CN1929462A - Device and method for digital household network media format transcoding - Google Patents
Device and method for digital household network media format transcoding Download PDFInfo
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Abstract
This invention relates to one digital house network media for conversion device and method, wherein, the device compress parameter computation module, strategy control module, network sensor module, conversion module; the method comprises the following steps: receiving media service parameter package and media materials parameters package by parameter computation module; monitoring network transmission signal channel information, network route and each code servo business through network sensor module to provide strategy control module to generate controllable network transmission signal channel through streamline principle to fulfill media form strategy.
Description
Technical field
The invention belongs to digital home network technical field and media format conversion technical field, particularly relate to a kind of media format code transferring device and code-transferring method that is applied in the digital home network.
Technical background
Digital home network refers to a kind of new technology that in home-ranges PC PC, household electrical appliances, safety system, illuminator and wide area network is connected.Purpose is to make between each PC, household electrical appliances and other instruments to realize information sharing, works in coordination to allow the user can grasp the household equipment situation easily and allow household equipment be user's service better.
Digital home network is the notion that occurred in the last few years, and along with the development of 3C integration technology, digital home network more and more receives the attention and the concern of industry.3C merges, be meant computer (Computer), communication (Communication), consumer electronics product (Consumer Electrics), interpenetrate each other and merge, realize information sharing, make things convenient for the user on a unified operating platform, equipment and information to be operated, should be used for making things convenient for the life of oneself at any time and any place by associating information thereby satisfy people.
In digital home network, in order to make between the network of isomery, between different types of the accessing terminal and can seamless link between the different media data format, thereby realize the function of universal multimedia visit.Media format code transferring has become the hot issue of digital home network research.
The disposal ability of different terminals, storage capacity and display capabilities have nothing in common with each other, and heterogeneous network is except that the bandwidth difference, and is also different with aspects such as loss rate at the error code bit rate.In addition, because the existence of various coding standards, a large amount of media datas is according to different Standards and formats compressed encodings, and distributed store is on different equipment.
In order to realize that the user can be pellucidly or interoperability ground access, issue and receiving media data, the inevitable requirement media data can be according to flexible conversion between the heterogeneous network that do not coexist of applied environment, the different terminals, comprises the conversion between the media data of conversion, the conversion between the different media formats and various criterion compression of conversion, spatial resolution of code check.The user can not consider the ability of network and terminal, and according to service quality (QoS), the realization different user terminals is by different network readezvous point ground requests and receive various media services.
Media format code transferring is in order to be suitable for no terminal owing to support the conversion of the media coding that the difference of form is carried out, and is a hot issue of studying present stage.At present the media format code transferring technology mainly is that the situation of carrying out transcoding on unit is many, at majority be the transcoding of video file format.And the media format code transferring great majority in Network Transmission also are on server or the enterprising row format transcoding of gateway of transmission, and transcoding work all is disposablely to finish on a machine.Simultaneously, be applied in the digital home network compare less.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of based on the distributed pipeline principle, at multiple different media resource, the step of having cut apart media format conversion effectively, it can be finished on different machines, in conjunction with network condition, make full use of bandwidth, realize the media format code transferring device of optimum transcoding.
Another object of the present invention is to provide the code-transferring method on a kind of transcoding device that runs on goal of the invention one.
In order to realize goal of the invention one, the technical scheme of employing is as follows:
A kind of digital household network media format transcoding device comprises:
Parameter calculating module is provided with the input interface of the media resource supplemental characteristic bag of the media services supplemental characteristic bag that is used for receiving media playing request terminal and media server and the output interface that result of calculation is sent to strategic control module;
Strategic control module receives the information that parameter calculating module and network aware module send by input interface, and is provided with the analytical calculation received information and forms the alternate strategies storehouse of the transcoding strategy of control transcoding module;
The network aware module, be provided with the bandwidth information of monitoring the Network Transmission channel, monitor network along the road each transcoding server and the busy extent of media termination and the input interface of the transcoding service mechanism that they had, and the output interface that snoop results is sent to strategic control module;
The transcoding module receives the transcoding strategy of strategic control module by input interface, and is sent to next node after according to the transcoding strategy media data being handled.
