CN101166273A - Method, device and system for transmitting video data - Google Patents
Method, device and system for transmitting video data Download PDFInfo
- Publication number
- CN101166273A CN101166273A CN 200610140581 CN200610140581A CN101166273A CN 101166273 A CN101166273 A CN 101166273A CN 200610140581 CN200610140581 CN 200610140581 CN 200610140581 A CN200610140581 A CN 200610140581A CN 101166273 A CN101166273 A CN 101166273A
- Authority
- CN
- China
- Prior art keywords
- data
- block
- group
- data block
- check
- 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.)
- Pending
Links
Images
Landscapes
- Compression Or Coding Systems Of Tv Signals (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The invention includes following steps: first, carrying out compressed encoding process for video data to be transmitted so as to obtain multiple data blocks after encoding process; then, carrying out error correction coding process for the said multiple data blocks to obtain corresponding checking blocks; finally, carrying out interlacing process for the said data blocks and the checking blocks, as well as packing, packaging, and transmitting the interlaced data blocks and checking blocks. In the invention, since it is lower correlativity between data blocks packaged in same or successive interlaced data packets, thus even if packet loss occurs in the transmission, the possibility that the receiving end is unable to decode the received data is reduced greatly. The invention raises quality for transferring video data through IP network, wireless network etc, where packet loss exists.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the implementation that a kind of video data transmits.
Background technology
Along with the fast development of mobile communication system and IP network, video communication just will progressively become one of main business of communication.ITU-T (International Telecommunications Union) continues and has formulated H.261, H.263, H.263+ reaches and H.264 wait video compression standard.Wherein, described H.264 video compression coding standard has become the mainstream standard in the multimedia communication gradually.Described H.264 standard can improve video coding efficient more effectively, with and to the suitability of network.
Because on IP network, it is corresponding that real-time application is the transmission of employing Real-time Transport Protocol substantially as multimedias such as video, audio frequency, therefore, in the process that on IP network, transmits based on the data that H.264 wait coding standard, also adopt RTP (real time transport protocol) agreement to realize usually.Certainly, in IP network, according to the data transfer needs of reality, the video data after also can adopting other agreements to compressed coding encapsulates transmission.
Described Real-time Transport Protocol structurally goes for the transmission at different media data type, just for various upper-layer protocol, for example, H.261, H.263, video encoding standard agreements such as MPEG-1/-2/-4, MP3, need to adopt different RTP payload packing agreements (Payloadpacketization/encapsulation protocols), promptly adopt different RTP encapsulation packaging methods; For example, for coding standard H.264, can adopt IETF (Internet Engineering TaskForce, internet engineering ad hoc working group) standard as video data standard of foundation in the transport process on IP network.
With coding standard H.264 is example, transmits processing procedure based on the video data of Real-time Transport Protocol accordingly and specifically comprises:
At first, video bit stream cut apart according to certain rule form NALU (NetworkAbstraction Layer, network abstraction layer unit) stream, for example, can be with a two field picture as a NALU, also can be with a Slice (band) as a NALU;
Then, it is tactful to pack according to the encapsulation relevant with application, and NALU stream is encapsulated the formation RTP data packet stream of packing; In the RTP packet, after the header is exactly the NALU data field, if a RTP data envelope is equipped with a plurality of NALU, then each NALU needs end to end arrangement, each NALU occupies one section continuous bit, and first byte of each NALU is a NALU header byte; Last at the RTP packet can also be provided with corresponding optionally padding data bit as required.
For other coding standards, as H.261, standard etc. H.263, it in transport process the notion that does not relate to described NALU, but corresponding video data transport process and above-mentioned video data transport process based on standard H.264 are similar, promptly in data transfer procedure, at first need the data behind the compressed encoding are carried out piecemeal, again the agreement of using in the The data IP network behind the piecemeal (as Real-time Transport Protocol) is encapsulated transmission successively afterwards.
Because all have the problem of packet loss in IP network and wireless network, and the appearance of packet loss phenomenon is apparent to the adverse effect that video data transmits generation, therefore, the adverse effect that overcomes the packet loss generation is to guarantee video data delivery quality key factor.
Yet, transmit in the processing procedure at above-mentioned video data, do not adopt anti-lost packet processing strategy.Like this, when packet loss takes place, cause probably and can't decode at receiving terminal, thereby can't obtain corresponding reconstructing video data.Therefore, in IP network, the video data that provides in the prior art transmits the delivery quality that processing scheme can't guarantee video data at all.
Summary of the invention
The purpose of this invention is to provide a kind of method, Apparatus and system of realizing that video data transmits, video data is transmitted the adverse effect that causes with the packet loss phenomenon that effectively overcomes in the network, thus can be so that the delivery quality of video data gets a promotion in the network.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of method that realizes that video data transmits, comprising:
Video data to be transmitted to current batch carries out compressed encoding, a plurality of data blocks behind the acquisition compressed encoding;
Described a plurality of data blocks are carried out error correction coding handle, obtain corresponding check block;
Described data block and check block are carried out interleaving treatment, and send after the data block after the interleaving treatment and check block be packaged into packet.
Described error correction coding comprises:
Each data block in described batch is divided into groups, and the data block of respectively organizing of gained is carried out the error correction coding processing respectively, obtain one group of corresponding check piece respectively, every group of data block and one group of corresponding check block form an extension blocks group.
In the method for the invention, the data block that contains similar number in each described extension blocks group, and the check block of similar number, and the equal in length of each data block in the described extension blocks group, the equal in length of each check block, the equal in length of data block and check block.
Described method also comprises: with the data block in each extension blocks group and check block according to data block preceding, check block after order nonnegative integer serial number, and described interleaving treatment comprises: with the identical data block of sequence number in described each extension blocks group, perhaps check block is formed an interleaving block group, and the data block in each interleaving block group and check block will be packaged in the packet that same packet or one group of transmission link to each other in proper order.
Described encapsulation comprises:
Non-conterminous data block is packaged in the packet that same packet or one group of transmission link to each other in proper order on one group of time that interleaving treatment is obtained or the space; And/or, will handle the check block that produces through described error correction coding by non-conterminous data block on time or the space and be packaged in the packet that same packet or one group of transmission link to each other in proper order; Wherein, comprise in the header of described packet: the interleaving index field, and comprise error correction coding type field, data block size field alternatively, whether adopt at least one in interweave algorithm attribute field and the reserved field.
Described encapsulation comprises: adopt RTP to encapsulate data block after the interleaving treatment and check block.
Described method also comprises:
At receiving terminal, receive one group of packet of a batch of video data correspondence, from described one group of packet, extract to obtain multi-group data block sum check piece, comprise several number according to the block sum check piece in every group;
Described multi-group data piece is united the processing that deinterleaves, the data block and the check block of a batch of video data correspondence after obtaining deinterleaving, data block after described the deinterleaving and check block comprise a plurality of groups, and each group contains a plurality of data blocks and check block; Then, described each group data block and check block are carried out the error correction decoding processing, the data block after the many groups of processing of acquisition correspondence;
Data after described many group processing are carried out compression coding handle, obtain the video data of reconstruct.
