CN102223582A - Decrypting descrambling device, decrypting descrambling method and disposing method - Google Patents

Decrypting descrambling device, decrypting descrambling method and disposing method Download PDF

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CN102223582A
CN102223582A CN2010105331286A CN201010533128A CN102223582A CN 102223582 A CN102223582 A CN 102223582A CN 2010105331286 A CN2010105331286 A CN 2010105331286A CN 201010533128 A CN201010533128 A CN 201010533128A CN 102223582 A CN102223582 A CN 102223582A
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descrambling
multiplex
signal
deciphering
unit
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CN102223582B (en
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施郁锵
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Abstract

The invention relates to a decrypting descrambling device for receiving encrypted scrambled broadcasts, a decrypting descrambling method and a disposing method. The decrypting descrambling device comprises a first transmission interface, a mult-itask unit and a descrambling unit. The first transmission interface is used for receiving a digital signal. The multi-task unit which is electrically connected with the first transmission interface is used for decrypting and descrambling the digital signal so as to generate a multitask digital signal and a broadcast control signal. The descrambling unit which is electrically connected with the multi-task unit is used for receiving the multi-task digital signal and a control character code and decrypting and descrambling the multi-task digital signal according to the control character code so as to generate a decrypting descrambling signal, and further used for determining whether to transmit the decrypting descrambling signal or not according to the broadcast control signal.

Description

Apparatus for deciphering and descrambling, deciphering and descrambling method and dispositions method
Technical field
The invention relates to a kind of apparatus for deciphering and descrambling, deciphering and descrambling method and dispositions method that is used to receive the digital encryption scrambled broadcast.Particularly, the invention relates to a kind of apparatus for deciphering and descrambling, deciphering and descrambling method and dispositions method in order to deciphering and descrambling one digital signal.
Background technology
Along with the arriving of digital times, the development of television broadcasting also is converted to digital system from traditional analogue system; The television broadcasting of using digital system be the more important thing is the various Additional Services that produced after the digitlization except the more video content of high image quality can be provided.On the other hand, along with the development of digital television broadcasting system is increasingly mature, more feasible many nets fusion architecture that existing communication network, cable TV network, television network broadcast and world-wide web are integrated into a common network becomes the network architecture of following main flow.Thus, except network management, spread signal covering scope are built, simplified to the cloth that can reduce base communication device, more can further integrate respective services, the abundanter value added type service of deriving, further lifting information is utilized level.
In response to the development of digital broadcast television broadcast system and the implementation of many nets fusion architecture, as also emerging rapidly in large numbersBamboo shoots after a spring rain, end product miscellaneous appears on the market.Yet, along with popularizing of digital signal and various end products, the service supplier no longer obtains interests by mode from advertising expenditure to advertiser that collect, but then to the user directly collect watch the digital audio-video content fee with and the mode of value added service expense obtain interests.Therefore, interactive paying type digital audio-video and data content have become the trend that following service supplier provides service, thereby the user must be by payment transaction and digital audio-video and the data content that could watch its purchase by the mode of authentication in end product.
In order to realize that above-mentioned paying watches the mechanism of digital audio-video and data content, end product supplier must cooperate with the service supplier.See also Fig. 1, it is a schematic diagram of describing an end product.Generally speaking, end product 1 comprises a receiving system 11 and a playing device 12, and wherein receiving system 11 electrically connects with playing device 12, and comprises a receiving element 11a, a microcontroller (Micro control unit; MCU) a descrambling unit 11b and a deciphering chip 11c, receiving element 11a and deciphering chip 11c electrically connect with microcontroller descrambling unit 11b respectively.
The user is after choosing digital audio-video/data content of desiring to watch, the service supplier just sends encryption (Encrypt) scrambling (Scramble) signal 100 that comprises this digital audio-video/data content, receiving system 11 receives by receiving element 11a and encrypts scrambled signals 100, and will encrypt scrambled signals 100 and be sent to microcontroller descrambling unit 11b.Then, microcontroller descrambling unit 11b captures a key signal 101 from encrypting in the scrambled signals 100, and key signal 101 is sent to deciphering chip 11c.Deciphering chip 11c just produces a control word (Control word) 110 according to key signal 101, and control word 110 is sent to microcontroller descrambling unit 11b.Subsequently, microcontroller descrambling unit 11b just encrypts scrambled signals 100 according to control word 110 deciphering (Decrypt) descramblings (Descramble), producing a deciphering and descrambling signal 102, and deciphering and descrambling signal 102 is sent to playing device 12.At last, end product 1 is play deciphering and descrambling signals 102 by playing device 12, but wherein deciphering and descrambling signal 102 is one to comprise the play signal of this digital audio-video/data content.
Based on above-mentioned digital audio-video/data content presentation mode, end product must possess the function of encryption scrambled signals stream being carried out deciphering and descrambling.In the prior art, be to finish, only belong to than complex calculations that deciphering chip on the market all can't be in order to carry out the descrambling computing at present because of the descrambling computing by the deciphering chip that disposes in the receiving system in order to carry out the required control word of descrambling computing.Therefore, that receiving system must additional configuration one special use or carry out the descrambling computing with shared microcontroller descrambling unit or the microprocessor descrambling unit of other function.Thus, the hardware cost of end product will significantly be increased.On the other hand, when using microcontroller descrambling unit or microprocessor descrambling unit to carry out the descrambling computing, then must write a program in addition and it is installed on the playing device, to drive and to link aforesaid microcontroller descrambling unit or microprocessor descrambling unit, also will significantly increase the complexity of end product.
The file format standard that must meet in addition, playing device via the store files form behind aforesaid microcontroller/microprocessor descrambling unit deciphering and descrambling.For example, when playing device is one to use Windows to operate the computer of little system, then must meets and can be used in Direct show or Directplay multimedia platform under the Windows operating system via the file format of the digital audio-video content behind aforesaid microcontroller/microprocessor descrambling unit deciphering and descrambling.Thus, end product supplier certainly will will write a particular application in addition, with the digital audio-video content behind the aforesaid microcontroller of keyholed back plate/microprocessor descrambling unit deciphering and descrambling, but the file format of aforementioned digital audio-video content is converted to Direct show or the digital audio-video content of Direct play multimedia platform and the file format of additional distinctive keyholed back plate that meets under the Windows operating system, so can produce the compatibility issue of changing between file format, also will increase the software design cost of end product.
