CN104796735B - A kind of method of transmitting video data and device - Google Patents
A kind of method of transmitting video data and device Download PDFInfo
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- CN104796735B CN104796735B CN201410023809.6A CN201410023809A CN104796735B CN 104796735 B CN104796735 B CN 104796735B CN 201410023809 A CN201410023809 A CN 201410023809A CN 104796735 B CN104796735 B CN 104796735B
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Abstract
An embodiment of the present invention provides a kind of method of transmitting video data and device, this method realizes that this method includes by video information process device：Obtain the standard video stream generated after message sink coding that the video server in core net is sent, then channel coding is carried out to the standard video stream received, generation includes the video flowing of redundancy, video flowing comprising redundancy is sent to purpose terminal by accessing network, in this way video flowing transmit in the core network during there is no redundancies, so as to reduce the load pressure of core net, the resource utilization of core net is improved.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of method of transmitting video data and device.
Background technology
With the booming demand of video traffic, this also proposes core net higher requirement.Video data at present
Massive band width is occupied, through extremely sensitive to mistake error code after overcompression, will cause to regard when occurring error code in transmission network
Frequency stream can not decode, so that video communication is interrupted.In order to resist the interference of error code problem in transmission network, currently to information source
It carries out in basis of coding, further channels of video data is encoded, add in redundancy letter in video data in the process
Breath, to resist the influence of network error code, packet loss to video data transmission.The size of this redundancy, with bit error rate size phase
It closes, to resist the packet loss of 5%-10%, can generally increase the redundancy of highest 20%.
Current video transmission technologies are all to reduce error code using directly redundancy is added at core net end, although
Redundancy is directly added by core net and has simplified video processing links, but the load pressure of core net can be caused larger, and
And waste the Internet resources of core net.
Invention content
An embodiment of the present invention provides a kind of method of transmitting video data and device, to solve core net in the prior art
The problem of load pressure is larger and resources of core network wastes.
Its specific technical solution is as follows：
A kind of method of transmitting video data, including：
Receive the video flowing for only passing through message sink coding that the video server in core net is sent；
Channel coding is carried out to the video flowing received, generation includes the video flowing of redundancy；
Video flowing comprising redundancy is sent to purpose terminal by accessing net.
Optionally, the video flowing received is subjected to channel coding, generation includes the video flowing of redundancy, packet
It includes：
According to the network congestion condition information that terminal is fed back, the current network packet loss of access net is determined,
According to the correspondence between network packet loss rate and redundancy ratio, determine that the current network packet loss is corresponding
Redundancy ratio, wherein, the redundancy ratio is ratio shared in video flowing of the redundancy after channel coding；
Based on the redundancy ratio, channel coding is carried out to the video flowing that video server is sent, generation includes corresponding institute
State the video flowing of the redundancy of redundancy ratio.
Optionally, channel coding is carried out to the video flowing received, generation includes the video flowing of redundancy, packet
It includes：
The video flowing size sent according to video server determines to carry out the video flowing coding mode of channel coding；
Channel coding carries out the video flowing according to determining coding mode, generation includes redundancy and coding staff
The video flowing of formula information.
Optionally, it after the video flowing for including redundancy is sent to purpose terminal by accessing net, further includes：
By access net receive terminal send by message sink coding and the video flowing of channel coding when, regarded to described
Frequency stream carries out channel decoding, and obtains the video flowing of removal redundancy；
By the video server in the video stream to core net of the removal redundancy of acquisition.
Optionally, channel coding is carried out to the video flowing received, generation includes the video flowing of redundancy, specifically
For：
Forward error correction coding FEC is carried out to the video flowing that the video server is sent, generation includes redundancy video
Stream.
A kind of video data transmission device, including：
Receiving module, the video for only passing through message sink coding that the video server for receiving in core net is sent
Stream；
Processing module, for carrying out channel coding to the video flowing received, generation includes the video of redundancy
Stream；
Sending module, for the video flowing for including redundancy to be sent to purpose terminal by accessing net.
Optionally, the processing module, including：
Acquiring unit for the network congestion condition information uploaded according to terminal, obtains the current network packet loss of access net
Rate；
Determination unit, for according to the correspondence between network packet loss rate and redundancy ratio, determining that current network is lost
The corresponding redundancy ratio of packet rate, wherein the redundancy ratio example is ratio shared in video flowing of the redundancy after channel coding
Example；
For being based on the redundancy ratio, channel coding is carried out to the video flowing that video server is sent for coding unit, raw
Into the video flowing of the redundancy comprising the correspondence redundancy ratio.
