CN102984230A - Device and method for transmitting data in remote assistance - Google Patents
Device and method for transmitting data in remote assistance Download PDFInfo
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- CN102984230A CN102984230A CN2012104686868A CN201210468686A CN102984230A CN 102984230 A CN102984230 A CN 102984230A CN 2012104686868 A CN2012104686868 A CN 2012104686868A CN 201210468686 A CN201210468686 A CN 201210468686A CN 102984230 A CN102984230 A CN 102984230A
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Abstract
The invention discloses a device and a method for transmitting data in remote assistance. The device comprises a recording unit, a first transmitting unit, a comparison unit and a second transmitting unit, wherein the recording unit is used for obtaining a first target image at this moment at a controlled end and generating a unique identification code for the first target image, the first transmitting unit is used for transmitting the first target image and the unique identification code corresponding to the first target image to a master control end to display the first target image at the master control end and caching the correspondence between the first target image and the unique identification code of the first target image at the master control end, the comparison unit is used for judging whether a second target image is identical to the first target image or not when the second target image at the next moment is obtained at the controlled end, and the second transmitting unit is used for transmitting the unique identification code corresponding to the first target image to the master control end if the second target image is identical to the first target image. By the aid of the device and the method, the occupation of the transmission bandwidth is greatly reduced, and the remote assistance operation can be conducted successfully and smoothly.
Description
Technical field
The present invention relates to the remote assistance technical field, be specifically related to data transmission device and method in the remote assistance.
Background technology
Along with the development of computer technology, the computer equipments such as computer have almost become indispensable instrument in people's life.But, for a lot of users, the understanding of computer is only limited to application, but be ignorant of computer is safeguarded, in case computer break down, more at a loss what to do.For this reason, some service providers provide the remote assistance service for the user, the user is as long as the remote assistance client that the build-in services merchant provides on the computer of oneself, just can link up with the technician of service provider, the technician can help the common computer user to solve software and system problem, and for example system optimization, system mend upgrading, drive installation, malicious plugins cleaning, virus/wooden horse killing, system-based setting, software are downloaded, software is installed, network failure is debugged etc.
In implementation procedure, the user can set up a session (session) by remote assistance client and technician, then by the operation of technician's adapter to user computer, at this moment, the remote assistance client of user's side can with the screen state of user computer (for example icon on the wallpaper that uses of desktop, the desktop, when front opening which window etc.) send to the technician behind the sectional drawing, so just can demonstrate at the computer of technician's side the screen state of user computer; The technician is when carrying out the remote assistance operation by mouse or keyboard etc., the remote assistance client of technician's side can generate corresponding instruction with concrete operation, and by network instruction being sent to the computer of user's side, corresponding instruction can be resolved and carry out to the computer of user's side; In the process of carrying out instruction, the screen state of user's side computer can change again (for example newly opened certain window or closed certain window or clicked start menu etc.), therefore, the remote assistance client of user's side needs constantly to send to the technician behind the screen state grabgraf with user computer, the technician carries out after the new operation, the instruction of correspondence can be sent to user's side again, move in circles with this.
As seen, prior art is in the process that realizes remote assistance, need constantly the screen state of user's side is sent to technician's side in the mode of image, this will take larger transmission bandwidth, in the limited situation of transmission bandwidth, may be so that the view data of technician's side can't in time send to technician's side, the perhaps problem such as the smooth not so that process of remote assistance seems.
Summary of the invention
In view of the above problems, the present invention has been proposed in order to provide data transmission device in a kind of remote assistance that overcomes the problems referred to above or address the above problem at least in part and the data transmission method in the corresponding remote assistance.
According to one aspect of the present invention, the data transmission device in a kind of remote assistance is provided, comprising:
Record cell, be suitable for obtaining at the remote assistance controlled terminal first object image of current time, be that described first object image generates the uniqueness identification code, and preserve corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal;
The first transmitting element, be suitable for described first object image and corresponding uniqueness identification code thereof are sent to the remote assistance main control end, in order to show described first object image in described main control end, and the corresponding relation between the described first object image of described main control end buffer memory and its uniqueness identification code;
Comparing unit is suitable for judging whether described the second target image is identical with described first object image when getting access to second target image in next moment at described controlled terminal;
The second transmitting element, if it is identical with described first object image to be suitable for described the second target image, then the uniqueness identification code that described first object image is corresponding sends to described main control end, so that described main control end finds described first object image according to described uniqueness identification code in the information of buffer memory, and described first object image is shown.
Alternatively, also comprise:
The check code generation unit is suitable for when the remote assistance controlled terminal gets access to the first object image of current time, by the mode of cyclic redundancy check (CRC) calculating, for described first object image generates the first check code;
Described record cell specifically is suitable for:
Preserve corresponding relation between described the first check code and the described uniqueness identification code at described controlled terminal;
Described comparing unit specifically is suitable for:
Mode by cyclic redundancy check (CRC) calculating, for described the second target image generates the second check code, described the second check code and described the first check code are carried out XOR, if operation result is zero, then described the second target image is identical with described first object image.
