CN104065994A - Data access control method and data access control device - Google Patents
Data access control method and data access control device Download PDFInfo
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- CN104065994A CN104065994A CN201310090733.4A CN201310090733A CN104065994A CN 104065994 A CN104065994 A CN 104065994A CN 201310090733 A CN201310090733 A CN 201310090733A CN 104065994 A CN104065994 A CN 104065994A
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- access control
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Abstract
The invention proposes a data access control method which includes the following steps: (a) receiving a plurality of data units: (b) filtering at least one of the data units: (c) storing unfiltered data units: (d) according to times when the plurality of data units are received in step (a), restoring time sequences of the stored data units in step (c); (e) using at least one substitutive data unit to substitute the filtered data units, wherein each substitutive data unit has a time sequence of a corresponding substituted data unit which is filtered; and (f) according to time sequences of the plurality of unfiltered units and the time sequences of the substitutive data units, outputting the unfiltered data units and the substitutive data units.
Description
Technical field
The present invention, relevant for data access control method and data access control device, is particularly to insert blank package to increase data access control method and the data access control device of playing fluency.
Background technology
PCMCIA (personal memory card international association PC memory card international association device) card can be as the use of the decoding of image.For instance, user is after dealer's defrayment of digital television pay channels, and dealer can provide the pcmcia card with decoding chip to user, or user originally just has pcmcia card, and dealer can provide the program of decoding or sequence number to user.Then the viewdata that user can decode and be encoded by dealer with this pcmcia card.
The flow process of decoding with pcmcia card can be divided into two kinds conventionally: a kind of is that decoded viewdata is stored; and encrypt with another cipher mode; in the time will playing the viewdata that stores and encrypted; again the viewdata that stores and encrypted is deciphered and play; but this kind of mode is normally stored in the viewdata of encrypting the storage device outside PCMICI card; therefore the viewdata of encrypting is likely stolen and is tested and crack, and information protection is poor.Another kind of be that the viewdata of not decoding is stored, to broadcast after delivering to again pcmcia card decoding when wish is play, this kind of mode is because still need pcmcia card or related data that dealer provides to decode, so information protection is better.
Fig. 1 has illustrated the calcspar of the digital television apparatus 100 of the use PCMCIA in known technology.Digital television apparatus 100 has been used the aforementioned viewdata by not decoding to store, and delivers to the mechanism of broadcasting after pcmcia card decoding when wish is play again.As shown in Figure 1, digital television apparatus 100 has comprised antenna 101, tuner (tuner) 103, demodulator (demodulator) 105, document storage 107 and pcmcia card 109.Antenna 101 is in order to receive viewdata signal, wherein to have comprised the viewdata signal of being encoded by dealer.Tuner 103 is in order to be adjusted to frequency correct channel.Demodulator 105 is to receive viewdata signal from tuner 103, and input signal is carried out to demodulation, carries out channel correction, channel synchronization, debug forward, the actions such as channel coding.Due to known to those skilled in the art the knowing of effect of tuner in digital television apparatus 103 and demodulator 105, therefore repeat no more in this.And for example, can be sent to data access control device 107 by the original tv data SD (mpeg transport stream) that tuner 103 and demodulator 105 were processed, then as previously mentioned, data access control device 107 can first store original tv data SD, then when receiving output order, exports the original tv data SD ' previously having stored and decodes to produce the rear viewdata CD of decoding to pcmcia card 109.After decoding, viewdata CD can directly be sent to display and plays, or again after other image processing (as image sequential is proofreaied and correct or image contrast strengthening etc.) play again.
Between its package of viewdata, have the mechanism that time point is aimed at originally, yet such mechanism just can be destroyed after package is stored into storage device.Yet under such framework, because original tv data SD delivers to pcmcia card 109 decode and broadcast after storing again, the sequential relationship of its package is destroyed.Therefore user is when viewing and admiring the original tv data SD ' of previous storage, and the fluency that it is experienced or image quality may be poorer than instant viewdata.
Summary of the invention
The present invention's one object is for providing a kind of data access control method and data access control device, the sequential of the viewdata that it can recover to be stored also fills into blank package according to this sequential, while making the viewdata that stores played, still there is fluency and the quality of instant TV programme.
