CN108156513B - Program descrambling and recording method, set top box and storage medium - Google Patents

Program descrambling and recording method, set top box and storage medium Download PDF

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CN108156513B
CN108156513B CN201711438874.5A CN201711438874A CN108156513B CN 108156513 B CN108156513 B CN 108156513B CN 201711438874 A CN201711438874 A CN 201711438874A CN 108156513 B CN108156513 B CN 108156513B
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program
descrambling
recorded
channel
descramblers
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CN108156513A (en
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杨盛棕
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Shenzhen Skyworth Digital Technology Co Ltd
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Shenzhen Skyworth Digital Technology Co Ltd
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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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4334—Recording operations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • 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 encoded video stream packets from an IP network
    • H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
    • H04N21/43853—Multiplex stream processing, e.g. multiplex stream decrypting involving multiplex stream decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—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 encoded video stream packets from an IP network
    • H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
    • H04N21/43853—Multiplex stream processing, e.g. multiplex stream decrypting involving multiplex stream decryption
    • H04N21/43856—Multiplex stream processing, e.g. multiplex stream decrypting involving multiplex stream decryption by partial decryption, e.g. decrypting a multiplex stream that has been partially encrypted
    • 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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/4424—Monitoring of the internal components or processes of the client device, e.g. CPU or memory load, processing speed, timer, counter or percentage of the hard disk space used
    • 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)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

The invention discloses a program descrambling and recording method, a set top box and a storage medium, wherein the method comprises the following steps: when a recording request is detected during descrambling of a live program through a descrambler, the set top box judges whether a program to be recorded corresponding to the recording request is the live program; when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request; and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers. When the number of the descramblers is not enough, the descrambler of the live program is not disconnected, but the priority part of the program to be recorded is connected with the descrambler, so that the live broadcast experience of a user can be ensured, the recording effect of the program to be recorded is improved, and the production cost is also controlled.

Description

Program descrambling and recording method, set top box and storage medium
Technical Field
The invention relates to the field of smart televisions, in particular to a program descrambling and recording method, a set top box and a storage medium.
Background
Program recording is a basic function in a set-top box, and for the recording of scrambled programs, the descrambling module is required to support, and the use of a descrambler is involved. But the number of hardware descramblers of a chip is often very limited. The descramblers needed in a scrambled program may be multiple paths, including audio and video, multiple audio frequencies, teletext subtitles, and the like, and are recorded while watching the program, and normally twice descramblers are needed at most, so how to save resources on the limited descrambler resources becomes important.
In the application of program recording, there are various technical schemes, and the main technical scheme applied to the digital set top box at present is as follows:
scheme one, scheme for increasing number of descramblers in hardware
This scheme is most efficient, the insufficient number of descramblers can be solved by adding descramblers in hardware, and this is simpler to implement without any special processing in software.
Scheme two, reducing the number of descramblers used for live programs
Because the program is watched aiming at multiple audios, generally, only one audio can be listened at the same time, or the teletext function can not be started, so that less live broadcasts can be started, and some descrambling channels are left for recording.
However, the solution is mainly a problem of cost, and the control cost becomes relatively critical for the industry of the competitive incentive of the set-top box, so that the cost is increased inevitably due to the increase of the hardware overhead, and the chip manufacturer does not necessarily have so many chips to choose from. In the second scheme, resources can be saved, but the live broadcast experience of a user is reduced, and some receiving systems do not disturb the channel setting key, which may cause some receiving system modules not to work normally.
Disclosure of Invention
The invention mainly aims to provide a program descrambling and recording method, a set top box and a storage medium, and aims to solve the technical problem that user experience and manufacturing cost are difficult to take into account in the prior art.
In order to achieve the above object, the present invention provides a program descrambling and recording method, comprising the following steps:
when a recording request is detected during descrambling of a live program through a descrambler, the set top box judges whether a program to be recorded corresponding to the recording request is the live program;
when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request;
and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers.
Preferably, when the current number of available descramblers is less than the number required by the descramblers, after establishing a first true descrambling channel for the priority part in the program to be recorded according to the descrambler corresponding to the number of available descramblers, the program descrambling and recording method further includes:
and descrambling the priority part in the program to be recorded through a descrambler corresponding to the first real descrambling channel.