Described error correction decoding is handled and is comprised: each data block in each extension blocks group and check block are detected determined whether dropout of data block, if dropout of data block is arranged, then utilize other data block and check block in this group to handle, obtain the data block of losing by the recovery that error correction decoding carries out the obliterated data piece.
Described method also comprises:
Judge the type of compress coding data to be transmitted, if determine that according to predefined information the type of described compress coding data is a significant data, then right described data block and the check block that obtains through error correction coding encapsulate transmission; Otherwise, carry out interleaving treatment to described data block with through the check block that error correction coding obtains, and data block after the interleaving treatment and check block encapsulated transmission.
The method of the type of the compress coding data that described judgement is to be transmitted specifically comprises: carry out the judgement of the type of coded data according to the carrying of the sign in compress coding data header data type field.
The present invention also provides a kind of device of realizing that video data transmits, comprising:
Compressed encoding unit, the original video data that is used to treat transmission carry out compressed encoding to be handled, and obtains a plurality of data blocks after the encoding process;
The error correction coding unit is used for that described a plurality of data blocks are carried out error correction coding and handles, and obtains corresponding check block;
Interleave unit is used for described data block and check block are carried out interleaving treatment;
Packing sends processing unit, is used for data block after the interleaving treatment and check block are encapsulated the packing processing, and sends.
Described interleave unit specifically is that data block and/or the check block that will belong to same batch carry out interleaving treatment, makes adjacent data block on time or space, and is through interweaving, non-conterminous on sending order; Feasible non-conterminous on sending order through the check block that described error correction coding processing produces by data block adjacent on time or space, thus interweave back data block and/or check block generated.
Described packing sends processing unit and is used for non-conterminous data block on one group of time after the interleaving treatment or the space, and/or, one group of check block of handling to produce through described error correction coding by non-conterminous data block on time or the space, in the one group of packet that is packaged in same packet or sends in succession, and send.
Described packing sends specifically adopts Real-time Transport Protocol to carry out the encapsulation of packet in the processing unit.
Described device also comprises the judgment processing unit, be used to judge the type of compress coding data to be transmitted, if determine that according to predefined information the type of described compress coding data is a significant data, then described data block and the check block that obtains through error correction coding are encapsulated transmission; Otherwise, trigger described interleave unit and carry out interleaving treatment, and encapsulate transmission by sending the data block and the check block of processing unit after to interleaving treatment to described data block with through the check block that error correction coding obtains.
The present invention also provides a kind of system that realizes that video data transmits, comprise device and the video data receiving system of realizing that video data transmits, and described video data receiving system is arranged at receiving terminal, be used to receive one group of packet of batch of video data correspondence that device that described realization video data transmits sends, from described one group of packet, extract data block and the check blocks of many groups, comprise several number according to the block sum check piece in every group through interweaving; Afterwards, described multi-group data block sum check piece is united the processing that deinterleaves, obtain a plurality of extension blocks groups, detect judgement for each extension blocks group then, and according to detecting judged result, determine to carry out or do not carry out error correction decoding and handle, obtain the data block after a plurality of processing; At last, the data after described a plurality of processing are carried out compression coding handle, obtain the video data of reconstruct.
As seen from the above technical solution provided by the invention, the present invention has mainly adopted the implementation that transmits that interweaves that the video data after encoding is transmitted, the packet loss phenomenon appears even make, but same packet or the correlation between each data block in one group of packet in succession after owing to interweave are lower, cause accordingly reducing greatly in the possibility that receiving terminal can't decoded data.Therefore, realization of the present invention makes the delivery quality that still can effectively promote video data in there is the network environment of packet loss phenomenon in IP network, wireless network etc.
To adopt Real-time Transport Protocol that the video data of standard H.264 is transmitted as example, the present invention has also carried out corresponding improvement to the Real-time Transport Protocol of extensive use, make in its transport process at video H.264, can carry out interleaving treatment to video data, thereby can improve greatly at the video data delivery quality that exists under the network environment of packet loss.
In a word, realization of the present invention makes and can obtain higher video delivery quality in the multimedia video communication process, and preferable user experience.And then make multimedia communication service can attract more user, for operator and equipment vendors bring remarkable economic efficiency.
Description of drawings
Fig. 1 is the interleaving procedure schematic diagram of video data transmitting terminal;
Fig. 2 is the deinterleaving processing procedure schematic diagram of video data receiving terminal;
Fig. 3 is the specific implementation process schematic diagram of the method for the invention;
Fig. 4 is improved Real-time Transport Protocol header structural representation among the present invention;
Fig. 5 is an application example schematic diagram of the present invention;
Fig. 6 is the specific implementation structural representation of system of the present invention.
Embodiment
The present invention mainly is in order to solve the video data delivery quality problem in the network environment that there are the packet loss problem in IP network and wireless network etc. in the specific implementation process, promptly overcomes video data to be transmitted the adverse effect that produces because of the packet loss phenomenon in the network.
The concrete implementation method that overcomes packet loss that adopts is among the present invention: interleaving technology and FEC (forward error correction coding, Forward Error Correction) technology.
Wherein, described interleaving technology is by changing the sending order of encoded video data, so that adjacent video data is no longer adjacent in time on the former time, be that video data adjacent on the sending order is no longer adjacent on time and space, thereby reduce the correlation between the adjacent data on the sending order.Like this, if packet loss takes place, then the data dependence owing to adjacent on the sending order is lower, and therefore, the influence that causes accordingly is also just smaller.
The realization principle of concrete interleaving treatment as shown in Figure 1, before interweaving, if it is spatially adjacent between the data, as C frame among Fig. 1 and D frame, perhaps, adjacent in time, as A frame among Fig. 1 and B frame, then correlation is higher between each frame, and behind the encoder compresses coding, packed data corresponding in the compressing video frequency flow of output is adjacent on sending order.
For the video data after the compression, directly packing transmits if do not carry out interleaving treatment, then if the packet loss phenomenon occurs, will drop-out time or the space on adjacent data, as shown in Figure 2, when packet loss, the situation of losing a slice image block may appear then connecting, at this moment, obviously can produce totally unfavorable influence to decode procedure.Therefore, among the present invention, the implementation of interleaving treatment is carried out in employing to the data after compressing, make in the space or on the time adjacent compression of video data data no longer adjacent on sending order, like this, when the packet loss phenomenon occurring, still as shown in Figure 2, the image block of losing accordingly will can not join together again, thereby makes and just can obtain correct decoded data by corresponding mechanism for correcting errors.
