CN106658151A - Method and device for rapidly changing station of digital television - Google Patents
Method and device for rapidly changing station of digital television Download PDFInfo
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- CN106658151A CN106658151A CN201611073575.1A CN201611073575A CN106658151A CN 106658151 A CN106658151 A CN 106658151A CN 201611073575 A CN201611073575 A CN 201611073575A CN 106658151 A CN106658151 A CN 106658151A
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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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4383—Accessing a communication channel
- H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
-
- 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
- H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
-
- 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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
-
- 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]
Abstract
The embodiment of the invention discloses a method and device for rapidly changing stations of a digital television. The method for rapidly changing the stations of the digital television comprises the following steps: receiving a station change instruction of switching to a target program which is input by a user, querying target control words of the target program in a control word data table stored in a set-top box, and if the target control words exist, setting a descrambler in accordance with the target control words to descramble and play the target program data flow which is pushed to the set-top box by the service front end; and after the terminal receives the station change instruction, querying the control word data table stored in the set-top box, and when the target control words of the target program exist in the control word data table, ensuring that the descrambler can be set according to the target control words to descramble the target program and switch to the target program. Thereby, rapid station changing and descrambling can be achieved, and the user experience can be improved.
Description
Technical field
The present invention relates to digital TV field, more particularly to a kind of method and apparatus for realizing DTV fast channel switching.
Background technology
DTV provides the seeing and hearing enjoyment of the programme content and high-quality enriched for people, compares simulated television, its letter
Number little, reception of loss is good, but it is exactly the Consumer's Experience for scrambled program zapping is slow that DTV has an obvious shortcoming
It is poor.
At present digital television system realizes the broadcasting of program with smart card, Set Top Box and service front-end.Before service
End sends the scrambled transmission streams of program to Set Top Box, and Set Top Box needs CW (Control Word, the control based on the program
Word) descrambler in Set Top Box is set, so as to scrambled transmission streams are carried out with lasting descrambling, and then play.
The acquisition of program CW, needs first to obtain ECM (Entitlement Control Message, mandate from service front-end
Control information) packet, and then the ECM data of program are selected from ECM packets, then parsed according to ECM data by smart card
Obtain the CW of the program.Said process is loaded down with trivial details, and the acquisition of each program CW takes certain hardware resource and communication resources.
So, when needing to switch program according to user's control, need to repeat above-mentioned flow process, cause to switch program
Response speed is slow.If together arranging multiple CW in descrambler while obtaining multiple CW for fast channel switching, then obtaining
During multiple CW, need to take filter resources and the communication resources between Set Top Box and smart card simultaneously, this will be subject to
The hardware limitation of filter, and yet suffer from parsing the slow-footed problems of CW.
The content of the invention
To solve Related Technical Issues, the present invention provides a kind of method and apparatus for realizing DTV fast channel switching, real
In the case of taking less hardware resource now, scrambled program fast channel switching is descrambled, and possess general applicability.
For achieving the above object, the embodiment of the present invention is adopted the following technical scheme that：
In a first aspect, embodiments providing a kind of method for realizing DTV fast channel switching, methods described bag
Include：
The zapping instruction for switching to target program of receiving user's input；
The target control word of the target program is inquired about in the control word tables of data of Set Top Box storage；
If there is the target control word, then descrambler is arranged according to the target control word, to descramble service front-end
Push to the target program data stream of Set Top Box and play out.
Second aspect, the embodiment of the present invention also accordingly provides a kind of device for realizing DTV fast channel switching, institute
Stating device includes：
Zapping instruction receiver module, for the zapping instruction for switching to target program of receiving user's input；
Target control word enquiry module, for inquiring about the target program in the control word tables of data that stores in Set Top Box
Target control word；
First descrambling playing module, for if there is the target control word, then being arranged according to the target control word
Descrambler, pushes to the target program data stream of Set Top Box and plays out to descramble service front-end.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought：
In the technical program, the zapping instruction for switching to target program of receiving user's input, in the control of Set Top Box storage
The target control word of the target program is inquired about in digital data table processed, if there is the target control word, then according to the mesh
Mark control word arranges descrambler, pushes to the target program data stream of Set Top Box and plays out to descramble service front-end.Pass through
The control word tables of data stored in inquiry Set Top Box, when there is the target control word of target program in the control word tables of data,
Descrambler descrambles target program can be arranged according to the target control word, switch to target program, realize that fast channel switching descrambles.
