CN101854224B - Error correcting coding method, device and system, and forwarding control method and device - Google Patents
Error correcting coding method, device and system, and forwarding control method and device Download PDFInfo
- Publication number
- CN101854224B CN101854224B CN200910132374.8A CN200910132374A CN101854224B CN 101854224 B CN101854224 B CN 101854224B CN 200910132374 A CN200910132374 A CN 200910132374A CN 101854224 B CN101854224 B CN 101854224B
- Authority
- CN
- China
- Prior art keywords
- error correction
- correction coding
- message
- media data
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The invention discloses an error correcting coding method, comprising the steps: acquiring frame type to which the contents of media data messages belong, wherein the frame type comprises a basic frame and a predicative frame; implementing error correcting coding with different redundancy on the media data message with the basic frame as the content and on the media data message with the predicative frame as the content, wherein the redundancy of the error correcting coding, to which the media data message with the basic frame as the content is corresponding, is larger than that of the error correcting coding, to which the media data message with the predicative frame as the content is corresponding. The invention further provides a forwarding control method, a forwarding control device as well as an error correcting coding device and an error correcting coding system. According to the technical proposal provided by the embodiment of the invention, the basic frame in media data can be protected to a maximal extent and network resource can be saved in case of enhancing the transmission quality of the media data.
Description
Technical field
The present invention relates to network communications technology field, be specifically related to a kind of error correction/encoding method and device, system and transmission control method and device.
Background technology
Along with the fast development of network technology, on communication network, Video Applications increases gradually, and the transmission quality that improves video is a major issue.Due to the requirement of real-time of video traffic, the transport layer of communication network generally adopts RTP (Real-time Transport Protocol, RTP) message transmissions media data.Head end is encoded to media data, produces the media data message that is adapted at transmission over networks, and RTP message is a type of media data message.Media data message uses the form encapsulated delivery of UDP (User DatagramProtocol, User Datagram Protoco (UDP)) datagram.UDP is a kind of towards connectionless, insecure transmission mechanism, needs upper-layer protocol that quality assurance is provided.In the prior art, use error correction coding that the error control of transfer of data is provided to media data message.Error correction coding is mainly by carrying out error correction coding operation to media data message, media data message is increased to redundant information, media data message is generated to the code word that has redundancy by certain rule, if media data message makes a mistake in transmitting procedure, the information of error of transmission can be found and be recovered according to error correction coding to receiving terminal voluntarily.
The process of carrying out error correction coding and forwarding in prior art is:
Encoder for correcting receives the media data message from head end, to unified error correction coding protection mechanism for media datagrams literary grace.For example K media data message is an encoding block, carries out producing H error correction coding message after error correction coding.Coding dispensing device selects to the network performance between coding dispensing device the error correction coding message amount sending according to user side, if each user side is to the network performance difference between coding dispensing device, be as the criterion with the poorest network environment, selectivity sends the quantity of error correction coding message.For example X error correction coding message of above-mentioned K the corresponding transmission of media data message, measure all user sides if current better to the network performance of coding dispensing device, so this K corresponding (X-1) individual error correction coding message that sends of media data message; If some user sides are bad to the network performance between coding dispensing device, coding dispensing device is as the criterion with the poorest network environment, sends all X error correction coding message.The error correction coding message receiving is directly transmitted to user side by forwarding unit in access network.
Inventor finds realizing in process of the present invention, it in prior art, is guarantee user terminal video quality, to unified error correction coding protection mechanism for the media datagrams literary grace of transmitting video-frequency flow, although can recover the media data message of some, if but the larger important frame of video quality impact is not resumed, the video quality of user side still cannot ensure, although to the unified error correction coding that adopts highly redundant degree of media data message, can ensure that receiving terminal obtains the video of better quality, but adopt the error correction coding of highly redundant degree will produce a large amount of error correction coding messages, the Internet resources of waste core net and Access Network.
Summary of the invention
For code correction method in solution prior art can not well ensure the problem of video quality; the invention provides a kind of frame type in media data message of distinguishing; and the media data message of different frame type in media data message is carried out to the method for the error correction coding of different redundancys; strengthen the protection to important frame, thereby ensure the video quality of receiving terminal.
