CN103002339B - Obtain the method and apparatus of demultiplexed data - Google Patents
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Abstract
The invention discloses a kind of method and apparatus obtaining demultiplexed data, described method comprises the steps: to receive user data requests, demultiplexed data to be classified buffer memory according to the data type in user data requests and filter condition; According to user data requests for user distributes corresponding chnnels of resources and filter; User is the demultiplexed data from buffer memory needed for acquisition request according to chnnels of resources and filter; From buffer memory, obtain required demultiplexed data and be sent to the user of request msg.The present invention is by classifying demultiplexed data in advance, storing, carry out unified management, then according to user data requests dynamic allocation of resources and transmission data, avoid resource contention, ensure multiple user simultaneously request msg be there is not the user got clogged, for user provides desired data in real time, quickly.
Description
Technical field
The invention belongs to digital television techniques field, specifically, relate to the data processing technique in digital television techniques field, more particularly, relate to the method for acquisition demultiplexed data, device and digital television receiver.
Background technology
At present, the application of the digital television receiver such as Set Top Box, all-in-one is more and more extensive, the audio/video flow data of broadcasting and TV front end delivery can not only be play, can also realize tuning, display electronic program guide (EPG), roll titles etc., and the realization of all these application all be unable to do without the acquisition of demultiplexed data.
For meeting the demand data of the multiple application of digital television receiver, demultiplexed data type is more, and different application often can need the data simultaneously obtaining a type.Because current demultiplexed data lacks unified management, each leisure of multiple application needs directly to read from demultiplexed data during data, can block other reading of application to these data, the processing speed of impact application in this application reading process.Therefore, often there will be multiple application compete same data and cause resource contention, all can not obtain the problem of data fast.If application can not be carried out fast, normally, watch experience by what affect digital television receiver user, and then affect the popularization of digital television receiver.
Summary of the invention
The present invention is directed to demultiplexed data for want of unified management in prior art and easily cause the problems referred to above such as resource contention and data jamming, provide a kind of method and apparatus obtaining demultiplexed data, by carrying out unified management to data, improve speed and accuracy that multi-user obtains data simultaneously.
For achieving the above object, method provided by the invention adopts following technical proposals to be achieved:
Obtain a method for demultiplexed data, described method comprises the steps:
A1, receive user data requests, demultiplexed data to be classified buffer memory according to the data type in user data requests and filter condition;
A2, according to user data requests for user distributes corresponding chnnels of resources and filter;
A3, user be the demultiplexed data from buffer memory needed for acquisition request according to chnnels of resources and filter;
A4, from buffer memory, obtain required demultiplexed data and be sent to the user of request msg.
Method as above, if include the TS flow data obtaining multiple Packet Identifier in described user data requests, in described step a4, first from buffer memory, corresponding TS stream packets is extracted according to each Packet Identifier, then multiple TS stream packets is complex as a packet as the demultiplexed data needed for user, again this demultiplexed data is sent to the user of request msg, thus realizes the object that user obtains the TS flow data of multiple Packet Identifier simultaneously.
Method as above, for improving resource utilization, also comprises the steps: after described step a4
A5, user discharge filter used, close chnnels of resources used after having obtained required data.
Method as above, for improving the effective management to user data requests further, also comprised the steps: before described step a1
A0, the maximum number of user amount simultaneously obtaining same type data is set;
In described step a2, determine whether be that user distributes corresponding chnnels of resources and filter according to the maximum number of user amount that user data requests and step a0 are arranged.
Method as above, obtains the speed of demultiplexed data for improving user further, in described step a1, when the user data requests received, first judge whether to there is identical request of data, if exist, directly perform described step a4; If do not exist, then perform described step a2, a3 and a4.
Method as above, for improving real-time and the accuracy of data acquisition further, in described step a2, user data requests sends with registered callbacks function fashion; In described step a4, the demultiplexed data obtained from buffer memory is sent to the user of request msg in call back function mode.