One embodiment of the invention has proposed a kind of data access control method, comprises: (a) receive a plurality of information units; (b) filter at least one of described information unit; (c) store the described information unit not being filtered; (d) according to the received time of a plurality of information units described in should (a) step, recover the sequential of the described information unit that is stored in this (c) step; (e) with at least one alternative information unit, fill into the described information unit being filtered, wherein each this alternative information unit has this sequential of its this information unit being filtered filling into; And the described information unit and the described alternative information unit that (f) according to the described sequential output of the described sequential of the described a plurality of unit that are not filtered and described alternative information unit, are not filtered.
Another embodiment of the present invention has proposed a kind of data access control device, comprises: a filter, in order to receive and to filter at least one of a plurality of information units; One sequential tape deck, in order to produce the sequential of the described information unit of this filter output according to the received time of this information unit; One storage device, in order to store the described information unit not filtered by this filter; One time sequence recovery device, this timing recovery recording according to this sequential tape deck is by the sequential of the described information unit of this storage device stores; One substituting unit data insertion apparatus, fills into the described information unit being filtered with at least one alternative information unit, wherein each this alternative information unit has this sequential of its this information unit being filtered filling into; And an o controller, the described information unit and the described alternative information unit that according to the described sequential output of the described sequential of the described a plurality of unit that are not filtered and described alternative information unit, are not filtered.
By aforesaid embodiment, can viewdata can original sequential be output by the mode that fills into blank package, so can make user when viewing and admiring the viewdata storing, still there is fluency and the quality of the viewdata of viewing and admiring instant.And by the output speed of adjusting viewdata, can allow user experience better fluency and quality.
Accompanying drawing explanation
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 has illustrated the calcspar of the digital television apparatus of the use PCMCIA in known technology.
Fig. 2 has illustrated according to the calcspar of the data access control device of the embodiment of the present invention.
Fig. 3 has illustrated the action schematic diagram of the data access control device shown in Fig. 2.
Fig. 4 has also illustrated the action schematic diagram of the data access control device shown in Fig. 2.
Fig. 5 and Fig. 6 have illustrated the action schematic diagram of the data access control device of different embodiment according to the subject invention.
Fig. 7 has illustrated the flow chart of data access control method according to an embodiment of the invention.
Component symbol explanation:
100 digital television apparatus
101 antennas
103 tuners
105 demodulators
107 document storages
109PCMCIA card
200 digital television apparatus
201 data access control device
202 processing units
207 filters
209 sequential tape decks
211 storage devices
213 time sequence recovery devices
215 packet buffers
217 blank package insertion apparatus
219 o controllers
Embodiment
Fig. 2 has illustrated according to the calcspar of the data access control device 201 of the embodiment of the present invention.In this embodiment, still with digital television apparatus 200, explain, that is data access control device 201 receives original tv data SD from demodulator 203
in, and output is stored viewdata SD
ogive pcmcia card 205, but not in order to limit the present invention, concept of the present invention is when using in any other data.And whether decision starts original tv data SD
instorage is got off, and can be triggered by a user (for example give data access control device 201 1 make video recording instruction), or data access control device 201 can store original tv data SD automatically
in, with the use as buffering or backup.Fig. 3 has illustrated the action schematic diagram of the data access control device shown in Fig. 2, is please joining alternately Fig. 2 and Fig. 3 more to understand content of the present invention.
As shown in Figure 2, data access control device 201 has comprised a processing unit 202, filter 207, one sequential tape decks 209, a storage device 211, a time sequence recovery device 213, the blank package insertion apparatus 217 of a packet buffer 215, one and an o controller 219.In this embodiment, processing unit 202 is in order to control the action (part wiring does not illustrate) of all elements, but each element also can be controlled by different control circuits in other embodiment.The original tv data SD that filter 207 receives from demodulator 203
in, this original tv data SD
incomprise a plurality of packages, package P as shown in Figure 3
1-P
9.Filter 207 can filter original tv data SD
inpackage at least one and viewdata FSD after output filtering.In an embodiment, filter 207 is a pid filter, its can according to the parameter that sets filter not need viewdata.For instance, original tv data SD
inin package P
1, P
4, P
6and P
7the viewdata that belongs to A channel, and package P
2, P
3, P
5, P
8and P
9the viewdata that belongs to B channel, the television channel that wherein B channel just can be seen for paying, namely wish is used the channel of pcmcia card 205 decodings.In this example, user wants to watch the program of pay channel, therefore can be configured to only allow the viewdata of B channel to pass through by filter 207, so filters only remaining package P of rear viewdata FSD
2, P
3, P
5, P
8and P
9.