Preferably, the descrambling the priority part of the program to be recorded by the descrambler corresponding to the first true descrambling channel specifically includes:
searching a first data filter corresponding to the first real descrambling channel in a mapping relation, wherein the mapping relation comprises the corresponding relation between the real descrambling channel and the data filter;
acquiring program data corresponding to each priority part, and sending the program data corresponding to each priority part to the first real descrambling channel corresponding to each priority part through the first data filter;
descrambling the received program data according to the descrambler corresponding to the first real descrambling channel, and storing the descrambled program data.
Preferably, before the searching for the first data filter corresponding to the first real descrambling channel in the mapping relationship, the program descrambling and recording method further includes:
and judging whether the first real descrambling channel is associated with a data filter, when the first real descrambling channel is not associated with the data filter, establishing a corresponding relation between the first real descrambling channel and the first data filter, and storing the corresponding relation into the mapping relation.
Preferably, before descrambling the received program data according to the descrambler corresponding to the first true descrambling channel and storing the descrambled program data, the program descrambling and recording method further includes:
extracting encrypted descrambling information from the program data, acquiring a service key when the service key sent by a preset storage area is detected, and decrypting the encrypted descrambling information according to the service key to acquire the descrambling information;
correspondingly, the descrambling the received program data according to the descrambler corresponding to the first true descrambling channel and storing the descrambled program data specifically includes:
descrambling the received program data according to the descrambler corresponding to the first real descrambling channel and the descrambling information, and storing the descrambled program data.
Preferably, when the current number of available descramblers is less than the number required by the descramblers, after establishing a first true descrambling channel for the priority part in the program to be recorded according to the descrambler corresponding to the number of available descramblers, the program descrambling and recording method further includes:
establishing a first virtual descrambling channel for the rest part of the program to be recorded;
correspondingly, after the service key sent by the preset storage area is detected, the program descrambling and recording method further includes:
and intercepting the service key when detecting the service key sent to the first virtual descrambling channel by the preset storage area, and returning a successful receiving identifier to the preset storage area.
Preferably, the determining whether the program to be recorded corresponding to the recording request is the live program specifically includes:
and extracting the PID of the program to be recorded from the recording request, acquiring the PID of the live program, comparing the PID of the program to be recorded with the PID of the live program, and judging whether the program to be recorded corresponding to the recording request is the live program or not according to a comparison result.
Preferably, after the step of judging whether the program to be recorded corresponding to the recording request is the live program according to the comparison result, the program descrambling and recording method further includes:
and when the judgment result shows that the program to be recorded is the live program, acquiring a second real descrambling channel of the live program, and descrambling and recording the program to be recorded through the second real descrambling channel.
In addition, to achieve the above object, the present invention also provides a set top box, including: the program descrambling and recording program is stored on the memory and can be operated on the processor, and the program descrambling and recording program realizes the steps of the program descrambling and recording method when being executed by the processor.
In addition, in order to achieve the above object, the present invention further provides a storage medium, where a program descrambling and recording program is stored, and the program descrambling and recording program is executed by a processor to implement the steps of the program descrambling and recording method.
In the invention, when a recording request is detected during descrambling a live program through a descrambler, a set top box judges whether a program to be recorded corresponding to the recording request is the live program; when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request; and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers. When the number of the descramblers is not enough, the descrambler of the live program is not disconnected, but the priority part of the program to be recorded is connected with the descrambler, so that the live broadcast experience of a user can be ensured, the recording effect of the program to be recorded is improved, and the production cost is also controlled.
Drawings
Fig. 1 is a schematic diagram of a set-top box structure of a hardware operating environment according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a program descrambling and recording method according to a first embodiment of the present invention;
fig. 3 is a flowchart illustrating a program descrambling and recording method according to a second embodiment of the present invention;
fig. 4 is a flowchart illustrating a program descrambling and recording method according to a third embodiment of the present invention;
fig. 5 is a flowchart illustrating a program descrambling and recording method according to a fourth embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The solution of the embodiment of the invention is mainly as follows: when a recording request is detected during descrambling of a live program through a descrambler, judging whether a program to be recorded corresponding to the recording request is the live program or not; when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request; and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers. When the number of the descramblers is not enough, the descrambler of the live program is not disconnected, but the priority part of the program to be recorded is connected with the descrambler, so that the live broadcast experience of a user can be ensured, the recording effect of the program to be recorded is improved, and the production cost is also controlled.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a set-top box in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the set-top box may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may comprise a Display screen (Display), and the optional user interface 1003 may also comprise a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage server separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 is not intended to be limiting of the set top box and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a program descrambling and recording program.
