CN103384236A - Method, device and system for acquiring streaming media data - Google Patents
Method, device and system for acquiring streaming media data Download PDFInfo
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Abstract
The invention provides a method, device and system for acquiring streaming media data. Segment data returned from a media server are stored through a base station, and thus, when the segment data sent to a UE from the base station are lost and the UE sends the same segment request to the base station again, the base station does not send the segment request to the media server any more and sends the stored segment data to the UE. The retransmission delay of empty media data is lowered, and consumption of bandwidth caused by retransmission on a network side is also saved.
Description
Technical field
The present invention relates to wireless communication technology, relate in particular to a kind of method, Apparatus and system that obtains stream medium data.
Background technology
DASH(Dynamic Adaptive Streaming over HTTP, based on the HTTP(HTTP, The Hypertext Transfer Protocol) dynamic self-adapting streaming media transmission technique) be a kind of transmission technology of transmitting video data stream of the dynamic self-adapting network bandwidth.
3GP-DASH(3rd Generation Partnership Project Dynamic AdaptiveStreaming over HTTP, third generation partner program is based on HTTP) client (Client) at first needs to obtain the configuration information of video file, be MPD(Media PresentationDescription, media show to be described) configuration file, comprised the required bandwidth of video of obtaining different quality in this configuration file, client (Client) is according to its bandwidth of network that detects, the corresponding video segment data of bandwidth in the active request configuration file.
Under normal conditions, subscriber equipment first obtains the MPD configuration file, selects video quality according to the configuration of MPD configuration file, and initiates the request of the segment data of acquisition corresponding mass video to the base station.After the base station receives this request, forward this request to media server.Media server sends the segment data of video according to requested content to subscriber equipment by the base station.
But, unstable feature due to wireless channel, segment data is in the transmitting procedure of eating dishes without rice or wine, because the variations of wireless channel is very fast, base station scheduling can not accurately be estimated each channel quality constantly, so the base station may adopt the transformat that is not suitable for current instantaneous state of transmission channel in certain transmitting procedure, and causes bust this, the video data that causes losing must transmit again, and subscriber equipment increases the wait time delay of this segment data.
Summary of the invention
The embodiment of the present invention provides a kind of method, Apparatus and system that obtains stream medium data, for reducing the retransmission delay time of the video data of eating dishes without rice or wine, saves the consumption of the bandwidth that network side causes due to re-transmission.
First aspect, the embodiment of the present invention provide a kind of method of obtaining stream medium data, comprising:
The base station obtains the segment data of video playback from media server;
The described segment data that described base station stored is obtained;
Described base station receives the request of obtaining segment data that at least one subscriber equipment is initiated;
Described base station sends described segment data to the subscriber equipment of initiating request.
Second aspect, the embodiment of the present invention provide a kind of method of obtaining stream medium data, comprising:
Initiate the request obtain segment data to the base station;
Receive the segment data that described base station sends according to described request, described segment data is the segment data that described base station stored is obtained.
The third aspect, the embodiment of the present invention provide a kind of device be used to obtaining stream medium data, comprising:
The segment data acquiring unit is for obtain the segment data of video playback from media server;
Memory cell is used for storing the described segment data that described segment data acquiring unit obtains;
The request receiving unit is used for receiving the request of obtaining segment data that at least one subscriber equipment is initiated;
Segment data Dispatching Unit, the subscriber equipment that is used for the initiation request that receives to the described request receiving element send the described segment data that the described segment data acquiring unit of described cell stores obtains.
Fourth aspect, the embodiment of the present invention provide a kind of system be used to obtaining stream medium data, comprise above-mentioned device be used to obtaining stream medium data.
The 5th aspect, the embodiment of the present invention provide a kind of method of obtaining stream medium data, comprising:
Obtain to include at least one segment data address information and show with the media of the corresponding bandwidth information of described segment data and describe the MPD configuration file;
Select to play statement from described MPD configuration file;
Utilize the broadcast statement generating video of described selection to play the sectional address list;
The basic layer of segment data address acquisition from the list of described video playback sectional address segment data perhaps obtained basic layer segment data and enhancement layer segment data.
The 6th aspect, the embodiment of the present invention provide a kind of device be used to obtaining stream medium data, comprising:
The configuration file acquiring unit is used for obtaining including at least one segment data address information and showing with the media of the corresponding bandwidth information of described segment data and describes the MPD configuration file;
The statement selected cell is used for selecting to play statement from the MPD configuration file that described configuration file acquiring unit obtains;
The list generation unit is used for utilizing the broadcast statement generating video that described statement selected cell is selected to play the sectional address list;
Data capture unit is used for perhaps obtaining basic layer segment data and enhancement layer segment data from the basic layer of the segment data address acquisition segment data of the video playback sectional address list of described list generation unit generation.
The 7th aspect, the embodiment of the present invention provide a kind of device be used to obtaining stream medium data, comprising:
Data demand module is used for the request of obtaining segment data to the base station initiation;
Data reception module is used for receiving described base station according to the segment data of the request transmission of described data demand module, and described segment data is the segment data that described base station stored is obtained.
The method of obtaining stream medium data, Apparatus and system that the embodiment of the present invention provides, the segment data of returning by the base station stored media server, like this, when lose to the segment data that UE sends the base station, when UE sent same segmentation request again to the base station, the base station no longer sent the segmentation request to media server, but the segment data of storage is sent to UE, not only reduce the retransmission delay time of the video data of eating dishes without rice or wine, also saved the consumption of the bandwidth that network side causes due to re-transmission.
Description of drawings
A kind of flow chart that obtains the method for stream medium data that Figure 1A provides for the embodiment of the present invention;
The another kind that Figure 1B provides for the embodiment of the present invention obtains the flow chart of the method for stream medium data;
Fig. 2 is the signaling process figure of the traditional method of obtaining stream medium data;
The flow chart of the method for obtaining stream medium data that Fig. 3 provides for one embodiment of the invention;
The flow chart of the method for obtaining stream medium data that Fig. 4 provides for another embodiment of the present invention;
Fig. 5 embodiment of the present invention provide another obtain the flow chart of the method for stream medium data;
Fig. 6 provide for the embodiment of the present invention another obtain the schematic diagram of signaling process of the method for stream medium data;
The structural representation of a kind of device be used to obtaining stream medium data that Fig. 7 A provides for the embodiment of the present invention;
The another kind that Fig. 7 B provides for the embodiment of the present invention is used for obtaining the structural representation of the device of stream medium data;
Another structural representation for the device that obtains stream medium data that Fig. 8 provides for the embodiment of the present invention.