As previously mentioned, between its package of viewdata, have the mechanism that time point is aimed at originally, yet such mechanism just can be destroyed after package is stored into storage device.With reference to Fig. 3, the package P in original tv data SD
1-P
9the corresponding sequential 1-9 of difference.But viewdata FSD is stored into after storage device 211 after filtering, these sequential relationships can be destroyed.Therefore can need a kind of mechanism again to recover the sequential of the package after storage.In one embodiment, be to utilize a sequential tape deck 209 and a time sequence recovery device 213 that this mechanism is provided.Sequential tape deck 209 is in order to record the sequential of viewdata FSD after the filtration of filter 207 output, then time sequence recovery device 213 can filter rear viewdata FSD according to the timing recovery of recording, viewdata TFSD after the timing recovery that makes its formation have sequential data filters.In one embodiment, the time that sequential tape deck 209 can receive according to the demodulated device of package provide a temporary sequential to viewdata FSD after filtering, to form viewdata FSD ' after temporary filtration.As shown in Figure 3, after temporary filtration, viewdata FSD ' has temporary sequential 2 ', 3 ', 5 ', 8 ' and 9 '.Then time sequence recovery device 213 can reduce real sequential to produce the rear viewdata TFSD of timing recovery filtration according to viewdata FSD ' after temporary filtration.Sequential tape deck 209 and time sequence recovery device 213 can be comprised of multiple circuit structure.For instance, the Taiwan patent application case that publication number is TW201105137 has disclosed this type of circuit structure and detailed manner of execution thereof.Detailed speech, in this Taiwan patent application case, the recording device 2A of Fig. 2 has the function of sequential tape deck 209 of the present invention, and its replay device 2B has the function of time sequence recovery device 213 of the present invention, but not in order to limit the present invention.Any circuit or the device that can reach the function of sequential tape deck 209 of the present invention and time sequence recovery device 213, all should be within the scope of the present invention.
Blank package insertion apparatus 217 fills into the package being filtered and fills into rear viewdata NFSD to produce blank package with at least one blank package, wherein each blank package has the sequential of its package being filtered filling into.For instance, after the blank package of Fig. 3 fills in viewdata NFSD, blank package P
n1, P
n2, P
n4, P
n6, P
n7and P
n10just filled into the package P being filtered
1, P
4, P
6, P
7and P
10, therefore can there is respectively sequential 1,4,6,7 and 10.In an embodiment, packet buffer 215 comprises a plurality of buffer cells, in order to temporary package.If processing unit 202 detects buffer cell and do not receive the package that should receive, control blank package insertion apparatus 217 and fill into blank package.O controller 219 fills into according to blank package package and the blank package that the sequential output of rear viewdata NFSD is not filtered, and as Fig. 3, is stored viewdata SD
o.In an embodiment, output is stored viewdata SD
otime, between the delivery time point of each package, all can there is a time interval T.The reason that can form this time interval T is quite a lot of, is likely the time of delay that each element causes, or meets data transmission specification and needed time T.
Fig. 4 has also illustrated the action schematic diagram of the data access control device shown in Fig. 2.Different from Fig. 3 is, Fig. 4 has illustrated the package of each signal and viewdata and the relation between blank package in more detail, wherein synchronizing signal SYNC represents will have package to transmit, that is can exist a complete package between two synchronizing signal high potentials.Whether useful signal Valid represents to have packet information to transmit, and in one embodiment, its high potential interval scale has packet information to transmit, and electronegative potential interval scale does not transmit the time interval T of data.In Fig. 4, when synchronizing signal SYNC becomes high potential (Hsync for the first time
1) and useful signal Valid while being high potential, start to export package P
1data.And useful signal Valid does not just export package P while becoming electronegative potential
1data (may be transmitted complete or forced termination).Same, when synchronizing signal SYNC becomes high potential (Hsync for the second time
2) and useful signal Valid while being high potential, start to transmit the data of blank package NP.And useful signal Valid does not just transmit the data (may be transmitted complete or forced termination) of blank package NP while becoming electronegative potential.