On the other hand, in prior art, end product is decrypted descrambling for directly encrypting scrambled signals to one by receiving system, and subsequently the signal behind the deciphering and descrambling is sent to playing device, to carry out the broadcast of digital audio-video/data content.Only the signal because of receiving system output is a deciphering and descrambling signal, and the user can pass through the mode of the deciphering and descrambling signal of acquisition receiving system output, carry out the broadcast of digital audio-video/data content in arbitrary playing device with playing function.Thus; as long as single user charge is also chosen after one digital audio-video/data content; aforementioned digital audio-video/data content can be offered other unpaid users, make that this digital audio-video/data content can't be protected effectively, and then produce leak and loss in the charge.
In sum, how to provide one not need additionally to increase hardware element and reduce the software design cost, and can effectively protect the end product of digital content, the real problem of needing solution for the operator in this field badly.
Summary of the invention
A purpose of the present invention is to provide a kind of apparatus for deciphering and descrambling that is used to receive the digital encryption scrambled broadcast.This apparatus for deciphering and descrambling comprises one first coffret and a multiplex (MUX)/separate multiplex module.This multiplex (MUX)/separate multiplex module more comprises separates a multiplex (MUX) unit and a descrambling unit.This first coffret is in order to receive a digital signal.This separates the multiplex (MUX) unit and this first coffret electrically connects, and in order to separate this digital signal of multiplex (MUX) (Demultiplex), separates multiplex's digital signal to produce one, and produces a Play Control signal according at least one cipher key calculation.This descrambling unit and this are separated the multiplex (MUX) unit and are electrically connected, separate a multiplex's digital signal and a control word (Controlword) in order to receive this, and this separates multiplex's digital signal to decipher (Decrypt) descrambling (Descramble) according to this control word, producing a deciphering and descrambling signal, and whether transmit this deciphering and descrambling signal according to this Play Control signal deciding.
Another object of the present invention is to provide a kind of deciphering and descrambling method that is used to receive the apparatus for deciphering and descrambling of digital encryption scrambled broadcast.This apparatus for deciphering and descrambling comprises one first coffret and a multiplex (MUX)/separate multiplex module.This multiplex (MUX)/separate multiplex module comprises separates a multiplex (MUX) unit and a descrambling unit, this separates the multiplex (MUX) unit and this first coffret electrically connects, this descrambling unit and this are separated the multiplex (MUX) unit and are electrically connected, and this deciphering and descrambling method comprises the following step: (a) make this first coffret receive a digital signal; (b) make this separate the multiplex (MUX) unit and separate this digital signal of multiplex (MUX), separate multiplex's digital signal to produce one, and produce a Play Control signal according at least one cipher key calculation; And (c) make this descrambling unit receive this separating a multiplex's digital signal and a control word, and according to this control word deciphering and descrambling this separates multiplex's digital signal, producing a deciphering and descrambling signal, and whether transmit this deciphering and descrambling signal according to this Play Control signal deciding.
Another purpose of the present invention is to provide a kind of dispositions method of deciphering and descrambling one digital signal.This dispositions method is suitable can be used with an apparatus for deciphering and descrambling and signal receiving device collocation.This apparatus for deciphering and descrambling and this signal receiving device electrically connect, and this dispositions method comprises the following step: (a) make this apparatus for deciphering and descrambling receive this digital signal; (b) make this signal receiving device receive at least one key; (c) make this signal receiving device calculate a control word according to this an at least one key and an algorithm; (d) make this signal receiving device that this control word is sent to this apparatus for deciphering and descrambling; And (e) make this apparatus for deciphering and descrambling receive this control word, and according to this this digital signal of control word deciphering and descrambling, to produce a deciphering and descrambling signal.
A further object of the present invention is to provide a kind of computer program product, a kind of program that is used for the deciphering and descrambling method of an apparatus for deciphering and descrambling of interior storage, and this apparatus for deciphering and descrambling comprises one first coffret and a multiplex (MUX)/separate multiplex module.This multiplex (MUX)/separate multiplex module comprises separates a multiplex (MUX) unit and a descrambling unit, this separates the multiplex (MUX) unit and this first coffret electrically connects, this descrambling unit and this are separated the multiplex (MUX) unit and are electrically connected, this program is carried out after being written into this apparatus for deciphering and descrambling via a computer: a program command A makes this first coffret receive a digital signal; One program command B makes this separate the multiplex (MUX) unit and separates this digital signal of multiplex (MUX), separates multiplex's digital signal to produce one, and produces a Play Control signal according at least one cipher key calculation; An and program command C, make this descrambling unit receive this and separate a multiplex's digital signal and a control word, and according to this control word deciphering and descrambling this separates multiplex's digital signal, producing a deciphering and descrambling signal, and whether transmit this deciphering and descrambling signal according to this Play Control signal deciding.
In sum, apparatus for deciphering and descrambling of the present invention receives a digital signal by one first coffret, then separate this digital signal of multiplex (MUX) by separating the multiplex (MUX) unit with one of this first coffret electric connection, at last, separate a multiplex's digital signal and a control word by receiving this with this descrambling unit of separating the electric connection of multiplex (MUX) unit, and according to this control word deciphering and descrambling this separates multiplex's digital signal, to produce a deciphering and descrambling signal.Thus, the deciphering and descrambling computing of digital signal can be carried out by apparatus for deciphering and descrambling, do not need additional configuration one microcontroller in the signal receiving device of prior art/microprocessor descrambling unit, also do not need in apparatus for deciphering and descrambling, to write a particular application with the digital audio-video/data content of keyholed back plate behind microcontroller/microprocessor descrambling unit deciphering and descrambling.In other words, the present invention can overcome the shortcoming that prior art needs the extra cost that increases hardware element and software design, can't effectively protect the compatibility issue of changing between digital content and file format.
After consulting execution mode graphic and that describe subsequently, this technical field has knows that usually the knowledgeable just can understand other purpose of the present invention, and technological means of the present invention and enforcement aspect.
