CN103220258B - Meeting sound mixing method, terminal and Media Resource Server - Google Patents
Meeting sound mixing method, terminal and Media Resource Server Download PDFInfo
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- CN103220258B CN103220258B CN201210018793.0A CN201210018793A CN103220258B CN 103220258 B CN103220258 B CN 103220258B CN 201210018793 A CN201210018793 A CN 201210018793A CN 103220258 B CN103220258 B CN 103220258B
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Abstract
The present invention provides a kind of meeting sound mixing method, terminal and Media Resource Server, method includes: send VoP to Media Resource Server MRS, the energy value of carried terminal in described VoP, described energy value is for identifying the local voice volume of described terminal；Receiving the described MRS efficient voice packet of described terminal self correspondence sent, described efficient voice packet is the VoP that the speech data of the maximum predetermined number of the described MRS volume selected from all VoPs received is corresponding；The efficient voice packet of self correspondence of described terminal is carried out stereo process.Terminal includes the first sending module, the first receiver module and mix module.Media Resource Server includes the second receiver module, selects module and the 3rd sending module.Present invention substantially reduces the consumption of network transmission bandwidth between UE and MRS.
Description
Technical field
The present invention relates to communication technology, particularly relate to a kind of meeting sound mixing method, terminal and Media Resource Server.
Background technology
RTP (Real-timeTransferProtocol；Hereinafter referred to as: RTP) provide the end-to-end transfer service with real-time characteristic for data, such as the interactive video under multicast or unicast network services, audio frequency or analog data.It addition, application program is also at User Datagram Protocol (UserDatagramProtocol；Hereinafter referred to as: run RTP on UDP), in order to use multichannel node and verification service.RTP and UDP has been provided which the function of transport layer protocol, but RTP can use together with other bottom-layer networks being suitable for or host-host protocol；And if bottom-layer network provides multicast mode, then RTP can use this multicast table to transmit data to multiple destination.RTP, as a kind of network transmission protocol, is widely used in audio and videoconference.
In meeting audio mixing scheme in the prior art, Fig. 1 is the scene schematic diagram of meeting sound mixing method in prior art, as it is shown in figure 1, each terminal (UserEquipment；Hereinafter referred to as: UE) voice flow of oneself is issued Media Resource Server (MediaResourceServer；Hereinafter referred to as: MRS), namely the voice flow of oneself is sent to MRS by UEA, UEB, UEC, UED respectively；The voice flow of all terminals except each terminal self is handed down to each terminal by MRS, and terminal receives in meeting after the voice of other members, plays after this locality completes audio mixing, and namely the voice flow of UEB, UEC and UED is issued UEA, UEA broadcasting after local audio mixing by MRS；The voice flow of UEA, UEC and UED is issued UEB, UEB and is play after local audio mixing by MRS；The voice flow of UEA, UEB and UED is issued UEC, UEC and is play after local audio mixing by MRS；The voice flow of UEA, UEB and UEC is issued UED, UED and is play after local audio mixing by MRS.Meeting audio mixing scheme of the prior art is without being decoded voice medium and encoding, and the performance consumption of server is less.
But, can be seen that from above-mentioned Fig. 1, it is assumed that the bandwidth of single channel voice is w, if there being N side member to add meeting, the network transmission bandwidth then consumed between UE and server is N*N*w, it is seen then that the meeting audio mixing scheme of the prior art network transmission bandwidth consumption between UE and server is very big.
Summary of the invention
The first aspect of the invention is to provide a kind of meeting sound mixing method, including:
Sending VoP, the energy value of carried terminal in described VoP to Media Resource Server MRS, described energy value is for identifying the local voice volume of described terminal；
Receiving the described MRS efficient voice packet of described terminal self correspondence sent, described efficient voice packet is the VoP that the speech data of the maximum predetermined number of the described MRS volume selected from all VoPs received is corresponding；
The efficient voice packet of self correspondence of described terminal is carried out stereo process.
Another aspect of the present invention is to provide a kind of meeting sound mixing method, including:
Receiving the VoP that each terminal sends respectively, carry the energy value of described each terminal in each described VoP respectively, each described energy value is respectively used to identify the local voice volume of described each terminal；
From described each VoP, the VoP that the speech data of the maximum predetermined number of volume is corresponding is selected, as efficient voice packet according to described each energy value；
The efficient voice packet corresponding with described each terminal is separately sent to described each terminal, is carried out stereo process by described each terminal respectively.
An additional aspect of the present invention is to provide a kind of terminal, including:
First sending module, for sending VoP, the energy value of carried terminal in described VoP to Media Resource Server MRS, described energy value is for identifying the local voice volume of described terminal；
First receiver module, for receiving the described MRS efficient voice packet of described terminal self correspondence sent, described efficient voice packet is the VoP that the speech data of the maximum predetermined number of the described MRS volume selected from all VoPs received is corresponding；
Mix module, for carrying out stereo process to the efficient voice packet of self correspondence of described terminal.
Another aspect of the invention is to provide a kind of Media Resource Server, including:
Second receiver module, for receiving the VoP that each terminal sends respectively, carries the energy value of described each terminal respectively in each described VoP, each described energy value is respectively used to identify the local voice volume of described each terminal；
Selecting module, the VoP that speech data for selecting the maximum predetermined number of volume from described each VoP according to described each energy value is corresponding, as efficient voice packet；
3rd sending module, for the efficient voice packet corresponding with described each terminal is separately sent to described each terminal, is carried out stereo process by described each terminal respectively.