The server calls a program descrambling and recording program stored in the memory 1005 through the processor 1001, and performs the following operations:
when a recording request is detected during descrambling of a live program through a descrambler, the set top box judges whether a program to be recorded corresponding to the recording request is the live program;
when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request;
and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers.
Further, the processor 1001 may call a program descrambling and recording program stored in the memory 1005, and further perform the following operations:
and descrambling the priority part in the program to be recorded through a descrambler corresponding to the first real descrambling channel.
Further, the processor 1001 may call a program descrambling and recording program stored in the memory 1005, and further perform the following operations:
searching a first data filter corresponding to the first real descrambling channel in a mapping relation, wherein the mapping relation comprises the corresponding relation between the real descrambling channel and the data filter;
acquiring program data corresponding to each priority part, and sending the program data corresponding to each priority part to the first real descrambling channel corresponding to each priority part through the first data filter;
descrambling the received program data according to the descrambler corresponding to the first real descrambling channel, and storing the descrambled program data.
Further, the processor 1001 may call a program descrambling and recording program stored in the memory 1005, and further perform the following operations:
and judging whether the first real descrambling channel is associated with a data filter, when the first real descrambling channel is not associated with the data filter, establishing a corresponding relation between the first real descrambling channel and the first data filter, and storing the corresponding relation into the mapping relation.
Further, the processor 1001 may call a program descrambling and recording program stored in the memory 1005, and further perform the following operations:
extracting encrypted descrambling information from the program data, acquiring a service key when the service key sent by a preset storage area is detected, and decrypting the encrypted descrambling information according to the service key to acquire the descrambling information;
correspondingly, the descrambling the received program data according to the descrambler corresponding to the first true descrambling channel and storing the descrambled program data specifically includes:
descrambling the received program data according to the descrambler corresponding to the first real descrambling channel and the descrambling information, and storing the descrambled program data.
Further, the processor 1001 may call a program descrambling and recording program stored in the memory 1005, and further perform the following operations:
establishing a first virtual descrambling channel for the rest part of the program to be recorded;
correspondingly, after the service key sent by the preset storage area is detected, the program descrambling and recording method further includes:
and intercepting the service key when detecting the service key sent to the first virtual descrambling channel by the preset storage area, and returning a successful receiving identifier to the preset storage area.
Further, the processor 1001 may call a program descrambling and recording program stored in the memory 1005, and further perform the following operations:
and extracting the PID of the program to be recorded from the recording request, acquiring the PID of the live program, comparing the PID of the program to be recorded with the PID of the live program, and judging whether the program to be recorded corresponding to the recording request is the live program or not according to a comparison result.
Further, the processor 1001 may call a program descrambling and recording program stored in the memory 1005, and further perform the following operations:
and when the judgment result shows that the program to be recorded is the live program, acquiring a second real descrambling channel of the live program, and descrambling and recording the program to be recorded through the second real descrambling channel.
In this embodiment, when a recording request is detected during descrambling a live program through a descrambler, a set-top box determines whether a program to be recorded corresponding to the recording request is the live program; when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request; and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers. In the embodiment, when the number of the descramblers is not enough, the descrambler of the live program is not disconnected, but the priority part of the program to be recorded is connected with the descrambler, so that the live broadcast experience of a user can be ensured, the recording effect of the program to be recorded is improved, and the production cost is also controlled.
Based on the hardware structure, the embodiment of the program descrambling and recording method is provided.
Referring to fig. 2, fig. 2 is a flowchart illustrating a program descrambling and recording method according to a first embodiment of the present invention.
In a first embodiment, the program descrambling and recording method includes the following steps:
step S10: when detecting a recording request during descrambling a live program through a descrambler, the set top box judges whether a program to be recorded corresponding to the recording request is the live program.
It should be noted that the Set Top Box (STB) is a device for connecting a television Set and an external signal source, the STB can convert a compressed digital signal into television content and display the television content on the television Set, and the content received by the STB includes an image, an audio, multiple audio and the like of a television program. The descrambler is a hardware device for descrambling scrambled television signals in the set top box, wherein scrambling refers to that some characteristics of the television signals are changed or controlled at a television signal sending end, so that an unauthorized person cannot watch clear television programs by receiving the interfered television signals, and an authorized user is provided with the descrambler in the set top box and can descramble the scrambled television line numbers so as to watch clear images and accompanying sound.