From foregoing description as can be seen,, also need the video packets of data of the transmission in network is adopted corresponding FEC (forward error correction coding) technology, certainly, also can adopt other functionally similar error correction codings for guaranteeing to obtain correct decoded data.Described FEC is used for the data that need protection are encoded, and forms data redundancy, thereby increases the wrong ability of resisting.Cardinal error is the packet loss mistake on packet networks, i.e. deletion error (Erasure Error).Error correction coding at deletion error is called correcting and eleting codes (Erasure Codes).
Described correcting and eleting codes specifically is that the data code flow order is divided into the identical unit one by one of size piecemeal, also is called back end (Data Nodes), supposes total n data node; Then; calculate for these back end according to certain mathematical operation rule and to produce check-node (ParityNodes or Check Nodes); in order to strengthen protective capability; can also continue to produce second layer check-node for these check-nodes according to identical or different mathematical operation rule computings; and the like, can also produce corresponding the 3rd layer, the 4th layer, until N layer check-node.In general, if relate to the multilayer check-node, the interstitial content on every layer is to successively decrease according to certain rule (as geometric ratio rule etc.) with respect to last layer, successively passs the multilayer node structure that contracts thereby form one.The processing time complexity of described correcting and eleting codes is to have linear relationship with the data section n that counts.
Among the present invention, main processing procedure may further comprise the steps as shown in Figure 3:
Step 31: handle the one group of data block to be transmitted behind the acquisition piecemeal to carrying out piecemeal through current batch video data after the encoding compression;
Specifically can handle, divide the block operations can be for based on band or carry out the division of data block based on a two field picture etc. accordingly carry out piecemeal based on encoded video data H.261, H.263 or H.264;
Step 32: each data block that comprises in described one group of data block to be transmitted is carried out error correction coding and interleaving treatment, make on the one hand and can carry out corresponding error correction at receiving terminal, on the other hand, it is no longer adjacent after interleaving treatment also to make former space or time go up adjacent data blocks;
Described error correction coding is specifically as follows: each data block in current batch is divided into groups, and the data block of respectively organizing of gained carried out error correction coding respectively and handle, obtain one group of corresponding check piece respectively, every group of data block and one group of corresponding check block form an extension blocks group, therefore, corresponding one by one between the data chunk before corresponding extension blocks group and the error correction coding;
In addition, for ease of interleaving treatment, also with the data block in the described extension blocks group and check block according to data block preceding, check block after order with nonnegative integer serial number (as according to the incremental order numbering), like this, each data block and check block all can corresponding nonnegative integer sequence numbers, and each extension blocks group adopts identical one group of sequence number value and serial number mode to be numbered, afterwards, just can carry out interleaving treatment and transmission to each piece according to sequence number.
Described interleaving procedure is specially: with the identical data block of sequence number in described each extension blocks group, perhaps check block is formed an interleaving block group, and therefore formed interleaving block group sum equals the sum that data block in the extension blocks group adds check block.
For example, to after generating back end and check-node based on standard N ALU H.264 by the FEC protection, for the FEC intangibility that prevents to cause, before corresponding back end and check-node are encapsulated, also need each FEC node is carried out interleaving treatment because of burst error;
Processing by this step just can effectively reduce the influence that packet loss causes video data;
Step 33: will encapsulate packing through the data block after error correction coding and the interleaving treatment (specifically comprising data block and check block) and handle, and send;
Specifically can be based on the Real-time Transport Protocol processing of packing, perhaps, also can be based on the transportation protocol of using in other networks processing of packing;
Step 34: receiving terminal carries out stores processor, all data blocks (comprising check block) in the same one-level group data block after receiving piecemeal after receiving the packet that carries the data block (comprising check block) after the interleaving treatment;
Step 35: utilize all data blocks (comprising check block) that receive to carry out deinterleaving (deinterleaving) and decoding processing, obtain the original video data that transmitting terminal sends, be specifically as follows:
At receiving terminal, receive one group of packet of a batch of video data correspondence, comprise a plurality of data blocks and/or check block in each packet, from described one group of packet, extract to obtain multi-group data block sum check piece, comprise several number according to the block sum check piece in every group;
Described multi-group data block sum check piece is united the processing that deinterleaves, the data block and the check block of a batch of video data correspondence after obtaining deinterleaving, data block after described the deinterleaving and check block comprise a plurality of groups, and each group contains a plurality of data blocks and check block;
Afterwards, described each group data block and check block are carried out error correction decoding handle,, obtain the corresponding many groups of data blocks after handling as the fec decoder processing etc.;
At last, the data after described many group processing are carried out compression coding handle, thereby the video data of acquisition reconstruct is finished the reception of video data.
In above-mentioned processing procedure, because the processing that step 31 and step 32 are carried out needs certain processing time-delay, therefore, also can select not carry out the processing of above-mentioned described step 31 and step 32 for the significant data that transmits in the network or delay sensitive rank higher data.That is to say, in network, can only carry out transmitting again after the interleaving treatment as required to the video data after the part encoding compression, for this reason, receiving terminal can in the data that transmit, indicate whether to have adopted interleaving treatment, so that can carry out correct processing (promptly determining whether to carry out the processing that deinterleaves) to the data that receive.
For ease of the understanding of the present invention, the present invention is described in detail below in conjunction with concrete application example.Specifically in IP network, to carry out video data encoding based on standard H.264, and adopt Real-time Transport Protocol to carry out data to be transmitted as example, the present invention has mainly provided a kind of the support based on the video data etc. of coding H.264) the improvement Real-time Transport Protocol that interweaves, the implementation that this improved Real-time Transport Protocol can interweave and transmit for compressed video data H.264, make in carrying H.264 the video data process, can obtain better conveying function and delivery quality; Simultaneously, corresponding implementation also can not influence the operate as normal of Real-time Transport Protocol in concrete application process.
For ease of describing, corresponding improved Real-time Transport Protocol can be called DIRTP (DataInterleaved RTP, data interlacing RTP) agreement.
Say that more specifically DIRTP agreement provided by the invention comprises the function of two aspects:
(1) supports multiple FEC safeguard measure, when mistake (as the data lost block etc.) occurring, still can guarantee under to a certain degree, can correctly to decode guaranteeing;
(2) adopt the algorithm that interweaves that the data block that adopts the FEC strategy is carried out interleaving treatment, with the appearance of the FEC undecidable decision problem that effectively prevents to cause because of burst error.
Real-time Transport Protocol is being carried out in the development the crucial improvement that relates to data packet head information, to adapt to the function that needs are realized after the improvement.To the header structure of the DIRTP agreement described in the present invention be described below, as shown in Figure 4, the header structure of described DIRTP agreement comprises:
(1) R field can be 3 bits, is reserved field, and this field is Optional Field, should ignore this field at receiving terminal.
(2) the C field takies individual bit, is used to show whether DIRTP load has used the algorithm that interweaves, if all adopt the algorithm that interweaves, then can omit this field; For example, if DIRTP load used the algorithm that interweaves, then this field be designated as " 1 " otherwise, this field is designated as " 0 ", perhaps, vice versa.