Description of drawings
Fig. 1 is a schematic diagram of describing an existing end product;
Fig. 2 A is the schematic diagram of the apparatus for deciphering and descrambling of first embodiment of the invention;
Fig. 2 B is the schematic diagram of the apparatus for deciphering and descrambling of second embodiment of the invention;
Fig. 2 C is the schematic diagram of the apparatus for deciphering and descrambling of third embodiment of the invention;
Fig. 2 D is the schematic diagram of the apparatus for deciphering and descrambling of fourth embodiment of the invention;
Fig. 3 is the schematic diagram of the signal receiving device of first embodiment of the invention; And
Fig. 4 is the flow chart of fifth embodiment of the invention.
[main element symbol description]
1: end product 100: encrypt scrambled signals
101: key signal 102: the deciphering and descrambling signal
11: receiving system 11a: receiving element
11b: microcontroller descrambling unit 11c: deciphering chip
110: control word 12: playing device
2a: apparatus for deciphering and descrambling 2b: apparatus for deciphering and descrambling
2c: apparatus for deciphering and descrambling 2d: apparatus for deciphering and descrambling
Coffret 22 in 21: the first: multiplex (MUX)/separate multiplex module
22a: separate multiplex (MUX) unit 22b: the descrambling unit
22c: acquisition unit 22d: multiplex (MUX) unit
220a: data-signal 220a1: control data signal
220b: data-signal 222a: audio signal
222b: audio signal 224a: vision signal
224b: vision signal 226: key
227a: Play Control signal 227b: Play Control signal
227c: Play Control signal 228a: multiplex's digital signal
228b: multiplex's digital signal 228c: multiplex's digital signal
23: storage control unit 230a: the Standard File Format signal
230b: Standard File Format signal 230c: Standard File Format signal
24: storage element 25: decompression unit
250: data-signal 252: audio signal
254: vision signal 26: broadcast unit
27: receiving element 270: key
272: digital signal 3: signal receiving device
300: digital broadcast signal 302: digital broadcast signal
304: digital broadcast signal 306: digital signal
308: digital signal 31: antenna
32: filter 33: tuner
34: demodulator 35: bridger
36: decrypting device 360: control word
360: control word
Embodiment
Below will explain content of the present invention by embodiment, embodiments of the invention are not must can implement as the described any particular environment of embodiment, application or particular form in order to restriction the present invention.Therefore, only be explaination purpose of the present invention about the explanation of embodiment, but not in order to restriction the present invention.Must the expositor, following examples and graphic in, omit and do not illustrate with the non-directly related element of the present invention.
The first embodiment of the present invention is an apparatus for deciphering and descrambling 2a, and its schematic diagram is depicted among Fig. 2 A.Apparatus for deciphering and descrambling 2a comprises one first coffret 21, a multiplex (MUX)/separate multiplex module 22, a storage control unit 23, a storage element 24, a decompression unit 25 and a broadcast unit 26, and multiplex (MUX)/separate multiplex module 22 more comprises separates multiplex (MUX) unit 22a, a descrambling unit 22b, an acquisition unit 22c and a multiplex (MUX) unit 22d.Wherein, separate multiplex (MUX) unit 22a and 21 electric connections of first coffret; Descrambling unit 22b with separate multiplex (MUX) unit 22a and electrically connect; Acquisition unit 22c is respectively with first coffret 21 and separate multiplex (MUX) unit 22a and electrically connect; Multiplex (MUX) unit 22d respectively with first coffret 21, separate multiplex (MUX) unit 22a and descrambling unit 22b and electrically connect; Storage control unit 23 respectively with separate multiplex (MUX) unit 22a and multiplex (MUX) unit 22d and electrically connect; Storage element 24 electrically connects with storage control unit 23; Decompression unit 25 electrically connects with descrambling unit 22b; And broadcast unit 26 electrically connects with decompression unit 25.In present embodiment, apparatus for deciphering and descrambling 2a is a computer, but in other embodiment, apparatus for deciphering and descrambling 2a also can be a mobile phone or other can not limit the scope of the invention with this in order to the device of deciphering and descrambling one digital signal.
Apparatus for deciphering and descrambling 2a of the present invention is in order to deciphering and descrambling one digital signal, and its suitable can collocation with a signal receiving device 3 is used.Signal receiving device 3 electrically connects with apparatus for deciphering and descrambling 2a, and its schematic diagram is depicted among Fig. 3.Signal receiving device 3 comprises an antenna 31, a filter 32, a tuner 33, a demodulator 34, a bridger 35, a decrypting device 36 and one second coffret 37.Wherein antenna 31 electrically connects with filter 32; Filter 32 electrically connects with tuner 33; Tuner 33 electrically connects with demodulator 34; Demodulator 34 and decrypting device 36 electrically connect with bridger 35 respectively; The bridger 35 and second coffret 37 electrically connect; Second coffret 37 electrically connects with first coffret 21 of apparatus for deciphering and descrambling 2a.
In present embodiment, signal receiving device 3 is connected to apparatus for deciphering and descrambling 2a by an outside connected mode, that is signal receiving device 3 is an external device.But in other embodiment, signal receiving device 3 also can be connected with apparatus for deciphering and descrambling 2a by an inner connecting way, that is signal receiving device 3 can be the device that is built among the apparatus for deciphering and descrambling 2a, does not limit the scope of the invention with this.
See also Fig. 3, antenna 31 is in order to receiving a digital broadcast signal 300, and digital broadcast signal 300 is sent to filter 32.Filter 32 is in order to filtering the signal that meets receive frequency range in the digital broadcast signal 300, producing a digital broadcast signal 302, and digital broadcast signal 302 is sent to tuner 33.For example, filter 32 is in order to filtering out uhf band signal, VHF frequency band signals, S frequency band signals or the Ku frequency band signals etc. in the digital broadcast signal 300, and the frequency range that institute's desire receives when looking closely practical application and deciding does not limit the scope of the invention with this.
Tuner 33 is in order to frequency tuning to a fundamental frequency (Baseband) frequency of the digital broadcast signal 302 that will be received, producing a digital broadcast signal 304, and digital broadcast signal 304 is sent to demodulator 34.Then, demodulator 34 is in order to demodulation parameter word broadcast singal 304, and produces a digital signal 306, and demodulator 34 is sent to bridger 35 with digital signal 306 subsequently.35 of bridgers are in order to be converted to an input signal one output signal that meets the interface format of second coffret 37.In this embodiment, be about to digital signal 306 and be converted to a digital signal 308 that meets the interface format of second coffret 37, then, bridger 35 is sent to second coffret 37 with digital signal 308.At last, apparatus for deciphering and descrambling 2a passes through first coffret 21 from second coffret, 37 receiving digital signals 308.Wherein second coffret 37 and first coffret 21 can be USB2.0 interface, PC Card interface, Express Card interface, pci interface, miniCard interface and PCIExpress interface wherein one, or other data transmission interface, do not limit the scope of the invention with this.
