CN106412701A - Video transmission method, access device and network device - Google Patents
Video transmission method, access device and network device Download PDFInfo
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- CN106412701A CN106412701A CN201510437063.8A CN201510437063A CN106412701A CN 106412701 A CN106412701 A CN 106412701A CN 201510437063 A CN201510437063 A CN 201510437063A CN 106412701 A CN106412701 A CN 106412701A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
- H04N21/26216—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving the channel capacity, e.g. network bandwidth
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
- H04N21/26233—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving content or additional data duration or size, e.g. length of a movie, size of an executable file
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
- H04N21/64738—Monitoring network characteristics, e.g. bandwidth, congestion level
Abstract
The embodiment of the present invention provides a video transmission method. The video transmission method comprises the steps of after a video watching request is generated, obtaining the video length of a currently required video appointed by the video watching request, and obtaining the time interval of a previously watched video and the currently required video; according to the video length and the time interval, determining the first quality grade set for a first fragment of the currently required video according to the data rate of the previously watched video when the joint video transmission adaption is executed for the currently required video, and transmitting the first fragment according to the first quality grade.
Description
Technical field
The present invention relates to video transmission technologies, espespecially a kind of video transmission method, and support that this video passes
The access device of transmission method and the network equipment.
Background technology
It is currently, there are multiple different video transmission technologies, such as progressive download (PD, progressive
Download), RTP/real time streaming transport protocol (RTP/RTSP), code stream self adaptation (HAS,
HTTP Adaptive Streaming) etc. streaming media transmission technique.It may be noted that video herein can refer to
Based on dynamic image, may also include the number of the media informations such as text, audio frequency, figure, image, animation
Word file.
For above-mentioned streaming media transmission technique, with watching in downloading video files per family, and not
Whole video file download must be waited to finish and can open viewing.RTP/RTSP and HAS technology can pass
Change video quality, PD and HAS technology does not then need special video server during defeated.
Existing HAS technology combines stream media technology and the spy of HTTP progressive download play-back technology
Point, transmits media content to user in the way of HTTP.Broadcast using the media that this technology can lift user
Put experience, reduce the technical sophistication degree of video server simultaneously.In HAS technology, each video file
It is divided into multiple fragments, the speed of download of a upper fragment is used for determining the data rate (ratio of next fragment
As bit rate etc.).When determining the data rate of initial segment, HAS technology is it is not intended that current net
Network condition, but all the time from the beginning of minimum transmission quality, slowly lift the transmission matter of further fragments step by step
Amount, until it reaches preferably transmission quality, this process may continue tens seconds.Such as, transmission quality from
230 kilobits per seconds (kbps) are transferred to 331kbps on starting, more progressively on be transferred to 991kbps, 1427kbps,
Finally just reach preferable transmission quality 2056kbps.
Content of the invention
Embodiments provide a kind of video transmission method, access device and the network equipment, be used for carrying
High video transmission quality.
In an embodiment of the invention, a kind of video transmission method includes：
After viewing video request generates, obtain this current request video specified by viewing video request
Video length, and obtain the time interval of previous viewing video and described current request video；
Judging to execute connection for described current request video according to described video length and described time interval
When closing transmission of video adaptation, described current request is arranged according to the data rate of described previous viewing video and regards
First credit rating of the first fragment of frequency, and this first fragment is transmitted according to this first credit rating.
In another embodiment, a kind of access device includes：
Information acquisition unit, for receiving the viewing video request of videoconference client offer, obtains and previously watched
Time interval between video and this current request video indicated by viewing video request, and from Video service
The video length of described current request video is obtained in the source list file that device provides；
Joint video transmits adaptation unit, for being judged whether according to described time interval and described video length
Carry out joint video transmission adaptation, and will determine that result is sent to suggestion credit rating and provides unit；
Described suggestion credit rating provides unit, for regarding with described previous viewing according to described judged result
First matter of the first fragment as described current request video for the suggestion credit rating of the data rate association of frequency
Amount grade is supplied to described video server.
In another embodiment of the present invention, a kind of network equipment includes：
Information acquisition unit, for receiving viewing video request, obtains previously viewing video and this viewing and regards
Frequency asks the time interval between indicated current request video, and the source list file from generation
The middle video length obtaining described current request video；
Joint video transmits adaptation unit, for being judged according to described time interval and described video length to be
The no joint video that carries out transmits adaptation, and will determine that result is sent to suggestion credit rating and provides unit；
Described suggestion credit rating provides unit, in the case of being to be in described judged result, according to
The data rate of described previous viewing video obtains suggestion credit rating, is supplied to access device.
Brief description
Fig. 1 is the schematic flow sheet of video transmission method in one embodiment of the invention；
Fig. 2 is that the composition of previously viewing video and current request video in one embodiment of the invention is illustrated
Figure；
Fig. 3 is the schematic network structure in one embodiment of the invention for transmission of video；
Fig. 4 is the schematic flow sheet of video transmission method in one embodiment of the invention；
Fig. 5 is the schematic flow sheet of video transmission method in one embodiment of the invention；
Fig. 6 is the schematic flow sheet of video transmission method in one embodiment of the invention；
Fig. 7 is the schematic flow sheet of video transmission method in one embodiment of the invention；
Fig. 8 is the structural representation of access device in one embodiment of the invention；
Fig. 9 is the structural representation of access device in one embodiment of the invention；
Figure 10 is the structural representation of the network equipment in one embodiment of the invention；
Figure 11 is the structural representation of the network equipment in one embodiment of the invention；
Figure 12 is the structural representation of access device in one embodiment of the invention；
Figure 13 is the structural representation of the network equipment in one embodiment of the invention.