The error correction/encoding method that the embodiment of the present invention provides, comprising: obtain the affiliated frame type of message content of media data message, this frame type comprises basic frame and predictive frame; The media datagrams literary grace that the media data message that is basic frame to message content is predictive frame with message content is carried out error correction coding by different redundancys, and the redundancy of the corresponding error correction coding of media data message that message content is basic frame is greater than the redundancy that message content is the corresponding error correction coding of media data message of predictive frame.
The embodiment of the present invention also provides a kind of transmission control method, comprising: the network performance that obtains Access Network; The type that needs the error correction coding message flow forwarding according to the network performance judgement of Access Network, the type of this error correction coding message flow comprises that message content is the corresponding error correction coding message flow of media data message of basic frame and the corresponding error correction coding message flow of media data message that message content is predictive frame; Obtain the identification information that needs the error correction coding message flow forwarding, issue the forward command that comprises this identification information, make Access Network realize the forwarding to error correction coding message flow according to this identification information.
The embodiment of the present invention also provides a kind of encoder for correcting, comprising: frame type acquiring unit, and for obtaining the frame type under the message content of media data message, this frame type comprises basic frame and predictive frame; Coding unit, the media datagrams literary grace that is predictive frame with message content for the media data message that is basic frame to message content is carried out error correction coding by different redundancys, and the redundancy of the corresponding error correction coding of media data message that message content is basic frame is greater than the redundancy that message content is the corresponding error correction coding of media data message of predictive frame.
The embodiment of the present invention also provides a kind of forwarding controller, comprising: network performance acquiring unit, for obtaining the network performance of Access Network; Forward processing unit, for need the type of the error correction coding message flow forwarding according to the network performance judgement of Access Network, the type of this error correction coding message flow comprises that message content is the corresponding error correction coding message flow of media data message of basic frame and the corresponding error correction coding message flow of media data message that message content is predictive frame; Mark acquiring unit, for obtaining the identification information that needs the error correction coding message flow forwarding; Order issues unit, for issuing the forward command of the identification information that comprises error correction coding message flow.
The embodiment of the present invention also provides a kind of error correction coding system, comprising: encoder for correcting, and for obtaining the frame type under the message content of media data message, this frame type comprises basic frame and predictive frame; The media datagrams literary grace that the media data message that is basic frame to message content is predictive frame with message content is carried out error correction coding by different redundancys, and the redundancy of the corresponding error correction coding of media data message that message content is basic frame is greater than the redundancy that message content is the corresponding error correction coding of media data message of predictive frame; Coding dispensing device, error correction coding for the different redundancys to after encoder for correcting coding is used different error correction coding message flows to send and forwarding controller, for need the type of the error correction coding message flow forwarding according to the network performance judgement of Access Network, issue the forward command of the identification information of the error correction coding message flow that comprises needs forwarding, so that Access Network is realized the forwarding to error correction coding message flow according to this identification information.
Because the significance level of basic frame in media data is greater than the significance level of predictive frame, the redundancy of the corresponding error correction coding of media data message that error correction/encoding method embodiment of the present invention is basic frame for message content is greater than the redundancy that message content is the corresponding error correction coding of media data message of predictive frame, therefore can be in the situation that average redundancy be constant, protect to greatest extent the basic frame in media data, reduce the protection to predictive frame, can solve in prior art adopts identical redundancy to carry out the video quality problem that error correction coding is brought to frames all in media data, the media data quality receiving in the case of raising user, save the Internet resources of core net and Access Network.
Brief description of the drawings
Fig. 1 is the flow chart of error correction/encoding method embodiment of the present invention;
Fig. 2 is error correction/encoding method embodiment of the present invention carries out error correction coding schematic diagram to media data;
Fig. 3 is the flow chart of transmission control method embodiment of the present invention;
Fig. 4 is the schematic diagram of encoder for correcting embodiment of the present invention;
Fig. 5 is the schematic diagram of forwarding controller embodiment of the present invention;
Fig. 6 is the schematic diagram of error correction coding system embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of error correction/encoding method, device and system and transmission control method and has realized the device of the method.Technical scheme for a better understanding of the present invention, is described in detail embodiment provided by the invention below in conjunction with accompanying drawing.