The solution have the advantages that: by sending the VoP of the energy value carrying UE to MRS, and receive the efficient voice packet of MRS UE self correspondence returned, efficient voice packet is the VoP of the MRS maximum predetermined number of volume selected, and the efficient voice packet of UE self correspondence is carried out stereo process；The present embodiment only issues efficient voice packet to UE, compared with prior art, greatly reduces the consumption of network transmission bandwidth between UE and MRS.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the scene schematic diagram of meeting sound mixing method in prior art；
Fig. 2 is the flow chart of meeting sound mixing method embodiment one of the present invention；
Fig. 3 is the structural representation of RTP head in meeting sound mixing method embodiment one of the present invention；
Fig. 4 is the cascade scene schematic diagram of meeting sound mixing method embodiment one of the present invention；
Fig. 5 is the common scenarios schematic diagram of meeting sound mixing method embodiment one of the present invention；
Fig. 6 is the flow chart of meeting sound mixing method embodiment two of the present invention；
Fig. 7 is the signaling diagram of meeting sound mixing method embodiment three of the present invention；
Fig. 8 is the signaling diagram of meeting sound mixing method embodiment four of the present invention；
Fig. 9 is the scene schematic diagram of meeting sound mixing method embodiment four of the present invention；
Figure 10 is the signaling diagram of meeting sound mixing method embodiment five of the present invention；
Figure 11 is the structural representation of terminal embodiment one of the present invention；
Figure 12 is the structural representation of terminal embodiment two of the present invention；
Figure 13 is the structural representation of Media Resource Server embodiment one of the present invention；
Figure 14 is the structural representation of Media Resource Server embodiment two of the present invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Fig. 2 is the flow chart of meeting sound mixing method embodiment one of the present invention, as in figure 2 it is shown, the invention provides a kind of meeting sound mixing method, technical scheme is illustrated by the present embodiment from terminal side, and the present embodiment can specifically include following steps:
Step 201, sends VoP, the energy value of carried terminal in described VoP to MRS, and described energy value is for identifying the local voice volume of described terminal.
Each UE that this step is in meeting sends VoP to MRS, and the form of this VoP is RTP form, carries the energy value of each UE in this VoP respectively, and this energy value is for identifying the local voice volume of UE.The present embodiment can extend a field in the VoP of this RTP form, is carried by the energy value of UE and is sent to MRS in this extended field.
Specifically, the energy value in the present embodiment carries in the extended field arranged in the packet header of described VoP.Fig. 3 is the structural representation of RTP head in meeting sound mixing method embodiment one of the present invention, as it is shown on figure 3, the VoP in the present embodiment all adopts the message structure of Real-time Transport Protocol, the RTP bag in described below is VoP.Wherein, source (ContributingSource is participated in；Hereinafter referred to as: field CSRC) identifying (identifiers) list is optional, only occurs when blender inserts.Wherein, version (V) field accounts for 2, for identifying the version of RTP.Filling mark (P) field and account for 1, as arranged filler, then will comprise additional filler word at bag tail, it is not belonging to payload；Last octal system filled comprises the octal representation ignored；Some AES needs the filling word of fixed size, or for carry several RTP bag in underlying protocol data cell.Extension (X) field accounts for 1, and as arranged extension bits, fixing head heel one head extends.CSRC counts (CC) field and accounts for 4, and CSRC counting includes the number of CSRC identifier after fixing head.Labelling (M) field accounts for 1, and labelling is explained by arranging definition, it is therefore intended that allow critical event to be marked in packet stream；Other indicate positions to arrange definable, or specify do not have marker bit by changing bit quantity.Load type (PT) field accounts for 7, and the data below that records uses which kind of encoder (Codec), and receptor (receiver) end is found out corresponding decoder (decoder) and is decoded.Series number (sequencenumber) accounts for 16, and series number increases by 1 with each RTP bag, recipient be used for detection packet loss；Series number initial value is random, makes the text attack to encryption more difficult.Markers (timestamp) accounts for 32, the sampling instant of first octal number in markers reflection RTP packet, and sampling instant must be derived from dull, linearly increasing clock, to allow to synchronize and Jitter Calculation.Markers can allow receiver end know and data be played back in the correct time.Synchronisation source (SynchronizationSource；Hereinafter referred to as: SSRC) identifier (identifier) field accounts for 32, is used for identifying synchronisation source；This mark does not randomly choose, it is therefore intended that make same RTP bag not have two synchronisation sources to have identical SSRC mark in connecting；Although the probability that multiple sources select same mark is very low, all RTP realize detecting and to solve conflict；Such as transmission address, change source, source, it is also necessary to select a new SSRC to identify to avoid inserting into belt source.CSRCidentifiers list field accounts for 0 to 15, each 32；CSRCidentifiers list represents the source that load is worked in bag；Mark quantity is provided by CC field；As acted on source beyond 15, also only identify 15；CSRC mark is inserted by blender, the SSRC mark in employing effect source.The present embodiment arranges extension bits in the packet header of each RTP bag, wherein, P field is set to 1, representing that this message structure needs extension, the value filling (padding) field is 3, i.e. padding=3, represent that 3 bytes before this field are extension bits, two bytes before padding field are RTP bag needs volume (loud) field that is extended, and this loud field, from 0, maximum can identify 256*256*256 volume difference.Namely in the present embodiment, the energy value of each UE is carried in the extended field loud in RTP packet header in figure 3, be sent to MRS.
Step 202, receiving the described MRS efficient voice packet of described terminal self correspondence sent, described efficient voice packet is the VoP that the speech data of the maximum predetermined number of the described MRS volume selected from all VoPs received is corresponding.
Each UE is after having sent VoP to MRS, and each UE receives the efficient voice packet of MRS each UE self correspondence sent respectively.Namely in the present embodiment, MRS is not its all VoPs except the VoP of each UE self received to each UE VoP sent, and only sends the efficient voice packet of self correspondence of each UE.Wherein, efficient voice packet is the VoP that the speech data of the maximum predetermined number of the MRS volume selected from all VoPs received is corresponding, predetermined number herein can be determined according to practical situation, as being set to 2, then VoP corresponding to MRS selects volume maximum from all VoPs received two-way speech data is as efficient voice packet.Efficient voice packet corresponding with each UE self herein is the efficient voice packet in the MRS effective data packets selected except the VoP of UE self.Such as, assume that UEA, UEB and UEC send respective VoP RTP1, RTP2 and RTP3 to MRS respectively, the energy value carried in RTP1, RTP2 and RTP3 respectively 2db, 5db and 8db, the effective data packets that MRS selects is RTP2 and RTP3, then MRS only issues RTP2 and RTP3 to UEA, only issue RTP3 to UEB, only issue RTP2 to UEC.
