CN106454488B - A kind of performance recording based on set-top box and back method and system - Google Patents
A kind of performance recording based on set-top box and back method and system Download PDFInfo
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- CN106454488B CN106454488B CN201610879569.9A CN201610879569A CN106454488B CN 106454488 B CN106454488 B CN 106454488B CN 201610879569 A CN201610879569 A CN 201610879569A CN 106454488 B CN106454488 B CN 106454488B
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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
- H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
- H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
-
- 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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
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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
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4627—Rights management associated to the content
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- Engineering & Computer Science (AREA)
- Databases & Information Systems (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Storage Device Security (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The invention discloses a kind of performance recordings based on set-top box and back method and system, method includes: when the recording request for detecting program, judge whether program is scrambled program, if scrambled program, it then obtains the smart card having permission to descramble program, and secondary encryption is carried out to recorded file according to descriptor and is stored；If unscrambled program, then encryption storage is carried out to recorded file using universal key；After the playback request for detecting recorded file instructs, judges whether it is scrambled program, if scrambled program, then obtain the smart card having permission and program is descrambled, playback is decrypted to recorded file according to the descriptor of program；If not then playback is decrypted to recorded file using universal key in scrambled program.The present invention can carry out secondary encryption to recorded file, and while guaranteeing to record the safety of program, other have the set-top box of the programme rights that can also play back the recorded file, provide convenience for user's recording and playback program.
Description
Technical field
The present invention relates to set-top box technique field more particularly to a kind of performance recording based on set-top box and back method and
System.
Background technique
The recording function of set-top box is using more more and more universal, due to safety concerns, recorded file be typically necessary it is secondary plus
Close storage, such recorded program can only play on the set-top box, maintenance operation quotient's interests.
Set-top box is commonly hardware ID (such as master chip for utilizing set-top box to the method for the secondary encryption of recorded file at present
ChipID) Key as Encryption Algorithm, recorded file is encrypted and is stored.When playback, hardware ID is first read, with corresponding
Decipherment algorithm is decrypted recorded file and is played back, and encryption is also to be realized by the hardware algorithm of set-top box with decryption.It records in this way
Program, can only be played back on the set-top box.It is not clever enough although scheme effectively maintains the interests of operator in this way
Living, the problem after recording can only be played back in the set-top box, even if other set-top boxes have the permission of the program, can not also play back the record
File processed.Therefore in the prior art after the recorded file Encryption Algorithm encryption of set-top box, recorded program can only be in the machine of encryption
Could be played back on top box, when encryption set-top box when something goes wrong, recorded program just can not play, and user can not also pass through it
He records program at equipment viewing, and watching recorded program for user makes troubles.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
In view of the deficiencies in the prior art, it is an object of that present invention to provide a kind of performance recordings based on set-top box and playback side
Method and system, it is intended to which after the recorded file Encryption Algorithm encryption for solving set-top box in the prior art, recorded program can only add
Could be played back on close set-top box, when encryption set-top box when something goes wrong, recorded program just can not play, and user can not yet
It is watched by other equipment and records program, watch the technical issues of recorded program is made troubles for user.
Technical scheme is as follows:
A kind of performance recording and back method based on set-top box, wherein method includes:
A, the descriptor that program is added in table is described in the program service of set-top box in advance；
B, after the recording request for detecting program instructs, the descriptor of program is obtained, is judged by the descriptor of program
Whether program is scrambled program, if program is scrambled program, obtains the smart card having permission and descrambles to program, and according to
Descriptor carries out secondary encryption to the recorded file generated after performance recording and stores；If program is unscrambled program, using logical
Encryption storage is carried out with the recorded file generated after key pair performance recording；
C, after the playback request for detecting recorded file instructs, the descriptor of program is obtained, the descriptor of program is passed through
Judge whether program is scrambled program, if program is scrambled program, obtains the smart card having permission and program is descrambled, root
Playback is decrypted to recorded file according to the descriptor of program；If program is unscrambled program, using universal key to recording
Playback is decrypted in file.
The performance recording and back method based on set-top box, wherein further comprised the steps of: before the step A
S, program id information is stored in the database of set-top box in advance.
The performance recording and back method based on set-top box, wherein be arranged in the descriptor of the program useful
In the solution that mark program is the scrambling identifier of scrambled program or unscrambled program and the descrambling permission of mark scrambled program
Disturb mark ID.
The performance recording and back method based on set-top box, wherein the step B specifically includes step:
B1, when detect program recording request instruct after, from the database of set-top box obtain program id information, and from
Program service describes the descriptor that program is obtained in table；
B2, judge that program is scrambled program or unscrambled section by the value of the scrambling identifier in the descriptor of program
Mesh；
If B3, program are scrambled program, judge smart card with the presence or absence of descrambling mark ID, and if it exists, then intelligent fixture
There is corresponding permission, smart card descrambles program, saves program id information and scrambling identifier, and identify ID according to descrambling
Secondary encryption storage is carried out to the recorded file generated after performance recording；If it does not exist, then smart card does not have permission, cannot be to section
Mesh is descrambled, performance recording failure；
If B4, program are unscrambled program, the scrambling identifier of program id information and program is saved, and according to general close
Key carries out secondary encryption to the recorded file generated after performance recording and stores.
The performance recording and back method based on set-top box, wherein the step C specifically includes step:
C1, when detect recorded file playback request instruct after, from the database of set-top box obtain program id information,
The descriptor that program is obtained in table is described from program service；
C2, judge that program is scrambled program or unscrambled section by the value of the scrambling identifier in the descriptor of program
Mesh；
If C3, program are scrambled program, judge in smart card with the presence or absence of descrambling mark ID, and if it exists, then smart card
With playback right, smart card descrambles program, according to descrambling mark ID to playing back after recorded file decryption, if not depositing
, then smart card do not have playback right, program cannot be descrambled, programme replay failure；
If C4, program are unscrambled program, according to by being played back after the decryption of key pair recorded file.
A kind of performance recording and playback system based on set-top box, wherein system includes:
Descriptor adding module, for describing the descriptor for adding program in table in the program service of set-top box in advance；
Performance recording module, for obtaining the descriptor of program, passing through section after the recording request for detecting program instructs
Purpose descriptor judges whether program is scrambled program, if program is scrambled program, obtains the smart card having permission to program
Descrambled, and secondary encryption is carried out to the recorded file generated after performance recording according to descriptor and is stored；If program is non-adds
Program is disturbed, then encryption storage is carried out to the recorded file generated after performance recording using universal key；
Programme replay module, for obtaining the descriptor of program, leading to after the playback request for detecting recorded file instructs
Purpose of celebrating a festival descriptor judges whether program is scrambled program, if program is scrambled program, obtains the smart card pair having permission
Program is descrambled, and playback is decrypted to recorded file according to the descriptor of program；If program is unscrambled program, use
Playback is decrypted to recorded file in universal key.
The performance recording and playback system based on set-top box, wherein the system also includes:
Module is stored in advance, for program id information to be stored in the database of set-top box in advance.
The performance recording and playback system based on set-top box, wherein be arranged in the descriptor of the program useful
In the solution that mark program is the scrambling identifier of scrambled program or unscrambled program and the descrambling permission of mark scrambled program
Disturb mark ID.
The performance recording and playback system based on set-top box, wherein the performance recording module specifically includes:
First detection and acquiring unit, for when detect program recording request instruction after, from the database of set-top box
Middle acquisition program id information, and from program service describe in table obtain program descriptor；
First judging unit, the value for the scrambling identifier in the descriptor by program judge that program is scrambled program
Or unscrambled program；
First performance recording unit judges that smart card identifies ID with the presence or absence of descrambling if being scrambled program for program,
If it exists, then smart card has corresponding permission, and smart card descrambles program, saves program id information and scrambling mark
Symbol, and secondary encryption is carried out to the recorded file generated after performance recording according to descrambling mark ID and is stored；If it does not exist, then intelligent
Block no permission, program cannot be descrambled, performance recording failure；
Second program recording elements save the scrambling of program id information and program if being unscrambled program for program
Identifier, and secondary encryption is carried out to the recorded file generated after performance recording according to universal key and is stored.
The performance recording and playback system based on set-top box, wherein the programme replay module specifically includes:
Second detection and acquiring unit, for when detect recorded file playback request instruction after, from the number of set-top box
According to program id information is obtained in library, the descriptor that program is obtained in table is described from program service；
Second judgment unit, the value for the scrambling identifier in the descriptor by program judge that program is scrambled program
Or unscrambled program；
First program playback unit judges in smart card if being scrambled program for program with the presence or absence of descrambling mark
ID, and if it exists, then smart card has playback right, and smart card descrambles program, according to descrambling mark ID to recorded file
It is played back after decryption, if it does not exist, then smart card does not have playback right, cannot descramble to program, programme replay failure；
Second program playback unit, if being unscrambled program for program, basis is decrypted by key pair recorded file
After play back.
The present invention provides a kind of performance recording based on set-top box and back method and system, the present invention can be literary to recording
Part carries out secondary encryption, and while guaranteeing to record the safety of program, other have the set-top box of the programme rights that can also play back
The recorded file provides convenience for user's recording and playback program.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the preferred embodiment of performance recording and back method based on set-top box of the invention.
Fig. 2 is the flow chart of the concrete application embodiment of step S200 in Fig. 1.
Fig. 3 is the flow chart of the concrete application embodiment of step S300 in Fig. 1.
Fig. 4 is a kind of principle of work and power of the preferred embodiment of performance recording and playback system based on set-top box of the invention
Block diagram.
Fig. 5 is the program of concrete application embodiment in a kind of performance recording and playback system based on set-top box of the invention
Record the functional schematic block diagram of module.
Fig. 6 is a kind of program of the concrete application embodiment of performance recording and playback system based on set-top box of the invention
The functional schematic block diagram of playback module.
Specific embodiment
To make the purpose of the present invention, technical solution and effect clearer, clear and definite, below to the present invention further specifically
It is bright.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The flow chart of the preferred embodiment of the present invention provides a kind of performance recording and back method based on set-top box, such as
Shown in Fig. 1, wherein method includes:
Step S100, the descriptor that program is added in table is described in the program service of set-top box in advance.
When it is implemented, front end describes the NASP_CA_ for adding each program in table i.e. SDT table in program service
Descriptor descriptor, be provided in the NASP_CA_descriptor descriptor descriptor of program for identify program be plus
It disturbs the scrambling identifier of program or unscrambled program and identifies the descrambling mark ID of the descrambling permission of scrambled program.Wherein
Scrambling identifier is labeled as CA_attibutes parameter, further includes NASP_SID in descriptor, and wherein NASP_SID indicates one
The program ID of a program, descrambling mark ID are denoted as NSAP_PPID value, and NSAP_PPID indicates that this program is saved if it is scrambling
Mesh, the permission needed.Front end authorizes anti-authorization to smart card, can change the list of the NSAP_PPID value of smart card.If intelligence
Can also there be this value in card, illustrate that smart card has the permission of this program, can descramble.Conversely, smart card is without this program
Permission, cannot descramble.
Specifically, before step S100 further include:
Step S1, program id information is stored in the database of set-top box in advance.
When it is implemented, program id information include Transport ID (transmission ID), Source ID (source ID),
Service ID (service ID), Transport ID, Source ID, service ID can determine a unique program.
These programme informations can be stored in the database D B of set-top box by this after searching programs.
Step S200, after the recording request for detecting program instructs, the descriptor of program is obtained, the description of program is passed through
Symbol judges whether program is scrambled program, if program is scrambled program, obtains the smart card having permission and descrambles to program,
And secondary encryption is carried out to the recorded file generated after performance recording according to descriptor and is stored；If program is unscrambled program,
Encryption storage is carried out to the recorded file generated after performance recording using universal key.
When it is implemented, the descriptor of program is obtained when detecting that user will record program A, according to the ginseng in descriptor
Numerical value judges whether program is scrambled program, if it is unscrambled program, records after saving id information and scrambled program identifier
Program, and encryption storage is carried out to program is recorded using universal code, if program is scrambled program, to judge current smart cards
Whether have permission, if had permission, records program after storing program id information and scrambled program identifier, and use descriptor
In parameter to record program carry out encryption storage.
In further embodiment, as shown in Fig. 2, step S200 is specifically included:
Step S201, after the recording request for detecting program instructs, program ID letter is obtained from the database of set-top box
It ceases, and describes the descriptor of acquisition program in table from program service；
Step S202, by the value of the scrambling identifier in the descriptor of program judge program be scrambled program be also it is non-plus
Disturb program；If program is scrambled program, S203 is thened follow the steps, if program is unscrambled program, thens follow the steps S204；
Step S203, judge smart card with the presence or absence of descrambling mark ID, and if it exists, then smart card has corresponding permission,
Smart card descrambles program, saves program id information and scrambling identifier, and according to descrambling mark ID to performance recording after
The recorded file of generation carries out secondary encryption storage；If it does not exist, then smart card does not have permission, cannot descramble to program,
Performance recording failure；
Step S204, save the scrambling identifier of program id information and program, and according to universal key to performance recording after
The recorded file of generation carries out secondary encryption storage.
When it is implemented, user select record program A, from database D B obtain program A Transport ID,
Source ID, service ID information.The NASP_CA_descriptor descriptor of program A is obtained from SDT table.The description
Symbol includes CA_attibutes and NSAP_PPID parameter；
By CA_attibutes parameter, determine that the program is scrambled program or unscrambled program.If it is unscrambled
Program saves the NASP_CA_ of A programme information Transport ID, Source ID, service ID and program A
Descriptor content is stored using general key encryption secondary to recorded file.If it is ciphered program, then need to judge
NSAP_PPID value；
If corresponding NSAP_PPID in smart card illustrates that smart card has the permission of this program, can descramble, A is saved
Programme information Transport ID, Source ID, service ID and program A NASP_CA_descriptor content simultaneously
According to NSAP_PPID encryption storage secondary to recorded file.Conversely, permission of the smart card without this program, cannot descramble, mention
Show that user does not have permission.
Step S300, after the playback request for detecting recorded file instructs, the descriptor of program is obtained, program is passed through
Descriptor judges whether program is scrambled program, if program is scrambled program, obtains the smart card having permission and carries out to program
Descrambling, is decrypted playback to recorded file according to the descriptor of program；If program is unscrambled program, universal key is used
Playback is decrypted to recorded file.
When it is implemented, the descriptor of program is obtained, according in descriptor when detecting that user plays back recording program A
Parameter value judges whether program is scrambled program, if it is unscrambled program, is decrypted using universal code to program is recorded
After play back, if program be scrambled program, to judge whether current smart cards have permission, if had permission, to record program
Descrambled, according to the parameter in descriptor to record program decryption after play back.
Can also be used in replayed section NASP_CA_descriptor be according to Transport ID, Source ID,
Service ID is obtained from code stream, so box must connection signal when playback.When in smart card associated rights change
When change, playback will affect.When the permission of program changes, the playback of this scheme will affect, the code stream recorded in the past is not
It can playback.
In further embodiment, direct recording ECM(Entitlement Control Message), the smart card of other boxes has correlative weight
Limit, so that it may play back.When associated rights change in smart card, playback also will affect.
In further embodiment, as shown in figure 3, step S300 is specifically included:
Step S301, after the playback request for detecting recorded file instructs, program is obtained from the database of set-top box
Id information describes the descriptor that program is obtained in table from program service；
Step S302, by the value of the scrambling identifier in the descriptor of program judge program be scrambled program be also it is non-plus
Disturb program；If program is scrambled program, S303 is thened follow the steps, if program is unscrambled program, thens follow the steps S304；
Step S303, judge in smart card with the presence or absence of descrambling mark ID, and if it exists, then smart card has playback right,
Smart card descrambles program, and according to descrambling mark ID to playing back after recorded file decryption, if it does not exist, then smart card does not have
There is playback right, program cannot be descrambled, programme replay failure；
Step S304, according to by being played back after the decryption of key pair recorded file.
When it is implemented, playback program A, reads information Transport ID, Source ID, the service of A program
The NASP_CA_descriptor content of ID and program A；By CA_attibutes parameter, determine that the program is scrambled program
Or unscrambled program.If it is unscrambled program, recorded file is decrypted using general key and is played back.If it is ciphered program,
It then needs to judge NSAP_PPID value.
If corresponding NSAP_PPID in smart card illustrates that smart card has the permission of this program, can descramble, according to
NSAP_PPID decrypts recorded file and plays back.Conversely, permission of the smart card without this program, cannot descramble, user is prompted not have
Permission.
The function of the preferred embodiment of the present invention also provides a kind of performance recording and playback system based on set-top box is former
Block diagram is managed, as shown in figure 4, system includes:
Descriptor adding module 100, for describing the descriptor for adding program in table in the program service of set-top box in advance；
Specifically as shown in embodiment of the method.
Performance recording module 200, for obtaining the descriptor of program, leading to after the recording request for detecting program instructs
Purpose of celebrating a festival descriptor judges whether program is scrambled program, if program is scrambled program, obtains the smart card pair having permission
Program is descrambled, and is carried out secondary encryption to the recorded file generated after performance recording according to descriptor and stored；If program is
Unscrambled program then carries out encryption storage to the recorded file generated after performance recording using universal key；Specific such as method is real
It applies shown in example.
Programme replay module 300, for obtaining the description of program after the playback request for detecting recorded file instructs
Symbol, judges whether program is scrambled program by the descriptor of program, if program is scrambled program, obtains the intelligence having permission
Card descrambles program, and playback is decrypted to recorded file according to the descriptor of program；If program is unscrambled program,
Playback is decrypted to recorded file using universal key；Specifically as shown in embodiment of the method.
It further carries out in example, system further include:
Module is stored in advance, for program id information to be stored in the database of set-top box in advance.
When it is implemented, being provided in the descriptor of the program for identifying program is scrambled program or unscrambled section
The descrambling of the descrambling permission of purpose scrambling identifier and mark scrambled program identifies ID；Specifically as shown in embodiment of the method.
Further embodiment, as shown in figure 5, performance recording module 200 specifically includes:
First detection with acquiring unit 201, for when detect program recording request instruction after, from the data of set-top box
Program id information is obtained in library, and the descriptor of acquisition program in table is described from program service；
First judging unit 202, the value for the scrambling identifier in the descriptor by program judge that program is scrambling
Program or unscrambled program；Specifically as shown in embodiment of the method.
First performance recording unit 203 judges smart card with the presence or absence of descrambling mark if being scrambled program for program
ID, and if it exists, then smart card has corresponding permission, and smart card descrambles program, saves program id information and scrambling mark
Know symbol, and secondary encryption is carried out to the recorded file generated after performance recording according to descrambling mark ID and is stored；If it does not exist, then intelligence
No permission can be blocked, program cannot be descrambled, performance recording failure；Specifically as shown in embodiment of the method.
Second program recording elements 204, if being unscrambled program for program, save program id information and program plus
Identifier is disturbed, and secondary encryption is carried out to the recorded file generated after performance recording according to universal key and is stored；Specific such as method
Shown in embodiment.
In further embodiment, as shown in fig. 6, programme replay module 300 specifically includes:
Second detection with acquiring unit 301, for when detect recorded file playback request instruction after, from set-top box
Program id information is obtained in database, and the descriptor that program is obtained in table is described from program service；Specifically such as embodiment of the method institute
Show.
Second judgment unit 302, the value for the scrambling identifier in the descriptor by program judge that program is scrambling
Program or unscrambled program；Specifically as shown in embodiment of the method.
First program playback unit 303 judges in smart card if being scrambled program for program with the presence or absence of descrambling mark
Know ID, and if it exists, then smart card has playback right, and smart card descrambles program, according to descrambling mark ID to recording text
It is played back after part decryption, if it does not exist, then smart card does not have playback right, cannot descramble to program, programme replay failure；
Specifically as shown in embodiment of the method.
Second program playback unit 304, if being unscrambled program for program, basis passes through key pair recorded file solution
Playback after close；Specifically as shown in embodiment of the method.
In conclusion the invention discloses a kind of performance recording based on set-top box and back method and system, method packet
It includes: when the recording request for detecting program, judging whether program is scrambled program, if scrambled program, then acquisition has permission
Smart card descrambles program, and carries out secondary encryption to recorded file according to descriptor and store；If unscrambled program, then
Encryption storage is carried out to recorded file using universal key；After the playback request for detecting recorded file instructs, judge whether
It then obtains the smart card having permission if scrambled program for scrambled program and program is descrambled, according to the descriptor pair of program
Playback is decrypted in recorded file；If not then playback is decrypted to recorded file using universal key in scrambled program.The present invention
Secondary encryption can be carried out to recorded file, while guaranteeing to record the safety of program, other have the set-top box of the programme rights
The recorded file can also be played back, is provided convenience for user's recording and playback program.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (8)
1. a kind of performance recording and back method based on set-top box, which is characterized in that the method includes the steps:
A, the descriptor that program is added in table is described in the program service of set-top box in advance；
B, after the recording request for detecting program instructs, the descriptor of program is obtained, program is judged by the descriptor of program
Whether it is scrambled program, if program is scrambled program, obtains the smart card having permission and program is descrambled, and according to description
It accords with and secondary encryption storage is carried out to the recorded file generated after performance recording；If program is unscrambled program, using general close
Key carries out encryption storage to the recorded file generated after performance recording；
C, after the playback request for detecting recorded file instructs, the descriptor of program is obtained, is judged by the descriptor of program
Whether program is scrambled program, if program is scrambled program, obtains the smart card having permission and descrambles to program, according to section
Playback is decrypted to recorded file in purpose descriptor；If program is unscrambled program, using universal key to recorded file
Playback is decrypted；
Be provided in the descriptor of the program for identify scrambling identifier that program is scrambled program or unscrambled program,
And the descrambling of the descrambling permission of mark scrambled program identifies ID.
2. the performance recording and back method according to claim 1 based on set-top box, which is characterized in that the step A
It further comprises the steps of: before
S, program id information is stored in the database of set-top box in advance.
3. the performance recording and back method according to claim 2 based on set-top box, which is characterized in that the step B
Specifically include step:
B1, after the recording request for detecting program instructs, program id information is obtained from the database of set-top box, and from program
The descriptor of program is obtained in SDT Service Description Table；
B2, judge that program is scrambled program or unscrambled program by the value of the scrambling identifier in the descriptor of program；
If B3, program be scrambled program, judge smart card with the presence or absence of descrambling mark ID, and if it exists, then smart card have pair
The permission answered, smart card descramble program, save program id information and scrambling identifier, and according to descrambling mark ID to section
The recorded file generated after catalogue system carries out secondary encryption storage；If it does not exist, then smart card does not have permission, cannot to program into
Row descrambling, performance recording failure；
If B4, program are unscrambled program, the scrambling identifier of program id information and program is saved, and according to universal key pair
The recorded file generated after performance recording carries out secondary encryption storage.
4. the performance recording and back method according to claim 3 based on set-top box, which is characterized in that the step C
Specifically include step:
C1, when detect recorded file playback request instruct after, from the database of set-top box obtain program id information, from section
The descriptor of program is obtained in mesh SDT Service Description Table；
C2, judge that program is scrambled program or unscrambled program by the value of the scrambling identifier in the descriptor of program；
If C3, program are scrambled program, judge in smart card with the presence or absence of descrambling mark ID, and if it exists, then smart card has
Playback right, smart card descramble program, according to descrambling mark ID to playing back after recorded file decryption, if it does not exist, then
Smart card does not have playback right, cannot descramble to program, programme replay failure；
If C4, program are unscrambled program, according to by being played back after the decryption of key pair recorded file.
5. a kind of performance recording and playback system based on set-top box, which is characterized in that system includes:
Descriptor adding module, for describing the descriptor for adding program in table in the program service of set-top box in advance；
Performance recording module, for obtaining the descriptor of program, passing through program after the recording request for detecting program instructs
Descriptor judges whether program is scrambled program, if program is scrambled program, obtains the smart card having permission and carries out to program
Descrambling, and secondary encryption is carried out to the recorded file generated after performance recording according to descriptor and is stored；If program is unscrambled section
Mesh then carries out encryption storage to the recorded file generated after performance recording using universal key；
Programme replay module, for obtaining the descriptor of program, passing through section after the playback request for detecting recorded file instructs
Purpose descriptor judges whether program is scrambled program, if program is scrambled program, obtains the smart card having permission to program
Descrambled, playback is decrypted to recorded file according to the descriptor of program；If program is unscrambled program, using general
Playback is decrypted in key pair recorded file；
Be provided in the descriptor of the program for identify scrambling identifier that program is scrambled program or unscrambled program,
And the descrambling of the descrambling permission of mark scrambled program identifies ID.
6. the performance recording and playback system according to claim 5 based on set-top box, which is characterized in that the system is also
Include:
Module is stored in advance, for program id information to be stored in the database of set-top box in advance.
7. the performance recording and playback system according to claim 6 based on set-top box, which is characterized in that the section directory
Molding block specifically includes:
First detection and acquiring unit, for being obtained from the database of set-top box after the recording request for detecting program instructs
Program id information is taken, and describes the descriptor of acquisition program in table from program service；
First judging unit, the value for the scrambling identifier in the descriptor by program judge program be scrambled program or
Unscrambled program；
First performance recording unit judges smart card with the presence or absence of descrambling mark ID, if depositing if being scrambled program for program
, then smart card has corresponding permission, and smart card descrambles program, program id information and scrambling identifier are saved, and
Secondary encryption is carried out to the recorded file generated after performance recording according to descrambling mark ID to store；If it does not exist, then smart card does not have
It has permission, program cannot be descrambled, performance recording failure；
Second program recording elements save the scrambling mark of program id information and program if being unscrambled program for program
Symbol, and secondary encryption is carried out to the recorded file generated after performance recording according to universal key and is stored.
8. the performance recording and playback system according to claim 7 based on set-top box, which is characterized in that the program returns
Amplification module specifically includes:
Second detection and acquiring unit, for when detect recorded file playback request instruction after, from the database of set-top box
Middle acquisition program id information describes the descriptor that program is obtained in table from program service；
Second judgment unit, the value for the scrambling identifier in the descriptor by program judge program be scrambled program or
Unscrambled program；
First program playback unit judges that whether there is descrambling in smart card identifies ID if being scrambled program for program, if
In the presence of then smart card has playback right, and smart card descrambles program, after being decrypted according to descrambling mark ID to recorded file
Playback, if it does not exist, then smart card does not have playback right, cannot descramble to program, programme replay failure；
Second program playback unit, if being unscrambled program for program, according to by being returned after the decryption of key pair recorded file
It puts.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610879569.9A CN106454488B (en) | 2016-10-09 | 2016-10-09 | A kind of performance recording based on set-top box and back method and system |
| PCT/CN2017/104295 WO2018064955A1 (en) | 2016-10-09 | 2017-09-29 | Method and system for recording and playing back program |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610879569.9A CN106454488B (en) | 2016-10-09 | 2016-10-09 | A kind of performance recording based on set-top box and back method and system |
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| CN106454488B (en) * | 2016-10-09 | 2019-06-11 | 深圳创维数字技术有限公司 | A kind of performance recording based on set-top box and back method and system |
| CN107094268B (en) * | 2017-03-27 | 2021-02-26 | 海信视像科技股份有限公司 | Program scheduled recording control method and device |
| CN107959890B (en) * | 2018-01-05 | 2020-06-23 | 深圳创维数字技术有限公司 | Detection method, device, terminal and storage medium for reserved recording |
| CN108337503B (en) * | 2018-01-25 | 2020-06-23 | 深圳创维数字技术有限公司 | Digital television field environment simulation method, terminal and computer readable medium |
| CN108322826A (en) * | 2018-03-01 | 2018-07-24 | 深圳创维数字技术有限公司 | EPG programme rights monitoring method, set-top box and storage medium |
| CN108965985A (en) * | 2018-08-30 | 2018-12-07 | 海信电子科技（深圳）有限公司 | A kind of method of program recording and device |
| CN109286849A (en) * | 2018-10-10 | 2019-01-29 | 四川长虹电器股份有限公司 | The system and method that the recording and playback of a kind of pair of scrambled program is controlled |
| CN112073660B (en) * | 2020-09-15 | 2023-03-10 | 深圳Tcl数字技术有限公司 | TLV data generation method, TLV data reading method, intelligent device and storage medium |
| CN114449349B (en) * | 2020-10-30 | 2023-07-25 | 深圳Tcl新技术有限公司 | Program recording method, device, equipment and computer readable storage medium |
| CN114257863B (en) * | 2022-03-02 | 2022-06-24 | 深圳佳力拓科技有限公司 | Set top box playback system and method for displaying fingerprint screen display through recording clear stream |
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| WO2018064955A1 (en) | 2018-04-12 |
| CN106454488A (en) | 2017-02-22 |
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