communication opposite end only possesses the 2G communication capacity.
The embodiment of the invention has following beneficial effect:
In the embodiment of the invention, when the communication terminal that possesses the video communication ability is preset when professional to the communication system request, communication system is set up the audio stream transmission channel between communication terminal and the Correspondent Node, make and carry out voice-frequency telephony between communication terminal and the Correspondent Node, simultaneously, utilize the video flowing transmission channel between communication system and the communication terminal, for communication terminal sends video flowing, make the communication terminal that possesses the video communication ability when processed voice is professional, also can carry out viewing and admiring of image, fully utilize the disposal ability of 3G terminal, strengthened the flexibility of multimedia service.
Description of drawings
Fig. 1 is the networking connection diagram of existing 3G service network;
Fig. 2 is the communication system of the embodiment of the invention and a kind of structural representation of media server;
Fig. 3 is the communication system of the embodiment of the invention and another structural representation of media server;
Fig. 4 is the schematic flow sheet of the communication means of the embodiment of the invention.
Embodiment
In the embodiment of the invention, when the communication terminal that possesses the video communication ability is preset when professional to the communication system request, communication system is set up the audio stream transmission channel between communication terminal and the Correspondent Node, make and carry out voice-frequency telephony between communication terminal and the Correspondent Node, simultaneously, setting up video flowing transmission channel between self and the communication terminal for communication system, is that communication terminal sends video flowing, make full use of the disposal ability of 3G terminal, strengthen the flexibility of multimedia service.
Before the specific embodiment of the invention was elaborated, the several notions that earlier embodiment of the invention related to made an explanation, and are beneficial to better understand the present invention.
Video file is the file that carries image at least, wherein comprises video data at least, as the file of various forms such as RM, AVI, MPEG, DAT;
Video flowing is used to carry the Media Stream of video data;
Audio stream is used to carry the Media Stream of voice data.
As shown in Figure 2, the communication system of the embodiment of the invention comprises media server and media gateway, wherein:
Be provided with in the described media server:
Memory module is used for store video files;
First passage is set up module, is used for by first media transmission channel between media gateway foundation and the described communication terminal;
Second channel is set up module, is used for by second media transmission channel between media gateway foundation and the second communication opposite end;
Medium process module, be used to utilize described first media transmission channel and second media transmission channel between described communication terminal and described second communication opposite end, to carry out the transmission of audio stream, and after the video data encoding in the described video file become video flowing, utilize described first media transmission channel to send to described communication terminal.
In the embodiment of the invention, when carrying out signatory default business to the communication system request, the communication terminal that possesses the video communication ability (as: carries out in the process of voice communication the user, be its playing video file) time, communication system is set up the audio stream transmission channel between communication terminal and the Correspondent Node, make and carry out voice-frequency telephony between communication terminal and the Correspondent Node, simultaneously, for communication system is set up video flowing transmission channel between self and the communication terminal, for communication terminal sends video flowing, make full use of the disposal ability of 3G terminal, strengthen the flexibility of multimedia service.
Certainly, what above-mentioned user contracted only is a kind of scene of the embodiment of the invention, the method of the embodiment of the invention can also be applied to following scene: when the communication terminal that possesses the video communication ability when communication system request and first Correspondent Node carry out video traffic, when communication system finds that first Correspondent Node can't carry out video traffic, communication system is set up the audio stream transmission channel between communication terminal and the second communication opposite end, make between communication terminal and the second communication opposite end and carry out voice-frequency telephony, simultaneously, for communication system is set up video flowing transmission channel between self and the communication terminal, for communication terminal sends video flowing, make full use of the disposal ability of 3G terminal, strengthen the flexibility of multimedia service.
Under the above-mentioned application scenarios, as shown in Figure 3, also be provided with in the described media server:
Judging module is used for judging that can described first Correspondent Node carry out video traffic with described communication terminal when communication terminal request and first Correspondent Node carry out video traffic;
Trigger module is used for triggering described second channel and setting up module when described first Correspondent Node can't carry out video traffic with described communication terminal.
Certainly, for whole communication system, this judging module and trigger module can also be to be arranged in the application server.
