CN109547467A - Media data error correction transmission and error correction method, device, equipment and storage medium - Google Patents
Media data error correction transmission and error correction method, device, equipment and storage medium Download PDFInfo
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- CN109547467A CN109547467A CN201811554337.1A CN201811554337A CN109547467A CN 109547467 A CN109547467 A CN 109547467A CN 201811554337 A CN201811554337 A CN 201811554337A CN 109547467 A CN109547467 A CN 109547467A
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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
- H04L65/80—Responding to QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
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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
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
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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
- H04L65/70—Media network packetisation
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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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- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The embodiment of the invention discloses a kind of media data error correction transmission and error correction method, device, equipment and storage medium, the media data error correction transmission method includes: to be grouped original media data packet in numerical order；For each grouping, the RTP media data packet that the original media data packet progress realtime transmission protocol RTP encapsulation process in the grouping generates the grouping is sent to purpose terminal, and each original media data packet is locally stored according to grouping；When determining whole original media datas coating storage in the grouping, whole original media data packets in the grouping are subjected to coded treatment, generate the redundancy packet of the grouping；The RTP redundancy packet that redundancy packet progress RTP encapsulation processing generates the grouping is sent to the purpose terminal.The technical solution of the embodiment of the present invention is able to ascend the laser propagation effect of real-time audio and video data business, to meet the transmission demand of real-time multimedia data business.
Description
Technical field
The present embodiments relate to audio video transmission technical field more particularly to a kind of media data error correction transmission and error correction
Method, apparatus, equipment and storage medium.
Background technique
With the continuous development of network technology and multimedia service, multimedia communication service is gradually in Internet application
Occupy leading position.
The existing transmission layered scheme for carrying out the use of audio-video real-time interactive on internet has TCP
(Transmission Control Protocol, transmission control protocol) and UDP (User Datagram Protocol, user
Datagram protocol) two kinds.Transmission Control Protocol can transmit for the data between two endpoints and provide relatively reliable guarantee.When data are transmitted to
When recipient, recipient will check the correctness of data.Under the correctness approval that sender is only connected to recipient could be sent
One data block.If being not connected to confirmation message, this data block needs to retransmit.Although the data transmission mechanism based on TCP
For transmission data very rationally, but the mechanism can cause delay etc. when Internet transmits real-time audio and video data
Problems lose the meaning of real-time intercommunication.UDP can provide higher handling capacity and lower delay compared with TCP, very suitable
Close the audio-video-interactive occasion of low delay.
Inventor in the implementation of the present invention, discovery the prior art have following defects that UDP performance raising be with
It can not ensure that data integrity is cost, therefore it cannot tender guarantee to passed data, easily because network congestion, grouping are super
When lose or the phenomenon that situations such as transmission impairment leads to media data packet loss, be unable to satisfy the biography of real-time multimedia data business
Defeated demand.
Summary of the invention
The embodiment of the present invention provides a kind of media data error correction transmission and error correction method, device, equipment and storage medium, with
The laser propagation effect for promoting real-time audio and video data business, to meet the transmission demand of real-time multimedia data business.
In a first aspect, the embodiment of the invention provides a kind of media data error correction transmission methods, comprising:
Original media data packet is grouped in numerical order；
For each grouping, it is raw that the original media data packet in the grouping is subjected to realtime transmission protocol RTP encapsulation process
It is sent to purpose terminal at the RTP media data packet of the grouping, and each original media data packet is carried out this according to grouping
Ground storage；
When determining whole original media datas coating storage in the grouping, by whole original media numbers in the grouping
Coded treatment is carried out according to packet, generates the redundancy packet of the grouping；
The RTP redundancy packet that redundancy packet progress RTP encapsulation processing generates the grouping is sent to the purpose terminal.
Second aspect, the embodiment of the invention also provides a kind of media data error correction methods, comprising:
The RTP media data packet being respectively grouped and RTP redundancy packet that encoding terminal is sent are received, and is carried out at RTP deblocking
Reason, the whole for obtaining each grouping have received original media data packet and redundancy packet；Wherein, the RTP redundancy packet is according to one
After whole original media data packet encoders in a grouping, carries out RTP encapsulation processing and generate；
For each grouping, if it is determined that do not receive any original media data packet in the grouping, then according to this point
Original media data packet and redundancy packet all have been received in group, has recovered the original media data not received in the grouping
Packet.
The third aspect, the embodiment of the invention also provides a kind of media data error correction transmission devices, comprising:
Data packet grouping module, for original media data packet to be grouped in numerical order；
Packet sending module, for for each grouping, the original media data packet in the grouping to be carried out RTP encapsulation
The RTP media data packet that processing generates the grouping is sent to purpose terminal, and by each original media data packet according to grouping
It is locally stored；
Redundancy packet generation module, for determine in the grouping whole original media datas coating storage when, by this point
Whole original media data packets in group carry out coded treatment, generate the redundancy packet of the grouping；
Redundancy packet sending module, for the redundancy packet to be carried out the RTP redundancy packet hair that RTP encapsulation processing generates the grouping
It send to the purpose terminal.
Fourth aspect, the embodiment of the invention also provides a kind of media data error correction devices, comprising:
Packet-receiving module, for receiving the RTP media data packet being respectively grouped and RTP redundancy of encoding terminal transmission
Packet, and RTP deblocking processing is carried out, the whole for obtaining each grouping has received original media data packet and redundancy packet；Wherein, described
RTP redundancy packet is to carry out RTP encapsulation according to after whole original media data packet encoders in a grouping and handle generation；
Data packet recovery module, for for each grouping, if it is determined that do not receive any original matchmaker in the grouping
Volume data packet is recovered and is not connect in the grouping then according to all original media data packet and redundancy packet has been received in the grouping
The original media data packet received.
