CN102547452A - Method and device for downloading image files and set top box - Google Patents
Method and device for downloading image files and set top box Download PDFInfo
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- CN102547452A CN102547452A CN2011104440346A CN201110444034A CN102547452A CN 102547452 A CN102547452 A CN 102547452A CN 2011104440346 A CN2011104440346 A CN 2011104440346A CN 201110444034 A CN201110444034 A CN 201110444034A CN 102547452 A CN102547452 A CN 102547452A
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Abstract
The invention discloses a method and a device for downloading image files and a set top box. The downloading method includes: step S102, the set top box requests a server to download data of an image file corresponding to an appointed network bandwidth in length by means of the appointed network bandwidth, wherein the image file is a binary application program; step S104, the set top box obtains the current network bandwidth according to the length of the data of the image file returned by the server and determines the network bandwidth used for next requesting of downloading of the image files according to the current network bandwidth, wherein the network bandwidth used for next requesting of downloading of the image files is smaller than or equal to the current network bandwidth; and the set top box uses the network bandwidth used for next requesting of downloading of the image files as the appointed network bandwidth to repeat the step S102 and the step S104 until the whole image file is downloaded. By means of the method and the device for downloading image files and the set top box, rapid upgrading can be guaranteed, and smoothness of the network is improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method for down loading of image file and device, STB.
Background technology
Along with IPTV (Internet Protocol television; Abbreviate IPTV as) expansion in STB market, the competition of IPTV STB is more and more fierce, and the business of various new releases emerges in an endless stream; STB often needs the active request data download, handles to show the user.Under the overall situation of IP network, various IP network equipment are occupied bandwidth all, if do not consider the network bandwidth present situation during IP STB data download, certainly will influence the miscellaneous equipment in the IP network.
At present, do not consider that an exemplary of bandwidth present situation is exactly when the IP STB is downloaded, do not consider the bandwidth present situation during IPTV set top box upgrading, influenced the miscellaneous equipment in the IP network.Therefore, prior art is still waiting to improve and development.
Summary of the invention
To the problem that other equipment in the IP network is impacted during STB download and upgrade image file in the correlation technique, the invention provides a kind of download scenarios of image file, to address the above problem at least.
To achieve these goals, according to an aspect of the present invention, a kind of method for down loading of image file is provided.
Method for down loading according to image file of the present invention comprises: step S102, STB use the specified network bandwidth to the data of server requests download with the image file of the corresponding length of specified network bandwidth, and wherein, image file is binary application program; Step S104; The length of the data of the image file that STB returns according to server obtains the current network bandwidth; And according to the employed network bandwidth of current network bandwidth definite request next time download image file; Wherein, the employed network bandwidth of request download image file is less than or equal to the current network bandwidth next time; STB will ask to download the employed network bandwidth of image file as the specified network bandwidth next time, and repeated execution of steps S102 and step S104 download completion until whole image file.
Preferably; STB uses the specified network bandwidth to comprise to the data of server requests download with the image file of the corresponding length of specified network bandwidth: STB obtains the length of the per second transmission binary system byte corresponding with this speed according to specified network bandwidth calculation and specified network bandwidth rate corresponding; STB is to the data of the image file of the length of this binary system byte of server requests download.
Preferably, the employed network bandwidth of request download image file is 80% of a current network bandwidth next time.
Preferably; In step S104; If the length of the data of the image file that the length of the data of the image file that server returns is downloaded less than the STB request, the corresponding network bandwidth of the length of the data of the image file that then will return with server is as the current network bandwidth; If the length of the data of the image file that server returns equals the length of the data of the image file that the STB request downloads; Then calculate the needed time of length of the data of the image file of downloading STB request download, and according to this time adjustment current network bandwidth.
Preferably; Calculate the needed time of length of the data of the image file of downloading STB request download; And comprise according to this adjustment current network bandwidth time: if should the time less than predetermined threshold; The length of the data of the image file of then the STB request being downloaded increases by first predetermined value, and the network bandwidth that will be corresponding with increasing by first predetermined value is as the current network bandwidth; If should the time more than or equal to predetermined threshold, the length of the data of the image file of then the STB request being downloaded reduces by second predetermined value, and the network bandwidth that will be corresponding with reducing by second predetermined value is as the current network bandwidth.
