CN106412698A - Method and device for realizing digital television fast descrambling - Google Patents
Method and device for realizing digital television fast descrambling Download PDFInfo
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- CN106412698A CN106412698A CN201610979923.5A CN201610979923A CN106412698A CN 106412698 A CN106412698 A CN 106412698A CN 201610979923 A CN201610979923 A CN 201610979923A CN 106412698 A CN106412698 A CN 106412698A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4367—Establishing a secure communication between the client and a peripheral device or smart card
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4627—Rights management associated to the content
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
Abstract
The embodiment of the invention discloses a method and device for realizing digital television fast descrambling. The method comprises the steps of receiving a channel switching instruction of switching to a target program inputted by a user, judging whether pre-stored authorization control information data has the target authorization control information of a target program, sending the target authorization control information to a smart card if so, receiving the control word returned by the smart card, setting a descrambler according to the control word, and descrambling the target program. In the technical scheme, when the pre-stored authorization control information data of a set-top box in the database has the authorization control information of the target program, the control word is extracted from the smart card directly according to the authorization control information to set the descrambler, the control word is obtained without through obtaining the program mapping table of the target program, analyzing and filtering and other operations, in the condition of occupying few hardware resources, the descrambling time of digital TV channel switching is reduced, and the fast descrambling is realized.
Description
Technical field
The present invention relates to digital TV field, more particularly, to a kind of method and apparatus realizing the quick descrambling of DTV.
Background technology
DTV provides the seeing and hearing enjoyment of abundant programme content and high-quality for people, compares simulated television, its letter
Number loss is little, reception is good, but it is exactly slow for scrambled program zapping that DTV has an obvious shortcoming, Consumer's Experience
Poor.
The method of the fast channel switching descrambling commonly used at present is to descramble three road programs simultaneously, simultaneously by before and after in the rendition list
Two programs parse CW (Control Word, control word), and all programs under current frequency are even all solved by some methods
Separate out CW it is contemplated that the sum of the limited use resource of top box inner treater, Filter (filter) limits and smart card communication
The factors such as time, the CW parsing all programs under current frequency is unpractical, and descrambles three road programs simultaneously and can take
More hardware resource.
Content of the invention
For solving Related Technical Issues, the present invention provides a kind of method and apparatus realizing the quick descrambling of DTV, can
Realize in the case of taking less hardware resource, to scrambled program quick descrambling zapping.
For achieving the above object, the embodiment of the present invention adopts the following technical scheme that：
In a first aspect, embodiments providing a kind of method realizing the quick descrambling of DTV, methods described bag
Include：
The zapping instruction switching to target program of receiving user's input；
Judge the target Entitlement Control Message whether having described target program in the Entitlement Control Message data prestoring；
If so, then send described target Entitlement Control Message to smart card, receive the control word that described smart card returns；
Descrambler is arranged according to described control word, descrambles described target program.
Second aspect, the embodiment of the present invention also correspondence provides a kind of device realizing the quick descrambling of DTV, described
Device includes：
Zapping instruction receiver module, for the zapping instruction switching to target program of receiving user's input；
Judge module, for judging the target mandate whether having described target program in the Entitlement Control Message data prestoring
Control information；
Whether control word extraction module, for judge module, for judging in the Entitlement Control Message data prestoring
State the target Entitlement Control Message of target program；If so, then send described target Entitlement Control Message to smart card, receive described
The control word that smart card returns；
First descrambling module, for arranging descrambler according to described control word, descrambles described target program.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought：
In the technical program, the zapping instruction switching to target program of receiving user's input, the mandate prestoring in judgement
Have in control information data target program Entitlement Control Message when, according to this Entitlement Control Message from smart card extract control
Word, arranges descrambler descrambles target program according to control word；In the technical program, the Entitlement Control Message that prestores in data base
Have in data target program Entitlement Control Message when, directly according to this Entitlement Control Message from smart card extract control word, no
Control word need to be obtained by obtaining the operations such as Program Map Table, the parsing filtration of target program, take less hardware resource
In the case of, reduce descrambling time during changing channels of digital television, realize quick descrambling.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in embodiment of the present invention description
Need use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only the present invention some enforcement
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be implemented according to the present invention
The content of example and these accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of method realizing the quick descrambling of DTV that the embodiment of the present invention one provides；
Fig. 2 is a kind of schematic flow sheet of method realizing the quick descrambling of DTV that the embodiment of the present invention two provides；
Fig. 3 is a kind of configuration diagram of device realizing the quick descrambling of DTV that the embodiment of the present invention three provides；
Fig. 4 is a kind of configuration diagram of device realizing the quick descrambling of DTV that the embodiment of the present invention four provides.
