CN102149005A - Self-adaptive method for controlling network video quality - Google Patents
Self-adaptive method for controlling network video quality Download PDFInfo
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Abstract
The invention relates to a network technology, which solves the problems of image frame loss and/or smearing and/or jiggling and/or long cache time of a current website during video transmission due to different or unstable bandwidths, and provides a self-adaptive method for controlling network video quality. The technical scheme of the self-adaptive method can be summarized as follows: at least two video sources of different code rates and definitions are provided in a service; and the sources are selected and switched by a client according to the detected network bandwidth. The self-adaptive method for controlling the network video quality has the beneficial effects that the self-adaptive method for controlling the network video quality is convenient for users, and is suitable for transmitting network video sources.
Description
Technical field
The present invention relates to network technology, particularly the technology of Network Transmission.
Background technology
Development along with the network broadband technology, various video website are emerged in large numbers like the mushrooms after rain, yet traditional website video transmission technologies---the same video of transmission unified resolution, can not satisfy user's demand, at first, the user of heterogeneous networks bandwidth and different terminals is also different to the requirement of video resolution, secondly, because the fluctuation and the unsteadiness of bandwidth, under the prerequisite of fixed video picture frame frequency and resolution, the user is good in network condition, and when its available bandwidth was higher, the video smoothness of broadcast was clear, and in the network condition variation, during the available bandwidth step-down, then due picture frame frequency can't be guaranteed, the frame losing of image can be caused, phenomenon such as smear and shake, once more, can normally watch under the situation of video satisfying band-limited user, the higher user of bandwidth then can't make full use of the service that its bandwidth resources are enjoyed respective quality, causes the wasting of resources.Video resource on some video website has been distinguished high definition and plaintext now, but but need user oneself to go to select, and will play down after selecting always, when changing, the network bandwidth also need user oneself to go to reselect and cushion, cumbersome, in addition, owing to having only two kinds of high definition and plaintexts, it selects also not enough diversity, can not satisfy all user's needs.
Summary of the invention
When the objective of the invention is to overcome the current web video transmission because bandwidth is different or unsettled reason be prone to the frame losing of image and/or smear and/or shake and/or buffer time oversize shortcoming, a kind of method of adaptive bandwidth Control Network video quality is provided.
The present invention solves its technical problem, and the technical scheme of employing is that the method for adaptive bandwidth Control Network video quality is characterized in that, may further comprise the steps:
A. server end is stored the video film source of at least two kinds of different code check definition, and stores its relevant information;
B. user's program request need video the time, client is selected the resolution of respective service grade automatically, is linked to corresponding broadcast address and plays;
C. client detected network condition constantly before this video playback finished, and judged whether the network bandwidth reduces, if then enter the d step, if not then enter the e step;
D. if be the lowest service level of server end this moment, then do not handle, if not the lowest service level of server end recording played time then, and the announcement server end reduces a grade of service, selects the resolution of corresponding grade automatically, finds corresponding broadcast address, the Switch Video film source, reproduction time by record is searched corresponding key frame, uses the video film source after switching to begin to play, and gets back to the c step;
E. if be the highest grade of service of server end this moment, then do not handle, if not the highest grade of service of server end then client supposition promote a grade of service, search corresponding resolution, calculate the required network bandwidth, judge whether this network bandwidth exceeds current available bandwidth, do not get back to the c step, if not then enter the f step if then do not handle;
F. recording played time, and the announcement server end promotes a grade of service, automatically select the resolution of corresponding grade, find corresponding broadcast address, the Switch Video film source, reproduction time by record is searched corresponding key frame, uses the video film source after switching to begin to play, and gets back to the c step.
Concrete, the described corresponding information of step a comprises the corresponding resolution of video film source and the broadcast address information of these at least two kinds different code check definition.