Preferably, after whole image file was downloaded completion, also comprise: the whole image file that will be loaded in down in the STB internal memory was saved among the FLASH, restarts STB.
Preferably, STB and server adopt http protocol to carry out method for down loading.
To achieve these goals, according to a further aspect in the invention, a kind of download apparatus of image file is provided.
Download apparatus according to image file of the present invention comprises: request module, and be used to use the specified network bandwidth to the data of server requests download with the image file of the corresponding length of specified network bandwidth, wherein, image file is binary application program; Determination module; The length of the data of the image file that is used for returning according to server obtains the current network bandwidth; And according to the employed network bandwidth of current network bandwidth definite request next time download image file; Wherein, the employed network bandwidth of request download image file is less than or equal to the current network bandwidth next time; Download module is used for request is next time downloaded the employed network bandwidth of image file as the specified network bandwidth, and indication request module and determination module repeat, and download until whole image file and accomplish.
Preferably; Determination module also comprises: adjustment unit; Be used under the situation of the length of the data of the image file that the length of the data of the image file that server returns is downloaded less than the STB request, the corresponding network bandwidth of the length of the data of the image file that will return with server is as the current network bandwidth; And equal in the length of the data of the image file that server returns under the situation of length of data of the image file that the STB request downloads; Calculate the needed time of length of the data of the image file of downloading STB request download, and according to this time adjustment current network bandwidth.
To achieve these goals, in accordance with a further aspect of the present invention, a kind of STB is provided.
According to STB of the present invention, comprise the download apparatus of above-mentioned image file.
Through the present invention; Adopt the gradation request to download designated length image file data; Adjust the mode of download network speed in real time; The problem that when having solved STB download and upgrade image file in the correlation technique other equipment in the IP network has been impacted has been guaranteed the quick completion of upgrading, has improved the fluency of network.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the method for down loading of the image file of the embodiment of the invention;
Fig. 2 is the structured flowchart according to the download apparatus of the image file of the embodiment of the invention;
Fig. 3 is the structured flowchart of the download apparatus of image file according to the preferred embodiment of the invention;
Fig. 4 is the structured flowchart according to the STB of the embodiment of the invention;
Fig. 5 is the sketch map according to the method for the IPTV set top box upgrading downloading rate self adaptation adjustment of the embodiment of the invention two;
Fig. 6 is the sketch map according to the IPTV set top box upgrading inside modules handling process of the embodiment of the invention three.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
According to the embodiment of the invention, a kind of method for down loading of image file is provided.Fig. 1 is the flow chart according to the method for down loading of the image file of the embodiment of the invention, and is as shown in Figure 1, and this method comprises:
Step S102, STB use the specified network bandwidth to the data of server requests download with the image file of the corresponding length of specified network bandwidth, and wherein, image file is binary application program;
Step S104; The length of the data of the image file that STB returns according to server obtains the current network bandwidth; And according to the employed network bandwidth of current network bandwidth definite request next time download image file; Wherein, the employed network bandwidth of request download image file is less than or equal to the current network bandwidth next time;
Step S106, STB will ask to download the employed network bandwidth of image file as the specified network bandwidth next time, and repeated execution of steps S102 and step S104 download completion until whole image file.
Pass through above-mentioned steps; Adopt the gradation request to download designated length image file data; Adjust the mode of download network speed in real time; The problem that when having solved STB download and upgrade image file in the correlation technique other equipment in the IP network has been impacted has been guaranteed the quick completion of upgrading, has improved the fluency of network.
For example, the employed network bandwidth of request download image file can be 80% of current network bandwidth next time.This method is that Network Transmission is reserved 20% redundancy, can improve transmission rate so that Network Transmission is more unimpeded.
Preferably, in step S102, STB obtains the length of the per second transmission binary system byte corresponding with this speed according to specified network bandwidth calculation and specified network bandwidth rate corresponding; STB is to the data of the image file of the length of this binary system byte of server requests download.For example, the specified network bandwidth is 5M, and then rate corresponding is the 640K byte per second, that is, the length that image file is downloaded in the STB request can be 640K.This method realizes simple, workable.
