CN103002339A - Method and device for acquiring demultiplexing data - Google Patents
Method and device for acquiring demultiplexing data Download PDFInfo
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- CN103002339A CN103002339A CN2012105181004A CN201210518100A CN103002339A CN 103002339 A CN103002339 A CN 103002339A CN 2012105181004 A CN2012105181004 A CN 2012105181004A CN 201210518100 A CN201210518100 A CN 201210518100A CN 103002339 A CN103002339 A CN 103002339A
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Abstract
The invention discloses a method and a device for acquiring demultiplexing data. The method comprises steps of receiving a user data request, classifying and caching demultiplexing data in accordance with data types and filter conditions of the user data request, distributing corresponding resource channels and filters for users in accordance with the user data request, requesting to acquire the required demultiplexing data from the caching in accordance with resource channels and filters by users, acquiring the required demultiplexing data from caching and transmitting the demultiplexing data to users. The demultiplexing data are classified and stored in advance and are managed, resources are distributed and data are transmitted in dynamically accordance with the user data request, the resource conflict is avoided, no blocked users exists when a plurality of uses requests data, and required data are provided for users timely and quickly.
Description
Technical field
The invention belongs to the digital television techniques field, specifically, relate to the data processing technique in digital television techniques field, more particularly, relate to obtain method, device and the digital television receiver of demultiplexed data.
Background technology
At present, the application of the digital television receiver such as set-top box, all-in-one is more and more extensive, not only can play the audio/video flow data of broadcasting and TV front end transmission, can also realize tuning, show electronic program guide (EPG), roll titles etc., and the realization of all these application all be unable to do without obtaining of demultiplexed data.
For satisfying the demand data of the multiple application of digital television receiver, the demultiplexed data type is more, and different application often can need to obtain simultaneously one type data.Because at present demultiplexed data lacks unified management, when needing data, each leisure of a plurality of application directly from demultiplexed data, reads, and read in this application and can block other in the process and use these data are read the processing speed that impact is used.Therefore, a plurality of application often can occur competes same data and causes resource contention, all can not obtain fast the problem of data.Can not be fast if use, normally carry out, will affect digital television receiver user's the experience of watching, and then affect the popularization of digital television receiver.
Summary of the invention
The present invention is directed to for want of unified management of demultiplexed data in the prior art and cause easily the problems referred to above such as resource contention and data jamming, a kind of method and apparatus that obtains demultiplexed data is provided, by data are carried out unified management, speed and accuracy that the multi-user obtains data have simultaneously been improved.
For achieving the above object, method provided by the invention adopts following technical proposals to be achieved:
A kind of method of obtaining demultiplexed data, described method comprises the steps:
A1, receive user data requests, according to the data type in the user data requests and filtercondition with the demultiplexed data buffer memory of classifying;
A2, be the corresponding chnnels of resources of user assignment and filter according to user data requests;
A3, user are according to chnnels of resources and the required demultiplexed data of filter acquisition request from buffer memory;
A4, from buffer memory, obtain required demultiplexed data and be sent to the user of request msg.
Aforesaid method, if include the TS flow data that obtains a plurality of Packet Identifier in the described user data requests, in described step a4, at first from buffer memory, extract corresponding TS stream packets according to each Packet Identifier, then a plurality of TS stream packets are complex as a packet as the required demultiplexed data of user, again this demultiplexed data is sent to the user of request msg, thereby realizes that the user obtains the purpose of the TS flow data of a plurality of Packet Identifier simultaneously.
Aforesaid method for improving resource utilization, also comprises the steps: after described step a4
A5, user have obtained after the required data, discharge used filter, close used chnnels of resources.
Aforesaid method for further improving the effective management to user data requests, also comprised the steps: before described step a1
A0, the maximum number of user amount of obtaining simultaneously the same type data is set;
In described step a2, the maximum number of user amount that arranges according to user data requests and step a0 determines whether be the corresponding chnnels of resources of user assignment and filter.