Specific embodiment
For making the objects, technical solutions and advantages of the present invention become more apparent, develop simultaneously referring to the drawings
Embodiment, the present invention is described in more detail.
HAS technology is more time-consuming for the adjustment of transmission quality, especially in the situation that video file is shorter
Under, may after being adjusted to preferable transmission quality soon, the broadcasting of this video file also will come to an end.Can
It is that, in existing video file program request, short-sighted frequency obtains all the more the favor of user.Short-sighted frequency refers to
The shorter video file of video length, such as video length are less than 1 minute (m), are less than 2m, are less than
5m, the video file less than 10m etc..For this reason, embodiments providing a kind of transmission of video side
Method, as shown in figure 1, include following operation, to improve video transmission quality.
In step 101, after watching video request generation, obtain this current request specified by viewing video request
The video length of video.
In step 102, obtain the time interval previously watching video and described current request video.Wherein, first
Front viewing video is a upper requested video file watched before this viewing video request generates.
In step 103, judged for described current request according to described video length and described time interval
During video execution joint video transmission adaptation, described in the data rate setting according to described previous viewing video
First credit rating (QL, quality level) of the first fragment of current request video.Wherein, previously
The data rate of viewing video is actual video transmission rate.
It may be noted that the first credit rating is the first fragment corresponding Video coding speed of current request video
Rate.In one example, this first credit rating is related to the data rate of previous viewing video.Such as,
First credit rating is set to equal with the data rate of the last fragment previously watching video.And for example,
The data rate of all fragments of previous viewing video is smoothed, thus calculating this first mass etc.
Level.For another example, for one weight of data rate allocation of each fragment of previous viewing video, previously watched
The weight of the first fragment of video is minimum, and previously the weight of the last fragment of viewing video was maximum, then to elder generation
The data rate of all fragments of front viewing video is weighted suing for peace, and obtains this first credit rating.
In step 104, this first fragment is transmitted according to this first credit rating.
It may be noted that each video file is divided into multiple fragments, video consumer in video server
End can obtain the content of each fragment one by one.Fig. 2 is previously to have watched video in one embodiment of the invention
Composition schematic diagram with current request video.In fig. 2, previously viewing video is divided into N number of fragment,
Specifically include：First fragment, the second fragment ..., N fragment.Current request video is also divided into
First fragment, the second fragment ..., N fragment.Wherein, a fragment, N piece headed by the first fragment
Section is last fragment, and other fragments in addition to the first fragment and last fragment are intermediate segment.In this Shen
Also other fragments in addition to first fragment please be referred to as further fragments in the explanation of embodiment.At one
In example, the duration of each fragment can be 2 seconds (s)；Correspondingly, when, a length of 1 minute (m's) is short
Video can be divided into 30 fragments.Figure it is seen that previously having watched video and current request video
Between there is certain time interval.
In one example, the judgement carrying out for joint video transmission adaptation that step 103 refers to can be wrapped
Include：The whether judgement of short-sighted frequency, and the judgement of whether continuous videos.Specifically, will be long for described video
Degree and the length threshold pre-setting are compared, and judge whether this current request video is short-sighted frequency.This
Outward, described time interval is compared with pre-set interval thresholding, judges this current request video
Whether it is continuous videos with described previous viewing video.When the described current request video of determination is short-sighted frequency,
And described current request video is when being continuous videos with described previous viewing video, it is defined as described currently please
Video is asked to carry out joint video transmission adaptation.
That is, for the shorter feelings of the time interval between current request video and previous viewing video
Condition, can be according to the first of the first fragment of the data rate setting current request video of previous viewing video
Credit rating.Such as, can be current according to the second credit rating setting of the last fragment of previous viewing video
First credit rating of the first fragment of request video.That is, by the last fragment of previous viewing video and
The data rate of the first fragment of current request video associates, and realizes data between multiple transmission of videos
Speed combine adaptation.The embodiment of the present invention considers the generally contiguous situation watching multiple short-sighted frequencies of user,
Using the transmission quality adaptation across multiple video files, it is to avoid open from minimum transmission quality in HAS technology
Begin to attempt, reach the time-consuming longer problem of preferable transmission quality.
In one example, judgement joint transmission of video adaptation being carried out still further comprises：According to prominent
Send out flow status and judge whether the burst flow of network is low, work as described when described burst flow is low
Front request video carries out joint video transmission adaptation.
It may be noted that burst flow is typically to be added by user or leaves what network caused, or by business
Establishment of connection or disconnect causes.The communication network of public place is easier burst flow, than
As coffee-house, campus, railway station etc..Because user terminal (UE) is to be connected by access device
To network, therefore access device can count to burst flow, thus obtaining burst flow state,
In order to carry out the judgement of joint video transmission adaptation.Such as, burst flow can be：There are 2 per hour
UE adds, 3 UE leave, or has 20 UE additions, 25 UE to leave per hour, or
Person has 20 UE additions, 25 UE to leave per half an hour, or every 15 minutes have 20 UE
Add, 25 UE leave." there are 2 by the comparison with burst thresholding it may be determined that going out per hour
UE adds, 3 UE leave " belong to the low situation of burst flow.In implementing, happen suddenly thresholding
Can be configured according to network capacity, user situation etc. and adjust.
