CN103607596A - Clock calibration processing method and device - Google Patents
Clock calibration processing method and device Download PDFInfo
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- CN103607596A CN103607596A CN201310597172.7A CN201310597172A CN103607596A CN 103607596 A CN103607596 A CN 103607596A CN 201310597172 A CN201310597172 A CN 201310597172A CN 103607596 A CN103607596 A CN 103607596A
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Abstract
The invention provides a clock calibration processing method and device. The method includes the first step of determining the delay time when a client-side receives video frames from a server according to the transmission time of the video frames and the compression time of the video frames, and the second step of carrying out clock calibration processing on the client-side according to the delay time. According to the technical scheme, seamless handover from refreshing of common pictures to playing of video streams can be achieved, and the phenomenon of freeze or frame loss of a video or not playing of a video is avoided.
Description
Technical field
The present invention relates to computer technology, clock alignment processing method and device while relating in particular to a kind of remote dummy desktop video broadcasting.
Background technology
Independent computation environment simple protocol (Simple Protocol for Independent Computing Environment is called for short SPICE) is a kind of desktop virtual host-host protocol.When using virtual desktop, user is connected on server by network at thin-client, Fig. 1 is the virtual desktop framework schematic diagram based on SPICE agreement, as shown in Figure 1, the desktop operating system of using server to fictionalize in client, as the client operating system in Fig. 1 (Guest Operation System is called for short Guest OS) completes various tasks, in fact desktop operating system is not at local runtime, and desktop operating system operates in server end in fact.Utilize virtual desktop, user can use thin-client to use powerful resource on server.SPICE protocol definition a server program (SPICE Server) and client-side program (SPICE Client), SPICE Server operates on the OS of server, SPICE Client operates on the OS of client.SPICE Server is responsible for processing image, the audio frequency output of Guest OS, by channel transfer, to SPICE Client, by SPICE Client, exports to user on thin-client.SPICE Client is responsible for input operations such as keyboard and mouses, by channel transfer to SPICE Server, by SPICE Server, input is submitted to Guest OS, in order to allow user use the sensation of desktop just as local runtime in client, so just need server ceaselessly the screen display picture of Guest OS to be transferred to client, client constantly refreshes picture and upgrades local demonstration.
Prior art is when the virtual desktop using based on SPICE agreement, when displaying video in LAN environment, the clock alignment mode adopting is: server is when initialization, tranmitting data register message arranges the clock of client, the value of server after server time deducts 400ms is as client time and be synchronized to client, finally, the clock of client is than the Zao 400ms of the clock of service end.
Yet, if adopt the clock correcting method of prior art during displaying video in LAN environment, when there will be video to start the time about 1 second, there is obvious Caton phenomenon, after suspending displaying video, while again continuing to play again, there is same Caton phenomenon, moreover, if play some HD videos in the situation that of low bandwidth, there will be a large amount of frame losing phenomenons, and it is higher to work as server load, for example many client connection server use simultaneously virtual desktops service, or when server performance is poor, also the phenomenon that there will be video to play.
Summary of the invention
The embodiment of the present invention provides a kind of clock alignment processing method and device, in order to realize, seamlessly from common picture, refreshes and is switched to video render, the phenomenon that avoided the card of video playback to pause, frame losing maybe cannot be play when the displaying video.
First aspect of the present invention is to provide a kind of clock alignment processing method, comprising:
According to the compression time of the transmission time of frame of video and described frame of video, determine that client receives the delay time of described frame of video from server;
According to described delay time, described client is carried out to clock alignment processing.
Second aspect of the present invention is to provide a kind of clock alignment processing unit, comprising:
Time delay determination module, for determining that according to the compression time of the transmission time of frame of video and described frame of video client receives the delay time of described frame of video from server;
Clock alignment module, for carrying out clock alignment processing according to described delay time to described client.