Aforesaid method for further improving the speed that the user obtains demultiplexed data, in described step a1, when the user data requests that receives, judges whether first to exist identical request of data, if exist, directly carries out described step a4; If do not exist, carry out again described step a2, a3 and a4.
Aforesaid method, for further improving real-time and the accuracy of data acquisition, in described step a2, user data requests is sent in registered callbacks function mode; In described step a4, the demultiplexed data of obtaining from buffer memory is sent to the user of request msg in the call back function mode.
For realizing aforementioned goal of the invention, device provided by the invention adopts following technical proposals to realize:
A kind of device that obtains demultiplexed data, described device comprises:
Demultiplexing equipment is used for receiving the compound TS stream that the broadcasting and TV front end transmits, and compound TS stream is carried out demultiplexing, obtains demultiplexed data;
The demultiplexing rm-cell is connected with the user who needs demultiplexed data, is user resource allocation passage and filter for the reception user data requests, according to request of data;
The demultiplexed data taxon is conciliate the multiplexed resource administrative unit with demultiplexing equipment and is connected, and is used for according to the data type in the user data requests and filtercondition demultiplexed data being classified;
The demultiplexed data buffer unit is connected with the demultiplexed data taxon, is used for storing sorted demultiplexed data;
Demultiplexed data is obtained and transmitting element, be connected with the demultiplexed data buffer unit with the demultiplexing rm-cell, be used for from the demultiplexed data buffer unit, obtaining the required demultiplexed data of user and being sent to the user of request msg according to chnnels of resources and filter.
Aforesaid device, for improving resource utilization, described demultiplexing rm-cell also is used for the judgement user and whether obtains required data, and after the user has obtained required data, closes used chnnels of resources, reclaims used filter.
Aforesaid device, for further improving the speed that the user obtains demultiplexed data, described demultiplexing rm-cell is when receiving user data requests, judge whether first to exist identical request of data, if exist, directly the described demultiplexed data of control is obtained with transmitting element and is sent the required demultiplexed data of user to the user of request msg, if do not exist, is user resource allocation passage and filter again.
Aforesaid device, for further improving the effective management to user data requests, described device also comprises:
Parameter set unit is connected with described demultiplexing rm-cell, is used for arranging the maximum number of user amount of obtaining simultaneously the same type data; The demultiplexing rm-cell determines whether be user resource allocation passage and filter according to the parameters of user data requests and parameter set unit when receiving user data requests.
Compared with prior art, advantage of the present invention and good effect are: the present invention classifies demultiplexed data in advance, stores, carry out unified management, then according to user data requests dynamic assignment resource and transmission data, avoided resource contention, guarantee that a plurality of users' while request msgs are not have the user who gets clogged, for the user provides desired data in real time, quickly.
After reading the specific embodiment of the present invention by reference to the accompanying drawings, other characteristics of the present invention and advantage will become clearer.
Description of drawings
Fig. 1 is the structured flowchart that the present invention obtains an embodiment of device of demultiplexed data;
Fig. 2 is the flow chart that the present invention obtains an embodiment of method of demultiplexed data.
Embodiment
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is described in further detail.
Please refer to Fig. 1, this Figure 1 shows that the present invention obtains the structured flowchart of an embodiment of device of demultiplexed data.Obtaining of the described demultiplexed data of device of this embodiment, refer to that various different application users obtain by the data after the demultiplexing equipment demultiplexing, this device is exactly to be different application user service, is convenient to a plurality of users and gets access in time, quickly and accurately the required demultiplexed data of application.
As shown in Figure 1, to obtain the device of demultiplexed data included cellular construction, annexation each other and function as follows for this embodiment:
Demultiplexing rm-cell 15, this unit is as the core of device, be connected with the user 17 who needs demultiplexed data, be used for receiving user data requests, and be user resource allocation passage and filter according to request of data, so that the relevant resource of unified management realizes unified management and distribution to demultiplexed data.When the application of installation of this embodiment is in the digital television receivers such as set-top box, user 17 includes a plurality of application that need demultiplexed data, push next audio/video flow etc. such as tuning, roll titles, broadcast front end, each user is connected with demultiplexing rm-cell 15 respectively.
