CN101686178B - Method and system for improving multi-media connection quality, media control and processing equipment - Google Patents
Method and system for improving multi-media connection quality, media control and processing equipment Download PDFInfo
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- 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
- H04L65/80—Responding to QoS
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- 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
- H04L65/752—Media network packet handling adapting media to network capabilities
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- 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
- H04L65/756—Media network packet handling adapting media to device capabilities
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- H—ELECTRICITY
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- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
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- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
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- H04L65/1101—Session protocols
- H04L65/1106—Call signalling protocols; H.323 and related
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- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
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Abstract
The embodiment of the invention relates to method and system for improving multi-media connection quality and media control and processing equipment. In the invention, through comparing the parameters of a quality information feedback with corresponding parameters in a present session, the media control equipment notifies a transcoding machine of the media processing equipment to dynamically regulate media data; or through trigging the negotiation between the media control equipment and a multi-media terminal, the media data is regulated dynamically; or through expanding a H.248 indicative massage of the media control equipment, the media processing equipment is ordered to send a quality expansion message to dynamically regulate the media data so as to improve the multi-media connection quality; moreover, the media processing equipment can be used to dynamically detect the quality of the media data transmitted from a media data sending side in the process of the coding and decoding and transmission of the media data, and to notify the media control equipment of the quality problems when the quality decreases, and then the media control equipment interacts with the media data sending side so as to regulate the media data sent by the media data sending side.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of raising multi-media connection quality method and system, medium control device and medium processing device.
Background technology
Multimedia communications system is meant can provide Multimedia session, like the network system of audio frequency and video communication.There is multiple multimedia communications system at present, comprises that H.324, H.245, H.223 employing waits the H.324 network of agreement; Adopt H.323, H.225.0, H.245, RTP (Real-time Transport Protocol; Hereinafter to be referred as RTP)/the H.323 network of RTCP Real-time Transport Control Protocol agreements such as (Real-time Transport Control Protocol are hereinafter to be referred as RTCP); Adopt conversation initialized protocol (Session Initiation Protocol; Hereinafter to be referred as SIP), Session Description Protocol (Session Description Protocol; Hereinafter to be referred as SDP), protocol of I P IP multimedia subsystem, IMS (IP Multimedia Subsystem is hereinafter to be referred as IMS) network such as RTP/RTCP or the like.
Intercommunication between the different multimedia communication system need realize the intercommunication of signaling and medium, is generally cooperated by medium control device and medium processing device under the separation architecture and accomplishes.In various network, incomplete same as the entity of medium control device and medium processing device.For example: medium control device can be Media Gateway Controller (Media Gateway Controller is hereinafter to be referred as MGC), Mobile Switching Center Server, MGCF, media resource function control etc.; Medium processing device can be WMG (Media Gateway is hereinafter to be referred as MGW), IP multimedia-WMG, media resource function processing etc.In this article, unified with MGC and MGW general designation as medium control device and medium processing device.Medium control device is mainly born the processing of signaling, and medium processing device is mainly born the processing of media bearer.
At present, in the MTSI of 3GPP (IMS mediaphone) standard, introducing the speech quality that dynamic rate adaptation mechanism improves mediaphone under the IMS.Through between two multimedia terminals, increasing the mechanism of some band internal feedbacks, come the dynamically speech quality of adjustment mediaphone.Mainly expanded the feedback of balance, screen buffer information and the average receiving velocity of bandwidth information, frame per second and video image.
Among the existing 3GPP TS26.114, provided the rate adaption method in the media termination conversation in various network.Media termination with IMS network side and circuit switching (Circuit Switch is hereinafter to be referred as CS) network side is example alternately, and IMS network side as shown in Figure 1 is to the rate adapted sketch map of CS network side; The IMS network side to the process of the elimination jitter-buffer of CS network side is: when the data of IMS network side transmitted are steady inadequately, when causing the buffering area of MGW to overflow, MGW is with packet discard; And send the RTCP reception to the IMS multimedia terminal and report (Receive Report; Be called for short RR) message, notice IMS multimedia terminal packet is lost, and the IMS multimedia terminal can take further step to eliminate shake; The process that encoding and decoding are consulted again can be initiated in the IMS multimedia terminal; Carrying out the modification of encoding and decoding, thereby select the coding of little bandwidth, guarantee data transmission quality.
But, at the CS network side in the process of the elimination jitter-buffer of IMS network side, when the data of CS network side transmitted steady inadequately; When causing buffering area to overflow; When perhaps MGW detected the data generation packet loss phenomenon from the CS network side, because H.245 message terminates in MGC, and MGC can not get access to the detected media data quality information of MGW; Therefore; Under above-mentioned scene, can not trigger accordingly H.245 message, flow control information is fed back to the H.324 multimedia terminal of CS network side, thereby H.324 the multimedia terminal can not be handled eliminating jitter-buffer by MGC.
But, in existing 3GPP TS29.163, defined by the CS network side Flow Control initiated of multimedia terminal H.324.For example, when H.324 move in wireless environment the multimedia terminal, bad like wireless signal; At this moment H.324 this can receive the notice that bearing capacity reduces in the multimedia terminal; H.324 H.245 flow-control command can be initiated in the multimedia terminal, and notice MGC and its bandwidth of MGW diminish, and MGC can close old logical channel according to the indication of flow-control command; Again carry out coding/decoding negotiation, open new bearer path then.
But, in the method, when H.324 Flow Control is initiated in the multimedia terminal, only can trigger the negotiation again of encoding and decoding.Need to carry out in the situation of Flow Control be need not change encoding and decoding to majority, possibly only need consult bandwidth again or the encoding and decoding speed upgraded identical code encoding/decoding mode under perhaps notifies the adjustment of IMS multimedia terminal to get final product.Thus it is clear that, can not realize the flow control procedure except that encoding and decoding are consulted again by this flow control procedure of H.324 multimedia terminal initiation.
Summary of the invention
The embodiment of the invention provides a kind of raising multi-media connection quality method and system, medium control device and medium processing device, when initiating Flow Control in the multimedia terminal, realizes multiple Flow Control mode, thereby improves the speech quality of multimedia terminal;
The embodiment of the invention also provides a kind of raising multi-media connection quality method and system, medium control device and medium processing device; To detect the media data quality that send the multimedia terminal; And trigger and give the multimedia terminal with quality information feedback, to improve the speech quality of multimedia terminal.
