CN103763216A - System and method for adjusting data transmission - Google Patents
System and method for adjusting data transmission Download PDFInfo
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- CN103763216A CN103763216A CN201410036349.0A CN201410036349A CN103763216A CN 103763216 A CN103763216 A CN 103763216A CN 201410036349 A CN201410036349 A CN 201410036349A CN 103763216 A CN103763216 A CN 103763216A
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Abstract
The invention is suitable for the technical field of network communication, and provides a system and method for adjusting data transmission. The system comprises a terminal and a server. The terminal comprises a data transmitting unit, an average packet loss probability obtaining unit, an adjustment level obtaining unit and a coding parameter setting unit. The server comprises a data receiving unit and a packet loss probability feedback unit. According to the system and method, coding parameters are continuously adjusted through the packet loss probability fed back by the server in the data transmission process so that code rate transmission data of a current network signal can be adapted, and video monitoring is stable.
Description
Technical field
The invention belongs to network communications technology field, relate in particular to a kind of adjustment System and method of transfer of data.
Background technology
The development of the 3G communication technology, makes people can carry out in different location real time communication, as 3G is applied on vehicle-mounted real-time video monitoring, makes the people of Surveillance center can pass through the real-time monitoring vehicle state of Audio and Video.In Vehicular video monitoring system, media flow transmission adopts RTP (Real-time Transport Protocol, RTP), but because IP network can not provide reliable transmission mechanism, flow control or congestion control are not provided, in the process of Vehicle Driving Cycle, can there is continuous variation in 3G signal, cause network state unstable, when 3G dtr signal, network bandwidth reduction causes the audio, video data of video monitoring to lose on network, the choppy voice that causes Surveillance center to hear, the video image of seeing has mosaic, when 3G signal strengthens, the network bandwidth improves, met the required transmission bandwidth of audio/video flow, Surveillance center can clearly hear again sound and see image.
Therefore, available data transmission method exists when network signal variation, and system still, with the code check transmission under proper network signal, occurs that the problem of mosaic appears in choppy voice, image.Foregoing only, for auxiliary understanding technical scheme of the present invention, does not represent and admits that foregoing is prior art.
Summary of the invention
The embodiment of the present invention provides a kind of adjustment System and method of transfer of data, being intended to solve available data transmission method exists when network signal variation, system is still with the code check transmission under proper network signal, monitor video is unstable, occurs that the problem of mosaic appears in choppy voice, image.
On the one hand, provide a kind of adjustment System of transfer of data, described system comprises terminal and server, and described terminal comprises:
Data transmission unit, if the monitoring request sending for receiving server, by wireless network, the coded data in encoder buffer district is sent to server, described coded data is that encoder carries out coded data with the coding parameter corresponding with present encoding rank;
Average packet loss ratio acquiring unit, for according to the packet loss of the described coded data that described server returns in Preset Time, obtains average packet loss ratio;
Adjust rank acquiring unit, for according to described present encoding rank and default code adjustment rank corresponding to described average packet loss ratio, obtain adjustment rank;
Coding parameter setting unit, for described adjustment rank, be set to the present encoding rank of described encoder so that described encoder according to arrange after coding parameter corresponding to present encoding rank encode and be sent to the coded data of described server in next Preset Time;
Described server comprises:
Data receiver unit, the coded data sending for receiving described terminal;
Packet loss feedback unit, for according to the quantity of described coded data receiving and the quantity of the described coded data of transmission, calculates packet loss and is sent to described terminal.
On the other hand, provide a kind of method of adjustment of transfer of data, described method comprises:
If receive the monitoring request that server sends, by wireless network, the coded data in encoder buffer district is sent to server, described coded data is that encoder carries out coded data with the coding parameter corresponding with present encoding rank;
According to the packet loss of the described coded data that described server returns in Preset Time, obtain average packet loss ratio;
According to described present encoding rank and default code adjustment rank corresponding to described average packet loss ratio, obtain adjustment rank;
Described adjustment rank is set to the present encoding rank of described encoder so that described encoder according to arrange after coding parameter corresponding to present encoding rank encode and be sent to the coded data of described server in next Preset Time.