Embodiment
A kind of flow chart that obtains the method for stream medium data that Figure 1A provides for the embodiment of the present invention.As shown in Figure 1A, comprising:
101, the base station obtains the segment data of video playback from media server (Media Server).
Wherein, the base station can be evolution base station (Evolved NodeB, eNodeB), radio network controller (RNC, Radio Network Controller) etc.Media server can be HTTP Server(HyperText Transfer Protocol Server, hypertext transfer protocol server), PSS Server(Packet Switched Streaming System Server, the packet switched streaming system server) etc.
102, this segment data of obtaining of this base station stored.
103, this base station receives the request of obtaining segment data that at least one subscriber equipment is initiated.
This 103 can be carried out before 101, also can carry out after 102.
104, this base station sends this segment data to the subscriber equipment of initiating request.
Wherein, subscriber equipment can be PSS Client(Packet Switched Streaming System Client, the packet switched streaming system client), HTTP Client(HyperText Transfer Protocol Client, the HTML (Hypertext Markup Language) client), 3GP-DASH Client(3GP-DASH client), UE(UserEquipment, subscriber equipment) etc.
Usually, when subscriber equipment is UE and base station when being eNodeB, obtain the operation of segment data as shown in Figure 2, specifically comprise:
201, UE obtains the MPD configuration file by eNodeB, core net (Core Network, CN) from media server.
202, UE selects video quality according to the configuration information in the MPD configuration file, and the segment data of request corresponding mass video.
203, after eNodeB receives this request, forward this request to media server.The message of carrying this request can be data request information such as the HTTP Get message that UE sends to media server, has comprised the address information of requested date in message, such as URL(Uniform Resource Location, URL(uniform resource locator)).
204, media server sends the segment data of video to UE according to requested content.
205, because the variations of wireless channel is very fast, make base station scheduling can not estimate accurately each channel quality constantly, and cause the base station may adopt the transformat that is not suitable for current instantaneous state of transmission channel in certain transmitting procedure, cause segment data to be lost in the transmitting procedure of eating dishes without rice or wine.
206, UE demand staging data again.
207, after the base station receives this request, forward this request to media server.
208, media server sends the segment data of video to UE according to requested content.
209, UE receives segment data, prepares to play video corresponding to this segment data.
The embodiment of the present invention is improved the base station, the base station not only sends to UE the segment data that media server returns, the segment data returned of medium server also, like this, when lose to the segment data that UE sends the base station, when UE sends same segmentation request again to the base station, the base station no longer sends the segmentation request to media server, but the segment data of storage is sent to UE, not only reduce the retransmission delay time of the video data of eating dishes without rice or wine, also saved the consumption of the bandwidth that network side causes due to re-transmission.
Wherein, the base station can obtain segment data and store this locality into voluntarily in the situation that do not receive UE to the video segment data request, when subscriber equipment is initiated request, the segment data of user equipment requests is found in the base station from the segment data of storage, send to subscriber equipment; Perhaps, the base station also can be according to the request of subscriber equipment, initiate the acquisition request segment data and send to subscriber equipment to video server, and the segment data of obtaining is also stored in the base station, when again initiating to ask in order to subscriber equipment, directly send segment data from this locality, avoid again obtaining segment data.
When the base station obtains voluntarily segment data and stores home base stations into, obtain the segment data of video playback from media server before, also comprise:
This base station obtains media and show to describe the MPD configuration file, and as obtaining the MPD configuration file from media server or UE, the MPD configuration file sees the explanation in hereinafter embodiment illustrated in fig. 6 for details;
Utilize this MPD configuration file generating video to play the segmentation list.
Wherein, this base station obtains media and shows description MPD configuration file, comprise: this base station obtains the MPD configuration file from media server, this MPD configuration file include the individual-layer data address and and the corresponding bandwidth of this individual-layer data, this individual-layer data comprises basic layer segment data and enhancement layer segment data, and the bandwidth corresponding with this enhancement layer segment data is for playing required bandwidth summation or the extra bandwidth value of this enhancement layer segment data.
Utilize this MPD configuration file generating video to play the segmentation list, comprising:
This base station utilizes this individual-layer data address and the bandwidth corresponding with this individual-layer data, generates the list that includes this basic layer segment data address and enhancement layer segment data address.
Correspondingly, the base station obtains the segment data of video playback from media server, comprising: this base station obtains segment data according to described video playback segmentation list from media server.
This base station is after the subscriber equipment of initiating request sends this segment data, and the method for obtaining stream medium data that the embodiment of the present invention provides also can comprise:
This base station receives the request of obtaining segment data that at least one subscriber equipment sends;
The segment data that in the segment data that this base station judgement is stored, whether existing another time request is asked, described another time request is after described base station sends described segment data, the request of obtaining segment data that at least one subscriber equipment of reception sends;
If the segment data of existing another time request request in the segment data of this base station stored, this base station directly sends segment data to the subscriber equipment of initiating this another time request; If there is no the segment data of this another time request request in the segment data of this base station stored, this base station obtains the segment data of this another time request request from this media server, stores and is transmitted to initiating this subscriber equipment for the second time.
The another kind that Figure 1B provides for the embodiment of the present invention obtains the flow chart of the method for stream medium data.The method that the present embodiment provides is the method that user equipment side is obtained stream medium data, as shown in Figure 1B, comprising:
The request of 105, obtaining segment data to the base station initiation.
106, receive the segment data that this base station sends according to this request, the segment data that this segment data is obtained for this base station stored.
Alternatively, before initiating to obtain the request of segment data to the base station, also comprise:
Obtain media and show description MPD configuration file;
Utilize this MPD configuration file generating video to play the segmentation list.
Alternatively, obtain media and show description MPD configuration file, comprising:
Obtain the MPD configuration file from media server, this MPD configuration file includes individual-layer data address and the bandwidth corresponding with this individual-layer data, this individual-layer data comprises basic layer segment data and enhancement layer segment data, and the bandwidth corresponding with this enhancement layer segment data is for playing required bandwidth summation or the extra bandwidth value of this enhancement layer segment data;
Utilize this MPD configuration file generating video to play the segmentation list, comprising:
Utilize this individual-layer data address and the bandwidth corresponding with this individual-layer data, generate the list that includes this basic layer segment data address and enhancement layer segment data address.