5th aspect, the embodiment of the invention also provides a kind of computer equipment, the computer equipment includes:
One or more processors；
Storage device, for storing one or more programs；
When one or more of programs are executed by one or more of processors, so that one or more of processing
Device realizes any media data error correction transmission method in first aspect.
6th aspect, the embodiment of the invention also provides a kind of computer storage mediums, are stored thereon with computer program,
Any media data error correction transmission method in first aspect is realized when the program is executed by processor.
7th aspect, the embodiment of the invention also provides a kind of computer equipment, the computer equipment includes:
One or more processors；
Storage device, for storing one or more programs；
When one or more of programs are executed by one or more of processors, so that one or more of processing
Device realizes any media data error correction method in second aspect.
Eighth aspect, the embodiment of the invention also provides a kind of computer storage mediums, are stored thereon with computer program,
Any media data error correction method in second aspect is realized when the program is executed by processor.
It, will for each grouping after the embodiment of the present invention is by the way that original media data packet to be grouped in numerical order
The RTP media data packet that original media data packet progress RTP encapsulation processing in the grouping generates the grouping is sent to purpose end
End, and each original media data packet is locally stored according to grouping.Determining whole original media datas in the grouping
When coating storage, whole original media data packets in the grouping are subjected to coded treatment, to generate corresponding with the grouping
Redundancy packet, and redundancy packet is subjected to RTP encapsulation processing generation RTP redundancy packet and is sent to purpose terminal.Purpose terminal receives respectively
The RTP media data packet and RTP redundancy packet of grouping simultaneously carry out RTP deblocking processing, obtain each grouping whole received it is original
Media data packet and redundancy packet, for each grouping, if purpose terminal determine do not receive it is any original in the grouping
Media data packet recovers in the grouping not then according to all original media data packet and redundancy packet has been received in the grouping
The original media data packet received solves the problems, such as that existing multimedia data service transmission quality is unable to satisfy transmission demand,
The laser propagation effect for promoting real-time audio and video data business is realized, to meet the transmission demand of real-time multimedia data business.
Detailed description of the invention
Fig. 1 a is a kind of flow chart for media data error correction transmission method that the embodiment of the present invention one provides；
Fig. 1 b is a kind of schematic diagram for IP datagram structure that the embodiment of the present invention one provides；
Fig. 1 c is a kind of schematic diagram for standard RTP data structure that the embodiment of the present invention one provides；
Fig. 1 d is the schematic diagram of the RTP data structure after a kind of optimization that the embodiment of the present invention one provides；
Fig. 1 e is a kind of schematic diagram for transmission original media data packet that the embodiment of the present invention one provides；
Data packet group is at structural schematic diagram in a kind of transmission group that Fig. 1 f provides for the embodiment of the present invention one；
Fig. 2 a is a kind of flow chart of media data error correction method provided by Embodiment 2 of the present invention；
Fig. 2 b is a kind of receiving media data packet provided by Embodiment 2 of the present invention and exports to the signal of upper layer application
Figure；
Fig. 2 c is that the whole flow process of transmission, reception and the error correction of a kind of audio, video data provided by Embodiment 2 of the present invention is shown
It is intended to；
Fig. 2 d is the original media data packet schematic diagram in a kind of grouping provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of schematic diagram for media data error correction transmission device that the embodiment of the present invention three provides；
Fig. 4 is a kind of schematic diagram for media data error correction device that the embodiment of the present invention four provides；
Fig. 5 is a kind of structural schematic diagram for computer equipment that the embodiment of the present invention five provides.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.
It also should be noted that only the parts related to the present invention are shown for ease of description, in attached drawing rather than
Full content.It should be mentioned that some exemplary embodiments are described before exemplary embodiment is discussed in greater detail
At the processing or method described as flow chart.Although operations (or step) are described as the processing of sequence by flow chart,
It is that many of these operations can be implemented concurrently, concomitantly or simultaneously.In addition, the sequence of operations can be by again
It arranges.The processing can be terminated when its operations are completed, it is also possible to have the additional step being not included in attached drawing.
The processing can correspond to method, function, regulation, subroutine, subprogram etc..
Embodiment one
Fig. 1 a is a kind of flow chart for media data error correction transmission method that the embodiment of the present invention one provides, and the present embodiment can
The case where suitable for media data is grouped transmission, this method can be executed by media data error correction transmission device, should
Device can be realized by the mode of software and/or hardware, and can generally be integrated in computer equipment (typical encoding terminal etc.
Computer equipment) in, it is used cooperatively with the decoding terminal of media data packet.Correspondingly, as shown in Figure 1a, this method includes as follows
Operation:
S110, original media data packet is grouped in numerical order.
Wherein, original media data packet can be to be sent, the audio-video frequency media data packet of un-encapsulated processing.
In embodiments of the present invention, it when handling media data traffic, can be sent in batches as unit of group, each
Grouping may include the original media data packet of identical quantity arranged in numerical order.Wherein, number order can be original
The genesis sequence of media data packet.Illustratively, it is assumed that include 8 original media data packets, number order in a grouping
It can be respectively p1, p2, p3, p4, p5, p6, p7 and p8.
In an alternate embodiment of the present invention where, before being grouped original media data packet in numerical order,
It can also include: to RTP (the Real-time Transport for including in the corresponding datagram of the original media data packet
Protocol, real-time transport protocol) the setting byte of header in data structure deleted.
Wherein, setting byte of header can be the partial bytes for not influencing Data Transmission Content in RTP data structure.