Fig. 5 and Fig. 6 have illustrated the action schematic diagram of the data access control device of different embodiment according to the subject invention.In the embodiment of Fig. 5, processing unit 202 is controlled o controllers 219, and making the summation of package that o controller 219 exports in a predetermined period (being between two high levels of synchronizing signal Sync) and blank package one data quantity is wherein a predetermined value.For instance, the package P exporting in a predetermined period in Fig. 5
1data summation be 188 bit groups, this package P
1can be aforesaid viewdata package or blank package.In the embodiment of Fig. 6, processing unit 202 is by package P
1be divided into a plurality of package part P
11, P
12and P
13, this package P
1can be aforesaid viewdata package or blank package.And output package part P
11, P
12and P
13time, package part P
11, P
12and P
13between have not output time spacing t
1, t
2.And processing unit 202 makes the package part of o controller 219 (being between two high levels of synchronizing signal Sync) output in a predetermined period and the summation of data quantity corresponding to output time spacing not, is a predetermined value.For instance, in the embodiment of Fig. 6, package part P in predetermined period
11, P
12and P
13data quantity, and output time spacing t not
1, t
2the summation of corresponding data quantity is 188 bit groups.
In an embodiment, the predetermined value in the content of Fig. 5 and Fig. 6 is the data quantity that filter 207 receives in a predetermined period.Therefore, in the case, processing unit 202 is controlled the data quantity that o controller 219 is exported in a predetermined period, and the data quantity receiving in predetermined period with filter 207 equates.If reach the output step of Fig. 5 and Fig. 6, there is various ways perhaps, wherein a kind of for an output signal CLK is provided
tgive the use of o controller 219 as output, this output signal CLK
thave must frequency.In an embodiment, be to receive an outside clock signal CLK
o, processing unit 202 can be with this outside clock signal CLK
odivided by difference, produce clock signal after coarse adjustment frequency elimination except frequency ratio respectively, and judge after that coarse adjustment frequency elimination clock signal approach institute must frequency and with clock signal after this best coarse adjustment frequency elimination as output signal CLK
t, this step is called coarse adjustment.And then adjust the time interval (as the T in Fig. 4) between package and package, this step is called fine setting.So please be careful, be not limited to use this mode to reach the output step of Fig. 5 and Fig. 6.
Though aforesaid content all illustrates with package, data not necessarily transmits with the form of package.Therefore, package can be replaced by the information unit of other types.In in the case, package can be considered information unit, blank package can be considered for substituting information unit, and the packet buffer 215 in Fig. 2 is an information unit buffer, and blank package insertion apparatus can be considered a substituting unit data insertion apparatus.
According to aforesaid embodiment, can obtain the data access control method shown in Fig. 7, it comprises the following step:
Step 701
Receive a plurality of information units.The original tv data SD in Fig. 3 for example
in.
Step 703
Filter at least one in these information units, to produce as viewdata FSD after the filtration in Fig. 3.
Step 705
Store these information units that are not filtered.
Step 707
According to the sequential of received time of a plurality of information units in step 701 or these information units of recovering to be stored in step 705.To produce as viewdata TFSD after the timing recovery filtration in Fig. 3.
Step 709
With at least one alternative information unit, fill into these information units that are filtered, wherein each this alternative information unit has this sequential of its this information unit being filtered filling into, to produce, fills into rear viewdata NFSD as the blank package in Fig. 3.
Step 711
The described information unit and these the alternative information units that according to these sequential outputs of these sequential of a plurality of unit that are not filtered and alternative information unit, are not filtered.For example in output map 3, be stored viewdata SD
o.
Other detailed steps are disclosed in previous embodiment, therefore repeat no more in this.
By aforesaid embodiment, can viewdata can original sequential be output by the mode that fills into blank package, so can make user when viewing and admiring the viewdata storing, still there is fluency and the quality of the viewdata of viewing and admiring instant.And by the output speed of adjusting viewdata, can allow user experience better fluency and quality.
Claims (14)
1. a data access control method, comprises:
(a) receive a plurality of information units;
(b) filter at least one of described information unit;
(c) store the information unit not being filtered;
(d) according to the received time of a plurality of information units described in (a) step, recover the sequential of the information unit that is stored in (c) step;
(e) with at least one alternative information unit, fill into the information unit being filtered, wherein described in each, substitute the sequential that information unit has its information unit being filtered filling into; And
(f) according to the sequential of information unit and the sequential of described alternative information unit that are not filtered, information unit and described alternative information unit that output is not filtered.
2. data access control method as claimed in claim 1, is characterized in that, described information unit is a package, and described alternative information unit is a blank package.
3. data access control method as claimed in claim 1, is characterized in that, described (e) step comprises:
With the temporary described information unit of a plurality of buffer cells; And
If buffer cell detected, do not receive the information unit that should receive, fill into described alternative information unit.