(3) FEC the type field, promptly FEC type of coding code name territory is used to represent different FEC types, for example, this field can take 4 bits, to be used to represent 16 kinds of different FEC types.
(4) FEC Subtype field, it is FEC coding subtype code name information field, be used for being illustrated under each major types that the FEC the type field defines further each subtype of segmentation, the subtype number that the bit number that this field can take needs to distinguish is as required determined, for example, can compare top grade for 9.
(3) in the above-mentioned header structure and (4) two fields are used to describe FEC information, if DIRTP agreement totally 13 bits that have been these two field distribution then can distinguish 2 in theory
13=8192 kinds of different FEC types; As long as the concrete bit number that takies that distributes of these two fields can satisfy the application of distinguishing the FEC type; In addition, these two fields also can be combined into a field, promptly only adopt a field to distinguish corresponding FEC type and subtype simultaneously.
(5) Interleave index field, it is the interleaving index field, be used to show that this DIRTP load is at batch (the same batch multi-group data block sum check piece that is meant same batch video data correspondence that interweaves that interweaves, described multi-group data block sum check piece need unify to carry out interleaving treatment) in radix be 0 call number, described call number is used for fec decoder, for satisfying ropeway carrying-rope quotation marks demand, this field can be distributed and taken 10 bits.
(6) Block size field, i.e. piece size field, the size (size of each data block all equates in a FEC unit) of a data block of this field indication specifically can distribute according to this field of size of present data block to take 8 bits.
The content that the header structure that provides based on above-mentioned DIRTP agreement comprises describes data transfer process process concrete among the present invention down.
For ease of describing, specifically, corresponding data transfer process process is described with based on H.264 using deinterleaving method protection DIRTP to be grouped into example.
Among the present invention, a plurality of data blocks that data H.264 are divided into as shown in Table 1 and Table 2, can be entangled the square formation that t wrong arranged in groups becomes the capable n of i to be listed as with i, each grouping (being data block) be designated as B (i, n).
Table 1
Table 2
If interleaving treatment is not carried out in each grouping, then with reference in the table 1 shown in the dash area, when the burst error (as losing) that runs into continuous j grouping, and, when j is far longer than t, for continuous two code characters (being data block) wherein, because wrong number has been far longer than error correcting capability t, thereby, will cause and can't correctly carry out error correction the code character of makeing mistakes.
If interleaving treatment is carried out in each grouping, then total packet count is constant, transmits order by original B (1,1), B (1,2), B (1,3) ... B (1, n), B (2,1), B (2,2), B (2,3) ... B (2, n) ... B (i, 1), B (i, 2), B (i, 3) ... B (i, n) change into: B (1,1), B (2,1), B (3,1) ... B (i, 1), B (1,2), B (2,2), B (3,2) ... B (i, 2) ... ... B (1, n), B (2, n), B (3, n) ... B (i, order n).Like this, when the packet loss phenomenon occurring, the corresponding error pattern just in time drops in the error correcting capability scope of block code, thereby, can correctly correct a mistake by error correction, realize being correctly decoded.
Therefore, if adopt the data of interleaving treatment scheme behind the coding to handle, can be so that under the same redundant degree, the ability of correcting and eleting codes protection video code flow improves greatly.And owing to do not increase new grouping, therefore, interleaving procedure can not reduce code efficiency.
Usually code character is counted i and call interleaving degree, and interleaving degree i is big more, the ability of anti-packet loss is strong more.But interleaving degree i is big more, and the buffer area of receiving terminal that requires is big more, and corresponding time-delay also can strengthen, thereby, in practical application process of the present invention, can require choose suitable interleaving degree i according to practical design cost and system delay.
Still with based on H.264 using deinterleaving method protection DIRTP to be grouped into example, the processing procedure that realization video data provided by the invention is transmitted is described below.
For ease of understanding, at first the H.264 NALU that relates in the video data transport process based on standard H.264 is introduced below following examples.
The header structure of described NALU is as shown in table 3:
Table 3
| F | NRI | Type |
In the table 3,
F (forbidden_zero_bit) field: take 1bit; Be used for if syntax clash is arranged, then this field is set to 1; Perhaps, when having the bit mistake in Network Recognition this element, also can it be set to 1, so that the recipient loses this unit;
NRI (nal_ref_idc) field: take 2bits, its concrete implication comprises: 00, and the content of expression NALU is not used in the reference picture of rebuilding inter prediction; Non-00, represent that then current NALU is the slice that belongs to reference frame, or SPS, these class data of PPS; The value of this field is big more, represents that current NAL is important more;
Type (Nal_unit_type) field: take 5bits, be used to carry data type information, can be 32 types altogether: 0-31; The particular type implication is referring to table 4:
Table 4
| nal_unit_type | The |
| 0 | Do not specify |
| 1 | The coding slice of |
| 2 | Coding slice data are divided A |
| 3 | Coding slice data are divided B |
| 4 | Coding slice data are divided C |
| 5 | Coding slice in the IDR image |
| 6 | SEI (supplemental enhancement information) |
| 7 | SPS (sequence parameter set) |
| 8 | PPS (picture parameter set) |
| 9 | The access unit delimiter |
| 10 | EOS |
| 11 | Code stream finishes |
| 12 | Padding data |
| 13～23 | Keep |
| 24～31 | Do not specify |
By above-mentioned explanation, the NALU notion that standard H.264 relates to is had gained some understanding, will the processing procedure that realization video data provided by the invention transmits be described below.
Because the significance level difference of NALU H.264, thereby, the acquisition mode difference and the respective data blocks of the data block after the respective coding compression are also inequality to the requirement of time delay, for this reason, the present invention has adopted in the specific implementation process selectively the data block after the part encoding compression to be sent has been carried out interleaving treatment.Corresponding concrete implementation procedure mode is as follows:
(1) at first, distinguish the significance level of NALU;
Because the different values of the NRI field in the header of NALU can be represented the different significance levels of NALU; For example, NRI gets a Slice (band) or a plurality of Slice data band { as P-Slice (inter prediction band), B-slice (bi-directional predicted band) } of depositing non-reference picture among the 0 expression NALU, can not influence subsequent decoding; NRI gets non-0 and then shows and deposit a sequence or image reference collection among the NALU { as SPS (Sequence parameter set, sequential parameter is provided with) and PPS (picture parameter set, image parameter is provided with) } or a Slice or a plurality of Slice data band { as I-Slice (band in the frame) } of reference picture, can have a strong impact on subsequent decoding;
In the correcting and eleting codes protection and interleaving procedure H.264 code stream carried out based on packet, can be divided into two classes according to the value general data H.264 of NRI: non-significant data and significant data.
