CN105187440A - Method and system for transmitting video data by using UDP protocol - Google Patents
Method and system for transmitting video data by using UDP protocol Download PDFInfo
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- CN105187440A CN105187440A CN201510624960.XA CN201510624960A CN105187440A CN 105187440 A CN105187440 A CN 105187440A CN 201510624960 A CN201510624960 A CN 201510624960A CN 105187440 A CN105187440 A CN 105187440A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/762—Media network packet handling at the source
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/764—Media network packet handling at the destination
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/164—Adaptation or special uses of UDP protocol
Abstract
The invention discloses a method for transmitting video data by using a UDP protocol. The method comprises: a data sending end receives a video data transmission request sent by a data receiving end; the sending end establishes a UDP protocol connection with the receiving end according to the video data transmission request; the sending end divides video data to be sent into a plurality of data packets, adds file header information in each data packet according to the original order of the data packets, and respectively sends the data packets to the receiving end, wherein the file header information comprises: a frame serial number of a current video frame, the position of the current data packet in the video frame and the size of the current video frame; after receiving all data packets, the receiving end splices complete video data according to the order recorded in the file header information, and stores the video data. The received file data and the originally sent file data are guaranteed to have the same order, in order to avoid the data disorder phenomenon when transmitting the video data by using the UDP protocol.
Description
Technical field
The application relates to field of data transmission, specifically, relates to a kind of method and system using udp protocol transmitting video data.
Background technology
UDP is the abbreviation of UserDatagramProtocol, Chinese name is User Datagram Protoco (UDP), OSI (OpenSystemInterconnection, open system interconnection) a kind of connectionless transport layer protocol in reference model, there is provided the simple unreliable information transfer service towards affairs, IETFRFC768 is the formal specification of UDP.
Udp protocol full name is User Datagram Protoco (UDP), and it is the same as with Transmission Control Protocol packet in a network, is a kind of connectionless agreement.In osi model, at the 4th layer---transport layer, is in the last layer of IP agreement.UDP has the shortcoming not providing packet to divide into groups, assemble and can not sort to packet, that is, after message sends, cannot learn its whether safe and complete arrival.UDP is used for supporting that those need to transmit between the computers the network application of data.The network application comprising numerous Client/Server of Video Conference System all needs to use udp protocol.Udp protocol is employed a lot of year so far from appearance, although its initial brilliance cover by some similar agreements, even today UDP still to can yet be regarded as a very practical and feasible Internet Transmission layer protocol.
The same with known TCP (transmission control protocol) agreement, udp protocol is located immediately at the top layer of IP (Internet protocol) agreement.According to OSI (open system interconnection) reference model, UDP and TCP belongs to transport layer protocol.The Main Function of udp protocol is form network traffic data being compressed into packet.A typical packet is exactly the unit of transfer of a binary data.Front 8 bytes of each packet are used for comprising header information, and remainder bytes is then used for comprising concrete transmission data.
Udp protocol can not provide the pledge system of transfer of data, and such as, the data-bag lost occurred in transmit leg to recipient's transmittance process, UDP itself can not make any detection or prompting.But in the application network environment such as P2P technology, due to the existence of internet firewall and NAT gateway, two main frames not necessarily connect by Transmission Control Protocol, and then carry out transfer of data.But in these network application environments, udp protocol but can carry out the transmission of corrupt data between two main frames.Transmission Control Protocol is easier makes data waiting for transmission arrive destination host smoothly than using to use udp protocol.
When adopting udp protocol to send video data, especially in video source data process of transmitting, when running into network condition and having the situation of fluctuation, very easily cause data evening of first sending to, the data sequence that the data sequence causing receiving terminal to receive and transmitting terminal send is inconsistent, namely occurs disorder phenomenon.When video stream data transmits, the phenomenon of the video playback exceptions such as disorder phenomenon can cause the flower screen of user side, card pauses, has a strong impact on user and watches video tastes.
Summary of the invention
In order to solve produced problem in the above prior art, the object of this invention is to provide a kind of method and system using udp protocol transmitting video data.
The invention provides a kind of method using udp protocol transmitting video data, comprising:
Data sending terminal receives the video data transmission request that data receiver sends;
Described transmitting terminal is set up udp protocol according to described video data transmission request with described receiving terminal and is connected;
Video data to be sent is divided into multiple packet by described transmit leg, adds File header information, and described packet is sent to described receiving terminal respectively according to the original order of described packet in each packet, wherein,
Described File header information comprises: the frame number of current video frame, current data wrap in the size of position in this frame of video and current video frame;
After described receiving terminal receives all packets, become complete video data according to the sequential concatenation recorded in File header information and preserve.