Further, in the present embodiment, owing to realizing meeting sound mixing function in terminal, MRS only does the forwarding of packet, VoP need not be decoded and coded treatment, therefore the performance consumption of MRS is little, such that it is able to support that Large Copacity ability can support Large Copacity meeting, namely the present embodiment can support the scene of MRS cascade.When there is cascade MRS, the above-mentioned steps 202 in the present embodiment can particularly as follows: receive the efficient voice packet of described terminal self correspondence that end level MRS sends in described cascade MRS；Wherein, described efficient voice packet be in cascade MRS top MRS according to each energy value, the VoP that the speech data of the predetermined number that the volume that selects from each subordinate MRS of described top MRS VoP sent is maximum is corresponding；In described cascade MRS, MRS at different levels are respectively by VoP corresponding for the speech data of predetermined number maximum for volume in the subordinate MRS of the described each MRS the received VoP sent, and are sent to the higher level MRS of described each MRS.Specifically, VoP is sent to VoP corresponding to two-way speech data that end level MRS in cascade MRS, end level MRS select volume maximum from the VoP received as efficient voice packet at the corresponding levels by each UE；Efficient voice packet at the corresponding levels is sent to its higher level MRS by end level MRS, this higher level MRS, from each subordinate MRS of its correspondence received VoP sent, selects the VoP that the maximum two-way speech data of volume is corresponding as efficient voice packet at the corresponding levels；If there is multistage MRS, then by that analogy, by subordinate MRS, the efficient voice packet at the corresponding levels selected is sent to its higher level MRS successively, until top MRS in cascade MRS.Top MRS, after receiving its subordinate MRS VoP sent, therefrom selects VoP that the maximum two-way speech data of volume is corresponding as the efficient voice packet of cascade MRS；This efficient voice packet is sent to its subordinate MRS by top MRS, if there is multi-stage cascade, is then issued this efficient voice packet by higher level MRS to its subordinate MRS successively, until efficient voice packet is sent to end level MRS.End level MRS, further according to each UE of its connection, sends the efficient voice packet of UE self correspondence respectively to each UE.Fig. 4 is the cascade scene schematic diagram of meeting sound mixing method embodiment one of the present invention, as shown in Figure 4, assume the two-stage cascade that there is MRS, i.e. top MRS1 and end level MRS2 and MRS3, UE sends VoP to the end level MRS of its connection respectively, MRS2 and MRS3 selects VoP that the maximum two-way speech data of volume is corresponding as efficient voice packet at the corresponding levels respectively from the VoP received, and efficient voice packet at the corresponding levels is sent to MRS1 by end level MRS2 and MRS3 respectively；VoP corresponding to two-way speech data that MRS1 selects volume maximum from four VoPs received is as the efficient voice packet of cascade MRS；Two efficient voice packets of cascade MRS are sent to MRS2 and MRS3, MRS2 and MRS3 according to its UE being connected by MRS1, send each self-corresponding efficient voice packet to each UE respectively.
Step 203, carries out stereo process to the efficient voice packet of self correspondence of described terminal.
Each UE is after receiving the MRS efficient voice packet issued, and the effective data packets of self correspondence is carried out stereo process by each UE respectively.Still for above-mentioned example, RTP2 and RTP3 is carried out stereo process by UEA, and RTP3 is carried out stereo process by UEB, and UEC plays after RTP2 carries out stereo process.Fig. 5 is the common scenarios schematic diagram of meeting sound mixing method embodiment one of the present invention, as shown in Figure 5, the bandwidth assuming single channel voice is w, predetermined number is 2, if there being N side member to add meeting, then the network transmission bandwidth consumed between UE and server is up to 3*N*w, it can be seen that, compared with prior art, the network transmission bandwidth consumed between UE and MRS significantly reduces the present embodiment.
Further, in the present embodiment, when UE sends VoP, the extended field in the packet header of VoP carries the energy value of UE；If after the energy value of each UE being compared on MRS, wherein the speech data of certain UE is not belonging to one of maximum two paths of data of volume, this UE then can be caused to send invalid VoP, and namely this VoP will not be transmitted to other UE by MRS, but is directly dropped.In order to solve this problem, the meeting sound mixing method that the present embodiment provides can also comprise the steps: to send first VoP to described MRS, and described first VoP comprises the energy value of described terminal.Namely in the present embodiment, when UE sends first VoP to MRS every time, in this first VoP, only comprise the energy value of this UE, and do not carry any speech data.When MRS is after comparing and determining the efficient voice packet that current max volume is corresponding with secondary big volume, sends to the UE of each correspondence and effectively confirm message.Therefore, in this scheme further expanded, above-mentioned steps 201 can particularly as follows: receive that described MRS sends effectively confirm message after, send VoP to described MRS, the speech data of the energy value of carried terminal and described terminal in described VoP.Namely UE is sending after first VoP to MRS, waits what MRS to be received sent effectively to confirm message；After this UE receives this effective confirmation message, it was shown that the VoP of this UE sends to other UE as efficient voice packet, then this UE just can send, to MRS, the VoP that comprise self-energy value and speech data；If this UE do not receive in Preset Time always MRS send effectively confirm message, it was shown that the VoP of this UE will not send to other UE as efficient voice packet, then this UE follow-up without to MRS send VoP.Thus just solve the problem sending invalid voice packet because the volume of the speech data of certain UE is little, it is to avoid the waste of resource.
Present embodiments provide a kind of meeting sound mixing method, by sending the VoP of the energy value carrying UE to MRS, and receive the efficient voice packet of MRS UE self correspondence returned, efficient voice packet is the VoP of the MRS maximum predetermined number of volume selected, and the efficient voice packet of UE self correspondence is carried out stereo process；The present embodiment only issues efficient voice packet to UE, compared with prior art, greatly reduces the consumption of network transmission bandwidth between UE and MRS.
Fig. 6 is the flow chart of meeting sound mixing method embodiment two of the present invention, as shown in Figure 6, present embodiments provides a kind of meeting sound mixing method, and technical scheme is illustrated by the present embodiment from server-side, and the present embodiment can specifically include following steps:
Step 601, receives the VoP that each terminal sends respectively, carries the energy value of described each terminal in each described VoP respectively, and each described energy value is respectively used to identify the local voice volume of described each terminal.