Demultiplexed data buffer unit 13 is connected with demultiplexed data taxon 12, is used for storing sorted demultiplexed data.
In addition, for improving resource utilization, demultiplexing rm-cell 15 also is used for judging whether the user obtains required data, and after the user has obtained required data, close used chnnels of resources, reclaim used filter, so that limited resource is distributed to other users.
In addition, for further improving the speed that the user obtains demultiplexed data, demultiplexing rm-cell 15 judges whether first to exist identical request of data when receiving user data requests.If exist, because identical corresponding chnnels of resources, filter and the demultiplexed data of request of data is identical, in the case, do not need to redistribute resource, can directly control demultiplexed data is obtained with transmitting element 16 sends and identical request of data is asked data, be that the required demultiplexed data of user is to the user of request msg yet.If there is not identical request of data, be user resource allocation passage and filter again.
Demultiplexed data is obtained and transmitting element 16, be connected with demultiplexed data buffer unit 13 with demultiplexing rm-cell 15, be used for from demultiplexed data buffer unit 13, obtaining the required demultiplexed data of user according to chnnels of resources and filter that demultiplexing rm-cell 15 distributes for user 17, and send data to the user 17 of request msg.
If include the TS flow data that obtains a plurality of Packet Identifier in the user data requests that receives, demultiplexed data is obtained with transmitting element 16 will extract corresponding TS stream packets according to each Packet Identifier from demultiplexed data buffer unit 13, then a plurality of TS stream packets are complex as a packet as the required demultiplexed data of user, again this demultiplexed data are sent to the user 17 of request msg.
As the further optimization of technical scheme, the device of this embodiment also includes the parameter set unit 14 that is connected with demultiplexing rm-cell 15, is used for arranging the maximum number of user amount of obtaining simultaneously the same type data.Demultiplexing rm-cell 15 will determine according to the parameters of user data requests and parameter set unit whether be user resource allocation passage and filter when receiving user data requests.In addition, can also the maximum number of once obtaining the TS stream packets be set by parameter set unit 14, so that rationally control and distribution T S stream packets.
Utilize the device of said structure obtain demultiplexed data concrete grammar can with reference to method flow diagram shown in Figure 2 and below to the description of Fig. 2 flow process.
Please refer to Fig. 2, this Figure 2 shows that the present invention obtains the flow chart of an embodiment of method of demultiplexed data, obtaining of the said demultiplexed data of this embodiment, also be with the stream of the playing audio-video in the digital television receiver, show the various different application such as electronic program guides, roll titles, picture and text as the user, each user obtains a kind of data acquisition by the data after the demultiplexing equipment demultiplexing.This embodiment is based on the device of Fig. 1, provides demultiplexed data in the mode of dynamic management and distribution as a plurality of users.
As shown in Figure 2, to obtain the process of demultiplexed data as follows for this embodiment:
Step 201: flow process begins.
Step 202: start demultiplexing equipment, carry out demultiplexing with the compound TS stream to the transmission of broadcasting and TV front end, obtain demultiplexed data.
Step 203: the maximum number of user amount of obtaining simultaneously the same type data and the number of once obtaining the TS stream packets are set.
The TS stream packets here mainly refers to audio/video flow packet that the broadcasting and TV front end pushes by compound TS stream and the private data bag of definition.This step by the maximum number of user amount of obtaining simultaneously the same type data is set, can be managed a plurality of user data requests, the data of reasonable distribution different user request better as optional Optimization Steps of this embodiment.By the number of once obtaining the TS stream packets is set, can when requiring data packet transmission speed, the request of data user rationally not control and distribute data on the one hand, can for the user provides the data transmission bauds reference, rationally adjust the speed of obtaining demultiplexed data to make things convenient for the user on the other hand.
Step 204: receive user data requests, according to the data type in the user data requests and filtercondition with the demultiplexed data buffer memory of classifying.