The person of should be specified, digital signal 308 can be one and meets broadcasting driver framework (Broadcast DriverArchitecture; BDA) signal, and comprise a video (Video) signal, an audio frequency (Audio) signal and data (Data) signal.Generally speaking, digital signal provider can carry out the encryption and the scrambling processing of signal by encrypting (Encrypt) and scrambling (Scramble) technology in order to protect the content of digital signal to the digital signal that it sent.In other words, digital signal 308 is an encryption scrambled signals.And in order to improve efficiency of transmission, signal provider more can carry out digital signal one multiplex (MUX) (Multiplex) further and handle, to form a single signal flow.Digital signal after the multiplex (MUX) handles comprises a plurality of multiplex's frames (Multiplexframe), each multiplex's frame more can comprise a plurality of multiplex's subframes (Multiplex subframe) further, then comprises vision signal, audio signal and data-signal in each multiplex's subframe.
Please consult Fig. 2 A simultaneously, first coffret 21 just is sent to digital signal 308 and separates multiplex (MUX) unit 22a behind receiving digital signals 308.Separate multiplex (MUX) unit 22a and then separate multiplex (MUX) (Demultiplex) digital signal 308, and produce one and separate multiplex's digital signal.Wherein this is separated multiplex's digital signal and comprises a data-signal 220a, an audio signal 222a and a vision signal 224a, and data-signal 220a, audio signal 222a and vision signal 224a are respectively one and encrypt scrambled signals.What must be illustrated is that the multiplex (MUX) of separating of the present invention is meant, solves multiplex's frame in a digital signal, and solves a plurality of multiplex's subframes further in this multiplex's frame; Perhaps, in a digital signal, solve a plurality of multiplex's frames, and in each multiplex's frame, solve a plurality of multiplex's subframes further, last, in each multiplex's subframe, capture data-signal and video-audio signal.
Wherein, comprise a control data signal 220a1 and a played data signal among the data-signal 220a.Control data signal 220a1 more comprises a key 226, and key 226 is in order to the calculation control character code, and the account form of control word will further specify in following paragraph.In behind descrambling unit 22b deciphering and descrambling, this played data signal is the signal that can play, and more comprises a non-compressed signal and a compressed signal.This non-compressed signal is not compressed signal, therefore can directly be played unit 26 and play; This compressed signal then is a compressed signal, begins to be played unit 26 after must decompressing via decompression unit 25 earlier and plays.
In present embodiment, key 226 further comprises a program current cipher key and a business cipher key, wherein, this program current cipher key is in order to encrypt the program stream that is sent from a signal source (as broadcast television signal source, world-wide web signal source and communication network signal source etc.).For example, program current cipher key is key in order to encrypted data signal 220a, audio signal 222a and vision signal 224a in present embodiment; This business cipher key for the service provider in order to encrypt the business tine that it provides, it is for to order the successful service authorization key about the specific user.In other embodiment, key 226 more can comprise other one or more can be in order to the key of calculation control character code, not with the restricted number of key scope of the present invention.
Need special instruction person, this business cipher key gets for the service provider calculates according to one or more business cipher key operational factors.For example, in present embodiment, these business cipher key operational factors comprise: (1) one chip keys (Chip ID) factor, chip keys claims user's key (User key) again, chip keys writes in the decrypting device by a chip supplier in advance, each decrypting device all has a unique chip keys, in order to the employed decrypting device of identification user.For example, chip keys can be unique identification card number (as ABC-110-01, ABC-372-17, DEF-230-22 etc.) of a decrypting device, and calculating the business cipher key that gets according to the chip keys factor can be in order to judge whether a terminal equipment with this decrypting device is legal subscriber; Capacity factors in (2) one, the business tine of ordering about the user (video content of ordering as the user) is calculated the business cipher key that gets according to interior capacity factor and can whether have been ordered specific business tine in order to judge a user; (3) the one time to live factors, one business cipher key can be set an effective time to live (as month), in this effective time to live, this business cipher key is effective, and can be in order to the calculation control character code, if surpassed this effective time to live, this business cipher key is invalid, and can't therefore calculate the business cipher key that gets and promptly have an effective time to live in order to the calculation control character code according to the time to live factor; And (4) one user cipher factors, be user's password that a user sets up on their own, calculate according to the user cipher factor whether the business cipher key that gets can be legal user in order to judge a user.Except four kinds of above-mentioned business cipher key operational factors, in other embodiment, the service provider more can be according to other one or more business cipher key operational factor computing service keys, look closely the practical application mode and determine, do not limit the scope of the invention with this.
After producing data-signal 220a, audio signal 222a and vision signal 224a, separate multiplex (MUX) unit 22a and then the control data signal 220a1 among the data-signal 220a is sent to acquisition unit 22c.Acquisition unit 22c just captures key 226 from controlling, and by first coffret 21, second coffret 37 and bridger 35 key 226 is sent to decrypting device 36 after receiving control data signal 220a1 among the data-signal 220a1.Decrypting device 36 after receiving key 226, just according to unique user's key of key 226 and decrypting device 36 itself with an algorithm (Advanced Encryption Standard Algorithm for example; The AES algorithm) is decrypted computing.In present embodiment, decrypting device 36 is decrypted computing with the AES algorithm, and in other embodiment, decrypting device 36 can also other one or more algorithms be decrypted computing, and the kind of algorithm and quantity are not in order to limit the scope of the invention.Decrypting device 36 can produce a control word (Control Word) 360 after finishing decrypt operation, and by bridger 35, second coffret 37 and first coffret 21 control word 360 is sent to and separates multiplex (MUX) unit 22a.
In other embodiment, decrypting device 36 more can be decrypted computing according to a value added service key with an algorithm simultaneously further except being decrypted the computing with an algorithm according to a key.Particularly, decrypting device 36 more can receive a value added service key (figure does not illustrate), and calculates generation one control word according to this key and this value added service key with an algorithm.Wherein, the value added service content that this value added service key provides in order to encrypt it for the service provider, it is for to order successful value added service authorization key about the specific user.As previously mentioned, this value added service key gets for the service provider calculates according to one or more value added service key operational factors, and these value added service key operational factors comprise: (1) one chip keys (Chip ID) factor; Capacity factor in (2) one; (3) the one time to live factors and (4) the one user cipher factors.The quantity of value added service key operational factor and kind are looked closely the practical application mode and are determined, do not limit the scope of the invention with this.