This step is that MRS receives each UE VoP sent respectively, and the form of this VoP is RTP form, carries the energy value of each UE in this VoP respectively, and this energy value is for identifying the local voice volume of UE.The present embodiment can extend a field in the VoP of this RTP form, carries the energy value of UE at this extended field.
Specifically, the energy value in the present embodiment carries in the extended field arranged in the packet header of described VoP, specifically may refer to shown in above-mentioned Fig. 3, is carried by the energy value of each UE in the extended field loud in RTP packet header in figure 3.
Step 602, selects, according to described each energy value, the VoP that the speech data of the maximum predetermined number of volume is corresponding, as efficient voice packet from described each VoP.
MRS is after receiving each VoP, according to the energy value carried in each VoP, the VoP that the speech data of the maximum predetermined number of volume is corresponding is selected from these VoPs, and using the VoP of predetermined number that selects as efficient voice packet.Predetermined number herein can be determined according to practical situation, and as being set to 2, then VoP corresponding to MRS selects volume maximum from all VoPs received two-way speech data is as efficient voice packet.The size of the energy value in the present embodiment is for reflecting the size of the local voice volume of UE, and the speech data herein selecting volume maximum is the VoP that the energy value selecting wherein to carry is maximum.
Step 603, is separately sent to described each terminal by the efficient voice packet corresponding with described each terminal, is carried out stereo process by described each terminal respectively.
By after comparing the efficient voice packet selecting predetermined number, the efficient voice packet corresponding with each UE is separately sent to each UE by MRS, is carried out stereo process by described each terminal respectively.Namely in the present embodiment, MRS is not its all VoPs except the VoP of each UE self received to each UE VoP sent, and only sends the efficient voice packet of self correspondence of each UE.Wherein, corresponding with each UE self efficient voice packet is the efficient voice packet in the MRS effective data packets selected except the VoP of UE self.Such as, assume that UEA, UEB and UEC send respective VoP RTP1, RTP2 and RTP3 to MRS respectively, the energy value carried in RTP1, RTP2 and RTP3 respectively 2db, 5db and 8db, the effective data packets that MRS selects is RTP2 and RTP3, then MRS only issues RTP2 and RTP3 to UEA, only issue RTP3 to UEB, only issue RTP2 to UEC.Each UE is after receiving the MRS efficient voice packet issued, and the effective data packets of self correspondence is carried out stereo process by each UE respectively.
Further, in the present embodiment, when there is cascade MRS, the above-mentioned steps 601 in the present embodiment can particularly as follows: in cascade MRS end level MRS receive each terminal send VoP.Above-mentioned steps 602 can particularly as follows: top MRS be according to each energy value in described cascade MRS, the VoP that the speech data of the predetermined number that the volume of selection is maximum is corresponding from each subordinate MRS of described top MRS VoP sent, as efficient voice packet；Wherein, in described cascade MRS, MRS at different levels are respectively by VoP corresponding for the speech data of predetermined number maximum for volume in the subordinate MRS of the described each MRS the received VoP sent, and are sent to the higher level MRS of described each MRS.Specifically, VoP is sent to VoP corresponding to two-way speech data that end level MRS in cascade MRS, end level MRS select volume maximum from the VoP received as efficient voice packet at the corresponding levels by each UE；Efficient voice packet at the corresponding levels is sent to its higher level MRS by end level MRS, this higher level MRS, from each subordinate MRS of its correspondence received VoP sent, selects the VoP that the maximum two-way speech data of volume is corresponding as efficient voice packet at the corresponding levels；If there is multistage MRS, then by that analogy, by subordinate MRS, the efficient voice packet at the corresponding levels selected is sent to its higher level MRS successively, until top MRS in cascade MRS.Top MRS, after receiving its subordinate MRS VoP sent, therefrom selects VoP that the maximum two-way speech data of volume is corresponding as the efficient voice packet of cascade MRS；This efficient voice packet is sent to its subordinate MRS by top MRS, if there is multi-stage cascade, is then issued this efficient voice packet by higher level MRS to its subordinate MRS successively, until efficient voice packet is sent to end level MRS.End level MRS, further according to each UE of its connection, sends the efficient voice packet of UE self correspondence respectively to each UE.
Further, in the present embodiment, for the problem solving to send invalid voice packet because the volume of the speech data of certain UE is little, the present embodiment can also comprise the steps: to receive first VoP that described each terminal sends respectively, each described first VoP comprises the energy value of described each terminal respectively, and does not comprise the speech data of described terminal.Namely in the present embodiment, when UE sends first VoP to MRS every time, in this first VoP, only comprise the energy value of this UE, and do not carry any speech data.Therefore, in this scheme further expanded, above-mentioned steps 601 can particularly as follows: after send effective confirmation message to each terminal, receive the VoP that each terminal sends, carry the energy value of described each terminal and the speech data of described each terminal in each described VoP respectively respectively.Namely when MRS is after comparing and determining the efficient voice packet that current max volume is corresponding with secondary big volume, send to the UE of each correspondence and effectively confirm message.Then MRS just receives each UE VoP sent, and in the VoP of receipt of subsequent, carries energy value and the speech data of each UE.
Present embodiments provide a kind of meeting sound mixing method, by receiving the VoP of each UE energy value carrying UE sent, select VoP that the speech data of the maximum predetermined number of volume is corresponding as efficient voice packet according to each energy value, and to the efficient voice packet that each UE returns self correspondence of each UE, each UE the efficient voice packet of self correspondence is carried out stereo process；The present embodiment is owing to realizing meeting sound mixing function in terminal, and MRS only does the forwarding of packet, it is not necessary to VoP is decoded and coded treatment, and therefore the performance consumption of MRS is little, such that it is able to support Large Copacity ability；Meanwhile, the present embodiment only issues efficient voice packet to UE, compared with prior art, greatly reduces the consumption of network transmission bandwidth between UE and MRS.