Clock alignment processing method provided by the invention and device, by first determining the delay time between server and client side according to the compression time of the transmission time of frame of video and frame of video, according to delay time, client is carried out to clock alignment processing again, can realize seamlessly and refresh and be switched to video render from common picture, the phenomenon that avoided the card of video playback to pause, frame losing maybe cannot be play.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the virtual desktop framework schematic diagram based on SPICE agreement;
Fig. 2 is the flow chart of clock alignment processing method embodiment mono-provided by the invention;
Fig. 3 is the deployment schematic diagram of virtual desktop;
Fig. 4 is the flow chart of clock alignment processing method embodiment bis-provided by the invention;
Fig. 5 is the flow chart of clock alignment processing method embodiment bis-provided by the invention;
Fig. 6 is the structural representation of clock alignment processing unit embodiment mono-provided by the invention;
Fig. 7 is the structural representation of clock alignment processing unit embodiment bis-provided by the invention;
Fig. 8 is the structural representation of clock alignment processing unit embodiment tri-provided by the invention;
Fig. 9 is the structural representation of clock alignment processing unit embodiment tetra-provided by the invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 2 is the flow chart of clock alignment processing method embodiment mono-provided by the invention, and as shown in Figure 2, the clock alignment processing method of the present embodiment comprises:
S101, according to the compression time of the transmission time of frame of video and frame of video, determine that client is from the delay time of server receiver, video frame.
Application scenarios of the present invention can be the video playback in virtual desktop, and this virtual desktop can be the virtual desktop based on SPICE agreement.
Fig. 3 is the deployment schematic diagram of virtual desktop, and as shown in Figure 3, server and client side connects by network, is understandable that, the client of using in virtual desktop is generally thin-client.
The executive agent of the present embodiment can be clock alignment processing unit, and this clock alignment processing unit can be the part in server or server.
Adopt clock alignment scheme of the prior art, in the time of can causing video playback card pause, frame losing maybe cannot play, for example, the in the situation that of high bandwidth during displaying video, front 1 second of playing, SPICE Client is always at the common picture of normal refresh, at SPICE Server, detect after video, send video pictures, possible video pictures transmission and the time delay of processing do not reach 400ms, suppose that time delay only has 50ms, SPICE Client receives after first frame of video so, will postpone to play after 350ms.Switch to so SPICE Client in the time of 350ms after video pictures and do not refresh any picture, picture pauses always, just starts to refresh after 350ms, so user just feels to have occurred card, pauses; For another example, if play HD video in the situation that of low bandwidth, frame of video time delay may surpass 400ms, will there will be a large amount of frame losings so.In addition,, when having more client connection server or server performance poor, the time delay of video also may surpass 400ms, also there will be frame losing.
Because server and client side's time delay is in fact unfixed, network bandwidth during displaying video, the size of frame of video and server compresses processing speed all can affect time delay, the present embodiment passes through in real time according to the delay time between the compression time calculation server of the transmission time of frame of video and frame of video and client, and the time of using the delay time calibration client calculating, but not adopt the constant time lag time of the prior art, can realize seamlessly and refresh and be switched to video render from common picture, avoided card, the phenomenon that frame losing maybe cannot be play.
S102, according to delay time, client is carried out to clock alignment processing.
Further, S102 can comprise:
The time of server is deducted to the time that delay time is determined client;
To client tranmitting data register message, clock message comprises the time of client.
The clock alignment processing method that the present embodiment provides, by first determining that according to the compression time of the transmission time of frame of video and frame of video client is from the delay time of server receiver, video frame, according to delay time, client is carried out to clock alignment processing again, can realize seamlessly and refresh and be switched to video render from common picture, the phenomenon that avoided the card of video playback to pause, frame losing maybe cannot be play.
Fig. 4 is the flow chart of clock alignment processing method embodiment bis-provided by the invention, as shown in Figure 4, the clock alignment processing method of the present embodiment, on basis embodiment illustrated in fig. 2, to determining that the detailed process of transmission time and compression time describes, and comprising:
The network bandwidth between server and client side is determined in S201, detection.