In one example, after video server receives described viewing video request, by source list file
It is supplied to access device.Wherein, described source list file record has the video of described current request video long
Degree, and the optional set of data rates of videoconference client.In one example, source list file be by
Video encoder generates.Support how many kinds of data speed it becomes possible to determine after video encoder completes coding
Rate.When implementing, in source list file record set of data rates be 230,331,477,688,
991,1427,2056,2962 }, unit is kbps.Correspondingly, video encoder can be every kind of data speed
Rate generates corresponding video file, downloads for videoconference client.
Access device, will after receiving the request of first fragment of the acquisition video that this videoconference client sends
In the described request of first fragment obtaining video, described first credit rating that carries is revised as pre-saving
Suggestion credit rating, then the request of the described first fragment obtaining video is sent to described video server.
Wherein, described suggestion credit rating is configured according to the data rate of described previous viewing video.
Further, described access device receives the last of the acquisition video that described videoconference client sends
After the request of fragment, the second credit rating carrying in the request according to the last fragment of this acquisition video sets
Put described suggestion credit rating, and record the reception time of the described request of last fragment obtaining video.
In one example, after video server receives described viewing video request, by source list file
It is supplied to access device.Wherein, described source list file record has the video of described current request video long
Degree, and the optional set of data rates of videoconference client.Described access device is judging described burst flow
Measure for low when, preserve described source list file, and the minimum data rate in this source list file repaiied
It is changed to suggestion credit rating and obtains pseudo- inventory file, described puppet inventory file is supplied to described videoconference client.
Wherein, described suggestion credit rating is configured according to the data rate of described previous viewing video.Described regard
Frequency client selects described first credit rating according to described puppet inventory file, and initiates to carry described first matter
The request of the first fragment of acquisition video of amount grade.Such as, the set of data rates in source list file
For { 230,331,477,688,991,1427,2056,2962 }, videoconference client can therefrom select
As described first credit rating, such as videoconference client may select 230kbps to one data rate.But,
Through the modification of access device, the set of data rates in the pseudo- inventory file that videoconference client receives is
{ 688,991,1427,2056,2962 }, then videoconference client would not reselection 230kbps, but
At least select 688kbps as described first credit rating, thus shorten passing to preferable from minimum transmission quality
The trial time of transmission quality.
In one example, after described video server receives the request of first fragment of described acquisition video,
Issue the first fragment of video according to described first credit rating to described access device.Described access device exists
Increase inventory file update notification in the first fragment of the described video receiving.Described access device will carry
After the first fragment having the described video of this inventory file update notification is sent to described videoconference client, will be from
Body preserve described source list file be sent to described videoconference client so that described videoconference client according to
The further fragments of described source list file request video.Further, described in described access device receives
After the request of last fragment of acquisition video that videoconference client sends, by the last fragment of this acquisition video
The second credit rating carrying in request saves as described suggestion credit rating, and records described acquisition video
The reception time of the request of last fragment, for determining the time interval with next request video.
In one example, the burst flow state that itself is detected by access device is sent to video server.
Described video server according to described burst flow condition adjudgement go out network burst flow be low when, according to institute
The data rate stating previous viewing video obtains suggestion credit rating, generates this suggestion credit rating as
The pseudo- inventory file of low data rate is supplied to described access device.It may be noted that video server is to video
After the source list file that encoder provides is modified, obtain described puppet inventory file.Described access device
This pseudo- inventory file is sent to videoconference client so that described videoconference client is according to described puppet inventory file
The first fragment of request video.
In one example, video server, after the request receiving the first fragment obtaining video, will regard
The first fragment of frequency is supplied to described access device, carries inventory file more in the first fragment of described video
New notice.Described video server, after the first fragment of described video sends, sends to described access device
Source list file.Described access device send described source list file to described videoconference client so that
Described videoconference client is according to the further fragments of described source list file request video.
In one example, burst flow state is passed through Wireless network congestion perceptive function unit by access device
(RCAF, RAN Congestion Awareness Function) is sent to Policy and Charging Rules Function
(PCRF, Policy and Charging Rules Function).Described PCRF is according to described burst flow shape
State judge network burst flow be low when, indicate packet data gateway (PGW, Packet Data Network
Gateway) use the data rate of described previous viewing video.Described PGW is according to this previous viewing video
Data rate determine ensure bit rate (GBR, Guaranteed Bit Rate), by this GBR pass through hold
Load is set up request and is supplied to access device.Described access device connects reconfiguration instructions by RRC will be described
GBR is sent to videoconference client.Described videoconference client is according to the source list receiving at access device
File judges whether described current request video is short-sighted frequency, if it is arranges the first matter according to described GBR
Amount grade, sends the first fragment of acquisition video carrying described first credit rating to described access device
Request.
