CN109743638A - A kind of video multicast method and device - Google Patents
A kind of video multicast method and device Download PDFInfo
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- CN109743638A CN109743638A CN201910093122.2A CN201910093122A CN109743638A CN 109743638 A CN109743638 A CN 109743638A CN 201910093122 A CN201910093122 A CN 201910093122A CN 109743638 A CN109743638 A CN 109743638A
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Abstract
Disclose a kind of video multicast method and device.A kind of video multicast method, which is characterized in that the described method includes: server-side according to several coded formats are preset, encodes specified source data in the case where receiving multicast instruction, obtains the corresponding several target datas of each coded format；Several target datas are sent to next layer of intermediary routing node by server-side；The intermediary routing node that lower layer of server-side is distributed or filters to each target data according to goal-selling data distribution rule after several target datas for receiving server-side transmission；Client, if received target data includes master data and enhancing data, carries out combined decoding to master data and enhancing data, obtains the corresponding enhancing video of the source data in the case where receiving the target data of intermediary routing node transmission；If the target data received only includes master data, master data is decoded, obtains the corresponding base video of the source data.
Description
Technical field
This specification embodiment is related to network communication technology field more particularly to a kind of video multicast method and device.
Background technique
, can be by video multicast technology in the fields such as video conference, remote teaching, net cast, it will be with a view
Frequency avoids Data duplication from sending, improves the efficiency of video data transmission according to multiple user equipmenies are sent to simultaneously.But depending on
Multicast is generally carried out using identical rate in frequency multicasting technology, and the format of institute's group broadcasting video frequency is also identical, and different user
The difference of network environment and hardware performance locating for equipment, reception and processing capacity to video data are there is also difference, therefore meeting
Cause part of links congestion and the bandwidth of part of links is unable to get and makes full use of.
A solution of the prior art is, using RSVP (Resource Reservation Protocol, resource
Reservation protocol) technology reserves certain Internet resources before video data starts transmission first, to guarantee enough numbers
According to transfer resource, link congestion is solved the problems, such as.But when number of user equipment increases, need to reserve more network money
Source so that network equipment pressure is excessive, and can not still solve the problems, such as that the bandwidth of part of links is unable to get and make full use of.
Summary of the invention
In view of this, this specification embodiment provides a kind of video multicast method and device, technical solution is as follows:
A kind of video multicast method, which is characterized in that the method is applied to Video Multicast System, which includes service
End, client and several intermediary routing nodes, which comprises
The server-side, according to preset several coded formats, refers to the instruction in the case where receiving multicast instruction
Fixed source data is encoded, and the corresponding several target datas of each coded format are obtained；Wherein, the corresponding mesh of different coding format
It marks in data, including one group of master data and at least one set of enhancing data；
Several target datas are sent to next layer of intermediary routing node by the server-side；
The intermediary routing node that lower layer of the server-side receive server-side transmission several target datas after, according to
Goal-selling data distribution rule is distributed or filters to each target data；
Wherein, the method for being distributed or filtering according to goal-selling data distribution rule includes:
Determine the client whether each target data is sent to next layer of intermediary routing node and/or is connected；?
In the case where the determining intermediary routing node for being sent to next layer, which is sent to next layer of intermediate routing section
Point, so that the intermediary routing node continues to distribute or filter the target data according to the method for the distribution or filtering；In determination
In the case where being sent to connected client, which is sent to the client；
The client is in the case where receiving the target data of intermediary routing node transmission, if received target
Data include master data and enhancing data, then carry out combined decoding to master data and enhancing data, obtain the source data
Corresponding enhancing video；If the target data received only includes master data, master data is decoded, is obtained described
The corresponding base video of source data；Wherein, enhance the video quality of video better than base video.