In embodiments of the present invention, the network transmission of audio, video data can be carried out using udp protocol.Fig. 1 b is the present invention
A kind of schematic diagram for IP datagram structure that embodiment one provides.Fig. 1 c is a kind of standard RTP that the embodiment of the present invention one provides
The schematic diagram of data structure.As shown in fig. 1b and fig. lc, may include in the IP datagram with udp protocol transmission RTP data packet
IP stem, UDP stem, RTP stem and RTP data portion etc..Wherein, the content regions of UDP datagram are RTP in IP datagram
Audio/video flow.RTP stem and the composition RTP grouping of RTP data portion.It may include version, filling mark in RTP grouping
(P), extension header mark (X), participation source number, flag bit (M), RTP load format (PT), PT Payload Type, serial number
(squence number), timestamp, synchronous source identifier (SSRC), contributing source identifier (CSRC) and payload
Payload etc..
It, can also be to original media data in order to reduce the transmission pressure of network before being transmitted to media data
The setting byte of header wrapped in the RTP data structure for including in corresponding datagram is deleted.Fig. 1 d is the embodiment of the present invention
The schematic diagram of RTP data structure after a kind of one optimization provided in embodiments of the present invention, can be deleted as shown in Figure 1 d
CSRC identifier portion directly accesses the original media data packet content of Payload after conventional RTP frame head.
In an alternate embodiment of the present invention where, original media data packet is grouped in numerical order, is can wrap
It includes: if it is determined that of length no more than given threshold of the original media data packet, then directly by the original media data packet
As the data packet to be sent in grouping；Otherwise, by the original media data packet according to the corresponding data of the given threshold
The position of packet length is truncated, formed two new data packets, and using described two new data packets as be grouped in
Send data packet.
Wherein, given threshold can be the data packet length threshold value being arranged according to actual needs, such as 1157bytes, this
Inventive embodiments are not defined the specific value of given threshold.
In embodiments of the present invention, one length threshold can be set for the length of original media data packet, such as
1157bytes.If it is determined that of length no more than 1157bytes of original media data packet, then it can be directly by original media number
According to packet as the data packet to be sent in grouping.It, can will be former if the length of original media data packet has been more than 1157bytes
Beginning media data packet is truncated automatically from the position of the corresponding data packet length of 1157bytes, forms two new data packets.
The length of one of data packet is 1157bytes in new data packet, and the length of another data packet is then original media number
According to the length of packet and the difference of 1157bytes.
S120, for each grouping, the original media data packet in the grouping is subjected to RTP encapsulation processing and generates the grouping
RTP media data packet be sent to purpose terminal, and each original media data packet is locally stored according to grouping.
Wherein, RTP media data packet can be original media data packet and be formed by data packet after RTP encapsulation is handled.
Correspondingly, when outer layer is passed to original media data packet, it can in packetized units, by the original media in grouping
Data packet carries out successively being sent to purpose terminal after RTP encapsulation processing generates RTP media data packet, while by each original media number
It is locally stored according to packet according to grouping.
S130, determine in the grouping whole original media datas coating storage when, the whole in the grouping is original
Media data packet carries out coded treatment, generates the redundancy packet of the grouping.
In embodiments of the present invention, it after the last one original media data packet in grouping is sent, is deposited to local
The original media data packet of the grouping of storage carries out coded treatment, to generate redundancy packet corresponding with the grouping.Specifically, coding
Processing can use FEC (Forward Error Correction, forward error correction) coding method.
S140, the RTP redundancy packet that redundancy packet progress RTP encapsulation processing generates the grouping is sent to the purpose end
End.
Wherein, RTP redundancy packet can be redundancy packet and be formed by data packet after RTP encapsulation is handled.
Correspondingly, redundancy packet can equally be carried out to RTP encapsulation processing and generated after generating redundancy packet corresponding with grouping
RTP redundancy packet is sent to purpose terminal.That is, including a certain number of original media numbers when one in embodiments of the present invention
After being sent according to the grouping of packet, the corresponding RTP redundancy packet of the grouping and then is sent to purpose terminal, is then proceeded at circulation
Manage the original media data packet of next grouping and the encapsulation and transmission of redundancy packet.It should be noted that one can be grouped
Original media data packet and corresponding redundancy packet as a transmission group.Correspondingly, the audio-video number in the embodiment of the present invention
It can be the original media data packet for being passed to outer layer as unit of transmission group according to transmission process to cycle through, until all
Original media data packet be sent.
Fig. 1 e is a kind of schematic diagram for transmission original media data packet that the embodiment of the present invention one provides.As shown in fig. le,
P1~p8 is original media data packet, and R represents redundancy packet.I.e. a transmission group has 8 original media data packets and 1 redundancy packet
Composition.When outer layer is passed to original media data packet p, issued after carrying out RTP encapsulation, while being stored in inside modules queue.Work as hair
Send the last one original media data packet p8 of group when being sent, to original media data packet p1~p8 of queue for storing into
Row FEC coding generates redundancy packet R, and carries out RTP to redundancy packet R and transmit.So circulation, until it is original to handle all inputs
Media data packet.Data packet group is at structural schematic diagram in a kind of transmission group that Fig. 1 f provides for the embodiment of the present invention one.Such as Fig. 1 f
Shown, by taking the data packet of coding and decoding video agreement H.265 as an example, (type is for every 8 packet original media data packet and 1 redundancy packet
It PT=DynamicRTP-Type-111) is one group of transmission group data, each data packet, maximum length, which is arranged, is
1157bytes.It is automatic to be truncated if the length of an original media data packet is more than 1157bytes, form new packet.It cuts
It is True that the tail packet having no progeny, which can mark Marker (| M |) position,.In original media data packet, the length of not each packet is
Fixed value, data portion can be at most 1103 bytes, can specifically set according to actual needs, the embodiment of the present invention is to this
And it is not limited.