Certainly, though among Fig. 3, first Correspondent Node is expressed as different entities with the second communication opposite end, should be understood that the two also can be a same target, this point can describe follow-up.
As shown in Figure 4, the communication system communication means of the embodiment of the invention comprises:
After step 44, media server become video flowing with the video data encoding in the video file of preserving in the media server, utilize described first media transmission channel to send to described communication terminal.
Should be understood that, though above step 43 and step 44 have on the description order have earlier after, on behalf of its execution sequence, this branch of is priority arranged, and can be to occur in sequence with any between 2, as successively take place, generation simultaneously etc.
Certainly, the method of the embodiment of the invention can be applied to following scene: when the communication terminal that possesses the video communication ability when communication system request and first Correspondent Node carry out video traffic, when communication system finds that first Correspondent Node can't carry out video traffic, communication system is set up the audio stream transmission channel between communication terminal and the second communication opposite end, make between communication terminal and the second communication opposite end and carry out voice-frequency telephony, simultaneously, for communication system is set up video flowing transmission channel between self and the communication terminal, for communication terminal sends video flowing, make full use of the disposal ability of 3G terminal, strengthen the flexibility of multimedia service.
Under the above-mentioned application scenarios, the communication system communication means of the embodiment of the invention comprises:
Step 51, when communication terminal request and first Correspondent Node carry out video traffic, media server set up by media gateway and described communication terminal between first media transmission channel;
Step 52, media server judge that can described first Correspondent Node carry out video traffic with described communication terminal, if then enter step 53, otherwise handle by normal flow;
Step 53, media server is by second media transmission channel between media gateway foundation and the second communication opposite end;
Step 54, media server utilize described first media transmission channel and second media transmission channel to carry out the transmission of audio stream between described communication terminal and described second communication opposite end;
After step 55, media server become video flowing with the video data encoding in the video file, utilize described first media transmission channel to send to described communication terminal.
In specific embodiments of the invention, medium process module need utilize media transmission channel to carry out the transmission of audio stream between communication terminal and Correspondent Node, and after the video data encoding in the described video file become video flowing, utilize described first media transmission channel to send to described communication terminal.
Therefore, medium process module need be known the coding/decoding capability of described communication terminal, and generally all be provided with a negotiation module in the media server, be used for described communication terminal and second communication opposite end mutual, obtain the coding/decoding capability of described communication terminal and second communication opposite end, in specific embodiments of the invention, negotiation module can be described the coding/decoding capability that part is determined by the SDP (Session Description Protocol, Session Description Protocol) that analyzes in the INVITE signaling.
As follows, for a kind of concrete SDP describes giving an example of part:
m＝audio?10320?RTP/AVP?96
a＝rtpmap：96?ARM/8000
a＝sendrecv
m＝video?10322?RTP/AVP?99
a＝rtpmap：99?H263-1998/90000
a＝fmtp：99?QCIF＝2
a＝sendrecv
In the above-mentioned example, the code/decode format of the audio frequency that " m=audio 10320 RTP/AVP 96a=rtpmap:96 AMR/8000 " express support for, " m=video 10322 RTP/AVP 99a=rtpmap:99H263-1998/90000 ", the code/decode format of the video that expresses support for.
Certainly, above-mentioned only is a kind of illustrating, how to transmit coding/decoding capability, the structure of transmitting the frame that coding/decoding capability adopted is not limited to upper type, as long as both sides have discussed communication format in advance, make the opposite end obtain the other side's coding/decoding capability and get final product according to discussing measured format analysis in advance.
After negotiation module was obtained the coding/decoding capability of described communication terminal and Correspondent Node, then described medium process module specifically comprised:
First processing unit after first audio stream that is used for receiving from first media transmission channel is converted to second audio stream that can decode described second communication opposite end, sends to described second communication opposite end by second media transmission channel;
Second processing unit, the 3rd audio stream that is used for receiving from second media transmission channel send to described communication terminal by first media transmission channel after being converted to the 4th audio stream that described communication terminal can decode;
The 3rd processing unit, be used for video data encoding with described video file become described communication terminal can decoded video stream after, utilize described first media transmission channel to send to described communication terminal.