In the embodiment of the present invention, subscriber equipment is by receiving segment data from the base station, and this segment data is the segment data that the media server of base station stored returns, thereby when lose to the segment data that UE sends the base station, when UE sent same segmentation request again to the base station, the base station no longer sent the segmentation request to media server, but the segment data of storage is sent to UE, not only reduce the retransmission delay time of the video data of eating dishes without rice or wine, also saved the consumption of the bandwidth that network side causes due to re-transmission.
Be described in further details below by embodiment one, two pairs of methods of obtaining stream medium data of embodiment.
Embodiment one
In the present embodiment, the segment data that the base station obtains voluntarily and store video is play, when subscriber equipment was initiated request, the segment data of user equipment requests was found in the base station from the segment data of storage, and sends to subscriber equipment.
As shown in Figure 3, the method for obtaining stream medium data comprises:
301, evolution base station (eNodeB) obtains the configuration information of video playback.
Wherein, this configuration information that obtains video playback can comprise from MPD configuration file service device and obtaining; Perhaps intercept and capture the MPD configuration file that UE asks; Perhaps UE reports to eNodeB with configuration information corresponding to video that will play.
302, following at least one information of eNodeB foundation, the bandwidth that decides the current video business to use:
The QoS information of business: the priority of business is lower, and bandwidth is less; Otherwise, larger;
The loading condition of current device: present load is larger, and bandwidth is less; Otherwise, larger;
The distance of UE and base station: distance is far away with the base station, and bandwidth is less; Otherwise, larger.
303, the configuration information that obtains according to step 301 of eNodeB and step 302 determine the bandwidth used, the sectional address list that produces video playback.
304, eNodeB according to the sectional address list of the video playback that produces, sends segmentation request (Segment Request) by core network (Core Network, CN) to media server, the segment data of request video playback.
305, after media server received segmentation request from eNodeB, the segment data (Segment Data) that eNodeB is asked sent to eNodeB.
306, eNodeB stores the segment data that obtains into this locality.
307, eNodeB receives the segmentation request to the segment data of some video playback from UE.
308, the segment data of UE request is found in the eNodeB requested segment data of foundation address from the segment data of this locality storage, and sends to UE.
Embodiment two
In the present embodiment, after the base station receives the request of subscriber equipment transmission, obtain and the memory segment data.As shown in Figure 4, the method for obtaining stream medium data comprises:
401, eNodeB receives the segmentation request from UE1, the segment data of request to some video playback.
402, eNodeB receives the segmentation request from UE2, and the segment data of the segment data of this segmentation request request and UE1 request is identical, as during identical video playback segmentation or identical video playback (being same reproduction time section).
403, eNodeB obtains the segment data of UE1, UE2 request.
Particularly, if eNodeB has stored the segment data that UE1, UE2 ask, the direct execution in step 406 of eNodeB;
If eNodeB does not store the segment data that UE1, UE2 ask, eNodeB sends to media server the segmentation request that UE1 initiates by CN, obtains the segment data of UE1 request;
Initiated request if eNodeB has been UE1 to media server, because the segment data of UE2 request is identical with the segment data of UE1 request, eNodeB is no longer that UE2 is to the segmentation request of media server transmission to the same segment data.
Wherein, eNodeB can be according to the address of requested segmentation, judges whether the segment data that UE1 and UE2 ask is identical; Perhaps, eNodeB can be according to address and the profile information of requested segmentation, judges whether segment data that UE1 and UE2 ask whether during the identical broadcast of same video, is namely identical segment data.
404, after media server receives the segmentation request of eNodeB transmission, requested segment data is sent to eNodeB.
405, alternatively, the segment data that arrives of eNodeB storing received.
406, eNodeB sends requested segment data to UE1.
407, eNodeB sends requested segment data to UE2.
In said method embodiment, the segment data that the base station is returned by the medium server, make when the base station and lose to the segment data that UE sends, when UE sends same segmentation request again to the base station, the base station no longer sends the segmentation request to media server, but the segment data of storage is sent to UE, has not only reduced the retransmission delay time of the video data of eating dishes without rice or wine, also lower the propagation delay time of video traffic, also saved the consumption of the bandwidth that network side causes due to re-transmission.
Fig. 5 provide for the embodiment of the present invention another obtain the flow chart of the method for stream medium data.Method in the present embodiment both can be carried out by UE, also can be carried out by the base station, specifically as shown in Figure 5, comprising:
501, obtain include at least one segment data address information and with the MPD configuration file of the corresponding bandwidth information of this segment data.
Wherein, this segment data comprises a basic layer segment data, perhaps comprises a basic layer segment data and at least one enhancement layer segment data;
In this MPD configuration file, basic layer segment data and each enhancement layer segment data dispose respectively one and play statement (representation).
A broadcast statement includes this basic layer of segment data address information and the bandwidth information corresponding with being somebody's turn to do basic layer segment data, perhaps includes an enhancement layer segment data address information and reaches and this bandwidth information that enhancement layer segment data is corresponding;
Wherein, the bandwidth corresponding with this basic layer segment data is for playing the required bandwidth of this basic layer segment data; With this bandwidth that enhancement layer segment data is corresponding, the required bandwidth summation of bottom segment data that relies on for playing the required bandwidth of this enhancement layer segment data and this enhancement layer segment data is perhaps for playing the required extra bandwidth value of this enhancement layer segment data;
This bottom segment data comprises this basic layer segment data, perhaps comprises one or more enhancement layer segment datas that this basic layer segment data and this enhancement layer segment data rely on.
Be divided into basic layer segment data and enhancement layer segment data as a certain segmented video data according to the difference of definition.Namely basic layer segment data can guarantee the basic definition that this segmented video data is play, and that the enhancement layer segment data can have is a plurality of, suppose that basis is from clear to very clear, the first enhancement layer segment data, the second enhancement layer segment data are arranged successively, wherein the broadcast of the first enhancement layer segment data relies on basic layer segment data, and the second enhancement layer segment data relies on basic layer segment data and the first enhancement layer segment data.In other words, the bottom segment data that the first enhancement layer segment data relies on is basic layer segment data and the first enhancement layer segment data for basic layer segment data, the bottom segment data that the second enhancement layer segment data relies on.Correspondingly, supposing to play the required bandwidth of basic layer broadcast segment data is 100kbps, playing the required bandwidth of the first enhancement layer segment data is 120kbps, playing the required bandwidth of the second enhancement layer segment data is 150kbps, so in the MPD configuration file configuration bandwidth corresponding to the first enhancement layer segment data can be expressed as the bandwidth summation be 120kbps, also can be expressed as and play the required extra bandwidth value of this enhancement layer segment data: 120kbps-100kbps=20kbps.In the MPD configuration file, can be expressed as the bandwidth summation be 150kbps to configuration bandwidth corresponding to the second enhancement layer segment data, also can be expressed as and play the required extra bandwidth value of this enhancement layer segment data: 150kbps-120kbps=30kbps.Wherein, every layer of segment data all disposes one and plays statement, provides address information and the corresponding bandwidth information of this layer segment data.