(2) selectively part NALU is carried out interleaving treatment according to the significance level of NALU;
(1) for sending again after the non-important The data interleaving treatment;
Be specially: for inferior important information, it is non-significant data, as P-Slice, B-slice etc., because these class data are lower than the significance level of I-Slice etc., and data volume is big, delay requirement is also lower, therefore, can adopt the correcting and eleting codes protection that redundancy is little, protective capability is more weak relatively usually for these class data, simultaneously, in order to prevent at receiving terminal, because of losing too much FEC bag, cause FEC to decode above the FEC error correcting capability, also should be before the DIRTP encapsulation, earlier the FEC bag is carried out interleaving treatment, encapsulation sends again afterwards;
Concrete interleaving procedure comprises:
At first, when inferior important information being carried out FEC protection and interleaving treatment, be to regard the data such as P-Slice, B-Slice between two I-Slice as an integral body; Suppose that the corresponding total bytes of time important information continuously is W, then data are divided into size and are the data block of D byte, when W can not be divided exactly by D, fill 0, obtain new numerical value W ', so that W ' can be divided exactly by D W byte back.Like this, corresponding data will be divided into altogether [W/D] or [W '/D] individual data block.
As shown in Figure 5, suppose every K data block through N FEC piece of FEC protection back generation (K data block wherein, M check block, N=K+M); Interleave depth be i (i＜=N) wherein, then one interweave batch in the FEC piece add up to n=i*N; For not increasing the DIRTP header, can make i=N among Fig. 5.
Like this, as long as transmit a parameter N, rather than two parameter i and N represent method in batches in header.Wherein, described N FEC piece is called in the algorithm that a FEC piece group describes in the above, if remaining FEC piece group number is during less than N, the value that reduces i that also can be suitable is promptly got i＜N.
Afterwards, each FEC block interleaving processing procedure of being encapsulated into DIRTP load (interleaving degree i=N) specifically comprises:
1, first DIRTP bag in interweaving batch:
Interleave index=0 in the header;
2, second DIRTP bag in interweaving batch:
Interleave index=1 in the header;
3, N DIRTP bag in interweaving batch:
Interleave index=N-1 in the header;
FEC piece N-1, FEC piece 2N-1, FEC piece 3N-1, FEC piece 4N-1......FEC piece iN-1.
At last, at receiving terminal, need the buffer area that to deposit at least one N DIRTP bag that interweaves batch, when receiving terminal receives first DIRTP bag that the next one interweaves batch (when receiving all N DIRTP packets), N the DIRTP bag deinterleaving that receives is previously handled, to obtain the preceding video data that interweaves that transmitting terminal sends.
In above-mentioned processing procedure, when [W/D] can not be divided exactly by K, be that the data block of D can not be carried out FEC protection and interleaving treatment then at the size of remainder at non-significant data.Can adopt (but being not limited to) following dual mode for the processing of these remaining data:
1, respective data blocks is reclassified as littler data block, carries out FEC protection and interleaving treatment again, afterwards, encapsulation sends;
2, corresponding data block is directly encapsulated transmission without FEC protection and interleaving treatment, for example, when the number of the data block of remainder more after a little while, just can adopt these processing means.
(2) then do not carry out interleaving treatment for significant data information;
Be specially for the NALU that has carried significant data,, need adopt and to use the correcting and eleting codes protection that redundancy is big, anti-packet loss ability is strong as SPS, PPS, I-Slice etc.Like this, compare with P-Slice, an onesize K data block after the correcting and eleting codes protection, will generate more check block.
Because this class significant data is also higher to the requirement of time delay, promptly allows less time delay, therefore, protect the FEC piece that generates not use the algorithm that interweaves to the NALU process correcting and eleting codes of this class.This be because, if adopt the algorithm that interweaves will introduce bigger time delay, and owing to will generate more check block at significant data, promptly N value is bigger, corresponding interleaving degree will be bigger, this one goes on foot the increase time delay nearly.Therefore, for I-Slice, after through the correcting and eleting codes protection, do not re-use the algorithm that interweaves.But, require a FEC to be packaged into a DIRTP load in order to prevent decoding end FEC intangibility.
Therefore, among the present invention, utilize certain or some bytes or bit in the present RTP header that Real-time Transport Protocol is improved to realize the present invention.And but corresponding byte or bit specifically can adopt definition reservation or extended byte or bit among the RTP.Like this, the Real-time Transport Protocol after the improvement does not influence the interoperability with former Real-time Transport Protocol.Promptly in communication, some terminal adopts according to the improved Real-time Transport Protocol of the present invention, and other terminal adopts not improved Real-time Transport Protocol, can realize proper communication between these terminals.
In addition, the present invention also in the header of RTP packet, takes corresponding sign difference improvement project RTP and original RTP difference between the two, so that system discerns, at different situations, takes different treatment measures.
The present invention also provides a kind of system that realizes that video data transmits, and the specific implementation structure of this system mainly comprises device and the video data receiving system of realizing that video data transmits as shown in Figure 6, below will be respectively the specific implementation of stream oriented device be described:
(1) as shown in Figure 6, the device that described realization video data transmits specifically can comprise following processing unit:
(1) compressed encoding processing unit, the video data to be transmitted that is used for current batch carries out the compressed encoding processing, a plurality of data blocks after the acquisition encoding process;
Be specifically as follows based on standard H.261, H.263 or H.264 etc. and realize that respective coding handles;
(2) error correction coding unit is used for that described a plurality of data blocks are carried out error correction coding and handles, and obtains corresponding check block;
(3) interleave unit is used for the described data block and the check block of current batch video data correspondence are carried out interleaving treatment, obtains the same interleaving treatment result who interweaves batch;
Be specially: the data block and/or the check block of current batch video data correspondence are carried out interleaving treatment, thereby generate interweave back data block and/or check block; Described interleaving treatment can so that: adjacent data block on time or space, through interweaving, non-conterminous on sending order; Data block adjacent on time or space is non-conterminous on sending order through the check block that described error correction coding processing produces.
(4) packing sends processing unit, be used for belonging to the data block after interleaving treatment that same batch video data correspondence comprises and/check block, non-conterminous data block on one group of time or the space, and/or, one group of check block of handling to produce through described error correction coding by non-conterminous data block on time or the space, be packaged in transmission in the continuous packet of same packet or sending order (i.e. packet in succession), and, specifically can adopt Real-time Transport Protocol to carry out the encapsulation of packet.
Be the differentiated treatment data of different types, device of the present invention can also comprise the judgment processing unit, this unit is used to judge the type of compress coding data to be transmitted, if determine that according to predefined information the type of described coded data is a significant data, then trigger to described data block with through the check block that error correction coding obtains and directly encapsulate transmission, otherwise, trigger described interleave unit and carry out interleaving treatment to described data block with through the check block that error correction coding obtains, and by send processing unit after to interleaving treatment data block and the check block that obtains through error correction coding encapsulate transmission.