Fig. 3 illustrates to be used for the schematic network structure of transmission of video in one embodiment of the invention.Video consumer
End 311 and 321 (can be the user terminals such as mobile phone, panel computer) are connected to by access device 302
PGW 303, then video server 304 is connected to by PGW 303.The following examples are with HAS client
As a example HAS server, description is launched to technical scheme.It may be noted that the embodiment of the present invention
The scheme providing is except applying in HAS client and HAS server it is also possible to apply in other types
Videoconference client 311 and video server 304 on.In one example, access device 302 can be base
Stand.In a further implementation, access device is alternatively WAP (AP), radio network gateway etc. and is used for connecting use
The other equipment of family terminal server.
Embodiment one
Fig. 4 is the schematic flow sheet of video transmission method in one embodiment of the invention, is passed by base station
The control of transmission quality.
In step 401, HAS client sends viewing video request to base station.In one example, should
Viewing video request is that HTTP (HTTP, Hypertext Transfer Protocol) is asked.
In step 402, this viewing video request is sent to HAS server process by base station.In step 403,
Base station obtains the time interval between current request video and previous viewing video.
In step 404, according to viewing video request, HAS server obtains source list file (original
Manifest file) it is supplied to base station.In step 405, this source list file is sent to HAS by base station
Client.In one example, this source list file record has video general information, and such as video is long
Degree, set of data rates etc..
In step 406, base station judges current request video and previous viewing video according to described time interval
Whether belong to continuous videos.In step 407, base station judges current request video according to source list file
Whether it is short-sighted frequency.If to be that base station is in step 408 for step 406 and 407 judged result
After receiving the request of first fragment (segment) of acquisition video of HAS client transmission, in step
Determine whether in rapid 409 whether burst flow (traffic burst) is low.In one example, obtain
The request obtaining the first fragment of video carries the first credit rating (QL, quality level), and this first
QL is that first fragment is specified by HAS client according to source list file.In one example,
In step 409, the judgement of burst flow height can be realized by arranging threshold value, is then prominent higher than burst thresholding
Send out flow high, be then that burst flow is low less than burst thresholding.
When burst flow is low, in step 410, a QL is revised as suggestion QL by base station.In step
411, base station sends the request of the amended first fragment obtaining video, this request to HAS server
Carry suggestion QL.In one example, base station is possible with formerly watching each fragment of video
Data rate carries out the setting of a QL, the such as data rate to each fragment formerly watching video
Carry out smoothing and obtain a QL.
In step 412, HAS server issues the first fragment of video according to suggestion QL to base station.?
Step 413, the first fragment of video is supplied to HAS client by base station.
Subsequently, HAS client sends the request of the further fragments obtaining video to base station, each request
The corresponding QL that HAS client is specified can be carried.For further fragments, base station directly can will obtain video
The request of further fragments pass to HAS server, this puts different from the process of first fragment.Need to refer to
Go out, further fragments refer to other fragments outside first fragment, including intermediate segment and last fragment.When
So, base station is with the difference of intermediate segment to the process of last fragment, also enters one to last fragment
Step performs step 414 and 415.
In step 414, HAS server sends the request of the last fragment obtaining video to base station, should
Ask and carry the 2nd QL.In step 415, the 2nd QL is recorded as suggestion QL by base station, and records and obtain
Obtain the reception time of the request of last fragment of video.In one example, this reception time can be used for base
Stand when receiving viewing video request next time, execution step 403 determine before and after between two sections of videos when
Between be spaced.
It may be noted that in the same period performed not the having between the step of particular association of same entity
Sequencing be not limited, such as step 402 and 403, and step 405,406 and 407.
In one example, step 407 can be first carried out, subsequent execution step 405, last execution step 406.
Flow process shown in Fig. 4 quality to transmission of video by access devices such as base station, WAPs
Be controlled, need not increase extra signaling, the process of whole quality control for HAS client and
HAS server is all transparent.
Embodiment two
Fig. 5 is the schematic flow sheet of video transmission method in one embodiment of the invention, is also to be entered by base station
The control of row transmission quality.
In step 501, HAS client sends viewing video request to base station.In step 502, base
Stand and this viewing video request is sent to HAS server process.In step 503, base station obtains currently
Time interval between request video and previous viewing video.In step 504, HAS server will be original
Inventory file is supplied to base station.In step 505, according to described time interval, base station judges that current request regards
Whether frequency and previous viewing video belong to continuous videos.In step 506, base station is according to source list file
Judge whether current request video is short-sighted frequency.In step 507, base station judges whether burst flow is low.
If the judged result of step 505-507 is being, in step 508, base station preserves source list
File, generates pseudo- inventory file, and the minimum data speed that suggestion QL is recorded as in pseudo- inventory file
Rate.In step 509, pseudo- inventory file is sent to HAS client by base station.HAS client will be from puppet
A QL is selected in set of data rates in inventory file.Correspondingly, in step 510, HAS visitor
When family end sends the request of first fragment obtaining video, the QL wherein carrying is at least and advises
QL.Assume that suggestion QL is 991kbps, then the set of data rates in pseudo- inventory file be 991,1427,
2056,2962 }.
In step 511, the request of the first fragment of this acquisition video is sent to HAS server via base station.