It is understood that program recording is a basic function of the set-top box, and resources of a descrambler are occupied for obtaining descrambled program data when program recording is performed. When the television is playing, the television program is recorded, both the live program and the recorded program need to occupy the resources of the descrambler, and in order to balance the watching effect of the live program and the use of the resources of the descrambler, the descrambling of the recorded program is properly reduced. The recording request refers to a request for recording a specified television program by a user. Because the live broadcast and the recording of the same program correspond to the same Packet IDentifier (PID), when the live broadcast program and the program to be recorded are the same program and the live broadcast program is not the same program as the program to be recorded, the corresponding solving strategies are not consistent, and therefore, whether the program to be recorded corresponding to the recording request is the live broadcast program or not is judged.
In the specific implementation, the set top box descrambles a live program through a descrambler to enable the live program to be displayed on a television screen clearly, and when the set top box receives a recording request which is input by a user and contains a program to be recorded, the set top box extracts the program to be recorded from the recording request, compares the program to be recorded with the currently played live program, and judges whether the program to be recorded is the live program.
Step S20: and when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request.
It can be understood that the number of descramblers required is the number of descramblers required for descrambling the program to be recorded, when descrambling the television program, the television program is divided into a plurality of parts including an image, an audio, a multi-audio, a teletext subtitle, and the like, each part of the television program correspondingly needs a certain number of descramblers for descrambling, and the number of descramblers required for recording the program to be recorded, that is, the number of descramblers required, can be obtained by analyzing the program to be recorded.
In a specific implementation, when the recording request is generated, the program to be recorded is analyzed, the number of descramblers required for descrambling the program to be recorded is obtained, and the recording request is generated according to the information of the program to be recorded, the number of descramblers required and the like. Therefore, when the set top box judges that the program to be recorded is not the live program, the recording request is analyzed, and the number of the descramblers required is extracted from the recording request.
Step S30: and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers.
It should be noted that the current available number of descramblers refers to the number of descramblers obtained by subtracting the number of currently occupied descramblers and the number of other unavailable descramblers from the number of all descramblers in the set-top box, that is, the number of descramblers that can be currently used for descrambling the program to be recorded, and the descrambler corresponding to the available number of descramblers refers to a descrambler that is currently unoccupied and can be used for descrambling the program to be recorded. The priority part refers to a part which is important for television viewers to watch television programs, for example, the television programs are divided into a plurality of parts, including images, audio, multiple audios, teletext and the like, the parts are arranged in a priority order according to watching demands and experiences, the front part is the priority part relative to the rear part, and for the television viewers, the images and the audio are the most basic parts for watching the programs, so the images and the audio are the priority parts relative to the multiple audios and the teletext. The priority part of the program to be recorded refers to the program part before the priority sequence of the program to be recorded.
It is understood that the first real channel refers to a descrambling channel, which is connected to a descrambler and can descramble a television program. When the available number of the current descramblers is less than the required number of the descramblers, all parts of the program to be recorded cannot be descrambled necessarily, so that a priority part is selected from all parts of the program to be recorded, the first real channel is established for the priority part, the priority part is descrambled, and the recording effect of the program to be recorded is improved.
In this embodiment, when a recording request is detected during descrambling a live program through a descrambler, a set-top box determines whether a program to be recorded corresponding to the recording request is the live program; when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request; and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers. In the embodiment, when the number of the descramblers is not enough, the descrambler of the live program is not disconnected, but the priority part of the program to be recorded is connected with the descrambler, so that the live broadcast experience of a user can be ensured, the recording effect of the program to be recorded is improved, and the production cost is also controlled.
Referring to fig. 3, fig. 3 is a flowchart illustrating a program descrambling and recording method according to a second embodiment of the present invention, and the program descrambling and recording method according to the second embodiment of the present invention is proposed based on the embodiment shown in fig. 2.
In the second embodiment, after step S30, the program descrambling and recording method further includes:
step S40: and descrambling the priority part in the program to be recorded through a descrambler corresponding to the first real descrambling channel.
It can be understood that, after the first descrambling channel is established for the priority part of the program to be recorded, the priority part of the program to be recorded will be descrambled through the first real descrambling channel.
Further, the step S40 specifically includes:
step S401: and searching a first data filter corresponding to the first real descrambling channel in a mapping relation, wherein the mapping relation comprises the corresponding relation between the real descrambling channel and the data filter.