The embodiment of the invention provides a kind of raising multi-media connection quality method, comprising:
Medium control device receives the quality information feedback that send first multimedia terminal;
According to said quality information feedback, the media data of said first multimedia terminal is sent in the adjustment of indication source of media end;
Second multimedia terminal is as said source of media end, and is then said according to said quality information feedback, and the media data that said first multimedia terminal is sent in the adjustment of indication source of media end comprises:
Extract the parameter in the said quality information feedback, in order to expand H.248 Indication message; Indicate said medium processing device structure quality amplifying message and send it through the H.248 Indication message after the expansion to said second multimedia terminal; The media data of said first multimedia terminal is sent in said second multimedia terminal according to the information in said quality amplifying message adjustment; Perhaps
Parameter in the more said quality information feedback and the relevant parameter in the current sessions; According to comparative result trigger with said first multimedia terminal and/or with the negotiation again of said second multimedia terminal, send to the media data of said first multimedia terminal with adjustment.
The embodiment of the invention provides a kind of medium control device, comprising:
First receiver module is used to receive the quality information feedback that send first multimedia terminal, and said quality information comprises at least a than in request, packet loss information, the buffer information of maximum bandwidth request, frame per second and image resolution ratio balance;
First indicating module is used for according to said quality information feedback, and the media data of said first multimedia terminal is sent in the adjustment of indication source of media end, and said source of media end is the medium processing device or second multimedia terminal;
Said first indicating module comprises:
Comparison sub-module is used for the parameter of more said quality information feedback and the relevant parameter in the current sessions;
Trigger submodule, be used for comparative result according to said comparison sub-module output trigger with said first multimedia terminal and/or with the negotiation again of said second multimedia terminal, send to the media data of said first multimedia terminal with adjustment; Perhaps
Said first indicating module comprises:
The expansion submodule is used for extracting the parameter of said quality information feedback, expands H.248 Indication message;
The indication submodule is used for indicating said medium processing device structure quality amplifying message and sending it to said second multimedia terminal through the H.248 Indication message after the expansion.
The embodiment of the invention provides a kind of raising multi-media connection quality system, comprises first multimedia terminal, second multimedia terminal, medium control device and medium processing device, wherein:
Aforesaid medium control device;
Medium processing device; Be used for H.248 Indication message according to said medium control device transmission; Structure quality amplifying message also sends it to said second multimedia terminal, so that the media data of said first multimedia terminal is sent in said second multimedia terminal according to the information in said quality amplifying message adjustment.
Can know by above technical scheme; Raising multi-media connection quality method and system, medium control device and the medium processing device of the embodiment of the invention; Can parameter in the quality information feedback and the relevant parameter in the current sessions be compared through medium control device; And then the transcoding device in the notice medium processing device is dynamically adjusted media data; Perhaps come dynamically adjustment media data through the negotiation that triggers medium control device and multimedia terminal; Perhaps, send the quality amplifying message by medium control device indication medium processing device and come dynamically adjustment media data, thereby improve multi-media connection quality through the H.248 Indication message between extended medium control appliance and the medium processing device; Can also be in the process of participating in encoding and decoding and media delivery through medium processing device; The quality of the media data that detection of dynamic source of media end is sent; And when quality descends; With quality problems information notice medium control device, medium control device can carry out alternately with the source of media end, with the media data of adjustment source of media end transmission.
Description of drawings
Fig. 1 is the rate adapted sketch map of prior art IMS network side to the CS network side;
Fig. 2 A is the message format sketch map of TMMBR in the embodiment of the invention;
Fig. 2 B is the message format sketch map of TSTR in the embodiment of the invention;
Fig. 3 is the multimedia terminal intercommunication network configuration diagram in the embodiment of the invention;
Fig. 4 improves the schematic flow sheet of multi-media connection quality method embodiment one for the present invention;
Fig. 5 improves the signaling process figure of multi-media connection quality method embodiment two for the present invention;
Fig. 6 improves another signaling process figure of multi-media connection quality method embodiment two for the present invention;
Fig. 7 improves the another signaling process figure of multi-media connection quality method embodiment two for the present invention;
Fig. 8 improves the signaling process figure of multi-media connection quality method embodiment three for the present invention;
Fig. 9 is the structural representation of medium control device embodiment one of the present invention;
Figure 10 is the structural representation of medium processing device embodiment one of the present invention;
Figure 11 improves the structural representation of multi-media connection quality system embodiment one for the present invention;
Figure 12 improves the schematic flow sheet of multi-media connection quality method embodiment four for the present invention;
Figure 13 improves the schematic flow sheet of multi-media connection quality method embodiment five for the present invention;
Figure 14 is the structural representation of medium control device embodiment two of the present invention;
Figure 15 is the structural representation of medium processing device embodiment two of the present invention;
Figure 16 improves the structural representation of multi-media connection quality system embodiment two for the present invention.
Embodiment
Below through specific embodiment and combine accompanying drawing that the present invention is done further detailed description.
At first the agreement of using in the embodiment of the invention is carried out following brief account.
H.248 agreement is the definition of ITU-T SG16 normal structure, is specifically designed to the agreement of media resource control.Parameter with professional correlation can be polymerized to a bag (Package) in logic, and bag is the method for the Extended Protocol function that provides of agreement H.248.H.248 agreement increases new function through wrapping the function of Extended Protocol in agreement, generally need not revise the agreement body, and only need define new bag.A bag can be regarded the encapsulation of an autonomous behavior as; When medium processing device is claimed this bag of support; Also just equal it and support this characteristic; Medium control device just can use attribute, incident, signal, the statistics of definition in this bag, operates the media resource on the medium processing device, realizes the corresponding service logic.
H.245 agreement is the control protocol of the multimedia communication of ITU-T formulation.H.245 agreement comprises order class message, be used for call setup after, require opposite end certain operation of command execution according to local terminal.Two kinds of following orders are to use in the embodiment of the invention, but are not limited to only use these two kinds of orders to realize the quality information feedback in the communication process in the embodiment of the invention.
1, Flow Control (Flow control) order; After being used for call setup; When the local terminal network quality changes, send this flow-control command of carrying the maximum bit rate parameter and give the opposite end, require the opposite end that certain Media Stream that sends to local terminal or the bit rate of whole multiplex stream are carried out Flow Control; After the opposite end received this order, follow-up Media Stream or the whole multiplex stream that sends to local terminal was to be no more than the maximum bit rate transmission that local terminal limits.