(2) described video data receiving system is arranged at receiving terminal, be used to receive one group of packet (promptly receiving same all packets that interweave batch) of a batch of video data correspondence, and from described one group of packet, extract data block and the check blocks of many groups through interweaving, comprise several number according to the block sum check piece in every group; Afterwards, data block after the interleaving treatment that preservation receives and check block, when one group of packet of a batch of video data correspondence finishes receiving, after promptly obtaining all data blocks and check block of this batch video data correspondence, the multi-group data block sum check piece of receiving is united the processing that deinterleaves, obtain a plurality of extension blocks groups, detect judgement for each extension blocks group then, and according to detecting judged result, determine to deinterleave after handling data block and check block carries out or do not carry out error correction decoding and handle, obtain the data block after a plurality of processing; At last, the data after described a plurality of processing are carried out compression coding handle, obtain the video data of corresponding reconstruct, as the original video data of transmitting terminal transmission.
Concrete error correction coding and the interleaving treatment scheme that adopts of each device and processing unit described in detail in front in the system of the present invention, so repeat no more.
In sum, the present invention has mainly adopted the implementation that transmits that interweaves that the video data after encoding is transmitted, the packet loss phenomenon appears even make, but the correlation between each data block in the same packet after owing to interweave is lower, causes accordingly reducing greatly in the possibility that receiving terminal can't decoded data.Therefore, realization of the present invention makes the delivery quality that still can effectively guarantee video data in there is the network environment of packet loss phenomenon in IP network, wireless network etc.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (16)
1. a method that realizes that video data transmits is characterized in that, comprising:
Video data to be transmitted to current batch carries out compressed encoding, a plurality of data blocks behind the acquisition compressed encoding;
Described a plurality of data blocks are carried out error correction coding handle, obtain corresponding check block;
Described data block and check block are carried out interleaving treatment, and send after the data block after the interleaving treatment and check block be packaged into packet.
2. method according to claim 1 is characterized in that, described error correction coding comprises:
Each data block in described batch is divided into groups, and the data block of respectively organizing of gained is carried out the error correction coding processing respectively, obtain one group of corresponding check piece respectively, every group of data block and one group of corresponding check block form an extension blocks group.
3. method according to claim 2, it is characterized in that, the data block that contains similar number in each described extension blocks group, and the check block of similar number, and the equal in length of each data block in the described extension blocks group, the equal in length of each check block, the equal in length of data block and check block.
4. method according to claim 3, it is characterized in that, described method also comprises: with the data block in each extension blocks group and check block according to data block preceding, check block after order nonnegative integer serial number, and described interleaving treatment comprises: with the identical data block of sequence number in described each extension blocks group, perhaps check block is formed an interleaving block group, and the data block in each interleaving block group and check block will be packaged in the packet that same packet or one group of transmission link to each other in proper order.
5. method according to claim 1 is characterized in that, described encapsulation comprises:
Non-conterminous data block is packaged in the packet that same packet or one group of transmission link to each other in proper order on one group of time that interleaving treatment is obtained or the space; And/or, will handle the check block that produces through described error correction coding by non-conterminous data block on time or the space and be packaged in the packet that same packet or one group of transmission link to each other in proper order; Wherein, comprise in the header of described packet: the interleaving index field, and comprise error correction coding type field, data block size field alternatively, whether adopt at least one in interweave algorithm attribute field and the reserved field.
6. method according to claim 1 is characterized in that, described encapsulation comprises: adopt real time transport protocol RTP to encapsulate data block after the interleaving treatment and check block.
7. according to each described method of claim 1 to 6, it is characterized in that described method also comprises:
At receiving terminal, receive one group of packet of a batch of video data correspondence, from described one group of packet, extract to obtain multi-group data block sum check piece, comprise several number according to the block sum check piece in every group;
Described multi-group data piece is united the processing that deinterleaves, the data block and the check block of a batch of video data correspondence after obtaining deinterleaving, data block after described the deinterleaving and check block comprise a plurality of groups, and each group contains a plurality of data blocks and check block; Then, described each group data block and check block are carried out the error correction decoding processing, the data block after the many groups of processing of acquisition correspondence;
Data after described many group processing are carried out compression coding handle, obtain the video data of reconstruct.
8. method according to claim 7, it is characterized in that, described error correction decoding is handled and is comprised: each data block in each extension blocks group and check block are detected determined whether dropout of data block, if dropout of data block is arranged, then utilize other data block and check block in this group to handle, obtain the data block of losing by the recovery that error correction decoding carries out the obliterated data piece.
9. according to each described method of claim 1 to 6, it is characterized in that described method also comprises:
Judge the type of compress coding data to be transmitted, if determine that according to predefined information the type of described compress coding data is a significant data, then right described data block and the check block that obtains through error correction coding encapsulate transmission; Otherwise, carry out interleaving treatment to described data block with through the check block that error correction coding obtains, and data block after the interleaving treatment and check block encapsulated transmission.
10. method according to claim 9, it is characterized in that the method for the type of the compress coding data that described judgement is to be transmitted specifically comprises: carry out the judgement of the type of coded data according to the carrying of the sign in compress coding data header data type field.
11. a device of realizing that video data transmits is characterized in that, comprising:
Compressed encoding unit, the original video data that is used to treat transmission carry out compressed encoding to be handled, and obtains a plurality of data blocks after the encoding process;
The error correction coding unit is used for that described a plurality of data blocks are carried out error correction coding and handles, and obtains corresponding check block;
Interleave unit is used for described data block and check block are carried out interleaving treatment;
Packing sends processing unit, is used for data block after the interleaving treatment and check block are encapsulated the packing processing, and sends.
12. device according to claim 10, it is characterized in that described interleave unit specifically is that data block and/or the check block that will belong to same batch carry out interleaving treatment, make adjacent data block on time or space, through interweaving, non-conterminous on sending order; Feasible non-conterminous on sending order through the check block that described error correction coding processing produces by data block adjacent on time or space, thus interweave back data block and/or check block generated.
13. device according to claim 12, it is characterized in that, described packing sends processing unit and is used for non-conterminous data block on one group of time after the interleaving treatment or the space, and/or, one group of check block of handling to produce through described error correction coding by non-conterminous data block on time or the space, in the one group of packet that is packaged in same packet or sends in succession, and send.
14. device according to claim 11 is characterized in that, described packing sends specifically adopts Real-time Transport Protocol to carry out the encapsulation of packet in the processing unit.
15. according to each described device of claim 11 to 14, it is characterized in that, described device also comprises the judgment processing unit, be used to judge the type of compress coding data to be transmitted, if determine that according to predefined information the type of described compress coding data is a significant data, then described data block and the check block that obtains through error correction coding are encapsulated transmission; Otherwise, trigger described interleave unit and carry out interleaving treatment, and encapsulate transmission by sending the data block and the check block of processing unit after to interleaving treatment to described data block with through the check block that error correction coding obtains.
