CN105245941B - A kind of encrypted television program switching method and device - Google Patents
A kind of encrypted television program switching method and device Download PDFInfo
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- CN105245941B CN105245941B CN201510642672.7A CN201510642672A CN105245941B CN 105245941 B CN105245941 B CN 105245941B CN 201510642672 A CN201510642672 A CN 201510642672A CN 105245941 B CN105245941 B CN 105245941B
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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
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream decryption
-
- 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]
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a kind of encrypted television program switching method and devices, to solve during encrypted television program switches, the problem of needing to perform the process that release encrypted television program plays required resource and creates the resource needed for encrypted television program broadcasting repeatedly, cause encrypted television program switching efficiency low.This method is：TV programme to be played are determined as the first encrypted television program and determine it is not when playing encrypted television program for the first time, stop obtaining the Entitlement Control Message ECM of the second encrypted television program of demultiplexing channel current bindings, the solution binding mark of audio of the second encrypted television program of descrambler current bindings and the mark of video；The mark of the mark of the audio of first encrypted television program and video is tied to descrambler, using the mark configuration demultiplexing channel of the ECM of the first encrypted television program, obtains the ECM of the first encrypted television program in real time by demultiplexing channel.
Description
Technical field
The present invention relates to technical field of video processing more particularly to a kind of encrypted television program switching methods and device.
Background technology
TV programme are divided into encrypted television program and non-encrypted TV programme at present.
For non-encrypted TV programme, set-top box only needs demultiplexing to obtain the TS streams of Voice and Video, and decoding plays
The broadcasting of TV programme can be realized in transmission (Transport Stream, TS) stream of the Voice and Video arrived.
For encrypted television program, as shown in Figure 1, TS streams are handled as follows in front end：
TS streams pass through scrambler, and TS streams are scrambled using pseudo-random sequence by scrambler, wherein, pseudo-random sequence is straight
It connects and is generated by pseudo-random sequence generator (PRBSG), the control word that pseudo-random sequence generator is generated by control word (CW) module
Control, CW needs are encrypted.The ciphertext for CW being encrypted generation is known as Entitlement Control Message (ECM), and ECM passes through multiplexer
It is transmitted together with scrambled TS streams, wherein, the information such as time, program price, program authorization control, therefore ECM are also included in ECM
It is the management information towards program.It is known as business cipher key (SK) to the key that CW is encrypted, SK is called a moon key, usually monthly
It changes once, will again all users be authorized by often changing a SK system.Wherein, using personal distribution public key
(PDK) SK is encrypted, generated ciphertext and by Subscriber Management System (SMS) to SAS Subscriber Authorization System send authorize refer to
Enable the authorization message composition Entitlement Management Message (EMM) of generation.EMM is user oriented management information, and EMM watches user
Section object time and the channel watched are authorized, and EMM is sent together by multiplexer and scrambled TS streams.
Therefore, for encrypted television program, it is scrambled TS streams that the demultiplexer of set-top box, which extracts, it is impossible to directly be broadcast
It puts, needs that TS streams are decrypted, then the TS streams after decryption are sent to decoder, broadcasting for TV programme can just be encrypted
It puts.
At present, before encrypted television program is played it is first determined whether be for the first time play encrypted television program, if
Encrypted television program is played for the first time, needs to distribute the descrambler of Voice and Video, binding according to the encrypted television program of broadcasting
The mark of audio and the mark of video to distribution descrambler, according to the mark of the ECM of encrypted television program and according to from item
Part receives data filtering condition distribution demultiplexing (demux) channel for the ECM that system (CAS) obtains and setting demultiplexing channel
Data filtering condition, open demultiplexing channel, the timer (timer) for real-time monitoring data is created and enables, with reality
When obtain ECM, the ECM of acquisition is sent to smart card to solve CW, CW is sent to descrambler, Voice and Video is solved
It is close.
If not playing encrypted television program for the first time, Off Timer is needed, stops receiving ECM and release timer money
Source closes demultiplexing channel, the caching for demultiplexing channel is resetted, and discharge demultiplexing channel resource, and to descrambler
Bound Voice and Video carries out solution binding, discharges descrambler resource, then repeats to play encrypted television program for the first time
Process.