After the technical solution of the embodiment of the present invention is by the way that original media data packet to be grouped in numerical order, for every
Original media data packet in the grouping is carried out the RTP media data packet transmission that RTP encapsulation processing generates the grouping by a grouping
To purpose terminal, and each original media data packet is locally stored according to grouping.Determining that the whole in the grouping is original
When media data coating storage, whole original media data packets in the grouping are subjected to coded treatment, to generate and this point
The corresponding redundancy packet of group, and redundancy packet is subjected to RTP encapsulation processing generation RTP redundancy packet and is sent to purpose terminal, it solves existing
The problem of multimedia data service transmission quality is unable to satisfy transmission demand realizes the transmission for promoting real-time audio and video data business
Effect, to meet the transmission demand of real-time multimedia data business.
Embodiment two
Fig. 2 a is a kind of flow chart of media data error correction method provided by Embodiment 2 of the present invention, and the present embodiment is applicable
In to received grouping media data carry out error correction the case where, this method can be executed by media data error correction device, the dress
Setting can be realized by the mode of software and/or hardware, and can generally be integrated in the computer equipment (meter such as typical decoding terminal
Calculate machine equipment) in, it is used cooperatively with the encoding terminal of media data packet.Correspondingly, as shown in Figure 2 a, this method includes following behaviour
Make:
S210, the RTP media data packet being respectively grouped and RTP redundancy packet that encoding terminal is sent are received, and carries out RTP solution
Envelope processing, the whole for obtaining each grouping have received original media data packet and redundancy packet；Wherein, the RTP redundancy packet is root
After whole original media data packet encoders in a grouping, carries out RTP encapsulation processing and generate.
In embodiments of the present invention, the RTP media data packet an of grouping and the hair of RTP redundancy packet are completed when encoding terminal
After sending, terminal can receive the RTP media data packet and RTP redundancy packet of the grouping to decoding terminal as a purpose, and to its into
Row RTP deblocking processing has received original media data packet and redundancy packet with the whole for obtaining each grouping.
S220, for each grouping, if it is determined that do not receive any original media data packet in the grouping, then basis
Original media data packet and redundancy packet all have been received in the grouping, has recovered the original media number not received in the grouping
According to packet.
Correspondingly, if decoding terminal determines all original media numbers in grouping according to the number of original media data packet
It does not lose, then can directly export by number to application layer according to packet.If determined not according to the number of original media data packet
Receive any original media data packet in the grouping, then according in the grouping all received original media data packet and
Redundancy packet recovers the original media data packet not received in the grouping.
In an alternate embodiment of the present invention where, according to all having received original media data packet and superfluous in the grouping
Remaining packet recovers the original media data packet not received in the grouping, may include: to have received original matchmaker according to the whole
Volume data packet generates error correction redundancy packet；It is recovered according to the redundancy packet and the error correction redundancy packet and not to be received in the grouping
Original media data packet.
Wherein, error correction redundancy packet can be generates according to after the original media data packet progress FEC coded treatment received
Redundancy packet.
Specifically, decoding terminal can be corresponding to original media data progress FEC coded treatment generation has all been received
Error correction redundancy packet.Decoding terminal can recover in the grouping not according to the error correction redundancy packet of generation and the redundancy packet received
The original media data packet received.
Fig. 2 b is a kind of receiving media data packet provided by Embodiment 2 of the present invention and exports to the signal of upper layer application
Figure.In a specific example, as shown in Figure 2 b, when decoding terminal receives p1, p2 and p3 original media number in grouping
When according to packet, because number is continuous, there is not packet loss, application layer can be directly output to, while caching portion in local convection current,
So that subsequent possible fec decoder uses (subsequent is grouped interior original media data Bao Ruowu packet loss, then data cached to empty).
When receiving p5 original media data packet, it can judge that p4 original media data packet goes out active according to number, stop at this time
The output of this grouping original media data packet, and p5 original media data packet is stored in local queue.It should be noted that into
Before row FEC error correction restores, QoS (Quality of Service, service quality) is generally first needed to solve packet random ordering and repeat
Problem, then carry out FEC error correction recovery.In embodiments of the present invention, decoding terminal receives original media data packet and refers to
Data packet after solving to wrap out-of-order and replication problem by QoS, therefore there is no packet random ordering and repeat situation.When receive p6,
P7 and p8 original media data packet, until meeting the condition of loss recovery: the original media number received when receiving R redundancy packet
The original media data packet number being grouped according to the sum of packet number and the number of redundant packets received equal to one.Encoding terminal can be to receiving
P1, p2, p3, p5, p6, p7, p8 and R data packet carry out fec decoder processing, obtain p4 original media data packet.Because for it
It is preceding to have exported p1~p3 media data packet, at this point, need to only export p4~p8 original media data packet.It should be noted that such as
The original media packet number that the original media data packet number that fruit receives is grouped plus number of redundant packets less than one shows the original in grouping
Beginning media data packet loss at least two, then the packet loss problem in this grouping can not solve, and can directly export in numerical order
The media data packet received.Since the transmission of original media data packet is carried out in the embodiment of the present invention in packetized units and is connect
It receives, it is generally the case that the original media data packet in grouping can at most lose one.It is very poor in the communication quality of communication network
In the case of, the original media data packet in grouping is possible to lose 2 or more.Therefore, provided by the embodiment of the present invention
Audio, video data error correction method can effectively solve the problem that packet loss problem, and meet the data transfer demands in low broadband simultaneously.
In an alternate embodiment of the present invention where, which is recovered according to the redundancy packet and the error correction redundancy packet
In the original media data packet that does not receive, may include: that the redundancy packet and the error correction redundancy packet are done into subtraction process, obtain
The expression formula for the original media data packet not received into the grouping；According to predetermined linear Algebraic Algorithm to not connect in the grouping
The expression formula of the original media data packet received is solved, and the original media data packet not received in the grouping is obtained；Its
In, the redundancy packet is generated by media data packet and the product of one-dimensional coefficient vector matrix.