Alternatively, also comprise:
Judging unit, be suitable for by the monitoring to controlled terminal image change frequency, judge whether the target image that current time gets access to need to carry out buffer memory in main control end, if, it is described for described first object image generates the uniqueness identification code then to notify described record cell to carry out, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
Alternatively, described judging unit comprises: the first monitoring subelement, be suitable for according to default image change frequency threshold the change frequency of image in the controlled terminal being monitored, when the change frequency that has one or more images is lower than described predetermined threshold value, determine that the target image that current time gets access to need to carry out buffer memory in main control end, it is described for described first object image generates the uniqueness identification code to notify described record cell to carry out, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
Alternatively, described judging unit comprises:
The second monitoring subelement, be suitable for the Preset Time interval, when existing one or more target images not change above the described time interval, determine that the target image that current time gets access to need to carry out buffer memory in main control end, it is described for described first object image generates the uniqueness identification code to notify described record cell to carry out, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
Alternatively, also comprise:
The memory information acquiring unit is suitable for obtaining the size that main control end is used for the memory headroom of buffer memory target image;
Monitoring unit, the image size that is suitable for main control end has been added up buffer memory is monitored;
Releasing unit, be suitable for when image size that main control end has added up buffer memory reaches described memory headroom big or small, select target image to be discharged, release order to described main control end transmission, and the uniqueness identification code of target image described to be discharged sent to described main control end, so that described main control end discharges target image corresponding to this identification code.
Alternatively, described releasing unit specifically is suitable for:
The time that is buffered according to target image, and/or the number of times that is used of target image, calculate the weight of each target image that is buffered, the target image that weight is met prerequisite is defined as target image to be discharged.
Alternatively, described target image comprises following one or more combination:
Desktop background, program interface and/or iconic element.
According to a further aspect in the invention, provide the data transmission method in a kind of remote assistance, having comprised:
Obtaining the first object image of current time at the remote assistance controlled terminal, is that described first object image generates the uniqueness identification code, and preserves corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal;
Described first object image and corresponding uniqueness identification code thereof are sent to the remote assistance main control end, in order to show described first object image in described main control end, and the corresponding relation between the described first object image of described main control end buffer memory and its uniqueness identification code;
When getting access to second target image in next moment at described controlled terminal, judge whether described the second target image is identical with described first object image;
If described the second target image is identical with described first object image, then the uniqueness identification code that described first object image is corresponding sends to described main control end, so that described main control end finds described first object image according to described uniqueness identification code in the information of buffer memory, and described first object image is shown.
Alternatively, when the remote assistance controlled terminal gets access to the first object image of current time, also comprise:
By the mode of cyclic redundancy check (CRC) calculating, for described first object image generates the first check code;
The described corresponding relation of preserving between described first object image and the described uniqueness identification code at described controlled terminal comprises:
Preserve corresponding relation between described the first check code and the described uniqueness identification code at described controlled terminal;
Described described the second target image and described first object image are compared comprises:
Mode by cyclic redundancy check (CRC) calculating, for described the second target image generates the second check code, described the second check code and described the first check code are carried out XOR, if operation result is zero, then described the second target image is identical with described first object image.
Alternatively, for generating the uniqueness identification code, described first object image also comprises before:
By the monitoring to controlled terminal image change frequency, judge whether the target image that current time gets access to need to carry out buffer memory in main control end, if, then triggering execution described is that described first object image generates the uniqueness identification code, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
Alternatively, described by the monitoring to controlled terminal image change frequency, judge that whether the target image that current time gets access to need to carry out buffer memory in main control end, comprising:
According to default image change frequency threshold the change frequency of image in the controlled terminal is monitored, when the change frequency that has one or more images is lower than described predetermined threshold value, determined that the target image that current time gets access to need to carry out buffer memory in main control end.
Alternatively, described by the monitoring to controlled terminal image change frequency, judge that whether the target image that current time gets access to need to carry out buffer memory in main control end, comprising:
The Preset Time interval when existing one or more target images not change above the described time interval, determines that the target image that current time gets access to need to carry out buffer memory in main control end.
Alternatively, also comprise:
Obtain the size that main control end is used for the memory headroom of buffer memory target image;
The image size that main control end has been added up buffer memory is monitored;
When the image size that has added up buffer memory when main control end reaches described memory headroom big or small, select target image to be discharged, release order to described main control end transmission, and the uniqueness identification code of target image described to be discharged sent to described main control end, so that described main control end discharges target image corresponding to this identification code.
Alternatively, describedly select target image to be discharged to comprise:
The time that is buffered according to target image, and/or the number of times that is used of target image, calculate the weight of each target image that is buffered, the target image that weight is met prerequisite is defined as target image to be discharged.
Alternatively, described target image comprises following one or more combination:
Desktop background, program interface and/or iconic element.
According to the data transmission device in the remote assistance of the present invention and method, can carry out buffer memory to the image of controlled terminal in main control end, like this, when the image of crossing when the successive image of finding controlled terminal and buffer memory before is identical, the unique identification code of the image that just can only this buffer memory be crossed sends to main control end, and needn't send again concrete view data, and greatly reduce the taking of transmission bandwidth, be conducive to more smoothly smooth carrying out of remote assistance operation.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by the specific embodiment of the present invention.