Further, wherein, video data to be sent is divided into multiple packet by described transmit leg, comprises further:
Be that 1316 bytes are divided into multiple packet by described video data to be sent according to size.
Further, wherein, after described receiving terminal receives all packets, become complete video data according to the sequential concatenation recorded in File header information and preserve, comprising further:
When the sequence number receiving packet equals the current video frame number received, by this packet according to its position in this frame of video stored in data buffer zone;
When the packet sequence number received is not equal to the current video frame number received, by this packet according to current video frame number stored in data buffer zone.
Further, wherein, comprise further:
At the packet of each reception stored in after in data buffer zone, the data in described buffering area are exported, and described buffering area is reapposed in buffer queue tail of the queue position.
Further, wherein, comprise further:
When the packet sequence number received is much smaller than the frame of video sequence number received, be that the buffer data of current data packet sequence number abandons by the sequence number in buffer queue, and this buffering area is reapposed in buffer queue tail of the queue position.
Use a system for udp protocol transmitting video data, comprising: sending module, processing module and receiver module, wherein,
Described sending module, for receiving the video data transmission request that data receiver sends, and sets up udp protocol according to described video data transmission request with described receiving terminal and is connected;
Described processing module, for video data to be sent is divided into multiple packet, adds File header information according to the original order of described packet, and described packet is sent to described receiving terminal respectively in each packet, wherein,
Described File header information comprises: the frame number of current video frame, current data wrap in the size of position in this frame and current video frame;
Described receiver module, after receiving all packets, becomes complete video data according to the sequential concatenation recorded in File header information and preserves.
Further, wherein, described processing module, is further used for:
Be that 1316 bytes are divided into multiple packet by described video data to be sent according to size.
Further, wherein, described receiver module, is further used for:
When the sequence number receiving packet equals the current video frame number received, by this packet according to its position in this frame stored in data buffer zone;
When the packet sequence number received is not equal to the current video frame number received, by this packet according to current video frame number stored in data buffer zone.
Further, wherein, described receiver module, is further used for:
At the packet of each reception stored in after in data buffer zone, the data in described buffering area are exported, and described buffering area is reapposed in buffer queue tail of the queue position.
Further, wherein, described receiver module, is further used for:
When the packet sequence number received is much smaller than the frame of video sequence number received, be that the buffer data of current data packet sequence number abandons by the sequence number in buffer queue, and this buffering area is reapposed in buffer queue tail of the queue position.
Compared with prior art, a kind of method and system using udp protocol transmitting video data described in the application, have the following advantages:
(1) Data Segmentation to be sent is become multiple packet by the present invention, after being numbered with the File header information comprising the information such as data packet locations, is sent respectively by packet each packet.Receiving terminal according to receiving packet, according to its File header information splice, recover the correct order of packet.So, ensure that the file data order of file data and the original transmission received is identical, avoid when adopting udp protocol to send video data and occur the phenomenon that data are out of order.
(2) when the present invention carries out transfer of data between data receiver and data receiver, multiple packet is become to carry out transfer of data Data Segmentation to be sent, large files is divided into multiple small documents to send, improve data transmission efficiency, avoid the phenomenons such as unstable networks and large files is transmitted to the impact caused.
Certainly, the arbitrary product implementing the application must not necessarily need to reach above-described all technique effects simultaneously.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present application, and form a application's part, the schematic description and description of the application, for explaining the application, does not form the improper restriction to the application.In the accompanying drawings:
Fig. 1 is the method step schematic flow sheet of use udp protocol of the present invention transmission data;
Fig. 2 is the method step schematic flow sheet of the use udp protocol transmission data described in the embodiment of the present invention 2;
Fig. 3 is the system architecture diagram schematic diagram of use udp protocol of the present invention transmission data.
Embodiment
As employed some vocabulary to censure specific components in the middle of specification and claim.Those skilled in the art should understand, and hardware manufacturer may call same assembly with different noun.This specification and claims are not used as with the difference of title the mode distinguishing assembly, but are used as the criterion of differentiation with assembly difference functionally." comprising " as mentioned in the middle of specification and claim is in the whole text an open language, therefore should be construed to " comprise but be not limited to "." roughly " refer to that in receivable error range, those skilled in the art can solve the technical problem within the scope of certain error, reach described technique effect substantially.In addition, " couple " word and comprise directly any and indirectly electric property coupling means at this.Therefore, if describe a first device in literary composition to be coupled to one second device, then represent described first device and directly can be electrically coupled to described second device, or be indirectly electrically coupled to described second device by other devices or the means that couple.Specification subsequent descriptions is implement the better embodiment of the application, and right described description is for the purpose of the rule that the application is described, and is not used to the scope limiting the application.The protection range of the application is when being as the criterion depending on the claims person of defining.