For digital television receivers such as set-top box, data after the demultiplexing have generally comprised the PES flow datas such as the TS flow data such as section data, the audio frequency and video such as PSI/SI and captions, and these data can be classified according to the difference of its Packet Identifier (PID) and filtercondition.
For the user who needs TS flow data and PES flow data, the user can send Packet Identifier, and this Packet Identifier has namely reflected the needed data of user.And for user's request that needs obtain the section data, after the transmission Packet Identifier, also need to send filtercondition.And in this embodiment, user data requests preferably adopts the mode of registered callbacks function to send.
Step 205: after receiving user data requests, judge that whether the user of request of data of the same type is greater than the maximum number of user amount.If, execution in step 206; Otherwise, go to step 207.
As mentioned above, can judge the whether data of acquisition request same type of different user by the Packet Identifier in the user data requests and filtercondition.
Step 206: the user of request of data of the same type during greater than default maximum number of user amount, for avoiding occuring resource contention, affect data transfer rate, the response of active user's request of data will be suspended, wait for that other user's end data of obtaining data of the same type obtain, until the user of request of data of the same type is not more than the maximum number of user amount.
Step 207: when the user of request of data of the same type is not more than default maximum number of user amount, illustrate that user data requests within controlled scope, then responds this request of data.And, at first, judge whether to exist the identical data request.If exist, go to step 210; Otherwise, execution in step 208.
Step 208: if there is no identical data request is user resource allocation passage and filter according to request of data then.
Specifically, be to be the corresponding chnnels of resources of user assignment according to the Packet Identifier in the user data requests, be the corresponding filter of user assignment according to the filtercondition in the user data requests.Certainly, if request of data does not comprise filtercondition for obtaining TS flow data or PES flow data in the request of data, therefore, can not be its dispense filter device yet.
Step 209: chnnels of resources and the filter information of distributing feed back to the user, the user will be according to corresponding chnnels of resources and filter the demultiplexed data of acquisition request respective type from buffer memory.
Step 210: from buffer memory, obtain required demultiplexed data, be sent to the user of request msg.
Preferably, for the user who sends request of data in the mode of registered callbacks function, demultiplexed data will be sent to this user in the call back function mode.
Judge when having the identical data request in step 207, execution in step 208 and 209 no longer, but directly carry out this step 210.The purpose of doing like this is: because the channel resource that identical request of data needs is identical with filter, needed demultiplexed data also is identical, therefore, when having the identical data request, the demultiplexed data that is sent to formerly identical data request user directly can be sent to current data request user, save for the user and redistribute resource, user obtain data according to resource request process, improved real-time and the accuracy of data acquisition, and can also effectively avoid different user to obtain identical data and cause the problem of resource contention.
Use the method for this embodiment, not only can realize the processing of the single Packet Identifier TS flow data of user, can also realize that the user obtains the purpose of a plurality of Packet Identifier TS flow datas simultaneously.Specifically, if include the TS flow data that obtains a plurality of Packet Identifier in the user data requests, at first from buffer memory, extract corresponding TS stream packets according to each Packet Identifier, then a plurality of TS stream packets are complex as a packet as the required demultiplexed data of user, again this demultiplexed data are sent to the user of request msg in the mode of call back function.
Step 211: after the user has obtained desired data, discharge used filter, close used chnnels of resources.
Like this, the filter after the release and the chnnels of resources of closing can use for other users, prevent resources idle, have improved resource utilization.
Step 212: flow process finishes.
Using the method for this embodiment distributes unitedly and manages data, user's request and resource, can not only handle the reasonable distribution of the resources such as inner each chnnels of resources, filter well uses, and can handle the simultaneously collision problem of request msg of multi-user well, guarantee that request of data is with in time obtaining valid data per family, and be difficult for when the multi-user obtains identical data simultaneously blocking, improved the real-time of data acquisition.And by the different types of data classification is stored, same user can obtain dissimilar data simultaneously, can also obtain simultaneously the TS flow data of a plurality of PID.In addition, with registered callbacks function mode request msg, with call back function mode return data, can guarantee that the user obtains data in time, rapidly, further guarantee the real-time of data, and can obliterated data, the integrality of data guaranteed.