The content of the media services supplemental characteristic bag that described parameter calculating module received comprises the consensus standard that the media categories of computing capability, display capabilities, memory size, the request of requesting terminal, media formats, the bit rate itself supported require and adopt, and with respect to specific medium exclusive color figure place, frame per second, screen size, resolution, number of channels, text line number; The content of the media resource supplemental characteristic bag that is received comprises media categories, media formats, bit rate and color figure place, frame per second, screen size, resolution, number of channels, the text line number identical with media services supplemental characteristic bag after computing capability, the current media resource of media server are handled through media server and along the road transcoding server.
The media resource supplemental characteristic bag that sends on media services supplemental characteristic bag that parameter calculating module transmits according to demanding terminal and the media server calculates the unsolved switch process of resource Buddhist monk of these service needs.
The function of described sensing module is to monitor the bandwidth change of transfer channel, by obtaining current optimal path with the neighbouring node exchanging routing information, and understand along the road each transcoding server and the busy extent of media termination and the transcoding service mechanism that they had, and this information is transmitted and strategic control module.Media termination can be that the request end also can be a server.
Described strategic control module is the information that reception parameter calculating module and sensing module send, and send analytical calculation in the alternate strategies storehouse with these information, selects corresponding strategy that the transcoding module is carried out control corresponding then from the alternate strategies storehouse.
The analytical calculation that strategic control module carries out the information that receives comprises:
Busy extent, the transcoding mechanism of service request, phase-split network communication channel and each transcoding server that the analysis request terminal is required, according to form and the channel information prediction of classification and path downstream and the situation of transcoding server of the transcoding server media resource that residing position, path upstream send in network communication channels in place, form the transcoding strategy at the disposition that adds up on the media server or along other transcoding server on the road, media resource.
The transcoding strategy is considered more detailed changing the mechanism, and can be dynamically changes the work that this transcoding server should carry out according to the variation of network condition.And allow path that the whole piece media resource passes through just just as streamline, at last media resource is converted to the media formats that terminal that suitable bit rate size, resolution and color figure place or the like require can be supported, but each transcoding server not the work of all only doing repetition again.Because intersecting, complicated several streamlines of nothing of whole network form, and each bar streamline is all constantly changing the path, so transcoding server is not only on the streamline but also on an other streamline, they all must carry out itself as the role on a certain the streamline, also will take into account as the role on another streamline.
The transcoding mechanism of transcoding module of the present invention is: if the format conversion between support media server and the requesting terminal on the transcoding server, then directly conversion; Otherwise the media data that media server is sent converts the intermediate form data of consolidation form to, or the intermediate form data transaction is become the desired form in requesting terminal.So, be divided into three kinds of situations usually, a kind of is after receiving former formatted file, changes into file destination if the transcoding mechanism of the transcoding server at place satisfies source file, then directly conversion; Another kind is if source file can not be directly changed into file destination, then source file is converted to the intermediate form file, again the intermediate form file is sent to website; If the file that receives is the intermediate form file, show that then this document sends from a last website, through at least once having changed, become file destination with the intermediate form file conversion this moment.Certainly, file is at transport process, and the website that is sent to is all controlled by strategic control module.
Described transcoding module machine also comprises when the media formats of being asked can't be play in the requesting terminal, the form that transcoding server also becomes the requesting terminal to support the media format conversion of being asked automatically.For example adopt the video of consolidation form, convert extended formatting to, will consider that so can terminal support video.If could not would carry out the cut-away view picture, the conversion by the color figure place, the steps such as conversion, resolution processes and bit rate adjustment of picture format then.If the conversion between the video format, will carry out the steps such as adjusting of conversion, frame rate adjustment, resolution processes and the bit rate of video format so.
In order to realize goal of the invention two, the technical scheme of employing is:
A kind of digital household network media format transcoding method, receive and the media services supplemental characteristic bag of analyzing medium playing request terminal and the media resource supplemental characteristic bag of media server by parameter calculating module, and monitor the bandwidth information of Network Transmission channel and network along the busy extent of each transcoding server of road and the transcoding service mechanism that they had by the network aware module, generate a plurality of transcoding servers on the may command Network Transmission channel are finished media format conversion jointly by the streamline principle transcoding strategy for strategic control module.
In the technique scheme, the streamline principle of described transcoding strategy is presented as that each transcoding server on the transmission channel finishes the part of whole transcoding process, is resent on next transcoding server.
The transcoding service mechanism of described transcoding server can adopt the bridge of unified intermediate medium form as transcoding, the former format conversion that is specially medium becomes the intermediate medium form, again the intermediate medium format conversion is become object format, or directly former format conversion is become object format.