Description of the drawings
Technical scheme in order to be illustrated more clearly that the embodiment of the present invention, below will be to institute in embodiment of the present invention description
The accompanying drawing that needs are used is briefly described, it should be apparent that, drawings in the following description are only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to present invention enforcement
The content of example and these accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of method for realizing DTV fast channel switching that the embodiment of the present invention one is provided；
Fig. 2 is a kind of schematic flow sheet of method for realizing DTV fast channel switching that the embodiment of the present invention two is provided；
Fig. 3 is the schematic flow sheet of the optional embodiment of the generation control word tables of data that the embodiment of the present invention three is provided；
Fig. 4 is a kind of configuration diagram of device for realizing DTV fast channel switching that the embodiment of the present invention four is provided；
Fig. 5 is a kind of configuration diagram of device for realizing DTV fast channel switching that the embodiment of the present invention five is provided；
Fig. 6 is the framework of the optional embodiment of the control word tables of data generation module 610 that the embodiment of the present invention six is provided
Schematic diagram.
Specific embodiment
For make present invention solves the technical problem that, the technical scheme that adopts and the technique effect that reaches it is clearer, below
Accompanying drawing will be combined to be described in further detail the technical scheme of the embodiment of the present invention, it is clear that described embodiment is only
It is a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those skilled in the art exist
The every other embodiment obtained under the premise of creative work is not made, the scope of protection of the invention is belonged to.
Embodiment one
Fig. 1 is refer to, it is a kind of stream of method for realizing DTV fast channel switching that the embodiment of the present invention one is provided
Journey schematic diagram.The method of the present embodiment can be performed by the terminal that Set Top Box and smart card are constituted, it is adaptable to which user is to scrambling
Program carries out the scene of zapping operation.
The method for realizing DTV fast channel switching of the present embodiment, may include steps of：
S110：The zapping instruction for switching to target program of receiving user's input.
Exemplary, when the user for watching TV programme has zapping demand, user can be by the remote control of Set Top Box
Control panel input on device or television set switches to the zapping instruction of target program, and Set Top Box receives this and instructs and make corresponding
Response, from database read target program programme information (including Transport ID, Source ID and service
ID), target program can be uniquely determined by the programme information.
S120：The target control word of target program is inquired about in the control word tables of data of Set Top Box storage.
Exemplary, be stored with a control word tables of data in Set Top Box internal memory, and the tables of data includes the section of each program
Mesh information and control word corresponding with each program, inquire about and mesh according to the programme information of target program from the control word tables of data
The corresponding target control word of mark program.
S130：If there is target control word, then descrambler is arranged according to target control word, to descramble service front-end push
To Set Top Box target program data stream and play out.
Exemplary, when the target control word of target program is inquired in control word tables of data, the direct root of Set Top Box
Descrambler is set according to the target control word, the target program data stream in the transport stream that will be obtained from service front-end is descrambled,
And play the program data output after descrambling, realize fast channel switching.
It should be noted that the program mentioned in the embodiment of the present invention refers both to scrambled program, only for scrambled program
It is related to descrambling and fast channel switching problem.
To sum up, in the technical program, the zapping instruction for switching to target program of terminal receiving user's input, on machine top
The target control word of the target program is inquired about in the control word tables of data of box storage, if there is the target control word, then
Descrambler is arranged according to the target control word, the target program data stream of Set Top Box is pushed to and is carried out to descramble service front-end
Play.Terminal by the control word tables of data that stores in inquiry Set Top Box, when there is target program in the control word tables of data
During target control word, descrambler descrambles target program can be arranged according to the target control word, switch to target program, be realized quick
Zapping descrambles.
Embodiment two
Fig. 2 is refer to, it is a kind of stream of method for realizing DTV fast channel switching that the embodiment of the present invention two is provided
Journey schematic diagram.The present embodiment is differred primarily in that with embodiment one, on the basis of embodiment one, be increased when control number of words
According to the handling process during target control word that there is no target program in table.
When there is no the target control word of target program in control word tables of data, the present embodiment realizes that DTV is fast
The method of quick change platform, can also comprise the steps after above-mentioned S120：
S210：If there is no target control word, then the handover request of target program is sent to service front-end.