Description of drawings
By reading hereinafter detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing only is used for the purpose of preferred implementation is shown, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts with identical reference symbol.In the accompanying drawings:
Fig. 1 shows the according to an embodiment of the invention flow chart of method;
Fig. 2 shows the desktop environment schematic diagram;
Fig. 3 shows the schematic diagram according to the device of first embodiment of the invention;
Fig. 4 shows the schematic diagram according to the device of second embodiment of the invention;
Fig. 5 shows the schematic diagram according to the device of third embodiment of the invention;
Fig. 6 shows the schematic diagram according to the device of fourth embodiment of the invention.
Embodiment
Exemplary embodiment of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown exemplary embodiment of the present disclosure in the accompanying drawing, yet should be appreciated that and to realize the disclosure and the embodiment that should do not set forth limits here with various forms.On the contrary, it is in order to understand the disclosure more thoroughly that these embodiment are provided, and can with the scope of the present disclosure complete convey to those skilled in the art.
For ease of understanding the present invention, at first need to prove, in the remote assistance process, technician's side is the equal of main control end, user's side is the equal of controlled terminal, and main control end just sends the instruction of keyboard and mouse to long-range controlled terminal computer equipment, and the screen-picture of controlled terminal computer equipment is come by the communication line passback simultaneously.That is to say, when main control end is carried out the remote assistance operation, no matter open file, still surf the web, download etc. in fact all is to carry out in long-range controlled terminal computer, the just reflection of controlled terminal computer screen that shows on the main control end computer screen.
Wherein, the main control end program is to operate in the computer terminal that help is dealt with problems, also may operate in server, work stations etc. externally provide by network on the equipment of service, and major function is the purpose that reaches the control remote computer by refreshing of the information transmission of the processing of picture, operation keyboard and the mouse of realization demonstration remote computer, event, picture etc.
Specifically can be divided into:
1) attended operation
Can realize and being connected of controlled terminal by the transfer end.For example, after controlled terminal was connected to the transfer end, main control end was connected to the transfer end; Then select the controlled terminal that to control; The input password carries out both sides' checking; Finally set up corresponding between master control and the controlled terminal.
2) picture disply
Set up local desktop window, initialization dependent picture information shows after the image information of long-range controlled terminal computer sends.
3) event handling
When the demonstration desktop window to this locality carried out various operations (such as the input of mouse action, keyboard), program realized the seizure to event message, and was combined into packets of information according to specifying information and sends to long-range controlled terminal computer.
4) frame update
When local program received message that long-range controlled terminal computer sends and is frame update, program receives needed the image information content upgraded, makes up the subregion of realizing picture according to information and local display frame and upgrades operation.
The controlled terminal program is to operate in the computer terminal that need to deal with problems, and major function is to reach by the simulation process of the transmission that realizes local image information, remote message event, the processing of picture part area update etc. to obtain main control end assistance purpose.Specifically can be divided into:
1) attended operation
When assisting, needs realize being connected to main control end.During specific implementation, still can carry out transfer by the transfer end, as, controlled terminal can at first be connected to the transfer end, waits for that main control end is connected to the transfer end; Then after main control end has been selected this controlled terminal, require main control end input validation password, finally set up corresponding between master control and the controlled terminal.
2) Message Processing
Reception is carried out the message of various operations (such as mouse action, keyboard input) from long-range main control end to showing desktop window, then carries out local simulation and triggering according to the concrete message that receives.
3) upgrade the zone
When variation that the picture of controlled terminal occurs, generate the update area domain information, be combined into data message and send to main control end and require it to carry out corresponding frame updating to show.
By the above as seen, in the process of remote assistance, in order to represent the controlled terminal screen in main control end and to follow the tracks of its variation, need to transmit a large amount of images to main control end from controlled terminal, for example, controlled terminal generally can carry out sectional drawing to screen under certain cycle, and each sectional drawing result is transferred to main control end.But, the inventor finds in realizing process of the present invention, in some cases, the image that continuous several moment gets access to may all be identical, if these images all are transferred to main control end, can cause some image is to repeat to have transmitted repeatedly in fact, if can avoid this transmission that repeats, then can greatly reduce taking transmission bandwidth.
Based on above-mentioned consideration, the embodiment of the invention at first provides the data transmission method in a kind of remote assistance, and referring to Fig. 1, the method can may further comprise the steps:
S101: obtaining the first object image of current time at the remote assistance controlled terminal, is that described first object image generates the uniqueness identification code, and preserves corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal;
In embodiments of the present invention, can be the image that grasps the controlled terminal screen according to certain cycle equally, but after grabbing piece image, be not that direct generated data message sends to main control end, but at first generate the identification code of a uniqueness (such as id etc. for this image, for ease of describing, the below all is introduced as an example of id example), be used for this image of unique identification, simultaneously, can record the information of present image and the corresponding relation between this id at controlled terminal, for follow-up processing ready.