The embodiment of the present invention provides a kind of error correction/encoding method, and error correction/encoding method idiographic flow, referring to Fig. 1, comprising:
Step 101, obtain the frame type under the message content of media data message, described frame type comprises basic frame and predictive frame.
The media datagrams literary grace that step 102, the media data message that is basic frame to message content are predictive frame with message content is carried out error correction coding by different redundancys, and the redundancy of the message content corresponding error correction coding of media data message that is basic frame is greater than the redundancy that message content is the corresponding error correction coding of media data message of predictive frame.
The redundancy of the corresponding error correction coding of media data message that error correction/encoding method embodiment of the present invention is basic frame for message content is greater than the redundancy that message content is the corresponding error correction coding of media data message of predictive frame; therefore can be in the situation that average redundancy be constant; protect to greatest extent the basic frame in media data; reduce the protection to predictive frame, can solve in prior art and adopt identical redundancy to carry out the video quality problem that error correction coding is brought to frames all in media data.Be to improve the media data quality that receives of user and increase compared with the redundancy of error correction coding with prior art, the media data quality that the present invention can receive in the case of raising user, keep the average redundancy of error correction coding, thereby save the Internet resources of core net.
Concrete, in embodiments of the present invention, the method for obtaining the frame type under the message content of media data message in step 101 mainly contains:
Obtain the frame type under the message content of media data message according to the frame type indication information from head end, in this frame type indication information, comprise the sequence number of media data message at basic frame place and the sequence number of the media data message at predictive frame place.Because each media data message comprises unique sequence number, therefore receiving after media data message, can judge the frame type under the message content of the media data message receiving according to the sequence number of media data message and frame type indication information.
Further, can also judge the frame type under the message content of media data message according to the label information of media data message.In the time that the marker of media data message mark position is " 1 ", represent that the media data message that this frame is divided into finishes, the message amount in the middle of the media data message that two marker marker bits are " 1 " is the message amount that this frame is divided into.Therefore can judge the media data message quantity that each frame is divided into according to the marker marker bit of media data message head.Conventionally in media data, the capacity of basic frame is greater than the capacity of predictive frame, the media data message quantity that basic frame is divided into is greater than the media data message quantity that predictive frame is divided into, and therefore can judge the frame type under the message content of media data message according to the label information of media data message.
Further, can also decode to the media data message receiving, by judging that the frame type of decoded media data obtains the frame type under the message content of media data message.
Concrete, the error correction coding process that dissimilar frame is carried out to different redundancys in step 102 is:
With MPEG-4 (Moving Pictures Experts Group, dynamic image expert group) coding media data be example, basic frame is I frame, predictive frame is that P frame and B frame are example, the significance level of I frame, P frame, B frame reduces successively, for the media data of encoded in different formats, the type of its basic frame and predictive frame is not limited to I frame, P frame and B frame, can make the frame of other type, the inventive method embodiment also can carry out for frame important in the media data of other form and less important frame the error correction coding of different redundancys.
In embodiments of the present invention, the error correction coding corresponding media data message of I frame in media data, the corresponding media data message of P frame and the corresponding media datagrams literary grace of B frame being reduced successively by redundancy is encoded.In media data, the protection of the corresponding media data message of I frame, the corresponding media data message of P frame and the corresponding media data message of B frame reduces successively.The error correction coding that uses redundancy to reduce successively by the corresponding media data message of the corresponding media data message of the I frame in predictive frame, the corresponding media data message of P frame and B frame is encoded; can be in the situation that average redundancy be constant; increase the protection to I frame and P frame; reduce the protection to B frame; also can improve the efficiency to media data error correction coding; increase the probability that I frame and P frame are repaired; thereby improve the media data quality receiving, and can save the Internet resources of core net.
In embodiments of the present invention, can be to the media data message forward error correction that interweaves, the type of error correction coding is not limited to this, can also be RS (Reed-Solomon, Reed-Suo Luoman) coding or other error correction coding.