A kind of Video Multicast System, which is characterized in that the system includes server-side, client and several intermediate routing sections
Point:
The server-side, according to preset several coded formats, refers to the instruction in the case where receiving multicast instruction
Fixed source data is encoded, and the corresponding several target datas of each coded format are obtained；Wherein, the corresponding mesh of different coding format
It marks in data, including one group of master data and at least one set of enhancing data；
Several target datas are sent to next layer of intermediary routing node by the server-side；
The intermediary routing node that lower layer of the server-side receive server-side transmission several target datas after, according to
Goal-selling data distribution rule is distributed or filters to each target data；
Wherein, the device for being distributed or filtering according to goal-selling data distribution rule includes:
Determine the client whether each target data is sent to next layer of intermediary routing node and/or is connected；?
In the case where the determining intermediary routing node for being sent to next layer, which is sent to next layer of intermediate routing section
Point, so that the intermediary routing node continues to distribute or filter the target data according to the device of the distribution or filtering；In determination
In the case where being sent to connected client, which is sent to the client；
The client is in the case where receiving the target data of intermediary routing node transmission, if received target
Data include master data and enhancing data, then carry out combined decoding to master data and enhancing data, obtain the source data
Corresponding enhancing video；If the target data received only includes master data, master data is decoded, is obtained described
The corresponding base video of source data；Wherein, enhance the video quality of video better than base video.
Video source data is carried out hierarchical coding, obtains basic data by technical solution provided by this specification embodiment
Data-handling capacity and the poor link of transmittability or client are only transmitted to processing capacity and passed with enhancing data
The lower basic data of delivery of energy force request, client can independently decode to obtain base video after receiving basic data；And it is right
In data-handling capacity and transmittability more preferably link or client, then transmission is lower to processing capacity and transmittability requirement
Basic data and enhancing data, client receive basic data and enhancing data after can be obtained with combined decoding enhancing view
Frequently.The link or client that processing capacity can be made different from transmittability by this programme, pointedly obtain video quality
Suitable video avoids link congestion or waste.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
This specification embodiment can be limited.
In addition, any embodiment in this specification embodiment does not need to reach above-mentioned whole effects.
Detailed description of the invention
In order to illustrate more clearly of this specification embodiment or technical solution in the prior art, below will to embodiment or
Attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
The some embodiments recorded in this specification embodiment for those of ordinary skill in the art can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is a kind of application scenarios schematic diagram of this specification embodiment video multicast method；
Fig. 2 is the interaction flow schematic diagram of this specification embodiment video multicast method；
Fig. 3 is the structural schematic diagram of this specification embodiment Video Multicast System.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution in this specification embodiment, below in conjunction with this
Attached drawing in specification embodiment is described in detail the technical solution in this specification embodiment, it is clear that described
Embodiment is only a part of the embodiment of this specification, instead of all the embodiments.The embodiment of base in this manual,
Those of ordinary skill in the art's every other embodiment obtained, all should belong to the range of protection.
With the development of multimedia technology and broadband network, video multicast technology is in video conference, remote teaching, in real time view
Frequency live streaming etc., is widely used.By video multicast technology, will can be sent to simultaneously with a video data
Multiple user equipmenies improve the efficiency of video data transmission so that Data duplication be avoided to send.
Multicast is generally carried out using identical rate in video multicast technology, and the format of institute's group broadcasting video frequency is also identical,
But in video group the hardware condition of each member device, operating system interconnection equipment performance and network environment transmittability
There may be difference, i.e., each member device has differences the reception ability of video data with processing capacity.
It is insufficient if it is bandwidth in the network environment for solving the problems, such as few members' equipment, and minimum-rate is used to carry out
Transmission generates video code flow by the condition of acceptance of the minimum member of bandwidth and sends all member devices to, although may be implemented
All member devices can obtain video, but the enough member devices of bandwidth can only also receive second-rate video, and
It is not able to satisfy the demand of higher quality video, and causes the waste of bandwidth resources；And it is abundant if meeting bandwidth resources
Member device demand, i.e., according to best in quality generate video code flow send all member devices to, then again be more than it
The tolerance range of his member device to the reception ability of video data, it would be possible to cause video data packet loss and network congestion.