Wherein, be to compare with the follow-up image that newly gets access in the purpose of controlled terminal recording image information, judge whether identical, therefore, during corresponding relation between recording image information and id, can be directly with the content-data of image as image information.Certainly, the space that the content-data of image takies itself can be larger, therefore, and in another kind of way of example, also can carry out cyclic redundancy check (CRC) (CyclicRedundancy Check to image, CRC) calculate, obtain a check code, then by the information of this check code as this image, corresponding relation between record check code and the id, like this, follow-up when carrying out the comparison of image, can be undertaken by the check code of comparison chart picture.
Wherein, cyclic redundancy check (CRC) is a kind of error check code the most frequently used in the data communication field, when carrying out CRC calculating, processed data (corresponding is exactly image to be recorded in embodiments of the present invention) can be regarded a binary system multinomial t (x) as, for example, 10110101 can be regarded as 2^7+2^5+2^4+2^2+2^0, and multinomial multiplication and division calculating process is identical with the polynomial multiplication and division of common algebra.Polynomial signed magnitude arithmetic(al) is take 2 as mould, and is consistent with the logic XOR.When adopting CRC check, different images adopts same generator polynomial g (x), and the first place of g (x) and last coefficient are 1.The method that generates the CRC check code can be: remove t (x) with g (x), the remainder that obtains is as the CRC check code.
When needs record corresponding relation between certain image information and the id, just can calculate by the way the CRC check code of this image, then record the corresponding relation between CRC check code and the id.It is follow-up when whether other images of needs comparisons and this image be identical, also can utilize identical generator polynomial to calculate the CRC check code of other images, then two CRC check codes are carried out XOR, whether as 0 as certificate, judge whether two images are identical take the correction result that calculates.
Need to prove, target image described in the embodiment of the invention is in order to embody the desktop environment of controlled terminal, referring to Fig. 2, suppose that 200 are the desktop of controlled terminal, then desktop environment specifically can comprise following one or more combination: desktop background 201, program interface 202 and/or iconic element 203.
S102: described first object image and corresponding uniqueness identification code thereof are sent to the remote assistance main control end, in order to show described first object image in described main control end, and the corresponding relation between the described first object image of described main control end buffer memory and its uniqueness identification code;
In the corresponding relation between controlled terminal preservation target image information and id, just content-data and the id of target image can be sent to main control end together, like this, main control end just can demonstrate this target image according to the content-data that receives, simultaneously, content-data and the corresponding id thereof of this image can also be carried out buffer memory together, for follow-up.
S103: when getting access to second target image in next moment at described controlled terminal, judge whether described the second target image is identical with described first object image;
Because controlled terminal need to periodically grasp image, therefore crawl just can be obtained the new image of a width of cloth constantly in next time, certainly, in embodiments of the present invention, the content-data that is not the image that directly will newly grab sends to main control end, but at first image that controlled terminal will newly grab with before the image that grabs compare, judge whether the image identical with this image that newly grabs.Wherein, when whether comparison two width of cloth images are identical, described in step S101, if before at record during corresponding relation, record be the content-data of image, then can directly the content-data of two images be compared, if when recording corresponding relation before, what record is the CRC check code of image, then can generate the CRC check code for new image, then judge by the mode of XOR whether two images are identical.
Need to prove, the image that will newly grab with before the image that grabs when comparing, might not be that two adjacent crawls image is constantly compared, for example, t1, t2, t3 get access to respectively image 1, image 2, image 3 constantly, and all carried out buffer memory in main control end, then when t4 gets access to image 4 constantly, can at first image 4 and image 3 be compared, if not identical, then can also compare with image 2, image 1, etc.
S104: if described the second target image is identical with described first object image, then the uniqueness identification code that described first object image is corresponding sends to described main control end, so that described main control end finds described first object image according to described uniqueness identification code in the information of buffer memory, and described first object image is shown.
If certain image that newly gets access to is identical with an image of having crossed at the main control end buffer memory before, then can only inciting somebody to action, the id of this image of buffer memory sends to main control end, and need not repeat again to send the content-data of image, main control end can according to find corresponding image for this id number in the image of buffer memory, then show.Certainly, if the image that newly gets access to is all not identical with the image that buffer memory is before crossed, then can generate id for this image that newly gets access to, and content-data and the id of this image that newly gets access to sent to main control end, when main control end shows this image that newly gets access to, also this image that newly gets access to is carried out buffer memory, by that analogy.
As seen, in embodiments of the present invention, for the view data that needs in the remote assistance process to transmit, can by carry out the mode of buffer memory in main control end, avoid the transmission that repeats of identical image, therefore, can greatly save transmission bandwidth, improve the picture fluency in the remote assistance implementation procedure.