Provide a concrete application scenarios of error correction/encoding method of the present invention below.For example, form 1 is 1.5MMPEG-4 coding GOP (Group Of Picture, picture group)=12 o'clock, and in a certain section of video, I/P/B frame is divided into the situation of RTP message.For example an I frame has been divided into 14 RTP messages, is divided into 15 RTP messages followed by two B frames, and a P frame is divided into 10 RTP messages, and the RTP message amount that I frame, P frame and B frame are divided into can calculate according to the size of this frame.
Form 1
| Frame type | RTP message number | Frame type | RTP message number | Frame type | RTP message number |
| I | 14 | B，B | 15 | |
10 |
In the time interweaving forward error correction coding, the affiliated frame type of message content of distinguishing RTP message, carries out respectively forward error correction coding to the RTP message at I/B/P frame place, divides separately D*L encoding block, every D*L RTP message is an encoding block, is arranged in the matrix of the capable L of the being multiplied by row of D.D RTP message of every row carries out XOR by bit, generates new error correction encoded data, and L new error correction encoded data is L the error correction coding message that interweaves, and redundancy is 1/D.In the time that receiving terminal is decoded, first wait for the data of an encoding block, arrange according to D*L, if part RTP message dropping wherein, according to the RTP message and the error correction coding message that receive, recovers the RTP message that these row are lost.
Because the real-time of video has limited each D*L coded block size, in the present embodiment, the RTP message amount that I/B/P frame is divided into is all little, so the RTP message that I frame of setting is divided into is an encoding block; Back to back two message contents are that B frame RTP message is second encoding block; The RTP message that next message content is P frame is the 3rd encoding block.In the time carrying out error correction coding, judge according to the marker marker bit of RTP header the RTP message amount that each frame is divided into, in media data, the capacity of I frame is greater than the capacity of P frame and B frame, so the RTP message amount that I frame is divided into is greater than the RTP message amount that P frame and B frame are divided into.
Referring to Fig. 2, Fig. 2 is embodiment of the present invention error correction/encoding method carries out error correction coding schematic diagram to media data message.
14 RTP messages that are divided into for I frame adopt the encoding block of 3*5 to encode, and the redundancy of forward error correction coding is 35.7%; 15 RTP messages that two continuous B frames are divided into adopt the encoding block of 5*3 to encode, and the redundancy of forward error correction coding is 20%; 10 RTP messages that P frame is divided into adopt the encoding block of 4*3 to carry out, and the redundancy of forward error correction coding is 33.3%.Message content is that the redundancy of the redundancy of the corresponding forward error correction coding of RTP message of I frame, the corresponding forward error correction coding of RTP message that message content is P frame and message content are that the redundancy of the corresponding forward error correction coding of RTP message of B frame reduces successively, under identical packet drop, the repair ability of I frame data is the strongest, and the repair ability of B frame data is the most weak.
In embodiments of the present invention, the redundancy of the corresponding forward error correction coding of RTP message that I/P/B frame is divided into is determined according to current network situation, for example, decide coding redundancy degree according to the poorest end to end network performance of user feedback.In this external cataloged procedure, can adjust in real time the redundancy of the corresponding forward error correction coding of RTP message that I, P, B frame be divided into.When network performance variation, the redundancy of the corresponding forward error correction coding of RTP message that raising I frame is divided into, the redundancy of the corresponding forward error correction coding of RTP message that reduction B frame is divided into, keeps average redundancy constant, lays special stress on protecting I frame; When network performance is improved, the redundancy of the corresponding forward error correction coding of RTP message that reduction I frame is divided into.If RTP message is adopted to RS error correction coding, can increase the protection of RTP message, to tackle poor Access Network environment.
Pass through said method; the media datagrams literary grace at frame place dissimilar in media data message is carried out to error correction coding by different redundancys; can be in the situation that average redundancy remains unchanged; increase the protection to basic frame in media data; message content is that after the media data message of basic frame is lost, the probability of recovery also can increase.Compared with prior art; not only can increase the protection to basic frame; can also solve and increase the problem brought of redundancy, in protection media data, between basic frame and predictive frame, reach balance, thereby save core net, converge the Internet resources of net and Access Network.