For instance, the clock alignment processing method of the present embodiment can Timing measurement server and client between the network bandwidth, this timing can be 15 seconds.
Be understandable that, the clock alignment processing method of embodiment can just start the network bandwidth between Timing measurement server and client after client connection server, also can be when client starts picture that reception server sends the network bandwidth between Timing measurement server and client.
S202, according to the size of data of the network bandwidth and frame of video, determine the transmission time.
Further, S202 can comprise: use the size of data of frame of video to determine the transmission time divided by the network bandwidth.
S203, determine compression time according to the time of the timestamp of frame of video and current server.
Further, S203 can comprise: the time of use current server deducts the timestamp of frame of video and determines compression time.
Specifically, the time of the timestamp of frame of video for adding before this frame of video of compression, the time of current server completes the time afterwards for this video frame compression, so can deduct with the time of current server the timestamp of frame of video, determines compression time.
It should be noted that, the present embodiment does not limit the sequencing of S203 and S204.
S204, the summation of transmission time and compression time is determined to delay time.
S205, according to delay time, client is carried out to clock alignment processing.
The clock alignment processing method that the present embodiment provides, first detect the network bandwidth of determining between server and client side, according to the size of data of the network bandwidth and frame of video, determine the transmission time, determine compression time according to the time of the timestamp of frame of video and current server, transmission time and compression time summation are determined to delay time, according to delay time, client is carried out to clock alignment processing, can realize seamlessly and refresh and be switched to video render from common picture, the phenomenon that avoided the card of video playback to pause, frame losing maybe cannot be play.
Fig. 5 is the flow chart of clock alignment processing method embodiment tri-provided by the invention, and as shown in Figure 5, the first frame that the clock alignment processing method of the present embodiment is treated displaying video carries out clock alignment processing, can comprise:
S301, obtain next picture.
Whether the picture that S302, judgement get is frame of video, if so, carries out S303; Otherwise carry out S309.
S303, be that frame of video adds timestamp.
S304, compressed video frame.
S305, judge whether frame of video to be sent is the first frame of video to be played, if so, carries out S306, otherwise carry out S310.
S306, according to the compression time of the transmission time of the first frame of video to be played and the first frame, determine that client receives the delay time of the first frame from server.
Specifically, S306 can comprise:
According to the size of data of the network bandwidth and frame of video, determine the transmission time.
Determine compression time according to the time of the timestamp of frame of video and current server.
It should be noted that, in the present embodiment, in calculative determination delay time process, calculate compression time and be the compression time that uses time of current server to deduct frame of video, so the time of calculative determination delay time is included, and because the time that the operation of the present embodiment calculative determination delay time is spent is very short, so can not affect the time of server process frame of video.
S307, the time of server is deducted to the time that delay time is determined client.
S308, to client tranmitting data register message, clock message comprises the time of client.
Specifically, server, when tranmitting data register message, because the data volume of clock message is very little, can be regarded as that moment completes, so also can not impact the time of delay time and server processing video frames.
S309, using the picture getting as common picture processing.
S310, send frame of video to be sent.
The clock alignment processing method that the present embodiment provides, by first determining that according to the compression time of the transmission time of the first frame of video to be played and the first frame client receives the delay time of the first frame from server, the time of server is deducted to the time that delay time is determined client, again to client tranmitting data register message, clock message comprises the time of client, can realize seamlessly and refresh and be switched to video render from common picture, the phenomenon that avoided the card of video playback to pause, frame losing maybe cannot be play.
Be understandable that, technical scheme of the present invention can also be applied in the agreement of other virtual desktops based on video detection, and this quasi-protocol all can exist common picture to refresh the problem of switching with video playback after video being detected.