Fig. 7 is the signaling diagram of meeting sound mixing method embodiment three of the present invention, as it is shown in fig. 7, present embodiments provide a kind of meeting sound mixing method, the present embodiment is applied to be absent from the scene of cascade, assume that meeting includes three UE:UE1, UE2 and UE3, it is possible to specifically include following steps:
Step 701, the VoP RTP1 of self is sent to MRS by UE1, carries the energy value of UE1, i.e. loud=5db in the extended field (i.e. loud field) in RTP1 packet header.
Step 702, the VoP RTP2 of self is sent to MRS by UE2, carries the energy value of UE2, i.e. loud=2db in the extended field (i.e. loud field) in RTP2 packet header.
Step 703, the VoP RTP3 of self is sent to MRS by UE3, carries the energy value of UE3, i.e. loud=0db in the extended field (i.e. loud field) in RTP3 packet header.
Step 704, the energy value in the more each VoP of MRS, select the VoP that the maximum two-way speech data of volume is corresponding as efficient voice packet, namely select RTP1 and RTP2 as efficient voice packet.
Step 705, efficient voice packet corresponding for UE1 is handed down to UE1 by MRS, is handed down to UE1 by RTP2.
Step 706, UE1 plays after RTP2 is carried out audio mixing by this locality.
Step 707, efficient voice packet corresponding for UE2 is handed down to UE2 by MRS, is handed down to UE2 by RTP1.
Step 708, UE2 plays after RTP1 is carried out audio mixing by this locality.
Step 709, efficient voice packet corresponding for UE3 is handed down to UE3 by MRS, is handed down to UE3 by RTP1 and RTP2.
Step 710, UE3 plays after RTP1 and RTP2 is carried out audio mixing by this locality.
In the present embodiment, the sequential relationship between above-mentioned steps 701,702 and 703 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously；Sequential relationship between above-mentioned steps 705,707 and 709 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously.
Present embodiments provide a kind of meeting sound mixing method, sent the VoP of the energy value carrying each UE to MRS by each UE, MRS selects VoP that the speech data of the maximum predetermined number of volume is corresponding as efficient voice packet according to each energy value, and to the efficient voice packet that each UE returns self correspondence of each UE, each UE the efficient voice packet of self correspondence is carried out stereo process；The present embodiment only issues efficient voice packet to UE, compared with prior art, greatly reduces the consumption of network transmission bandwidth between UE and MRS.
Fig. 8 is the signaling diagram of meeting sound mixing method embodiment four of the present invention, as shown in Figure 8, present embodiments provide a kind of meeting sound mixing method, the present embodiment is applied to exist in the scene of cascade, Fig. 9 is the scene schematic diagram of meeting sound mixing method embodiment four of the present invention, as shown in Figure 9, it is assumed that meeting includes six UE:UE1, UE2, UE3, UE4, UE5 and UE6, including two-stage MRS, i.e. top MRS1 and end level MRS2 and MRS3.The present embodiment can specifically include following steps:
Step 801, the VoP RTP1 of self is sent to MRS2 by UE1, carries the energy value of UE1, i.e. loud=5db in the extended field (i.e. loud field) in RTP1 packet header.
Step 802, the VoP RTP2 of self is sent to MRS2 by UE2, carries the energy value of UE2, i.e. loud=0db in the extended field in RTP2 packet header.
Step 803, the VoP RTP3 of self is sent to MRS2 by UE3, carries the energy value of UE3, i.e. loud=1db in the extended field in RTP3 packet header.
Step 804, the VoP RTP4 of self is sent to MRS3 by UE4, carries the energy value of UE4, i.e. loud=1db in the extended field in RTP4 packet header.
Step 805, the VoP RTP5 of self is sent to MRS3 by UE5, carries the energy value of UE5, i.e. loud=8db in the extended field in RTP5 packet header.
Step 806, the VoP RTP6 of self is sent to MRS3 by UE6, carries the energy value of UE6, i.e. loud=2db in the extended field in RTP6 packet header.
Step 807, energy value in MRS2 more each VoP RTP1, RTP2, RTP3, select the VoP that the maximum two-way speech data of volume is corresponding as efficient voice packet at the corresponding levels, namely select RTP1 and RTP3 as efficient voice packet at the corresponding levels.
Step 808, energy value in MRS3 more each VoP RTP4, RTP5, RTP6, select the VoP that the maximum two-way speech data of volume is corresponding as efficient voice packet at the corresponding levels, namely select RTP5 and RTP6 as efficient voice packet at the corresponding levels.
Step 809, efficient voice packet RTP1 and RTP3 at the corresponding levels is sent to MRS1 by MRS2.
Step 810, efficient voice packet RTP5 and RTP6 at the corresponding levels is sent to by MRS3.
Step 811, the energy value in the more each VoP RTP1 of MRS1, RTP3, RTP5 and RTP6, select the VoP that the maximum two-way speech data of volume is corresponding as efficient voice packet, namely select RTP1 and RTP5 as efficient voice packet.
Step 812, RTP1 and RTP5 is handed down to MRS2 by MRS1.
Step 813, RTP1 and RTP5 is handed down to MRS3 by MRS1.
Step 814, efficient voice packet corresponding for UE1 is handed down to UE1 by MRS2, is handed down to UE1 by RTP5.
Step 815, UE1 plays after RTP5 is carried out audio mixing by this locality.
Step 816, efficient voice packet corresponding for UE2 is handed down to UE2 by MRS2, is handed down to UE2 by RTP1 and RTP5.
Step 817, UE2 plays after RTP1 and RTP5 is carried out audio mixing by this locality.
Step 818, efficient voice packet corresponding for UE3 is handed down to UE3 by MRS2, is handed down to UE3 by RTP1 and RTP5.
Step 819, UE3 plays after RTP1 and RTP5 is carried out audio mixing by this locality.
Step 820, efficient voice packet corresponding for UE4 is handed down to UE4 by MRS3, is handed down to UE4 by RTP1 and RTP5.
Step 821, UE4 plays after RTP1 and RTP5 is carried out audio mixing by this locality.
Step 822, efficient voice packet corresponding for UE5 is handed down to UE5 by MRS3, is handed down to UE5 by RTP1.