The embodiment of the present invention also provides a kind of transmission control method, specifically referring to Fig. 3, comprising:
Collect the network performance of Access Network connecting, network performance can comprise the packet loss, delay, shake of Access Network etc.
According to the network performance information of Access Network, judge the error correction coding message flow type that need to forward at different net environments, the type of error correction coding message flow comprises that message content is the corresponding error correction coding message flow of media data message of basic frame and the corresponding error correction coding message flow of media data message that message content is predictive frame.If current access network packet loss is less, only judges and need to forward the corresponding error correction coding message flow of basic frame.When packet loss is more, judgement need to forward the corresponding error correction coding message flow of basic frame and the corresponding error correction coding message flow of predictive frame.
Obtain the identification information that needs the error correction coding message flow forwarding, issue the forward command that comprises described identification information to access network.Forwarding unit in access network receives forward command, forwards corresponding error correction coding message flow according to the identification information of error correction coding message flow to user.
In embodiments of the present invention, if current Access Network packet loss is less, issue the forward command of the identification information that comprises the corresponding error correction coding message flow of basic frame, only the E-Packet corresponding error correction coding message flow of media data message of the basic frame of content of the forwarding unit in access network.If current Access Network packet loss is more, issue the forward command of the identification information of the identification information that comprises the corresponding error correction coding message flow of basic frame and the corresponding error correction coding message flow of predictive frame, the content that E-Packets of the forwarding unit in access network is the corresponding error correction coding message flow of media data message of basic frame and the corresponding error correction coding message flow of media data message that message content is predictive frame.Compared with prior art, not only can forward for different Access Networks the error correction coding message of varying number, can also save the Internet resources of Access Network.User carries out the decode procedure of error correction coding according to the media data message stream receiving and error correction coding message flow, recover the media data message of losing in media data message stream, wherein the forwarding unit in access network can be digital subscriber line access multiplex.
In embodiments of the present invention, the type of error correction coding message flow comprises that message content is that the corresponding error correction coding message flow of media data message of I frame, the corresponding error correction coding message flow of media data message and the message content that message content is P frame are the corresponding error correction coding message flow of media data message of B frame.In the time that the packet loss of Access Network is less than or equal to 1%, judge the corresponding error correction coding message flow of media data message that the content that need to E-Packet is I frame; Be greater than 1% and while being less than or equal to 5% at packet loss, judge the corresponding error correction coding message flow of media data message that the corresponding error correction coding message flow of media data message that the content that need to E-Packet is I frame and message content are P frame; In the time that packet loss is greater than 5%, judgement need to forward all error correction coding message flows.It is pointed out that the embodiment of the present invention can, according to current network condition adjustment forwarding strategy, include but not limited to above-mentioned forwarding strategy in actual applications.
In the inventive method embodiment, obtain and need the identification information of the error correction coding message flow forwarding can pass through inquiry error correction coding message flow concordance list, form 1 is error correction coding message flow concordance list in the embodiment of the present invention.
Form 1
| Mark 1 | The corresponding error correction coding message flow of media data message of I |
| Mark | |
| 2 | The corresponding error correction coding message flow of media data message of P frame |
| Mark 3 | The corresponding error correction coding message flow of media data message of B frame |
In error correction coding message flow concordance list, comprising message content is identification information, the identification information of the corresponding error correction coding message flow of media data message of P frame and the identification information of the corresponding error correction coding message flow of media data message of B frame of the corresponding error correction coding message flow of media data message of I frame, wherein the identification information of error correction coding message flow can be configured by head end, this identification information is left in error correction coding message flow concordance list by signalling path by head end.
In the inventive method embodiment, the identification information of error correction coding message flow can be the five-tuple information of IP datagram, i.e. source IP address, object IP address, source port number, destination slogan and protocol number.The identification information of error correction coding message flow can also be the payload type field of RTP header.
The embodiment of the present invention also provides a kind of encoder for correcting 10, and referring to Fig. 4, this encoder for correcting 10 comprises:
Frame type acquiring unit 11, for obtaining the frame type under the message content of media data message, described frame type comprises basic frame and predictive frame;
In embodiment of the present invention encoder for correcting 10, frame type acquiring unit 11 is by obtaining the frame type indication information from head end, comprise message content in this frame type indication information the sequence number of the media data message that is basic frame and the sequence number of the media data message that message content is predictive frame.Now, the encoder for correcting 10 in the embodiment of the present invention can be arranged in head end video coding system.