Decrypting device 36 is except can be according to above-mentioned key and the value added service cipher key calculation control word, in other embodiment, decrypting device 36 more can one or morely can go out control word in order to the cipher key calculation of calculation control character code according to other, in view of the above, in order to the key kind of calculation control character code and number of keys not in order to limit the scope of the invention.
The person of should be specified, the value added service key can receive from a service provider by receiving system 2, perhaps, can obtain from a signal source (as broadcast television signal source, world-wide web signal source and communication network signal source etc.) by the receiving element (figure does not illustrate) of apparatus for deciphering and descrambling 2a.
Separate multiplex (MUX) unit 22a after separating the multiplex (MUX) and going out data-signal 220a, audio signal 222a and vision signal 224a, further in data-signal 220a, separate the multiplex (MUX) and go out a program current cipher key and a business cipher key, then separate multiplex (MUX) unit 22a and just calculate a Play Control signal 227a according to this program current cipher key and this business cipher key.Wherein, but whether Play Control signal 227a is authorized play signal in order to verification msg signal 220a, audio signal 222a and vision signal 224a.
In other embodiment, separating multiplex (MUX) unit 22a more can be further according to a value added service cipher key calculation one Play Control signal, promptly separate multiplex (MUX) unit 22a according to a program current cipher key, a business cipher key and a value added service cipher key calculation one Play Control signal, as previously mentioned, but this Play Control signal in order to verify whether a data-signal, an audio signal and a vision signal are authorized play signal.
Separate multiplex (MUX) unit 22a except can be according to above-mentioned program current cipher key, business cipher key and the value added service cipher key calculation Play Control signal, in other embodiment, separate multiplex (MUX) unit 22a and more can one or morely can go out the Play Control signal according to other in order to the cipher key calculation of calculating the Play Control signal, in view of the above, in order to the key kind of calculating the Play Control signal and number of keys not in order to limit the scope of the invention.
Separate multiplex (MUX) unit 22a after receiving control word 360, just data-signal 220a, audio signal 222a, vision signal 224a, control word 360 and Play Control signal 227a are sent to descrambling unit 22b.Descrambling unit 22b is according to control word 360 deciphering (Decrypt) descrambling (Descramble) data-signal 220a, audio signal 222a and vision signal 224a, and produce a data-signal 220b, an audio signal 222b and a vision signal 224b respectively, wherein data-signal 220b, audio signal 222b and vision signal 224b are respectively a deciphering and descrambling signal.
What must illustrate is, but descrambling unit 22b have only according to and data-signal 220a, audio signal 222a and vision signal 224a corresponding one correct control word just deciphering and descrambling data-signal 220a, audio signal 222a and vision signal 224a, this correct control word is got according to the unique user's key of decrypting device 36 own, business cipher key and with data-signal 220a, audio signal 222a and the corresponding program current cipher key computing of vision signal 224a by decrypting device 36.If this control word is not for being applicable to the control word of data-signal 220a, audio signal 222a and vision signal 224a, then the control word that calculated of decrypting device 36 is just non-is a correct control word, and then descrambling unit 22b can't be according to this non-correct control word deciphering and descrambling data-signal 220a, audio signal 222a and vision signal 224a.In addition, descrambling unit 22b is in producing data-signal 220b, behind audio signal 222b and the vision signal 224b, more can be further according to Play Control signal 227a to judge whether with data-signal 220b, audio signal 222b and vision signal 224b are sent to decompression unit 25, particularly, represent data-signal 220a if separate the Play Control signal 227a that multiplex (MUX) unit 22a calculated, but audio signal 222a and vision signal 224a are authorized play signal, and then descrambling unit 22b just is sent to decompression unit 25 with the signal behind the deciphering and descrambling; On the contrary, but represent that data-signal 220a, audio signal 222a and vision signal 224a are non-and be authorized play signal that then descrambling unit 22b just can not be sent to the signal behind the deciphering and descrambling decompression unit 25 if separate Play Control signal 227a that multiplex (MUX) unit 22a calculated.By this mode, apparatus for deciphering and descrambling of the present invention can effectively be protected and the signal content of play signal that keyholed back plate is desired.
Descrambling unit 22b is after being sent to decompression unit 25 with data-signal 220b, audio signal 222b and vision signal 224b.Decompression unit 25 is decompression (Decompress) data-signal 220b then, to produce a data-signal 250; Uncompressed audio signal 222b is to produce an audio signal 252; Decompressed video signal 224b is to produce a vision signal 254.Wherein, data-signal 250, audio signal 252 and vision signal 254 are respectively a decompressed signal.
At last, decompression unit 25 is sent to broadcast unit 26 with data-signal 250, audio signal 252 and vision signal 254 respectively.Broadcast unit 26 is played data signal 250, audio signal 252 and vision signal 254 just.Wherein, broadcast unit 26 can be an audio unit, display unit or other can not limit the scope of the invention with this in order to play the device of decompressed signal.
In addition, in practical application,,, also has the demand that stores this digital broadcast signal except playing this digital broadcast signal by apparatus for deciphering and descrambling of the present invention when the user receives a digital broadcast signal.For example, when this digital broadcast signal is a program, then this user after receiving this program, but except this program of direct viewing, also may wish to record this program, watch for repeat playing in the future.Therefore, apparatus for deciphering and descrambling of the present invention more will further provide the function of a store digital broadcast singal.Structure and the running of apparatus for deciphering and descrambling of the present invention in order to the store digital broadcast singal below will be described in detail in detail.
