CN101072083A - Method for optimizing network data transmission redundancy error correction rate - Google Patents
Method for optimizing network data transmission redundancy error correction rate Download PDFInfo
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- CN101072083A CN101072083A CNA2007100747077A CN200710074707A CN101072083A CN 101072083 A CN101072083 A CN 101072083A CN A2007100747077 A CNA2007100747077 A CN A2007100747077A CN 200710074707 A CN200710074707 A CN 200710074707A CN 101072083 A CN101072083 A CN 101072083A
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Abstract
The method includes following steps: (1) detecting whether transmission line is stable; (2) if transmission line is stable, then reducing redundancy; otherwise, increasing redundancy. Based on importance of information, the method determines forward error correction rate suitable to line dynamically, raises transmission speed, and makes application with high requirement on bandwidth possible to be realized on lower bandwidth.
Description
Technical field
The present invention relates to the communication technology, more particularly, relate to a kind of transmission method of optimizing network data transmission redundancy error correction rate.
Background technology
Forward error correction (Forward Error Correction is called for short FEC) is a very important anti-tampering algorithm.Adopting forward error recovery FEC method, is in order to reduce the error rate of digital signal, to improve the reliability of signal transmission.Its cardinal principle is to utilize convolution algorithm, in the transmission bag that sends, add redundant coded information, it is wrong or when losing that receiving terminal detects reception information, by calculating, determine the position of mistake, and recovered automatically, according to the stability of different line signals, can select different forward error correction rates, the ratio that corresponding redundancy occupies is also just different.FEC redundant code ratio (being redundancy) is high more, and then the ability of error correction is high more.Redundancy is meant the ratio of redundant code in whole transmission bag that is transmitted, and redundancy is big more, and the ratio that effective information takies is more little, and transfer rate is just more little.
The general redundancy of fixing of using is transmitted in the prior art, promptly transmit the redundancy that the two ends agreement is determined well, the sender produces corresponding redundant code with this ratio and transmits, and the recipient receives and handle the data of receiving according to this ratio, does not comprise redundancy in the data of transmission.
Because prior art has adopted fixing redundancy, when circuit was stablized, if redundancy is set higherly, the utilance of circuit was bad; When circuit was unstable, if redundancy is set lowlyer, signal transmitted and does not reach the purpose that good error correction recovers.In addition, use higher redundancy under the unsettled situation of circuit, the transfer rate of corresponding effective information has just reduced, and for example needs big transfer rate to realize function corresponding under the situation such as video transmission in actual use.
Summary of the invention
The technical problem to be solved in the present invention is, can not carry out the problem of accommodation according to the stable case of circuit at redundancy fixing in the prior art, and a kind of transmission method of dynamic adjustment redundancy error correction rate is provided.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of transmission method of dynamic adjustment redundancy error correction rate, comprise the following steps:
Whether a, detected transmission circuit are stablized;
B, stable as if transmission line then reduces redundancy; Otherwise increase redundancy.
In transmission method of the present invention, among the described step a, according to the rtcp protocol in the RTP transmission, dynamically obtain the packet loss statistics of circuit, and dynamically adjust best error correction rate according to this statistics, its formula of taking is:
J=D+N, wherein J is an error correction rate, and D is an average packet loss ratio, and N is redundant constant, and N＞(T-D)/2, wherein T is maximum packet loss.
In transmission method of the present invention, among the described step b, when needing bigger transfer rate, then carry out the following step at the transmission line instability:
C, the information that needs are transmitted are analyzed, and are judged the severity level of described information;
At non-important information, when transmitting, use less redundancy; At important information, when transmitting, use bigger redundancy.
In transmission method of the present invention, if in Internet video is used, then described step c comprises:
C1, the coded message that needs are transmitted are analyzed, and by the analysis to the video flowing structure;
C2, use bigger redundancy to encode, can adopt less redundancy to encode for predictive frame for key frame;
C3, set up the optimized Algorithm that is used for distribution network bandwidth resources between video source data and FEC data.
In transmission method of the present invention, if in video call is used, then the transmission relative importance value according to voice uses bigger redundancy, and image is then used less redundancy.