And described communication means also comprises:
Media server and described communication terminal and second communication opposite end are mutual, obtain the coding/decoding capability of described communication terminal and second communication opposite end;
Described media server utilizes described first media transmission channel and second media transmission channel to carry out the transmission of audio stream between described communication terminal and described second communication opposite end, and after the video data encoding in the described video file become video flowing, utilize described first media transmission channel to send to described communication terminal and specifically comprise:
Media server will send to described second communication opposite end by second media transmission channel after will being converted to second audio stream that can decode described second communication opposite end from first audio stream that first media transmission channel receives;
Media server will send to described communication terminal by first media transmission channel after will being converted to the 4th audio stream that described communication terminal can decode from the 3rd audio stream that second media transmission channel receives;
Media server with the video data encoding in the described video file become described communication terminal can decoded video stream after, utilize described first media transmission channel to send to described communication terminal.
Should be understood that, though 3 above steps have on the description order have earlier after, on behalf of its execution sequence, this branch of priority is arranged, and can be simultaneous between 3, certainly has relation successively yet.
In specific embodiments of the invention, judging module is when communication terminal request and first Correspondent Node carry out video traffic, judge that can described first Correspondent Node carry out video traffic with described communication terminal, and described first Correspondent Node can not carry out video traffic with described communication terminal can be a variety of causes, as:
Network quality reason, the first Correspondent Node present located network environment are not enough to support to carry out video traffic;
The not signatory video traffic of service contracting reason, first Correspondent Node;
Disposal ability reason, first Correspondent Node do not possess the ability of the video traffic of this request of processing, as do not have camera;
Network type reason, first Correspondent Node are the 2G terminal, do not possess the ability of carrying out video traffic.
Certainly, above-mentioned only is to understand that for example first Correspondent Node can not carry out the possible cause of video traffic with described communication terminal, it can also be other reason, as the user who holds first Correspondent Node refuses the audio frequency and video conversation, and selection voice-frequency telephony, and for example first Correspondent Node is a service platform, and it can provide the service object of video traffic limited simultaneously, and the current service object has reached maximum.
First Correspondent Node can not can also have multiple with the reason that described communication terminal carries out video traffic, again can not enumerate one by one at this.
In specific embodiments of the invention, this first Correspondent Node and second communication opposite end can be communication terminals, can be communications platform also, and first Correspondent Node can be identical objects with the second communication opposite end, also can be different objects, illustrate as follows below respectively.
＜situation one 〉
First Correspondent Node and second communication opposite end are not same targets, and type is identical, be respectively the different seat service systems that a certain company provides as first Correspondent Node and second communication opposite end, comprise (the support video customer service of first customer service platform, the 3G communication capacity) and second customer service platform (only support voice customer service, 2G communication capacity).
Suppose that the user utilizes its 3G mobile A to initiate request and carries out the video customer service with first customer service platform, media server is by finding that with first customer service platform is mutual first customer service platform is (too many as the service-user number for a certain reason, the rest network resource can't be supported new video customer service etc.) can't be for carrying out video traffic with 3G mobile A, but this moment, second customer service platform also has enough resources to provide voice service for the client, in this case, media server set up at first respectively and second customer service platform and 3G mobile A between media channel, simultaneously, media server by and second customer service platform between media channel receive audio stream and change after, by and 3G mobile A between media channel send to 3G mobile A, simultaneously media server by and 3G mobile A between media channel receive audio stream and change after, by and second customer service platform between media channel send to second customer service platform, in this case, 3G mobile A has accepted the voice customer service.
And simultaneously, media server also extracts the video data in the corresponding video file, is converted to video flowing and sends to 3G mobile A afterwards, and this moment, the user just can watch image simultaneously by decoded video streams.
Can find by above description, though 3G mobile A can not accept the video customer service, but it has also watched associated video when enjoying the voice customer service, compare with respect to enjoying the voice customer service before, make full use of the disposal ability of 3G terminal, strengthened the flexibility of multimedia service.
Whether accept the service of this form as for 3G mobile A, can select to the user, as finding that at media server first customer service platform can't be for carrying out video traffic with 3G mobile A, to 3G mobile A backtrack menu, select method of service for the user, when the user only selects voice service, then do not need to return video flowing to the user, and when the user selects the video assistant service, then provide service for the user by process described above.