Need to prove, in actual applications, may not be that the every width of cloth image that gets access to all need to carry out buffer memory in main control end.For example, if just at displaying video, flash etc., then the change frequency of image can be higher, can be smaller with the possibility that follow-up image repeats, so just there is no need to carry out buffer memory.Therefore, in optional embodiment of the present invention, for fear of carrying out unnecessary caching, can also carry out the judgement of buffer memory necessity.During specific implementation, can preset a change frequency threshold value, and the change frequency of monitoring controlled terminal image, surpass this threshold value (for example finding that continuous 3 two field pictures all change) if find the change frequency of one or more images, then the next frame image can carry out buffer memory in main control end, only has when the change frequency of finding one or more images is lower than this threshold value, just the next frame image is generated id, and in main control end image is carried out buffer memory, for follow-up use.For example, from the initial time that begins to carry out remote assistance, first three two field picture that controlled terminal gets access to is respectively image 1, image 2, image 3, owing to also there is not the basis for estimation of image change frequency before, therefore, can directly this three two field picture be sent to main control end, for this three two field picture, the main control end buffer memory can be required, also buffer memory can be do not required; Simultaneously, judge whether this three two field picture changes, if these continuous three two field pictures all change, the change frequency that then proves present image is higher, the probability that repetition occurs for successive image and previous image is less, therefore, and when getting access to the 4th two field picture, just can directly send it to main control end, and not require this two field picture of main control end buffer memory; Certainly, all do not change if find first three two field picture, then after getting access to the 4th two field picture, then can generate id number and the CRC identifying code for it, record corresponding relation between the two, and with the content-data of image and send to main control end for id number and carry out buffer memory, by that analogy.In a word, at controlled terminal, can be in the process of the content-data that sends image or image id, change frequency to image is added up, then determine whether the next frame image need to carry out buffer memory in main control end, can when solving the bandwidth occupancy problems of too, avoid carrying out unnecessary image buffer storage like this.
Certainly, also can judge whether in other way need to be at main control end buffer memory present image, for example, under a kind of implementation, also can preset a time interval, judge according to this time interval whether the corresponding image that constantly grabs changes, if exist one or more target images all not change above this time interval, determine that then the target image that current time gets access to need to carry out buffer memory in main control end, etc.
In main control end, because need to be to some pictures of buffer memory, therefore, the picture that buffer memory may occur is too much, cause the slack-off situation of insufficient space or processing speed, in order to tackle this situation, in embodiments of the present invention, can get access to the memory size that main control end is used for cache image at controlled terminal, then the accumulated size of the image of main control end buffer memory be added up, if will reach the free memory size, then can select the image that can discharge, then send to main control end and release order, and carry and need id number of the image that discharges, main control end discharges according to releasing order after the image of appointment, just can continue the new image of buffer memory.Wherein, during specific implementation, can be after setting up the remote assistance connection, the size that main control end is initiatively used it for the internal memory of cache image sends to controlled terminal, and controlled terminal is known the internal memory situation of main control end accordingly; Perhaps, also can be after setting up the remote assistance connection, the memory size information that controlled terminal notice main control end provides it to can be used for cache image, moreover, can also be at buffer memory after the image of some, main control end initiatively sends to controlled terminal with the situation of its free memory, and perhaps controlled terminal notice main control end reports the relevant information of free memory, etc.Main control end for can judge main control end the image of buffer memory whether will reach the free memory size, can be after getting access to main control end and can be used for the memory size of cache image, (this threshold value can be used for the memory size of cache image less than main control end to calculate a threshold value, concrete value can be come to determine according to the actual needs), require main control end buffer memory one two field picture at every turn, can calculate the image size that main control end has added up buffer memory, then compare with this threshold value, if exceed this threshold value, then can select the image request main control end to discharge.
Controlled terminal can have the multiple choices foundation when selecting to need the target image of release.For example, can select according to the sequencing that image is buffered, as, the image that is buffered the earliest is defined as the image of needs release etc.Perhaps, also can select according to " importance " of each two field picture, the judging basis of so-called importance can be the number of times that image is used.As mentioned before, after controlled terminal newly gets access to a two field picture, judging whether when the image of buffer memory is identical before, may need to compare with multiple image, therefrom selecting the image identical with it; Therefore, for a certain two field picture that is buffered, may all be identical with the follow-up multiple image that gets access to, like this, this two field picture will be used repeatedly, proves that simultaneously this two field picture is important, and the follow-up probability that is used is also larger.And the image that other were buffered may not be used to, and the number of times that perhaps uses seldom then can be confirmed as the image that can discharge.In addition, in actual applications, can also consider the time of buffer memory and the factor of this two aspect of number of times of being used, the weight of each two field picture that COMPREHENSIVE CALCULATING goes out to be buffered, and then determine can d/d image.For example, can be weight parameter of each image setting that is buffered at controlled terminal, initial condition is 0, and certain two field picture is used once will make the weight increase once, and meanwhile, weight also can pass by the time and slowly reduce.If the time of certain image buffer storage be the earliest and access times be 0, then weight will become negative, therefore, just may be selected release in the time of Insufficient memory.
Need to prove, the above all is at controlled terminal the caching situation of main control end to be monitored, and select image to be discharged at controlled terminal, in actual applications, also can monitor the cache request of self in main control end, and select image to be discharged by main control end equally, concrete method and preamble are similar, no longer describe in detail etc. here.