In transmission method of the present invention, if in the image priority application of image demonstration of picture control, band background music, then the transmission relative importance value according to image uses bigger redundancy, voice is then used the mode of less redundancy.
Implement the transmission method of dynamic adjustment redundancy error correction rate of the present invention, can dynamically determine to be fit to the forward error correction rate of circuit, can improve transmission speed, make and on lower bandwidth, realize the higher application of bandwidth requirement according to the severity level of information.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the flow chart of the transmission method of dynamic adjustment redundancy error correction rate of the present invention.
Embodiment
As shown in Figure 1, in the preferred embodiment of the present invention, a kind of transmission method of dynamic adjustment redundancy error correction rate comprises the following steps:
Step S100: commencing signal circuit transmission.Internet video use be subjected to data-bag lost or mistake and network bandwidth resources deficiency through regular meeting interference in order to guarantee video quality, can adopt redundancy to improve reliability of video data transmission; Simultaneously, in order to adapt to the variation of network state, transmitting terminal can be regulated the transmission rate of video data, and between video source data and FEC data reasonable distribution Network Transmission bandwidth.
Step S105: settling mode of the present invention is the stable case of detection line in the process that transmits.Dynamically take different redundancys by the stable case of detection line.Than fixedly redundancy of the prior art, the present invention can improve transmission speed.
In order to judge whether circuit is stable, thereby reach best error correction rate, the present invention has taked a kind of selectable process mode: utilize RTP (Real-time Transport Protocol, be called for short RTP): (the Real-time Transport Control Protocol of the RTCP Real-time Transport Control Protocol in the transmission, be called for short RTCP), dynamically obtain the packet loss statistical conditions of circuit, adjust best error correction rate according to this Data Dynamic.This formula is: J=D+N (wherein, J is an error correction rate, and D is a packet loss, and N is redundant constant).General network packet loss rate is comparatively stable at 5% network line, and surpassing 5% this value network line transmission will be comparatively unstable.Because transmission is transmitted on rtcp protocol, RTCP carries out on the application layer, and the error correction rate when therefore transmitting determines it is control unit in the transmission end, and control unit can obtain packet loss.
Step S110: stablize this situation at circuit, can take to reduce this mode of redundancy, thereby can improve transfer rate.
Step S115, S120, S125, S130: generally speaking,, thereby make the redundancy of circuit always be on the best transfer rate of effective information if the circuit instability then takes to increase this mode of redundancy.But, unstable and when needing big transfer rate at circuit in some cases, then the information that needs are transmitted is analyzed, and judging which information and be important and needing the big information of error correction degree, which information is the information that the whole application of some information can be born of losing of assisting.
Step S135, S140:, when transmitting, use less redundancy at non-important information; At important information, when transmitting, use bigger redundancy.Thereby realize dynamically determining the redundancy of suitable circuit.Below be the present invention dynamically adjusts redundancy error correction rate according to the severity level of information example:
1, in video transmits, FEC algorithm and decoding error concealment technology are combined, be exactly in transmission at the importance difference of video information coding frame, dynamically adjust redundancy.
The first-selected coded message that needs are transmitted is analyzed, and by the analysis to the video flowing structure, has proposed a kind of decoding model of frame on the basis that takes into full account dependence between the frame and frame type.Use bigger redundancy to encode for key frame (being commonly referred to as the I frame), can adopt less redundancy to encode for predictive frame (being commonly referred to as S frame and P frame etc.).
On this basis, set up the optimized Algorithm that is used for distribution network bandwidth resources between video source data and FEC data.For video decode, key frame has been saved the image coding information of largest portion from damage, therefore guarantee that as much as possible key frame can correctly arrive, even lost some predictive frame information, also can in decoding, do corresponding prediction and recover the information of losing, realize error concealment according to the information of key frame and other arrival frame; Even the information that has some to lose is not recovered, owing to be not key message, less to the visual experience influential effect that is used for.
Can be implemented in the efficient application requirements that transmits video data in the unsettled Network Transmission environment of circuit so preferably, also can adapt to simultaneously the variation of network state effectively, but and make receiving terminal obtain maximum play frame rate by the optimized distribution network bandwidth resources.