2, miscellaneous (Miscellaneous) order; Wherein comprise many command functions; Having used the video space versus time trade off in embodiments of the present invention orders than (video Temporal Spatial Trade Off); The request of this order for frame per second is upgraded after the opposite end receives this order, will be sent video flowing according to new frame per second.Under the constant situation of transmission rate, can improve the quality of video.As on time shaft, changing less video, can adopt low frame per second high-resolution to transmit for picture; And, can adopt the high frame per second of low resolution to transmit for changing video faster on the image time axle, can reach the effect that improves video quality.
RTP is a kind of RTP that end-to-end transmission service is provided, and is used for being supported in transmitting real-time data in the network service; RTCP Real-time Transport Control Protocol (RTCP) is used to monitor and report the transmission of RTP.A kind of RTCP of utilization amplifying message provides the amplifying message in the mode of video feed information can comprise following two kinds:
1, temporary maximum Media Stream bit rate request (Temporary Maximum Media Stream BitRate Request; Hereinafter to be referred as TMMBR); The message format of employing shown in Fig. 2 A wherein can calculate bandwidth value through MxTBR Exp, MxTBR Mantissa and Measured Overhead;
2, space versus time trade off adopts the message format shown in Fig. 2 B than request (Temporal-Spatial Trade-off Request is hereinafter to be referred as TSTR), and wherein the Index value is 0-31, is used for indicating the value class to frame per second and video quality.The minimum frame per second of 0 expression, high image quality; 31 are the highest frame per second, lowest image quality.
The embodiment of the invention is that the H.324 intercommunication between the multimedia terminal with the IMS multimedia terminal of IMS network side and CS network side is an example, the network architecture as shown in Figure 3.The media data that the embodiment of the invention relates to comprises but is not limited to: data such as audio frequency, video, message.The embodiment of the invention adopts this concrete instance to explain: to the adjustment of the media data after the session foundation of multimedia terminal and the disposal ability of rate adapted, can improve the technical scheme of multi-media connection quality on increase medium control device and the medium processing device.
As shown in Figure 4, the schematic flow sheet for the present invention improves multi-media connection quality method embodiment one comprises the steps:
After step 101, Multimedia session were set up, MGC received H.324 multimedia terminal, i.e. the quality information feedback of first multimedia terminal transmission;
Under the scene of IMS multimedia terminal and H.324 multimedia terminal intercommunication; H.324 following situation may take place in the multimedia terminal; But be not limited to following situation: the bandwidth of access network descends, receives that buffer overflow or underflow, packet loss, video quality are bad etc., and wherein video quality is bad possibly be that frame per second is low excessively, and image is discontinuous; Perhaps frame per second is too high, and is not fogging clear; Therefore; This quality information can include maximum bandwidth request, frame per second and image resolution ratio balance than request, packet loss information, buffer information etc., and this quality information feedback can be ordered than (video Temporal Spatial Trade Off) etc. for Flow Control (Flow control) command request, frame per second and the video space versus time trade off of picture quality;
The source of media end for can to first multimedia terminal (promptly H.324 multimedia terminal) the equipment adjusted of the media data that will receive; Can be for sending another terminal of this media data, i.e. intermediate equipment on second multimedia terminal or the media data transmission path; In embodiments of the present invention, second multimedia terminal is the IMS multimedia terminal, and intermediate equipment is MGW.
When the quality feedback information that MGC receives was situation about being enumerated in the step 101, MGC can specifically carry out following processing:
1, the access network bandwidth when side H.324 descends, H.324 the buffer size of side changes, average received speed changes, when H.324 the packet loss of multimedia terminal receiving media data is crossed high situation and is taken place, MGC will receive Flow Control (Flow control) command request that initiate at terminal H.324:
MGW can be used as the source of media end; If in the session of setting up, have the transcoding device or can insert the transcoding device; The processing procedure that then has two kinds of possible MGC: a kind ofly be; Encoding and decoding speed and/or session bandwidth under the code encoding/decoding mode that adopts in maximum bandwidth of relatively asking in the flow-control command request and the current sessions; When the maximum bandwidth of request in the current sessions bandwidth range, and need not reselect encoding and decoding speed the time, then only notify the encoding and decoding speed of the media data of the opposite end of the transcoding device of MGW through wherein to change once and get final product receiving; Another kind is; Encoding and decoding speed and/or session bandwidth under the code encoding/decoding mode that maximum bandwidth of relatively asking in the flow-control command request and current sessions adopt; When the request maximum bandwidth outside the current sessions bandwidth range; But in the time of need not reselecting encoding and decoding speed, then possibly need trigger with the session bandwidth of multimedia terminal H.324 and consult again; When the maximum bandwidth of request within the current sessions bandwidth range, but need reselect encoding and decoding speed the time, then possibly need to trigger with the encoding and decoding speed of multimedia terminal H.324 and consult again; When the maximum bandwidth of request outside the current sessions bandwidth range, and need reselect encoding and decoding speed the time, then possibly need to trigger and the H.324 session bandwidth of multimedia terminal and/or the negotiation again of encoding and decoding speed; And need the transcoding device of notice MGW through wherein that the media data of the opposite end that receives is carried out the conversion of encoding and decoding speed, to be suitable for session bandwidth and/or the encoding and decoding speed after consulting.Wherein notify the conversion of the encoding and decoding speed of the media data that the transcoding device of MGW through wherein send the IMS side that receives, can be through using existing SDP parameter to transmit at interface H.248, also can transmit relevant parameter through expanding H.248 message.
The IMS multimedia terminal is as the source of media end; But if in the session of setting up, do not have the transcoding device or exist transcoding device transcoding unsuccessful; Encoding and decoding speed and/or session bandwidth under the code encoding/decoding mode that adopts in maximum bandwidth of then asking in the request of MGC comparison flow-control command and the current sessions; If within the current sessions bandwidth range; But in the time of need reselecting encoding and decoding speed, then maybe to the encoding and decoding speed of media data trigger with multimedia terminal H.324 and/or with the negotiation again of IMS multimedia terminal; If outside the current sessions bandwidth range, but need not reselect encoding and decoding speed the time, then possibly trigger to the session bandwidth of media data with multimedia terminal H.324 and/or with the negotiation again of IMS multimedia terminal; If outside the bandwidth range of current sessions, and need reselect encoding and decoding speed the time, then maybe to the session bandwidth of media data and/or encoding and decoding speed trigger with multimedia terminal H.324 and/or with the negotiation again of IMS multimedia terminal.