Further, described step c may further comprise the steps:
C1. client by the transmission of test packet between server end and client, according to the network bandwidth between response message statistical server end and the client, and is got its mean value as final fixed bandwidth within a certain period of time;
C2. fixed bandwidth and this fixed bandwidth in the last certain hour compared, judge whether the current network bandwidth reduces, if then enter the d step, if not then enter the e step.
Concrete, described certain hour is 20 seconds.
Further again, described step e may further comprise the steps:
E1. the client supposition promotes a grade of service, searches corresponding resolution, calculates the required network bandwidth;
E2. calculate the required network bandwidth according to this, under the prerequisite of fixing message size, calculate corresponding message transmitting spped rate, and send one group of message with this speed;
E3. server end feeds back to client according to the message that receives, client is according to the packet loss of this message of detection feedback, whether the packet loss of judging this message according to the message packet loss threshold values that is provided with surpasses this threshold values, does not get back to the c step if then do not handle, if not then enter the f step.
Concrete, described message packet loss threshold values is 2%.
The invention has the beneficial effects as follows, method by above-mentioned adaptive bandwidth Control Network video quality, client can be selected the video film source of corresponding resolution automatically according to the network bandwidth between client and the server end, satisfy user's needs, and when changing in the bandwidth instability, automatically select the screen film source of corresponding resolution to continue to play, make things convenient for the user.
Embodiment
Below in conjunction with embodiment, describe technical scheme of the present invention in detail.
The method of adaptive bandwidth Control Network video quality of the present invention is: at first server end is stored the video film source of at least two kinds of different code check definition, and store its relevant information, when video that user's program request needs, client is selected the resolution of respective service grade automatically, being linked to corresponding broadcast address plays, client detects network condition constantly then, judge whether the network bandwidth reduces, if reducing, bandwidth judges then whether is the lowest service level of server end this moment, if then do not handle, if not the lowest service level of server end recording played time then, and the announcement server end reduces a grade of service, automatically select the resolution of corresponding grade, find corresponding broadcast address, the Switch Video film source, reproduction time by record is searched corresponding key frame, use the video film source after switching to begin to play, get back to client and detect that step of network condition, if bandwidth maintains an equal level or improves and judge then whether is the highest grade of service of server end this moment, if then do not handle, if not the highest grade of service of server end then client supposition promote a grade of service, search corresponding resolution, calculate the required network bandwidth, judge whether this network bandwidth exceeds current available bandwidth, do not get back to client detection that step of network condition if then do not handle, if not recording played time then, and the announcement server end promotes a grade of service, automatically select the resolution of corresponding grade, find corresponding broadcast address, the Switch Video film source, reproduction time by record is searched corresponding key frame, use the video film source after switching to begin to play, get back to client and detect that step of network condition, finish up to this video playback.
Embodiment
This routine network bandwidth is tested by the form of detection messages.
At first server end is stored the video film source of at least two kinds of different code check definition, and store its relevant information, this relevant information comprises its corresponding resolution and broadcast address information, when video that user's program request needs, client is selected the resolution of respective service grade automatically, being linked to corresponding broadcast address plays, client within a certain period of time then, by the transmission of test packet between server end and client, according to the network bandwidth between response message statistical server end and the client, and get its mean value as final fixed bandwidth, bandwidth fixed in the last certain hour and this fixed bandwidth are compared, the certain hour here can be 20 seconds (promptly being the whole video reproduction time to be divided into a plurality of certain hours handle), judge whether the current network bandwidth reduces, if reducing, bandwidth judges then whether is the lowest service level of server end this moment, if then do not handle, if not the lowest service level of server end recording played time then, and the announcement server end reduces a grade of service, automatically select the resolution of corresponding grade, find corresponding broadcast address, the Switch Video film source, reproduction time by record is searched corresponding key frame, use the video film source after switching to begin to play, get back to client and detect that step of network condition, if bandwidth maintains an equal level or improves and judge then whether is the highest grade of service of server end this moment, if then do not handle, if not the highest grade of service of server end then client supposition promote a grade of service, search corresponding resolution, calculate the required network bandwidth, calculate the required network bandwidth according to this, under the prerequisite of fixing message size, calculate corresponding message transmitting spped rate, and send one group of message with this speed, server end feeds back to client according to the message that receives, client is according to the packet loss of this message of detection feedback, whether the packet loss of judging this message according to the message packet loss threshold values that is provided with surpasses this threshold values, this message packet loss threshold values can be 2%, do not get back to client detection that step of network condition if then do not handle, if not recording played time then, and the announcement server end promotes a grade of service, automatically select the resolution of corresponding grade, find corresponding broadcast address, the Switch Video film source, reproduction time by record is searched corresponding key frame, use the video film source after switching to begin to play, get back to client and detect that step of network condition, finish up to this video playback.