Above embodiment is only in order to illustrating technical scheme of the present invention, but not limits it; Although with reference to previous embodiment the present invention is had been described in detail, for the person of ordinary skill of the art, still can make amendment to the technical scheme that previous embodiment is put down in writing, perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of the present invention's technical scheme required for protection.
Claims (10)
1. a method of obtaining demultiplexed data is characterized in that, described method comprises the steps:
A1, receive user data requests, according to the data type in the user data requests and filtercondition with the demultiplexed data buffer memory of classifying;
A2, be the corresponding chnnels of resources of user assignment and filter according to user data requests;
A3, user are according to chnnels of resources and the required demultiplexed data of filter acquisition request from buffer memory;
A4, from buffer memory, obtain required demultiplexed data and be sent to the user of request msg.
2. method according to claim 1, it is characterized in that, if include the TS flow data that obtains a plurality of Packet Identifier in the described user data requests, in described step a4, at first from buffer memory, extract corresponding TS stream packets according to each Packet Identifier, then a plurality of TS stream packets are complex as a packet as the required demultiplexed data of user, again this demultiplexed data are sent to the user of request msg.
3. method according to claim 1 and 2 is characterized in that, also comprises the steps: after described step a4
A5, user have obtained after the required data, discharge used filter, close used chnnels of resources.
4. method according to claim 3 is characterized in that, also comprises the steps: before described step a1
A0, the maximum number of user amount of obtaining simultaneously the same type data is set;
In described step a2, the maximum number of user amount that arranges according to user data requests and step a0 determines whether be the corresponding chnnels of resources of user assignment and filter.
5. method according to claim 4 is characterized in that, in described step a1, when the user data requests that receives, judges whether first to exist identical request of data, if exist, directly carries out described step a4; If do not exist, carry out again described step a2, a3 and a4.
6. each described method in 5 according to claim 1 is characterized in that in described step a2, user data requests is sent in registered callbacks function mode; In described step a4, the demultiplexed data of obtaining from buffer memory is sent to the user of request msg in the call back function mode.
7. a device that obtains demultiplexed data is characterized in that, described device comprises:
Demultiplexing equipment is used for receiving the compound TS stream that the broadcasting and TV front end transmits, and compound TS stream is carried out demultiplexing, obtains demultiplexed data;
The demultiplexing rm-cell is connected with the user who needs demultiplexed data, is user resource allocation passage and filter for the reception user data requests, according to request of data;
The demultiplexed data taxon is conciliate the multiplexed resource administrative unit with demultiplexing equipment and is connected, and is used for according to the data type in the user data requests and filtercondition demultiplexed data being classified;
The demultiplexed data buffer unit is connected with the demultiplexed data taxon, is used for storing sorted demultiplexed data;
Demultiplexed data is obtained and transmitting element, be connected with the demultiplexed data buffer unit with the demultiplexing rm-cell, be used for from the demultiplexed data buffer unit, obtaining the required demultiplexed data of user and being sent to the user of request msg according to chnnels of resources and filter.
8. device according to claim 7 is characterized in that, described demultiplexing rm-cell also is used for the judgement user and whether obtains required data, and after the user has obtained required data, closes used chnnels of resources, reclaims used filter.
9. device according to claim 8, it is characterized in that, described demultiplexing rm-cell is when receiving user data requests, judge whether first to exist identical request of data, if exist, directly the described demultiplexed data of control is obtained with transmitting element and is sent the required demultiplexed data of user to the user of request msg, if do not exist, is user resource allocation passage and filter again.
10. each described device in 9 according to claim 7 is characterized in that described device also comprises:
Parameter set unit is connected with described demultiplexing rm-cell, is used for arranging the maximum number of user amount of obtaining simultaneously the same type data; The demultiplexing rm-cell determines whether be user resource allocation passage and filter according to the parameters of user data requests and parameter set unit when receiving user data requests.
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