＜situation two 〉
First Correspondent Node and second communication opposite end are not same targets, and type difference, as first Correspondent Node is communications platform, first customer service platform that provides as a certain company (supporting the video customer service), and first Correspondent Node is 2G mobile phone (as customer service manager's a mobile phone).
Suppose that the user utilizes its 3G mobile A to initiate request and carries out the video customer service with first customer service platform, media server is by finding that with first customer service platform is mutual first customer service platform is (too many as the service-user number for a certain reason, the rest network resource can't be supported new video customer service etc.) can't be for carrying out video traffic with 3G mobile A, in this case, media server set up at first respectively and 2G mobile phone and 3G mobile A between media channel, simultaneously, media server by and the 2G mobile phone between media channel receive audio stream and change after, by and 3G mobile A between media channel send to 3G mobile A, simultaneously media server by and 3G mobile A between media channel receive audio stream and change after, by and second customer service platform between media channel send to second customer service platform, in this case, 3G mobile A has accepted the voice customer service that the customer manager provides for it.
And simultaneously, media server also extracts the video data in the corresponding video file, is converted to video flowing and sends to 3G mobile A afterwards, and this moment, the user just can watch image simultaneously by decoded video streams.
Can find by above description, though 3G mobile A can not accept the video customer service, but it has also watched associated video when enjoying the voice customer service, compare with respect to enjoying the voice customer service before, make full use of the disposal ability of 3G terminal, strengthened the flexibility of multimedia service.
Whether accept the service of this form as for 3G mobile A, can select to the user, as finding that at media server first customer service platform can't be for carrying out video traffic with 3G mobile A, to 3G mobile A backtrack menu, select method of service for the user, when the user only selects voice service, then do not need to return video flowing to the user, and when the user selects the video assistant service, then provide service for the user by process described above.
＜situation three 〉
First Correspondent Node and second communication opposite end are not same targets, and type is identical, are 3G mobile A as first Correspondent Node, and the second communication opposite end is 2G terminal B.
Suppose that the user utilizes its 3G mobile A to initiate request and carries out video traffic with 2G terminal B, media server is found 2G terminal B and can't be carried out video traffic owing to be subject to network type (2G network), in this case, media server set up at first respectively and 2G terminal B and 3G mobile A between media channel, simultaneously, media server by and 2G terminal B between media channel receive audio stream and change after, by and 3G mobile A between media channel send to 3G mobile A, simultaneously media server by and 3G mobile A between media channel receive audio stream and change after, by and 2G terminal B between media channel send to 2G terminal B, in this case, 3G mobile A can carry out voice communication with 2G terminal B.
And simultaneously, media server also extracts the video data in the corresponding video file, is converted to video flowing and sends to 3G mobile A afterwards, and this moment, the user just can watch image (as dumb show, noiseless animation etc.) simultaneously by decoded video streams.
Can find by above description, though 3G mobile A carries out video traffic, it has also watched video when carrying out voice communication, is engaged in comparing with respect to carrying out voice call before, make full use of the disposal ability of 3G terminal, strengthened professional flexibility.
＜situation four 〉
First Correspondent Node and second communication opposite end same target are as 3G terminal C.
Suppose that the user utilizes its 3G mobile A to initiate request and carries out video traffic with 3G terminal C, media server finds that 3G terminal C can't carry out video traffic owing to being subject to the network quality reason, in this case, media server set up at first respectively and 3G terminal C and 3G mobile A between media channel, simultaneously, media server by and 3G terminal C between media channel receive audio stream and change after, by and 3G mobile A between media channel send to 3G mobile A, simultaneously media server by and 3G mobile A between media channel receive audio stream and change after, by and 3G terminal C between media channel send to 3G terminal C, in this case, 3G mobile A can carry out voice communication with 3G terminal C.And simultaneously, media server also extracts the video data in the corresponding video file, is converted to video flowing and sends to 3G mobile A afterwards, and this moment, the user just can watch image (as dumb show, noiseless animation etc.) simultaneously by decoded video streams.