The present invention is directed to the multiple media resource format code transferring problem in the digital home network, a kind of thought based on distributed streamline has been proposed, regard the network path between media server and the terminal as a streamline, and media transcoding is divided into different steps, and regard the transcoding server on the path as processing component, they cooperate to finish jointly transcoding work.For each transcoding server, the transcoding step that they are responsible for is again according to the network condition dynamically changeable.The invention allows for a kind of unified media formats, reduced and changed the mechanism, satisfy the requirement of transcoding server with different switching mechanism, and the method that has proposed a kind of mandatory conversion, the conversion of the media resource that some is different classes of supported.
Technical characterstic of the present invention is as follows:
1, thought based on Distributed Calculation, adopt the principle of streamline, conversion for media formats in the transport process, accomplish to allow the transcoding server on the different transmission channels can be according to the real-time bandwidth situation of channel, busy extent decision media format conversion, color conversion, conversion of resolution and transmit these several job steps of bit rate adjustment along the distribution on the transcoding server of road, may all need adjust when the channel by different bandwidth as for this step of bit rate adjustment, so just can reach the transcoding purpose that makes full use of bandwidth and the optimum by different channels.Have the terminal of format conversion function for some, transcoding server also can allow format conversion be operated in to carry out on the terminal or carry out on transcoding server.And for the terminal that does not possess the format conversion function, then transcoding server necessarily is responsible for its format conversion work.
2, adopt the bridge of unified media formats as format conversion.Traditional media format conversion, employing be the way of format conversion in twos, if exist the file of n kind form, then need (n-1) 2 kinds of format conversion mechanism.If all medium of original form, comprise that text, image, video, audio frequency all convert thereof into unified format earlier, convert the target medium form again to, then the conversion between them only needs 2n kind format conversion mechanism.For media formats diversified today, provide effective assurance for reducing media format conversion mechanism.Certainly, for itself having the transcoding server of directly changing the mechanism between two forms, can change by unified media formats.But for the transcoding server that does not have directly to change the mechanism between two forms, this method is one well to be selected, and also can save hardware or resource effectively simultaneously.
3, the function that has mandatory conversion, transcoding server is except can correctly changing according to the media formats that terminal system requires, can also carry out mandatory conversion automatically according to the different medium support of terminal, for example when certain terminal to apply some video resource but when itself can not handle video format again, transcoding server can change video automatically forcibly change suitable picture format, color size, resolution into and transmit bit rate and also can show by this terminal.
Description of drawings
Fig. 1 is a transcoding apparatus structure block diagram of the present invention;
Fig. 2 is a strategic control module fundamental diagram of the present invention;
Fig. 3 is a transcoding module fundamental diagram of the present invention;
Fig. 4 is service procedure figure of the present invention;
Fig. 5 is an application implementation structural representation of the present invention.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
The structured flowchart of transcoding device of the present invention comprises parameter calculating module, strategic control module, network aware module, transcoding module as shown in Figure 1.
The media resource supplemental characteristic bag that sends on media services supplemental characteristic bag that parameter calculating module transmits according to demanding terminal and the media server calculates the unsolved switch process of resource Buddhist monk of these service needs, and the result that parameter calculating module will calculate is transmitted in transcoding module and strategic control module.
The function of sensing module is to monitor the bandwidth change of transfer channel, by obtaining current optimal path with the neighbouring node exchanging routing information, and understand along the road each transcoding server and the busy extent of media termination and the transcoding service mechanism that they had, and this information is transmitted and strategic control module.
Strategic control module is the information that reception parameter calculating module and sensing module send, and send analytical calculation in the alternate strategies storehouse with these information, selects corresponding strategy that the transcoding module is carried out control corresponding then from the alternate strategies storehouse.
What the transcoding module was responsible for is the format conversion process of media resource.The present invention adopts the streamline principle, and the format code transferring process is responsible for by a plurality of transcoding server segmentations.
Strategic control module operation principle of the present invention as shown in Figure 2, the alternate strategies storehouse receives parameter information and the network condition information that strategic control module is sent here, carry out the parameter analysis, determine the busy extent of service request that processing terminal is required and phase-split network communication channel and each transcoding server, transcoding mechanism and s own situation, according to this transcoding server residing status in transfer channel, the media resource that sends on the path upstream is in the disposition that adds up on the media server or along other transcoding servers on the road, the form of media resource and classification and the next possible channel information prediction on the path downstream and the situation of transcoding server, determine the work that this transcoding server should carry out, comprise the format conversion strategy, conversion reprocessing strategy and bit rate adjustment strategy.