In addition, encoder for correcting embodiment 10 of the present invention can also use in transmission network, frame type acquiring unit 11 can judge the frame type under media data message content according to the marker marker bit in media data message, can also decode to the media data message receiving, by judging that the frame type of decoded media data obtains the frame type under media data message content.
The embodiment of the present invention also provides a kind of forwarding controller 20, and the schematic diagram of this device is referring to Fig. 5, and this forwarding controller 20 comprises:
Network performance acquiring unit 21, for obtaining the network performance of Access Network, network performance can comprise packet loss, delay, shake of Access Network etc.
Forward processing unit 22, for need the type of the error correction coding message flow forwarding according to the network performance judgement of Access Network, wherein the type of error correction coding message flow comprises that message content is the corresponding error correction coding message flow of media data message of basic frame and the corresponding error correction coding message flow of media data message that message content is predictive frame.
Mark acquiring unit 23, for obtaining the identification information that needs the error correction coding message flow forwarding;
Mark acquiring unit 23 obtains the identification information that needs the error correction coding message flow forwarding by the identification information of preserving in search index unit 25.
Apparatus of the present invention embodiment 20 can use in aforementioned transmission control method embodiment.
The embodiment of the present invention also provides a kind of system of error correction coding, and referring to Fig. 6, this error correction coding system comprises:
Encoder for correcting 10, for obtaining the frame type under the message content of media data message, described frame type comprises basic frame and predictive frame; The media datagrams literary grace that the media data message that is basic frame to message content is predictive frame with message content is carried out error correction coding by different redundancys, and the redundancy of the corresponding error correction coding of media data message that described message content is basic frame is greater than the redundancy that described message content is the corresponding error correction coding of media data message of predictive frame;
Forwarding controller 20, for need the type of the error correction coding message flow forwarding according to the network performance judgement of Access Network, issue the forward command of the identification information of the error correction coding message flow that comprises described needs forwarding, so that described Access Network is realized the forwarding to error correction coding message flow according to described identification information.
In error correction coding system embodiment of the present invention, encoder for correcting 10 is carrying out after error correction coding media data message, coding dispensing device 30 uses different error correction coding message flows to send to the error correction coding message of different redundancys, forwarding controller 20 needs the type of the error correction coding message flow forwarding according to the network performance judgement of Access Network, and issues the forward command of the identification information of the error correction coding message flow that comprises described needs forwarding.
Forwarding unit in access network, according to the forward command receiving, forwards corresponding error correction coding message flow.Due in the time issuing forward command, consider concrete access network environment, can forward rational error correction coding message flow for access network environment, thereby can save the Internet resources of access network.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode of software and necessary general hardware platform, based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise that some instructions (can be personal computers in order to make a computer equipment, server or the network equipment etc.) carry out the method described in the present invention each embodiment.
Above error correction/encoding method provided by the invention and device, transmission control method and device and error correction coding system are described in detail, encoder for correcting embodiment of the present invention can use in the coded system of head end, also can use in transmission network, the type of media data is not limited to video data, it can also be other media data, media data message includes but not limited to RTP message, can also be other message producing of encoding.It is to be noted, the present invention can also directly carry out error correction coding to media data, use the high error correction coding of redundancy to encode to the important frame in media data, use the low error correction coding of redundancy to encode to the non-important frame in media data, also can produce identical beneficial effect.For one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1. a transmission control method, is characterized in that, comprising:
Obtain the network performance of Access Network;
The type that needs the error correction coding message flow forwarding according to the network performance judgement of Access Network, the type of described error correction coding message flow comprises that message content is the corresponding error correction coding message flow of media data message of basic frame and the corresponding error correction coding message flow of media data message that message content is predictive frame;
Obtain the described identification information that needs the error correction coding message flow forwarding, issue the forward command that comprises described identification information, make described Access Network realize the forwarding to error correction coding message flow according to described identification information;
Wherein, the described judgement of the network performance according to Access Network needs the type of the error correction coding message flow forwarding to be specially:
In the time that the packet loss of Access Network is less than or equal to 1%, the corresponding error correction coding message flow of media data message that the content that E-Packets is basic frame; Otherwise, the corresponding error correction coding message flow of media data message that the corresponding error correction coding message flow of media data message that the content that E-Packets is basic frame and message content are predictive frame.