Preferably; In step S104; If the length of the data of the image file that the length of the data of the image file that server returns is downloaded less than the STB request, the corresponding network bandwidth of the length of the data of the image file that then will return with server is as the current network bandwidth; If the length of the data of the image file that server returns equals the length of the data of the image file that the STB request downloads; Then calculate the needed time of length of the data of the image file of downloading STB request download, and according to this time adjustment current network bandwidth.Wherein, Calculate the needed time of length of the data of the image file of downloading STB request download; And can comprise: if should (in implementation process, can this threshold value be made as 1 second especially, the time less than predetermined threshold according to this adjustment current network bandwidth time; Realize simple like this; Can directly reflect speed from bandwidth), the length of the data of the image file of then the STB request being downloaded increases by first predetermined value, and the network bandwidth that will be corresponding with increasing by first predetermined value is as the current network bandwidth; If should the time more than or equal to predetermined threshold, the length of the data of the image file of then the STB request being downloaded reduces by second predetermined value, and the network bandwidth that will be corresponding with reducing by second predetermined value is as the current network bandwidth.
This preferred embodiment can be downloaded the length of image file through the adjustment of current network bandwidth self-adaption ground, so that Network Transmission is smooth more, and the flexibility that has improved system.
Preferably, after step S106, the whole image file that is loaded in down in the STB internal memory is saved among the FLASH, restarts STB.
In implementation process, STB and server can adopt http protocol to carry out method for down loading.
Corresponding to said method, the embodiment of the invention also provides a kind of download apparatus of image file.Fig. 2 is the structured flowchart according to the download apparatus of the image file of the embodiment of the invention; As shown in Figure 2; This device 20 comprises: request module 22; Be used to use the specified network bandwidth to the data of server requests download with the image file of the corresponding length of specified network bandwidth, wherein, image file is binary application program; Determination module 24; Be coupled to request module 22; The length of the data of the image file that is used for returning according to server obtains the current network bandwidth; And according to the employed network bandwidth of current network bandwidth definite request next time download image file, wherein, request is next time downloaded the employed network bandwidth of image file and is less than or equal to the current network bandwidth; Download module 26 is coupled to determination module 24, is used for request is next time downloaded the employed network bandwidth of image file as the specified network bandwidth, and indication request module and determination module repeat, and downloads until whole image file and accomplishes.
Fig. 3 is the structured flowchart of the download apparatus of image file according to the preferred embodiment of the invention; As shown in Figure 3; Determination module 24 also comprises: adjustment unit 242; Be used under the situation of the length of the data of the image file that the length of the data of the image file that server returns is downloaded less than the STB request, the corresponding network bandwidth of the length of the data of the image file that will return with server is as the current network bandwidth; And equal in the length of the data of the image file that server returns under the situation of length of data of the image file that the STB request downloads; Calculate the needed time of length of the data of the image file of downloading STB request download, and according to this time adjustment current network bandwidth.
According to the embodiment of the invention, a kind of STB is provided also.Fig. 4 is the structured flowchart according to the STB of the embodiment of the invention, and is as shown in Figure 4, and this STB comprises the download apparatus 20 of above-mentioned image file.
Be elaborated below in conjunction with preferred embodiment and accompanying drawing implementation procedure to the foregoing description.
Embodiment one
Present embodiment provides a kind of method and system of interactive internet protocol television (IPTV) set top box (STB) data download; Be applicable to the upgrading of IPTV STB, solve the situation of not considering the network bandwidth when having the implementation method data download now, avoid other IP network equipment is produced impact.And present embodiment more can embody its value in IPTV upgrading field.
Before the description technique scheme, the term below defining earlier:
(1) downloads: refer to the data that STB initiatively obtains head end server here, a kind of behavior of handling, showing.
(2) upgrade software mirror image: be exactly an independently file in fact, different with alternative document, it is a binary value, is the software of STB, and the inside comprises the binary application program of STB, can carry out alone, last tens Mbytes of general size.
In implementation process, the method for the STB downloading rate self adaptation adjustment in the present embodiment can be used http protocol, and this method can comprise the steps:
Step 1, STB starts downloading process.
Step 2, the real-time judge network bandwidth, the data of being asked are downloaded in gradation, accomplish until whole downloading process.
Step 3, after having downloaded, can also be to the further processing of data download.