Apparatus for deciphering and descrambling of the present invention can store the signal of three kinds of different-formats, and the signal that desire stores must carry out a multiplex (MUX) by multiplex (MUX) unit 22d earlier to be handled, to meet 23 signal formats that can store of storage control unit.See also Fig. 2 A, multiplex (MUX) unit 22d is electrically connected to first coffret 21 respectively, separates multiplex (MUX) unit 22a and descrambling unit 22b, and the signal that stores in order to multiplex (MUX) (Multiplex) institute desire is single data flow.Therefore, apparatus for deciphering and descrambling can store the signal that produced by first coffret 21 respectively, by the signal of separating signal that multiplex (MUX) unit 22a produced and being produced by descrambling unit 22b one of them or its combination.What must illustrate is, apparatus for deciphering and descrambling of the present invention can be in order to store the signal of three kinds of different-formats, only when practical application, can select to store these three kinds of signals one of them or its combination, look closely the practical application situation and determine, therefore do not limit the signal that the present invention need store these three kinds of different-formats simultaneously.The storing mode of these three kinds of different-format signals will further specify in following paragraph.
One, when first coffret 21 after receiving digital signals 308, just digital signal 308 is sent to multiplex (MUX) unit 22d.On the other hand, after separating multiplex (MUX) unit 22a generation Play Control signal 227a, separate multiplex (MUX) unit 22a and also Play Control signal 227a is sent to multiplex (MUX) unit 22d.Multiplex (MUX) unit 22d follows multiplex's digital signal 308 and Play Control signal 227a, producing multiplex's digital signal 228a, and multiplex's digital signal 228a is sent to storage control unit 23.Storage control unit 23 is compiling (Compile) multiplex (MUX) digital signal 228a then, makes it become a Standard File Format signal 230a, and Standard File Format signal 230a is sent to storage element 24.Storage element 24 then receives and storage standard file format signal 230a at last, and this promptly stores the mode of the signal that first coffret 21 produced.
Its two, when separating after multiplex (MUX) unit 22a separates multiplex's digital signal 308, will produce data-signal 220a, audio signal 222a, vision signal 224a and Play Control signal 227a.Then, separate multiplex (MUX) unit 22a data-signal 220a, audio signal 222a, vision signal 224 and Play Control signal 227a are sent to multiplex (MUX) unit 22d.Multiplex (MUX) unit 22d follows multiplex's data-signal 220a, audio signal 222a, vision signal 224a and Play Control signal 227a, producing multiplex's digital signal 228b, and multiplex's digital signal 228b is sent to storage control unit 23.Storage control unit 23 then compiles multiplex's digital signal 228b, makes it become a Standard File Format signal 230b, and Standard File Format signal 230b is sent to storage element 24.At last, storage element 24 receives and storage standard file format signal 230b, and this promptly stores by the mode of separating the signal that multiplex (MUX) unit 22a produced.
At last, after descrambling unit 22b deciphering and descrambling data-signal 220a, audio signal 222a and vision signal 224a, will produce data-signal 220b, audio signal 222b and vision signal 224b.Descrambling unit 22b is sent to multiplex (MUX) unit 22d with data-signal 220b, audio signal 222b and vision signal 224b.Owing to do not comprise control data signal 220a1 among the data-signal 220b; and data-signal 220b, audio signal 222b and vision signal 224b are all the signal of deciphering and descrambling; therefore in order effectively to protect its signal content when storage data signal 220b, audio signal 222b and the vision signal 224b, must store simultaneously by the Play Control signal 227a that separates the generation that 22a calculates of multiplex (MUX) unit.At this moment, separate multiplex (MUX) unit 22a and Play Control signal 227a can be sent to multiplex (MUX) unit 22d.Multiplex (MUX) unit 22d follows multiplex's data-signal 220b, audio signal 222b, vision signal 224b and Play Control signal 227a, producing multiplex's digital signal 228c, and multiplex's digital signal 228c is sent to storage control unit 23.It is a Standard File Format signal 230c that storage control unit 23 then compiles multiplex's digital signal 228c, and Standard File Format signal 230c is sent to storage element 24.At last, storage element 24 receives and storage standard file format signal 230c, and this promptly stores the mode of the signal that is produced by descrambling unit 22b.
The person of should be specified is no matter the signal that multiplex (MUX) unit 22d is produced all comprises the Play Control signal for the signal of encryption scrambling or the signal of deciphering and descrambling.In other words, even the file that is stored in the storage element 24 suffers that unwarranted user captures, the file that comprises the file of encryption scrambling of Play Control signal and deciphering and descrambling all must be via beginning to such an extent that be played behind the checking Play Control signal, and the mode of checking will be chatted bright in following paragraph.Apparatus for deciphering and descrambling hereat of the present invention can effectively be protected the signal content of stored signal in the time of storage assembly.
Then, following paragraph will be chatted the mode that bright apparatus for deciphering and descrambling of the present invention is play the file that is stored in the encryption scrambling in the storage element 24.At first, storage control unit 23 reads Standard File Format signal 230a from storage element 24, and then compiling Standard File Format signal 230a is multiplex's digital signal 228a, and multiplex's digital signal 228a is sent to separates multiplex (MUX) unit 22a.Separate multiplex (MUX) unit 22a and then separate multiplex (MUX) multiplex's digital signal 228a, to produce data-signal 220a, audio signal 222a, vision signal 224a and Play Control signal 227a.The operation of subsequent calculations control word, deciphering and descrambling, decompression and broadcast is all identical with the described explanation of leading portion, so no longer given unnecessary details at this.
In like manner, storage control unit 23 also can read Standard File Format signal 230b, and compiling Standard File Format signal 230b is multiplex's digital signal 228b, and multiplex's digital signal 228b is sent to separates multiplex (MUX) unit 22a.Separating multiplex (MUX) unit 22a separates multiplex (MUX) multiplex's digital signal 228b and just can produce data-signal 220a, audio signal 222a, vision signal 224a and Play Control signal 227a.The operation of subsequent calculations control word, deciphering and descrambling, decompression and broadcast is all identical with the described explanation of leading portion, so no longer given unnecessary details at this.