For realizing aforementioned invention object, device provided by the invention adopts following technical proposals to realize:
Obtain a device for demultiplexed data, described device comprises:
Demultiplexing device, the compound TS being used for receiving broadcasting and TV front end delivery flows, and carries out demultiplexing to compound TS stream, obtains demultiplexed data;
Demultiplexing rm-cell, is connected with needing the user of demultiplexed data, is user resource allocation passage and filter for receiving user data requests, according to request of data;
Demultiplexed data taxon, conciliates multiplexed resource administrative unit with Demultiplexing device and is connected, and is used for demultiplexed data being classified according to the data type in user data requests and filter condition;
Demultiplexed data buffer unit, is connected with demultiplexed data taxon, is used for storing sorted demultiplexed data;
Demultiplexed data obtains and transmitting element, be connected with demultiplexed data buffer unit with demultiplexing rm-cell, be used for from demultiplexed data buffer unit, obtaining the demultiplexed data needed for user according to chnnels of resources and filter and being sent to the user of request msg.
Device as above, for improving resource utilization, described demultiplexing rm-cell also for judging whether user obtains required data, and after user has obtained required data, is closed chnnels of resources used, is reclaimed filter used.
Device as above, the speed of demultiplexed data is obtained for improving user further, described demultiplexing rm-cell is when receiving user data requests, first judge whether to there is identical request of data, if exist, the described demultiplexed data of direct control obtains and transmitting element sends the user of the demultiplexed data needed for user to request msg, if do not exist, then is user resource allocation passage and filter.
Device as above, for improving the effective management to user data requests further, described device also comprises:
Parameter set unit, is connected with described demultiplexing rm-cell, is used for arranging the maximum number of user amount simultaneously obtaining same type data; Demultiplexing rm-cell is when receiving user data requests, and the parameters according to user data requests and parameter set unit determines whether be user resource allocation passage and filter.
Compared with prior art, advantage of the present invention and good effect are: demultiplexed data is classified by the present invention in advance, storage, carry out unified management, then according to user data requests dynamic allocation of resources and transmission data, avoid resource contention, ensure multiple user simultaneously request msg be there is not the user got clogged, for user provides desired data in real time, quickly.
After reading the specific embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the structured flowchart that the present invention obtains a device embodiment of demultiplexed data;
Fig. 2 is the flow chart that the present invention obtains a method embodiment 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 a device embodiment of demultiplexed data.The acquisition of the demultiplexed data described in the device of this embodiment, refer to that various different application user obtains by the data after Demultiplexing device demultiplexing, this device is exactly be different application user service, is convenient to multiple user and gets demultiplexed data needed for application in time, quickly and accurately.
As shown in Figure 1, to obtain the cellular construction included by device of demultiplexed data, annexation each other and function as follows for this embodiment:
Demultiplexing device 11, the compound TS being used for receiving broadcasting and TV front end delivery flows, and carries out demultiplexing to compound TS stream, to obtain demultiplexed data.
Demultiplexing rm-cell 15, this unit is as the core of device, be connected with needing the user 17 of demultiplexed data, for receiving user data requests, and be user resource allocation passage and filter according to request of data, so that unified management related resources, realize the unified management to demultiplexed data and distribution.When the application of installation of this embodiment is in the digital television receivers such as Set Top Box, user 17 includes multiple application needing demultiplexed data, as the audio/video flow etc. come is pushed in tuning, roll titles, broadcasting front end, each user is connected with demultiplexing rm-cell 15 respectively.
Demultiplexed data taxon 12, conciliates multiplexed resource administrative unit 15 with Demultiplexing device 11 and is connected, and is used for demultiplexed data being classified according to the data type in user data requests and filter condition.For digital television receivers such as Set Top Box, data after demultiplexing have generally comprised PSI(Program Specific Information)/SI(business information) etc. the PES(Program Elementary Stream such as TS flow data and captions such as section data, audio frequency and video) flow data, these data can according to user arrange Packet Identifier and filter condition carry out Type division.
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 is also for judging whether user obtains required data, and after user has obtained required data, close chnnels of resources used, reclaim filter used, so that give other users by limited Resourse Distribute.