2, owing to the transmission relative importance value of voice in video call is higher, therefore can use less redundancy according to the transmission relative importance value of these voice, then use bigger redundancy to image.Like this, even the circuit instability can guarantee that still the continuous dialogue of sound is still within the scope that the user accepts.
3, in the preferential application of some image, for example picture control perhaps with the image demonstration of background music etc., can be used bigger redundancy during these are used according to the transmission relative importance value of image, then use the mode of less redundancy to voice.
Therefore, adopt different redundancys, make and on lower bandwidth, realize the higher application of bandwidth requirement at different priority.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (6)
1, a kind of method of optimizing network data transmission redundancy error correction rate is characterized in that comprising the following steps:
Whether a, detected transmission circuit are stablized;
B, stable as if transmission line then reduces redundancy; Otherwise increase redundancy.
2, the method for optimization network data transmission redundancy error correction rate according to claim 1, it is characterized in that, among the described step a, according to the rtcp protocol in the RTP transmission, dynamically obtain the packet loss statistics of circuit, and dynamically adjust best error correction rate according to this statistics, its formula of taking is:
J=D+N, wherein J is an error correction rate, and D is an average packet loss ratio, and N is redundant constant, and N＞(T-D)/2, wherein T is maximum packet loss.
3, the method for optimization network data transmission redundancy error correction rate according to claim 1 and 2 is characterized in that, among the described step b, when needing bigger transfer rate at the transmission line instability, then carries out the following step:
C, the information that needs are transmitted are analyzed, and are judged the severity level of described information;
At non-important information, when transmitting, use less redundancy; At important information, when transmitting, use bigger redundancy.
4, the method for optimization network data transmission redundancy error correction rate according to claim 3 is characterized in that, if in Internet video is used, then described step c comprises:
C1, the coded message that needs are transmitted are analyzed, and by the analysis to the video flowing structure;
C2, use bigger redundancy to encode, can adopt less redundancy to encode for predictive frame for key frame;
C3, set up the optimized Algorithm that is used for distribution network bandwidth resources between video source data and FEC data.
5, the method for optimization network data transmission redundancy error correction rate according to claim 3 is characterized in that, if in video call is used, then the transmission relative importance value according to voice uses bigger redundancy, and image is then used less redundancy.
6, the method for optimization network data transmission redundancy error correction rate according to claim 3, it is characterized in that, if in the image priority application of image demonstration of picture control, band background music, then the transmission relative importance value according to image uses bigger redundancy, voice is then used the mode of less redundancy.
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| CN102036061B (en) * | 2009-09-30 | 2012-11-21 | 华为技术有限公司 | Video data transmission and sending processing method, device and network system |
| CN102143367B (en) * | 2010-01-30 | 2013-01-30 | 华为技术有限公司 | Method, device and system for checking error correction |
| CN103632671A (en) * | 2013-06-28 | 2014-03-12 | 华为软件技术有限公司 | Data encoding method, data decoding method, data encoding device, data decoding device and data communication system |
| CN101854224B (en) * | 2009-04-01 | 2014-06-04 | 华为技术有限公司 | Error correcting coding method, device and system, and forwarding control method and device |
| CN103929265A (en) * | 2013-01-14 | 2014-07-16 | 北京邮电大学 | Communication forward error correction method and device |
| CN104040622A (en) * | 2012-01-12 | 2014-09-10 | 高通股份有限公司 | Systems, methods, apparatus, and computer-readable media for criticality threshold control |