Claims (6)
1. the method for adaptive bandwidth Control Network video quality is characterized in that, may further comprise the steps:
A. server end is stored the video film source of at least two kinds of different code check definition, and stores its relevant information;
B. user's program request need video the time, client is selected the resolution of respective service grade automatically, is linked to corresponding broadcast address and plays;
C. client detected network condition constantly before this video playback finished, and judged whether the network bandwidth reduces, if then enter the d step, if not then enter the e step;
D. if be the lowest service level of server end this moment, then do not handle, if not the lowest service level of server end recording played time then, and the announcement server end reduces a grade of service, selects the resolution of corresponding grade automatically, finds corresponding broadcast address, the Switch Video film source, reproduction time by record is searched corresponding key frame, uses the video film source after switching to begin to play, and gets back to the c step;
E. if be the highest grade of service of server end this moment, then do not handle, if not the highest grade of service of server end then client supposition promote a grade of service, search corresponding resolution, calculate the required network bandwidth, judge whether this network bandwidth exceeds current available bandwidth, do not get back to the c step, if not then enter the f step if then do not handle;
F. recording played time, and the announcement server end promotes a grade of service, automatically select the resolution of corresponding grade, find corresponding broadcast address, the Switch Video film source, reproduction time by record is searched corresponding key frame, uses the video film source after switching to begin to play, and gets back to the c step.
2. according to the method for the described adaptive bandwidth Control Network of claim 1 video quality, it is characterized in that the described corresponding information of step a comprises the corresponding resolution of video film source and the broadcast address information of these at least two kinds different code check definition.
3. according to the method for claim 1 or 2 described adaptive bandwidth Control Network video qualities, it is characterized in that described step c may further comprise the steps:
C1. client by the transmission of test packet between server end and client, according to the network bandwidth between response message statistical server end and the client, and is got its mean value as final fixed bandwidth within a certain period of time;
C2. fixed bandwidth and this fixed bandwidth in the last certain hour compared, judge whether the current network bandwidth reduces, if then enter the d step, if not then enter the e step.
4. according to the method for the described adaptive bandwidth Control Network of claim 3 video quality, it is characterized in that described certain hour is 20 seconds.
5. according to the method for claim 1 or 2 described adaptive bandwidth Control Network video qualities, it is characterized in that described step e may further comprise the steps:
E1. the client supposition promotes a grade of service, searches corresponding resolution, calculates the required network bandwidth;
E2. calculate the required network bandwidth according to this, under the prerequisite of fixing message size, calculate corresponding message transmitting spped rate, and send one group of message with this speed;
E3. server end feeds back to client according to the message that receives, client is according to the packet loss of this message of detection feedback, whether the packet loss of judging this message according to the message packet loss threshold values that is provided with surpasses this threshold values, does not get back to the c step if then do not handle, if not then enter the f step.
6. according to the method for the described adaptive bandwidth Control Network of claim 5 video quality, it is characterized in that described message packet loss threshold values is 2%.
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| CN103247314A (en) * | 2012-02-02 | 2013-08-14 | 长春指南针科技有限公司 | Audio-video playing method and system |
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