The IMS multimedia terminal is during as the source of media end; MGC can also extract the maximum bandwidth of asking in the flow-control command request, expands H.248 Indication message, adopts this H.248 Indication message indication MGW encapsulation RTCPTMMBR; And be sent to the IMS multimedia terminal; The IMS multimedia terminal will judge according to the maximum bandwidth parameter that encapsulates among the RTCP TMMBR, if session bandwidth and encoding and decoding speed all in the scope of its support, are then directly adjusted; Otherwise possibly trigger negotiations process again, with the coding of the media data of dynamic its transmission of adjustment.H.248 the signal parameter in the Indication message can be consistent with the parameter in the quality information feedback, perhaps H.248 the signal parameter in the Indication message also can for: in the quality amplifying message that the parameter in the quality information feedback is converted to the parameter that will encapsulate.
2, when MGC receives that the frame per second that sends multimedia terminal is H.324 ordered than (video Temporal Spatial Trade Off) with the video space versus time trade off of picture quality:
If exist the transcoding device maybe can insert the transcoding device in this session; MGC will compare parameter according to the balance that comprises in this order; Notice MGW mails to the H.324 frame per second and the image resolution ratio of the media data of multimedia terminal through transcoding device adjustment wherein, and maybe the frame per second of media data be triggered and the H.324 negotiation again of multimedia terminal; Wherein notify the conversion of the encoding and decoding speed of the media data that the transcoding device of MGW through wherein send the IMS side that receives, can be through using existing SDP parameter to transmit at interface H.248, also can transmit relevant parameter through expanding H.248 message.But, because differing, the adjustment of the media data that send the IMS multimedia terminal through the transcoding device satisfy the requirement of balance surely than parameter, therefore possibly still need adjust from IMS multimedia terminal one side; For example; After can MGC receiving that this video space versus time trade off is than order, to the frame per second of media data trigger with multimedia terminal H.324 and/or with the negotiation again of IMS multimedia terminal, perhaps MGC indicates balance to MGW through the H.248 message of expansion than parameter; Send to the IMS multimedia terminal by MGW through RTCP TSTR message; The IMS multimedia terminal will be judged than parameter according to this balance, if the frame per second of present encoding is then directly adjusted the coding of media data in the scope of its support; Otherwise possibly trigger negotiations process again, thereby dynamically adjust the coding of the media data of its transmission.
The raising multi-media connection quality method that present embodiment provides can be passed through said method, but is not limited to said method, and encoding and decoding speed, the video space versus time trade off of dynamically adjusting media data compare etc., thereby improve multi-media connection quality.For the processing procedure under the above-mentioned multiple situation, will describe this raising multi-media connection quality method in detail through concrete embodiment respectively below.
The network bandwidth descends or disposal ability is not enough when multimedia terminal H.324 detects; When receiving buffer overflow or underflow or packet loss above upper limit threshold; H.324 the multimedia terminal will have Flow Control (Flowcontrol) command request of the maximum bandwidth of request through message H.245 to the MGC/MGW of network side feedback; Require the opposite end of session to reduce session bandwidth and/or encoding and decoding speed, with dynamic adjustment local terminal, i.e. the speech quality of multimedia terminal H.324.
As shown in Figure 5, improve the signaling process figure of multi-media connection quality method embodiment two for the present invention.After Multimedia session is set up; Comprise this transcoding device in the session or when session needs, can insert the transcoding device, at this moment, can carry out transcoding to media data through the transcoding device among the MGW; Thereby the encoding and decoding speed of adjustment media data is to satisfy the maximum bandwidth of asking in the flow-control command request.In this case, if the transcoding device can be accomplished aforesaid operations, concrete steps are following:
Variation has taken place in step 201, the session bandwidth when H.324 the multimedia terminal detects its receiving media data, sends quality information feedback to MGC, and the H.245 flow-control command of promptly sending the maximum bandwidth that has request is to MGC;
As under the situation of Radio Resource anxiety, the bandwidth of at this moment distributing to unique user will descend, and just need reduce the H.324 speed of multimedia terminal receiving media data this moment; Perhaps under the d/d situation of Radio Resource, the bandwidth of at this moment distributing to unique user will rise, and just need improve the H.324 speed of multimedia terminal receiving media data this moment; And this H.245 flow-control command transmit by MGW;
H.245 step 202, MGC return flow-control command response message to multimedia terminal H.324 through MGW;
Wherein MGC adjusts the coding of media data through the transcoding device through message informing MGW H.248; Can be through using the transmission of existing SDP parameter at interface H.248; Also can be through expanding H.248 message transmission relevant parameter, if message transmission extension of message wherein is similar to the expansion that the RTCP feedback is indicated through expanding H.248, difference is to can be used as H.248 by relevant parameter, and attribute transmits; Parameter format is similar, does not give unnecessary details here;
H.245 step 205, MGC send through MGW that Flow Control is indicated to H.324 multimedia terminal, notify H.324 the multimedia terminal to mail to this H.324 the adjustment of the media data of multimedia terminal confirm;
In the present embodiment; The situation of foregoing description is that the maximum bandwidth of H.324 multimedia terminal request is within the scope that H.324 side can be adjusted voluntarily; Therefore need not trigger the MGC and the process of consulting again of multimedia terminal H.324; At this moment, step 205 and step 206 can advance to step 202 place.When if H.324 the maximum bandwidth of multimedia terminal request is not within the scope that side H.324 can be adjusted voluntarily; After above-mentioned steps 202, also will trigger the process of consulting again of MGC and multimedia terminal H.324 so, this process of consulting again will introduction in detail among the embodiment below.