Corresponding with the data transmission method in the remote assistance that the embodiment of the invention provides, the embodiment of the invention also provides the data transmission device in a kind of remote assistance, and referring to Fig. 3, this device can comprise:
The first transmitting element 302, be suitable for described first object image and corresponding uniqueness identification code thereof are sent to the remote assistance main control end, in order to show described first object image in described main control end, and the corresponding relation between the described first object image of described main control end buffer memory and its uniqueness identification code;
Comparing unit 303 is suitable for judging whether described the second target image is identical with described first object image when getting access to second target image in next moment at described controlled terminal;
The second transmitting element 304, if it is identical with described first object image to be suitable for described the second target image, then the uniqueness identification code that described first object image is corresponding sends to described main control end, so that described main control end finds described first object image according to described uniqueness identification code in the information of buffer memory, and described first object image is shown.
Need to prove that in actual applications, the data transmission device in the above-mentioned remote assistance can be built in the remote assistance controlled terminal, just belongs to this situation such as Fig. 3.Perhaps, the data transmission device in the above-mentioned remote assistance also can be independent of the remote assistance controlled terminal, but can carry out with controlled terminal the application program of information interaction, as shown in Figure 4, belong to this situation.Fig. 4 compares with Fig. 3, except from controlled terminal between relation different, other are all identical, therefore no longer describe in detail, hereinafter also all the situation in Fig. 3 be introduced as example.In addition, among Fig. 3, the first transmitting element 302, the second transmitting element 304 represent to be connected by the long-range of the Internet with dotted line between the main control end, below identical among each figure.Among Fig. 4, record cell 301, comparing unit 303 and dotted line between the controlled terminal represent between the different application programs continuously.
Wherein, when controlled terminal is preserved corresponding relation between first object image information and the uniqueness identification code, can generate a check code for the first object image information, the corresponding relation of preserving between this check code and the uniqueness identification code gets final product, referring to Fig. 5, this device can also comprise:
Check code generation unit 305 is suitable for when the remote assistance controlled terminal gets access to the first object image of current time, by the mode of cyclic redundancy check (CRC) calculating, for described first object image generates the first check code;
Described record cell 301 specifically is suitable for:
Preserve corresponding relation between described the first check code and the described uniqueness identification code at described controlled terminal;
Described comparing unit 303 specifically is suitable for:
Mode by cyclic redundancy check (CRC) calculating, for described the second target image generates the second check code, described the second check code and described the first check code are carried out XOR, if operation result is zero, then described the second target image is identical with described first object image.
In the controlled terminal image change faster in the situation, the probability that present image is identical with successive image is less, such image just there is no need to carry out buffer memory in main control end, therefore, can also monitor simultaneously the change frequency of controlled terminal image, determine whether that according to change frequency needs carry out buffer memory with present image in main control end, referring to Fig. 6, this device can also comprise:
Judging unit 306, be suitable for by the monitoring to controlled terminal image change frequency, judge whether the target image that current time gets access to need to carry out buffer memory in main control end, if, it is described for described first object image generates the uniqueness identification code then to notify described record cell to carry out, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
During specific implementation, described judging unit 306 can comprise: the first monitoring subelement, be suitable for according to default image change frequency threshold the change frequency of image in the controlled terminal being monitored, when the change frequency that has one or more images is lower than described predetermined threshold value, determine that the target image that current time gets access to need to carry out buffer memory in main control end, it is described for described first object image generates the uniqueness identification code to notify described record cell to carry out, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
Perhaps, described judging unit 306 also can comprise:
The second monitoring subelement, be suitable for the Preset Time interval, when existing one or more target images not change above the described time interval, determine that the target image that current time gets access to need to carry out buffer memory in main control end, it is described for described first object image generates the uniqueness identification code to notify described record cell to carry out, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
When specific implementation, this device can also comprise:
The memory information acquiring unit is suitable for obtaining the size that main control end is used for the memory headroom of buffer memory target image;
Monitoring unit, the image size that is suitable for main control end has been added up buffer memory is monitored;
Releasing unit, be suitable for when image size that main control end has added up buffer memory reaches described memory headroom big or small, select target image to be discharged, release order to described main control end transmission, and the uniqueness identification code of target image described to be discharged sent to described main control end, so that described main control end discharges target image corresponding to this identification code.
Wherein, described releasing unit specifically is suitable for:
The time that is buffered according to target image, and/or the number of times that is used of target image, calculate the weight of each target image that is buffered, the target image that weight is met prerequisite is defined as target image to be discharged.
Described target image comprises following one or more combination:
Desktop background, program interface and/or iconic element.
Intrinsic not relevant with any certain computer, virtual system or miscellaneous equipment with demonstration at this algorithm that provides.Various general-purpose systems also can be with using based on the teaching at this.According to top description, it is apparent constructing the desired structure of this type systematic.In addition, the present invention is not also for any certain programmed language.Should be understood that and to utilize various programming languages to realize content of the present invention described here, and the top description that language-specific is done is in order to disclose preferred forms of the present invention.