At this moment, media server just can be realized the voice communication between 3G terminal A and the 3G terminal C, and is 3G terminal A playing video simultaneously.
Certainly, above-mentioned situation one, two, three and four only illustrates, for the combined situation of other first Correspondent Nodes and second communication opposite end, in this explanation for example that differs.
A kind of specific implementation with the method for using the embodiment of the invention is elaborated below, comprising:
Step 31,3G video user incoming call SS, MGW receives the H.324M Media Stream of 3G video user simultaneously;
Step 32, SS is transferred to the APP server with calling, controls media server behind the VIG business module in the APP server;
Step 33, media server are under the control of VIG business module, and be mutual with MGW, and the H.324M medium of 3G video user are routed to media server;
Step 34, when Correspondent Node can't provide video traffic, media server was defined as providing 2G voice service with user interactions (directly determine or by determining alternately with the 3G video user) for the user;
After step 35, media server are defined as the user 2G voice service are provided, the notice application server;
Step 36, after application server had notice, the control media server was initiated new audio call, the Media Stream passage between foundation and the 2G platform;
Step 37, the 3G video user is carried out interactive voice by media server and 2G platform by the Media Stream passage of setting up;
Step 38, the video service module in the application server sends the SIP:info request to the VIG business module, and request is play designated to the 3G video user;
Step 39, the VIG business module issues the SIP:info request to media server;
After step 40, media server receive SIP:info request, extract the video data in the corresponding video file after, video data encoding is video flowing after, send to the 3G video user by the media channel of having set up.
In above-mentioned process, after application server has notice, the control media server is initiated new audio call, Media Stream passage between foundation and the 2G platform, this moment is in the mutual process of media server and 2G platform, the SIP that the 2G platform can be initiated Reinvite asks to media server, and after media server MS receives the SIP request of 2G platform, carry out the setting of audio frequency media stream translation according to the SDP information of reinvite, and return response message, the 2G platform will send audio stream to MS after receiving response message, voice-frequency telephony this moment begins, and 2G platform and 3G video user are carried out voice communication with media server as terminal.
In above-mentioned process, the SIP:info request that application server sends, when media server is judged needs to the collar extension displaying video of SIP side according to SIP:info request, can apply for a new SIP video port, and it is connected with the collar extension of SIP on the media server, the SIP video port by this new application carries out video playback.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. a media server is characterized in that, comprising:
Memory module is used for store video files;
First passage is set up module, is used for by first media transmission channel between media gateway foundation and the communication terminal;
Second channel is set up module, is used for by second media transmission channel between media gateway foundation and the second communication opposite end;
Medium process module, be used to utilize described first media transmission channel and second media transmission channel between described communication terminal and described second communication opposite end, to carry out the transmission of audio stream, and after the video data encoding in the described video file become video flowing, utilize described first media transmission channel to send to described communication terminal.
2. media server according to claim 1 is characterized in that, is used to handle video traffic, also comprises:
Judging module is used for judging that can described first Correspondent Node carry out video traffic with described communication terminal when communication terminal request and first Correspondent Node carry out video traffic;
Trigger module is used for triggering described second channel and setting up module when described first Correspondent Node can't carry out video traffic with described communication terminal.
3. media server according to claim 2 is characterized in that, described media server also comprises:
Negotiation module is used for described communication terminal and second communication opposite end alternately, obtains the coding/decoding capability of described communication terminal and second communication opposite end;
Described medium process module specifically comprises:
First processing unit after first audio stream that is used for receiving from first media transmission channel is converted to second audio stream that can decode described second communication opposite end, sends to described second communication opposite end by second media transmission channel;
Second processing unit, the 3rd audio stream that is used for receiving from second media transmission channel send to described communication terminal by first media transmission channel after being converted to the 4th audio stream that described communication terminal can decode;
The 3rd processing unit, be used for video data encoding with described video file become described communication terminal can decoded video stream after, utilize described first media transmission channel to send to described communication terminal.
4. according to claim 2 or 3 described media servers, it is characterized in that described first Correspondent Node possesses the 3G communication capacity, the second communication opposite end only possesses the 2G communication capacity.