It should be noted that, before the scrambled television signals enter the descrambling channels, different scrambled television signals can enter respective correct descrambling channels through the data filters, so that after the first true descrambling channel is established, the first data filter corresponding to the first descrambling channel is searched, so that the priority part enters the correct descrambling channel.
Step S402: and acquiring program data corresponding to each priority part, and sending the program data corresponding to each priority part to the first real descrambling channel corresponding to each priority part through the first data filter.
It is understood that after determining the data filter, program data corresponding to each priority portion is obtained, and the program data refers to a television signal corresponding to the program to be recorded. The first real channel comprises a plurality of descrambling channels, each descrambling channel corresponds to different priority parts, the first data filter comprises a plurality of data filters, and each data filter corresponds to a different first descrambling channel, so that after program data are acquired, the program data can be sent to the corresponding first real descrambling channel through the first data filter.
In a specific implementation, program data corresponding to each priority portion, including image data and audio data, is acquired, and the image data is sent to a first real descrambling channel corresponding to the image data through a first data filter corresponding to the image data. Of course, the audio data is sent to the first true descrambling channel corresponding to the audio data in the same manner.
Step S403: descrambling the received program data according to the descrambler corresponding to the first real descrambling channel, and storing the descrambled program data.
It can be understood that after receiving the program data, the program data will be descrambled by the descrambler corresponding to the first true descrambling channel, and the descrambled image, audio and other data will be stored as composite video.
Further, before the step S401, the program descrambling and recording method further includes:
step S400: and judging whether the first real descrambling channel is associated with a data filter, when the first real descrambling channel is not associated with the data filter, establishing a corresponding relation between the first real descrambling channel and the first data filter, and storing the corresponding relation into the mapping relation.
It should be noted that the mapping relationship includes a corresponding relationship between a real descrambling channel and a data filter, and when the mapping relationship is established, only a real descrambling channel that is not associated with the data filter is associated, so that it is determined whether the first real descrambling channel is associated with the data filter, and when the first real descrambling channel is not associated with the data filter, the first data filter is obtained, and the first real descrambling channel is associated with the first data filter, so as to establish a corresponding relationship between the first real descrambling channel and the first data filter, and store the corresponding relationship into the mapping relationship.
In this embodiment, a first data filter corresponding to the first real descrambling channel is searched in a mapping relationship, where the mapping relationship includes a corresponding relationship between the real descrambling channel and the data filter, to obtain program data corresponding to each priority portion, the program data corresponding to each priority portion is sent to the first real descrambling channel corresponding to each priority portion through the first data filter, the received program data is descrambled according to a descrambler corresponding to the first real descrambling channel, and the descrambled program data is stored. In the embodiment, the program data corresponding to each priority part is sent to the first real descrambling channel corresponding to each priority part through the data filter, so that the program data can enter the correct descrambling channel, and the descrambling effect is improved.
Referring to fig. 4, fig. 4 is a flowchart illustrating a program descrambling and recording method according to a third embodiment of the present invention, and the program descrambling and recording method according to the third embodiment of the present invention is proposed based on the embodiment shown in fig. 3.
In this embodiment, before the step S403, the program descrambling and recording method further includes:
step S4031: and extracting the encrypted descrambling information from the program data, acquiring the service key when detecting the service key sent by a preset storage area, and decrypting the encrypted descrambling information according to the service key to obtain the descrambling information.
It should be noted that, the set-top box receives the scrambled television signal and the descrambling information encrypted by the service key, where the descrambling information is how to descramble the television signal, and the sending end of the television signal encrypts the descrambling information by the service key to ensure that the descrambling information is not decrypted, so that the scrambling and descrambling link is safer. The preset area refers to a pre-extracted storage area in the set-top box and is used for sending the service key to the set-top box of an authorized user, and an unauthorized user cannot acquire the service key, so that descrambling information cannot be decrypted, and television signals cannot be descrambled. And the program data can simultaneously transmit the encrypted descrambling information during transmission, and after the service key is obtained, the encrypted descrambling information is decrypted through the service key so as to obtain the descrambling information.
In a specific implementation, when the program data is received, the encrypted descrambling information is extracted from the program data, a service key is obtained from a preset storage area, and the encrypted descrambling information is decrypted according to the service key, so that the descrambling information can be obtained.
Further, the step S403 specifically includes:
step S4032: descrambling the received program data according to the descrambler corresponding to the first real descrambling channel and the descrambling information, and storing the descrambled program data.