As shown in Figure 6, improve another signaling process figure of multi-media connection quality method embodiment two for the present invention.In MGW, there is not transcoder resource can offer this session; Perhaps can obtain the transcoding device in the session but can not carry out bandwidth adjustment through the transcoding device; Be that transcoding is when unsuccessful; The adjustment of the transmission of media data bandwidth that multimedia terminal is H.324 received also can be through initiating MGC and the H.324 negotiation again of multimedia terminal, and/or with the negotiation again of IMS multimedia terminal.Concrete steps are following:
If the maximum bandwidth of request is not within the encoding and decoding scope that the H.324 side of current sessions is used; Then need initiate MGC consults with the encoding and decoding of multimedia terminal H.324 again; If the maximum bandwidth of request is not within the encoding and decoding scope that the IMS of current sessions side is used; Then need initiate the encoding and decoding of MGC and IMS multimedia terminal consults again; If the maximum bandwidth of request all not within the encoding and decoding scope that H.324 side and IMS side are used, then need be initiated the encoding and decoding on MGC and both sides and consult again; In addition; If the maximum bandwidth of request is within the scope of the encoding and decoding that the H.324 side and/or the IMS side of current sessions are used; When the request maximum bandwidth outside the current sessions bandwidth range; But in the time of need not reselecting encoding and decoding speed, then possibly need to initiate MGC and the H.324 negotiation again of the session bandwidth of multimedia terminal and/or IMS multimedia terminal; When the maximum bandwidth of request within the current sessions bandwidth range, but need reselect encoding and decoding speed the time, then possibly need to initiate MGC and the H.324 negotiation again of the encoding and decoding speed of multimedia terminal and/or IMS multimedia terminal; When the maximum bandwidth of request outside the current sessions bandwidth range, and need reselect encoding and decoding speed the time, then possibly need to initiate MGC and multimedia terminal H.324 and/or with the negotiation again of the session bandwidth and the encoding and decoding speed of IMS multimedia terminal; This step 303 in the present embodiment for the maximum bandwidth of request within the encoding and decoding scope that current sessions uses, but to initiate MGC and the H.324 negotiation again of the encoding and decoding speed between the multimedia terminal and session bandwidth;
For example; Coded system AMR supports a plurality of speed in the 4.75-12.2kb/s scope; When session bandwidth was 6kb/s, session can be used the speed of 5.9kb/s, when the request maximum bandwidth is 10kb/s; Again the consulting session bandwidth is that 10kb/s and code rate are 7.95kb/s, and at this moment coded system still is the AMR mode;
H.245 step 306, MGC send through MGW that Flow Control is indicated to H.324 multimedia terminal, notify this H.324 to accomplish the negotiation again of session bandwidth and/or encoding and decoding speed in the multimedia terminal;
Accomplish the negotiation again of MGC and multimedia terminal H.324 in above-mentioned steps after; If also need hold consultation, with regard to execution in step 308, initiation MGC and the encoding and decoding speed of IMS multimedia terminal one side and/or the negotiation again of session bandwidth with the IMS multimedia terminal.
As shown in Figure 7, improve the another signaling process figure of multi-media connection quality method embodiment two for the present invention.When the maximum bandwidth of asking is within encoding and decoding scope, encoding and decoding speed range and session bandwidth scope that current sessions uses; Do not need the negotiations process again in the foregoing description; At this moment, can pass through this embodiment, expand H.248 Indication message at the H.248 interface of MGC and MGW; Indication MGW sends RTCP quality amplifying message, like RTCP TMMBR message.MGC detects H.245 flow-control command request, indication MGW, and MGW gives the IMS multimedia terminal through RTCP TMMBR feedback quality information, and the IMS multimedia terminal will be according to the transmission of the control of the parameter among RTCP TMMBR media data.
H.248 the Indication message of this expansion; It can be the expansion of carrying out through signal H.248; The signal parameter that defines in the H.248 signal of this expansion includes but not limited to: consistent with the parameter in the flow-control command request H.245; Perhaps MGC changes the parameter in the flow-control command request H.245, and the signal parameter that is carried in the signal H.248 is consistent with parameter among the RTCP TMMBR.Promptly H.245 the parameter in the flow-control command request and the conversion of the parameter among the RTCP TMMBR can be carried out also can being accomplished by MGC at MGW.
H.248 the signal of expansion is following:
Signal name: RTCP feedback Indication (RTCP feeds back indication)
Signal parameter:
Parameter 1:MBR
Parameter I D:0x01
Describe: be used for the maximum bandwidth of indication request, the 100bit/s of unit
Type: integer
The concrete steps that present embodiment improves the multi-media connection quality method are following:
This H.248 the maximum bandwidth parameter in the signal can be exactly the parameter in the H.245 flow-control command request, also can convert the parameter that can in the RTCP amplifying message, carry at this; Or be different from this parameter of above two kinds format description.
After step 404, MGW receive this index signal; If in step 403, do not carry out the conversion of parameter; Then the signal parameter that H.248 this carry in index signal is changed at this; Convert carry-on parameter in the RTCP amplifying message into, promptly constitute the RTCP amplifying message, be i.e. TRCP TMMBR;
H.245 step 407, MGC send through MGW that Flow Control is indicated to H.324 multimedia terminal, notify this H.324 to accomplish the transmission of indication IMS multimedia terminal control media data in the multimedia terminal;
Step 407 in the present embodiment and step 408 also can realize at step 402 place.
The present invention improves multi-media connection quality method embodiment two, describes three kinds of modes that can improve multimedia terminal speech quality in detail, has increased the Signalling exchange between MGC and the MGW, can dynamically improve multi-media connection quality in several ways.
As shown in Figure 8, improve the signaling process figure of multi-media connection quality method embodiment three for the present invention.H.324 it is bad that the multimedia terminal detects its video quality, and main cause is, when the improper institute of frame per second and picture quality causes; For example; Under the certain situation of bandwidth,, require the frame per second can not be too low for the fierce picture of video content motion; Just need to select high frame per second, low image quality guarantees communication quality; And be tending towards under the situation of static state for video content, hope to adopt low frame per second, high picture quality, user's impression at this moment is better.At this moment; H.324 the multimedia terminal can be according to the picture situation of being seen for this; Send the video space versus time trade off than order to MGC; H.324 MGC can mail to than the adjustment of the transcoding device in the parameter announcement session according to the balance in this order, and the frame per second and the image resolution ratio of the media data of multimedia terminal also possibly trigger and the H.324 negotiation again of multimedia terminal to the frame per second of media data; Also can be after MGC receive that this video space versus time trade off is than order, to the frame per second of media data trigger with multimedia terminal H.324 and/or with the negotiation again of IMS multimedia terminal, thereby the frame per second that media data is sent in adjustment IMS multimedia terminal; Should through the transcoding device and/or initiate frame per second consult again carry out the processing procedure that MGC in similar the foregoing description of adjustment process of media data receives flow-control command, repeat no more at this.In addition, can also expanding H.248 to MGC, Indication message indication MGW notice IMS multimedia terminal specifically describes as follows with the balance ratio of frame per second with the image resolution ratio of adjustment media data:
H.248 the signal of expansion is:
Signal name: RTCP feedback Indication (RTCP feeds back indication)
Signal parameter:
Parameter 2:TSTR
Parameter I D:0x02
Describe: be used for indicating the balance ratio request of frame per second and picture material, span 0～31, wherein 0 representes minimum frame per second, best picture, the highest frame per second of 31 expressions, relatively poor image quality.