2. transmission control method according to claim 1, is characterized in that, the identification information of described error correction coding message flow is the payload type field of error correction coding header in error correction coding message flow or the five-tuple information of network data report.
3. transmission control method according to claim 1, is characterized in that, described in obtain and need the identification information of error correction coding message flow forwarding to be specially:
Inquiry error correction coding message flow concordance list, in described error correction coding message flow concordance list, comprising message content is the identification information of the corresponding error correction coding message flow of media data message and the identification information of the corresponding error correction coding message flow of media data message that message content is predictive frame of basic frame.
4. a forwarding controller, is characterized in that, comprising:
Network performance acquiring unit, for obtaining the network performance of Access Network;
Forward processing unit, for need the type of the error correction coding message flow forwarding according to the network performance judgement of Access Network, the type of described error correction coding message flow comprises that message content is the corresponding error correction coding message flow of media data message of basic frame and the corresponding error correction coding message flow of media data message that message content is predictive frame;
Mark acquiring unit, for obtaining the described identification information that needs the error correction coding message flow forwarding;
Order issues unit, for issuing the forward command of the identification information that comprises described error correction coding message flow;
Wherein, the described judgement of the network performance according to Access Network needs the type of the error correction coding message flow forwarding to be specially:
In the time that the packet loss of Access Network is less than or equal to 1%, the corresponding error correction coding message flow of media data message that the content that E-Packets is basic frame; Otherwise, the corresponding error correction coding message flow of media data message that the corresponding error correction coding message flow of media data message that the content that E-Packets is basic frame and message content are predictive frame.
5. forwarding controller according to claim 4, is characterized in that, also comprises:
Indexing units, for preserving the corresponding relation of the type of described error correction coding message flow and the identification information of described error correction coding message flow.
6. an error correction coding system, is characterized in that, comprising:
Encoder for correcting, for obtaining the frame type under the message content of media data message, described frame type comprises basic frame and predictive frame; The media datagrams literary grace that the media data message that is basic frame to message content is predictive frame with message content is carried out error correction coding by different redundancys, and the redundancy of the corresponding error correction coding of media data message that described message content is basic frame is greater than the redundancy that described message content is the corresponding error correction coding of media data message of predictive frame;
Coding dispensing device, uses different error correction coding message flows to send for the error correction coding of the different redundancys to after described encoder for correcting coding;
Forwarding controller, for need the type of the error correction coding message flow forwarding according to the network performance judgement of Access Network, issue the forward command of the identification information of the error correction coding message flow that comprises described needs forwarding, so that described Access Network is realized the forwarding to error correction coding message flow according to described identification information;
Wherein, the described judgement of the network performance according to Access Network needs the type of the error correction coding message flow forwarding to be specially:
In the time that the packet loss of Access Network is less than or equal to 1%, the corresponding error correction coding message flow of media data message that the content that E-Packets is basic frame; Otherwise, the corresponding error correction coding message flow of media data message that the corresponding error correction coding message flow of media data message that the content that E-Packets is basic frame and message content are predictive frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910132374.8A CN101854224B (en) | 2009-04-01 | 2009-04-01 | Error correcting coding method, device and system, and forwarding control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910132374.8A CN101854224B (en) | 2009-04-01 | 2009-04-01 | Error correcting coding method, device and system, and forwarding control method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101854224A CN101854224A (en) | 2010-10-06 |