Particularly, the bandwidth of supposing in-home is 2M (speed is 2Mbps), and just per second is downloaded the data of 256K byte.Particularly, at first, downloading process attempts asking the data of 256K byte first, if the data length of response explains that less than 256K the network bandwidth is not abundant, this just receives the data of institute's response length so; If during the data of this request 256K byte, the data length that server responded is exactly 256K, explains that so the network bandwidth is good, this just receives the data of 256K length.Secondly, downloaded the back and calculated the needed time of data of downloading 256K length, if less than one second, explained that bandwidth is abundant, the data volume of request next time can increase so, will be greater than the 256K byte length.If the time that the data of download 256K byte length need greater than one second, explains that the network bandwidth is crowded, the data volume that receives next time so reduces.Then, the concrete length of setting next data download amount is 80% of network true bandwidth, leaves 20% bandwidth redundancy.
Concrete downloading rate calculated relationship can be network real-time bandwidth/actual download time, and wherein, the network real-time bandwidth unit is bytes, and the unit of actual download time is a millisecond, and the downloading rate unit that calculates is bps.
For example, the data volume length that asked next time can be the length that calculated last time, if the length that the length of server response equals to ask explains that the network bandwidth is good, so just receives the data volume of institute's response length; If the length that server responded explains that less than the length of request the network bandwidth is poor, so also receive the data volume of institute's response length.And, after receiving, real-time update network bandwidth this moment.Next time, the data length of download request was 80% of the network bandwidth.After just each the download, upgrade the bandwidth of network, next data downloaded amount length is 80% of the network bandwidth.Process above repeating is accomplished until whole download.
It is thus clear that; The described downloading rate self adaptation of present embodiment is the method for adjustment dynamically; More be applicable to the IPTV set top box upgrading of HTTP mode; In the time of can avoiding data download the miscellaneous equipment in the IP network is produced shock effect, download can be accomplished as early as possible and the miscellaneous equipment in the network is not produced shock effect.
Embodiment two
In the present embodiment, adopt the HTTP download protocol, STB and upgrade server must be supported http protocol.Fig. 5 is that as shown in Figure 5, this method can comprise the steps: according to the sketch map of the method for the IPTV set top box upgrading downloading rate self adaptation adjustment of the embodiment of the invention two
Step S501, STB attempt asking the data of 256K byte length first, and STB is not true data download in this step, just the responding ability of detecting server.
Step S502,206 answer code OK are returned in the upgrade server response.The length of upgrade server response might be smaller or equal to 256K.
Step S503, this receives the data of response length last time STB from server.
Step S504, STB preserve this data package length in internal memory, and calculate network true bandwidth this moment, and the data volume length of download request is 80% of network true bandwidth.
Step S505 by the download length that network true bandwidth this moment calculates, attempts the data volume of this length of request.
Step S506, server respond 206 answer code OK, return the true response length of server.
Step S507 is from the data of server reception response length last time.
Step S508, STB preserve this data package length in internal memory, and calculate network true bandwidth this moment.After the network true bandwidth is downloaded a part of data at every turn, calculate with regard to real-time update.
Step S509, the step above repeating is downloaded completion until whole mirror image.
Step S510 is saved in the mirror image of downloading in the storage medium.
Embodiment three
Fig. 6 is that as shown in Figure 6, this flow process can comprise the steps: according to the sketch map of the IPTV set top box upgrading inside modules handling process of the embodiment of the invention three
Step S601 is after set-top box judging has upgradeable version;
Step S602, releasing memory is downloaded the preceding processing of mirror image;
Step S603, through network mode downloaded software release image in internal memory;
Step S604 after having downloaded, is saved in storage medium with the Software Mirroring in the internal memory, in flash;
Step S605, STB is restarted in the processing after upgrading.
It is thus clear that the method for IPTV STB downloading rate self adaptation adjustment is compatible good in the present embodiment; Can be applicable to the upgrading field, the rapidity of upgrading is guaranteed in upgrading that can compatible various IP STBs; And scheme is simple, is easy to realize, can be realized by the STB side fully.And be easy to promote, be generalized to mass data is downloaded in other multimedia terminal of IP network through the HTTP mode occasion easily.