In the embodiment of the present invention, if receive the monitoring request that server sends, by wireless network, the coded data in encoder buffer district is sent to server, described coded data is that encoder carries out coded data with the coding parameter corresponding with present encoding rank; According to the packet loss of the described coded data that described server returns in Preset Time, obtain average packet loss ratio; According to described present encoding rank and default code adjustment rank corresponding to described average packet loss ratio, obtain adjustment rank; Described adjustment rank is set to the present encoding rank of described encoder, so that described encoder according to arrange after coding parameter corresponding to present encoding rank encode and be sent to the coded data of described server in next Preset Time, the present invention, in data transmission procedure, constantly the packet loss by server feedback is adjusted coding parameter to adapt to the code check transmission data of current network signal, makes video monitoring more stable.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the adjustment System of the transfer of data that provides of the embodiment of the present invention one;
Fig. 2 is the realization flow figure of the method for adjustment of the transfer of data that provides of the embodiment of the present invention two.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with specific embodiment, realization of the present invention is described in detail:
Embodiment mono-
Fig. 1 shows the concrete structure block diagram of the adjustment System of the transfer of data that the embodiment of the present invention one provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention.In the present embodiment, the adjustment System of this transfer of data comprises: terminal 1 and server 2.Described terminal 1 is with described server 2 by wireless network communication, and wireless network includes but not limited to wifi, 3G, 4G and focus.
Wherein, described terminal 1 comprises:
Data transmission unit 11, if the monitoring request sending for receiving server, by wireless network, the coded data in encoder buffer district is sent to server, described coded data is that encoder carries out coded data with the coding parameter corresponding with present encoding rank;
In the present embodiment, described monitoring request is server carries out video monitoring request to terminal.Described coded data is the audio, video data that encoder is encoded with the corresponding coding parameter of present encoding rank, and encapsulates by Real-time Transport Protocol.Receive after the monitoring request that server 1 sends, terminal is sent to server so that server returns to packet loss by wireless network by coded data.
Average packet loss ratio acquiring unit 12, for according to the packet loss of the described coded data that described server returns in Preset Time, obtains average packet loss ratio;
In the present embodiment, described Preset Time is that systemic presupposition carries out the time period that packet loss is added up.Preferably, described Preset Time is 30s.The packet loss of described coded data refer in Preset Time in system lose coded data packet quantity and account for the ratio of sent coded data packet.Described average packet loss ratio refers to the mean value of several packet loss in Preset Time.Concrete, this unit is used for the packet loss of the described coded data that receives described server transmission, obtains the mean value of the packet loss of all described coded datas in described Preset Time, using described mean value as average packet loss ratio.
Adjust rank acquiring unit 13, for according to described present encoding rank and default code adjustment rank corresponding to described average packet loss ratio, obtain adjustment rank;
In the present embodiment, system is provided with the default code adjustment rank that average packet loss ratio x is corresponding, as shown in the table:
| Average packet loss ratio | x<=1% | 4%=<x<25% | 25%=<x<40% | 40%=<x |
| Adjust rank | -1 | 1 | 2 | 3 |
Wherein adjust rank have negative value have on the occasion of, when adjusting rank while being less than or equal to 1%, represent that current network signal is very good, meet the required transmission bandwidth of audio/video flow, can improve present encoding rank to improve the monitor video effect of server; When adjustment rank is more than or equal to 4%, represent the non-constant of current network signal, can not meet the required transmission bandwidth of audio/video flow, need to reduce present encoding rank so that server obtains stability monitoring video; When adjusting rank, be greater than 1% and while being less than 4%, current network signal is normal, adjusts transfer of data.Concrete, this unit is specifically for using the difference of default code adjustment rank corresponding with described average packet loss ratio described present encoding rank as adjustment rank.If present encoding rank is 10, when average packet loss ratio is 4%, with reference to default code adjustment rank 1 corresponding to the described average packet loss ratio of upper table, adjusting so rank is that 10-1 is 9.