In the specification that provides herein, a large amount of details have been described.Yet, can understand, embodiments of the invention can be put into practice in the situation of these details not having.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, in order to simplify the disclosure and to help to understand one or more in each inventive aspect, in the description to exemplary embodiment of the present invention, each feature of the present invention is grouped together in single embodiment, figure or the description to it sometimes in the above.Yet the method for the disclosure should be construed to the following intention of reflection: namely the present invention for required protection requires the more feature of feature clearly put down in writing than institute in each claim.Or rather, as following claims reflected, inventive aspect was to be less than all features of the disclosed single embodiment in front.Therefore, follow claims of embodiment and incorporate clearly thus this embodiment into, wherein each claim itself is as independent embodiment of the present invention.
Those skilled in the art are appreciated that and can adaptively change and they are arranged in one or more equipment different from this embodiment the module in the equipment among the embodiment.Can be combined into a module or unit or assembly to the module among the embodiment or unit or assembly, and can be divided into a plurality of submodules or subelement or sub-component to them in addition.In such feature and/or process or unit at least some are mutually repelling, and can adopt any combination to disclosed all features in this specification (comprising claim, summary and the accompanying drawing followed) and so all processes or the unit of disclosed any method or equipment make up.Unless in addition clearly statement, disclosed each feature can be by providing identical, being equal to or the alternative features of similar purpose replaces in this specification (comprising claim, summary and the accompanying drawing followed).
In addition, those skilled in the art can understand, although embodiment more described herein comprise some feature rather than further feature included among other embodiment, the combination of the feature of different embodiment means and is within the scope of the present invention and forms different embodiment.For example, in the following claims, the one of any of embodiment required for protection can be used with compound mode arbitrarily.
All parts embodiment of the present invention can realize with hardware, perhaps realizes with the software module of moving at one or more processor, and perhaps the combination with them realizes.It will be understood by those of skill in the art that and to use in practice microprocessor or digital signal processor (DSP) to realize according to some or all some or repertoire of parts in the data transmission set in the remote assistance of the embodiment of the invention.The present invention can also be embodied as be used to part or all equipment or the device program (for example, computer program and computer program) of carrying out method as described herein.Such realization program of the present invention can be stored on the computer-readable medium, perhaps can have the form of one or more signal.Such signal can be downloaded from internet website and obtain, and perhaps provides at carrier signal, perhaps provides with any other form.
It should be noted above-described embodiment the present invention will be described rather than limit the invention, and those skilled in the art can design alternative embodiment in the situation of the scope that does not break away from claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed in element or step in the claim.Being positioned at word " " before the element or " one " does not get rid of and has a plurality of such elements.The present invention can realize by means of the hardware that includes some different elements and by means of the computer of suitably programming.In having enumerated the unit claim of some devices, several in these devices can be to come imbody by same hardware branch.The use of word first, second and C grade does not represent any order.Can be title with these word explanations.
The application can be applied to computer system/server, and it can be with numerous other universal or special computingasystem environment or configuration operation.The example that is suitable for well-known computing system, environment and/or the configuration used with computer system/server includes but not limited to: personal computer system, server computer system, thin client, thick client computer, hand-held or laptop devices, system, set-top box, programmable consumer electronics, NetPC Network PC, minicomputer system, large computer system based on microprocessor and comprise the distributed cloud computing technology environment of above-mentioned any system, etc.Computer system/server can be described under the general linguistic context of the computer system executable instruction (such as program module) of being carried out by computer system.Usually, program module can comprise routine, program, target program, assembly, logic, data structure etc., and they are carried out specific task or realize specific abstract data type.Computer system/server can be implemented in distributed cloud computing environment, and in the distributed cloud computing environment, task is by carrying out by the teleprocessing equipment of communication network link.In distributed cloud computing environment, program module can be positioned on the Local or Remote computing system storage medium that comprises memory device.
Claims (16)
1. the data transmission device in the remote assistance comprises:
Record cell, be suitable for obtaining at the remote assistance controlled terminal first object image of current time, be that described first object image generates the uniqueness identification code, and preserve corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal;
The first transmitting element, be suitable for described first object image and corresponding uniqueness identification code thereof are sent to the remote assistance main control end, in order to show described first object image in described main control end, and the corresponding relation between the described first object image of described main control end buffer memory and its uniqueness identification code;
Comparing unit is suitable for judging whether described the second target image is identical with described first object image when getting access to second target image in next moment at described controlled terminal;
The second transmitting element, if it is identical with described first object image to be suitable for described the second target image, then the uniqueness identification code that described first object image is corresponding sends to described main control end, so that described main control end finds described first object image according to described uniqueness identification code in the information of buffer memory, and described first object image is shown.
2. device as claimed in claim 1 also comprises:
The check code generation unit is suitable for when the remote assistance controlled terminal gets access to the first object image of current time, by the mode of cyclic redundancy check (CRC) calculating, for described first object image generates the first check code;
Described record cell specifically is suitable for:
Preserve corresponding relation between described the first check code and the described uniqueness identification code at described controlled terminal;
Described comparing unit specifically is suitable for:
Mode by cyclic redundancy check (CRC) calculating, for described the second target image generates the second check code, described the second check code and described the first check code are carried out XOR, if operation result is zero, then described the second target image is identical with described first object image.