4. data access control method as claimed in claim 1, is characterized in that, described step (f) also comprises:
Making one of them the summation of data quantity of the described information unit exported in a predetermined period and described alternative information unit, is a predetermined value.
5. data access control method as claimed in claim 1, is characterized in that, described (f) step comprises:
Described information unit is divided into a plurality of information unit parts;
While exporting described information unit part, make to have between at least one information unit part an output time spacing not; And
The summation of the data quantity that the data quantity of the described information unit part that makes to export in a predetermined period and described not output time spacing are corresponding is a predetermined value.
6. data access control method as claimed in claim 1, is characterized in that, described (f) step comprises:
Blank information unit is divided into a plurality of blank information unit parts;
While exporting described blank information unit part, make to have between at least one blank information unit part an output time spacing not; And
The summation of the data quantity that the data quantity of the described blank information unit part that makes to export in a predetermined period and described not output time spacing are corresponding is a predetermined value.
7. data access control method as claimed in claim 1, also comprises:
Control the data quantity that described (f) step is exported in a predetermined period, the data quantity receiving in described predetermined period with described (a) step equates.
8. a data access control device, comprises:
One filter, in order to receive and to filter wherein one at least of a plurality of information units;
One sequential tape deck, in order to produce the sequential of the information unit of described filter output according to the described received time of a plurality of information units;
One storage device, in order to store the information unit not filtered by described filter;
One time sequence recovery device, the timing recovery recording according to described sequential tape deck is by the sequential of the information unit of described storage device stores;
One substituting unit data insertion apparatus, fills into at least one alternative information unit the information unit being filtered, and wherein each alternative information unit has the sequential of its information unit being filtered filling into; And
One o controller, the information unit and the described alternative information unit that according to the sequential output of the sequential of a plurality of information units that are not filtered and described alternative information unit, are not filtered.
9. data access control device as claimed in claim 8, is characterized in that, described information unit is a package, and described alternative information unit is a blank package.
10. data access control device as claimed in claim 8, also comprises:
One information unit buffer, comprises a plurality of buffer cells, in order to temporary described information unit; And
One processing unit, does not receive the information unit that should receive if buffer cell detected, controls described substituting unit data insertion apparatus and fills into described alternative information unit.
11. data access control device as claimed in claim 8, also comprise a processing unit, described processing unit is controlled described o controller, and making one of them the summation of data quantity of described information unit that described o controller exports in a predetermined period and described alternative information unit is a predetermined value.
12. data access control device as claimed in claim 8, also comprise a processing unit, described processing unit is divided into a plurality of information unit parts by described information unit, and when controlling described o controller and making described o controller export described information unit part, make to have between at least one information unit part an output time spacing not, and the summation that makes data quantity corresponding to the data quantity of the information unit part that described o controller exports in a predetermined period and described not output time spacing is a predetermined value.
13. data access control device as claimed in claim 8, also comprise a processing unit, described processing unit is divided into a plurality of blank information unit parts by blank information unit, and when controlling described o controller and making the described blank information unit part of described o controller output, make to have between at least one blank information unit part an output time spacing not, and the summation that makes data quantity corresponding to the data quantity of the described blank information unit part that described o controller exports in a predetermined period and described not output time spacing is a predetermined value.
14. data access control device as claimed in claim 8, also comprise a processing unit, and described processing unit is controlled the data quantity that described o controller is exported in a predetermined period, and the data quantity receiving in described predetermined period with described filter equates.
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|---|---|---|---|
| CN201310090733.4A CN104065994B (en) | 2013-03-20 | 2013-03-20 | Data access control method and data access control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310090733.4A CN104065994B (en) | 2013-03-20 | 2013-03-20 | Data access control method and data access control device |
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| Publication Number | Publication Date |
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| CN104065994A true CN104065994A (en) | 2014-09-24 |
| CN104065994B CN104065994B (en) | 2018-06-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107017964A (en) * | 2015-12-21 | 2017-08-04 | 汤姆逊许可公司 | Method and apparatus for detecting the packet loss in stagger casting |
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| US5907660A (en) * | 1994-09-21 | 1999-05-25 | Mitsubishi Denki Kabushiki Kaisha | Digital video signal playback device with special playback data being in the form of a still image slice data |
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| CN104065994B (en) | 2018-06-08 |
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