In step 512, HAS server issues the first fragment of video according to suggestion QL.In step 513,
Base station is processed to the first fragment of described video, increases inventory file update notification wherein.In step
Rapid 514, the first fragment carrying the described video of inventory file update notification is handed down to HAS by base station
Client.In step 515, the source list file preserving in step 508 is sent to HAS visitor by base station
Family end is so that HAS client recovers normal data rate selection in further fragments.In step 516,
HAS client sends the request of the last fragment obtaining video.The request of the last fragment of this acquisition video
In carry recorded by base station in step 517 for the 2nd QL that last fragment is selected.In step 517
In, base station also further have recorded obtain video the request of last fragment the reception time, under
When one video request arrives, calculate the time interval between current request video and next request video.
It may be noted that the flow process shown in Fig. 5 is all transparent for HAS client and HAS server.
Embodiment three
Fig. 6 is the schematic flow sheet of video transmission method in one embodiment of the invention, by HAS server
It is transmitted the control of quality.
In step 601, burst flow state is supplied to HAS server by base station.In one example,
This burst flow state can adopt Simple Network Management Protocol (SNMP, Simple Network
Management Protocol) or the transmission of other network service protocols.
The viewing video request sending in step 602 and 603, HAS client is passed to by base station
HAS server.In step 604, HAS server obtain current request video and previous viewing video it
Between time interval.In step 605, according to described time interval, HAS server judges that current request regards
Whether frequency and previous viewing video belong to continuous videos.In step 606, HAS server is according to original clear
Monofile judges whether current request video is short-sighted frequency.In step 607, HAS server is according to step
Whether the burst flow condition adjudgement burst flow of 601 acquisitions is low.
If the judged result of step 605-607 is being, in step 608, HAS server is according to elder generation
The data rate of front viewing video obtains suggestion QL.In step 609, HAS server generates pseudo- inventory
File is sent to base station, and by base station, pseudo- inventory file is sent to HAS client.In one example,
HAS server is that the minimum data rate in source list file is revised as suggestion QL, thus obtaining
Described puppet inventory file.In step 610, HAS client selects first fragment according to pseudo- inventory file
First QL, the request carrying the first fragment of the acquisition video of a QL is sent to base station, and by base
Station sends the request to HAS server.In step 611, HAS server carries out inventory file renewal,
Pseudo- inventory file is reverted to source list file.HAS server is in the first fragment of the video issuing
Carry inventory file update notification (step 612), and subsequently source list file is sent by base station
To HAS client (step 613).In step 614, HAS client is sent out according to source list file
Go out the request of further fragments.
It may be noted that the flow process shown in Fig. 6 is transparent for HAS client.
Example IV
Fig. 7 is the schematic flow sheet of video transmission method in one embodiment of the invention, is carried out by PGW
The control of transmission quality.
In step 701, burst flow state is supplied to PCRF by base station by RCAF.In step 702,
After network receives the viewing video request of HAS client initiation, PCRF judges that whether burst flow is
Low.If it is, PCRF sends the notice (step using the previous data rate watching video to PGW
Rapid 703).In step 704, PGW obtains the time between current request video and previous viewing video
Interval.In step 705, according to described time interval, PGW judges that current request video and previous viewing regard
Whether frequency belongs to continuous videos.In step 706, PGW judges whether current request video is short-sighted frequency.
If step 705 and 706 judged result are and are, in step 707, PGW sees according to previous
See that the data rate of video obtains GBR.In step 708, PGW sends carrying to base station and sets up request,
Carry this GBR information.In step 709, base station sends to HAS client and carries described GBR information
RRC connect reconfiguration request.It may be noted that this GBR information as advises QL.In step 710,
HAS client is replied RRC connection and is reconfigured response.In step 711, base station is replied to PGW and is carried
Set up response.In step 712, whether HAS client according to what source list file judged to be asked is
Short-sighted frequency.Specifically, HAS client obtains the process of source list file referring to step 401-405,
Here is omitted.If it is, in step 713, HAS client is selected according to described GBR information
Select a QL, and send first of the acquisition video carrying a described QL in step 714 to base station
The request of section.
In flow process shown in Fig. 7, in step 708, PGW can also be using a newly-increased signaling to base
Stand and finally to this GBR information of HAS client notification, rather than reuse existing loading establishing process
(such as using to carrying, foundation is asked and RRC connects reconfiguration request) carries out the notice of GBR.
Fig. 8 is the structural representation of access device 800 in one embodiment of the invention.This access device 800
Including：Information acquisition unit 801, joint video transmission adaptation unit 802, suggestion credit rating provide single
Unit 803.
In one example, information acquisition unit 801 please for the viewing video receiving videoconference client offer
Ask, obtain between the time previously watching between video and this current request video indicated by viewing video request
Every, and obtain the video length of described current request video from the source list file that video server provides.
Joint video transmission adaptation unit 802 is used for being judged according to described time interval and described video length
The no joint video that carries out transmits adaptation, and will determine that result is sent to suggestion credit rating and provides unit 803.
Suggestion credit rating provides unit 803 to be used for will be with described previous viewing video according to described judged result
The first fragment as described current request video for the suggestion credit rating of data rate association the first mass
Grade is supplied to described video server.Wherein it is proposed that credit rating with described previous viewing video data
Speed association shows as：Data rate according to the last fragment of previous viewing video arranges this suggestion quality etc.
Level；Or, the data rate of all fragments of previous viewing video is averaged or weighted sum, is somebody's turn to do
Suggestion credit rating.
In one example, joint video transmission adaptation unit 802 is further used for：According to burst flow shape
State judges whether to joint video transmission adaptation.