Optionally, the processing module, including：
Determination unit is encoded, the video flowing size for being sent according to video server determines to carry out letter to the video flowing
The coding mode of road coding；
Processing unit, for carrying out channel coding to the video flowing that video server is sent according to determining coding mode,
Video flowing of the generation comprising redundancy and coding mode information.
Optionally, the receiving module, be additionally operable to by accessing that net receives that terminal sends by message sink coding and
During the video flowing of channel coding, channel decoding is carried out to the video flowing, and obtain the video flowing of removal redundancy；
The sending module is additionally operable to take the video in the video stream to core net of the removal redundancy of acquisition
Business device.
Optionally, the processing module carries out forward error correction specifically for the video flowing sent to the video server
FEC is encoded, generation includes redundancy video flowing.
An embodiment of the present invention provides a kind of method of transmitting video data, and this method is by video information process device come real
Existing, this method includes：The standard video stream generated after message sink coding that the video server in core net is sent is obtained, so
Channel coding is carried out to the standard video stream received afterwards, generation includes the video flowing of redundancy, will include redundancy
Video flowing is sent to purpose terminal by accessing network, and there is no redundancies during such video flowing transmits in the core network
Information so as to reduce the load pressure of core net, improves the resource utilization of core net.
Description of the drawings
Fig. 1 is a kind of flow chart of method of transmitting video data in the embodiment of the present invention；
Fig. 2 is video data transmission process schematic during video interactive in the embodiment of the present invention；
Fig. 3 is the structure diagram of another video data transmission device in the embodiment of the present invention.
Specific embodiment
At present, the video flowing in video server is all to be transferred to terminal by core net and access net, generally carrys out core
It transmits and stablizes in heart net, and without packet loss, and access net transmission is unstable, network condition is complicated, so being passed in video flowing
It needs to carry out message sink coding and channel coding to video flowing before defeated, will add in video streaming so a certain proportion of superfluous
Remaining information, although in this way so that the link of video flow processing is reduced, after increasing redundancy in video streaming, meeting is direct
Increase the load pressure of core net, while also result in the wasting of resources of core net.
In embodiments of the present invention in order to solve in the prior art in the core network to video data add redundancy and
The problem of causing core network load pressure larger, and resources of core network is caused to waste, an embodiment of the present invention provides one kind to regard
Frequency data transmission method, this method realize that this method includes by video relay：Receive the video in core net
The video flowing for only passing through message sink coding that server is sent, then carries out channel coding, generation is included to the video flowing received
Video flowing comprising redundancy is sent to purpose terminal, such video flowing by the video flowing of redundancy by accessing network
There is no redundancies during transmitting in the core network, so as to reduce the load pressure of core net, improve core
The resource utilization of net.
Technical solution of the present invention is described in detail below by attached drawing and specific embodiment, it should be understood that this hair
Particular technique feature in bright embodiment and embodiment is explanation rather than the restriction to technical solution of the present invention.
Embodiment one：
It is as shown in Figure 1 a kind of flow chart of method of transmitting video data in the embodiment of the present invention, this method includes：
S101 receives the video flowing for only passing through message sink coding that the video server in core net is sent；
For first, executive agent in embodiments of the present invention is video relay, which disposes
Position between being netted with core net and access, i.e.,：One termination core net of video relay, another termination access net.
The data information of core network to access net is required for by video relay, in embodiments of the present invention when
When video relay receives the data information that the video server in core net is sent, which can parse this
Data information judges to whether there is video parameter in the data information, i.e.,：With the presence or absence of video format, frame per second, resolution ratio etc. with
The relevant parameter of video flowing, if there is no video parameters, then video relay is using the data information as common data
Information processing, i.e.,：As general instruction either other interaction datas, which will not be to these common numbers
According to any processing is done, purpose terminal is directly sent it to；
If there are during video data in data information, then video relay is using the data information as to be transmitted
Video flowing.
Certainly, in embodiments of the present invention, the video flowing that the video server in core net is sent is only to be compiled by information source
The video flowing of code, and there is no pass through channel coding, that is to say, that there is no redundancies in the video flowing transmitted in the core network
Information, the occupied Internet resources of video flowing transmitted in such core net will be significantly reduced, so as to save in core net
Internet resources, improve the network resource utilization of core net.