Coding parameter setting unit 14, for described adjustment rank, be set to the present encoding rank of described encoder so that described encoder according to arrange after coding parameter corresponding to present encoding rank encode and be sent to the coded data of described server in next Preset Time;
In the present embodiment, according to current network signal power, reset the present encoding rank of described encoder, restart encoder, encoder is encoded in next Preset Time and is sent to the coded data of described server according to the corresponding coding parameter of present encoding rank after arranging, and then reaches the object of adjusting transfer of data.Concrete, this unit is specifically for obtaining default frame per second corresponding to described adjustment rank and default resolution, described default frame per second and default resolution be set to described encoder coding parameter so that described encoder according to the corresponding coding parameter of the present encoding rank after arranging, encode and be sent to the coded data of described server in next Preset Time.
Described server 2 comprises:
Described server comprises:
Packet loss feedback unit 22, for according to the quantity of described coded data receiving and the quantity of the described coded data of transmission, calculates packet loss and is sent to described terminal.
In the present embodiment, server receives the coded data that described terminal sends, and according to the quantity of the described coded data of the quantity of the described coded data receiving and transmission, calculates packet loss and is sent to described terminal.
Further, described terminal also comprises:
Judging unit, for judging that whether described adjustment rank exceedes default adjusting range, does not if so, arrange the code level of encoder.
In the present embodiment, before resetting present encoding rank, terminal need to judge whether described adjustment rank exceedes default adjusting range, if, the code level of encoder is not set, be that network signal does not have large variation or network signal is fabulous, network signal is when interrupt in Preset Time, maintain present encoding rank constant.
The present embodiment, native system in data transmission procedure constantly the packet loss by server feedback adjust coding parameter to adapt to the code check transmission data of current network signal, make video monitoring more stable.
Embodiment bis-
Fig. 2 shows the realization flow of the method for adjustment of the transfer of data that the embodiment of the present invention two provides, and take terminal as subject of implementation, details are as follows:
In step S201, if receive the monitoring request that server sends, by wireless network, the coded data in encoder buffer district is sent to server, described coded data is that encoder carries out coded data with the coding parameter corresponding with present encoding rank.In step S202, according to the packet loss of the described coded data that described server returns in Preset Time, obtain average packet loss ratio.
In the present embodiment, this step is specially the packet loss of the described coded data that receives described server transmission, obtains the mean value of the packet loss of described coded data in Preset Time, using described mean value as average packet loss ratio.
In step S203, according to described present encoding rank and default code adjustment rank corresponding to described average packet loss ratio, obtain adjustment rank.
In the present embodiment, this step is specially using the difference of default code adjustment rank corresponding with described average packet loss ratio described present encoding rank as adjusting rank.
As a preferred version, after this step, also comprise and judge that whether described adjustment rank exceedes default adjusting range, does not if so, arrange the code level of encoder.
In step 204, described adjustment rank is set to the present encoding rank of described encoder so that described encoder according to arrange after coding parameter corresponding to present encoding rank encode and be sent to the coded data of described server in next Preset Time.
In the present embodiment, this step is specially obtains default frame per second corresponding to described adjustment rank and default resolution, described default frame per second and described default resolution are set to the coding parameter of described encoder, so that described encoder is encoded and is sent to the coded data of described server in next Preset Time according to described coding parameter.
The present embodiment, can reach in data transmission procedure the constantly packet loss by server feedback and adjust coding parameter to adapt to the code check transmission data of current network signal, makes video monitoring more stable, has improved greatly user's experience.
The method of adjustment of the transfer of data that the embodiment of the present invention provides can be applied in the system embodiment one of aforementioned correspondence, and details, referring to the description of above-described embodiment one, do not repeat them here.