| CN104620525A (en) * | 2012-07-09 | 2015-05-13 | 瑞典爱立信有限公司 | Method and arrangement for distributing information during broadcast delivery |
| CN105656774A (en) * | 2016-01-12 | 2016-06-08 | 东北大学 | Multipath hybrid redundant transmission method for real-time network video session media data |
| CN105871514A (en) * | 2016-05-19 | 2016-08-17 | 乐视控股（北京）有限公司 | Data transmission method and data transmission device |
| CN106656422A (en) * | 2017-01-03 | 2017-05-10 | 珠海全志科技股份有限公司 | Streaming media transmission method capable of dynamically regulating redundancy of FEC (Forward Error Correction) |
| CN109525458A (en) * | 2018-11-20 | 2019-03-26 | 网易（杭州）网络有限公司 | Data transmission method, device, medium and electronic equipment |
| CN112821992A (en) * | 2021-01-08 | 2021-05-18 | 百果园技术(新加坡)有限公司 | Data transmission method and device, electronic equipment and storage medium |
| WO2021103778A1 (en) * | 2019-11-27 | 2021-06-03 | 腾讯科技（深圳）有限公司 | Voice processing method and apparatus, computer-readable storage medium and computer device |
| CN114448569A (en) * | 2022-01-27 | 2022-05-06 | 阿里巴巴（中国）有限公司 | Data transmission method, device and computer storage medium |
| CN114554136A (en) * | 2022-04-25 | 2022-05-27 | 浙江华创视讯科技有限公司 | Video conference realization method, multipoint control unit, device and readable storage medium |
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- 2007-06-04 CN CNA2007100747077A patent/CN101072083A/en active Pending
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| CN101854224B (en) * | 2009-04-01 | 2014-06-04 | 华为技术有限公司 | Error correcting coding method, device and system, and forwarding control method and device |
| US9215498B2 (en) | 2009-09-30 | 2015-12-15 | Huawei Technologies Co., Ltd. | Video data transmission processing method, video data sending processing method, apparatus, network system |
| CN102036061B (en) * | 2009-09-30 | 2012-11-21 | 华为技术有限公司 | Video data transmission and sending processing method, device and network system |
| CN102143367B (en) * | 2010-01-30 | 2013-01-30 | 华为技术有限公司 | Method, device and system for checking error correction |
| US9246630B2 (en) | 2010-01-30 | 2016-01-26 | Huawei Technologies Co., Ltd. | Method, device, and system for forward error correction |
| CN104040622B (en) * | 2012-01-12 | 2017-08-11 | 高通股份有限公司 | System, method, equipment and the computer-readable media controlled for key threshold value |
| CN104040622A (en) * | 2012-01-12 | 2014-09-10 | 高通股份有限公司 | Systems, methods, apparatus, and computer-readable media for criticality threshold control |
| CN104620525A (en) * | 2012-07-09 | 2015-05-13 | 瑞典爱立信有限公司 | Method and arrangement for distributing information during broadcast delivery |
| CN103929265A (en) * | 2013-01-14 | 2014-07-16 | 北京邮电大学 | Communication forward error correction method and device |
| CN103632671A (en) * | 2013-06-28 | 2014-03-12 | 华为软件技术有限公司 | Data encoding method, data decoding method, data encoding device, data decoding device and data communication system |
| CN105656774A (en) * | 2016-01-12 | 2016-06-08 | 东北大学 | Multipath hybrid redundant transmission method for real-time network video session media data |
| CN105656774B (en) * | 2016-01-12 | 2018-10-23 | 东北大学 | A kind of network real-time video conversation media data multipath hybrid redundancy transmission method |
| CN105871514A (en) * | 2016-05-19 | 2016-08-17 | 乐视控股（北京）有限公司 | Data transmission method and data transmission device |
| CN106656422A (en) * | 2017-01-03 | 2017-05-10 | 珠海全志科技股份有限公司 | Streaming media transmission method capable of dynamically regulating redundancy of FEC (Forward Error Correction) |
| CN106656422B (en) * | 2017-01-03 | 2019-12-24 | 珠海全志科技股份有限公司 | Streaming media transmission method for dynamically adjusting FEC redundancy |
| CN109525458A (en) * | 2018-11-20 | 2019-03-26 | 网易（杭州）网络有限公司 | Data transmission method, device, medium and electronic equipment |
| WO2021103778A1 (en) * | 2019-11-27 | 2021-06-03 | 腾讯科技（深圳）有限公司 | Voice processing method and apparatus, computer-readable storage medium and computer device |
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| CN112821992A (en) * | 2021-01-08 | 2021-05-18 | 百果园技术(新加坡)有限公司 | Data transmission method and device, electronic equipment and storage medium |
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| CN114554136A (en) * | 2022-04-25 | 2022-05-27 | 浙江华创视讯科技有限公司 | Video conference realization method, multipoint control unit, device and readable storage medium |
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