In one example it is proposed that credit rating provides unit 803 last according to described previous viewing video
Second credit rating of fragment arranges described suggestion credit rating.Receive obtaining of described videoconference client transmission
It is proposed that credit rating provides unit 803 that this acquisition video is first after obtaining the request of first fragment of video
Described first credit rating carrying in the request of fragment be revised as described suggestion credit rating be sent to described in regard
Frequency server.That is, by access device by the data rate of the first fragment of current request video and elder generation
The data rate of front viewing video associates so that the transmission quality of this first fragment with reference to previously watch
The transmission situation of video, it is achieved thereby that transmission of video combine adaptation.
Fig. 9 is the structural representation of access device in one embodiment of the invention, including：Acquisition of information list
Unit 801, joint video transmission adaptation unit 802, suggestion credit rating provide unit 803, and inventory
File updating block 904.Wherein, information acquisition unit 801, joint video transmission adaptation unit 802,
Suggestion credit rating provides the realization of unit 803 to refer to the description of Fig. 8.
In one example it is proposed that credit rating provides unit 803 last according to described previous viewing video
Second credit rating of fragment arranges described suggestion credit rating, and by described source list file record
Low data rate is revised as described suggestion credit rating and is supplied to described videoconference client.
Inventory file updating block 904, after receiving described first fragment, increases in described first fragment
Inventory file update notification is sent to described videoconference client, and by the described source list file pre-saving
It is sent to described videoconference client.
When implementing, the operation of mentioned access device in above-mentioned Fig. 8 and Fig. 9 refers to Fig. 4 and Tu
5, this access device can be base station, WAP, access gateway etc..
Figure 10 is the structural representation of the network equipment 1000 in one embodiment of the invention.This network equipment
1000 include：Information acquisition unit 1001, joint video transmission adaptation unit 1002, suggestion quality etc.
Level provides unit 1003.
In one example, information acquisition unit 1001 is used for receiving viewing video request, obtains and previously saw
See the time interval between video and this current request video indicated by viewing video request, and from raw
The video length of described current request video is obtained in the source list file becoming.
Joint video transmission adaptation unit 1002 is used for being judged according to described time interval and described video length
The no joint video that carries out transmits adaptation, and will determine that result is sent to suggestion credit rating and provides unit 1003.
Suggestion credit rating provide unit 1003 be used for described judged result be in the case of, according to described
Previously the data rate of viewing video determined suggestion credit rating, was supplied to access device.
In one example, joint video transmission adaptation unit 1002 is further used for according to burst flow state
Judge whether to joint video transmission adaptation.
In one example it is proposed that credit rating provides unit 1003 to be used for passing through described suggestion credit rating
Carrying is set up request and is sent to described access device.
Figure 11 is the structural representation of the network equipment in one embodiment of the invention, including：Acquisition of information list
Unit 1001, joint video transmission adaptation unit 1002, suggestion credit rating provide unit 1003, and
Inventory file updating block 1104.Wherein, information acquisition unit 1001, joint video transmission adaptation unit
1002nd, suggestion credit rating provides the realization of unit 1003 to refer to the description of Figure 10.
In one example it is proposed that credit rating provides unit 1003 to be used in described source list file
Minimum data rate is revised as described suggestion credit rating and obtains pseudo- inventory file, and described puppet inventory file is carried
Supply described access device.
Inventory file updating block 1104 is used for after the request receiving the first fragment obtaining video, in institute
State increase inventory file update notification in the request of first fragment obtain video and be sent to described access device,
Again described source list file is sent to described access device.
When implementing, in above-mentioned Figure 10 and Figure 11 the operation of the mentioned network equipment refer to Fig. 6 and
Fig. 7, this network equipment can be video server, or packet data gateway etc..
Figure 12 is the structural representation of access device in one embodiment of the invention, including：Processor 1201
With memorizer 1202.Wherein, memorizer 1202 includes：First information acquiring unit 1212, first
Closing transmission of video adaptation unit 1222, first suggestion credit rating provides unit 1232.It may be noted that depositing
Reservoir 1202 is used for storing above command unit 1212,1222,1232, so that processor 1201 executes
These command units, to realize the flow process shown in Fig. 4 and Fig. 5.Specifically, first information acquiring unit
1212 function is identical with the information acquisition unit 801 in Fig. 8, the first joint video transmission adaptation unit
1222 function is identical with the joint video transmission adaptation unit 802 in Fig. 8, the first suggestion credit rating
The function of unit 1232 and the suggestion credit rating in Fig. 8 is provided to provide unit 803 identical, herein no longer
Repeat.Specifically, described access device is used for connecting user terminal and the network equipment, can be base station,
The equipment such as WAP, access gateway.
Figure 13 is the structural representation of the network equipment in one embodiment of the invention, including：Processor 1301
With memorizer 1302.Wherein, memorizer 1302 includes：Second information acquisition unit 1312, second
Closing transmission of video adaptation unit 1322, second suggestion credit rating provides unit 1332.It may be noted that depositing
Reservoir 1302 is used for storing above command unit 1312,1322,1332, so that processor 1301 executes
These command units, to realize the flow process shown in Fig. 6 and Fig. 7.Specifically, the second information acquisition unit
1312 function is identical with the information acquisition unit 1001 in Figure 10, and the second joint video transmission adaptation is single
The function of unit 1322 is identical with the joint video transmission adaptation unit 1002 in Figure 10, the second suggestion quality
Grade provides the function of unit 1332 and the suggestion credit rating in Figure 10 to provide unit 1003 identical, this
Place repeats no more.Specifically, the described network equipment can be video server (such as OTT server etc.),
Or packet data gateway etc..