Specific embodiment
For make present invention solves the technical problem that, the technical scheme that adopts and the technique effect that reaches clearer, below
By combine accompanying drawing the technical scheme of the embodiment of the present invention is described in further detail it is clear that described embodiment only
It is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those skilled in the art exist
The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
Embodiment one
Refer to Fig. 1, it is a kind of stream of method realizing the quick descrambling of DTV that the embodiment of the present invention one provides
Journey schematic diagram.The method of the present embodiment can be executed by the Set Top Box of DTV, can be applicable to DTV switching program
Scene.
The method realizing the quick descrambling of DTV of the present embodiment, may include steps of：
S110：The zapping instruction switching to target program of receiving user's input.
Exemplary, user can be sent various by the Menu key on the remote control of DTV or panel to Set Top Box
Instruction, for example, switch to the zapping instruction of target program A, Set Top Box receives this zapping instruction.
S120：Judge the target Entitlement Control Message whether having target program in the Entitlement Control Message data prestoring.
Exemplary, the zapping instruction that Set Top Box response receives switches to target program A, reads target from data base
The programme information (include Transport ID, Source ID and service ID) of program A, according to this programme information from prestoring
Entitlement Control Message data in search whether the target Entitlement Control Message of target program A.
S130：If so, then send target Entitlement Control Message to smart card, receive the control word that smart card returns.
Exemplary, when the target authorization control finding target program A from the Entitlement Control Message data prestoring is believed
During breath, directly transfer this target Entitlement Control Message and send it to the smart card of DTV, smart card receives this mesh
Current control word is returned to Set Top Box after mark Entitlement Control Message.
S140：Descrambler is arranged according to control word, descrambles target program.
To sum up, in the technical program, the zapping instruction switching to target program of Set Top Box receiving user's input, when from
Find in the Entitlement Control Message data prestoring target program target Entitlement Control Message when, transfer this target authorization control
Information simultaneously sends it to smart card, receives the control word that smart card returns, and arranges descrambler according to this control word, descrambles target
Program；The technical program, can when the Entitlement Control Message data prestoring includes the target Entitlement Control Message of target program
Directly control word is extracted from smart card according to this target Entitlement Control Message, setting descrambler descrambles to target program, need not lead to
Cross and obtain the operations such as Program Map Table, the parsing filtration of target program to obtain control word, in the feelings taking less hardware resource
Under condition, reduce descrambling time during changing channels of digital television, realize quick descrambling.
Embodiment two
Refer to Fig. 2, it is a kind of stream of method realizing the quick descrambling of DTV that the embodiment of the present invention two provides
Journey schematic diagram.The present embodiment is differred primarily in that with embodiment, increased the Entitlement Control Message data of the front end transmission that prestores
Content, and further provide when there is no target Entitlement Control Message in the Entitlement Control Message data judging to prestore
Optional embodiment, and the optional embodiment after first time descrambles.
The method realizing the quick descrambling of DTV of the present embodiment, may include steps of：
S210：Prestore front end transmission Entitlement Control Message data.
Exemplary, the Entitlement Control Message data that front end sends can include the mandate of all programs under current frequency
Control information；Or the Entitlement Control Message data that front end sends can include all programs under current frequency and under adjacent frequency
Entitlement Control Message；Wherein, front end refers to cable TV station's machine room.
S220：The zapping instruction switching to target program of receiving user's input.
S230：Judge the target Entitlement Control Message whether having target program in the Entitlement Control Message data prestoring.
Exemplary, when there being the target Entitlement Control Message of target program in the Entitlement Control Message data prestoring, jump
Go to following S240；When there is no the target Entitlement Control Message of target program in the Entitlement Control Message data prestoring, redirect
To following S250.
S240：If so, then send target Entitlement Control Message to smart card, receive the control word that smart card returns.
Exemplary, after Set Top Box receives the control word that smart card returns, jump to following S270.
S250：If it is not, obtaining the Program Map Table of target program from front end and parsing, obtain corresponding parsing data and bag
Identifier information.
Exemplary, when there is no the target Entitlement Control Message of target program in the Entitlement Control Message data prestoring,
For obtaining the target Entitlement Control Message of target program, Set Top Box obtains the program map of target program from digital TV front-end
Table, parses this Program Map Table and obtains parsing data and package identifier information.
S260：According to filtration parameter and package identifier information setting filter to filter parsing data, obtain target mandate
Control information data simultaneously preserves, and searched targets Entitlement Control Message from target Entitlement Control Message data, according to target mandate
Control information extracts control word from smart card.