In addition, obtain the speed of demultiplexed data for improving user further, demultiplexing rm-cell 15, when receiving user data requests, first judges whether to there is identical request of data.If exist, chnnels of resources, filter and the demultiplexed data corresponding due to identical request of data are identical, in the case, do not need to redistribute resource, can directly control demultiplexed data obtain and transmitting element 16 send ask with identical request of data data, be also the user of the demultiplexed data needed for user to request msg.If there is not identical request of data, then be user resource allocation passage and filter.
Demultiplexed data obtains and transmitting element 16, be connected with demultiplexed data buffer unit 13 with demultiplexing rm-cell 15, be used for the chnnels of resources that distributes for user 17 according to demultiplexing rm-cell 15 and filter obtains demultiplexed data needed for user from demultiplexed data buffer unit 13, and sends data to the user 17 of request msg.
If include the TS flow data obtaining multiple Packet Identifier in the user data requests received, demultiplexed data obtains and transmitting element 16 extracts corresponding TS stream packets by according to each Packet Identifier from demultiplexed data buffer unit 13, then multiple TS stream packets is complex as a packet as the demultiplexed data needed for user, then this demultiplexed data is 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 be connected with demultiplexing rm-cell 15, is used for arranging the maximum number of user amount simultaneously obtaining same type data.Demultiplexing rm-cell 15, when receiving user data requests, determines whether be user resource allocation passage and filter by according to the parameters of user data requests and parameter set unit.In addition, by parameter set unit 14, the maximum number once obtaining TS stream packets can also be set, so that conservative control and distribution T S stream packets.
Utilizing the device of said structure to obtain the concrete grammar of demultiplexed data can with reference to the 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 a method embodiment of demultiplexed data, the acquisition of the said demultiplexed data of this embodiment, also be that each user obtains a kind of data acquisition by the data after Demultiplexing device demultiplexing using various different application such as the playing audio-video stream in digital television receiver, display electronic program guides, roll titles, picture and text as user.This embodiment based on the device of Fig. 1, in the mode of dynamic management and distribution for multiple user provides demultiplexed data.
As shown in Figure 2, the process of this embodiment acquisition demultiplexed data is as follows:
Step 201: flow process starts.
Step 202: start Demultiplexing device, to carry out demultiplexing to the compound TS stream of broadcasting and TV front end delivery, obtains demultiplexed data.
Step 203: the maximum number of user amount simultaneously obtaining same type data and the number once obtaining TS stream packets are set.
Here TS stream packets, mainly refers to that the private data bag of audio/video flow packet and the definition pushed is flowed by compound TS in broadcasting and TV front end.This step, as this embodiment optional Optimization Steps, by arranging the maximum number of user amount obtaining same type data simultaneously, can manage multiple user data requests, the data of reasonable distribution different user request better.By arranging the number once obtaining TS stream packets, on the one hand can when request of data user does not require speed packet transmission conservative control and distribute data, data transmission bauds reference can be provided on the other hand, with the speed facilitating user's Reasonable adjustment to obtain demultiplexed data for user.
Step 204: receive user data requests, to classify demultiplexed data buffer memory according to the data type in user data requests and filter condition.
For digital television receivers such as Set Top Box, data after demultiplexing have generally comprised the PES flow datas such as TS flow data and captions such as section data, audio frequency and video such as PSI/SI, and these data can be classified according to the difference of its Packet Identifier (PID) and filter condition.
For the user needing TS flow data and PES flow data, user can send Packet Identifier, and namely this Packet Identifier reflects the data required for user.And for needing the user's request obtaining section data, after sending Packet Identifier, also need to send filter condition.And in this embodiment, user data requests preferably adopts the mode of registered callbacks function to send.
Step 205: after receiving user data requests, judges whether the user of request of data of the same type is greater than maximum number of user amount.If so, step 206 is performed; Otherwise, go to step 207.
As mentioned above, the data of the different user whether identical type of acquisition request can be judged by the Packet Identifier in user data requests and filter condition.