Fig. 6 is the structural representation of clock alignment processing unit embodiment mono-provided by the invention, as shown in Figure 6, the clock alignment processing unit of the present embodiment, comprise: time delay determination module 61 and clock alignment module 62, wherein, time delay determination module 61 is for determining that according to the compression time of the transmission time of frame of video and frame of video client is from the delay time of server receiver, video frame; Clock alignment module 62 is for carrying out clock alignment processing according to delay time to client.
Further, clock alignment module 62 is specifically for deducting by the time of server the time that delay time is determined client, and to client tranmitting data register message, clock message comprises the time of client.
The device of the present embodiment, can be for the technical scheme of embodiment of the method shown in execution graph 2, and it realizes principle and technique effect is similar, repeats no more herein.
Fig. 7 is the structural representation of clock alignment processing unit embodiment bis-provided by the invention, and as shown in Figure 7, the clock alignment processing unit of the present embodiment, on basis embodiment illustrated in fig. 6, also comprises:
Further, time delay determination module 61 is specifically for determining the transmission time according to the size of data of the network bandwidth and frame of video, determine compression time according to the time of the timestamp of frame of video and current server, transmission time and compression time summation are determined to delay time.
Further, time delay determination module 61 is also for being used the size of data of frame of video to determine the transmission time divided by the network bandwidth;
Alternatively, time delay determination module 61 is also for being used the timestamp that the time of current server deducts frame of video to determine compression time.
The device of the present embodiment, can be for the technical scheme of embodiment of the method shown in execution graph 4, and it realizes principle and technique effect is similar, repeats no more herein.
Fig. 8 is the structural representation of clock alignment processing unit embodiment tri-provided by the invention, and as shown in Figure 8, the clock alignment processing unit of the present embodiment, on basis embodiment illustrated in fig. 7, also comprises: judge module 64 and sending module 65; Time delay determination module 61 also for: according to the compression time of the transmission time of the first frame of video to be played and the first frame, determine that client receives the delay time of the first frame from server;
The device of the present embodiment, can be for the technical scheme of embodiment of the method shown in execution graph 5, and it realizes principle and technique effect is similar, repeats no more herein.
Fig. 9 is the structural representation of clock alignment processing unit embodiment tetra-provided by the invention, as shown in Figure 9, the clock alignment processing unit of the present embodiment can be server 900, the server of the present embodiment can comprise virtual engine 910 and server program 920, in server program 920, can comprise: bandwidth detection 921, time delay determination module 922 and clock alignment module 923, time delay determination module 922 is after the first frame compression of video to be played, called before being sent out, obtain the size of data of the first frame and the timestamp of the first frame, and obtain the network bandwidth between server 900 and client by the query interface of bandwidth detection 921, according to the network bandwidth, delay time between the timestamp of the size of data of the first frame and the first frame and server time calculation server 900 and client, and by interface, delay time is informed to clock alignment module 923, so that clock alignment module 923 deducts by the time of server the time that delay time is determined client, and to client tranmitting data register message, clock message comprises the time of client.
The device of the present embodiment, can be for the technical scheme of embodiment of the method shown in execution graph 2 or Fig. 4, and it realizes principle and technique effect is similar, repeats no more herein.
It should be noted that, structural representation corresponding to the various embodiments described above is only a kind of signal, and the annexation of each several part or module is not limited to the form shown in figure, can be as the criterion with the situation in practical application.
In several embodiment provided by the present invention, should be understood that disclosed apparatus and method can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual realization, can have other dividing mode, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in a plurality of network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that also can adopt hardware to add SFU software functional unit realizes.
The integrated unit that the above-mentioned form with SFU software functional unit realizes, can be stored in a computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) or processor (processor) carry out the part steps of method described in each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CDs.