A solution of the prior art is, using RSVP (Resource Reservation Protocol, resource
Reservation protocol) technology reserves certain Internet resources before video data starts transmission first, to guarantee enough numbers
According to transfer resource, link congestion is solved the problems, such as.But when number of user equipment increases, need to reserve more network money
Source so that network equipment pressure is excessive, and can not still solve the problems, such as that the bandwidth of part of links is unable to get and make full use of.
In view of the problems of the existing technology, this specification provides a kind of video multicast method, is applied to video multicast system
System, which includes server-side, client and several intermediary routing nodes, and a kind of structural schematic diagram of the system can be such as Fig. 1
It is shown.The video multicast method provided by this specification by video source data hierarchical coding and can be transmitted, it is possible, firstly, to
Source data is encoded to basic data, the available base video with poor quality after basic data decoding, secondly, may be used also
To encode to obtain enhancing data for source data, enhancing data can not individually decode to obtain video data, and need and basic data
Combined decoding obtains more preferably enhancing data than base video quality.Basic data and enhancing data can be understood as two layers
Secondary target data, and enhance data and can be further divided into many levels, the i.e. hierarchical coding of video data and transmission.
Interaction diagrams shown in Figure 2, this method may comprise steps of:
S101, the server-side, according to preset several coded formats, refer to this in the case where receiving multicast instruction
It enables specified source data be encoded, obtains the corresponding several target datas of each coded format；Wherein, different coding format is corresponding
Target data in, including one group of master data and at least one set of enhancing data；
It in this specification embodiment, can be encoded by source data of the diversified forms to video, this specification is implemented
Example does not limit this.
In a kind of specific embodiment of this specification embodiment, it can be encoded by MPEG-4 format.?
In MPEG-4 video code flow, each VO (Video Object, the video object) is encoded into several VOL (Video Object
Layer, video object layer), and each VOL is made of several GOV (Group of VOPs, video object plane group), and it is each
GOV contains one group of VOP (Video Object Plane, video object plane) again.
If by the network mode of RTP/UDP/IP come video data transmission, MPEG-4 vision code stream can directly reflect
It is mapped to RTP packet, without increasing additional head file or deleting any vision syntax element.
In addition, various modes, this specification can be used when the vision code stream after coding is mapped to RTP packet
Embodiment does not limit this.
In one example, in order to support Delamination Transmission, need to keep the integrality of VOP data, therefore be packaged a RTP
Packet only carries the data of a VOP, and the data of a VOP are then possibly comprised in the continuous RTP data packet of data.One
RTP packet is made of RTP header, VOP header and Video Packet, and occur as new VO, VOL or a GOV
When, their header information maps directly to a new RTP data packet, and new VOP data then follow to be believed on these heads
Below, in this way, each RTP only includes the data for belonging to a VOP to breath.
In addition, the biggish VOP segmentation of data volume can be encapsulated into several continuous RTP to avoid IP data packet too long
In data packet, and the M flag bit being arranged in RTP packet, for example, if M flag bit is 1, then it represents that carried in next RTP packet
It is still the data of this VOP.
Several target datas are sent to next layer of intermediary routing node by S102, the server-side；
S103, the intermediary routing node that lower layer of the server-side is in several target datas for receiving server-side transmission
Afterwards, each target data is distributed or is filtered according to goal-selling data distribution rule；
Wherein, the method for being distributed or filtering according to goal-selling data distribution rule includes:
Determine the client whether each target data is sent to next layer of intermediary routing node and/or is connected；?
In the case where the determining intermediary routing node for being sent to next layer, which is sent to next layer of intermediate routing section
Point, so that the intermediary routing node continues to distribute or filter the target data according to the method for the distribution or filtering；In determination
In the case where being sent to connected client, which is sent to the client；
Under normal circumstances, client included in Video Multicast System and intermediary routing node are for 2 or more, are
The data of the intermediary routing node and client that are sent to different layers are distinguished, can carry out level mark in IP packet
Know, intermediary routing node judges distribution level corresponding to this target data by identification level identities.This specification embodiment
In can specifically carry out level identities in several ways, for example, level mark can be carried out using the tos field in the packet header IP
Know, this specification embodiment does not limit this.