502, select to play statement from this MPD configuration file.
bandwidth in the broadcast statement of selecting is for playing the required bandwidth of this basic layer segment data, perhaps be the required bandwidth of enhancement layer segment data in the broadcast statement of playing this selection, and the required bandwidth summation of bottom segment data that relies on of the enhancement layer segment data in the broadcast of this selection statement, perhaps for adding, the required extra bandwidth value of enhancement layer segment data in the broadcast statement of playing this selection plays the required bandwidth of this baseband layer segment data, and add the required bandwidth of enhancement layer segment data that the enhancement layer segment data in the broadcast statement of playing this selection relies on.
503, utilize the broadcast statement generating video of this selection to play the sectional address list.
This video playback sectional address list comprises the basic layer segment data address corresponding with the bandwidth in the broadcast of this selection statement, perhaps comprises basic layer segment data address that bandwidth in the broadcast statement with this selection is corresponding and all enhancement layer segment datas addresses.
504, the basic layer of the segment data address acquisition from this video playback sectional address list segment data perhaps obtained basic layer segment data and enhancement layer segment data.
Wherein, selecting to play statement from this MPD configuration file can comprise: select the corresponding statement of playing from this MPD configuration file according to the bandwidth that detects.
When above-mentioned steps 501-step 504 is carried out by the base station, also can comprise after above-mentioned steps 504:
The basic layer segment data that storage is obtained perhaps stored basic layer segment data and the enhancement layer segment data obtained;
Receive the request of the segment data of obtaining video playback of subscriber equipment initiation;
Send the basic layer segment data of obtaining, basic layer segment data and the enhancement layer segment data perhaps obtained to the subscriber equipment of initiating request.Specifically see the explanation in embodiment two for details.
As shown in Figure 6, in conjunction with the progressive download on PSS 3GP-DASH(packet switched streaming HTTP and dynamic self-adapting stream) mechanism and 3GPP EPS(3rd Generation PartnershipProject Evolved Packet System, third generation partner program evolved packet system), subscriber equipment obtains before and after the segment data of video playback, and the flow process that subscriber equipment and network side are carried out comprises:
601, UE is before using the 3GP-DASH video traffic, at first needs to be attached in the EPS system, and the PDN that sets up default bearing in attaching process connects.
If UE has been attached in the EPS system, UE initiating business request (Service Request) flow process is set up and being connected of EPS system; If the connection of the PDN at the user need to access video traffic place is not also set up, set up the PDN that this Video service can be provided and connect, and be that subsequent request MPD configuration file is set up and carried; If the MPD configuration file by the HTTP/TCP/IP protocol transmission, is set up TCP by carrying and is connected;
602, UE can utilize the URL address at MPD configuration file place, obtains (HTTP Get) initiation to the request of MPD configuration file by HTTP, and media server is by http response (HTTP Response) feedback MPD configuration file.In the UE side, 3GP-DASH Client obtains the MPD configuration file.
The formation of MPD configuration file has following dual mode:
Under first kind of way, the MPD configuration file comprises Multi-encoding and every kind of video file address that coded system is corresponding, with and required bandwidth information, wherein Multi-encoding can comprise that server end can carry out Multi-encoding to the current video file according to different user's requests or for different transmission bandwidths, such as: according to video resolution height, video quality quality etc.
Under the second way, the MPD configuration file comprises individual-layer data address and corresponding bandwidth information.Because server end can carry out hierarchical coding to the current video file according to different user's requests or for different transmission bandwidths, such as: be basic layer segment data and enhancement layer segment data with Video coding, basic layer segment data comprises the required data of video playback of minimum quality, and the enhancement layer segment data comprises plays the required data of higher-quality video; Therefore, server end is contained in basic layer segment data address packet in configuration file, optionally comprise and play the required bandwidth of basic layer segment data, server is included in the corresponding video data address of one or more enhancement layer segment datas in configuration file, and comprise and play the required bandwidth difference of certain specific enhancement layer segment data, referring to the following code example that provides:
Can be found out by above-mentioned code, for same segmentation video, comprise at least basic layer (base layer) segment data and two enhancement layers (Layer 1 and Layer 2) segment data.The broadcast of Layer 1 is based on base layer, and the broadcast of Layer 2 is based on base layer and Layer 1.
Play statement for being provided with one in every layer of segment data MPD configuration file.Wherein, first plays the broadcast statement that statement (representation) is base layer segment data, comprises and plays the network bandwidth corresponding to base layer and the address of base layer.Play the broadcast statement that statement (representation) is enhancement layer Layer 1 segment data, comprise the network bandwidth of broadcast Layer 1 correspondence and the address of Layer 1 for second.Play the broadcast statement that statement (representation) is enhancement layer Layer 2 segment datas, comprise the network bandwidth of broadcast Layer 2 correspondences and the address of Layer 2 for the 3rd.
The network bandwidth corresponding to basic layer base layer segment data is 100Kbps, Layer 1 and Layer2 are the enhancement layer segment data, the corresponding network bandwidth is the difference of required bandwidth and basic layer bandwidth, be respectively 30Kbps, 20Kbps, that is to say, playing the required network bandwidth of Layer 1 actual be basic layer segment data and bandwidth difference sum, i.e. 130Kbps, and the required network bandwidth of broadcast Layer 2 is actual is 150Kbps.
Or play certain particular enhancement layer and the enhancement layer that relies on thereof and the basic required bandwidth sum of layer video content;
In above-mentioned code, the network bandwidth corresponding to basic layer segment data is constant, and the network bandwidth of enhancement layer segment data Layer 1 and Layer 2 correspondences is plays required real network bandwidth 130Kbps and 150Kbps.
In addition, server can be also a plurality of basic layers with same Video coding, and to each basic layer of each self-corresponding one or more enhancement layer of encoding out; And address and the bandwidth information thereof of the enhancement layer segmentation that address, each basic layer segmentation of the segmentation of a plurality of basic layers is corresponding are kept in the MPD configuration file.