In like manner, storage control unit 23 also can read Standard File Format signal 230c, and compiling Standard File Format signal 230c is multiplex's digital signal 228c, and multiplex's digital signal 228c is sent to separates multiplex (MUX) unit 22a.Separate multiplex (MUX) unit 22a and separate multiplex (MUX) multiplex's digital signal 228c and just can produce data-signal 220b, audio signal 222b, vision signal 224b and Play Control signal 227a, and data-signal 220b, audio signal 222b, vision signal 224b and Play Control signal 227a are sent to descrambling unit 22b.Descrambling unit 22b verifies then whether Play Control signal 227a is the signal of playing through authorization grant with determination data signal 220b, audio signal 222b and vision signal 224b.If then designate data signal 220b, audio signal 222b and vision signal 224b are the signal of playing through authorization grant, just descrambling unit 22b is sent to decompression unit 25 with data-signal 220b, audio signal 222b and vision signal 224b; If not, then designate data signal 220b, audio signal 222b and vision signal 224b are non-is the signal of playing through authorization grant, descrambling unit 22b just can not be sent to decompression unit 25 with data-signal 220b, audio signal 222b and vision signal 224b, and promptly data-signal 220b, audio signal 222b and vision signal 224b can't be played.By this with the signal content of effective protected data signal 220b, audio signal 222b and vision signal 224b.Descrambling unit 22b is all identical with the described explanation of leading portion with the operation that data-signal 220b, audio signal 222b and vision signal 224b are sent to decompression behind the decompression unit 25 and broadcast, so no longer given unnecessary details at this.
In the Another Application example, apparatus for deciphering and descrambling of the present invention also can receive a clear stream signal (figure does not illustrate), clear stream signal of the present invention refers to comprise the deciphering and descrambling signal of data-signal, audio signal and vision signal, and wherein data-signal more comprises a control data signal.After a clear stream signal is received by first coffret 21, this clear stream signal is transferred into to be separated multiplex (MUX) unit 22a and separates multiplex's digital signal to produce one, separate multiplex (MUX) unit 22a and then produce a Play Control signal, and this Play Control signal is sent to descrambling unit 22b according to the key in a value added service key and this control data signal.Because this separates multiplex's digital signal is a deciphering and descrambling signal, do not need to be decrypted the descrambling computing by descrambling unit 22b again, therefore, descrambling unit 22b is by verifying that this Play Control signal is to determine whether this clear stream signal is the signal of playing through authorization grant, the mode of checking is identical with aforementioned paragraphs, so no longer given unnecessary details at this.In view of the above, apparatus for deciphering and descrambling of the present invention also can receive a clear stream signal, and whether decision play this clear stream signal, uses the signal that effective keyholed back plate receives and could play in apparatus for deciphering and descrambling, to reach the security maintenance of radio broadcasting.
The storage control unit 23 of present embodiment is time translation (Time shifting) file access device, that is storage control unit 23 can write simultaneously file to storage element 24 with read file from storage element 24.Thus, while just can realize watching the program program recording, soon broadcast program, broadcast the function of program or jump broadcast program.In other embodiment, storage control unit 23 also can be other in order to read file or to write the access controller of file to storage element 24, does not limit the scope of the invention with this.
The second embodiment of the present invention is an apparatus for deciphering and descrambling 2b, and its schematic diagram is depicted among Fig. 2 B.The difference of the apparatus for deciphering and descrambling 2b of second embodiment and the apparatus for deciphering and descrambling 2a of first embodiment be in, apparatus for deciphering and descrambling 2b more comprises a receiving element 27, electrically connects with first coffret 21.Receiving element 27 is in order to receive a key 270, and key 270 is sent to decrypting device 36 by first coffret 21, second coffret 37 and bridger 35, and then decrypting device 36 also can be decrypted computing with an algorithm according to the key 270 that is received from receiving element 27, and produce control word 360 as described in the first embodiment, so that descrambling unit 22b can be according to control word 360 deciphering and descrambling data-signal 220a, audio signal 222a and vision signal 224a.On the other hand, receiving element 27 more is sent to key 270 and separates multiplex (MUX) unit 22a, separate multiplex (MUX) unit 22a and further produce a Play Control signal 227b, so that whether descrambling unit 22b can be sent to decompression unit 25 with data-signal 220a, audio signal 222a behind the deciphering and descrambling and vision signal 224a with decision according to Play Control signal 227b according to key 270.Except above-mentioned difference, second embodiment also can carry out first embodiment the operation described and the function, affiliated technical field have know usually the knowledgeable can be directly acquainted with second embodiment how based on above-mentioned first embodiment to carry out these operations and function, so do not give unnecessary details.
The third embodiment of the present invention is an apparatus for deciphering and descrambling 2c, and its schematic diagram is depicted among Fig. 2 C.The difference of the apparatus for deciphering and descrambling 2c of the 3rd embodiment and the apparatus for deciphering and descrambling 2a of first embodiment be in, apparatus for deciphering and descrambling 2c more comprises a receiving element 27, and separates multiplex (MUX) unit 22a and electrically connects.Receiving element 27 is in order to receiving a digital signal 272 from a signal source, and digital signal 272 is sent to separates multiplex (MUX) unit 22a, but so that apparatus for deciphering and descrambling 2c deciphering and descrambling and play digital signal 272.In present embodiment, receiving element 27 is a network signal R-T unit, comprise wireless type network signal receiving system (as wireless network card, wireless data card etc.) and wired formula network signal receiving system (as RJ-45 interface network card), or other any can be in order to connect the R-T unit of network.This network signal R-T unit can be in order to link to a network, so that apparatus for deciphering and descrambling 2c can receive and send a signal to this network by this network signal R-T unit.In other embodiment, receiving element 27 also can be other and can not limit the scope of the invention with this in order to the device of receiving digital signals.Except above-mentioned difference, the 3rd embodiment also can carry out first embodiment and second embodiment the operation described and the function, under technical field have know usually the knowledgeable can be directly acquainted with the 3rd embodiment how based on above-mentioned first embodiment and second embodiment to carry out these operations and function, so do not give unnecessary details.
The fourth embodiment of the present invention shown in Fig. 2 D, is an apparatus for deciphering and descrambling 2d then.In detail, the difference of the apparatus for deciphering and descrambling 2d of the 4th embodiment and the apparatus for deciphering and descrambling 2a of first embodiment be in, the acquisition unit 22c of apparatus for deciphering and descrambling 2d captures after the key 226 from controlling data-signal 220a1, just key 226 is back to and separates multiplex (MUX) unit 22a.Separate multiplex (MUX) unit 22a and then be sent to descrambling unit 22b with data-signal 220a, audio signal 222a, vision signal 224a and according to the Play Control signal 227c that key 226 calculates generation.Descrambling unit 22b more calculates a control word according to a key 226 and an algorithm, so that descrambling unit 22b can be according to this control word, and deciphering and descrambling data-signal 220a, audio signal 222a and vision signal 224a.Then, whether descrambling unit 22b is sent to decompression unit 25 with data-signal 220b, audio signal 222b behind the deciphering and descrambling and vision signal 224b according to Play Control signal 227c with decision.Except above-mentioned difference, the 4th embodiment also can carry out the 3rd embodiment the operation described and function, affiliated technical field have know usually the knowledgeable can be directly acquainted with the 4th embodiment how based on above-mentioned the 3rd embodiment to carry out these operations and function, so do not give unnecessary details.