Below in conjunction with accompanying drawing, the application is described in further detail, but not as the restriction to the application.
Embodiment 1:
As shown in Figure 1, be the method for the use udp protocol transmitting video data described in the embodiment of the present invention 1, comprise:
Step 101, data sending terminal receives the video data transmission request that data receiver sends, with the information of receiving terminal in described data transfer request.
Step 102, described transmitting terminal is set up udp protocol according to described video data transmission request with described receiving terminal and is connected, and transmitting terminal connects, for subsequent data transmission is ready according to the receiving terminal information of carrying in described request and described receiving terminal.
Step 103, video data to be sent is divided into multiple packet by described transmit leg, adds File header information, and described packet is sent to described receiving terminal respectively according to the original order of described packet in each packet, wherein,
Described File header information comprises: the frame number of current video frame, current data wrap in the size of position in this frame and current video frame.
Described File header information contains each partition data and wraps in positional information in original, and preferably, described File header information contains each partition data and wraps in positional information in frame of video belonging to it.
Step 104, after described receiving terminal receives all packets, becomes complete video data according to the sequential concatenation recorded in File header information and preserves, wherein,
After receiving terminal receives the data after each segmentation, positional information according to this divided file bag comprised in File header information is spliced according to the sequence of positions of original video frame data, form complete video data and preserve, reaching the video data preserved at receiving terminal after the transmission order according to original video data.
Embodiment 2:
As shown in Figure 2, be the method for the use udp protocol transmitting video data described in the embodiment of the present invention 2, comprise:
Step 201, data sending terminal receives the video data transmission request that data receiver sends;
Step 202, described transmitting terminal is set up udp protocol according to described video data transmission request with described receiving terminal and is connected;
Step 203, video data to be sent is that 1316 bytes are divided into multiple packet according to size by described transmit leg, adds File header information, and described packet is sent to described receiving terminal respectively according to the original order of described packet in each packet, wherein
Described File header information comprises: the frame number of current video frame, current data wrap in the size of position in this frame and current video frame;
Step 204, after described receiving terminal receives all packets, becomes complete video data according to the sequential concatenation recorded in File header information and preserves, wherein,
When the sequence number receiving packet equals the current video frame number received, by this packet according to its position in this frame stored in data buffer zone;
When the packet sequence number received is not equal to the current video frame number received, by this packet according to current video frame number stored in data buffer zone.
Preferably, at the packet of each reception stored in after in data buffer zone, the data in described buffering area are exported, and described buffering area is reapposed in buffer queue tail of the queue position.
More preferably, when the packet sequence number received is much smaller than the frame of video sequence number received, be that the buffer data of current data packet sequence number abandons by the sequence number in buffer queue, and this buffering area is reapposed in buffer queue tail of the queue position.
Embodiment 3:
As shown in Figure 3, be the system of the use udp protocol transmitting video data described in the embodiment of the present invention 3, this comprises: sending module 301, processing module 302 and receiver module 303,
Described sending module 301, connects with described processing module 302 phase lotus root, for receiving the video data transmission request that data receiver sends, and sets up udp protocol according to described video data transmission request with described receiving terminal and is connected;
Described processing module 302, connect with described sending module 301 and described receiver module 303 phase lotus root, for video data to be sent is divided into multiple packet, in each packet, File header information is added according to the original order of described packet, and described packet is sent to described receiving terminal respectively, wherein
Described File header information comprises: the frame number of current video frame, current data wrap in the size of position in this frame and current video frame;
Described receiver module 303, connects with described processing module 302 phase lotus root, after receiving all packets, becomes complete video data and preserve according to the sequential concatenation recorded in File header information.
Wherein, described processing module, is further used for:
Be that 1316 bytes are divided into multiple packet by described video data to be sent according to size.
Described receiver module, is further used for:
When the sequence number receiving packet equals the current video frame number received, by this packet according to its position in this frame stored in data buffer zone;
When the packet sequence number received is not equal to the current video frame number received, by this packet according to current video frame number stored in data buffer zone.
Described receiver module, further also for:
At the packet of each reception stored in after in data buffer zone, the data in described buffering area are exported, and described buffering area is reapposed in buffer queue tail of the queue position.
Described receiver module, further also for:
When the packet sequence number received is much smaller than the frame of video sequence number received, be that the buffer data of current data packet sequence number abandons by the sequence number in buffer queue, and this buffering area is reapposed in buffer queue tail of the queue position.