Transcoding module operation principle of the present invention as shown in Figure 3, what the transcoding module was responsible for is the format conversion process of media resource, what show in this figure is a functional block diagram of conversion fully.For different media resources, at first pass through certain preliminary treatment, for example can check herein that whether impaired data etc.The step strategy that is sent by strategic control module carries out the conversion on certain step then, and this is that characteristics by the streamline that adopts among the present invention decide.If media resource carries out transcoding fully on a certain transcoding server.Then transcoding server determines at first whether media resource is the coding of consolidation form or the coding of general extended formatting, and the identification media resource is which kind of medium (audio frequency, video, image, texts etc.), determines which kind of form media resource will convert to.For example adopt the video of consolidation form, convert extended formatting to, will consider that so can terminal support video.If could not would carry out the cut-away view picture, the conversion by the color figure place, the steps such as conversion, resolution processes and bit rate adjustment of picture format then.If the conversion between the video format, will carry out the steps such as adjusting of conversion, frame rate adjustment, resolution processes and the bit rate of video format so.
Service control flow of the present invention specifically comprises the steps: as shown in Figure 4
A, demanding terminal media server provide medium resource service, and medium resource service enters the present stage transcoding server by the server process of itself and the transcoding server of other path upstream, change b;
B, transcoding server carry out computational analysis to the supplemental characteristic bag, change c;
C, analyze in conjunction with network condition, change d according to the result of calculation of parameter;
D, analysis path upstream be to the disposition of media resource, confirms the classification, form of media resource etc. simultaneously, determines to adopt which kind of strategy that media resource is carried out conversion process, changes e;
E, media resource is carried out respective handling and is sent to the transmission path downstream, change f;
F, end.
Application implementation structural representation of the present invention is only supported general picture format and can not be supported video format as the mobile phone of playback terminal among the figure, and do not have any format conversion mechanism on the mobile phone as shown in Figure 5; On the contrary, the form on the Media Resource Server of request is to be video format, and itself has format conversion mechanism on the Media Resource Server.
During beginning, mobile phone sends a medium request data package, comprised wherein that the media categories of disposal ability computing capability, display capabilities, memory size, the request of mobile phone, media formats, the bit rate itself supported require and the consensus standard that adopts etc., and color figure place, screen size, resolution, etc. parameter.
Media Resource Server is replied after receiving the medium request of mobile phone, and prepares to begin to transmit data, but because Media Resource Server itself is busier, so left format conversion work for along the road transcoding server.Media Resource Server also sends to transcoding server to the parameter of medium, the media categories after the computing capability, current media resource that comprises media server handled through media server and along the road transcoding server, media formats, bit rate and with color figure place, frame per second, screen size, resolution.
Strategic control module is according to parameter information, that selected media resource transfer path adopts is A-〉E-〉F-〉this paths of G, so just by A, E, these four transcoding servers of F, G intercom mutually understand each other busy extent and each other the bandwidth or the like of link carry out the distribution of convert task, specifically comprise format conversion, color conversion, conversion of resolution, bit rate conversion or the like.Cooperatively interact between them and forcibly the media resource of video format is converted to and be fit to the picture format that mobile phone is browsed.
Also may be in the process that transmits because considering aspect bandwidth relationship or the QoS assurance, reselect different paths, how canal path does not change, and still will finish the transfer process of media resource according to network condition and busy extent separately along the transcoding server on the road.
Claims (8)
1, a kind of digital household network media format transcoding device is characterized in that comprising:
Parameter calculating module is provided with the input interface of the media resource supplemental characteristic bag of the media services supplemental characteristic bag that is used for receiving media playing request terminal and media server and the output interface that result of calculation is sent to strategic control module;
Strategic control module receives the information that parameter calculating module and network aware module send by input interface, and is provided with the analytical calculation received information and forms the alternate strategies storehouse of the transcoding strategy of control transcoding module;
The network aware module, be provided with the bandwidth information of monitoring the Network Transmission channel, monitor network along the road each transcoding server and the busy extent of media termination and the input interface of the transcoding service mechanism that they had, and the output interface that snoop results is sent to strategic control module;
The transcoding module receives the transcoding strategy of strategic control module by input interface, and is sent to next node after according to the transcoding strategy media data being handled.