Step 823, UE5 plays after RTP1 is carried out audio mixing by this locality.
Step 824, efficient voice packet corresponding for UE6 is handed down to UE6 by MRS3, is handed down to UE6 by RTP1 and RTP5.
Step 825, UE6 plays after RTP1 and RTP5 is carried out audio mixing by this locality.
In the present embodiment, the sequential relationship between above-mentioned steps 801-806 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously；Sequential relationship between above-mentioned steps 807 and 808 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously；Sequential relationship between above-mentioned steps 809 and 810 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously；Sequential relationship between above-mentioned steps 812 and 813 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously；Sequential relationship between above-mentioned steps 814,816,818,820,822 and 824 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously.
Present embodiments provide a kind of meeting sound mixing method, sent the VoP of the energy value carrying each UE to end level MRS in cascade MRS by each UE, end level MRS selects VoP that the speech data of the maximum predetermined number of volume is corresponding as efficient voice packet at the corresponding levels according to each energy value, the efficient voice packet selected is sent to top MRS by each end level MRS, top MRS selects VoP that the speech data of the maximum predetermined number of volume is corresponding as efficient voice packet according to each energy value, and efficient voice packet is handed down to end level MRS, end level MRS returns the efficient voice packet of self correspondence of each UE to each UE, by each UE, the efficient voice packet of self correspondence is carried out stereo process；The present embodiment only issues efficient voice packet to UE, compared with prior art, greatly reduces the consumption of network transmission bandwidth between UE and MRS.
Figure 10 is the signaling diagram of meeting sound mixing method embodiment five of the present invention, as shown in Figure 10, present embodiments providing a kind of meeting sound mixing method, the present embodiment is applied to be absent from the scene of cascade, assume that meeting includes three UE:UE1, UE2 and UE3, it is possible to specifically include following steps:
Step 1001, UE1 sends first VoP RTP1 to MRS, only comprises the energy value of UE1, i.e. loud=2db, do not comprise the speech data of UE1 in the extended field (i.e. loud field) in RTP1 packet header.
Step 1002, UE2 sends first VoP RTP2 to MRS, only comprises the energy value of UE2, i.e. loud=1db, do not comprise the speech data of UE2 in the extended field in RTP2 packet header.
Step 1003, UE3 sends first VoP RTP3 to MRS, only comprises the energy value of UE3, i.e. loud=8db, do not comprise the speech data of UE3 in the extended field in RTP3 packet header.
Step 1004, the energy value in the more each VoP of MRS, obtain UE, i.e. UE1 and UE3 that the maximum two-way speech data of volume is corresponding.
Step 1005, MRS sends to UE1 and effectively confirms message.
Step 1006, MRS sends to UE3 and effectively confirms message.
Step 1007, the VoP RTP1 ' of self is sent to MRS by UE1, carries the energy value of UE1 and the speech data of UE1 in the extended field in RTP1 ' packet header.
Step 1008, the VoP RTP3 ' of self is sent to MRS by UE3, carries the energy value of UE3 and the speech data of UE3 in the extended field in RTP3 ' packet header.
Step 1009, efficient voice packet corresponding for UE1 is handed down to UE1 by MRS, is handed down to UE1 by RTP3 '.
Step 1010, UE1 plays after RTP3 ' is carried out audio mixing by this locality.
Step 1011, efficient voice packet corresponding for UE2 is handed down to UE2 by MRS, is handed down to UE2 by RTP1 ' and RTP3 '.
Step 1012, UE2 plays after RTP1 ' and RTP3 ' is carried out audio mixing by this locality.
Step 1013, efficient voice packet corresponding for UE3 is handed down to UE3 by MRS, is handed down to UE3 by RTP1 '.
Step 1014, UE3 plays after RTP1 ' is carried out audio mixing by this locality.
In the present embodiment, the sequential relationship between above-mentioned steps 1001,1002 and 1003 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously；Sequential relationship between above-mentioned steps 1005 and 1006 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously；Sequential relationship between above-mentioned steps 1007 and 1008 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously；Sequential relationship between above-mentioned steps 1009,1011 and 1013 is not limited to be described above, it is also possible to adopts other sequential relationship, or performs simultaneously.
Present embodiments provide a kind of meeting sound mixing method, sent the VoP of the energy value only comprising each UE to MRS by each UE, MRS selects, according to each energy value, the UE that the speech data of the maximum predetermined number of volume is corresponding, and effectively confirm message to these UE transmission, receive each UE effectively confirming message and send the VoP carrying own voices data to MRS, MRS using the VoP that receives as efficient voice packet, and return the efficient voice packet of self correspondence of each UE, by each UE, the efficient voice packet of self correspondence is carried out stereo process；The present embodiment only issues efficient voice packet to UE, compared with prior art, greatly reduces the consumption of network transmission bandwidth between UE and MRS.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can be completed by the hardware that programmed instruction is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program upon execution, performs to include the step of above-mentioned each embodiment of the method；And aforesaid storage medium includes: the various media that can store program code such as ROM, RAM, magnetic disc or CDs.
Figure 11 is the structural representation of terminal embodiment one of the present invention, as shown in figure 11, present embodiments provides a kind of terminal, it is possible to concrete each step performed in said method embodiment one, repeats no more herein.The terminal that the present embodiment provides can include the first sending module the 1101, first receiver module 1102 and mix module 1103.Wherein, the first sending module 1101 is for sending VoP, the energy value of carried terminal in described VoP to Media Resource Server MRS, and described energy value is for identifying the local voice volume of described terminal.First receiver module 1102 is for receiving the efficient voice packet of described MRS described terminal self correspondence sent, and described efficient voice packet is the VoP that the speech data of the maximum predetermined number of the described MRS volume selected from all VoPs received is corresponding.Mix module 1103 is for carrying out stereo process to the efficient voice packet of self correspondence of described terminal.