16. system that realizes that video data transmits, it is characterized in that, comprise device and the video data receiving system of realizing that video data transmits, and described video data receiving system is arranged at receiving terminal, be used to receive one group of packet of batch of video data correspondence that device that described realization video data transmits sends, from described one group of packet, extract data block and the check blocks of many groups, comprise several number according to the block sum check piece in every group through interweaving; Afterwards, described multi-group data block sum check piece is united the processing that deinterleaves, obtain a plurality of extension blocks groups, detect judgement for each extension blocks group then, and according to detecting judged result, determine to carry out or do not carry out error correction decoding and handle, obtain the data block after a plurality of processing; At last, the data after described a plurality of processing are carried out compression coding handle, obtain the video data of reconstruct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610140581 CN101166273A (en) | 2006-10-16 | 2006-10-16 | Method, device and system for transmitting video data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610140581 CN101166273A (en) | 2006-10-16 | 2006-10-16 | Method, device and system for transmitting video data |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101166273A true CN101166273A (en) | 2008-04-23 |
Family
ID=39334708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610140581 Pending CN101166273A (en) | 2006-10-16 | 2006-10-16 | Method, device and system for transmitting video data |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101166273A (en) |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098500A (en) * | 2011-03-02 | 2011-06-15 | 天津大学 | Error collecting method for improving transmission performance of eight-view auto-stereoscopic video network |
| CN102164286A (en) * | 2011-05-27 | 2011-08-24 | 天津大学 | Method for hiding transmission error of eight-viewpoint free three-dimensional video |
| CN102186052A (en) * | 2011-03-11 | 2011-09-14 | 北京交通大学 | Partitioned information transmission-based intelligent high-speed railway video monitoring method and system |
| CN102186088A (en) * | 2011-05-04 | 2011-09-14 | 苏州两江科技有限公司 | Wireless sensor network (WSN) video transmission method based on interleave technology and secondary error-correction fusion |
| CN102763424A (en) * | 2010-02-19 | 2012-10-31 | 三星电子株式会社 | Method and apparatus for transmitting video content compressed by codec |
| CN101938606B (en) * | 2009-07-03 | 2012-12-26 | 北京大学 | Method, system and device for propelling multimedia data |
| CN103152126A (en) * | 2012-04-06 | 2013-06-12 | 中国科学技术大学 | Data packaging method and device based on forward error correction protection codes |
| CN103327085A (en) * | 2013-06-05 | 2013-09-25 | 深圳市中博科创信息技术有限公司 | Distributed data processing method, data center and distributed data system |
| CN103621066A (en) * | 2011-04-27 | 2014-03-05 | 日立麦克赛尔株式会社 | Image receiving device and image receiving method |
| CN105933342A (en) * | 2016-06-24 | 2016-09-07 | 浙江宇视科技有限公司 | Video monitoring data transmission method and device |
| CN106230548A (en) * | 2016-06-14 | 2016-12-14 | 青岛乾元通数码科技有限公司 | A kind of encoding and decoding error correction method and system |
| WO2017000836A1 (en) * | 2015-06-29 | 2017-01-05 | 华为技术有限公司 | Message transmission method and device |
| CN107852278A (en) * | 2015-08-05 | 2018-03-27 | 微软技术许可有限责任公司 | Intertexture media data information |
| CN109600616A (en) * | 2018-11-27 | 2019-04-09 | 西安汇明科技发展有限责任公司 | A kind of code stream packaging method based on H.264 video compression standard |
| CN109873683A (en) * | 2017-12-01 | 2019-06-11 | 华为技术有限公司 | Data editing interpretation method and device, OLT, ONU and PON system |
| CN110114993A (en) * | 2016-10-24 | 2019-08-09 | 弗劳恩霍夫应用研究促进协会 | For transmitting the intertexture and decoding in succession of the telegram of the attached bag with variable number |
| CN110391871A (en) * | 2018-04-19 | 2019-10-29 | 华为技术有限公司 | Data editing interpretation method and device, OLT, ONU and PON system |
| WO2020088211A1 (en) * | 2018-10-31 | 2020-05-07 | 华为技术有限公司 | Data compression method and related apparatus, and data decompression method and related apparatus |
| CN111385060A (en) * | 2018-12-28 | 2020-07-07 | 广州市百果园信息技术有限公司 | Data transmission method, device, equipment and storage medium |
| CN111600677A (en) * | 2019-02-20 | 2020-08-28 | 成都华为技术有限公司 | Data transmission method and device |
| CN112333470A (en) * | 2020-10-27 | 2021-02-05 | 杭州叙简科技股份有限公司 | FEC (forward error correction) system based on video frame |
| CN113760186A (en) * | 2019-07-30 | 2021-12-07 | 华为技术有限公司 | Data storage method and device, computing equipment, storage system and storage medium |
| WO2023108600A1 (en) * | 2021-12-17 | 2023-06-22 | Intel Corporation | System, method and apparatus for reducing power consumption of error correction coding using compacted data blocks |
| CN116610272A (en) * | 2023-04-23 | 2023-08-18 | 珠海芯烨电子科技有限公司 | Processing method and system for picture data of printing terminal |
-
2006
- 2006-10-16 CN CN 200610140581 patent/CN101166273A/en active Pending
Cited By (42)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938606B (en) * | 2009-07-03 | 2012-12-26 | 北京大学 | Method, system and device for propelling multimedia data |
| US9866921B2 (en) | 2010-02-19 | 2018-01-09 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting video content compressed by codec |
| CN102763424B (en) * | 2010-02-19 | 2018-10-09 | 三星电子株式会社 | It sends by the method and apparatus of the video content of compressed with codecs |
| CN102763424A (en) * | 2010-02-19 | 2012-10-31 | 三星电子株式会社 | Method and apparatus for transmitting video content compressed by codec |
| CN102098500A (en) * | 2011-03-02 | 2011-06-15 | 天津大学 | Error collecting method for improving transmission performance of eight-view auto-stereoscopic video network |
| CN102186052A (en) * | 2011-03-11 | 2011-09-14 | 北京交通大学 | Partitioned information transmission-based intelligent high-speed railway video monitoring method and system |
| CN103621066A (en) * | 2011-04-27 | 2014-03-05 | 日立麦克赛尔株式会社 | Image receiving device and image receiving method |
| CN102186088A (en) * | 2011-05-04 | 2011-09-14 | 苏州两江科技有限公司 | Wireless sensor network (WSN) video transmission method based on interleave technology and secondary error-correction fusion |
| CN102164286B (en) * | 2011-05-27 | 2012-09-26 | 天津大学 | Method for hiding transmission error of eight-viewpoint free three-dimensional video |
| CN102164286A (en) * | 2011-05-27 | 2011-08-24 | 天津大学 | Method for hiding transmission error of eight-viewpoint free three-dimensional video |