It can be understood that, after obtaining the descrambling information, the descrambler corresponding to the first true descrambling channel descrambles the received program data through the descrambling information, and stores the descrambled program data for the user to watch later.
Further, after step S30, the program descrambling and recording method further includes:
step S50: and establishing a first virtual descrambling channel for the rest part of the program to be recorded.
It should be noted that the first virtual descrambling channel is a virtual descrambling channel, so that each part of the program to be recorded has a descrambling channel, but the television signal cannot be transmitted to a descrambler for descrambling. The method has the advantages that when a certain part of the program to be recorded does not have a descrambling channel, the part still generates a PID (proportion integration differentiation) although the part does not have the descrambling channel, and the part is encrypted before being transmitted to a television receiving end, and for the encrypted PID, if the descrambling channel is not set, the preset storage area cannot normally work, so that a first virtual descrambling channel is established for the rest part of the program to be recorded, and the normal work of the preset storage area can be ensured.
Correspondingly, after step S4031, the program descrambling and recording method further includes:
step S4033: and intercepting the service key when detecting the service key sent to the first virtual descrambling channel by the preset storage area, and returning a successful receiving identifier to the preset storage area.
It can be understood that, since the first virtual descrambling channel is not a real descrambling channel and is not connected to a real descrambler, when the preset storage area sends a service key to the first virtual descrambling channel, the service key is intercepted, and a reception success identifier is returned to the preset storage area, so that the preset storage area keeps normal operation.
In this embodiment, after the service key and the encrypted descrambling information are obtained, the service key is used to decrypt the encrypted descrambling information to obtain the descrambling information, so as to descramble the program data of the program to be recorded, and the normal operation of the preset storage area is maintained by establishing the first virtual descrambling channel.
Referring to fig. 5, fig. 5 is a flowchart illustrating a program descrambling and recording method according to a fourth embodiment of the present invention, and based on the embodiment shown in fig. 2, a program descrambling and recording method according to a fourth embodiment of the present invention is proposed.
In this embodiment, the step S10 specifically includes:
step S101: and extracting the PID of the program to be recorded from the recording request, acquiring the PID of the live program, comparing the PID of the program to be recorded with the PID of the live program, and judging whether the program to be recorded corresponding to the recording request is the live program or not according to a comparison result.
It can be understood that, since the live program and the recording of the same program have the same PID, whether the program to be recorded is the live program is determined by comparing the PIDs of the program to be recorded and the live program.
Further, after step S101, the program descrambling and recording method further includes:
step S102: and when the judgment result shows that the program to be recorded is the live program, acquiring a second real descrambling channel of the live program, and descrambling and recording the program to be recorded through the second real descrambling channel.
It should be noted that, when the determination result is that the program to be recorded is the live program, real descrambling channels are established for each part of the live program, including images, audio, multiple audio frequencies and text subtitles, so that when the program to be recorded is the live program, the real descrambling channels of the live program can be used to descramble the program to be recorded without occupying other descramblers, thereby saving descrambler resources.
Certainly, after a second real descrambling channel of the live program is obtained, a second virtual descrambling channel corresponding to the second real descrambling channel is established for the program to be recorded, so as to ensure the normal operation of the preset storage area.
Further, after the step S30, the method further includes:
when a set top box receives a channel switching request during descrambling a recorded program through a descrambler, judging whether a live program corresponding to the channel switching request is the recorded program or not;
and when the live program is the recorded program, exchanging the real descrambling channel of the live program with the virtual descrambling channel of the recorded program, recording the recorded program through the exchanged real descrambling channel, and closing the exchanged virtual descrambling channel.
It should be noted that, when the descrambler descrambles a live program and a recorded program, if the live program and the recorded program are the same program, the live program is connected to a real descrambling channel, and the recorded program is connected to a virtual descrambling channel corresponding to the real descrambling channel. When a user inputs a channel switching request, because the recorded program is connected with the virtual descrambling channel, if the real descrambling channel of the live program is directly closed, the recorded program cannot be descrambled, therefore, the real descrambling channel of the live program is exchanged with the virtual descrambling channel of the recorded program, after the exchange, the recorded program is connected with the real descrambling channel for continuous recording, the live program is connected with the virtual descrambling channel, and the virtual descrambling channel is closed when the live program is closed. Certainly, when the live program and the recorded program are different programs, closing the real descrambling channel of the live program has no influence on the recorded program, and the real descrambling channel of the live program is directly closed.
Further, before the closing the real descrambling channel of the live program, the method further includes:
and disconnecting the association between the real descrambling channel and the corresponding data filter.
It will be appreciated that each descrambling channel must be disconnected from the data filter corresponding to the previously associated PID before being shut down, the disconnection being the inverse of the association. Because only the real descrambling channel has the associated data filter, the disconnection process does not need to distinguish live broadcasting or recording, only needs to judge whether the PID corresponding to the descrambling channel has the real descrambling channel, disconnects the association between the real descrambling channel and the data filter, and does not need to disconnect the virtual descrambling channel.
In this embodiment, the PID of the program to be recorded is extracted from the recording request, the PID of the live program is acquired, the PID of the program to be recorded is compared with the PID of the live program, whether the program to be recorded corresponding to the recording request is the live program is judged according to the comparison result, when the judgment result is that the program to be recorded is the live program, a second real descrambling channel of the live program is acquired, and the program to be recorded is descrambled and recorded through the second real descrambling channel. Because the PID is used for comparison, whether the program to be recorded and the live program are the same program or not can be quickly determined, the operation efficiency is improved, when the program to be recorded is the live program, the program to be recorded is descrambled directly through a real descrambling channel of the live program, and the descrambler resource is saved.
In addition, an embodiment of the present invention further provides a storage medium, where a program descrambling and recording program is stored on the storage medium, and when executed by a processor, the program descrambling and recording program implements the following operations:
when a recording request is detected during descrambling of a live program through a descrambler, the set top box judges whether a program to be recorded corresponding to the recording request is the live program;
when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request;
and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers.
Further, the program descrambling and recording program when executed by the processor further realizes the following operations:
and descrambling the priority part in the program to be recorded through a descrambler corresponding to the first real descrambling channel.
Further, the program descrambling and recording program when executed by the processor further realizes the following operations:
searching a first data filter corresponding to the first real descrambling channel in a mapping relation, wherein the mapping relation comprises the corresponding relation between the real descrambling channel and the data filter;
acquiring program data corresponding to each priority part, and sending the program data corresponding to each priority part to the first real descrambling channel corresponding to each priority part through the first data filter;
descrambling the received program data according to the descrambler corresponding to the first real descrambling channel, and storing the descrambled program data.
Further, the program descrambling and recording program when executed by the processor further realizes the following operations:
and judging whether the first real descrambling channel is associated with a data filter, when the first real descrambling channel is not associated with the data filter, establishing a corresponding relation between the first real descrambling channel and the first data filter, and storing the corresponding relation into the mapping relation.
Further, the program descrambling and recording program when executed by the processor further realizes the following operations:
extracting encrypted descrambling information from the program data, acquiring a service key when the service key sent by a preset storage area is detected, and decrypting the encrypted descrambling information according to the service key to acquire the descrambling information;
correspondingly, the descrambling the received program data according to the descrambler corresponding to the first true descrambling channel and storing the descrambled program data specifically includes:
descrambling the received program data according to the descrambler corresponding to the first real descrambling channel and the descrambling information, and storing the descrambled program data.
Further, the program descrambling and recording program when executed by the processor further realizes the following operations:
establishing a first virtual descrambling channel for the rest part of the program to be recorded;
correspondingly, after the service key sent by the preset storage area is detected, the program descrambling and recording method further includes:
and intercepting the service key when detecting the service key sent to the first virtual descrambling channel by the preset storage area, and returning a successful receiving identifier to the preset storage area.
Further, the program descrambling and recording program when executed by the processor further realizes the following operations:
and extracting the PID of the program to be recorded from the recording request, acquiring the PID of the live program, comparing the PID of the program to be recorded with the PID of the live program, and judging whether the program to be recorded corresponding to the recording request is the live program or not according to a comparison result.
Further, the program descrambling and recording program when executed by the processor further realizes the following operations:
and when the judgment result shows that the program to be recorded is the live program, acquiring a second real descrambling channel of the live program, and descrambling and recording the program to be recorded through the second real descrambling channel.
In this embodiment, when a recording request is detected during descrambling a live program through a descrambler, a set-top box determines whether a program to be recorded corresponding to the recording request is the live program; when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request; and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers. In the embodiment, when the number of the descramblers is not enough, the descrambler of the live program is not disconnected, but the priority part of the program to be recorded is connected with the descrambler, so that the live broadcast experience of a user can be ensured, the recording effect of the program to be recorded is improved, and the production cost is also controlled.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The use of the words first, second, third, etc. do not denote any order, but rather the words are to be construed as names.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A program descrambling and recording method is characterized by comprising the following steps:
when a recording request is detected during descrambling of a live program through a descrambler, the set top box judges whether a program to be recorded corresponding to the recording request is the live program;
when the program to be recorded is not the live program, extracting the number of descramblers required from the recording request;
and when the available number of the current descramblers is less than the required number of the descramblers, establishing a first real descrambling channel for the priority part in the program to be recorded according to the descramblers corresponding to the available number of the descramblers.
2. The program descrambling and recording method of claim 1, wherein when the current number of descramblers available is less than the number of descramblers required, after a first true descrambling channel is established for a priority part in the program to be recorded according to the descrambler corresponding to the number of descramblers available, the program descrambling and recording method further comprises:
and descrambling the priority part in the program to be recorded through a descrambler corresponding to the first real descrambling channel.
3. The program descrambling and recording method of claim 2, wherein the descrambling the priority part of the program to be recorded by the descrambler corresponding to the first true descrambling channel specifically comprises:
searching a first data filter corresponding to the first real descrambling channel in a mapping relation, wherein the mapping relation comprises the corresponding relation between the real descrambling channel and the data filter;
acquiring program data corresponding to each priority part, and sending the program data corresponding to each priority part to the first real descrambling channel corresponding to each priority part through the first data filter;
descrambling the received program data according to the descrambler corresponding to the first real descrambling channel, and storing the descrambled program data.
4. The program descrambling and recording method of claim 3, wherein before searching the first data filter corresponding to the first real descrambling channel in the mapping relationship, the program descrambling and recording method further comprises:
and judging whether the first real descrambling channel is associated with a data filter, when the first real descrambling channel is not associated with the data filter, establishing a corresponding relation between the first real descrambling channel and the first data filter, and storing the corresponding relation into the mapping relation.
5. The program descrambling and recording method of claim 4, wherein before descrambling the received program data according to the descrambler corresponding to the first true descrambling channel and storing the descrambled program data, the program descrambling and recording method further comprises:
extracting encrypted descrambling information from the program data, acquiring a service key when the service key sent by a preset storage area is detected, and decrypting the encrypted descrambling information according to the service key to acquire the descrambling information;
correspondingly, the descrambling the received program data according to the descrambler corresponding to the first true descrambling channel and storing the descrambled program data specifically includes:
descrambling the received program data according to the descrambler corresponding to the first real descrambling channel and the descrambling information, and storing the descrambled program data.
6. The program descrambling and recording method of claim 5, wherein when the current number of descramblers available is less than the number of descramblers required, after a first true descrambling channel is established for a priority part in the program to be recorded according to the descrambler corresponding to the number of descramblers available, the program descrambling and recording method further comprises:
establishing a first virtual descrambling channel for the rest part of the program to be recorded;
correspondingly, after the service key sent by the preset storage area is detected, the program descrambling and recording method further includes:
and intercepting the service key when detecting the service key sent to the first virtual descrambling channel by the preset storage area, and returning a successful receiving identifier to the preset storage area.
7. The program descrambling and recording method of any of claims 1-6, wherein the determining whether the program to be recorded corresponding to the recording request is the live program specifically comprises:
and extracting the PID of the program to be recorded from the recording request, acquiring the PID of the live program, comparing the PID of the program to be recorded with the PID of the live program, and judging whether the program to be recorded corresponding to the recording request is the live program or not according to a comparison result.
8. The program descrambling and recording method of claim 7, wherein after the step of determining whether the program to be recorded corresponding to the recording request is the live program according to the comparison result, the program descrambling and recording method further comprises:
and when the judgment result shows that the program to be recorded is the live program, acquiring a second real descrambling channel of the live program, and descrambling and recording the program to be recorded through the second real descrambling channel.
9. A set top box, comprising: a memory, a processor and a program descrambling and recording program stored on the memory and capable of running on the processor, wherein the program descrambling and recording program is executed by the processor to realize the steps of the program descrambling and recording method according to any one of claims 1 to 8.
10. A storage medium, wherein the storage medium stores a program descrambling and recording program, and the program descrambling and recording program is executed by a processor to implement the steps of the program descrambling and recording method according to any one of claims 1 to 8.
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