In conclusion during encrypted television program switches, need to perform release encrypted television program broadcasting repeatedly
Required resource and create encrypted television program play needed for resource process, lead to what is switched between encrypted television program
Efficiency is low.
Invention content
The embodiment of the present invention provides a kind of encrypted television program switching method and device, to solve in encrypted television program
During switching, need to perform resource and establishment encrypted television program needed for release encrypted television program broadcasting repeatedly and broadcast
The problem of putting the process of required resource, causing the efficiency switched between encrypted television program low.
Specific technical solution provided in an embodiment of the present invention is as follows：
In a first aspect, a kind of encrypted television program switching method is provided, including：
TV programme to be played are determined as the first encrypted television program, and determine it is not to play scrambled TV service section for the first time
During mesh, stop obtaining the Entitlement Control Message ECM of the second encrypted television program of demultiplexing channel current bindings, solution binding descrambling
The mark of audio of second encrypted television program and the mark of video of device current bindings；
The mark of audio of first encrypted television program and the mark of video are tied to the descrambler, using institute
The demultiplexing channel is configured in the mark for stating the ECM of the first encrypted television program, and institute is obtained in real time by the demultiplexing channel
State the ECM of the first encrypted television program.
In implementation, stop obtaining the Entitlement Control Message ECM of the second encrypted television program of demultiplexing channel current bindings,
It further includes：
Discharge the data in the caching of the demultiplexed data channel.
In implementation, stop obtaining the Entitlement Control Message ECM of the second encrypted television program of demultiplexing channel current bindings,
It further includes：
Stop timer, the timer obtains the second scrambled TV service section for monitoring the demultiplexing channel in real time
The time interval of purpose ECM.
In implementation, obtain the ECM of first encrypted television program in real time by the demultiplexing channel, further include：
Restart the timer.
In implementation, the demultiplexing channel is configured using the mark of the ECM of first encrypted television program, including：
The demultiplexing channel is configured, first TV programme are obtained according to the mark of the ECM of first TV programme
ECM.
Second aspect provides a kind of encrypted television program switching device, including：
First processing module for determining TV programme to be played as the first encrypted television program, and determines it is not the
During primary broadcasting encrypted television program, stop obtaining the authorization control of the second encrypted television program of demultiplexing channel current bindings
Information ECM, the solution binding mark of audio of second encrypted television program of descrambler current bindings and the mark of video；
Second processing module, for the mark of audio of first encrypted television program and the mark of video to be tied to
The descrambler is configured the demultiplexing channel using the mark of the ECM of first encrypted television program, is demultiplexed by described
Obtain the ECM of first encrypted television program in real time with channel.
In implementation, the first processing module is specifically used for：
Discharge the data in the caching of the demultiplexed data channel.
In implementation, the first processing module is specifically used for：
Stop timer, the timer obtains the second scrambled TV service section for monitoring the demultiplexing channel in real time
The time interval of purpose ECM.
In implementation, the Second processing module is additionally operable to：
Restart the timer.
In implementation, the Second processing module is specifically used for：
The demultiplexing channel is configured, first TV programme are obtained according to the mark of the ECM of first TV programme
ECM.
Based on above-mentioned technical proposal, in the embodiment of the present invention, during encrypted television program is switched, one is not discharged
It is secondary to play demultiplexing channel and the descrambler resource that encrypted television program is created, and it is off demultiplexing channel and descrambler
Current operation carries out demultiplexed data channel and descrambler weight using the relevant parameter of encrypted television program to be played
It is new to start demultiplexed data channel and descrambler with postponing, so as to solve during encrypted television program switches, need
Release encrypted television program is performed repeatedly to play required resource and create the resource needed for encrypted television program broadcasting
Process, the problem of causing the efficiency switched between encrypted television program low, improve the switching efficiency of encrypted television program.