Goal-selling data distribution rule in this specification embodiment, can be in server-side and intermediary routing node to mesh
Mark data are distributed with before filtering, are determined according to client and the request of data of intermediary routing node.
In a kind of specific embodiment of this specification embodiment, it is possible, firstly, to from client to the centre connected
Routing node sends client data request, and request of data is for indicating the video that local terminal decodes received target data
The demand of quality, for example, the bandwidth etc. of network environment locating for local terminal can be indicated.
Client data request can be specifically generated in several ways in client, for example, can in Video Multicast System
Grade is provided to preset several Video services, every kind of grade can provide the video of different quality, and use client
User can be according to the hardware device situation of local terminal and the bandwidth situation of locating network environment, and according to video quality
Demand selects the Video service for being suitble to local terminal to provide grade, to generate corresponding client data request；For another example, client
It can detecte the hardware device situation of local terminal and the bandwidth situation of locating network environment, so that generating demand can be met
Client data request；Etc..
It, can be with secondly, the intermediary routing node connecting with client is after receiving the client data request of client
Routing request of data is sent to the server-side connected or upper one layer of intermediary routing node.
Intermediary routing node can specifically be saved to the server-side or upper one layer of intermediate routing connected in several ways
Point sends routing request of data, and this specification embodiment is without limitation.
In one example, can first by the intermediary routing node determine upper one layer that local terminal connected for server-side or
Intermediary routing node, in the case where being connect with server-side for one layer on local terminal, according to the received client data request of institute, to clothes
Business end sends routing request of data, so that server-side sends target data to local terminal according to the request；And on local terminal one layer with
In the case that intermediary routing node connects, according to the received client data request of institute, upper layer intermediary routing node is sent
Request of data is routed, so that upper one layer of intermediary routing node sends routing according to the method upper layer for sending routing request of data
Request of data.
In another example, as shown in Figure 1, it is understood that there may be the case where shared link, for example, client 4 and client 5
Between, link of the existing shared link between intermediary routing node 3 and intermediary routing node 5, shared link can mention
The transmittability of confession, it is necessary to meet the demand of all clients using the link, i.e. intermediary routing node 3 and intermediate routing saves
The transmittability (such as code stream) of link between point 5, it has to be possible to which transmission is sent to the number of targets of client 4 Yu client 5
According to.Therefore, it when intermediary routing node has received the request of data of connected multiple client, needs to indicate in request
Demand polymerize after, then upper layer intermediary routing node or server-side send routing request of data.
Therefore, the quantity that can determine the connected client of local terminal by the intermediary routing node first is determining local terminal company
In the case where connecing multiple client, according to the client data request for connecting each client received, determine described in determination
Each client is to the aggregate demand of video quality, thus according to identified aggregate demand, to the server-side that is connected or it is one layer upper in
Between routing node send routing request of data.
In addition, intermediary routing node is in the case where receiving the client data request of client, it is acceptable further
The ability of client reception and processing target data is obtained, and judges the corresponding need of the client data request of the client
It asks, if it is less than identified ability, if it is not, then the demand in received client data request is adjusted, so that
Demand adjusted is no more than identified ability.
S104, the client is in the case where receiving the target data of intermediary routing node transmission, if received
Target data include master data and enhancing data, then combined decoding is carried out to master data and enhancing data, obtained described
The corresponding enhancing video of source data；If the target data received only includes master data, master data is decoded, is obtained
To the corresponding base video of the source data；Wherein, enhance the video quality of video better than base video.