Exemplary, because Entitlement Control Message data is to change once every preset time period, the therefore filtration of filter
Parameter alternately changes, typically pass through filter filter obtain the filtration parameter of Entitlement Control Message data for 0x80 or
0x81, the filtration parameter of filter alternate between 0x80 and 0x81, such as when the filtration parameter of filter is 0x80,
When receiving new Entitlement Control Message data it is necessary to the filtration parameter of wave filter is revised as 0x81.Set Top Box according to
Filtration parameter and above-mentioned package identifier information setting filter carry out filtration treatment to above-mentioned parsing data, obtain and include target
The target Entitlement Control Message data of Entitlement Control Message, preserves this target Entitlement Control Message data, from this target mandate control
Retrieve target Entitlement Control Message in information data processed, send target Entitlement Control Message to smart card, receive smart card root
The control word returning according to this target Entitlement Control Message.
S270：Descrambler is arranged according to control word, descrambles target program.
S280：Jump to above-mentioned S260 every preset time period, until receiving zapping instruction or shutdown command again.
Exemplary, above-mentioned S210-S270 is the handling process that Set Top Box descrambles for the first time when switching program, due to mesh
Mark program is scrambled program, for realizing subsequently to play target program by normal received signal, needs persistently to carry out descrambling operation, one
As control word comprise odd even key, control word all can change every preset time period, the target mandate control of corresponding target program
Information processed also can change, such as every change in 10 seconds once, for realizing descrambling, then need above-mentioned every circulation execution in 10 seconds
S260, until receiving zapping instruction again or receiving the operation of shutdown command end loop.
It should be noted that the target program in the embodiment of the present invention refers to scrambled program, only scrambled program just needs
Descrambled, and descrambling need not be carried out for clear stream program and get final product normal received signal.
To sum up, in the technical program, the Entitlement Control Message data of the front end transmission that prestores, Set Top Box receiving user's input
The zapping instruction switching to target program, for the target being with or without target program in the Entitlement Control Message data prestoring
Two kinds of different situations of Entitlement Control Message carry out different disposal, when finding target from the Entitlement Control Message data prestoring
During the target Entitlement Control Message of program, transfer this target Entitlement Control Message and send it to smart card, receive smart card
The control word returning, arranges descrambler according to this control word, descrambles target program, subsequently also persistently descrambles to ensure signal just
Often receive；The technical program when the Entitlement Control Message data prestoring includes the target Entitlement Control Message of target program,
Directly control word can be extracted from smart card according to this target Entitlement Control Message, setting descrambler descrambles to target program, need not
To obtain control word by obtaining the operations such as Program Map Table, the parsing filtration of target program, to take less hardware resource
In the case of, reduce descrambling time during changing channels of digital television, realize quick descrambling.
It is below a kind of embodiment of device realizing the quick descrambling of DTV provided in an embodiment of the present invention, realize number
The device of the quick descrambling of word TV belongs to same inventive concept, in device with the above-mentioned method realizing the quick descrambling of DTV
Embodiment in not detailed description detail content, refer to the embodiment of said method.
Embodiment three
Refer to Fig. 3, it is a kind of reality of device realizing the quick descrambling of DTV that the embodiment of the present invention three provides
Apply example.
The device 300 realizing the quick descrambling of DTV of the present embodiment, can include following content：
Zapping instruction receiver module 310, for the zapping instruction switching to target program of receiving user's input.
Judge module 320, for judging the target mandate whether having target program in the Entitlement Control Message data prestoring
Control information.
Control word extraction module 330, for judging the mesh whether having target program in the Entitlement Control Message data prestoring
Mark Entitlement Control Message；If so, then send target Entitlement Control Message to smart card, receive the control word that smart card returns.
First descrambling module 340, for arranging descrambler according to control word, descrambles target program.
To sum up, in the technical program, the zapping instruction switching to target program of Set Top Box receiving user's input, when from
Find in the Entitlement Control Message data prestoring target program target Entitlement Control Message when, transfer this target authorization control
Information simultaneously sends it to smart card, receives the control word that smart card returns, and arranges descrambler according to this control word, descrambles target
Program；The technical program, can when the Entitlement Control Message data prestoring includes the target Entitlement Control Message of target program
Directly control word is extracted from smart card according to this target Entitlement Control Message, setting descrambler descrambles to target program, need not lead to
Cross and obtain the operations such as Program Map Table, the parsing filtration of target program to obtain control word, in the feelings taking less hardware resource
Under condition, reduce descrambling time during changing channels of digital television, realize quick descrambling.