Description of the drawings
Fig. 1 is the front-end processing function structure schematic diagram of encrypted television program；
Fig. 2 is the method detailed flow diagram that encrypted television program switches in the embodiment of the present invention；
Fig. 3 is the method detailed flow diagram that set-top box plays encrypted television program for the first time in the embodiment of the present invention；
Fig. 4 is the method detailed flow diagram that TV programme switching is encrypted in set-top box in the embodiment of the present invention；
Fig. 5 is encrypted television program switching device structure diagram in the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing into
It is described in detail to one step, it is clear that described embodiment is only the implementation of part of the embodiment of the present invention rather than whole
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
All other embodiment, shall fall within the protection scope of the present invention.
In the embodiment of the present invention, as shown in Fig. 2, the method detailed flow of TV programme switching is encrypted such as in set-top box
Under：
Step 201：TV programme to be played are determined as the first encrypted television program, and determine it is not to play to add for the first time
During close TV programme, stop obtaining the ECM of the second encrypted television program of demultiplexing channel current bindings, solution binding descrambler is worked as
The mark of audio of second encrypted television program of preceding binding and the mark of video.
In implementation, stop obtaining the ECM of the second encrypted television program of demultiplexing channel current bindings, and discharge the solution
Data in the caching of multiplex channel, but do not discharge the demultiplexing channel.
In implementation, stop obtaining the ECM of the second encrypted television program of demultiplexing channel current bindings, and stop timing
Device, but the timer resource is not discharged, which obtains the second scrambled TV service section for monitoring the demultiplexing channel in real time
The time interval of purpose ECM,.If timer expiry, the ECM of the second encrypted television program is not got by demultiplexing yet, then
The related prompting of ECM has not been obtained in prompting.
Step 202：The mark of the mark of the audio of first encrypted television program and video is tied to the descrambler, is used
The demultiplexing channel is configured in the mark of the ECM of first encrypted television program, obtains the first encryption in real time by the demultiplexing channel
The ECM of TV programme.
In implementation, the ECM of the first encrypted television program is obtained in real time by the demultiplexing channel, and it is fixed to restart this
When device.
In implementation, which is configured using the mark of the ECM of the first encrypted television program, specially：Configuration should
Demultiplexing channel is the TS streams for the mark that filtering obtains the ECM comprising first TV programme.
Specifically, the demultiplexing is configured using the mark and data filtering condition of the ECM of the first encrypted television program to lead to
Road, wherein, the mark of the ECM of the first encrypted television program is obtained from the TS streams of the first encrypted television program, data filtering
Condition is to be obtained from condition receiving system (CAS), and data filtering condition is corresponding with the Encryption Algorithm that front end uses.
In the embodiment of the present invention, during encrypted television program is switched, last broadcasting scrambled TV service section is not discharged
The demultiplexing channel and descrambler resource that mesh is created, and demultiplexing channel and the current operation of descrambler are off, it uses
After the relevant parameter of encrypted television program to be played reconfigures demultiplexed data channel and descrambler, start solution
Multiplex data channel and descrambler so as to solve during encrypted television program switches, need to perform release repeatedly
Encrypted television program plays required resource and creates the process that encrypted television program plays required resource, causes encryption electric
The problem of efficiency depending on switching between program is low improves the switching efficiency of encrypted television program.
The process that the encrypted television program provided below by way of two specific embodiments to the embodiment of the present invention switches into
Row is described in detail.
In first specific embodiment, as shown in figure 3, the process that set-top box plays encrypted television program for the first time is as follows：
Step 301：It is determined as playing encrypted television program for the first time, parses the TS streams of encrypted television program to be played, obtain
The ECM that the TS is taken to be carried in flowing, and increase ECM resources, which includes the mark of resource type, TV programme to be played
Knowledge, type of message (increase or update) and Program Map Table payload (pmt payload；Pmt, Program Map
Table) information, the pmt payload information include：The type and mark of Voice and Video, ECM marks etc.；
Step 302：Descrambler is distributed, and binds the mark of the audio of encrypted television program to be played and the mark of video
To the descrambler of distribution；
Step 303：The mark of ECM that TS streams according to encrypted television program to be played is parsed obtain, setting demultiplexing
The filter condition of channel so that the ECM of the encrypted television program to be played is obtained by demultiplexing Channel filtration, opening demultiplexes
Use channel；
Step 304：It creates and starts timer (timer), which obtained for real time monitoring between the time of ECM
Every；
Step 305：ECM is sent to smart card, and obtains smart card and the CW obtained is parsed from ECM；
Step 306：CW is transferred to descrambler, the Voice and Video of binding is decrypted according to the CW by descrambler；
Step 307：The Voice and Video after decryption is played out by playing module.