| CN103152126A (en) * | 2012-04-06 | 2013-06-12 | 中国科学技术大学 | Data packaging method and device based on forward error correction protection codes |
| CN103152126B (en) * | 2012-04-06 | 2015-04-22 | 中国科学技术大学 | Data packaging method and device based on forward error correction protection codes |
| CN103327085A (en) * | 2013-06-05 | 2013-09-25 | 深圳市中博科创信息技术有限公司 | Distributed data processing method, data center and distributed data system |
| CN103327085B (en) * | 2013-06-05 | 2017-02-08 | 深圳市中博科创信息技术有限公司 | Distributed data processing method, data center and distributed data system |
| CN111541514B (en) * | 2015-06-29 | 2021-10-26 | 华为技术有限公司 | Message transmission method and device |
| CN111541514A (en) * | 2015-06-29 | 2020-08-14 | 华为技术有限公司 | Message transmission method and device |
| WO2017000836A1 (en) * | 2015-06-29 | 2017-01-05 | 华为技术有限公司 | Message transmission method and device |
| CN106330713B (en) * | 2015-06-29 | 2020-04-14 | 华为技术有限公司 | Message transmission method and device |
| CN106330713A (en) * | 2015-06-29 | 2017-01-11 | 华为技术有限公司 | Message transmission method and device |
| CN107852278A (en) * | 2015-08-05 | 2018-03-27 | 微软技术许可有限责任公司 | Intertexture media data information |
| CN107852278B (en) * | 2015-08-05 | 2021-02-26 | 微软技术许可有限责任公司 | Interleaving media data information |
| CN106230548A (en) * | 2016-06-14 | 2016-12-14 | 青岛乾元通数码科技有限公司 | A kind of encoding and decoding error correction method and system |
| CN105933342A (en) * | 2016-06-24 | 2016-09-07 | 浙江宇视科技有限公司 | Video monitoring data transmission method and device |
| US11483028B2 (en) | 2016-10-24 | 2022-10-25 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Interleaving for the transfer of telegrams with a variable number of sub-packets and successive decoding |
| CN110114993B (en) * | 2016-10-24 | 2022-01-21 | 弗劳恩霍夫应用研究促进协会 | Interleaving and sequential decoding for transmitting telegrams with variable number of sub-packets |
| CN110114993A (en) * | 2016-10-24 | 2019-08-09 | 弗劳恩霍夫应用研究促进协会 | For transmitting the intertexture and decoding in succession of the telegram of the attached bag with variable number |
| CN109873683A (en) * | 2017-12-01 | 2019-06-11 | 华为技术有限公司 | Data editing interpretation method and device, OLT, ONU and PON system |
| CN109873683B (en) * | 2017-12-01 | 2023-06-06 | 华为技术有限公司 | Data coding and decoding method and device, OLT, ONU and PON system |
| CN110391871A (en) * | 2018-04-19 | 2019-10-29 | 华为技术有限公司 | Data editing interpretation method and device, OLT, ONU and PON system |
| WO2020088211A1 (en) * | 2018-10-31 | 2020-05-07 | 华为技术有限公司 | Data compression method and related apparatus, and data decompression method and related apparatus |
| US11411577B2 (en) | 2018-10-31 | 2022-08-09 | Huawei Technologies Co., Ltd. | Data compression method, data decompression method, and related apparatus |
| CN109600616B (en) * | 2018-11-27 | 2022-11-04 | 西安汇明科技发展有限责任公司 | Code stream packaging method based on H.264 video compression standard |
| CN109600616A (en) * | 2018-11-27 | 2019-04-09 | 西安汇明科技发展有限责任公司 | A kind of code stream packaging method based on H.264 video compression standard |
| CN111385060A (en) * | 2018-12-28 | 2020-07-07 | 广州市百果园信息技术有限公司 | Data transmission method, device, equipment and storage medium |
| CN111385060B (en) * | 2018-12-28 | 2023-03-28 | 广州市百果园信息技术有限公司 | Data transmission method, device, equipment and storage medium |
| CN111600677A (en) * | 2019-02-20 | 2020-08-28 | 成都华为技术有限公司 | Data transmission method and device |
| CN111600677B (en) * | 2019-02-20 | 2022-04-12 | 成都华为技术有限公司 | Data transmission method and device |
| CN113760186A (en) * | 2019-07-30 | 2021-12-07 | 华为技术有限公司 | Data storage method and device, computing equipment, storage system and storage medium |
| 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 |
| CN112333470A (en) * | 2020-10-27 | 2021-02-05 | 杭州叙简科技股份有限公司 | FEC (forward error correction) system based on video frame |
| WO2023108600A1 (en) * | 2021-12-17 | 2023-06-22 | Intel Corporation | System, method and apparatus for reducing power consumption of error correction coding using compacted data blocks |
| CN116610272A (en) * | 2023-04-23 | 2023-08-18 | 珠海芯烨电子科技有限公司 | Processing method and system for picture data of printing terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101166273A (en) | Method, device and system for transmitting video data | |
| CN102143367B (en) | Method, device and system for checking error correction | |
| CN100450187C (en) | Multimedia data network realtime transfer method for supporting error elasticity | |
| EP2766995B1 (en) | Encoding apparatus and encoding method in data communication system | |
| CN100466725C (en) | Multimedia communication method and terminal thereof | |
| KR102133930B1 (en) | Apparatus and method for transmitting and receiving data packet | |
| US8990663B2 (en) | Method to support forward error correction for real-time audio and video data over internet protocol networks | |
| CA2646870C (en) | Method for protecting multimedia data using additional network abstraction layers (nal) | |
| KR101933465B1 (en) | Apparatus and method for transmitting/receiving a packet in a mobile communication system | |
| US8037397B2 (en) | Method for recovering a lost data unit | |
| CN101834700A (en) | Unidirectional reliable transmission method and transceiving device based on data packets | |
| US7039837B2 (en) | Signal coding | |
| KR101983032B1 (en) | Apparatus and method for transmitting and receiving packet in broadcasting and communication system | |
| CN103650432A (en) | Method for generating forward error correction packet in multimedia system and method and apparatus for transmitting and receiving forward error correction packet | |
| CN1845611A (en) | Video transmission protection method based on H.264 | |
| CN1360775A (en) | Method and apparatus for transmitting and receiving multimedia data | |
| CN101102282A (en) | A transmission and receiving method for data broadcast service | |
| WO2006111063A1 (en) | A method for protecting data transmitting based on erasure codes | |
| CN1611027A (en) | Unequal error protection using forward error correction based on reed-Solomon codes | |
| CN111935485A (en) | RS code forward error correction method and device | |
| US20130283132A1 (en) | Apparatus and method for transmitting/receiving packet in communication system | |
| US20160352465A1 (en) | Apparatus and method for transmitting and receiving forward error correction packet | |
| JP3457335B2 (en) | Error protection method and error protection device | |
| CN112422235B (en) | Network packet loss recovery method based on redundancy algorithm | |
| KR101874116B1 (en) | Encoding method and apparatus of forward error correction in a multimedia system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080423 |