603, after 3GP-DASH Client obtains the MPD configuration file, the MPD configuration file is resolved, produce sectional address list (segment List).
For first kind of way, 3GP-DASH will generate the video segmentation file of corresponding a certain broadcast bandwidth; For the second way, 3GP-DASH will generate the basic layer of corresponding a certain broadcast bandwidth and the video segmentation file of enhancement layer.
604, before initiating demand staging, UE sets up the EPS carrying and connects.May be different because be used for the common QoS from transmission of video of the QoS of transmission MPD file, if different, UE need to set up new carrying for transmission segmentation (Segment), or revises existing carrying.In addition, MPD configuration file place server also may be different from segmentation (Segment) place server, if different, need the TCP that is established to Segment place server for transmission Segment to connect.
605, the Client end according to the sectional address list that produces, begins the demand staging data.In the situation that the uncertain network bandwidth, the video segmentation of the minimum quality that can comprise from the MPD configuration file begins request, or the segmentation of some basic layers begins request; Server (can be http server) responds requested segment data according to the requested address that receives.
Usually, network can be available Maximum Bit Rate of user equipment allocation (Maximum BitRate, MBR), in the situation that need to be to the business speed that provides safeguard, the guarantee bit rate (GBR, Guaranteed BitRate) of a minimum can also be provided for subscriber equipment.But because subscriber equipment may not obtain minimum guarantee bit rate, generally, at first subscriber equipment can attempt asking the corresponding video data of lowest-bandwidth that configures in the MPD configuration file., perceive in the time of can promoting video quality by the detection to request, response when subscriber equipment, subscriber equipment can begin to ask higher-quality video data.Because the resource that network provides can be floated between MBR and GBR, the video quality of user equipment requests also can be along with the change of scheduling resource, and is dynamically adjusted by UE/Client.
606, the Client end is medium to be played with the buffer memory (Buffer) that the segment data that gets is buffered in broadcast.In partitioning transfer of data and playing process, Client need to monitor buffer memory, prevents from asking too much data to cause buffer memory overflow to occur, also will avoid because asking the untimely buffer memory that causes underflow to occur simultaneously, namely occurs playing and interrupts.
607, measure downloading rate.The mode of buffer memory can be avoided occurring interrupting in video display process to a certain extent, but because the variation of network channel is unpredictalbe for Client, Client was difficult to before video playback begins, determine suitable buffer memory and suitable video quality, so the DASH technology allows terminal dynamically to adjust cycle (Period) or the video quality corresponding to segment data of next request.Fairly simple implementation be Client according to the request of each request and the data volume of response, estimate current network end-to-end a bit-rates values.
For the coded system that comprises basic layer, UE can detect to get bandwidth according to it, in the situation that detection bandwidth descends, stops asking the video segment data of enhancement layer; In the situation that detection bandwidth raises, ask the video segment data of the corresponding enhancement layer of higher-quality video;
608, select statement (Representation).For a Period, usually dispose a plurality of statements, each Representation disposes a bandwidth (Bandwidth) attribute, and sign is play the required network bandwidth or the extra bandwidth (difference) of this Representation.Client is according to the estimated bit rate of preceding step 607, dynamically determines follow-up video quality Representation that can normal play;
In the situation that hierarchical coding, representation is some basic layer or the enhancement layer of corresponding video only; And with playing basic layer or the required network bandwidth of enhancement-layer video content, for enhancement layer, this bandwidth can be to play the required bandwidth summation of this enhancement layer, also can make and play the required extra bandwidth value of this enhancement layer.
609, the selected Representation of Client foundation, the address list of generating video segmentation, and partitioning data corresponding to request.
610,3GP-DASH simultaneously standard the QoE feedback mechanism, at first report condition by media server to Client configuration QoE, as Client in playing process, satisfy the report condition of QoE, trigger the report of QoE, because QoE reception server and configuration server can belong to heterogeneous networks equipment, the qos requirement of video data transmitting and QoE report also is not quite similar in addition, therefore, the report of QoE can use independent bearing to be connected with TCP.
In the embodiment of the present invention, obtain the method for stream medium data by data address and the corresponding bandwidth of at least a data in basic layer segment data and enhancement layer segment data in configuration file, make subscriber equipment to play the same segment data of different definition according to bandwidth selection, increased the flexibility that media stream data is play.
One of ordinary skill in the art will appreciate that: all or part of operation that realizes above-mentioned each embodiment of the method can be completed by the hardware that program command is correlated with.Aforesaid program can be stored in a computer read/write memory medium.This program is carried out the operation that comprises above-mentioned each embodiment of the method when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
The structural representation of a kind of device be used to obtaining stream medium data that Fig. 7 A provides for the embodiment of the present invention.In the present embodiment, be the base station for the device that obtains stream medium data, be used for implementing the method that above-mentioned Figure 1A illustrated embodiment provides.As shown in Fig. 7 A, comprise for the device that obtains stream medium data: segment data acquiring unit 71, memory cell 72, request receiving unit 73 and segment data Dispatching Unit 74.
Segment data acquiring unit 71 is used for obtaining from media server the segment data of video playback, and memory cell 72 is used for this segment data that memory segment data capture unit 71 obtains; Request receiving unit 73 is used for receiving the request of obtaining segment data that at least one subscriber equipment is initiated; The subscriber equipment that segment data Dispatching Unit 74 is used for the 73 initiation requests that receive to the request receiving unit sends the segment data that the segment data acquiring unit 71 of these memory cell 72 storages obtains.
It will be understood by those skilled in the art that the base station also should comprise the basic functional units such as Base-Band Processing, signal transmitting and receiving, owing to not being emphasis of the present invention, repeats no more here.
The device for obtaining stream medium data that the embodiment of the present invention provides also can comprise: configuration acquiring unit and segmentation list generation unit.The configuration acquiring unit is used for obtaining the MPD configuration file from media server before the segment data acquiring unit obtains the segment data of video playback from media server; Segmentation list generation unit is used for utilizing MPD configuration file generating video to play the segmentation list.The MPD configuration file sees above-mentioned Fig. 5, the explanation in embodiment illustrated in fig. 6 for details.