Step 206: when the user of request of data of the same type is greater than default maximum number of user amount, for avoiding that resource contention occurs, affect data transfer rate, the response of current-user data request will be suspended, wait for that other user's end data obtaining data of the same type obtain, until the user of request of data of the same type is not more than 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, illustrates that user data requests is within controlled scope, then respond this request of data.And, first, judge whether to there is identical data request.If exist, go to step 210; Otherwise, perform step 208.
Step 208: if there is no identical data request is then user resource allocation passage and filter according to request of data.
Specifically, be according to the Packet Identifier in user data requests for user distributes corresponding chnnels of resources, according to the filter condition in user data requests for user distributes corresponding filter.Certainly, if request of data is for obtaining TS flow data or PES flow data, not comprising filter condition in request of data, therefore, also can not be its dispense filter device.
Step 209: the chnnels of resources distributed and filter information feed back to user, user is by the demultiplexed data of the acquisition request respective type from buffer memory according to corresponding chnnels of resources and filter.
Step 210: obtain required demultiplexed data from buffer memory, is sent to the user of request msg.
Preferably, for the user sending request of data in the mode of registered callbacks function, demultiplexed data will be sent to this user in call back function mode.
When step 207 judges to have identical data request, no longer perform step 208 and 209, but directly perform this step 210.The object done like this is: the channel resource needed due to identical request of data and filter are identical, required demultiplexed data is also identical, therefore, when there is identical data request, the demultiplexed data be sent to first identical data request user directly can be sent to current data request user, save for user redistributes resource, user according to the process of resource request acquisition data, improve real-time and the accuracy of data acquisition, and different user effectively can also be avoided to obtain identical data and cause the problem of resource contention.
Apply the method for this embodiment, not only can realize the process of the single Packet Identifier TS flow data of user, the object that user obtains multiple Packet Identifier TS flow data simultaneously can also be realized.Specifically, if include the TS flow data obtaining multiple Packet Identifier in user data requests, first from buffer memory, corresponding TS stream packets is extracted according to each Packet Identifier, then multiple TS stream packets is complex as a packet as the demultiplexed data needed for user, then this demultiplexed data is sent to the user of request msg in the mode of call back function.
Step 211: after user has obtained desired data, discharges filter used, closes used resource passage.
Like this, the filter after release and the chnnels of resources of closedown can be used for other users to use, and prevent resources idle, improve resource utilization.
Step 212: flow process terminates.
The method applying this embodiment is distributed unitedly data, user's request and resource and is managed, the reasonable distribution can not only handling the resources such as inner each chnnels of resources, filter well uses, and the collision problem of multi-user's simultaneously request msg can be handled well, ensure that request of data is with obtaining valid data in time per family, and multi-user not easily blocks when obtaining identical data, improves the real-time of data acquisition simultaneously.And by different types of data classification being stored, same user can obtain dissimilar data, can also obtain the TS flow data of multiple PID simultaneously simultaneously.In addition, with registered callbacks function fashion request msg, with call back function mode return data, can ensure that user obtains data in time, rapidly, further ensure the real-time of data, and can not obliterated data, ensure that the integrality of data.
Above embodiment only in order to technical scheme of the present invention to be described, but not is limited; Although with reference to previous embodiment to invention has been detailed description, for the person of ordinary skill of the art, still can modify to the technical scheme described in previous embodiment, or equivalent replacement is carried out to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of the present invention's technical scheme required for protection.
Claims (9)
1. obtain a method for demultiplexed data, it is characterized in that, described method comprises the steps:
A1, receive user data requests, demultiplexed data to be classified buffer memory according to the data type in user data requests and filter condition; The TS flow data obtaining multiple Packet Identifier is included in described user data requests;
A2, according to user data requests for user distributes corresponding chnnels of resources and filter;
A3, user be the demultiplexed data from buffer memory needed for acquisition request according to chnnels of resources and filter;
A4, from buffer memory, extract corresponding TS stream packets according to each Packet Identifier, then multiple TS stream packets is complex as a packet as the demultiplexed data needed for user, then this demultiplexed data is sent to the user of request msg.