5. a communication means is characterized in that, comprising:
Media server is by first media transmission channel between media gateway foundation and the described communication terminal;
Media server is by second media transmission channel between media gateway foundation and the second communication opposite end;
Described media server utilizes described first media transmission channel and second media transmission channel to carry out the transmission of audio stream between described communication terminal and described second communication opposite end;
After described media server becomes video flowing with the video data encoding in the video file of preserving in the media server, utilize described first media transmission channel to send to described communication terminal.
6. communication means according to claim 5 is characterized in that, is used to handle video traffic, also comprises before second media transmission channel between described media server foundation and the second communication opposite end:
When communication terminal request and first Correspondent Node carried out described video traffic, media server judged that can described first Correspondent Node carry out video traffic with described communication terminal;
When described first Correspondent Node can't carry out video traffic with described communication terminal, enter the step of second media transmission channel between foundation and the second communication opposite end.
7. communication means according to claim 5 is characterized in that, also comprises:
Media server and described communication terminal and second communication opposite end are mutual, obtain the coding/decoding capability of described communication terminal and second communication opposite end;
The transmission that described media server utilizes described first media transmission channel and second media transmission channel to carry out audio stream between described communication terminal and described second communication opposite end specifically comprises:
Media server will send to described second communication opposite end by second media transmission channel after will being converted to second audio stream that can decode described second communication opposite end from first audio stream that first media transmission channel receives;
Media server will send to described communication terminal by first media transmission channel after will being converted to the 4th audio stream that described communication terminal can decode from the 3rd audio stream that second media transmission channel receives;
After described media server becomes video flowing with the video data encoding in the video file, utilize described first media transmission channel to send to described communication terminal and specifically comprise:
Media server with the video data encoding in the described video file become described communication terminal can decoded video stream after, utilize described first media transmission channel to send to described communication terminal.
8. according to claim 5 or 6 described communication meanss, it is characterized in that described first Correspondent Node possesses the 3G communication capacity, the second communication opposite end only possesses the 2G communication capacity.
9. a communication system comprises media gateway and media server, it is characterized in that, described media server comprises:
Memory module is used for store video files;
First passage is set up module, is used for by first media transmission channel between media gateway foundation and the communication terminal;
Second channel is set up module, is used for by second media transmission channel between media gateway foundation and the second communication opposite end;
Medium process module, be used to utilize described first media transmission channel and second media transmission channel between described communication terminal and described second communication opposite end, to carry out the transmission of audio stream, and after the video data encoding in the described video file become video flowing, utilize described first media transmission channel to send to described communication terminal.
10. communication system according to claim 9 is characterized in that, is used to handle video traffic, and described communication system also comprises:
Judging module is used for judging that can described first Correspondent Node carry out video traffic with described communication terminal when communication terminal request and first Correspondent Node carry out video traffic;
Trigger module is used for triggering described second channel and setting up module when described first Correspondent Node can't carry out video traffic with described communication terminal.
11. communication system according to claim 10 is characterized in that, described media server also comprises:
Negotiation module is used for described communication terminal and second communication opposite end alternately, obtains the coding/decoding capability of described communication terminal and second communication opposite end;
Described medium process module specifically comprises:
First processing unit after first audio stream that is used for receiving from first media transmission channel is converted to second audio stream that can decode described second communication opposite end, sends to described second communication opposite end by second media transmission channel;
Second processing unit, the 3rd audio stream that is used for receiving from second media transmission channel send to described communication terminal by first media transmission channel after being converted to the 4th audio stream that described communication terminal can decode;
The 3rd processing unit, be used for video data encoding with described video file become described communication terminal can decoded video stream after, utilize described first media transmission channel to send to described communication terminal.
12., it is characterized in that described first Correspondent Node possesses the 3G communication capacity according to claim 10 or 11 described communication systems, the second communication opposite end only possesses the 2G communication capacity.
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| CN201010192007XA CN101888377A (en) | 2010-05-26 | 2010-05-26 | Communication method, media server and communication system |
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| CN201010192007XA CN101888377A (en) | 2010-05-26 | 2010-05-26 | Communication method, media server and communication system |
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Application publication date: 20101117 |