Wherein, this configuration acquiring unit can specifically be used for obtaining the MPD configuration file from media server, this MPD configuration file includes individual-layer data address and the bandwidth corresponding with this individual-layer data, this individual-layer data comprises basic layer segment data and enhancement layer segment data, and the bandwidth corresponding with this enhancement layer segment data is for playing required bandwidth summation or the extra bandwidth value of this enhancement layer segment data; This segmentation list generation unit can be specifically be used for utilizing this individual-layer data address and bandwidth corresponding with this individual-layer data, generates the list that includes this basic layer segment data address and enhancement layer segment data address.
The segment data acquiring unit can specifically be used for obtaining segment data according to this video playback segmentation list from media server.
This request receiving unit 73 also is used in the segment data Dispatching Unit after the subscriber equipment of initiating request sends the segment data of obtaining, and the base station receives the request that another subscriber equipment sends.In this case, the device that the embodiment of the present invention provides is used for obtaining stream medium data also can comprise: fragmented storage judging unit and segmentation requesting processing.
This fragmented storage judging unit is used for the segment data of judgement storage, the segment data whether existing another time request is asked, this another time request is for after this base station sends this segment data, the request of obtaining segment data of at least one subscriber equipment transmission of reception.
If this segmentation requesting processing is used for the segment data of existing this another time request request of the segment data of this base station stored, this base station directly sends segment data to the subscriber equipment of initiating this another time request; If there is no the segment data of this another time request request in the segment data of this base station stored, this base station obtains the segment data of this another time request request from this media server, stores and be transmitted to the subscriber equipment of initiating this another time request.
The segment data that above-mentioned base station embodiment obtains by cell stores, make when the base station and lose to the segment data that UE sends, when UE sends same segmentation request again to the base station, the base station need not send the segmentation request to media server again, but the segment data of storage is sent to UE, not only reduce the retransmission delay time of the video data of eating dishes without rice or wine, also saved the consumption of the bandwidth that network side causes due to re-transmission.
The system that the embodiment of the present invention provides can comprise any one base station that above-mentioned base station embodiment provides, the segment data of obtaining by base station stored, make when the base station and lose to the segment data that UE sends, when UE sends same segmentation request again to the base station, the base station need not send the segmentation request to media server again, but the segment data of storage is sent to UE, and not only reduced the retransmission delay time of the video data of eating dishes without rice or wine, also saved the consumption of the bandwidth that network side causes due to re-transmission.
The another kind that Fig. 7 B provides for the embodiment of the present invention is used for obtaining the structural representation of the device of stream medium data.The device that the present embodiment provides is subscriber equipment, as shown in Figure 7, comprising: data demand module 75 and data reception module 76.
Alternatively, the device that the embodiment of the present invention provides is used for obtaining stream medium data also comprises: configuration file acquisition module and list generation module.
The configuration file acquisition module was used for before this data demand module initiates to obtain the request of segment data to the base station, obtained media and showed description MPD configuration file; The list generation module is used for utilizing this MPD configuration file generating video to play the segmentation list.
Alternatively, this configuration file acquisition module specifically is used for obtaining the MPD configuration file from media server, this MPD configuration file includes individual-layer data address and the bandwidth corresponding with this individual-layer data, this individual-layer data comprises basic layer segment data and enhancement layer segment data, and the bandwidth corresponding with this enhancement layer segment data is for playing required bandwidth summation or the extra bandwidth value of this enhancement layer segment data;
This list generation module specifically is used for utilizing this individual-layer data address and bandwidth corresponding with this individual-layer data, generates the list that includes this basic layer segment data address and enhancement layer segment data address.
In the embodiment of the present invention, receive segment data by data reception module from the base station for the device that obtains stream medium data, and this segment data is the segment data that the media server of base station stored returns, thereby when lose to the segment data that UE sends the base station, when UE sends same segmentation request again to the base station, the base station no longer sends the segmentation request to media server, but the segment data of storage is sent to UE, not only reduce the retransmission delay time of the video data of eating dishes without rice or wine, also saved the consumption of the bandwidth that network side causes due to re-transmission.
Another structural representation for the device that obtains stream medium data that Fig. 8 provides for the embodiment of the present invention.In the present embodiment, the device that is used for obtaining stream medium data can be UE for the method that provides embodiment illustrated in fig. 5 is provided, also can be the base station, as shown in Figure 8, comprising: configuration file acquiring unit 81, statement selected cell 82, list generation unit 83 and data capture unit 84.
Configuration file acquiring unit 81 be used for obtaining comprise at least one have the segment data address information and with the MPD configuration file of the corresponding bandwidth information of this segment data.
This segment data comprises a basic layer segment data, perhaps comprises a basic layer segment data and at least one enhancement layer segment data.
In this MPD configuration file, basic layer segment data and each enhancement layer segment data dispose respectively one and play statement.
A broadcast statement includes this basic layer of segment data address information and the bandwidth information corresponding with being somebody's turn to do basic layer segment data, perhaps includes an enhancement layer segment data address information and reaches and this bandwidth information that enhancement layer segment data is corresponding;
The bandwidth corresponding with this basic layer segment data is for playing the required bandwidth of this basic layer segment data; With this bandwidth that enhancement layer segment data is corresponding, for playing this bandwidth that enhancement layer segment data is required, and the required bandwidth summation of bottom segment data that relies on of this enhancement layer segment data, perhaps for playing the required extra bandwidth value of this enhancement layer segment data;
This bottom data comprises this basic layer segment data, perhaps comprises one or more enhancement layer segment datas that this basic layer segment data and this enhancement layer segment data rely on, see for details Fig. 5 and embodiment illustrated in fig. 6 in explanation.
Statement selected cell 82 is used for selecting to play statement from the MPD configuration file that this configuration file acquiring unit 81 obtains.bandwidth in the broadcast statement of selecting is for playing the required bandwidth of this basic layer segment data, perhaps be the required bandwidth of enhancement layer segment data in the broadcast statement of playing this selection, and the required bandwidth summation of bottom segment data that relies on of the enhancement layer segment data in the broadcast of this selection statement, perhaps for adding, the required extra bandwidth value of enhancement layer segment data in the broadcast statement of playing this selection plays the required bandwidth of this baseband layer segment data, and add the required bandwidth of enhancement layer segment data that the enhancement layer segment data in the broadcast statement of playing this selection relies on.Can specifically be used for selecting the corresponding statement of playing according to the bandwidth that detects from this MPD configuration file as this statement selected cell 82.
When this is the base station for the device that obtains stream medium data, also can comprise: memory cell, request receiving unit and data transmission unit.