2. method according to claim 1, is characterized in that, also comprises the steps: after described step a4
A5, user discharge filter used, close chnnels of resources used after having obtained required data.
3. method according to claim 2, is characterized in that, also comprises the steps: before described step a1
A0, the maximum number of user amount simultaneously obtaining same type data is set;
In described step a2, determine whether be that user distributes corresponding chnnels of resources and filter according to the maximum number of user amount that user data requests and step a0 are arranged.
4. method according to claim 3, is characterized in that, in described step a1, when the user data requests received, first judges whether to there is identical request of data, if exist, directly performs described step a4; If do not exist, then perform described step a2, a3 and a4.
5. method according to any one of claim 1 to 4, is characterized in that, in described step a2, user data requests sends with registered callbacks function fashion; In described step a4, the demultiplexed data obtained from buffer memory is sent to the user of request msg in call back function mode.
6. obtain a device for demultiplexed data, it is characterized in that, described device comprises:
Demultiplexing device, the compound TS being used for receiving broadcasting and TV front end delivery flows, and carries out demultiplexing to compound TS stream, obtains demultiplexed data;
Demultiplexing rm-cell, is connected with needing the user of demultiplexed data, is user resource allocation passage and filter for receiving user data requests, according to request of data;
Demultiplexed data taxon, conciliates multiplexed resource administrative unit with Demultiplexing device and is connected, and is used for demultiplexed data being classified according to the data type in user data requests and filter condition;
Demultiplexed data buffer unit, is connected with demultiplexed data taxon, is used for storing sorted demultiplexed data;
Demultiplexed data obtains and transmitting element, be connected with demultiplexed data buffer unit with demultiplexing rm-cell, be used for from demultiplexed data buffer unit, obtaining the demultiplexed data needed for user according to chnnels of resources and filter and being sent to the user of request msg;
Wherein, the TS flow data obtaining multiple Packet Identifier is included in described user data requests, described demultiplexed data obtains and transmitting element extracts corresponding TS stream packets according to each Packet Identifier from described data buffer storage unit, then multiple TS stream packets is complex as a packet as the demultiplexed data needed for user, then this demultiplexed data is sent to the user of request msg.
7. device according to claim 6, is characterized in that, described demultiplexing rm-cell also for judging whether user obtains required data, and after user has obtained required data, is closed chnnels of resources used, reclaimed filter used.
8. device according to claim 7, it is characterized in that, described demultiplexing rm-cell is when receiving user data requests, first judge whether to there is identical request of data, if exist, the described demultiplexed data of direct control obtains and transmitting element sends the user of the demultiplexed data needed for user to request msg, if do not exist, then is user resource allocation passage and filter.
9. the device according to any one of claim 6 to 8, 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 simultaneously obtaining same type data; Demultiplexing rm-cell is when receiving user data requests, and the parameters according to user data requests and parameter set unit determines whether be user resource allocation passage and filter.
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| CN103533409A (en) * | 2013-10-24 | 2014-01-22 | 深圳国微技术有限公司 | Method and device for playing stream media file |
| CN105472445B (en) * | 2015-11-19 | 2018-09-11 | 四川长虹电器股份有限公司 | TS flows Deplexing method |
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| CN102075804A (en) * | 2010-12-29 | 2011-05-25 | 青岛海信宽带多媒体技术有限公司 | Method and device for acquiring SI data |
| CN102710981A (en) * | 2012-05-08 | 2012-10-03 | 深圳市九洲电器有限公司 | Set top box-based method and device for receiving and processing data |
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| CN101720036A (en) * | 2009-12-15 | 2010-06-02 | 青岛海信宽带多媒体技术有限公司 | System for distributing DVB data to multiple users |
| CN102075804A (en) * | 2010-12-29 | 2011-05-25 | 青岛海信宽带多媒体技术有限公司 | Method and device for acquiring SI data |
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