It may be noted that the embodiment of the present application provide video transmission method can the effectively utilizes network bandwidth,
Provide the user more preferable video data transmission quality.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement done etc., should be included in
Within the scope of protection of the invention.
Claims (20)
1. a kind of video transmission method is it is characterised in that include：
After viewing video request generates, obtain regarding of this current request video specified by viewing video request
Frequency length, and obtain the time interval of previous viewing video and described current request video；
Judging to execute joint for described current request video according to described video length and described time interval
During transmission of video adaptation, described current request video is arranged according to the data rate of described previous viewing video
First credit rating of first fragment, and this first fragment is transmitted according to this first credit rating.
2. method according to claim 1 it is characterised in that described according to described video length with institute
State time interval and judge that carrying out joint video transmission adaptation for described current request video includes：
Described video length is compared with the length threshold pre-setting, judges that this current request video is
No for short-sighted frequency；
Described time interval is compared with pre-set interval thresholding, judges that this current request video is
No and described previous viewing video is continuous videos；
When the described current request video of determination is short-sighted frequency, and described current request video and described previous viewing
When video is continuous videos, it is defined as described current request video and carries out joint video transmission adaptation.
3. method according to claim 1 is it is characterised in that further include：
Whether the burst flow according to burst flow condition adjudgement network is low, when described burst flow is low
Carry out joint video transmission adaptation for described current request video.
4. method according to claim 3 it is characterised in that described according to described previous viewing video
Data rate first credit rating of first fragment of described current request video be set include：
After video server receives described viewing video request, source list file is supplied to access device；
Wherein, described source list file record has the video length of described current request video, and video consumer
Hold optional set of data rates；
Described access device is in the request of the first fragment receiving the acquisition video that this videoconference client sends
Afterwards, described first credit rating carrying in the request of the described first fragment obtaining video is revised as in advance
The suggestion credit rating preserving, then the request of the described first fragment obtaining video is sent to described video clothes
Business device；Wherein, described suggestion credit rating is configured according to the data rate of described previous viewing video.
5. method according to claim 4 is it is characterised in that further include：
Described access device receives the request of the last fragment of acquisition video that described videoconference client sends
Afterwards, the second credit rating carrying in the request according to the last fragment of this acquisition video arranges described suggestion matter
Amount grade, and record the reception time of the described request of last fragment obtaining video.
6. method according to claim 3 it is characterised in that described according to described previous viewing video
Data rate first credit rating of first fragment of described current request video be set include：
After video server receives described viewing video request, source list file is supplied to access device；
Wherein, described source list file record has the video length of described current request video, and video consumer
Hold optional set of data rates；
Described access device, when it is low for judging described burst flow, preserves described source list file, and
Minimum data rate in this source list file is revised as suggestion credit rating and obtains pseudo- inventory file, will
Described puppet inventory file is supplied to described videoconference client；Wherein, described suggestion credit rating is according to described elder generation
The data rate of front viewing video is configured；
Described videoconference client selects described first credit rating according to described puppet inventory file, and initiates to carry
The request of the first fragment of acquisition video of described first credit rating.
7. method according to claim 6 is it is characterised in that further include：
After described video server receives the request of first fragment of described acquisition video, set to described access
The standby first fragment issuing video；
Described access device increases inventory file update notification in the first fragment of the described video receiving；
The first fragment carrying the described video of this inventory file update notification is sent to by described access device
After described videoconference client, the described source list file that itself is preserved is sent to described videoconference client,
Make described videoconference client according to the further fragments of described source list file request video；
Described access device receives the request of the last fragment of acquisition video that described videoconference client sends
Afterwards, the second credit rating carrying in the request according to the last fragment of this acquisition video arranges described suggestion matter
Amount grade, and record the reception time of the described request of last fragment obtaining video.
8. method according to claim 3 it is characterised in that described according to described previous viewing video
Data rate first credit rating of first fragment of described current request video be set include：
The burst flow state that itself is detected by access device is sent to video server；
Described video server according to described burst flow condition adjudgement go out network burst flow be low when, root
Data rate according to described previous viewing video obtains suggestion credit rating, generates and sets this suggestion credit rating
The pseudo- inventory file being set to minimum data rate is supplied to described access device；
This pseudo- inventory file is sent to described access device videoconference client so that described videoconference client root
Ask the first fragment of video according to described puppet inventory file.
9. method according to claim 8 is it is characterised in that further include：
Described video server receive obtain video first fragment request after, by first of video
Section is supplied to described access device, carries inventory file update notification in the first fragment of described video；
Described video server, after the first fragment of described video sends, sends original to described access device
Inventory file；
Described access device sends described source list file to described videoconference client so that described video is objective
Family end is according to the further fragments of described source list file request video.