Memory cell is used for the basic layer segment data that storage is obtained, and perhaps stores basic layer segment data and the enhancement layer segment data obtained; The request receiving unit is used for the request of the segment data of obtaining video playback of reception subscriber equipment initiation; Data transmission unit is used for sending the basic layer segment data of obtaining, basic layer segment data and the enhancement layer segment data perhaps obtained to the subscriber equipment of initiating request.
In the embodiment of the present invention, be used for obtaining the device of stream medium data by data address and the corresponding bandwidth of at least a data in configuration file basic layer segment data and enhancement layer segment data, make subscriber equipment to play the same segment data of different definition according to bandwidth selection, increased the flexibility that media stream data is play.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although with reference to aforementioned each embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (30)
1. a method of obtaining stream medium data, is characterized in that, comprising:
The base station obtains the segment data of video playback from media server;
The described segment data that described base station stored is obtained;
Described base station receives the request of obtaining segment data that at least one subscriber equipment is initiated;
Described base station sends described segment data to the subscriber equipment of initiating request.
2. method according to claim 1, is characterized in that, the base station also comprises before obtaining the segment data of video playback from media server:
Described base station obtains media and shows description MPD configuration file;
Utilize described MPD configuration file generating video to play the segmentation list.
3. method according to claim 2, is characterized in that, described base station obtains media and shows description MPD configuration file, comprising:
Described base station obtains the MPD configuration file from media server, described MPD configuration file includes individual-layer data address and the bandwidth corresponding with described individual-layer data, described individual-layer data comprises basic layer segment data and enhancement layer segment data, and the bandwidth corresponding with described enhancement layer segment data is for playing required bandwidth summation or the extra bandwidth value of described enhancement layer segment data;
Utilize described MPD configuration file generating video to play the segmentation list, comprising:
Described base station utilizes described individual-layer data address and the bandwidth corresponding with described individual-layer data, generates the list that includes described basic layer of segment data address and enhancement layer segment data address.
4. method according to claim 2, is characterized in that, the base station obtains the segment data of video playback from media server, comprising:
Described base station obtains segment data according to described video playback segmentation list from media server.
5. according to claim 1-4 described methods of any one, is characterized in that, described base station also comprises after the subscriber equipment of initiating request sends described segment data:
Described base station receives the request of obtaining segment data that at least one subscriber equipment sends;
In the segment data that the judgement of described base station is stored, the segment data whether existing another time request is asked, described another time request is after described base station sends described segment data, the request of obtaining segment data that at least one subscriber equipment of reception sends;
If the segment data of existing described another time request request in the segment data of described base station stored, described base station directly sends segment data to the subscriber equipment of initiating described another time request; If there is no the segment data of described another time request request in the segment data of described base station stored, described base station obtains the segment data of described another time request request from described media server, stores and be transmitted to the subscriber equipment of initiating described another time request.
6. a method of obtaining stream medium data, is characterized in that, comprising:
Initiate the request obtain segment data to the base station;
Receive the segment data that described base station sends according to described request, described segment data is that described base station obtains and stores from media server.
7. method according to claim 6, is characterized in that, before initiating to obtain the request of segment data to the base station, also comprises:
Obtain media and show description MPD configuration file;
Utilize described MPD configuration file generating video to play the segmentation list.
8. method according to claim 7, is characterized in that, obtains media and show and describe the MPD configuration file, comprising:
Obtain the MPD configuration file from media server, described MPD configuration file includes individual-layer data address and the bandwidth corresponding with described individual-layer data, described individual-layer data comprises basic layer segment data and enhancement layer segment data, and the bandwidth corresponding with described enhancement layer segment data is for playing required bandwidth summation or the extra bandwidth value of described enhancement layer segment data;
Utilize described MPD configuration file generating video to play the segmentation list, comprising:
Utilize described individual-layer data address and the bandwidth corresponding with described individual-layer data, generate the list that includes described basic layer of segment data address and enhancement layer segment data address.
9. a device that is used for obtaining stream medium data, is characterized in that, comprising:
The segment data acquiring unit is for obtain the segment data of video playback from media server;
Memory cell is used for storing the described segment data that described segment data acquiring unit obtains;
The request receiving unit is used for receiving the request of obtaining segment data that at least one subscriber equipment is initiated;
Segment data Dispatching Unit, the subscriber equipment that is used for the initiation request that receives to the described request receiving element send the described segment data that the described segment data acquiring unit of described cell stores obtains.
10. device according to claim 9, is characterized in that, described device also comprises:
The configuration acquiring unit was used for before described segment data acquiring unit obtains the segment data of video playback from media server, obtained media and showed description MPD configuration file;
Segmentation list generation unit is used for utilizing the MPD configuration file generating video that described configuration acquiring unit obtains to play the segmentation list.
11. device according to claim 10, it is characterized in that, described configuration acquiring unit specifically is used for obtaining the MPD configuration file from media server, described MPD configuration file includes individual-layer data address and the bandwidth corresponding with described individual-layer data, described individual-layer data comprises basic layer segment data and enhancement layer segment data, and the bandwidth corresponding with described enhancement layer segment data is for playing required bandwidth summation or the extra bandwidth value of described enhancement layer segment data;
Described segmentation list generation unit specifically is used for utilizing described individual-layer data address and the bandwidth corresponding with described individual-layer data, generates the list that includes described basic layer of segment data address and enhancement layer segment data address.
12. device according to claim 10 is characterized in that, described segment data acquiring unit specifically is used for obtaining segment data according to described video playback segmentation list from media server.
13. according to claim 9-12 described devices of any one is characterized in that, described device also comprises:
The described request receiving element is used at described segment data Dispatching Unit receiving the request of obtaining segment data that at least one subscriber equipment sends after the subscriber equipment of initiating request sends described segment data;
The fragmented storage judging unit, the segment data that is used for the judgement storage, the segment data whether existing another time request is asked, described another time request is after described segment data Dispatching Unit sends described segment data, the request of obtaining segment data that at least one subscriber equipment that the described request receiving element receives sends;
The segmentation requesting processing if be used for the segment data of existing described another time request of the segment data of described cell stores request, directly sends segment data to the subscriber equipment of initiating described another time request; If there is no the segment data of described another time request request in the segment data of described cell stores, obtain the segment data of described another time request request from described media server, store and be transmitted to the subscriber equipment of initiating described another time request.
14. a system that is used for obtaining stream medium data is characterized in that, comprises the described device be used to obtaining stream medium data of the claims 9-13 any one.