Exemplary, at some in particular cases, the control word tables of data of Set Top Box storage can not completely include all sections
Purpose programme information and control word.For example, service front-end is configured with 10 road programs for certain frequency, but this frequency is at most only
8 road programs can simultaneously be supported, then the also program data stream of 2 road programs not in the transport stream of server front end, therefore, when
User requires to switch to this 2 road program for the moment, and the programme information and phase less than this 2 road program is inquired about from control word tables of data
The control word answered；Again for example, when user requires to switch to the program under the adjacent frequency of current frequency, before service
The program data stream of each program under current frequency is only included in the transport stream at end, therefore, now inquire about in tables of data in control
The target control word of fall short program.
When the target control word without target program in control word tables of data, Set Top Box is according to the zapping instruction for receiving
The handover request for switching to target program is sent to service front-end, to ask service front-end to add the program data of target program
To transport stream and it is transferred to Set Top Box.
S220：The transport stream that service front-end sends is received, the Program Map Table PMT of target program is obtained from transport stream simultaneously
Parsing, obtains package identifier PID corresponding with Entitlement Control Message ECM packets.
Exemplary, Set Top Box receives the transport stream that service front-end sends, according to the programme information of target program from the biography
The Program Map Table (Program Map Table, PMT) of target program is extracted in defeated stream, the PMT is parsed, obtained
Package identifier PID corresponding with the ECM packets in transport stream.
S230：Filter is arranged according to filtration parameter and PID, ECM packets are obtained with filter transport stream.
Exemplary, the scope of filtration parameter pre-sets, filtration parameter checker between 0x80 and 0x81,
For example, current filtration parameter is 0x80, then filtration parameter is revised as into 0x81 after ECM packets are received again.Machine top
Box arranges filter according to preset filtration parameter and the corresponding PID of ECM packets, filters the transmission obtained from service front-end
Stream, obtains the ECM packets in transport stream.
S240：EMC packets are transferred to into smart card, and obtain the target that smart card determines according to EMC resolve packets
Control word.
Exemplary, the ECM packets of acquisition are transferred to smart card by Set Top Box, and smart card is decrypted the ECM packets and obtained
Obtain and control digital packets accordingly, the control digital packets are returned to Set Top Box by smart card, and Set Top Box is according to target program
Programme information extracts the target control word of target program from the control digital packets.
S250：Target control word is updated in control word tables of data.
It is exemplary, Set Top Box according to the programme information of each program, by the control word of target control word and other programs more
Newly in control word tables of data.
S260：Descrambler is arranged according to target control word, to descramble the target number of programs that service front-end pushes to Set Top Box
According to flowing and play out.
Exemplary, Set Top Box arranges descrambler according to the target control word for extracting, descrambler descrambles service front-end
The program data stream of target program in transport stream, obtains the program data of target program and exports broadcasting.
Preferably, ECM packets include the ECM data of all programs under current frequency.
Preferably, ECM packets include current frequency under and adjacent frequency under all programs ECM data.
To sum up, in the technical program, when the target control word that there is no target program in Set Top Box control word tables of data
When, terminal Jing obtains the PMT of target program, parsing PMT, filters the operation such as ECM packets and smart card communication, obtains target section
Purpose target control word is simultaneously updated to control word tables of data, and according to the target control word descrambler is arranged, and descrambles target program
Program data stream, realizes that zapping descrambles.
Embodiment three
Fig. 3 is refer to, it is the stream of the optional embodiment of the generation control word tables of data that the embodiment of the present invention three is provided
Journey schematic diagram.The present embodiment is on the basis of above-mentioned any embodiment, it is further provided generate the optional of control word tables of data
Embodiment.
The optional embodiment of the generation control word tables of data that this enforcement is provided, can include as follows before above-mentioned S110
Step：
S310：The transport stream that service front-end sends is received, Program Map Table PMT is obtained from transport stream and is parsed, obtained
Package identifier PID corresponding with ECM packets.
Exemplary, when transport stream is sent, the ECM packets in transport stream are with the following first setting lattice for server front end
Formula is transmitted.
S320：Filter is arranged according to filtration parameter and PID, ECM packets are obtained with filter transport stream, wherein, ECM numbers
According to bag according to the first setting form storage.
Preferably, the first setting form is specially with the spaced the description below enumerated of blank character：Order header, section
The information of mesh 1, the ECM data of program 1, the information of program 2, the ECM data ... ... of program 2, program n information, the ECM numbers of program n
According to, wherein, n is number of programs.