10. method according to claim 3 is it is characterised in that described regard according to described previous viewing
The first credit rating that the data rate of frequency arranges the first fragment of described current request video includes：
Burst flow state is sent to plan by Wireless network congestion perceptive function unit R CAF by access device
Slightly with charging rule functions unit PCRF；
Described PCRF according to described burst flow condition adjudgement go out network burst flow be low when, instruction point
Group data gateway PGW ensures bit rate GBR according to the data rate setting of described previous viewing video；
Described PGW, according to the data rate setting GBR of this previous viewing video, this GBR is passed through to carry
Set up request and be supplied to access device；
Described access device connects reconfiguration instructions by RRC and described GBR is sent to videoconference client；
According to source list file, described videoconference client judges whether described current request video is short-sighted frequency,
If it is the first credit rating is arranged according to this GBR, send to described access device and carry described first matter
The request of the first fragment of acquisition video of amount grade.
A kind of 11. access devices are it is characterised in that include：
Information acquisition unit, for receiving the viewing video request of videoconference client offer, obtains and previously watched
Time interval between video and this current request video indicated by viewing video request, and from Video service
The video length of described current request video is obtained in the source list file that device provides；
Joint video transmits adaptation unit, for being judged whether according to described time interval and described video length
Carry out joint video transmission adaptation, and will determine that result is sent to suggestion credit rating and provides unit；
Described suggestion credit rating provides unit, for regarding with described previous viewing according to described judged result
First matter of the first fragment as described current request video for the suggestion credit rating of the data rate association of frequency
Amount grade is supplied to described video server.
12. access devices according to claim 11 are it is characterised in that the transmission of described joint video is suitable
Join unit to be further used for：Whether joint video transmission adaptation is carried out according to burst flow condition adjudgement.
13. access devices according to claim 12 are it is characterised in that described suggestion credit rating carries
It is used for for unit：
Second credit rating setting described suggestion quality of last fragment according to described previous viewing video etc.
Level；
After receiving the request of first fragment of acquisition video that described videoconference client sends, this acquisition is regarded
Described first credit rating carrying in the request of first fragment of frequency is revised as described suggestion credit rating and sends
To described video server.
14. access devices according to claim 12 are it is characterised in that described suggestion credit rating carries
It is used for for unit：
Second credit rating setting described suggestion quality of last fragment according to described previous viewing video etc.
Level；
The minimum data rate of described source list file record is revised as described suggestion credit rating be supplied to
Described videoconference client；
Described access device further includes：Inventory file updating block, for receiving described first
Duan Hou, increases inventory file update notification in described first fragment and is sent to described videoconference client, and will
The described source list file pre-saving is sent to described videoconference client.
15. access devices according to claim 11 it is characterised in that described access device be base station,
Or WAP, or access gateway.
A kind of 16. network equipments are it is characterised in that include：
Information acquisition unit, for receiving viewing video request, obtains and previously watches video and this viewing video
Time interval between the indicated current request video of request, and obtain from the source list file of generation
Take the video length of described current request video；
Joint video transmits adaptation unit, for being judged whether according to described time interval and described video length
Carry out joint video transmission adaptation, and will determine that result is sent to suggestion credit rating and provides unit；
Described suggestion credit rating provides unit, in the case of being to be in described judged result, according to institute
The data rate stating previous viewing video obtains suggestion credit rating, is supplied to access device.
17. network equipments according to claim 16 are it is characterised in that the transmission of described joint video is suitable
Join unit to be further used for：Whether joint video transmission adaptation is carried out according to burst flow condition adjudgement.
18. network equipments according to claim 17 are it is characterised in that described suggestion credit rating carries
It is used for for unit：Described suggestion credit rating is set up request by carrying and is sent to described access device.
19. network equipments according to claim 17 are it is characterised in that described suggestion credit rating carries
It is used for for unit：Minimum data rate in described source list file is revised as described suggestion credit rating
Obtain pseudo- inventory file, described puppet inventory file is supplied to described access device；
The described network equipment further includes：Inventory file updating block, for receiving acquisition video
After the request of first fragment, the request of the described first fragment obtaining video increases inventory file renewal logical
Know and be sent to described access device, more described source list file is sent to described access device.
20. network equipments according to claim 16 are it is characterised in that the described network equipment is video
Server, or packet data gateway.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510437063.8A CN106412701A (en) | 2015-07-23 | 2015-07-23 | Video transmission method, access device and network device |
| JP2016143451A JP2017028700A (en) | 2015-07-23 | 2016-07-21 | Moving image distribution method, access device, and network device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510437063.8A CN106412701A (en) | 2015-07-23 | 2015-07-23 | Video transmission method, access device and network device |
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| CN106412701A true CN106412701A (en) | 2017-02-15 |
Family
ID=57946224
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510437063.8A Pending CN106412701A (en) | 2015-07-23 | 2015-07-23 | Video transmission method, access device and network device |
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| JP (1) | JP2017028700A (en) |
| CN (1) | CN106412701A (en) |
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| US11882340B2 (en) * | 2019-07-10 | 2024-01-23 | Nippon Telegraph And Telephone Corporation | Content distribution system, unicast multicast converter, content distribution method and content distribution program |
| JP7363920B2 (en) * | 2019-11-26 | 2023-10-18 | 日本電信電話株式会社 | System control device and prototype manifest file acquisition method |
| CN114379563B (en) * | 2020-10-21 | 2023-08-08 | 广州汽车集团股份有限公司 | Safe driving control method, system and storage medium thereof |
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