Corresponding to above method embodiment, this specification embodiment also provides a kind of Video Multicast System, referring to Fig. 3 institute
Show, the apparatus may include server-side 10, client 20 and several intermediary routing nodes 30:
The server-side, according to preset several coded formats, refers to the instruction in the case where receiving multicast instruction
Fixed source data is encoded, and the corresponding several target datas of each coded format are obtained；Wherein, the corresponding mesh of different coding format
It marks in data, including one group of master data and at least one set of enhancing data；
Several target datas are sent to next layer of intermediary routing node by the server-side；
The intermediary routing node that lower layer of the server-side receive server-side transmission several target datas after, according to
Goal-selling data distribution rule is distributed or filters to each target data；
Wherein, the device for being distributed or filtering according to goal-selling data distribution rule includes:
Determine the client whether each target data is sent to next layer of intermediary routing node and/or is connected；?
In the case where the determining intermediary routing node for being sent to next layer, which is sent to next layer of intermediate routing section
Point, so that the intermediary routing node continues to distribute or filter the target data according to the device of the distribution or filtering；In determination
In the case where being sent to connected client, which is sent to the client；
The client is in the case where receiving the target data of intermediary routing node transmission, if received target
Data include master data and enhancing data, then carry out combined decoding to master data and enhancing data, obtain the source data
Corresponding enhancing video；If the target data received only includes master data, master data is decoded, is obtained described
The corresponding base video of source data；Wherein, enhance the video quality of video better than base video.
In a kind of specific embodiment of this specification embodiment, the system can also include:
Client sends client data request to the intermediary routing node connected；
The intermediary routing node connecting with client is after receiving the client data request of client, Xiang Suolian
The server-side connect or upper one layer of intermediary routing node send routing request of data；The request of data is for indicating local terminal to being connect
Receive the demand for the video quality that target data decodes.
In a kind of specific embodiment of this specification embodiment, the intermediary routing node tool being connect with client
Body can send routing request of data to the server-side connected or upper one layer of intermediary routing node in the following manner:
Determine that upper one layer that local terminal is connected is server-side or intermediary routing node；
In the case where being connect with server-side for one layer on local terminal, according to the received client data request of institute, to server-side
Routing request of data is sent, so that server-side sends target data to local terminal according to the request；
In the case where being connect with intermediary routing node for one layer on local terminal, according to the received client data request of institute, to
Upper one layer of intermediary routing node sends routing request of data, so that upper one layer of intermediary routing node routes request of data according to transmission
System upper layer send routing request of data.
In a kind of specific embodiment of this specification embodiment, the intermediary routing node tool being connect with client
Body can send routing request of data to the server-side connected or upper one layer of intermediary routing node in the following manner:
Determine the quantity of the connected client of local terminal；
In the case where determining that local terminal connects multiple client, according to the number clients for connecting each client received
According to request, determine each client to the aggregate demand of video quality；
According to identified aggregate demand, routing data are sent to the server-side connected or upper one layer of intermediary routing node and are asked
It asks.
In a kind of specific embodiment of this specification embodiment, the system can also include:
Intermediary routing node in the case where receiving the client data request of client, obtain the client receive with
The ability of processing target data；
Judge the corresponding demand of the client data request of the client, if be less than identified ability；
If it is not, then the demand in received client data request is adjusted, so that demand adjusted is no more than
Identified ability.
The function of each unit and the realization process of effect are specifically detailed in the above method and correspond to step in above-mentioned apparatus
Realization process, details are not described herein.
For device embodiment, since it corresponds essentially to embodiment of the method, so related place is referring to method reality
Apply the part explanation of example.The apparatus embodiments described above are merely exemplary, wherein described be used as separation unit
The unit of explanation may or may not be physically separated, and component shown as a unit can be or can also be with
It is not physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to actual
The purpose for needing to select some or all of the modules therein to realize this specification example scheme.Ordinary skill people
Member can understand and implement without creative efforts.