S330：ECM packets are transferred to into smart card.
S340：The control digital packets that smart card determines according to the first of ECM packets the setting format analysis are received, its
In, it is stored with programme information and control word and corresponding relation according to the second setting form in control digital packets.
Preferably, the second setting form is specially with the spaced the description below enumerated of blank character：Order header, section
The information of mesh 1, the CW/ improper values of program 1, the information of program 2, the CW/ improper values ... ... of program 2, program n information, the CW/ of program n
Improper value.When certain program is unable to return control word CW and returns improper value, illustrate that the program cannot descramble, user cannot see
See the program.
It should be noted that server front end is to the transmission of Set Top Box ECM packets, the ECM data of Set Top Box to smart card
Bag transmission is transmitted with the first setting form, and the control digital packets transmission for intelligently snapping into Set Top Box is with the second setting lattice
Formula is transmitted, i.e., server front end, between Set Top Box and smart card by agreement form carry out data transmission.
Because service front-end and Set Top Box are to set format transmission ECM packets, therefore smart card energy by the first of agreement
The ECM data of each program in the ECM packets are identified, meanwhile, smart card is by the second setting format transmission control of agreement
Digital packets, Set Top Box can also recognize the control word of each program in the control digital packets.Therefore, in the filter operation of S320
In, Set Top Box need to only arrange a filter and filter acquisition portion ECM packets, and this causes what the method for this enforcement took
Hardware resource is few；Meanwhile, in the smart card communication operation of S330 and S340, only need to transmit mutually between Set Top Box and smart card
One secondary data, i.e. Set Top Box to smart card only needs transmission primaries ECM packets, smart card only need to return once to Set Top Box
Control digital packets, this is caused in the method for this enforcement, and smart card communication time is short, and the hardware resource of occupancy is few.The present embodiment
In technical scheme, compared to existing technology in quick descrambling scheme, need that the filter for using is less, smart card communication time is more
It is short, therefore the hardware resource for taking is few, can faster descramble target program, realizes fast channel switching.
S350：The control word of each program is obtained according to the programme information of each program and control word tables of data is generated.
Exemplary, according to the programme information of each program, can extract from control digital packets corresponding with each program
Control word, according to the programme information and corresponding control word of each program control word tables of data is generated.
Preferably, it is to realize that target program can continue after zapping success on the basis of embodiment one or embodiment two
Play, in addition it is also necessary to persistently descramble target program.Therefore, after zapping success, terminal also performs following operation (not shown)：
In the playing process of target program, return every preset time period and perform above-mentioned S250 renewals control digital data
The operation of bag, and descrambler is arranged according to the target control word after renewal descrambled, until receiving shutdown command or again
Receive zapping instruction.Wherein, preset time period can be that the ECM data of 10 seconds, i.e. program and control word changed per 10 seconds
Once, in other embodiments, preset time period can also be 5 seconds or other values, and here is not limited.
To sum up, in the technical program, data are carried out by agreement form between server front end, Set Top Box and smart card and is led to
Letter, the same Jing of terminal obtains the PMT of target program, parsing PMT, filters the operation such as ECM packets and smart card communication, and existing
The quick descrambling scheme of technology is compared, and the required filter for using is less, and smart card communication time is shorter, the hardware resource of occupancy
Less, therefore quick descrambling, fast channel switching can be more quickly realized.
It is below the embodiment of the device for realizing DTV fast channel switching provided in an embodiment of the present invention, realizes numeral electricity
Device depending on fast channel switching belongs to same inventive concept with the above-mentioned method for realizing DTV fast channel switching, is realizing numeral
The detail content of not detailed description in the embodiment of the device of automatically switching TV-set, refer to and above-mentioned realize the fast quick change of DTV
The embodiment of the method for platform.
Example IV
Fig. 4 is refer to, it is a kind of frame of device for realizing DTV fast channel switching that the embodiment of the present invention four is provided
Structure schematic diagram.
The device for realizing DTV fast channel switching of the present embodiment, can include following content：
Zapping instruction receiver module 410, for the zapping instruction for switching to target program of receiving user's input.
Target control word enquiry module 420, for inquiring about target program in the control word tables of data that stores in Set Top Box
Target control word.