Type: integer
The balance that receives frame per second and picture material as MGC is than request; When promptly H.245 the video space versus time trade off is ordered than (video Temporal Spatial Trade Off); Expand H.248 Indication message; Here be signal H.248, indication MGW will weigh than parameter through RTCP amplifying message TSTR and feed back to the IMS multimedia terminal, and the IMS multimedia terminal will be controlled the transmission of media data according to the balance of frame per second and picture material than parameter.Concrete steps are following:
H.245 step 502, MGC return the video space versus time trade off than command response message through MGW;
This H.248 the balance in the signal can be exactly the parameter in the H.245 flow-control command request than parameter, also can this convert into the RTCP amplifying message in parameter consistent, or be different from other parameters of above two types of parameters;
After step 504, MGW receive this index signal; If in step 403, do not carry out the conversion of parameter; Then the signal parameter that H.248 this carry in index signal is changed, converted into carry-on parameter among the RTCP amplifying message RTCP TSTR, promptly constitute RTCP TSTR at this;
Step 507 in the present embodiment and step 508 also can realize at step 502 place.
In the present embodiment; MGC can also mail to the H.324 frame per second and the image resolution ratio of the media data of multimedia terminal than the adjustment of the transcoding device in the parameter announcement session according to the balance in this order; Wherein MGC can be through using the transmission of existing SDP parameter at interface H.248 through the transcoding device through message informing MGW H.248; Also can transmit relevant parameter through expanding H.248 message, if through expanding the expansion that message transmission extension of message wherein H.248 is similar to the indication of RTCP feedback, difference be relevant parameter can also conduct H.248 attribute transmit; Parameter format is similar, does not give unnecessary details here.
The present invention improves multi-media connection quality method embodiment three; Describe the mode that improves multimedia terminal speech quality through the relation of regulating frame per second and picture quality in detail; MGW sends the RTCP amplifying message to the IMS network side through the MGC indication; By IMS multimedia terminal adjustment frame per second, thereby dynamically improve multi-media connection quality.
As shown in Figure 9, be the structural representation of medium control device embodiment one of the present invention.This medium control device comprises: after Multimedia session is set up; Receive first receiver module 11 of the quality information feedback of sending first multimedia terminal, said quality information is maximum bandwidth request, frame per second and the request of image resolution ratio balance ratio, packet loss information, buffer information; And according to quality information feedback, first indicating module 12 of the media data of first multimedia terminal is sent in the adjustment of indication source of media end.
Wherein, This first indicating module 12 can comprise: according to the parameter in the quality information feedback; The transcoding device adjustment of notice medium processing device through wherein is sent to the notice submodule 121 of the media data of first multimedia terminal, and this moment, the source of media end was medium processing device; Relatively in the quality information feedback with parameter and the comparison sub-module 122 of the relevant parameter in the current sessions; Trigger with first multimedia terminal and/or with the negotiation again of second multimedia terminal, send to the triggering submodule 123 of the media data of first multimedia terminal with adjustment, the source of media end of this moment is second multimedia terminal.
This first indicating module 12 can also comprise: extract the parameter in the quality information feedback, expand the H.248 expansion submodule 124 of Indication message; Adopt H.248 Indication message indication medium processing device package quality amplifying message; And send its indication submodule 125 to second multimedia terminal; Wherein, H.248 the signal parameter in the Indication message includes but not limited to: consistent with the parameter in the quality information feedback, perhaps in the quality amplifying message that the parameter in the quality information feedback is converted to the parameter that will encapsulate.
After medium control device in the present embodiment receives the quality information feedback from the multimedia terminal, and described in mutual detailed process between medium processing device and the multimedia terminal such as the above-mentioned raising multi-media connection quality method, repeat no more here.This medium control device compares parameter in the quality information feedback and the relevant parameter in the current sessions; And then the transcoding device in the notice medium processing device is dynamically adjusted the encoding and decoding speed and the session bandwidth of media data; Perhaps come dynamically the encoding and decoding speed and the session bandwidth of adjustment media data through the negotiation that triggers medium control device and multimedia terminal; Perhaps through the H.248 Indication message between extended medium control appliance and the medium processing device; Send the quality amplifying message by medium control device indication medium processing device and come dynamically the encoding and decoding speed and the session bandwidth of adjustment media data, thereby improve multi-media connection quality.
Shown in figure 10, be the structural representation of medium processing device embodiment one of the present invention.This medium processing device comprises: according to the notice of medium control device, adjustment is sent to the transcoding device 21 of the media data of first multimedia terminal; And/or when receiving the H.248 Indication message of medium control device; Signal parameter in the direct H.248 Indication message is encapsulated in the quality amplifying message; Be sent to second multimedia terminal; Perhaps will be H.248 signal parameter in the Indication message convert in the quality amplifying message the parameter that will encapsulate, and be packaged into the modular converter 22 of quality amplifying message.
After medium processing device in the present embodiment receives the indication from medium control device, and described in mutual detailed process between medium control device and the multimedia terminal such as the above-mentioned raising multi-media connection quality method, repeat no more here.This medium processing device through and medium control device and multimedia terminal between mutual, can in time handle, thereby dynamically improve multi-media connection quality the indication of medium control device.
Shown in figure 11, improve the structural representation of multi-media connection quality system embodiment one for the present invention.This raising multi-media connection quality system comprises: send first multimedia terminal 3 of quality information feedback, this quality information is maximum bandwidth request, frame per second and the request of image resolution ratio balance ratio, packet loss information, buffer information; According to quality information feedback, send notice, indication or trigger negotiation again, send to the medium control device 1 of the media data of first multimedia terminal 3 with adjustment; After receiving the notice or indication that medium control device sends, the source of media end of the media data of first multimedia terminal 3 is sent in adjustment.
Wherein, medium control device 1 can comprise: after Multimedia session is set up, receive first receiver module 11 of the quality information feedback of sending first multimedia terminal 3; According to quality information feedback, first indicating module 12 of the media data of first multimedia terminal 3 is sent in the adjustment of indication source of media end.
The source of media end can be the medium processing device 2 or second multimedia terminal 4; When the source of media end is medium processing device 2; Will comprise the notice of sending according to first indicating module 12 in the medium control device 1 in the medium processing device 2, adjustment is sent to the transcoding device 21 of the media data of first multimedia terminal 3; When the source of media end is second multimedia terminal 4; Can comprise in the medium processing device 2 when receiving the H.248 Indication message of medium control device 1; Directly H.248 the signal parameter in the Indication message is encapsulated in the quality amplifying message, is sent to second multimedia terminal 4, perhaps H.248 the signal parameter in the Indication message convert in the quality amplifying message the parameter that will encapsulate; And be packaged into the modular converter 22 of quality amplifying message; At this moment, second multimedia terminal 4 is according to the quality amplifying message that receives, and adjustment is sent to the media data quality of first multimedia terminal 3.