Although this specification includes many specific implementation details, these are not necessarily to be construed as the model for limiting any invention
It encloses or range claimed, and is primarily used for describing the feature of the specific embodiment of specific invention.In this specification
Certain features described in multiple embodiments can also be combined implementation in a single embodiment.On the other hand, individually implementing
Various features described in example can also be performed separately in various embodiments or be implemented with any suitable sub-portfolio.This
Outside, although feature can work in certain combinations as described above and even initially so be claimed, institute is come from
One or more features in claimed combination can be removed from the combination in some cases, and claimed
Combination can be directed toward the modification of sub-portfolio or sub-portfolio.
Similarly, although depicting operation in the accompanying drawings with particular order, this is understood not to require these behaviour
Make the particular order shown in execute or sequentially carry out or require the operation of all illustrations to be performed, to realize desired knot
Fruit.In some cases, multitask and parallel processing may be advantageous.In addition, the various system modules in above-described embodiment
Separation with component is understood not to be required to such separation in all embodiments, and it is to be understood that described
Program assembly and system can be usually integrated in together in single software product, or be packaged into multiple software product.
The specific embodiment of theme has been described as a result,.Other embodiments are within the scope of the appended claims.?
In some cases, the movement recorded in claims can be executed in different order and still realize desired result.This
Outside, the processing described in attached drawing and it is nonessential shown in particular order or sequential order, to realize desired result.In certain realities
In existing, multitask and parallel processing be may be advantageous.
The foregoing is merely the preferred embodiments of this specification embodiment, do not implement to limit this specification
Example, all within the spirit and principle of this specification embodiment, any modification, equivalent substitution, improvement and etc. done should all include
Within the scope of the protection of this specification embodiment.
Claims (10)
1. a kind of video multicast method, which is characterized in that the method is applied to Video Multicast System, which includes service
End, client and several intermediary routing nodes, which comprises
The server-side, according to preset several coded formats, specifies the instruction in the case where receiving multicast instruction
Source data is encoded, and the corresponding several target datas of each coded format are obtained；Wherein, the corresponding number of targets of different coding format
In, including one group of master data and at least one set of enhancing data；
Several target datas are sent to next layer of intermediary routing node by the server-side；
The intermediary routing node that lower layer of the server-side is after several target datas for receiving server-side transmission, according to default
Target data distribution rules are distributed or filter to each target data；
Wherein, the method for being distributed or filtering according to goal-selling data distribution rule includes:
Determine the client whether each target data is sent to next layer of intermediary routing node and/or is connected；In determination
In the case where being sent to next layer of intermediary routing node, which is sent to next layer of intermediary routing node, with
The intermediary routing node is set to continue to distribute or filter the target data according to the method for the distribution or filtering；It is sent determining
To connected client, which is sent to the client；
The client is in the case where receiving the target data of intermediary routing node transmission, if received target data
Including master data and enhancing data, then combined decoding is carried out to master data and enhancing data, it is corresponding to obtain the source data
Enhancing video；If the target data received only includes master data, master data is decoded, obtains the source number
According to corresponding base video；Wherein, enhance the video quality of video better than base video.
2. the method according to claim 1, wherein the method also includes:
Client sends client data request to the intermediary routing node connected；
The intermediary routing node connecting with client is after receiving the client data request of client, to what is connected
Server-side or upper one layer of intermediary routing node send routing request of data；The request of data is for indicating local terminal to received mesh
The demand for the video quality that mark data decode.
3. according to the method described in claim 2, it is characterized in that, described route to the server-side connected or among one layer upper
Node sends routing request of data, comprising:
Determine that upper one layer that local terminal is connected is server-side or intermediary routing node；
In the case where being connect with server-side for one layer on local terminal, according to the received client data request of institute, sent to server-side
Request of data is routed, so that server-side sends target data to local terminal according to the request；
In the case where being connect with intermediary routing node for one layer on local terminal, according to the received client data request of institute, upward one
Layer intermediary routing node sends routing request of data, so that upper one layer of intermediary routing node is according to the side for sending routing request of data
Method upper layer sends routing request of data.