Wherein, predetermined linear Algebraic Algorithm can be the algorithm solved to system of linear equations and matrix.In the present invention
In embodiment, optionally, predetermined linear Algebraic Algorithm can use gauss elimination method.
In embodiments of the present invention, redundancy packet can be calculated by media data packet and one-dimensional coefficient vector matrix.Tool
Body, redundancy packet and error correction redundancy packet can be done into subtraction process, the original media number not received in the grouping can be obtained
According to the expression formula of packet.Then expression formula is solved using gauss elimination method, the original not received in the grouping can be obtained
Beginning media data packet.
In a specific example, it is assumed that defining the original media data packet P in a grouping is 8 packets: P=[p1 p2
p3 p4 p5 p6 p7 p8], coefficient vector F can use one-dimensional coefficient matrix: F=[a1 a2 a3 a4 a5 a6 a7 a8].Root
According to coefficient vector, redundancy packet can be calculated are as follows: R=FP.That is:Encoding terminal is just
The original media data packet and redundancy packet of the grouping can successively be sent.When decoding terminal receives all original matchmakers of the grouping
Volume data packet p1~p8 is then directly exported in numerical order to application layer without loss.If original media number in the way sent
It is lost according to packet p4, then decoding terminal can restore the original media data lost according to the original media data packet received
Packet.Detailed process is as follows: error correction redundancy packet is generated by the original media data packet received again: By itself and the redundancy that receives
Packet compares, the expression formula for the original media data packet p4 that can be lost: r=R-R0=a4p4.Next it can use height
This null method finds out p4.To obtain all original media data packet P (p1~p8) of the grouping, then continue in numerical order defeated
P4~p8 out.
Fig. 2 c is that the whole flow process of transmission, reception and the error correction of a kind of audio, video data provided by Embodiment 2 of the present invention is shown
It is intended to.Illustratively, as shown in Figure 2 c, transmitting terminal (i.e. encoding terminal) audio/video encoder carries out audio/video data
Compressed shape is at audio/video compression bag data as original media data packet.One point is formed according to k original media data packet
The original media data packet of group, and carry out FEC coding to it and generate corresponding redundant data packets, and to the original media number of grouping
It is sent according to after packet and redundancy packet progress RTP encapsulation by UDP network.Receiving end (i.e. decoding terminal) carries out after receiving data packet
RTP deblocking can carry out FEC according to the original media data packet and redundancy packet received when confirmation has the data lost
Decoding, to restore the original media data packet lost.Finally by complete one be grouped original media data packet by audio/
Video Decoder unzips it processing.
Fig. 2 d is the original media data packet schematic diagram in a kind of grouping provided by Embodiment 2 of the present invention.Of the invention real
It applies in example, the grouping transmission that packets headers realize media data packet can be expanded on RTP or proprietary protocol head.Such as Fig. 2 d institute
Show, each grouping is a complete independent FEC processing unit, non-correlation between different grouping.One grouping has k
Original media data packet, (k original media data packet and r redundancy packet can also be formed into a grouping), the k original matchmakers
Volume data packet possesses different numbers in grouping, may determine that the loss feelings of data packet this group Nei by the continuity of number
Condition, so that selectivity is restored.It is not necessarily to restore if redundancy packet goes out active.Because udp protocol has ensured number in packet
According to correctness, so without consider wrap in error correction the case where.Due to the presence of redundancy, any k number evidence in a grouping
Packet (including k-1 original media data packet and a redundancy packet) can be used to rebuild k original media data packet, if lost
Original media data packet number be less than or equal to r, decoding terminal receives after arbitrary k number is according to packet in a grouping, it can logical
It crosses number information to determine the relative position of lost package and carry out fec decoder, to restore k original media data packet.In the present invention
In embodiment, the ratio for defining number of redundant packets r and original media data packet number k is FEC coding redundancy degree r/k, and redundancy is higher,
Anti-packet loss ability is stronger, but simultaneous transmission efficiency is also lower.Therefore, in order to adapt in multiple network environment and consider low bandwidth feelings
Condition, optionally, defining original media data packet number in grouping group is k=8, can be generated r=1 according to original media data packet
Redundancy packet.
When the embodiment of the present invention is not by receiving any original media data packet in grouping in determination, according to the grouping
Middle whole has received original media data packet and redundancy packet, recovers the original media data packet not received in the grouping,
It solves the problems, such as that existing multimedia data service transmission quality is unable to satisfy transmission demand, realizes and promote real-time audio and video data industry
The laser propagation effect of business, to meet the transmission demand of real-time multimedia data business.
Embodiment three
Fig. 3 is a kind of schematic diagram for media data error correction transmission device that the embodiment of the present invention three provides, as shown in figure 3,
Described device includes: data packet grouping module 310, packet sending module 320, redundancy packet generation module 330 and redundancy packet
Sending module 340, in which:
Data packet grouping module 310, for original media data packet to be grouped in numerical order；
Packet sending module 320, for for each grouping, the original media data packet in the grouping to be carried out RTP
The RTP media data packet that encapsulation process generates the grouping is sent to purpose terminal, and by each original media data packet according to
Grouping is locally stored；
Redundancy packet generation module 330, for determine in the grouping whole original media datas coating storage when, by this
Whole original media data packets in grouping carry out coded treatment, generate the redundancy packet of the grouping；
Redundancy packet sending module 340, for the redundancy packet to be carried out the RTP redundancy that RTP encapsulation processing generates the grouping
Packet is sent to the purpose terminal.