Raising multi-media connection quality system in the present embodiment; Described in the concrete implementation procedure of the multiple interactive mode between medium control device, medium processing device and first, second multimedia terminal such as the above-mentioned raising multi-media connection quality method, repeat no more here.This raising multi-media connection quality system can handle it to the information quality feedback of multimedia terminal timely, thereby dynamically improve multi-media connection quality through having increased the protocol interaction between medium control device and the medium processing device.
Shown in figure 12, the schematic flow sheet for the present invention improves multi-media connection quality method embodiment four comprises the steps:
After step 601, Multimedia session were set up, MGC indication MGW detected the media data that the media data transmit leg is sent, and confirms to detect the mass parameter of media data;
Session before the step 601 is set up in the process, and what MGC will confirm earlier whether MGW realize is the medium encoding and decoding between different source of media, like mixing of meeting video or audio frequency and video transcoding; MGC need to confirm the mass parameter of the media data that MGW detects, and indication MGW detects the quality of the media data that the media data transmit leg sends;
When quality that MGW detects the media data that the media data transmit leg sends drops under the mass parameter grade of MGC regulation, can report quality problems information to MGC, wherein carried the parameter information that addresses this problem; The quality problems information that MGC reports according to MGW; Can send feedback information to media data transmit leg; By the again negotiations process of media data transmit leg triggering with MGC, the media data so that adjustment media data transmit leg sends also can send feedback information to media data transmit leg; And by the again negotiations process of MGC triggering with the media data transmit leg; The media data that sends with adjustment media data transmit leg can also directly trigger the negotiations process again with the media data transmit leg by MGC, to adjust the media data of media data transmit leg transmission.Thereby the media data that the media data transmit leg sends can dynamically be adjusted.
The raising multi-media connection quality method that present embodiment provides, the setting and the examination criteria of credit rating determine by media controller, maybe but be not limited to the network bandwidth and descend; Perhaps disposal ability is not enough, receives buffer overflow or underflow; It is high excessively perhaps to detect packet loss.Present embodiment is that therefore, medium control device is MGC under the scene of IMS multimedia terminal shown in Figure 3 and H.324 multimedia terminal intercommunication, and medium processing device is MGW.Present embodiment also can be applied under the scene between a plurality of multimedia terminals in the consolidated network.
The raising multi-media connection quality method that present embodiment provides; Through medium processing device in the process of participating in encoding and decoding and media delivery; Can dynamically detect the quality of the media data that the media data transmit leg sends, and when quality descends, with quality problems information notice medium control device; Can send feedback information to the media data transmit leg by medium control device; Directly adjust media data by the media data transmit leg, perhaps trigger negotiations process again, also can directly trigger and the negotiations process again of media data transmit leg by medium control device with the adjustment media data; Can also not only send feedback information but also trigger the negotiations process again with the media data transmit leg by medium control device, thereby the media data that the media data transmit leg sends can dynamically be adjusted.
Shown in figure 13, the schematic flow sheet for the present invention improves multi-media connection quality method embodiment five is the handling process of buffering area detection.For the H.324 detection of the buffer information of side among the MGW, MGW self can carry out the H.324 adjustment of the buffering area of multimedia terminal one side, adapts to the H.324 variation of the media data of multimedia terminal transmission; But; When the influence that the variation of the media data that sends when multimedia terminal H.324 produces buffering area has exceeded the adjusting range of MGW; MGW in the present embodiment just need report these quality problems to give MGC; Send H.245 the mode of flow-control command through MGC and come to multimedia terminal H.324, i.e. the bandwidth of the media data flow that sends is revised in media data transmit leg request, to accomplish the dynamic adjustment of conversation procedure.
Carry out the detection of buffer information for MGC can indicate MGW, define as follows H.248 incident:
Detect the media quality incident
Event name: media quality incident
Event detection parameter: do not have
The testing result parameter:
Parameter 1:mb (maximum bandwidth)
Parameter I D:0x01
Describe: MGW has certain regulating power according to the average received speed of media data to its buffering area; Self regulate or expection will exceed the adjustable range of self time when exceeding; To initiate Flow Control to multimedia terminal H.324, adjust the source of media end, be i.e. the bandwidth of the media data of multimedia terminal H.324; To satisfy the H.324 quality requirement of multimedia terminal, the 100bit/s of unit
Type: integer
When being given in the CS network side below and H.324 conversing between the IMS multimedia terminal of multimedia terminal and IMS network side, MGC/MGW carries out the instance that buffering area detects, and comprises the steps:
For example be about to overflow when buffering area, and Mean Speed is when being v1 that MGW will advise a rate value less than v1; Buffering area is about to underflow else if, with rate value that is higher than v1 of suggestion;
MGW carries out reporting of quality testing and quality problems information can also trigger MGC to H.324 H.245 shake indication (jitter Indication) of multimedia terminal transmission.The H.248 incident of expansion MGC with trigger MGC and send the trigger process of step 701～step 707 pair Flow Control command messages in similar the foregoing description of process of H.245 shake indication to multimedia terminal H.324.H.324 the multimedia terminal receives after H.245 this shake indication (jitter Indication); Can also send H.245 flow-control command (FlowControl Command) request; Trigger the flow control procedure of a new round, after promptly H.324 feedback information is received in the multimedia terminal, trigger negotiations process again with MGC; Similar with the negotiations process again of above-mentioned detailed introduction, repeat no more here.
When the media data transmit leg that sends media data is the IMS multimedia terminal, can pass through the RTCP message feedback for the media quality detection feedback of IMS multimedia terminal one side and realize.If carry out the modification of media data transmission bandwidth, can trigger Flow Control through RTCP TMMBR message feedback; If also need carry out the negotiation again of encoding and decoding or relevant parameter, relevant negotiation again can be triggered in the IMS multimedia terminal after receiving RTCP message.
Shown in figure 14, be the structural representation of medium control device embodiment two of the present invention.This medium control device comprises: after Multimedia session was set up, the indication medium processing device detected the media data that the media data transmit leg is sent, and confirmed second indicating module 61 of the mass parameter of detection media data; Second receiver module 62 of the quality problems information that the receiving media treatment facility reports; According to quality problems information, indication media data transmit leg, the 3rd indicating module 63 of the media data that sends with adjustment media data transmit leg.The quality problems information that reports according to MGW of MGC wherein; Can send feedback information to media data transmit leg; By the again negotiations process of media data transmit leg triggering with MGC, the media data so that adjustment media data transmit leg sends also can send feedback information to media data transmit leg; And by the again negotiations process of MGC triggering with the media data transmit leg; The media data that sends with adjustment media data transmit leg can also directly trigger the negotiations process again with the media data transmit leg by MGC, to adjust the media data of media data transmit leg transmission.