| CN101854224B true CN101854224B (en) | 2014-06-04 |
Family
ID=42805512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910132374.8A Expired - Fee Related CN101854224B (en) | 2009-04-01 | 2009-04-01 | Error correcting coding method, device and system, and forwarding control method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101854224B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102143367B (en) * | 2010-01-30 | 2013-01-30 | 华为技术有限公司 | Method, device and system for checking error correction |
| CN103227925B (en) * | 2013-05-13 | 2016-05-11 | 深圳市云宙多媒体技术有限公司 | A kind of self adaptation B frame coding method and system |
| EP3352400B1 (en) * | 2015-09-17 | 2019-05-01 | Nec Corporation | Terminal device, control method therefor, and recording medium in which control program for terminal device is stored |
| CN112019852A (en) * | 2019-05-29 | 2020-12-01 | 杭州海康威视数字技术股份有限公司 | Target type frame identification method and device and electronic equipment |
| JP7269112B2 (en) * | 2019-06-26 | 2023-05-08 | 日本放送協会 | Receiving device and program |
| CN112333470B (en) * | 2020-10-27 | 2022-05-27 | 杭州叙简科技股份有限公司 | FEC (forward error correction) system based on video frame |
| CN112995214B (en) * | 2021-04-26 | 2021-08-10 | 安心智能(武汉)信息技术有限公司 | Real-time video transmission system, method and computer readable storage medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101072083A (en) * | 2007-06-04 | 2007-11-14 | 深圳市融合视讯科技有限公司 | Method for optimizing network data transmission redundancy error correction rate |
-
2009
- 2009-04-01 CN CN200910132374.8A patent/CN101854224B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101072083A (en) * | 2007-06-04 | 2007-11-14 | 深圳市融合视讯科技有限公司 | Method for optimizing network data transmission redundancy error correction rate |
Non-Patent Citations (2)
| Title |
|---|
| 基于Norros公式的自相似视频流评估技术;黎耀 等;《通信学报》;20050131;第213-216页 * |
| 黎耀 等.基于Norros公式的自相似视频流评估技术.《通信学报》.2005, |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101854224A (en) | 2010-10-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101854224B (en) | Error correcting coding method, device and system, and forwarding control method and device | |
| JP6553119B2 (en) | Packet transmitting / receiving apparatus and method in broadcasting and communication system | |
| TWI353134B (en) | A method to support forwoard error correction for | |
| CN101061659B (en) | Adaptive forward error correction method and device | |
| CN102143367B (en) | Method, device and system for checking error correction | |
| CN101636983B (en) | Reducing effects of packet loss in video transmissions | |
| CN110943800B (en) | Data packet sending method, device and system, storage medium and electronic device | |
| JP2019097203A (en) | Packet transmission method in communication system | |
| CN110224793B (en) | Self-adaptive FEC method based on media content | |
| KR102083302B1 (en) | FEC mechanism based on media content | |
| US10051266B2 (en) | Apparatus and method for transmitting and receiving hybrid packets in a broadcasting and communication system using error correction source blocks and MPEG media transport assets | |
| KR20150045346A (en) | Apparatus and method for transmitting and receiving multimedia data in mobile communication system | |
| CN1611027A (en) | Unequal error protection using forward error correction based on reed-Solomon codes | |
| CN111385055B (en) | Data transmission method and device | |
| Hussain et al. | Adaptive video-aware forward error correction code allocation for reliable video transmission | |
| CN104754341A (en) | Video data encoding and decoding method and device | |
| CN1197256C (en) | Telecommunicaltion system, transmitter, protecting transmission error method | |
| KR20130008438A (en) | Methods of controlling of forward error correction in multimedia packet transport network | |
| KR20100112151A (en) | Network card and information processor | |
| CN108702245B (en) | Adaptive application layer forward error correction for MPEG media transport | |
| CN109618164A (en) | A kind of video coding-decoding processing method | |
| CN111245566B (en) | Method and device for preventing packet loss of unreliable network, storage medium and electronic equipment | |
| JP2010034898A (en) | Data transmission apparatus and data transmission method | |
| Li et al. | Dante: Enabling fov-aware adaptive fec coding for 360-degree video streaming | |
| JP2008028767A (en) | Network card and information processor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170824 Address after: 201, room 1, building A, No. 518053, front Bay Road, Qianhai, Shenzhen Shenzhen cooperation zone, Guangdong, China Patentee after: Shenzhen Zhitong World Technology Service Co. Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: Huawei Technologies Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20200401 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |