CN103686214A - Methods for encrypting television programs and playing encrypted television programs, front end and terminal - Google Patents
Methods for encrypting television programs and playing encrypted television programs, front end and terminal Download PDFInfo
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Abstract
The invention discloses a method for encrypting television programs. The method comprises the following steps: extracting corresponding program information and frequency point information of each television program; encrypting the program information, the frequency point information and corresponding index values of the program information and the frequency point information; generating a data packet by using the encrypted program information, frequency point information and index values, and adding the data packet into TS (Transport Stream) by using a predetermined packet identification code for transmitting. The invention further discloses a method for playing encrypted television programs, a front end and a terminal. The encryption and decryption processes of encrypted television programs can be simplified, and the cost is reduced.
Description
Technical field
The present invention relates to digital TV field, relate in particular to scrambled TV service program was encrypted and play to a kind of TV programme method, front end and terminal.
Background technology
Along with the development of digital television techniques and perfect, the service providing and function are more and more.Traditional scrambled TV service program carries out specific scrambling processing before front end sends TV signal, at receiving terminal access decoder, after also will paying, could normally watch before the deadline.The encryption system adopting both at home and abroad at present has multiple, can be encrypted respectively video and audio signal.As to video PES(Packetized Elementary Streams, the elementary stream of packing) stream is all encrypted with audio frequency PES stream, when terminal plays ciphered program, the audio/video flow of encryption constantly need to be decrypted, then could play.This mode that TV programme is encrypted and deciphered, need more relevant hardware or software or software and hardware combining support can guarantee carrying out smoothly of deciphering, and require the process of deciphering continual and steady, the process of deciphering is slower, cost is higher, and the flow process very complicated of encryption and decryption.
Foregoing only, for auxiliary understanding technical scheme of the present invention, does not represent and admits that foregoing is prior art.
Summary of the invention
Main purpose of the present invention is to provide a kind of TV programme to encrypt and play method, front end and the terminal of scrambled TV service program, is intended to simplify the encryption and decryption process of scrambled TV service program, reduces costs.
For achieving the above object, the invention provides the method that TV programme is encrypted, comprise the following steps:
Extract programme information corresponding to each TV programme and frequency point information;
Described programme information, frequency point information and the index value corresponding with described programme information, frequency point information are encrypted;
By programme information, frequency point information and index value generated data bag after encrypting, to be scheduled to wrapping identification code, described packet is added in TS stream and transmitted.
Preferably, the described step that described programme information, frequency point information and the index value corresponding with described programme information, frequency point information are encrypted comprises:
Take programme information corresponding to each TV programme, frequency point information is encrypted as a data group;
For the data group after each encryption, add index value, the data group by described index value and after encrypting is encrypted.
The present invention also provides a kind of method of playing scrambled TV service program, comprises the following steps:
When described scrambled TV service program has been authorized broadcasting, according to predetermined bag identification code, from described TS stream, load packet corresponding to described scrambled TV service program;
To described packet deciphering, obtain programme information, frequency point information and corresponding index value;
The rendition list generating with program number and program combination by name according to described programme information, frequency point information and corresponding index value also shows;
After selecting described program number, according to described program number, obtain corresponding index value, and obtain described frequency point information and programme information according to described index value, to play described scrambled TV service program.
Preferably, described to packet deciphering, the step that obtains the index value of described programme information, frequency point information and correspondence comprises:
To described packet deciphering, obtain data group and the corresponding index value encrypted;
Data group deciphering to described encryption, obtains described programme information and frequency point information.
Preferably, the described step also showing with program number and program the rendition list combining by name according to described programme information, frequency point information and corresponding index value generation comprises:
According to described index value, generate program number, according to described programme information, frequency point information, generate program names;
Integrating described program number and program names generates described the rendition list and shows.
The present invention also provides a kind of front end, comprising:
Extraction module, for extracting programme information corresponding to each TV programme and frequency point information;
Encrypting module, for being encrypted described programme information, frequency point information and the index value corresponding with described programme information, frequency point information;
Transport module, for by programme information, frequency point information and index value generated data bag after encrypting, adds described packet in TS stream and transmits to be scheduled to wrapping identification code.
Preferably, described encrypting module comprises:
The first ciphering unit, is encrypted as a data group for take programme information corresponding to each TV programme, frequency point information;
The second ciphering unit, is used to the data group after each encryption to add index value, and the data group by described index value and after encrypting is encrypted.
The present invention also provides a kind of terminal, comprising:
Load-on module while playing for having authorized when described scrambled TV service program, loads packet corresponding to described scrambled TV service program according to predetermined bag identification code from described TS stream;
Deciphering module, for to described packet deciphering, obtains programme information, frequency point information and corresponding index value;
Display module, also shows for the rendition list generating with program number and program combination by name according to described programme information, frequency point information and corresponding index value;
Acquisition module, for after selecting described program number, obtains corresponding index value according to described program number, and obtains described frequency point information and programme information according to described index value, to play described scrambled TV service program.
Preferably, described deciphering module comprises:
The first decryption unit, for to described packet deciphering, obtains data group and the corresponding index value encrypted;
The second decryption unit, the data group deciphering for to described encryption, obtains described programme information and frequency point information.
Preferably, described display module comprises:
Acquiring unit, for generating program number according to described index value, generates program names according to described programme information, frequency point information;
Display unit, generates described the rendition list and shows for integrating described program number and program names.
The present invention is by extracting corresponding programme information and the frequency point information of each TV programme, and programme information and the frequency point information of adding after index value are encrypted, than mode video flowing and audio stream being all encrypted in prior art, simplify the content of encrypting, and can simplify encryption flow; While transmitting, add predetermined Packet Identifier in TS stream, the packet that makes terminal can directly load the predetermined bag of TS stream identification code when playing is decrypted, do not need to decipher continuously, use method of the present invention also not need the support of too much software or hardware to realize, cost is lower.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of method one embodiment of TV programme encryption of the present invention;
Fig. 2 is the refinement schematic flow sheet of the step that in Fig. 1, programme information, frequency point information and index value is encrypted;
Fig. 3 is the schematic flow sheet that the present invention plays method one embodiment of scrambled TV service program;
Fig. 4 is the refinement schematic flow sheet to the step of packet deciphering in Fig. 3;
Fig. 5 is the refinement schematic flow sheet that generates the step of the rendition list demonstration in Fig. 3;
Fig. 6 is the structural representation of front end one embodiment of the present invention;
Fig. 7 is the structural representation of encrypting module shown in Fig. 6;
Fig. 8 is the structural representation of terminal one embodiment of the present invention;
Fig. 9 is the structural representation of deciphering module shown in Fig. 8;
Figure 10 is the structural representation of display module shown in Fig. 8.
The realization of the object of the invention, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of method that TV programme is encrypted, consult Fig. 1, in one embodiment, the method that this TV programme is encrypted comprises the following steps:
Step S101, extracts programme information corresponding to each TV programme and frequency point information;
Front end extracts programme information corresponding to each TV programme and frequency point information, and programme information comprises video type and video packets identification code, audio types and audio pack identification code etc.Such as extracting the audio, video datas such as video type (Audio_type), video packets identification code (Audio_PID), audio types (Video_type), audio pack identification code (Video_PID), PRC_PID of transmission in the stream type (stream_type) that is originally placed on Program Map Table and element bag identification code (elementary_PID) and programm name etc.
Frequency point information is mainly the parameter of transmission in satellite transmission system (satellite delivery system descriptor), comprises frequency (Frequency), orbital position (Orbital_position), track thing sign (West_east_flag), forward error correction ISN (FEC_inner), polarization mode (Polarization), modulating system (Modulation_system), modulation system (Modulation_type) and symbol rate (Symbol_rate) etc.
Step S102, is encrypted described programme information, frequency point information and the index value corresponding with described programme information, frequency point information;
In the present embodiment, index value is self-defined interpolation, only for identifying different TV programme.The corresponding index value of the programme information of each TV programme and frequency point information.
Wherein, programme information, frequency point information and the index value corresponding with programme information, frequency point information being encrypted to adopted cryptographic algorithm does not limit.
Front end is only encrypted programme information, frequency point information and corresponding index value, than mode video flowing and audio stream being all encrypted in prior art, has simplified the content of encryption, and can simplify encryption flow.
Step S103, by programme information, frequency point information and index value generated data bag after encrypting, adds described packet in TS stream and transmits to be scheduled to wrapping identification code.
Wherein, predetermined bag identification code is that front end and terminal are known, terminal can load the packet of the predetermined bag of TS stream identification code as required.
After programme information, frequency point information and corresponding index value are encrypted, by the programme information after encrypting, frequency point information and corresponding index value generated data bag, particularly, front end can be packaged into it packet of 188 bytes by TS flow standard form, and can be with SI(Service Information information on services) universal standard CAT(Conditional Access Table, CAT Conditional Access Table) mode is specified bag identification code, the predetermined bag identification code of usining as the present embodiment, and add in TS stream and transmit adding packet after bag identification code.
The present embodiment is by extracting corresponding programme information and the frequency point information of each TV programme, and programme information and the frequency point information of adding after index value are encrypted, than mode video flowing and audio stream being all encrypted in prior art, simplify the content of encrypting, and can simplify encryption flow; While transmitting, add predetermined Packet Identifier in TS stream, the packet that makes terminal can directly load the predetermined bag of TS stream identification code when playing is decrypted, do not need to decipher continuously, use the method for the present embodiment, also do not need the support of too much software or hardware to realize, cost is lower.
In a preferred embodiment, as shown in Figure 2, the step in above-mentioned steps S102, described programme information, frequency point information and the index value corresponding with described programme information, frequency point information being encrypted comprises:
Step S1021, take programme information corresponding to each TV programme, frequency point information to be encrypted as a data group;
Step S1022, adds index value for the data group after each encryption, and the data group by described index value and after encrypting is encrypted.
The present embodiment first be take programme information corresponding to each TV programme, frequency point information as a data group is encrypted, and in order to improve fail safe, after the data group interpolation index value after encryption, then data group and the index value after encrypting is encrypted.As mentioned above, the cryptographic algorithm that this twice encryption adopts does not all limit.
As shown in Figure 3, the invention provides a kind of method of playing scrambled TV service program, the method for this broadcasting scrambled TV service program comprises the following steps:
Step S201 when described scrambled TV service program has been authorized broadcasting, loads packet corresponding to described scrambled TV service program according to predetermined bag identification code from described TS stream;
Before playing scrambled TV service program, detect whether authorization terminal is play scrambled TV service program, when scrambled TV service program has been authorized broadcasting, because terminal can be determined corresponding predetermined bag identification code according to scrambled TV service program, therefore do not need can from TS stream, load the packet that scrambled TV service program is corresponding through tuning.For example, predetermined bag identification code is 0xFE, from TS stream, loads the packet that 0xFE is corresponding.
Step S202, to described packet deciphering, obtains programme information, frequency point information and corresponding index value;
When loading after the packet that scrambled TV service program is corresponding from TS stream, this packet is decrypted, to obtain scrambled TV service program, play necessary programme information, frequency point information and corresponding index value.Decipherment algorithm is corresponding with aforesaid cryptographic algorithm, is the inverse process of cryptographic algorithm.
Packet corresponding to scrambled TV service program that terminal only needs deciphering to play can be realized the broadcasting of scrambled TV service program, in prior art, need video flowing and audio stream to decipher continuously, the manner of decryption of the present embodiment is simpler, simplifies the flow process of deciphering.
Step S203, the rendition list generating with program number and program combination by name according to described programme information, frequency point information and corresponding index value also shows;
After obtaining the index value of programme information, frequency point information and correspondence, in order to make scrambled TV service program have an information demonstration more intuitively, to facilitate terminal use's selection, can generate the rendition list according to programme information, frequency point information and corresponding index value, the rendition list comprises program number and program names, as the rendition list is: program 1:CCTV1, program 2:CCTV2, program 3:CCTV3 etc.Wherein this program number is corresponding with index value, and program names can obtain according to programme information and frequency point information.
Step S204, after selecting described program number, obtains corresponding index value according to described program number, and obtains described frequency point information and programme information according to described index value, to play described scrambled TV service program.
When terminal use selects after a certain program number, according to this program number, obtain corresponding index value, and obtain frequency point information and programme information according to index value, obtain after frequency point information and programme information, complete the frequency locking of scrambled TV service program, further can play scrambled TV service program.
In a preferred embodiment, as shown in Figure 4, on basis embodiment illustrated in fig. 3, above-mentioned steps S202 deciphers packet, and the step that obtains the index value of described programme information, frequency point information and correspondence comprises:
Step S2021, to described packet deciphering, obtains data group and the corresponding index value encrypted;
Step S2022, the data group deciphering to described encryption, obtains described programme information and frequency point information.
Wherein, corresponding with aforementioned cryptographic algorithm, when enabling decryption of encrypted TV programme, first to packet, deciphering obtains data group and the corresponding index value encrypted, then the data group of encrypting is decoded and obtained programme information and frequency point information.
As shown in Figure 5, on basis embodiment illustrated in fig. 3, above-mentioned steps S203 generates with the rendition list of program number and program combination by name the step showing and comprises according to described programme information, frequency point information and corresponding index value:
Step S2031, generates program number according to described index value, according to described programme information, frequency point information, generates program names;
Step S2032, integrates described program number and program names and generates described the rendition list and show.
The present embodiment loads the packet that scrambled TV service program is corresponding by predetermined bag identification code from TS stream, described packet is decrypted to programme information required can obtain playing time, frequency point information and corresponding index value, packet corresponding to scrambled TV service program that only needs deciphering to play can be realized the broadcasting of scrambled TV service program, in prior art, need video flowing and audio stream to decipher continuously, the manner of decryption of the present embodiment is simpler, simplify the flow process of deciphering, do not need the support of too much software or hardware to realize yet, cost is lower.
As shown in Figure 6, the invention provides a kind of front end, comprising:
The extraction module 101 of front end extracts corresponding programme information and the frequency point information of each TV programme, and programme information comprises video type and video packets identification code, audio types and audio pack identification code etc.Such as extracting the audio, video datas such as video type (Audio_type), video packets identification code (Audio_PID), audio types (Video_type), audio pack identification code (Video_PID), PRC_PID of transmission in the stream type (stream_type) that is originally placed on Program Map Table and element bag identification code (elementary_PID) and programm name etc.
Frequency point information is mainly the parameter of transmission in satellite transmission system (satellite delivery system descriptor), comprises frequency (Frequency), orbital position (Orbital_position), track thing sign (West_east_flag), forward error correction ISN (FEC_inner), polarization mode (Polarization), modulating system (Modulation_system), modulation system (Modulation_type) and symbol rate (Symbol_rate) etc.
Encrypting module 102, for being encrypted described programme information, frequency point information and the index value corresponding with described programme information, frequency point information;
In the present embodiment, index value is self-defined interpolation, only for identifying different TV programme.The corresponding index value of the programme information of each TV programme and frequency point information.
Wherein, 102 pairs of programme informations of encrypting module, frequency point information and the index value corresponding with programme information, frequency point information are encrypted adopted cryptographic algorithm and do not limit.
The encrypting module 102 of front end is only encrypted programme information, frequency point information and corresponding index value, than mode video flowing and audio stream being all encrypted in prior art, has simplified the content of encryption, and can simplify encryption flow.
Wherein, predetermined bag identification code is that front end and terminal are known, terminal can load the packet of the predetermined bag of TS stream identification code as required.
After programme information, frequency point information and corresponding index value are encrypted, by the programme information after encrypting, frequency point information and corresponding index value generated data bag, particularly, it can be packaged into the packet of 188 bytes by TS flow standard form, and can be with SI(Service Information information on services) universal standard CAT(Conditional Access Table, CAT Conditional Access Table) mode is specified bag identification code, the predetermined bag identification code of usining as the present embodiment, and add in TS stream and transmit adding packet after bag identification code.
In a preferred embodiment, as shown in Figure 7, above-mentioned encrypting module 102 comprises:
The first ciphering unit 1021, is encrypted as a data group for take programme information corresponding to each TV programme, frequency point information;
The second ciphering unit 1022, is used to the data group after each encryption to add index value, and the data group by described index value and after encrypting is encrypted.
The present embodiment the first ciphering unit 1021 be take programme information corresponding to each TV programme, frequency point information and is encrypted as a data group, in order to improve fail safe, data group after encryption is added after index value, and the second ciphering unit 1022 is encrypted data group and index value after encrypting again.As mentioned above, the cryptographic algorithm that this twice encryption adopts does not all limit.
As shown in Figure 8, the invention provides a kind of terminal, comprising:
Load-on module 201 while playing for having authorized when described scrambled TV service program, loads packet corresponding to described scrambled TV service program according to predetermined bag identification code from described TS stream;
Before playing scrambled TV service program, detect whether authorization terminal is play scrambled TV service program, when scrambled TV service program has been authorized broadcasting, because terminal can be determined corresponding predetermined bag identification code according to scrambled TV service program, therefore do not need can from TS stream, load the packet that scrambled TV service program is corresponding through tuning.For example, predetermined bag identification code is 0xFE, from TS stream, loads the packet that 0xFE is corresponding.
Deciphering module 202, for to described packet deciphering, obtains programme information, frequency point information and corresponding index value;
When load-on module 201 loads after the packet that scrambled TV service program is corresponding from TS stream, 202 pairs of these packets of deciphering module are decrypted, and to obtain scrambled TV service program, play necessary programme information, frequency point information and corresponding index value.Decipherment algorithm is corresponding with aforesaid cryptographic algorithm, is the inverse process of cryptographic algorithm.
Packet corresponding to scrambled TV service program that deciphering module 202 only needs deciphering to play can be realized the broadcasting of scrambled TV service program, in prior art, need video flowing and audio stream to decipher continuously, the manner of decryption of the present embodiment is simpler, simplifies the process of deciphering.
After obtaining the index value of programme information, frequency point information and correspondence, in order to make scrambled TV service program have an information demonstration more intuitively, to facilitate terminal use's selection, can generate the rendition list according to programme information, frequency point information and corresponding index value, the rendition list comprises program number and program names, as the rendition list is: program 1:CCTV1, program 2:CCTV2, program 3:CCTV3 etc.Wherein this program number is corresponding with index value, and program names can obtain according to programme information and frequency point information.
When terminal use selects after a certain program number, according to this program number, obtain corresponding index value, and obtain frequency point information and programme information according to index value, obtain after frequency point information and programme information, complete the frequency locking of scrambled TV service program, further can play scrambled TV service program.
In a preferred embodiment, as shown in Figure 9, above-mentioned deciphering module 202 comprises:
The first decryption unit 2021, for to described packet deciphering, obtains data group and the corresponding index value encrypted;
The second decryption unit 2022, the data group deciphering for to described encryption, obtains described programme information and frequency point information.
Wherein, corresponding with aforementioned cryptographic algorithm, when enabling decryption of encrypted TV programme, first to packet, deciphering obtains data group and the corresponding index value encrypted to the first decryption unit 2021, and the second decryption unit 2022 is decoded and obtained programme information and frequency point information the data group of encrypting again.
In a preferred embodiment, as shown in figure 10, above-mentioned display module 203 comprises:
Acquiring unit 2031, for generating program number according to described index value, generates program names according to described programme information, frequency point information;
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.Through the above description of the embodiments, those skilled in the art can be well understood to the mode that above-described embodiment method can add essential general hardware platform by software and realize, can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprise that some instructions are with so that a station terminal equipment (can be mobile phone, computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
These are only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. the method that TV programme is encrypted, is characterized in that, comprises the following steps:
Extract programme information corresponding to each TV programme and frequency point information;
Described programme information, frequency point information and the index value corresponding with described programme information, frequency point information are encrypted;
By programme information, frequency point information and index value generated data bag after encrypting, to be scheduled to wrapping identification code, described packet is added in TS stream and transmitted.
2. the method for claim 1, is characterized in that, the described step that described programme information, frequency point information and the index value corresponding with described programme information, frequency point information are encrypted comprises:
Take programme information corresponding to each TV programme, frequency point information is encrypted as a data group;
For the data group after each encryption, add index value, the data group by described index value and after encrypting is encrypted.
3. a method of playing scrambled TV service program, is characterized in that, comprises the following steps:
When described scrambled TV service program has been authorized broadcasting, according to predetermined bag identification code, from described TS stream, load packet corresponding to described scrambled TV service program;
To described packet deciphering, obtain programme information, frequency point information and corresponding index value;
The rendition list generating with program number and program combination by name according to described programme information, frequency point information and corresponding index value also shows;
After selecting described program number, according to described program number, obtain corresponding index value, and obtain described frequency point information and programme information according to described index value, to play described scrambled TV service program.
4. method as claimed in claim 3, is characterized in that, described to packet deciphering, the step that obtains the index value of described programme information, frequency point information and correspondence comprises:
To described packet deciphering, obtain data group and the corresponding index value encrypted;
Data group deciphering to described encryption, obtains described programme information and frequency point information.
5. method as claimed in claim 3, is characterized in that, the described step also showing with program number and program the rendition list combining by name according to described programme information, frequency point information and corresponding index value generation comprises:
According to described index value, generate program number, according to described programme information, frequency point information, generate program names;
Integrating described program number and program names generates described the rendition list and shows.
6. a front end, is characterized in that, comprising:
Extraction module, for extracting programme information corresponding to each TV programme and frequency point information;
Encrypting module, for being encrypted described programme information, frequency point information and the index value corresponding with described programme information, frequency point information;
Transport module, for by programme information, frequency point information and index value generated data bag after encrypting, adds described packet in TS stream and transmits to be scheduled to wrapping identification code.
7. front end as claimed in claim 6, is characterized in that, described encrypting module comprises:
The first ciphering unit, is encrypted as a data group for take programme information corresponding to each TV programme, frequency point information;
The second ciphering unit, is used to the data group after each encryption to add index value, and the data group by described index value and after encrypting is encrypted.
8. a terminal, is characterized in that, comprising:
Load-on module while playing for having authorized when described scrambled TV service program, loads packet corresponding to described scrambled TV service program according to predetermined bag identification code from described TS stream;
Deciphering module, for to described packet deciphering, obtains programme information, frequency point information and corresponding index value;
Display module, also shows for the rendition list generating with program number and program combination by name according to described programme information, frequency point information and corresponding index value;
Acquisition module, for after selecting described program number, obtains corresponding index value according to described program number, and obtains described frequency point information and programme information according to described index value, to play described scrambled TV service program.
9. terminal as claimed in claim 8, is characterized in that, described deciphering module comprises:
The first decryption unit, for to described packet deciphering, obtains data group and the corresponding index value encrypted;
The second decryption unit, the data group deciphering for to described encryption, obtains described programme information and frequency point information.
10. terminal as claimed in claim 8, is characterized in that, described display module comprises:
Acquiring unit, for generating program number according to described index value, generates program names according to described programme information, frequency point information;
Display unit, generates described the rendition list and shows for integrating described program number and program names.
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| CN109996020A (en) * | 2017-12-29 | 2019-07-09 | 华为技术有限公司 | A kind of video recording method and device |
| CN108650549A (en) * | 2018-05-09 | 2018-10-12 | 深圳市汇星数字技术有限公司 | Digital TV data management method and system |
| CN108650549B (en) * | 2018-05-09 | 2020-10-23 | 深圳市汇星数字技术有限公司 | Digital television data management method and system |
| CN109939436A (en) * | 2019-03-20 | 2019-06-28 | 网易（杭州）网络有限公司 | Game video-recording and playback method, apparatus, computer storage medium and electronic equipment |
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