First descrambling playing module 430, for if there is target control word, then being arranged according to target control word and being descrambled
Device, pushes to the target program data stream of Set Top Box and plays out to descramble service front-end.
To sum up, in the technical program, the zapping instruction for switching to target program of terminal receiving user's input, on machine top
The target control word of the target program is inquired about in the control word tables of data of box storage, if there is the target control word, then
Descrambler is arranged according to the target control word, the target program data stream of Set Top Box is pushed to and is carried out to descramble service front-end
Play.Terminal by the control word tables of data that stores in inquiry Set Top Box, when there is target program in the control word tables of data
During target control word, descrambler descrambles target program can be arranged according to the target control word, switch to target program, be realized quick
Zapping descrambles.
Embodiment five
Fig. 5 is refer to, it is a kind of frame of device for realizing DTV fast channel switching that the embodiment of the present invention five is provided
Structure schematic diagram.The present embodiment is differred primarily in that with example IV, increased on the basis of example IV when control number of words
During according to the target control word that there is no target program in table, the also included multiple functions of device of DTV fast channel switching are realized
Module.
In the present embodiment, when there is no the target control word of target program in control word tables of data, DTV is realized
The device of fast channel switching can also include following content based on the basis of example IV：
Handover request sending module 510, for if there is no target control word, then sending target program to service front-end
Handover request.
PMT parsing modules 520, for receiving the transport stream of service front-end transmission, obtain target program from transport stream
Program Map Table PMT is simultaneously parsed, and obtains package identifier PID corresponding with Entitlement Control Message ECM packets.
ECM packet filtering modules 530, for arranging filter according to filtration parameter and PID, with filter transport stream acquisition
ECM packets.
Smart card communication module 540, for EMC packets to be transferred to into smart card, and obtains smart card according to EMC data
The target control word that Packet analyzing determines.
Control word tables of data update module 550, for target control word to be updated in control word tables of data.
Second descrambling playing module 560, for arranging descrambler according to target control word, is pushed to descrambling service front-end
The target program data stream of Set Top Box is simultaneously played out.
Preferably, ECM packets include the ECM data of all programs under current frequency.
Preferably, ECM packets include current frequency under and adjacent frequency under all programs ECM data.
To sum up, in the technical program, when the target control word that there is no target program in Set Top Box control word tables of data
When, terminal Jing obtains the PMT of target program, parsing PMT, filters the operation such as ECM packets and smart card communication, obtains target section
Purpose target control word is simultaneously updated to control word tables of data, and according to the target control word descrambler is arranged, and descrambles target program
Program data stream, realizes that zapping descrambles.
Embodiment six
Fig. 6 is refer to, it is the optional embodiment party of the control word tables of data generation module 610 that the embodiment of the present invention six is provided
The configuration diagram of formula.The present embodiment further increases control word tables of data on the basis of example IV or embodiment five
Generation module 610, and further provide the optional embodiment of control word tables of data generation module 610.
The device for realizing DTV fast channel switching of the present embodiment, also includes：
Control word tables of data generation module 610, for generating control word tables of data.
Cycle descrambling module (not shown), in the playing process of target program, returning every preset time period
Above-mentioned control word tables of data generation module 610 is performed, and the descrambler is arranged according to the target control word after renewal and solved
Disturb, until receiving shutdown command or receiving zapping instruction again.
Optionally, control word tables of data generation module 610, can include following content：
PMT resolution units 611, for receiving the transport stream of service front-end transmission, obtain Program Map Table from transport stream
PMT is simultaneously parsed, and obtains package identifier PID corresponding with ECM packets.
ECM Packet Filterings unit 612, for arranging filter according to filtration parameter and PID, with filter transport stream acquisition
ECM packets, wherein, ECM packets are according to the first setting form storage.
ECM packets transmitting element 613, for ECM packets to be transferred to into smart card.
Control digital packets receiving unit 614, for receiving smart card according to the first of ECM packets the setting format analysis
It is determined that control digital packets, wherein, be stored with programme information and control word according to the second setting form in control digital packets
And corresponding relation.
Control word tables of data signal generating unit 615, each section is obtained for control word tables of data according to the programme information of each program
Purpose control word simultaneously generates control word tables of data.