2, digital household network media format transcoding device according to claim 1, the content that it is characterized in that the media services supplemental characteristic bag that described parameter calculating module receives comprises the consensus standard that the media categories of computing capability, display capabilities, memory size, the request of requesting terminal, media formats, the bit rate itself supported require and adopt, and with respect to specific medium exclusive color figure place, frame per second, screen size, resolution, number of channels, text line number; The content of the media resource supplemental characteristic bag that is received comprises media categories, media formats, bit rate and color figure place, frame per second, screen size, resolution, number of channels, the text line number identical with media services supplemental characteristic bag after computing capability, the current media resource of media server are handled through media server and along the road transcoding server.
3, digital household network media format transcoding device according to claim 1 and 2 is characterized in that the analytical calculation that described strategic control module carries out the information that receives comprises:
Busy extent, the transcoding mechanism of service request, phase-split network communication channel and each transcoding server that the analysis request terminal is required, according to form and the channel information prediction of classification and path downstream and the situation of transcoding server of the transcoding server media resource that residing position, path upstream send in network communication channels in place, form the transcoding strategy at the disposition that adds up on the media server or along other transcoding server on the road, media resource.
4, digital household network media format transcoding device according to claim 3 is characterized in that described transcoding module machine is: if the format conversion between support media server and the requesting terminal on the transcoding server, then directly conversion; Otherwise the media data that media server is sent converts the intermediate form data of consolidation form to, or the intermediate form data transaction is become the desired form in requesting terminal.
5, digital household network media format transcoding device according to claim 4, it is characterized in that described transcoding module machine also comprises when the media formats of being asked can't be play in the requesting terminal, the form that transcoding server also becomes the requesting terminal to support the media format conversion of being asked automatically.
6, a kind of digital household network media format transcoding method, it is characterized in that receiving and the media services supplemental characteristic bag of analyzing medium playing request terminal and the media resource supplemental characteristic bag of media server by parameter calculating module, and monitor the bandwidth information of Network Transmission channel by the network aware module, and network is finished the transcoding strategy of media format conversion jointly along the busy extent of each transcoding server of road and the transcoding service mechanism that they had by the streamline principle for a plurality of transcoding servers on the strategic control module generation may command Network Transmission channel.
7, digital household network media format transcoding method according to claim 6, the streamline principle that it is characterized in that described transcoding strategy is presented as that each transcoding server on the transmission channel finishes the part of whole transcoding process, is resent on next transcoding server.
8, according to claim 6 or 7 described digital household network media format transcoding methods, the transcoding service mechanism that it is characterized in that described transcoding server can adopt the bridge of unified intermediate medium form as transcoding, the former format conversion that is specially medium becomes the intermediate medium form, again the intermediate medium format conversion is become object format, or directly former format conversion is become object format.
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| CNB2006100366615A CN100502369C (en) | 2006-07-25 | 2006-07-25 | Device and method for digital household network media format transcoding |
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| CN101873482A (en) * | 2010-07-02 | 2010-10-27 | 上海交通大学 | Real-time streaming media cluster transcoding system |
| CN102223386A (en) * | 2010-04-16 | 2011-10-19 | 华为技术有限公司 | Method, device and system for remotely accessing home network |
| CN101938648B (en) * | 2009-10-15 | 2012-08-15 | 北京暴风科技股份有限公司 | Method and system for converting format of media file |
| CN102638705A (en) * | 2011-12-09 | 2012-08-15 | 中兴通讯股份有限公司 | Transcode parameter templating method and transcoding system of CMS (content management system) |
| CN102802053A (en) * | 2012-07-23 | 2012-11-28 | 深圳市融创天下科技股份有限公司 | Audio and video file transcoding cluster dispatching method and device |
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| CN101938648B (en) * | 2009-10-15 | 2012-08-15 | 北京暴风科技股份有限公司 | Method and system for converting format of media file |
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| CN101873482A (en) * | 2010-07-02 | 2010-10-27 | 上海交通大学 | Real-time streaming media cluster transcoding system |
| CN102638705A (en) * | 2011-12-09 | 2012-08-15 | 中兴通讯股份有限公司 | Transcode parameter templating method and transcoding system of CMS (content management system) |
| CN103379363B (en) * | 2012-04-19 | 2018-09-11 | 腾讯科技（深圳）有限公司 | Method for processing video frequency and device, mobile terminal and system |
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