Figure 12 is the structural representation of terminal embodiment two of the present invention, as shown in figure 12, present embodiments provides a kind of terminal, it is possible to concrete each step performed in said method embodiment three, embodiment four or embodiment five, repeats no more herein.The terminal that the present embodiment provides is carried on the basis of above-mentioned Figure 11, and when there is cascade MRS, the first receiver module 1102 can specifically for receiving the efficient voice packet of described terminal self correspondence that end level MRS sends in described cascade MRS；Wherein, described efficient voice packet be in cascade MRS top MRS according to each energy value, the VoP that the speech data of the predetermined number that the volume that selects from each subordinate MRS of described top MRS VoP sent is maximum is corresponding；In described cascade MRS, MRS at different levels are respectively by VoP corresponding for the speech data of predetermined number maximum for volume in the subordinate MRS of the described each MRS the received VoP sent, and are sent to the higher level MRS of described each MRS.
Further, the terminal that the present embodiment provides can also include the second sending module 1104, second sending module 1104 is for sending first VoP to described MRS, and described first VoP comprises the energy value of described terminal, and does not comprise the speech data of described terminal.First sending module 1101 specifically for receive that described MRS sends effectively confirm message after, send VoP to described MRS, the speech data of the energy value of carried terminal and described terminal in described VoP.
Specifically, the energy value in the present embodiment carries in the extended field arranged in the packet header of described VoP.
Present embodiments provide a kind of terminal, by sending the VoP of the energy value carrying UE to MRS, and receive the efficient voice packet of MRS UE self correspondence returned, efficient voice packet is the VoP of the MRS maximum predetermined number of volume selected, and the efficient voice packet of UE self correspondence is carried out stereo process；The present embodiment only issues efficient voice packet to UE, compared with prior art, greatly reduces the consumption of network transmission bandwidth between UE and MRS.
Figure 13 is the structural representation of Media Resource Server embodiment one of the present invention, as shown in figure 13, present embodiments provides a kind of Media Resource Server, it is possible to concrete each step performed in said method embodiment two, repeats no more herein.The Media Resource Server that the present embodiment provides can include the second receiver module 1301, select module 1302 and the 3rd sending module 1303.Wherein, the second receiver module 1301, for receiving the VoP that each terminal sends respectively, carries the energy value of described each terminal respectively in each described VoP, each described energy value is respectively used to identify the local voice volume of described each terminal.Select the VoP that the speech data of the module 1302 predetermined number for selecting volume maximum from described each VoP according to described each energy value is corresponding, as efficient voice packet.3rd sending module 1303, for the efficient voice packet corresponding with described each terminal is separately sent to described each terminal, is carried out stereo process by described each terminal respectively.
Figure 14 is the structural representation of Media Resource Server embodiment two of the present invention, as shown in figure 14, present embodiments provide a kind of Media Resource Server, it is possible to concrete each step performed in said method embodiment three, embodiment four or embodiment five, repeat no more herein.The Media Resource Server that the present embodiment provides carries on the basis of above-mentioned Figure 13, when there is cascade MRS, second receiver module 1301 can specifically for being received, by end level MRS in cascade MRS, the VoP that each terminal sends respectively, carrying the energy value of described each terminal in each described VoP respectively, each described energy value is respectively used to identify the local voice volume of described each terminal.Select module 1302 can specifically for by top MRS in described cascade MRS according to each energy value, the VoP that the speech data of the predetermined number that the volume of selection is maximum is corresponding from each subordinate MRS of described top MRS VoP sent, as efficient voice packet；Wherein, in described cascade MRS, MRS at different levels are respectively by VoP corresponding for the speech data of predetermined number maximum for volume in the subordinate MRS of the described each MRS the received VoP sent, and are sent to the higher level MRS of described each MRS.
Further, the Media Resource Server that the present embodiment provides can also include the 3rd receiver module 1304,3rd receiver module 1304 may be used for receiving first VoP that described each terminal sends respectively, each described first VoP comprises the energy value of described each terminal respectively, and does not comprise the speech data of described terminal.Second receiver module 1301 can specifically for, after send effective confirmation message to each terminal, receiving the VoP that each terminal sends, carry the energy value of described each terminal and the speech data of described each terminal in each described VoP respectively respectively.
Specifically, the energy value in the present embodiment carries in the extended field arranged in the packet header of described VoP.
Present embodiments provide a kind of Media Resource Server, by receiving the VoP of each UE energy value carrying UE sent, select VoP that the speech data of the maximum predetermined number of volume is corresponding as efficient voice packet according to each energy value, and to the efficient voice packet that each UE returns self correspondence of each UE, each UE the efficient voice packet of self correspondence is carried out stereo process；The present embodiment only issues efficient voice packet to UE, compared with prior art, greatly reduces the consumption of network transmission bandwidth between UE and MRS.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a meeting sound mixing method, it is characterised in that including:
Sending VoP, the energy value of carried terminal in described VoP to Media Resource Server MRS, described energy value is for identifying the local voice volume of described terminal；
Receiving the described MRS efficient voice packet of described terminal self correspondence sent, described efficient voice packet is the VoP that the speech data of the maximum predetermined number of the described MRS volume selected from all VoPs received is corresponding；
The efficient voice packet of self correspondence of described terminal is carried out stereo process；
Described method also includes: sending first VoP to described MRS, described first VoP comprises the energy value of described terminal, and does not comprise the speech data of described terminal；
Described to MRS transmission VoP, in described VoP carried terminal energy value particularly as follows: receive that described MRS sends effectively confirm message after, VoP is sent, the speech data of the energy value of carried terminal and described terminal in described VoP to described MRS.
2. method according to claim 1, it is characterized in that, when there is cascade MRS, the efficient voice packet of described terminal self correspondence that the described MRS of described reception sends, described efficient voice packet be VoP that the speech data of the maximum predetermined number of the described MRS volume selected from all VoPs received is corresponding particularly as follows:
Receive the efficient voice packet of described terminal self correspondence that end level MRS sends in described cascade MRS；Wherein, described efficient voice packet be in cascade MRS top MRS according to each energy value, the VoP that the speech data of the predetermined number that the volume that selects from each subordinate MRS of described top MRS VoP sent is maximum is corresponding；In described cascade MRS, MRS at different levels are respectively by VoP corresponding for the speech data of predetermined number maximum for volume in the subordinate MRS of the described each MRS the received VoP sent, and are sent to the higher level MRS of described each MRS.