Compared with prior art, a kind of method and system using udp protocol to transmit data described in the application, have the following advantages:
(1) Data Segmentation to be sent is become multiple packet by the present invention, after being numbered with File header information, is sent respectively by packet each packet.Receiving terminal according to receiving packet, according to its File header information splice, recover the correct order of packet.So, ensure that the file data order of file data and the original transmission received is identical, avoid when adopting udp protocol to send video data and occur the phenomenon that data are out of order.
(2) when the present invention carries out transfer of data between data receiver and data receiver, multiple packet is become to carry out transfer of data Data Segmentation to be sent, large files is divided into multiple small documents to send, improve data transmission efficiency, avoid the phenomenons such as unstable networks and large files is transmitted to the impact caused.
Above-mentioned explanation illustrate and describes some preferred embodiments of the application, but as previously mentioned, be to be understood that the application is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in application contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the application, then all should in the protection range of the application's claims.
Claims (10)
1. use a method for udp protocol transmitting video data, it is characterized in that, comprising:
Data sending terminal receives the video data transmission request that data receiver sends;
Described transmitting terminal is set up udp protocol according to described video data transmission request with described receiving terminal and is connected;
Video data to be sent is divided into multiple packet by described transmit leg, adds File header information, and described packet is sent to described receiving terminal respectively according to the original order of described packet in each packet, wherein,
Described File header information comprises: the frame number of current video frame, current data wrap in the size of position in this frame of video and current video frame;
After described receiving terminal receives all packets, become complete video data according to the sequential concatenation recorded in File header information and preserve.
2. the method for use udp protocol transmitting video data according to claim 1, it is characterized in that, video data to be sent is divided into multiple packet by described transmit leg, comprises further:
Be that 1316 bytes are divided into multiple packet by described video data to be sent according to size.
3. the method for use udp protocol transmitting video data according to claim 1, is characterized in that, after described receiving terminal receives all packets, becomes complete video data and preserves, comprise further according to the sequential concatenation recorded in File header information:
When the sequence number receiving packet equals the current video frame number received, by this packet according to its position in this frame of video stored in data buffer zone;
When the packet sequence number received is not equal to the current video frame number received, by this packet according to current video frame number stored in data buffer zone.
4. the method for use udp protocol transmitting video data according to claim 3, is characterized in that, comprise further:
At the packet of each reception stored in after in data buffer zone, the data in described buffering area are exported, and described buffering area is reapposed in buffer queue tail of the queue position.
5. the method for use udp protocol transmitting video data according to claim 3, is characterized in that, comprise further:
When the packet sequence number received is much smaller than the frame of video sequence number received, be that the buffer data of current data packet sequence number abandons by the sequence number in buffer queue, and this buffering area is reapposed in buffer queue tail of the queue position.
6. use a system for udp protocol transmitting video data, it is characterized in that, comprising: sending module, processing module and receiver module, wherein,
Described sending module, for receiving the video data transmission request that data receiver sends, and sets up udp protocol according to described video data transmission request with described receiving terminal and is connected;
Described processing module, for video data to be sent is divided into multiple packet, adds File header information according to the original order of described packet, and described packet is sent to described receiving terminal respectively in each packet, wherein,
Described File header information comprises: the frame number of current video frame, current data wrap in the size of position in this frame and current video frame;
Described receiver module, after receiving all packets, becomes complete video data according to the sequential concatenation recorded in File header information and preserves.
7. the system of use udp protocol transmitting video data according to claim 6, it is characterized in that, described processing module, is further used for:
Be that 1316 bytes are divided into multiple packet by described video data to be sent according to size.
8. the system of use udp protocol transmitting video data according to claim 6, it is characterized in that, described receiver module, is further used for:
When the sequence number receiving packet equals the current video frame number received, by this packet according to its position in this frame stored in data buffer zone;
When the packet sequence number received is not equal to the current video frame number received, by this packet according to current video frame number stored in data buffer zone.
9. the system of use udp protocol transmitting video data according to claim 8, it is characterized in that, described receiver module, is further used for:
At the packet of each reception stored in after in data buffer zone, the data in described buffering area are exported, and described buffering area is reapposed in buffer queue tail of the queue position.
10. the system of use udp protocol transmitting video data according to claim 8, it is characterized in that, described receiver module, is further used for:
When the packet sequence number received is much smaller than the frame of video sequence number received, be that the buffer data of current data packet sequence number abandons by the sequence number in buffer queue, and this buffering area is reapposed in buffer queue tail of the queue position.
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