In sum; The embodiment of the invention provides a kind of system and method for IPTV STB downloading rate self adaptation adjustment; Especially be applicable to the upgrading of IPTV STB; Might produce other IP network equipment when having solved existing network mode data download and impact, cause the crowded problem of bandwidth, make the data of IPTV STB download the miscellaneous equipment that to accomplish as early as possible and not influence in the network.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for down loading of an image file is characterized in that, comprising:
Step S102, STB use the specified network bandwidth to the data of server requests download with the image file of the corresponding length of said specified network bandwidth, and wherein, said image file is binary application program;
Step S104; The length of the data of the said image file that said STB returns according to said server obtains the current network bandwidth; And according to the employed network bandwidth of said current network bandwidth definite request next time said image file of download; Wherein, the employed network bandwidth of the said said image file of download of request next time is less than or equal to said current network bandwidth;
Said STB is downloaded the employed network bandwidth of said image file as said specified network bandwidth with said request next time, and repeated execution of steps S102 and step S104 download completion until whole said image file.
2. method according to claim 1 is characterized in that, said STB uses said specified network bandwidth to comprise to the data of said server requests download with the said image file of the corresponding length of said specified network bandwidth:
Said STB obtains the length of the per second transmission binary system byte corresponding with this speed according to said specified network bandwidth calculation and said specified network bandwidth rate corresponding;
Said STB is to the data of the said image file of the length of said this binary system byte of server requests download.
3. method according to claim 1 is characterized in that, it is 80% of said current network bandwidth that the employed network bandwidth of said image file is downloaded in said request next time.
4. method according to claim 1 is characterized in that, in step S104,
If the length of the data of the said image file that the length of the data of the said image file that said server returns is downloaded less than said STB request, the corresponding network bandwidth of the length of the data of the said image file that then will return with said server is as said current network bandwidth;
If the length of the data of the said image file that said server returns equals the length of the data of the said image file that said STB request downloads; Then calculate to download the needed time of length of the data of the said image file that said STB request downloads, and adjust said current network bandwidth according to this time.
5. method according to claim 4 is characterized in that, calculate to download the needed time of length of the data of the said image file that said STB request downloads, and adjusts said current network bandwidth according to this time and comprise:
If should the time less than predetermined threshold, the length of the data of the said image file of then said STB request being downloaded increases by first predetermined value, and the network bandwidth that will be corresponding with increasing said first predetermined value is as said current network bandwidth;
If should the time more than or equal to said predetermined threshold, the length of the data of the said image file of then said STB request being downloaded reduces by second predetermined value, and the network bandwidth that will be corresponding with reducing said second predetermined value is as said current network bandwidth.
6. according to each described method in the claim 1 to 5, it is characterized in that, after whole said image file is downloaded completion, also comprise:
The whole said image file that is loaded in down in the said STB internal memory is saved among the FLASH, restarts said STB.
7. method according to claim 6 is characterized in that, said STB and said server adopt http protocol to carry out said method for down loading.
8. the download apparatus of an image file is characterized in that, comprising:
Request module is used to use the specified network bandwidth to the data of server requests download with the image file of the corresponding length of said specified network bandwidth, and wherein, said image file is binary application program;
Determination module; The length of the data of the said image file that is used for returning according to said server obtains the current network bandwidth; And according to the employed network bandwidth of said current network bandwidth definite request next time said image file of download; Wherein, the employed network bandwidth of the said said image file of download of request next time is less than or equal to said current network bandwidth;
Download module is used for said request is next time downloaded the employed network bandwidth of said image file as said specified network bandwidth, and indication described request module and said determination module repeat, and download until whole said image file and accomplish.
9. device according to claim 8 is characterized in that, said determination module also comprises:
Adjustment unit; Be used under the situation of the length of the data of the said image file that the length of the data of the said image file that said server returns is downloaded less than said STB request, the corresponding network bandwidth of the length of the data of the said image file that will return with said server is as said current network bandwidth; And equal in the length of the data of the said image file that said server returns under the situation of length of data of the said image file that said STB request downloads; Calculate to download the needed time of length of the data of the said image file that said STB request downloads, and adjust said current network bandwidth according to this time.
10. a STB comprises claim 8 or 9 described download apparatus.
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