Example IV
Refer to Fig. 4, it is a kind of reality of device realizing the quick descrambling of DTV that the embodiment of the present invention four provides
Apply example.The present embodiment is differred primarily in that with embodiment three, increased Entitlement Control Message data pre-storage module 410, program
Mapping table parsing module 460, the second descrambling module 470 and loop module 480.
The device 400 realizing the quick descrambling of DTV of the present embodiment, can include following content：
Entitlement Control Message data pre-storage module 410, for the Entitlement Control Message data of the front end transmission that prestores；Wherein,
Entitlement Control Message data includes the Entitlement Control Message of all programs under current frequency；Or Entitlement Control Message data includes
The Entitlement Control Message of all programs under current frequency and under adjacent frequency.
Zapping instruction receiver module 420, for the zapping instruction switching to target program of receiving user's input.
Judge module 430, for judging the target mandate whether having target program in the Entitlement Control Message data prestoring
Control information.
Control word extraction module 440, for judging the mesh whether having target program in the Entitlement Control Message data prestoring
Mark Entitlement Control Message；If so, then send target Entitlement Control Message to smart card, receive the control word that smart card returns.
First descrambling module 450, for arranging descrambler according to control word, descrambles target program.
Program Map Table parsing module 460, for judging whether there is target program in the Entitlement Control Message data prestoring
Target Entitlement Control Message；If it is not, obtaining the Program Map Table of target program from front end and parsing, obtain corresponding parsing number
According to and package identifier information.
Second descrambling module 470, for arranging filter to filter parsing number according to filtration parameter and package identifier information
According to, obtain target Entitlement Control Message data and preserve, searched targets authorization control letter from target Entitlement Control Message data
Breath, extracts control word according to target Entitlement Control Message from smart card, arranges descrambler according to control word, descrambles target program.
Loop module 480, for every above-mentioned second descrambling module 470 of preset time period loop start, up to again
Receive zapping instruction or shutdown command.
To sum up, in the technical program, the Entitlement Control Message data of the front end transmission that prestores, Set Top Box receiving user's input
The zapping instruction switching to target program, for the target being with or without target program in the Entitlement Control Message data prestoring
Two kinds of different situations of Entitlement Control Message carry out different disposal, when finding target from the Entitlement Control Message data prestoring
During the target Entitlement Control Message of program, transfer this target Entitlement Control Message and send it to smart card, receive smart card
The control word returning, arranges descrambler according to this control word, descrambles target program, subsequently also persistently descrambles to ensure signal just
Often receive；The technical program when the Entitlement Control Message data prestoring includes the target Entitlement Control Message of target program,
Directly control word can be extracted from smart card according to this target Entitlement Control Message, setting descrambler descrambles to target program, need not
To obtain control word by obtaining the operations such as Program Map Table, the parsing filtration of target program, to take less hardware resource
In the case of, reduce descrambling time during changing channels of digital television, realize quick descrambling.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other Equivalent embodiments more can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of method realizing the quick descrambling of DTV is it is characterised in that methods described includes：
The zapping instruction switching to target program of receiving user's input；
Judge the target Entitlement Control Message whether having described target program in the Entitlement Control Message data prestoring；
If so, then send described target Entitlement Control Message to smart card, receive the control word that described smart card returns；
Descrambler is arranged according to described control word, descrambles described target program.
2. the method for claim 1 is it is characterised in that the zapping switching to target program of described receiving user's input
Before instruction, also include：
Prestore front end transmission Entitlement Control Message data；
Wherein, described Entitlement Control Message data includes the Entitlement Control Message of all programs under current frequency.
3. the method for claim 1 is it is characterised in that the zapping switching to target program of described receiving user's input
Before instruction, also include：
Prestore front end transmission Entitlement Control Message data；
Wherein, described Entitlement Control Message data includes the authorization control letter of all programs under current frequency and under adjacent frequency
Breath.
4. the method as described in any one of claim 1-3 it is characterised in that judge in the Entitlement Control Message data that prestores be
After the no target Entitlement Control Message having a described target program, also include：
If it is not, obtaining the Program Map Table of described target program from front end and parsing, obtain corresponding parsing data and bag identification
Symbol information；
According to filtration parameter and described package identifier information setting filter to filter described parsing data, obtain target mandate control
Information data processed simultaneously preserves, and retrieves described target Entitlement Control Message, according to institute from described target Entitlement Control Message data
State target Entitlement Control Message and extract control word from smart card, descrambler is arranged according to described control word, descramble described target section
Mesh.