3. a meeting sound mixing method, it is characterised in that including:
Receiving the VoP that each terminal sends respectively, carry the energy value of described each terminal in each described VoP respectively, each described energy value is respectively used to identify the local voice volume of described each terminal；
From described each VoP, the VoP that the speech data of the maximum predetermined number of volume is corresponding is selected, as efficient voice packet according to described each energy value；
The efficient voice packet corresponding with described each terminal is separately sent to described each terminal, is carried out stereo process by described each terminal respectively；
Described method also includes: receiving first VoP that described each terminal sends respectively, each described first VoP comprises the energy value of described each terminal respectively, and does not comprise the speech data of described terminal；
The described VoP receiving the transmission of each terminal respectively, each described VoP carries the energy value of described each terminal respectively particularly as follows: after sending to each terminal and effectively confirming message, receive the VoP that each terminal sends respectively, each described VoP carries the energy value of described each terminal and the speech data of described each terminal respectively.
4. method according to claim 3, it is characterised in that when there is cascade MRS, described receive respectively each terminal send VoP particularly as follows: in described cascade MRS end level MRS receive respectively each terminal send VoP；
The VoP that the described speech data selecting the maximum predetermined number of volume according to described each energy value from described each VoP is corresponding, as efficient voice packet particularly as follows: top MRS is according to each energy value in described cascade MRS, the VoP that the speech data of the predetermined number that the volume of selection is maximum is corresponding from each subordinate MRS of described top MRS VoP sent, as efficient voice packet；Wherein, in described cascade MRS, MRS at different levels are respectively by VoP corresponding for the speech data of predetermined number maximum for volume in the subordinate MRS of the described each MRS the received VoP sent, and are sent to the higher level MRS of described each MRS.
5. a terminal, it is characterised in that including:
First sending module, for sending VoP, the energy value of carried terminal in described VoP to Media Resource Server MRS, described energy value is for identifying the local voice volume of described terminal；
First receiver module, for receiving the described MRS efficient voice packet of described terminal self correspondence sent, described efficient voice packet is the VoP that the speech data of the maximum predetermined number of the described MRS volume selected from all VoPs received is corresponding；
Mix module, for carrying out stereo process to the efficient voice packet of self correspondence of described terminal；
Second sending module, for sending first VoP to described MRS, described first VoP comprises the energy value of described terminal, and does not comprise the speech data of described terminal；
Described first sending module specifically for receive that described MRS sends effectively confirm message after, send VoP to described MRS, the speech data of the energy value of carried terminal and described terminal in described VoP.
6. terminal according to claim 5, it is characterised in that when there is cascade MRS, described first receiver module is specifically for receiving the efficient voice packet of described terminal self correspondence that end level MRS sends in described cascade MRS；Wherein, described efficient voice packet be in cascade MRS top MRS according to each energy value, the VoP that the speech data of the predetermined number that the volume that selects from each subordinate MRS of described top MRS VoP sent is maximum is corresponding；In described cascade MRS, MRS at different levels are respectively by VoP corresponding for the speech data of predetermined number maximum for volume in the subordinate MRS of the described each MRS the received VoP sent, and are sent to the higher level MRS of described each MRS.
7. a Media Resource Server, it is characterised in that including:
Second receiver module, for receiving the VoP that each terminal sends respectively, carries the energy value of described each terminal respectively in each described VoP, each described energy value is respectively used to identify the local voice volume of described each terminal；
Selecting module, the VoP that speech data for selecting the maximum predetermined number of volume from described each VoP according to described each energy value is corresponding, as efficient voice packet；
3rd sending module, for the efficient voice packet corresponding with described each terminal is separately sent to described each terminal, is carried out stereo process by described each terminal respectively；
3rd receiver module, for receiving first VoP that described each terminal sends respectively, each described first VoP comprises the energy value of described each terminal respectively, and does not comprise the speech data of described terminal；
Described second receiver module is specifically for, after send effective confirmation message to each terminal, receiving the VoP that each terminal sends respectively, carry the energy value of described each terminal and the speech data of described each terminal in each described VoP respectively.
8. server according to claim 7, it is characterized in that, when there is cascade MRS, described second receiver module is specifically for being received, by end level MRS in cascade MRS, the VoP that each terminal sends respectively, carrying the energy value of described each terminal in each described VoP respectively, each described energy value is respectively used to identify the local voice volume of described each terminal；
Described selection module specifically for by top MRS in described cascade MRS according to each energy value, the VoP that the speech data of the predetermined number that the volume of selection is maximum is corresponding from each subordinate MRS of described top MRS VoP sent, as efficient voice packet；Wherein, in described cascade MRS, MRS at different levels are respectively by VoP corresponding for the speech data of predetermined number maximum for volume in the subordinate MRS of the described each MRS the received VoP sent, and are sent to the higher level MRS of described each MRS.
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| CN104167210A (en) * | 2014-08-21 | 2014-11-26 | 华侨大学 | Lightweight class multi-side conference sound mixing method and device |
| CN106973253B (en) * | 2016-01-13 | 2020-04-14 | 华为技术有限公司 | Method and device for adjusting media stream transmission |
| EP3208992B1 (en) * | 2016-02-16 | 2018-09-26 | Sennheiser Communications A/S | Communication system, control device and method for communicating audio signals between multiple control devices |
| CN109087656B (en) * | 2017-06-14 | 2020-11-17 | 广东亿迅科技有限公司 | Multimedia conference sound mixing method and device based on MCU |
| CN112152975B (en) * | 2019-06-28 | 2022-11-08 | 成都鼎桥通信技术有限公司 | Audio data processing method and device |
| CN110148401B (en) * | 2019-07-02 | 2023-12-15 | 腾讯科技（深圳）有限公司 | Speech recognition method, device, computer equipment and storage medium |
| CN111541860B (en) * | 2019-12-30 | 2021-07-27 | 宁波菊风系统软件有限公司 | Real-time audio transmission system and using method thereof |
| CN113271432B (en) * | 2021-06-30 | 2022-11-18 | 北京二六三企业通信有限公司 | Method and apparatus for transmitting and receiving speaker list |
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