To sum up, in the technical program, data are carried out by agreement form between server front end, Set Top Box and smart card and is led to
Letter, the same Jing of terminal obtains the PMT of target program, parsing PMT, filters the operation such as ECM packets and smart card communication, and existing
The quick descrambling scheme of technology is compared, and the required filter for using is less, and smart card communication time is shorter, the hardware resource of occupancy
Less, therefore quick descrambling, fast channel switching can be more quickly realized.
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 the present invention is carried out 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
More other Equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (14)
1. a kind of method for realizing DTV fast channel switching, it is characterised in that methods described includes：
The zapping instruction for switching to target program of receiving user's input；
The target control word of the target program is inquired about in the control word tables of data of Set Top Box storage；
If there is the target control word, then descrambler is arranged according to the target control word, to descramble service front-end push
To Set Top Box target program data stream and play out.
2. the method for claim 1, it is characterised in that described to inquire about institute in the control word tables of data of Set Top Box storage
After stating the target control word of target program, also include：
If there is no the target control word, then the handover request of target program is sent to the service front-end；
The transport stream that the service front-end sends is received, the Program Map Table of the target program is obtained from the transport stream
PMT is simultaneously parsed, and obtains package identifier PID corresponding with Entitlement Control Message ECM packets；
Filter is arranged according to filtration parameter and the PID, to filter the transport stream ECM packets are obtained；
The EMC packets are transferred to into smart card, and obtain the target control that smart card determines according to the EMC resolve packets
Word processed；
The target control word is updated in the control word tables of data；
Descrambler is arranged according to the target control word, to descramble target program data stream that service front-end pushes to Set Top Box simultaneously
Play out.
3. the method for claim 1, it is characterised in that the zapping for switching to target program of the receiving user's input
Before instruction, also include：
The transport stream that service front-end sends is received, Program Map Table PMT is obtained from the transport stream and is parsed, obtained and ECM
Corresponding package identifier PID of packet；
Filter is arranged according to filtration parameter and the PID, to filter the transport stream ECM packets are obtained, wherein, institute
ECM packets are stated according to the first setting form storage；
The ECM packets are transferred to into smart card；
The control digital packets that the smart card determines according to the first of the ECM packets the setting format analysis are received, wherein,
It is stored with programme information and control word and corresponding relation according to the second setting form in the control digital packets；
The control word of each program is obtained according to the programme information of each program and the control word tables of data is generated.
4. method as claimed in claim 3, it is characterised in that：
The first setting form is specially with the spaced the description below enumerated of blank character：Order header, program 1 is believed
Breath, the ECM data of program 1, the information of program 2, the ECM data ... ... of program 2, program n information, the ECM data of program n, its
In, n is number of programs；
The second setting form is specially with the spaced the description below enumerated of blank character：Order header, program 1 is believed
Breath, the CW/ improper values of program 1, the information of program 2, the CW/ improper values ... ... of program 2, program n information, the CW/ mistakes of program n
Value.
5. method as claimed in claim 3, it is characterised in that also include：
In the playing process of target program, return every preset time period and perform the operation for updating control digital packets, and
The descrambler is arranged according to the target control word after renewal to be descrambled, until receive shutdown command or receive again changing
Platform is instructed.
6. the method as described in any one of claim 2-5, it is characterised in that the ECM packets include institute under current frequency
There are the ECM data of program.
7. the method as described in any one of claim 2-5, it is characterised in that the ECM packets include under current frequency and
The ECM data of all programs under adjacent frequency.
8. a kind of device for realizing DTV fast channel switching, it is characterised in that described device includes：
Zapping instruction receiver module, for the zapping instruction for switching to target program of receiving user's input；
Target control word enquiry module, for inquiring about the target of the target program in the control word tables of data that stores in Set Top Box
Control word；
First descrambling playing module, for if there is the target control word, then being arranged according to the target control word and being descrambled
Device, pushes to the target program data stream of Set Top Box and plays out to descramble service front-end.
9. device as claimed in claim 8, it is characterised in that described device also includes：
Handover request sending module, for if there is no the target control word, then sending target section to the service front-end
Purpose handover request；
PMT parsing modules, for receiving the transport stream that the service front-end sends, obtain the target section from the transport stream
Purpose Program Map Table PMT is simultaneously parsed, and obtains package identifier PID corresponding with Entitlement Control Message ECM packets；
ECM packet filtering modules, for arranging filter according to filtration parameter and the PID, are obtained with filtering the transport stream
Obtain the ECM packets；
Smart card communication module, for the EMC packets to be transferred to into smart card, and obtains smart card according to the EMC numbers
According to the target control word that Packet analyzing determines；
Control word tables of data update module, for the target control word to be updated in the control word tables of data；
Second descrambling playing module, for arranging descrambler according to the target control word, to descramble service front-end machine is pushed to
The target program data stream of top box is simultaneously played out.