After the technical solution of the embodiment of the present invention is by the way that original media data packet to be grouped in numerical order, for every
Original media data packet in the grouping is carried out the RTP media data packet transmission that RTP encapsulation processing generates the grouping by a grouping
To purpose terminal, and each original media data packet is locally stored according to grouping.Determining that the whole in the grouping is original
When media data coating storage, whole original media data packets in the grouping are subjected to coded treatment, to generate and this point
The corresponding redundancy packet of group, and redundancy packet is subjected to RTP encapsulation processing generation RTP redundancy packet and is sent to purpose terminal, it solves existing
The problem of multimedia data service transmission quality is unable to satisfy transmission demand realizes the transmission for promoting real-time audio and video data business
Effect, to meet the transmission demand of real-time multimedia data business.
Optionally, described device further include: byte of header deletes module, for corresponding to the original media data packet
The setting byte of header in RTP data structure for including in datagram is deleted.
Optionally, data packet grouping module 310, specifically for if it is determined that the length of the original media data packet does not surpass
Given threshold is crossed, then directly using the original media data packet as the data packet to be sent in grouping；It otherwise, will be described original
Media data packet is truncated according to the position of the corresponding data packet length of the given threshold, forms two new data packets,
And using described two new data packets as the data packet to be sent in grouping.
Above-mentioned media data error correction transmission device can be performed media data error correction provided by any embodiment of the invention and pass
Transmission method has the corresponding functional module of execution method and beneficial effect.The not technical detail of detailed description in the present embodiment,
It can be found in the media data error correction transmission method that any embodiment of that present invention provides.
Example IV
Fig. 4 is a kind of schematic diagram for media data error correction device that the embodiment of the present invention four provides, as shown in figure 4, described
Device includes: packet-receiving module 410 and data packet recovery module 420, in which:
Packet-receiving module 410, for receiving the RTP media data packet being respectively grouped and RTP of encoding terminal transmission
Redundancy packet, and RTP deblocking processing is carried out, the whole for obtaining each grouping has received original media data packet and redundancy packet；Wherein,
The RTP redundancy packet is to carry out RTP encapsulation according to after whole original media data packet encoders in a grouping and handle generation；
Data packet recovery module 420, for for each grouping, if it is determined that do not receive any original in the grouping
Media data packet recovers in the grouping not then according to all original media data packet and redundancy packet has been received in the grouping
The original media data packet received.
When the embodiment of the present invention is not by receiving any original media data packet in grouping in determination, according to the grouping
Middle whole has received original media data packet and redundancy packet, recovers the original media data packet not received in the grouping,
It solves the problems, such as that existing multimedia data service transmission quality is unable to satisfy transmission demand, realizes and promote real-time audio and video data industry
The laser propagation effect of business, to meet the transmission demand of real-time multimedia data business.
Optionally, data packet recovery module 420, comprising: error correction redundancy packet generation unit, for having been connect according to the whole
It receives original media data packet and generates error correction redundancy packet；Media data packet recovery unit, for being entangled according to the redundancy packet with described
Wrong redundancy packet recovers the original media data packet not received in the grouping.
Optionally, media data packet recovery unit, specifically for the redundancy packet and the error correction redundancy packet are done subtraction
Processing, obtains the expression formula of original media data packet not received in the grouping；According to predetermined linear Algebraic Algorithm to this point
The expression formula for the original media data packet not received in group is solved, and the original media number not received in the grouping is obtained
According to packet；Wherein, the redundancy packet is generated by media data packet and the product of one-dimensional coefficient vector matrix.
Media data error correction method provided by any embodiment of the invention can be performed in above-mentioned media data error correction device, tool
The standby corresponding functional module of execution method and beneficial effect.The not technical detail of detailed description in the present embodiment, reference can be made to this
The media data error correction method that invention any embodiment provides.
Embodiment five
Fig. 5 is a kind of structural schematic diagram for computer equipment that the embodiment of the present invention five provides.Fig. 5, which is shown, to be suitable for being used to
Realize the block diagram of the computer equipment 512 of embodiment of the present invention.The computer equipment 512 that Fig. 5 is shown is only an example,
Should not function to the embodiment of the present invention and use scope bring any restrictions.Equipment 512 typically undertakes encoding terminal function
The calculating equipment of energy.
As shown in figure 5, computer equipment 512 is showed in the form of universal computing device.The component of computer equipment 512 can
To include but is not limited to: one or more processor 516, storage device 528 connect different system components (including storage dress
Set 528 and processor 516) bus 518.
Bus 518 indicates one of a few class bus structures or a variety of, including memory bus or Memory Controller,
Peripheral bus, graphics acceleration port, processor or the local bus using any bus structures in a variety of bus structures.It lifts
For example, these architectures include but is not limited to industry standard architecture (Industry Standard
Architecture, ISA) bus, microchannel architecture (Micro Channel Architecture, MCA) bus, enhancing
Type isa bus, Video Electronics Standards Association (Video Electronics Standards Association, VESA) local
Bus and peripheral component interconnection (Peripheral Component Interconnect, PCI) bus.
Computer equipment 512 typically comprises a variety of computer system readable media.These media can be it is any can
The usable medium accessed by computer equipment 512, including volatile and non-volatile media, moveable and immovable Jie
Matter.
Storage device 528 may include the computer system readable media of form of volatile memory, such as arbitrary access
Memory (Random Access Memory, RAM) 530 and/or cache memory 532.Computer equipment 512 can be into
One step includes other removable/nonremovable, volatile/non-volatile computer system storage mediums.Only as an example, it deposits
Storage system 534 can be used for reading and writing immovable, non-volatile magnetic media, and (Fig. 5 do not show, commonly referred to as " hard drive
Device ").Although being not shown in Fig. 5, the disk for reading and writing to removable non-volatile magnetic disk (such as " floppy disk ") can be provided and driven
Dynamic device, and to removable anonvolatile optical disk (such as CD-ROM (Compact Disc-Read Only Memory, CD-
ROM), digital video disk (Digital Video Disc-Read Only Memory, DVD-ROM) or other optical mediums) read-write
CD drive.In these cases, each driver can pass through one or more data media interfaces and bus 518
It is connected.Storage device 528 may include at least one program product, which has one group of (for example, at least one) program
Module, these program modules are configured to perform the function of various embodiments of the present invention.