In second specific embodiment, as shown in figure 4, set-top box determines TV programme to be played as encrypted television program,
And be not to play encrypted television program for the first time, the process for carrying out TV programme switching is as follows：
Step 401：Stop obtaining the ECM of the TV programme of current bindings, and the caching for demultiplexing channel is resetted；
The mark of mark and video to the audio of the TV programme of descrambler current bindings carries out solution binding；Stop timer；But
Descrambler, demultiplexing channel and timer resource are not discharged；
Step 402：ECM resources, updated ECM resources are updated using the relevant information of encrypted television program to be played
Including resource type, TV Festival purpose mark, type of message (increase or update), wherein pmt payload information includes：Audio
Type and mark, ECM marks with video etc.；
Step 403：By the most upper encryption electricity of the mark of the audio of TV programme to be played and the binding of the mark of video
Depending on the descrambler of program distribution；
Step 404：The demultiplexing channel of encrypted television program distribution is re-set as, i.e., using TV to be played
The mark of the ECM of program sets the filter condition of the demultiplexing channel so that demultiplexing Channel filtration obtains the electricity to be played
Depending on the ECM of program；
Step 405：The timer distributed for a upper encrypted television program is restarted, it is to be played to obtain this with real time monitoring
TV programme ECM time interval；
Step 406：The ECM for demultiplexing channel acquisition is sent to smart card, and obtains what smart card parsing ECM was obtained
CW；
Step 407：CW is transferred to descrambler, the Voice and Video of binding is decrypted according to the CW by descrambler；
Step 408：The Voice and Video after decryption is played out by playing module.
Based on same inventive concept, a kind of encrypted television program switching device, such as Fig. 5 are additionally provided in the embodiment of the present invention
Shown, which mainly includes：
First processing module 501, for determining TV programme to be played as the first encrypted television program, and determine be not
When playing encrypted television program for the first time, stop obtaining the mandate control of the second encrypted television program of demultiplexing channel current bindings
Information ECM processed, the solution binding mark of audio of second encrypted television program of descrambler current bindings and the mark of video；
Second processing module 502, for the mark of audio of first encrypted television program and the mark of video to be tied up
The demultiplexing channel is configured using the mark of the ECM of first encrypted television program, by described in the fixed extremely descrambler
Demultiplexing channel obtains the ECM of first encrypted television program in real time.
In implementation, first processing module 501 is specifically used for the data in the caching for discharging the demultiplexed data channel.
In implementation, first processing module 501 is specifically used for：Stop obtaining the second encryption electricity of demultiplexing channel current bindings
Depending on the ECM of program, and stop timer, the timer adds for monitoring the demultiplexing channel acquisition described second in real time
The time interval of the ECM of close TV programme.
In implementation, Second processing module 502 is additionally operable to obtain the first encryption electricity in real time by the demultiplexing channel
Depending on the ECM of program, and restart the timer, the first scrambled TV service section is obtained for monitoring the demultiplexing channel in real time
The time interval of purpose ECM.
In implementation, Second processing module 502 is specifically used for being configured the demultiplexing channel according to first TV programme
The mark of ECM obtain the ECM of first TV programme.