It should be noted that in said system embodiment, included unit is just divided according to function logic, but is not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit also, just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
In addition, one of ordinary skill in the art will appreciate that all or part of step realizing in the various embodiments described above method is can carry out the hardware that instruction is relevant by program to complete, corresponding program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an adjustment System for transfer of data, comprises terminal and server, it is characterized in that, described terminal comprises:
Data transmission unit, if the monitoring request sending for receiving server, by wireless network, the coded data in encoder buffer district is sent to server, described coded data is that encoder carries out coded data with the coding parameter corresponding with present encoding rank;
Average packet loss ratio acquiring unit, for according to the packet loss of the described coded data that described server returns in Preset Time, obtains average packet loss ratio;
Adjust rank acquiring unit, for according to described present encoding rank and default code adjustment rank corresponding to described average packet loss ratio, obtain adjustment rank;
Coding parameter setting unit, for described adjustment rank, be set to the present encoding rank of described encoder so that described encoder according to arrange after coding parameter corresponding to present encoding rank encode and be sent to the coded data of described server in next Preset Time;
Described server comprises:
Data receiver unit, the coded data sending for receiving described terminal;
Packet loss feedback unit, for according to the quantity of described coded data receiving and the quantity of the described coded data of transmission, calculates packet loss and is sent to described terminal.
2. system as claimed in claim 1, it is characterized in that, described average packet loss ratio acquiring unit is specifically for the packet loss of the described coded data that receives described server and send, obtain the mean value of the packet loss of all described coded datas in described Preset Time, using described mean value as average packet loss ratio.
3. system as claimed in claim 1, is characterized in that, described adjustment rank acquiring unit is specifically for using the difference of default code adjustment rank corresponding with described average packet loss ratio described present encoding rank as adjusting rank.
4. system as claimed in claim 1, it is characterized in that, described coding parameter setting unit is specifically for obtaining default frame per second corresponding to described adjustment rank and default resolution, described default frame per second and described default resolution are set to the coding parameter of described encoder, so that described encoder is encoded and is sent to the coded data of described server in next Preset Time according to described coding parameter.
5. the system as described in claims 1 to 4 any one, is characterized in that, described terminal also comprises:
Judging unit, for judging that whether described adjustment rank exceedes default adjusting range, does not if so, arrange the code level of encoder.
6. a method of adjustment for transfer of data, is characterized in that, described method comprises:
If receive the monitoring request that server sends, by wireless network, the coded data in encoder buffer district is sent to server, described coded data is that encoder carries out coded data with the coding parameter corresponding with present encoding rank;
According to the packet loss of the described coded data that described server returns in Preset Time, obtain average packet loss ratio;
According to described present encoding rank and default code adjustment rank corresponding to described average packet loss ratio, obtain adjustment rank;
Described adjustment rank is set to the present encoding rank of described encoder so that described encoder according to arrange after coding parameter corresponding to present encoding rank encode and be sent to the coded data of described server in next Preset Time.
7. method as claimed in claim 6, is characterized in that the packet loss of the described basis described coded data that described server returns in Preset Time obtains average packet loss ratio and is specially:
Receive the packet loss of the described coded data of described server transmission, obtain the mean value of the packet loss of described coded data in Preset Time, using described mean value as average packet loss ratio.
8. method as claimed in claim 6, is characterized in that, described according to described present encoding rank and default code adjustment rank corresponding to described average packet loss ratio, obtains to adjust rank and be specially:
Using the difference of default code adjustment rank corresponding with described average packet loss ratio described present encoding rank as adjusting rank.
9. method as claimed in claim 6, it is characterized in that, described adjustment rank is set to the present encoding rank of described encoder so that described encoder according to arrange after coding parameter corresponding to the present encoding rank coded data that is sent to described server in next Preset Time of encoding be specially:
Obtain default frame per second corresponding to described adjustment rank and default resolution, described default frame per second and described default resolution are set to the coding parameter of described encoder, so that described encoder is encoded and is sent to the coded data of described server in next Preset Time according to described coding parameter.
10. the method as described in claims 6 to 9 any one, it is characterized in that, described adjustment rank is set to the present encoding rank of described encoder so that described encoder according to arrange after coding parameter corresponding to present encoding rank encode before being sent to the coded data of described server in next Preset Time and also comprise:
Judge that whether described adjustment rank exceedes default adjusting range, does not if so, arrange the code level of encoder.
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Application publication date: 20140430 |