10. device as claimed in claim 8, it is characterised in that described device also includes control word tables of data generation module, uses
In the control word tables of data is generated, the control word tables of data generation module includes：
PMT resolution units, for receiving the transport stream of service front-end transmission, obtain Program Map Table PMT from the transport stream
And parse, obtain package identifier PID corresponding with ECM packets；
ECM Packet Filtering units, for arranging filter according to filtration parameter and the PID, are obtained with filtering the transport stream
The ECM packets are obtained, wherein, the ECM packets are according to the first setting form storage；
ECM packet transmitting elements, for the ECM packets to be transferred to into smart card；
Control digital packets receiving unit, for receiving the smart card according to the first of the ECM packets the setting form solution
Analysis determine control digital packets, wherein, it is described control digital packets according to second setting form be stored with programme information and
Control word and corresponding relation；
Control word tables of data signal generating unit, for the control that control word tables of data obtains each program according to the programme information of each program
Word simultaneously generates the control word tables of data.
11. devices as claimed in claim 10, it is characterised in that：
The first setting form is specially with the spaced the description below enumerated of blank character：Order header, program 1 is believed
Breath, the ECM data of program 1, the information of program 2, the ECM data ... ... of program 2, program n information, the ECM data of program n, its
In, n is number of programs；
The second setting form is specially with the spaced the description below enumerated of blank character：Order header, program 1 is believed
Breath, the CW/ improper values of program 1, the information of program 2, the CW/ improper values ... ... of program 2, program n information, the CW/ mistakes of program n
Value.
12. devices as claimed in claim 10, it is characterised in that described device also includes：
Cycle descrambling module, in the playing process of target program, returning every preset time period and performing the control
Digital data table generation module, and descrambled according to the target control word setting descrambler after renewal, until receiving pass
Machine instructs or receives again zapping instruction.
13. devices as described in any one of claim 9-12, it is characterised in that the ECM packets are included under current frequency
The ECM data of all programs.
14. devices as described in any one of claim 9-12, it is characterised in that the ECM packets are included under current frequency
And under adjacent frequency all programs ECM data.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611073575.1A CN106658151A (en) | 2016-11-29 | 2016-11-29 | Method and device for rapidly changing station of digital television |
| PCT/CN2017/112894 WO2018099331A1 (en) | 2016-11-29 | 2017-11-24 | Method and apparatus for switching digital television channels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611073575.1A CN106658151A (en) | 2016-11-29 | 2016-11-29 | Method and device for rapidly changing station of digital television |
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| CN106658151A true CN106658151A (en) | 2017-05-10 |
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ID=58814065
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| CN201611073575.1A Pending CN106658151A (en) | 2016-11-29 | 2016-11-29 | Method and device for rapidly changing station of digital television |
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| Country | Link |
|---|---|
| CN (1) | CN106658151A (en) |
| WO (1) | WO2018099331A1 (en) |
Cited By (4)
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| WO2018099331A1 (en) * | 2016-11-29 | 2018-06-07 | 深圳创维数字技术有限公司 | Method and apparatus for switching digital television channels |
| 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 |
| 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 |
| CN109413491A (en) * | 2018-11-16 | 2019-03-01 | 青岛海信电器股份有限公司 | A kind of method and device of the descrambling audio, video data for reducing bandwidth |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115412770A (en) * | 2022-08-30 | 2022-11-29 | 京东方科技集团股份有限公司 | Instruction message processing method and device, storage medium and electronic equipment |
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| WO2018099331A1 (en) * | 2016-11-29 | 2018-06-07 | 深圳创维数字技术有限公司 | Method and apparatus for switching digital television channels |
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| 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 |
| CN109413491A (en) * | 2018-11-16 | 2019-03-01 | 青岛海信电器股份有限公司 | A kind of method and device of the descrambling audio, video data for reducing bandwidth |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018099331A1 (en) | 2018-06-07 |
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Application publication date: 20170510 |