Program 536 with one group of (at least one) program module 526, can store in such as storage device 528, this
The program module 526 of sample includes but is not limited to operating system, one or more application program, other program modules and program
It may include the realization of network environment in data, each of these examples or certain combination.Program module 526 usually executes
Function and/or method in embodiment described in the invention.
Computer equipment 512 can also with one or more external equipments 514 (such as keyboard, sensing equipment, camera,
Display 524 etc.) communication, the equipment interacted with the computer equipment 512 communication can be also enabled a user to one or more,
And/or with any equipment (such as net that the computer equipment 512 is communicated with one or more of the other calculating equipment
Card, modem etc.) communication.This communication can be carried out by input/output (I/O) interface 522.Also, computer
Equipment 512 can also pass through network adapter 520 and one or more network (such as local area network (Local Area
Network, LAN), wide area network Wide Area Network, WAN) and/or public network, such as internet) communication.As schemed
Show, network adapter 520 is communicated by bus 518 with other modules of computer equipment 512.Although should be understood that in figure not
It shows, other hardware and/or software module can be used in conjunction with computer equipment 512, including but not limited to: microcode, equipment
Driver, redundant processing unit, external disk drive array, disk array (Redundant Arrays of Independent
Disks, RAID) system, tape drive and data backup storage system etc..
The program that processor 516 is stored in storage device 528 by operation, thereby executing various function application and number
According to processing, such as realize media data error correction transmission method provided by the above embodiment of the present invention.
That is, the processing unit is realized when executing described program: original media data packet is divided in numerical order
Group；For each grouping, the original media data packet in the grouping is subjected to realtime transmission protocol RTP encapsulation process and generates this point
The RTP media data packet of group is sent to purpose terminal, and each original media data packet is locally stored according to grouping；
When determining whole original media datas coating storage in the grouping, whole original media data packets in the grouping are carried out
Coded treatment generates the redundancy packet of the grouping；The redundancy packet is subjected to the RTP redundancy packet that RTP encapsulation processing generates the grouping
It is sent to the purpose terminal.
Embodiment six
The present embodiment is sixth is that provided in an embodiment of the present invention a kind of for executing media provided by the embodiment of the present invention two
The equipment of data error-correcting method, the equipment include: one or more processors；Storage device, for storing one or more journeys
Sequence；When one or more of programs are executed by one or more of processors, so that one or more of processors are real
The existing media data error correction transmission method as provided by the embodiment of the present invention two: the RTP being respectively grouped that encoding terminal is sent is received
Media data packet and RTP redundancy packet, and RTP deblocking processing is carried out, the whole for obtaining each grouping has received original media data
Packet and redundancy packet；Wherein, the RTP redundancy packet be according to one grouping in whole original media data packet encoders after, into
The processing of row RTP encapsulation generates；For each grouping, if it is determined that any original media data packet in the grouping is not received,
Then according in the grouping all received original media data packet and redundancy packet, recover do not received in the grouping it is original
Media data packet is suitable as decoding terminal.Its specific structure and detail content can refer to Fig. 5 and embodiment five.
Embodiment seven
The embodiment of the present invention seven also provides a kind of computer storage medium for storing computer program, the computer program
When being executed by computer processor for executing any media data error correction transmission method of the above embodiment of the present invention:
Original media data packet is grouped in numerical order；For each grouping, by the original media data packet in the grouping into
The RTP media data packet that row realtime transmission protocol RTP encapsulation process generates the grouping is sent to purpose terminal, and by each original
Beginning media data packet is locally stored according to grouping；When determining whole original media datas coating storage in the grouping,
Whole original media data packets in the grouping are subjected to coded treatment, generate the redundancy packet of the grouping；By the redundancy packet into
The RTP redundancy packet that the processing of row RTP encapsulation generates the grouping is sent to the purpose terminal.
The computer storage medium of the embodiment of the present invention, can be using any of one or more computer-readable media
Combination.Computer-readable medium can be computer-readable signal media or computer readable storage medium.It is computer-readable
Storage medium for example may be-but not limited to-the system of electricity, magnetic, optical, electromagnetic, infrared ray or semiconductor, device or
Device, or any above combination.The more specific example (non exhaustive list) of computer readable storage medium includes: tool
There are electrical connection, the portable computer diskette, hard disk, random access memory (RAM), read-only memory of one or more conducting wires
(Read Only Memory, ROM), erasable programmable read only memory ((Erasable Programmable Read
Only Memory, EPROM) or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), light storage device, magnetic
Memory device or above-mentioned any appropriate combination.In this document, computer readable storage medium, which can be, any includes
Or the tangible medium of storage program, which can be commanded execution system, device or device use or in connection make
With.
Computer-readable signal media may include in a base band or as carrier wave a part propagate data-signal,
Wherein carry computer-readable program code.The data-signal of this propagation can take various forms, including but unlimited
In electromagnetic signal, optical signal or above-mentioned any appropriate combination.Computer-readable signal media can also be that computer can
Any computer-readable medium other than storage medium is read, which can send, propagates or transmit and be used for
By the use of instruction execution system, device or device or program in connection.
The program code for including on computer-readable medium can transmit with any suitable medium, including --- but it is unlimited
In wireless, electric wire, optical cable, radio frequency (Radio Frequency, RF) etc. or above-mentioned any appropriate combination.
The computer for executing operation of the present invention can be write with one or more programming languages or combinations thereof
Program code, described program design language include object oriented program language-such as Java, Smalltalk, C++,
Further include conventional procedural programming language --- such as " C " language or similar programming language.Program code can
Fully to execute, partly execute on the user computer on the user computer, be executed as an independent software package,
Part executes on the remote computer or executes on a remote computer or server completely on the user computer for part.