4. according to the method described in claim 2, it is characterized in that, described route to the server-side connected or among one layer upper
Node sends routing request of data, comprising:
Determine the quantity of the connected client of local terminal；
In the case where determining that local terminal connects multiple client, asked according to the client data for connecting each client received
It asks, determines each client to the aggregate demand of video quality；
According to identified aggregate demand, routing request of data is sent to the server-side connected or upper one layer of intermediary routing node.
5. according to the method described in claim 2, it is characterized in that, the method also includes:
Intermediary routing node obtains the client and receives and handle in the case where receiving the client data request of client
The ability of target data；
Judge the corresponding demand of the client data request of the client, if be less than identified ability；
If it is not, then the demand in received client data request is adjusted, so that demand adjusted is no more than institute really
Fixed ability.
6. a kind of Video Multicast System, which is characterized in that the system includes server-side, client and several intermediary routing nodes:
The server-side, according to preset several coded formats, specifies the instruction in the case where receiving multicast instruction
Source data is encoded, and the corresponding several target datas of each coded format are obtained；Wherein, the corresponding number of targets of different coding format
In, including one group of master data and at least one set of enhancing data；
Several target datas are sent to next layer of intermediary routing node by the server-side；
The intermediary routing node that lower layer of the server-side is after several target datas for receiving server-side transmission, according to default
Target data distribution rules are distributed or filter to each target data；
Wherein, the device for being distributed or filtering according to goal-selling data distribution rule includes:
Determine the client whether each target data is sent to next layer of intermediary routing node and/or is connected；In determination
In the case where being sent to next layer of intermediary routing node, which is sent to next layer of intermediary routing node, with
The intermediary routing node is set to continue to distribute or filter the target data according to the device of the distribution or filtering；It is sent determining
To connected client, which is sent to the client；
The client is in the case where receiving the target data of intermediary routing node transmission, if received target data
Including master data and enhancing data, then combined decoding is carried out to master data and enhancing data, it is corresponding to obtain the source data
Enhancing video；If the target data received only includes master data, master data is decoded, obtains the source number
According to corresponding base video；Wherein, enhance the video quality of video better than base video.
7. system according to claim 6, which is characterized in that the system also includes:
Client sends client data request to the intermediary routing node connected；
The intermediary routing node connecting with client is after receiving the client data request of client, to what is connected
Server-side or upper one layer of intermediary routing node send routing request of data；The request of data is for indicating local terminal to received mesh
The demand for the video quality that mark data decode.
8. system according to claim 7, which is characterized in that the intermediary routing node connecting with client specifically leads to
It crosses following manner and sends routing request of data to the server-side connected or upper one layer of intermediary routing node:
Determine that upper one layer that local terminal is connected is server-side or intermediary routing node；
In the case where being connect with server-side for one layer on local terminal, according to the received client data request of institute, sent to server-side
Request of data is routed, so that server-side sends target data to local terminal according to the request；
In the case where being connect with intermediary routing node for one layer on local terminal, according to the received client data request of institute, upward one
Layer intermediary routing node sends routing request of data, so that upper one layer of intermediary routing node is according to send routing request of data
Upper layer of uniting sends routing request of data.
9. system according to claim 7, which is characterized in that the intermediary routing node connecting with client specifically leads to
It crosses following manner and sends routing request of data to the server-side connected or upper one layer of intermediary routing node:
Determine the quantity of the connected client of local terminal；
In the case where determining that local terminal connects multiple client, asked according to the client data for connecting each client received
It asks, determines each client to the aggregate demand of video quality；
According to identified aggregate demand, routing request of data is sent to the server-side connected or upper one layer of intermediary routing node.
10. system according to claim 7, which is characterized in that the system also includes:
Intermediary routing node obtains the client and receives and handle in the case where receiving the client data request of client
The ability of target data；
Judge the corresponding demand of the client data request of the client, if be less than identified ability；
If it is not, then the demand in received client data request is adjusted, so that demand adjusted is no more than institute really
Fixed ability.
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