S102 carries out channel coding to the video flowing received, and generation includes the video flowing of redundancy；
After the video flowing that the video server in core net is sent is determined in S101, then video relay needs
The video flowing is transmitted to purpose terminal by accessing net, but since the stability of access net is poor, video relaying dress
Putting needs to carry out channel coding to the video flowing that video server is sent, which can be forward error correction coding（English：
Forward Error Correction are referred to as：FEC）, which can be realized by the following two kinds mode：
Mode one：
FEC codings are directly carried out to the standard video stream received, say by codings such as Hamming code, RS codes, BCH codes
Mode encodes standard video stream to add redundancy, so as to obtain the video flowing that FEC codings generate later, is regarded at this
Frequency contains redundancy in flowing, and such channel coding process is simple, and processing speed is very fast
Which kind of certainly, can be determined herein with reference to the size for the video flowing that video server is sent through mode come to this
Video flowing carries out channel coding, such as when video flowing is larger can select a kind of channel coding method, and when video flowing is smaller
Another channel coding method can be selected, can flexibly carry out different channel coding methods in this way, so as to ensure channel
On the basis of encoding convenient degree, the reliability of channel coding is improved.
Mode two：
Before the standard video stream to receiving carries out FEC codings, network that video relay is uploaded according to terminal
Jam state information or the network condition that present Access is determined by network detecting, i.e.,：The network packet loss rate of net is accessed,
The network packet loss rate for being then based on access net determines a suitable redundancy ratio, which is redundancy in video
Shared ratio in stream.
Redundancy ratio is then based on, channel coding is carried out to the video flowing that video server is sent, generation is superfluous comprising correspondence
The video flowing of the redundancy of remaining ratio.
Such as：Redundancy ratio in the case of heterogeneous networks are saved in device in video, as shown in table 1：
| Packet loss | Redundancy ratio |
| 5%-10% | 15% |
| 11%-20% | 20% |
| 21%-30% | 25% |
Table 1
By the correspondence in table 1, video relay just can on the basis of the network request for determining access net
It determines corresponding redundancy ratio, how many redundancy letters is added so that it is determined that going out in the video flowing that can be sent in video server
Breath, redundancy can reasonably be added in this way by also ensuring that in channel coding process, and the redundancy for causing to have to is avoided to believe
Breath is added in video flowing.
In video after the video flowing that device sends video server carries out channel coding, video relay is also
Coding mode information will be added in redundancy, that is to say, that the mode of channel coding can be added in redundancy, i.e.,：
Channel coding explanation is added in a certain field of redundancy, so that terminal can illustrate to carry out standard according to the channel coding
Really quickly decoding.
After channel coding is carried out to video flowing, step 103 is performed.
Video flowing comprising redundancy is sent to purpose terminal by S103 by accessing net.
Video relay is after the channel coding of video flowing for completing to send video server, after channel coding
Video stream to purpose terminal, purpose terminal will read channel coding method information from the redundancy of video flowing, this
Sample purpose terminal is known that the coding mode of channel coding, therefore purpose terminal can carry out quick channel solution to video flowing
Code.And then purpose terminal can be quickly obtained the video flowing of removal redundancy.
By above-mentioned method, channel is carried out to standard video stream by video relay in embodiments of the present invention
Coding, such video flowing in core network there is no need into channel coding, i.e.,：It will not there are redundancy letters in video flowing
Breath, so as to reduce the load pressure of core net, also saves the Internet resources of core net, improves the Internet resources of core net
Utilization rate.
Further, if the process that video relay receives terminal and send by accessing net in embodiments of the present invention
During the video information of message sink coding and channel coding, which will carry out channel decoding, and obtain to video information
It wins the confidence decoded video flowing；
Specifically, since terminal is needed by accessing net by video stream to video server, terminal can be right
The video flowing progress message sink coding and channel coding, certain terminal for needing upload server can losing according to present Access
Packet rate determines a suitable redundancy ratio, can enable the terminal to add appropriate redundancy letter in video streaming in this way
Breath so as to ensure that video flowing is complete, reduces the load pressure of access net to the greatest extent.
In addition, it also added channel coding explanation in the redundancy of video flowing, that is to say, that used by bright terminal
Channel coding method, such video relay can illustrate quickly and accurately to be decoded according to the channel coding.
After the decoded video flowing of channel is obtained, video relay is that the video for eliminating redundancy circulates
It crosses core net and is sent to video server, the video flowing transmitted in core net would not include redundancy, so as to reduce core
The load pressure of heart net has saved the Internet resources of core net, improves the network resource utilization of core net.