3. device as claimed in claim 1 also comprises:
Judging unit, be suitable for by the monitoring to controlled terminal image change frequency, judge whether the target image that current time gets access to need to carry out buffer memory in main control end, if, it is described for described first object image generates the uniqueness identification code then to notify described record cell to carry out, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
4. device as claimed in claim 3, described judging unit comprises: the first monitoring subelement, be suitable for according to default image change frequency threshold the change frequency of image in the controlled terminal being monitored, when the change frequency that has one or more images is lower than described predetermined threshold value, determine that the target image that current time gets access to need to carry out buffer memory in main control end, it is described for described first object image generates the uniqueness identification code to notify described record cell to carry out, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
5. device as claimed in claim 3, described judging unit comprises:
The second monitoring subelement, be suitable for the Preset Time interval, when existing one or more target images not change above the described time interval, determine that the target image that current time gets access to need to carry out buffer memory in main control end, it is described for described first object image generates the uniqueness identification code to notify described record cell to carry out, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
6. device as claimed in claim 1 also comprises:
The memory information acquiring unit is suitable for obtaining the size that main control end is used for the memory headroom of buffer memory target image;
Monitoring unit, the image size that is suitable for main control end has been added up buffer memory is monitored;
Releasing unit, be suitable for when image size that main control end has added up buffer memory reaches described memory headroom big or small, select target image to be discharged, release order to described main control end transmission, and the uniqueness identification code of target image described to be discharged sent to described main control end, so that described main control end discharges target image corresponding to this identification code.
7. device as claimed in claim 6, described releasing unit specifically is suitable for:
The time that is buffered according to target image, and/or the number of times that is used of target image, calculate the weight of each target image that is buffered, the target image that weight is met prerequisite is defined as target image to be discharged.
8. such as each described device of claim 1 to 7, described target image comprises following one or more combination:
Desktop background, program interface and/or iconic element.
9. the data transmission method in the remote assistance comprises:
Obtaining the first object image of current time at the remote assistance controlled terminal, is that described first object image generates the uniqueness identification code, and preserves corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal;
Described first object image and corresponding uniqueness identification code thereof are sent to the remote assistance main control end, in order to show described first object image in described main control end, and the corresponding relation between the described first object image of described main control end buffer memory and its uniqueness identification code;
When getting access to second target image in next moment at described controlled terminal, judge whether described the second target image is identical with described first object image;
If described the second target image is identical with described first object image, then the uniqueness identification code that described first object image is corresponding sends to described main control end, so that described main control end finds described first object image according to described uniqueness identification code in the information of buffer memory, and described first object image is shown.
10. method as claimed in claim 9 when the remote assistance controlled terminal gets access to the first object image of current time, also comprises:
By the mode of cyclic redundancy check (CRC) calculating, for described first object image generates the first check code;
The described corresponding relation of preserving between described first object image and the described uniqueness identification code at described controlled terminal comprises:
Preserve corresponding relation between described the first check code and the described uniqueness identification code at described controlled terminal;
Described described the second target image and described first object image are compared comprises:
Mode by cyclic redundancy check (CRC) calculating, for described the second target image generates the second check code, described the second check code and described the first check code are carried out XOR, if operation result is zero, then described the second target image is identical with described first object image.
11. method as claimed in claim 9 also comprises for described first object image generates the uniqueness identification code before:
By the monitoring to controlled terminal image change frequency, judge whether the target image that current time gets access to need to carry out buffer memory in main control end, if, then triggering execution described is that described first object image generates the uniqueness identification code, and the operation of preserving the corresponding relation between described first object image information and the described uniqueness identification code at described controlled terminal.
12. method as claimed in claim 11, described by the monitoring to controlled terminal image change frequency, judge whether the target image that current time gets access to need to carry out buffer memory in main control end, comprise: according to default image change frequency threshold the change frequency of image in the controlled terminal is monitored, when the change frequency that has one or more images is lower than described predetermined threshold value, determine that the target image that current time gets access to need to carry out buffer memory in main control end.
13. method as claimed in claim 11 is described by the monitoring to controlled terminal image change frequency, judges that whether the target image that current time gets access to need to carry out buffer memory in main control end, comprising:
The Preset Time interval when existing one or more target images not change above the described time interval, determines that the target image that current time gets access to need to carry out buffer memory in main control end.
14. method as claimed in claim 9 also comprises:
Obtain the size that main control end is used for the memory headroom of buffer memory target image;
The image size that main control end has been added up buffer memory is monitored;
When the image size that has added up buffer memory when main control end reaches described memory headroom big or small, select target image to be discharged, release order to described main control end transmission, and the uniqueness identification code of target image described to be discharged sent to described main control end, so that described main control end discharges target image corresponding to this identification code.
15. method as claimed in claim 14 describedly selects target image to be discharged to comprise:
The time that is buffered according to target image, and/or the number of times that is used of target image, calculate the weight of each target image that is buffered, the target image that weight is met prerequisite is defined as target image to be discharged.
16. such as each described method of claim 9 to 15, described target image comprises following one or more combination:
Desktop background, program interface and/or iconic element.
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