15. a method of obtaining stream medium data is characterized in that, comprising:
Obtain to include at least one segment data address information and show with the media of the corresponding bandwidth information of described segment data and describe the MPD configuration file;
Select to play statement from described MPD configuration file;
Utilize the broadcast statement generating video of described selection to play the sectional address list;
The basic layer of segment data address acquisition from the list of described video playback sectional address segment data perhaps obtained basic layer segment data and enhancement layer segment data.
16. method according to claim 15, it is characterized in that, in described MPD configuration file, a described segment data comprises a basic layer segment data, perhaps comprise a basic layer segment data and at least one enhancement layer segment data, in described MPD configuration file, basic layer segment data and each enhancement layer segment data dispose respectively one and play statement.
17. method according to claim 16, it is characterized in that, a broadcast statement comprises the bandwidth information that described basic layer segment data address information reaches and described basic layer segment data is corresponding, perhaps comprises an enhancement layer segment data address information and reaches and a described bandwidth information that the enhancement layer segment data is corresponding;
Wherein, the bandwidth corresponding with described basic layer segment data is for playing the required bandwidth of described basic layer segment data; With a described bandwidth that the enhancement layer segment data is corresponding, the required bandwidth summation of bottom segment data that relies on for playing a described enhancement layer segment data and a described enhancement layer segment data is perhaps for playing the required extra bandwidth value of a described enhancement layer segment data;
Described bottom data comprises described basic layer segment data, perhaps comprises one or more enhancement layer segment datas that described basic layer segment data and a described enhancement layer segment data rely on.
18. method according to claim 15, it is characterized in that, the list of described video playback sectional address comprises the basic layer segment data address corresponding with the bandwidth in the broadcast of described selection statement, perhaps comprises basic layer segment data address that bandwidth in the broadcast statement with described selection is corresponding and all enhancement layer segment datas addresses.
19. method according to claim 15 is characterized in that, selects to play statement from described MPD configuration file, comprising:
Select the corresponding statement of playing from described MPD configuration file according to the bandwidth that detects.
20. according to claim 16 or 17 described methods is characterized in that, described method also comprises:
The basic layer segment data that storage is obtained perhaps stored basic layer segment data and the enhancement layer segment data obtained;
Receive the request of the segment data of obtaining video playback of subscriber equipment initiation;
Send the basic layer segment data of obtaining, basic layer segment data and the enhancement layer segment data perhaps obtained to the subscriber equipment of initiating request.
21. a device that is used for obtaining stream medium data is characterized in that, comprising:
The configuration file acquiring unit is used for obtaining including at least one segment data address information and showing with the media of the corresponding bandwidth information of described segment data and describes the MPD configuration file;
The statement selected cell is used for selecting to play statement from the MPD configuration file that described configuration file acquiring unit obtains;
The list generation unit is used for utilizing the broadcast statement generating video that described statement selected cell is selected to play the sectional address list;
Data capture unit is used for perhaps obtaining basic layer segment data and enhancement layer segment data from the basic layer of the segment data address acquisition segment data of the video playback sectional address list of described list generation unit generation.
22. device according to claim 21, it is characterized in that, in described MPD configuration file, a described segment data comprises a basic layer segment data, perhaps comprise a basic layer segment data and at least one enhancement layer segment data, in described MPD configuration file, basic layer segment data and each enhancement layer segment data dispose respectively one and play statement.
23. device according to claim 22, it is characterized in that, a broadcast statement comprises the bandwidth information that described basic layer segment data address information reaches and described basic layer segment data is corresponding, perhaps comprises an enhancement layer segment data address information and reaches and a described bandwidth information that the enhancement layer segment data is corresponding;
Wherein, the bandwidth corresponding with described basic layer segment data is for playing the required bandwidth of described basic layer segment data; With a described bandwidth that the enhancement layer segment data is corresponding, the required bandwidth summation of bottom segment data that relies on for playing a described enhancement layer segment data and a described enhancement layer segment data is perhaps for playing the required extra bandwidth value of a described enhancement layer segment data;
Described bottom data comprises described basic layer segment data, perhaps comprises one or more enhancement layer segment datas that described basic layer segment data and a described enhancement layer segment data rely on.
24. device according to claim 21, it is characterized in that, the list of described video playback sectional address comprises the basic layer segment data address corresponding with the bandwidth in the broadcast of described selection statement, perhaps comprises basic layer segment data address that bandwidth in the broadcast statement with described selection is corresponding and all enhancement layer segment datas addresses.
25. device according to claim 21 is characterized in that, described statement selected cell specifically is used for selecting the corresponding statement of playing according to the bandwidth that detects from described MPD configuration file.
26. according to claim 21-25 described devices of any one is characterized in that described device is subscriber equipment or base station.
27. device according to claim 26 is characterized in that, described device also comprises:
Memory cell is used for the basic layer segment data that storage is obtained, and perhaps stores basic layer segment data and the enhancement layer segment data obtained;
The request receiving unit is used for the request of the segment data of obtaining video playback of reception subscriber equipment initiation;
Data transmission unit is used for sending the basic layer segment data of obtaining, basic layer segment data and the enhancement layer segment data perhaps obtained to the subscriber equipment of initiating request.
28. a device that is used for obtaining stream medium data is characterized in that, comprising:
Data demand module is used for the request of obtaining segment data to the base station initiation;
Data reception module is used for receiving described base station according to the segment data of the request transmission of described data demand module, and described segment data is that described base station obtains and stores from media server.
29. described device, is characterized in that according to claim 28, described device also comprises:
The configuration file acquisition module was used for before described data demand module initiates to obtain the request of segment data to the base station, obtained media and showed description MPD configuration file;
The list generation module is used for utilizing described MPD configuration file generating video to play the segmentation list.
30. described device according to claim 29, it is characterized in that, described configuration file acquisition module specifically is used for obtaining the MPD configuration file from media server, described MPD configuration file includes individual-layer data address and the bandwidth corresponding with described individual-layer data, described individual-layer data comprises basic layer segment data and enhancement layer segment data, and the bandwidth corresponding with described enhancement layer segment data is for playing required bandwidth summation or the extra bandwidth value of described enhancement layer segment data;
Described list generation module specifically is used for utilizing described individual-layer data address and the bandwidth corresponding with described individual-layer data, generates the list that includes described basic layer of segment data address and enhancement layer segment data address.
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Application publication date: 20131106 |