During the transmission method of video data in above-described embodiment can be applied to video on demand, such as video
When relay receives the video on-demand request of terminal transmission, which can be forwarded to and regard by video relay
Frequency server, so as to which video server will return to corresponding video flowing, certain video flowing according to video on-demand request to terminal
Transmission process in core net and access net can be carried out according to the process in above-described embodiment, except of course that video on demand
Application scenarios can also be that video server actively to the scene of terminal pushing video file, just no longer enumerates this herein
The specific application scenarios of method in inventive embodiments.
It, can be in addition, the method in above-described embodiment is other than in the application scenarios that can be applied to video on demand
It is applied in the application scenarios of video interactive, the function of video relay is done in detail below by specific interactive application scene
Thin explanation, is illustrated in figure 2 video interactive flow diagram during video interactive, and concrete implementation process is as follows：
1st, terminal A will need the video flowing for being transmitted to terminal B to carry out message sink coding and channel coding, and will be after coding
Video stream is to video relay A；
2nd, video relay A is after the video flowing for receiving terminal A transmissions, and video relay A is to the video flowing
Channel decoding is carried out, i.e.,：The redundancy in video flowing is removed, then obtains standard video stream, and standard video stream is sent
To video relay B；
3rd, video relay B is to after the standard video stream that receives, the packet loss that net is accessed according to residing for terminal B determines
Then redundancy ratio adds redundancy into standard video stream according to redundancy ratio, so as to obtain the video after channel coding
Stream.Final video relay B will be sent to terminal B by the video after channel coding.
Last terminal B will carry out channel decoding and source coding, the video flowing so as to be played.
Certainly, the process of terminal B to terminal A transmission video flowings is identical with the process of above-mentioned 1-3, just no longer superfluous herein
It states.
There is no redundancy in above-mentioned steps 1-3 can be seen that the video flowing transmitted in the core network, thus
The load pressure in core net is greatly reduced, has saved the Internet resources of core net, improves the Internet resources of core net
Utilization rate.
Embodiment two：
The video information process device in the embodiment of the present invention one is corresponded to, a kind of video is additionally provided in the embodiment of the present invention
Information processing unit is illustrated in figure 3 a kind of structure diagram of video data transmission device, the device in the embodiment of the present invention
Including：
Receiving module 301, only the regarding by message sink coding that the video server for receiving in core net is sent
Frequency flows；
Processing module 302, for carrying out channel coding, generation regarding comprising redundancy to the video flowing received
Frequency flows；
Sending module 303, for the video flowing for including redundancy to be sent to purpose terminal by accessing net.Into one
Step, processing module 302 in embodiments of the present invention include：
Acquiring unit for the network congestion condition information uploaded according to terminal, obtains the current network packet loss of access net
Rate；
Determination unit, for according to the correspondence between network packet loss rate and redundancy ratio, determining that current network is lost
The corresponding redundancy ratio of packet rate, wherein redundancy ratio are ratio shared in video flowing of the redundancy after channel coding；
Coding unit for being based on redundancy ratio, carries out the video flowing that video server is sent channel coding, generation packet
The video flowing of redundancy containing corresponding redundancy ratio.
Further, the processing module 302 includes in embodiments of the present invention：
Determination unit is encoded, the video flowing size for being sent according to video server determines to carry out letter to the video flowing
The coding mode of road coding；
Processing unit, for carrying out channel coding to the video flowing that video server is sent according to determining coding mode,
Video flowing of the generation comprising redundancy and coding mode information.
Further, receiving module 301 in embodiments of the present invention is additionally operable to receive what terminal was sent by accessing net
During by message sink coding and the video flowing of channel coding, channel decoding is carried out to the video flowing, and obtains removal redundancy letter
The video flowing of breath；
Sending module 303 is additionally operable to take the video in the video stream to core net of the removal redundancy of acquisition
Business device.
Further, it in processing module of the embodiment of the present invention 302, is carried out specifically for the video flowing sent to video server
Forward error correction coding FEC, generation include redundancy video flowing.