Those skilled in the art can be well understood to, for convenience and simplicity of description, only the division with above-mentioned each functional module is illustrated, in practical application, can above-mentioned functions be distributed and by different functional modules, completed as required, the internal structure that is about to device is divided into different functional modules, to complete all or part of function described above.The specific works process of the device of foregoing description, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a clock alignment processing method, is characterized in that, comprising:
According to the compression time of the transmission time of frame of video and described frame of video, determine that client receives the delay time of described frame of video from server;
According to described delay time, described client is carried out to clock alignment processing.
2. method according to claim 1, is characterized in that, the described compression time according to the transmission time of frame of video and described frame of video determines that client receives the delay time of described frame of video from server, comprising:
According to the size of data of the network bandwidth and described frame of video, determine the described transmission time;
Determine described compression time according to the time of the timestamp of described frame of video and current described server;
Described transmission time and the summation of described compression time are determined to described delay time.
3. method according to claim 2, is characterized in that, the described size of data according to the network bandwidth and described frame of video also comprises before determining the described transmission time:
Detect the network bandwidth of determining between described server and described client.
4. method according to claim 1, is characterized in that,
The described compression time according to the transmission time of frame of video and described frame of video determines that client receives the delay time of described frame of video from server, comprising:
According to the compression time of the transmission time of the first frame of video to be played and described the first frame, determine that described client receives the delay time of described the first frame from described server;
The described compression time according to the transmission time of the first frame of video to be played and described the first frame also comprises before determining that described client receives the delay time of described the first frame from described server:
Judge whether frame of video to be sent is the first frame of described video to be played;
If so, carry out the described compression time according to the transmission time of the first frame of video to be played and described the first frame and determine that described client receives the delay time of described the first frame from described server;
If not, send described frame of video to be sent.
5. according to the method described in any one in claim 1-4, it is characterized in that, describedly according to described delay time, described client carried out to clock alignment processing, comprising:
The time of described server is deducted to the time that described delay time is determined described client;
To described client tranmitting data register message, described clock message comprises the time of described client.
6. a clock alignment processing unit, is characterized in that, comprising:
Time delay determination module, for determining that according to the compression time of the transmission time of frame of video and described frame of video client receives the delay time of described frame of video from server;
Clock alignment module, for carrying out clock alignment processing according to described delay time to described client.
7. device according to claim 6, it is characterized in that, described time delay determination module is specifically for determining the described transmission time according to the size of data of the network bandwidth and described frame of video, determine described compression time according to the time of the timestamp of described frame of video and current described server, described transmission time and the summation of described compression time are determined to described delay time.
8. device according to claim 7, is characterized in that, also comprises:
Bandwidth detection, before determining the described transmission time in the described size of data according to the network bandwidth and described frame of video, detects the network bandwidth between described server and described client.
9. device according to claim 6, is characterized in that,
Described time delay determination module is also for determining that according to the compression time of the transmission time of the first frame of video to be played and described the first frame described client receives the delay time of described the first frame from described server;
Described device also comprises: judge module and sending module;
Described judge module, for before the described compression time according to the transmission time of the first frame of video to be played and described the first frame determines that described client receives the delay time of described the first frame from described server, judges whether frame of video to be sent is the first frame of described video to be played; If so, described time delay determination module determines that according to the compression time of the transmission time of the first frame of video to be played and described the first frame described client receives the delay time of described the first frame from described server; If not, described sending module sends described frame of video to be sent.
10. according to the device described in any one in claim 6-9, it is characterized in that, described clock alignment module is specifically for deducting by the time of described server the time that described delay time is determined described client, to described client tranmitting data register message, described clock message comprises the time of described client.
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| CN107132999A (en) * | 2016-02-29 | 2017-09-05 | 佳能株式会社 | Management system, replacement management equipment, management method and storage medium |
| CN108874826A (en) * | 2017-05-12 | 2018-11-23 | 杭州海康威视数字技术股份有限公司 | Video-frequency band sort method and cloud storage system |
| CN115347964A (en) * | 2022-05-23 | 2022-11-15 | 苏州市福川科技有限公司 | Broadcasting station clock management system and method |
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