In situations involving remote computers, remote computer can pass through the network of any kind --- including local area network (LAN)
Or wide area network (WAN)-is connected to subscriber computer, or, it may be connected to outer computer (such as utilize Internet service
Provider is connected by internet).
Embodiment eight
The embodiment of the present invention eight additionally provides a kind of computer readable storage medium, is stored thereon with computer program, should
Program can realize media data error correction method described in above-described embodiment two when being executed by processor: receive what encoding terminal was sent
The RTP media data packet and RTP redundancy packet being respectively grouped, and RTP deblocking processing is carried out, the whole for obtaining each grouping has received original
Beginning media data packet and redundancy packet；Wherein, the RTP redundancy packet is according to whole original media data packets in a grouping
After coding, carries out RTP encapsulation processing and generate；For each grouping, if it is determined that do not receive any original matchmaker in the grouping
Volume data packet is recovered and is not connect in the grouping then according to all original media data packet and redundancy packet has been received in the grouping
The original media data packet received.The description of its concrete details content can refer to embodiment seven.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of media data error correction transmission method characterized by comprising
Original media data packet is grouped in numerical order；
For each grouping, the original media data packet in the grouping is carried out the generation of realtime transmission protocol RTP encapsulation process should
The RTP media data packet of grouping is sent to purpose terminal, and each original media data packet is carried out local deposit according to grouping
Storage；
When determining whole original media datas coating storage in the grouping, by whole original media data packets in the grouping
Coded treatment is carried out, the redundancy packet of the grouping is generated；
The RTP redundancy packet that redundancy packet progress RTP encapsulation processing generates the grouping is sent to the purpose terminal.
2. the method according to claim 1, wherein being grouped in numerical order by original media data packet
Before, further includes:
Setting byte of header in the RTP data structure for including in the corresponding datagram of the original media data packet is deleted
Subtract.
3. the method according to claim 1, wherein original media data packet is grouped in numerical order,
Include:
If it is determined that of length no more than given threshold of the original media data packet, then directly by the original media data packet
As the data packet to be sent in grouping；
Otherwise, the original media data packet is truncated according to the position of the corresponding data packet length of the given threshold,
Two new data packets are formed, and using described two new data packets as the data packet to be sent in grouping.
4. a kind of media data error correction method characterized by comprising
The RTP media data packet being respectively grouped and RTP redundancy packet that encoding terminal is sent are received, and carries out RTP deblocking processing, is obtained
Whole to each grouping has received original media data packet and redundancy packet；Wherein, the RTP redundancy packet is to be grouped according to one
In whole original media data packet encoders after, carry out RTP encapsulation processing generate；
For each grouping, if it is determined that do not receive any original media data packet in the grouping, then according in the grouping
Original media data packet and redundancy packet all have been received, has recovered the original media data packet not received in the grouping.
5. according to the method described in claim 4, it is characterized in that, according to original media data packet has all been received in the grouping
And redundancy packet, recover the original media data packet not received in the grouping, comprising:
Original media data packet, which has been received, according to the whole generates error correction redundancy packet；
The original media data packet not received in the grouping is recovered according to the redundancy packet and the error correction redundancy packet.
6. according to the method described in claim 5, it is characterized in that, being recovered according to the redundancy packet and the error correction redundancy packet
The original media data packet not received in the grouping, comprising:
The redundancy packet and the error correction redundancy packet are done into subtraction process, obtain the original media data not received in the grouping
The expression formula of packet；
It is solved, is obtained according to expression formula of the predetermined linear Algebraic Algorithm to the original media data packet not received in the grouping
The original media data packet not received into the grouping；
Wherein, the redundancy packet is generated by media data packet and the product of one-dimensional coefficient vector matrix.
7. a kind of media data error correction transmission device characterized by comprising
Data packet grouping module, for original media data packet to be grouped in numerical order；
Packet sending module, for for each grouping, the original media data packet in the grouping to be carried out RTP encapsulation processing
The RTP media data packet for generating the grouping is sent to purpose terminal, and each original media data packet is carried out according to grouping
It is locally stored；
Redundancy packet generation module, for determine in the grouping whole original media datas coating storage when, will be in the grouping
Whole original media data packets carry out coded treatment, generate the redundancy packet of the grouping；
Redundancy packet sending module, the RTP redundancy packet for redundancy packet progress RTP encapsulation processing to be generated the grouping are sent to
The purpose terminal.
8. a kind of media data error correction device characterized by comprising
Packet-receiving module, for receiving the RTP media data packet being respectively grouped and RTP redundancy packet of encoding terminal transmission,
And RTP deblocking processing is carried out, the whole for obtaining each grouping has received original media data packet and redundancy packet；Wherein, the RTP
Redundancy packet is to carry out RTP encapsulation according to after whole original media data packet encoders in a grouping and handle generation；
Data packet recovery module, for for each grouping, if it is determined that do not receive any original media number in the grouping
According to packet, then according to all original media data packet and redundancy packet has been received in the grouping, recovers and do not received in the grouping
Original media data packet.
9. a kind of computer equipment, which is characterized in that the equipment includes:
One or more processors；
Storage device, for storing one or more programs,
When one or more of programs are executed by one or more of processors, so that one or more of processors are real
Now such as media data error correction transmission method as claimed in any one of claims 1-3, or realize such as institute any in claim 5-6
The media data error correction method stated.
10. a kind of computer storage medium, is stored thereon with computer program, which is characterized in that the program is executed by processor
Shi Shixian media data error correction transmission method for example as claimed in any one of claims 1-3, or realize as appointed in claim 5-6
Media data error correction method described in one.
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