The present invention be with reference to according to the method for the embodiment of the present invention, equipment（System）And the flow of computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device of function specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then additional changes and modifications may be made to these embodiments.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (6)
1. a kind of method of transmitting video data, which is characterized in that including：
Video relay receives the data information that video server is sent in core net；
It determines in the data information there are during video parameter, using the data information as video flowing to be transmitted；Wherein, depending on
Frequency parameter includes at least video format, frame per second, resolution ratio, and video flowing of the video flowing to be transmitted only to pass through message sink coding；
Channel coding is carried out to the video flowing, generation includes the video flowing of redundancy；
Video flowing comprising redundancy is sent to purpose terminal by accessing net；
Wherein, channel coding is carried out to the video flowing, generation includes the video flowing of redundancy, including：
According to the network congestion condition information that terminal is fed back, the current network packet loss of access net is determined；According to network packet loss rate
With the correspondence between redundancy ratio, the corresponding redundancy ratio of the current network packet loss, the redundancy ratio are determined
Shared ratio in the video flowing for being redundancy after channel coding；Based on the redundancy ratio, video server is sent
Video flowing carry out channel coding, the video flowing of redundancy of the generation comprising the corresponding redundancy ratio；Alternatively,
The video flowing size sent according to video server determines to carry out the video flowing coding mode of channel coding；According to
Determining coding mode carries out the video flowing channel coding, video of the generation comprising redundancy and coding mode information
Stream.
2. the method as described in claim 1, which is characterized in that sent in the video flowing that will include redundancy by accessing net
To purpose terminal, further include：
By access net receive terminal send by message sink coding and the video flowing of channel coding when, to the video flowing
Channel decoding is carried out, and obtains the video flowing of removal redundancy；
By the video server in the video stream to core net of the removal redundancy of acquisition.
3. the method as described in claim 1, which is characterized in that channel coding, generation are carried out to the video flowing received
Video flowing comprising redundancy, specially：
Forward error correction coding FEC is carried out to the video flowing that the video server is sent, generation includes redundancy video flowing.
4. a kind of video data transmission device, which is characterized in that including：
Receiving module, for receiving the data information that video server is sent in core net；Determine exist in the data information
During video parameter, using the data information as video flowing to be transmitted；Wherein, video parameter includes at least video format, frame
Rate, resolution ratio, and video flowing of the video flowing to be transmitted only to pass through message sink coding；
Processing module, for carrying out channel coding to the video flowing, generation includes the video flowing of redundancy；
Sending module, for the video flowing for including redundancy to be sent to purpose terminal by accessing net；
Wherein, processing module is specifically used for：
According to the network congestion condition information that terminal uploads, the current network packet loss of access net is obtained；According to network packet loss rate
With the correspondence between redundancy ratio, the corresponding redundancy ratio of current network packet loss is determined, the redundancy ratio is superfluous
Shared ratio in video flowing of the remaining information after channel coding；Based on the redundancy ratio, video server transmission is regarded
Frequency stream carries out channel coding, the video flowing of redundancy of the generation comprising the corresponding redundancy ratio；Alternatively,
The video flowing size sent according to video server determines to carry out the video flowing coding mode of channel coding；According to
Determining coding mode carries out channel coding to the video flowing that video server is sent, and generation includes redundancy and coding staff
The video flowing of formula information.
5. device as claimed in claim 4, which is characterized in that the receiving module is additionally operable to receive end by accessing net
End send by message sink coding and the video flowing of channel coding when, to the video flowing carry out channel decoding, and obtain go
Except the video flowing of redundancy；
The sending module is additionally operable to the Video service in the video stream to core net of the removal redundancy of acquisition
Device.
6. device as claimed in claim 4, which is characterized in that the processing module, specifically for the video server
The video flowing of transmission carries out forward error correction coding FEC, and generation includes redundancy video flowing.
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| CN108810535B (en) * | 2018-06-12 | 2020-11-03 | 南京邮电大学 | Adaptive robust video coding method based on millimeter wave system |
| CN111314335B (en) * | 2020-02-10 | 2021-10-08 | 腾讯科技（深圳）有限公司 | Data transmission method, device, terminal, storage medium and system |
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| CN101616139A (en) * | 2008-06-24 | 2009-12-30 | 华为技术有限公司 | The method of transmitting multimedia service in the next generation network, system, and device |
| CN103262630A (en) * | 2010-12-20 | 2013-08-21 | 英特尔公司 | Signaling techniques for multimedia-ware radio and network adaptation |
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| JP2002050996A (en) * | 2000-07-31 | 2002-02-15 | Sony Corp | Communication system transmitting signals coded using block lengths comprising with integral multiple interrelation via communication transmission path |
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| CN101193060A (en) * | 2006-12-01 | 2008-06-04 | 武汉烽火网络有限责任公司 | Method for reliable E1 transmission based on forward error correction mechanism in packet network |
| CN101616139A (en) * | 2008-06-24 | 2009-12-30 | 华为技术有限公司 | The method of transmitting multimedia service in the next generation network, system, and device |
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