5., it is characterised in that described arrange descrambler according to described control word, descrambling is described for method as claimed in claim 4
After target program, also include：
Every preset time period execution described according to filtration parameter and described package identifier information setting filter to filter
State parsing data, obtain target Entitlement Control Message data and preserve, retrieve institute from described target Entitlement Control Message data
State target Entitlement Control Message, control word is extracted from smart card according to described target Entitlement Control Message, descrambler, descrambling are set
The step of described target program, until receive zapping instruction or shutdown command again.
6. a kind of device realizing the quick descrambling of DTV is it is characterised in that described device includes：
Zapping instruction receiver module, for the zapping instruction switching to target program of receiving user's input；
Judge module, for judging the target authorization control whether having described target program in the Entitlement Control Message data prestoring
Information；
Control word extraction module, for judge module, for judging whether there is described mesh in the Entitlement Control Message data prestoring
The target Entitlement Control Message of mark program；If so, then send described target Entitlement Control Message to smart card, receive described intelligence
The control word that card returns；
First descrambling module, for arranging descrambler according to described control word, descrambles described target program.
7. device as claimed in claim 6 is it is characterised in that described device also includes：
Entitlement Control Message data pre-storage module, for the Entitlement Control Message data of the front end transmission that prestores；
Wherein, described Entitlement Control Message data includes the Entitlement Control Message of all programs under current frequency.
8. device as claimed in claim 6 is it is characterised in that described device also includes：
Entitlement Control Message data pre-storage module, for the Entitlement Control Message data of the front end transmission that prestores；
Wherein, described Entitlement Control Message data includes the authorization control letter of all programs under current frequency and under adjacent frequency
Breath.
9. the device as described in any one of claim 6-8 is it is characterised in that described device also includes：
Program Map Table parsing module, for judging the mesh whether having described target program in the Entitlement Control Message data prestoring
Mark Entitlement Control Message；If it is not, obtaining the Program Map Table of described target program from front end and parsing, obtain corresponding parsing number
According to and package identifier information；
Second descrambling module, for arranging filter to filter described parsing number according to filtration parameter and described package identifier information
According to acquisition target Entitlement Control Message data simultaneously preserves, and retrieves described target and award from described target Entitlement Control Message data
Power control information, extracts control word according to described target Entitlement Control Message from smart card, arranges descrambling according to described control word
Device, descrambles described target program.
10. device as claimed in claim 9 is it is characterised in that described device also includes：
Loop module, for every above-mentioned second descrambling module of preset time period loop start, until receive zapping again
Instruction or shutdown command.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610979923.5A CN106412698B (en) | 2016-11-08 | 2016-11-08 | Method and device for realizing quick descrambling of digital television |
| PCT/CN2017/109052 WO2018086477A1 (en) | 2016-11-08 | 2017-11-02 | Digital television descrambling method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610979923.5A CN106412698B (en) | 2016-11-08 | 2016-11-08 | Method and device for realizing quick descrambling of digital television |
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| CN106412698B CN106412698B (en) | 2019-12-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018086477A1 (en) * | 2016-11-08 | 2018-05-17 | 深圳创维数字技术有限公司 | Digital television descrambling method and device |
| CN108289240A (en) * | 2018-01-30 | 2018-07-17 | 深圳创维数字技术有限公司 | Method, terminal and the computer-readable medium of DTV fast channel switching |
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| WO2018086477A1 (en) * | 2016-11-08 | 2018-05-17 | 深圳创维数字技术有限公司 | Digital television descrambling method and device |
| CN108737886A (en) * | 2017-04-25 | 2018-11-02 | 澜至电子科技（成都）有限公司 | Fast switching system, method and the top box of digital machine of digital program |
| CN108289240A (en) * | 2018-01-30 | 2018-07-17 | 深圳创维数字技术有限公司 | Method, terminal and the computer-readable medium of DTV fast channel switching |
| CN108289240B (en) * | 2018-01-30 | 2021-02-09 | 深圳创维数字技术有限公司 | Method, terminal and computer readable medium for quickly changing channels of digital television |
| CN108777813A (en) * | 2018-06-28 | 2018-11-09 | 广州视源电子科技股份有限公司 | Switching method, device, terminal and the storage medium of scrambled number TV programme |
| CN108777813B (en) * | 2018-06-28 | 2021-04-20 | 广州视源电子科技股份有限公司 | Switching method, device, terminal and storage medium of scrambled digital television program |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018086477A1 (en) | 2018-05-17 |
| CN106412698B (en) | 2019-12-13 |
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