Based on above-mentioned technical proposal, in the embodiment of the present invention, during encrypted television program is switched, one is not discharged
It is secondary to play demultiplexing channel and the descrambler resource that encrypted television program is created, and it is off demultiplexing channel and descrambler
Current operation carries out demultiplexed data channel and descrambler weight using the relevant parameter of encrypted television program to be played
It is new to start demultiplexed data channel and descrambler with postponing, so as to solve during encrypted television program switches, need
Release encrypted television program is performed repeatedly to play required resource and create the resource needed for encrypted television program broadcasting
Process, the problem of causing the efficiency switched between encrypted television program low, improve the switching efficiency of encrypted television program.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the present invention
Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the present invention
The shape of computer program product that usable storage medium is implemented on (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device of function specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of encrypted television program switching method, which is characterized in that including：
TV programme to be played are determined as the first encrypted television program, and determine it is not to play encrypted television program for the first time
When, stop obtaining the Entitlement Control Message ECM of the second encrypted television program of demultiplexing channel current bindings, solve binding descrambler
The mark of audio of second encrypted television program and the mark of video of current bindings, while it is logical not discharge the demultiplexing
The resource in road and the descrambler；
The mark of audio of first encrypted television program and the mark of video are tied to the descrambler, using described
The demultiplexing channel is configured in the mark of the ECM of one encrypted television program, and described the is obtained in real time by the demultiplexing channel
The ECM of one encrypted television program.
2. the method as described in claim 1, which is characterized in that stop obtaining the second encryption electricity of demultiplexing channel current bindings
Depending on the Entitlement Control Message ECM of program, further include：
Discharge the data in the caching of the demultiplexing channel.
3. the method as described in claim 1, which is characterized in that stop obtaining the second encryption electricity of demultiplexing channel current bindings
Depending on the Entitlement Control Message ECM of program, further include：
Stop timer, the timer is used to monitor the demultiplexing channel acquisition second encrypted television program in real time
The time interval of ECM.
4. method as claimed in claim 3, which is characterized in that first encryption is obtained by the demultiplexing channel in real time
The ECM of TV programme, further includes：
Restart the timer.
5. the method as described in claim 1, which is characterized in that the mark using the ECM of first encrypted television program is matched
The demultiplexing channel is put, including：
The demultiplexing channel is configured, first scrambled TV service is obtained according to the mark of the ECM of first encrypted television program
The ECM of program.
6. a kind of encrypted television program switching device, which is characterized in that including：
First processing module for determining TV programme to be played as the first encrypted television program, and determines it is not for the first time
When playing encrypted television program, stop obtaining the Entitlement Control Message of the second encrypted television program of demultiplexing channel current bindings
ECM, the solution binding mark of audio of second encrypted television program of descrambler current bindings and the mark of video, while not
Discharge the resource of the demultiplexing channel and the descrambler；
Second processing module, it is described for the mark of audio of first encrypted television program and the mark of video to be tied to
The demultiplexing channel is configured using the mark of the ECM of first encrypted television program in descrambler, logical by the demultiplexing
Road obtains the ECM of first encrypted television program in real time.
7. device as claimed in claim 6, which is characterized in that the first processing module is specifically used for：
Discharge the data in the caching of the demultiplexing channel.
8. device as claimed in claim 6, which is characterized in that the first processing module is specifically used for：
Stop timer, the timer is used to monitor the demultiplexing channel acquisition second encrypted television program in real time
The time interval of ECM.
9. device as claimed in claim 8, which is characterized in that the Second processing module is additionally operable to：
Restart the timer.
10. device as claimed in claim 6, which is characterized in that the Second processing module is specifically used for：
The demultiplexing channel is configured, first scrambled TV service is obtained according to the mark of the ECM of first encrypted television program
The ECM of program.
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| CN108737886B (en) * | 2017-04-25 | 2021-02-26 | 澜至电子科技（成都）有限公司 | System and method for quickly switching digital programs and digital set top box |
| 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 |
| CN109451337B (en) * | 2018-12-26 | 2020-10-20 | 深圳创维数字技术有限公司 | Descrambling processing method, device, equipment and computer readable storage medium |
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| CN102595236A (en) * | 2012-01-31 | 2012-07-18 | 深圳创维数字技术股份有限公司 | Set top box and method thereof for changing channels of digital television |
| CN102665105A (en) * | 2012-05-15 | 2012-09-12 | 山东泰信电子有限公司 | Method for realizing rapid channel change of digital television terminal |
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