The function of each module of the medium control device that present embodiment provides realizes like the detailed description in the above-mentioned raising multi-media connection quality method.This medium control device can carry out reporting of quality testing and qualitative data through the indication medium processing device, with the quality feedback of triggering to the media data transmit leg, thereby improves the multimedia calling quality.
Shown in figure 15, be the structural representation of medium processing device embodiment two of the present invention.This medium processing device comprises: in the receiving media data process, and the mass parameter of the detection media data of confirming according to medium control device, the computing module 71 that media data is calculated; When calculating is found himself can't adjust media data, with the reporting module 72 of quality problems information reporting to the medium control device that calculates.
The function of each module of the medium processing device that present embodiment provides realizes like the detailed description in the above-mentioned raising multi-media connection quality method.This medium processing device can carry out quality testing according to the indication of medium control device, and qualitative data is reported medium control device, with the quality feedback of triggering medium control device to the media data transmit leg, thereby improves the multimedia calling quality.
Shown in figure 16, improve the structural representation of multi-media connection quality system embodiment two for the present invention.This system comprises: send media data, and according to the media data transmit leg 5 again consulted of the feedback information triggering that receives with medium control device 7, medium processing device 7, and medium control device 6.
Wherein, media data transmit leg 5 is used for after Multimedia session is set up, sending media data, and according to the again negotiation of the feedback information triggering that receives with medium control device.
The function of each module of the raising multi-media connection quality system that present embodiment provides realizes like the detailed description in the above-mentioned raising multi-media connection quality method.This improves the multi-media connection quality system; Medium processing device can be according to the indication of medium control device; The media data that the media data transmit leg is sent carries out quality testing; And qualitative data is reported medium control device,, thereby improve the multimedia calling quality with the quality feedback of triggering medium control device to the media data transmit leg.
Need to prove; The embodiment of the invention is not limited under the network architecture shown in Figure 3; Be in the conversation with different multimedia terminal under the network or the different multimedia terminal under the heterogeneous networks for some other; When improving speech quality, the technical scheme of the embodiment of the invention also is suitable for.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (5)
1. one kind is improved the multi-media connection quality method, it is characterized in that, comprising:
Medium control device receives the quality information feedback that send first multimedia terminal;
According to said quality information feedback, the media data of said first multimedia terminal is sent in the adjustment of indication source of media end;
Second multimedia terminal is as said source of media end, and is then said according to said quality information feedback, and the media data that said first multimedia terminal is sent in the adjustment of indication source of media end comprises:
Extract the parameter in the said quality information feedback, in order to expand H.248 Indication message; Construct the quality amplifying message and send it through the indication of the H.248 Indication message after expansion medium processing device to said second multimedia terminal; The media data of said first multimedia terminal is sent in said second multimedia terminal according to the information in said quality amplifying message adjustment; Perhaps
Parameter in the more said quality information feedback and the relevant parameter in the current sessions; According to comparative result trigger said medium control device and said first multimedia terminal and/or with the negotiation again of said second multimedia terminal, send to the media data of said first multimedia terminal with adjustment.
2. raising multi-media connection quality method according to claim 1 is characterized in that, the said negotiation again comprises: encoding and decoding are consulted again, encoding and decoding speed is consulted again, session bandwidth is consulted again, frame per second is consulted again.
3. according to the arbitrary described raising multi-media connection quality method of claim 1-2, it is characterized in that, the video space versus time trade off that said quality information feedback comprises flow-control command request, frame per second and picture quality than at least a.
4. a medium control device is characterized in that, comprising:
First receiver module is used to receive the quality information feedback that send first multimedia terminal, the video space versus time trade off that said quality information feedback comprises flow-control command request, frame per second and picture quality than at least a;
First indicating module is used for according to said quality information feedback, and the media data of said first multimedia terminal is sent in the adjustment of indication source of media end, and said source of media end is second multimedia terminal;
Said first indicating module comprises:
Comparison sub-module is used for the parameter of more said quality information feedback and the relevant parameter in the current sessions;
Trigger submodule; Be used for comparative result according to the output of said comparison sub-module trigger said medium control device and said first multimedia terminal and/or with the negotiation again of said second multimedia terminal, send to the media data of said first multimedia terminal with adjustment; Perhaps
Said first indicating module comprises:
The expansion submodule is used for extracting the parameter of said quality information feedback, expands H.248 Indication message;
The indication submodule is used for constructing the quality amplifying message and sending it to said second multimedia terminal through the indication of the H.248 Indication message after expansion medium processing device.
5. one kind is improved the multi-media connection quality system, comprises first multimedia terminal, second multimedia terminal, it is characterized in that, also comprises:
Medium control device as claimed in claim 4;
Medium processing device; Be used for H.248 Indication message according to said medium control device transmission; Structure quality amplifying message also sends it to said second multimedia terminal, so that the media data of said first multimedia terminal is sent in said second multimedia terminal according to the information in said quality amplifying message adjustment.
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| CN200810168488.3A CN101686178B (en) | 2008-09-28 | 2008-09-28 | Method and system for improving multi-media connection quality, media control and processing equipment |
| ES09726792T ES2389688T3 (en) | 2008-03-31 | 2009-03-24 | Multimedia gateway, multimedia gateway controller, method and system for multimedia phone communication |
| PCT/CN2009/070962 WO2009121272A1 (en) | 2008-03-31 | 2009-03-24 | Media gateway, media gateway controller, method and system for communication of multimedia phones |
| EP09726792A EP2264959B1 (en) | 2008-03-31 | 2009-03-24 | Media gateway, media gateway controller, method and system for communication of multimedia phones |
| PCT/CN2009/073618 WO2010037293A1 (en) | 2008-09-28 | 2009-08-28 | Method and system for improving quality of multimedia calls, media controlling equipment and media processing equipment |
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| CN101154970A (en) * | 2006-09-30 | 2008-04-02 | 中兴通讯股份有限公司 | Method for power control based on service quality |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051860A (en) * | 2012-12-27 | 2013-04-17 | 中兴通讯股份有限公司 | Video refreshing method, device, media gateway control equipment and media processing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010037293A1 (en) | 2010-04-08 |
| CN101686178A (en) | 2010-03-31 |
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