The fifth embodiment of the present invention as shown in Figure 4, it is a kind of deciphering and descrambling method that is used for as the described apparatus for deciphering and descrambling of first embodiment.This apparatus for deciphering and descrambling comprises one first coffret, a multiplex (MUX)/separate multiplex module, a storage control unit, a storage element, a decompression unit and a broadcast unit.Multiplex (MUX)/separate multiplex module more comprises separates multiplex (MUX) unit, a descrambling unit, an acquisition unit and a multiplex (MUX) unit.Wherein separating the multiplex (MUX) unit and first coffret electrically connects; The descrambling unit with separate the multiplex (MUX) unit and electrically connect; Acquisition unit is respectively with first coffret and separate the multiplex (MUX) unit and electrically connect; The multiplex (MUX) unit respectively with first coffret, separate multiplex (MUX) unit and descrambling unit and electrically connect; Storage control unit respectively with separate multiplex (MUX) unit and multiplex (MUX) unit and electrically connect; Storage element and storage control unit electrically connect; Decompression unit and descrambling unit electrically connect; And broadcast unit and decompression unit electrically connect.
This apparatus for deciphering and descrambling is in order to deciphering and descrambling one digital signal, and its suitable can collocation with a signal receiving device is used.This signal receiving device and this apparatus for deciphering and descrambling electrically connect, and comprise a decrypting device and one second coffret.Wherein, this first coffret of this second coffret and this apparatus for deciphering and descrambling electrically connects; This decrypting device and this second coffret electrically connect.
In addition, the described deciphering and descrambling method of the 5th embodiment also can be carried out by a computer program product, after playing device is written into this computer program product via an electronic installation (box on as computer, calculator, server, PDA, MP4, MP5, navigator, world-wide web TV box, teaching machine, Smartphone, notebook computer and little pen electricity or the like) and carries out a plurality of program command that this computer program product comprises, can finish the described deciphering and descrambling method of the 5th embodiment.Aforesaid computer program product can be stored in the playing device medium capable of reading record, for example read-only memory (read only memory; ROM), flash memory, floppy disk, hard disk, CD, with oneself dish, storage card, can by the database of network access or have the knack of this skill person known and have in any other Storage Media of identical function.
Fig. 4 describes the flow chart of the deciphering and descrambling method of the 5th embodiment.At first execution in step 401, make first coffret receive a digital signal, and this digital signal is sent to separates the multiplex (MUX) unit.Then, execution in step 402, order is separated the multiplex (MUX) unit and is separated this digital signal of multiplex (MUX), separates multiplex's digital signal to produce one, wherein this is separated multiplex's digital signal and comprises a control data signal, and order is separated the multiplex (MUX) unit and produced a Play Control signal according to this control data signal.Then, execution in step 403 makes acquisition unit receive this control data signal, and captures at least one key in this control data signal certainly.
After capturing this at least one key, then execution in step 404 makes the decrypting device of signal receiving device this at least one key of first coffret reception by second coffret and apparatus for deciphering and descrambling.Continue execution in step 405 again, make the decrypting device of signal receiving device calculate a control word according to this an at least one key and an algorithm.
After the execution of step 405, then execution in step 406 makes the descrambling unit receive this control word by second coffret of first coffret and signal receiving device.Then, execution in step 407 makes the descrambling unit separate multiplex's digital signal according to the control word deciphering and descrambling, and produces a deciphering and descrambling signal, and according to this Play Control signal this deciphering and descrambling signal is sent to decompression unit.Continue execution in step 408 again, make decompression unit this deciphering and descrambling signal that decompresses, to produce a decompressed signal.At last, execution in step 409 makes broadcast unit play decompressed signal.
Except above-mentioned steps, this deciphering and descrambling method more can comprise one and be executed in step 401 step before, and this step makes signal receiving device receive this digital signal.Wherein, first coffret of apparatus for deciphering and descrambling receives this digital signal by second coffret of signal receiving device.
In addition, aforesaid deciphering and descrambling method more can comprise make this digital signal of multiplex (MUX) unit multiplex (MUX), this separates multiplex's digital signal and this deciphering and descrambling signal one of them or its combination, to produce a step of multiplex's digital signal.Make storage control unit this multiplex's digital signal is compiled as a step of a Standard File Format signal.Make storage element receive and store a step of this Standard File Format signal, wherein this multiplex's digital signal can be one encrypt a scrambled signals and a deciphering and descrambling signal one of them, or its combination, and all comprise a Play Control signal.Make storage control unit read this Standard File Format signal, this Standard File Format signal is compiled as this multiplex's digital signal, and this multiplex's digital signal is sent to a step of separating the multiplex (MUX) unit from storage element.And order is separated the multiplex (MUX) unit and is separated this multiplex's digital signal of multiplex (MUX), to produce the step that this separates multiplex's digital signal.
In other embodiment, apparatus for deciphering and descrambling more comprises a receiving element that electrically connects with this first coffret.At this moment, aforesaid deciphering and descrambling method more comprises a step that makes this receiving element receive this at least one key; Make the decrypting device of signal receiving device receive a step of this at least one key by first coffret of second coffret and apparatus for deciphering and descrambling; The step that the multiplex (MUX) unit receives a key by receiving element and produces a Play Control signal according to this key is separated in order; And, make the descrambling unit whether the data-signal behind the deciphering and descrambling, audio signal and vision signal are sent to a step of decompression unit with decision according to the Play Control signal.
In another embodiment, apparatus for deciphering and descrambling more comprises with this separates the receiving element that the multiplex (MUX) unit electrically connects.At this moment, aforesaid deciphering and descrambling method more comprises a step that makes this receiving element receive this digital signal.
In another embodiment, aforesaid deciphering and descrambling method more comprises a step that makes this descrambling unit calculate this control word according to an at least one key and an algorithm.And, make the descrambling unit whether the data-signal behind the deciphering and descrambling, audio signal and vision signal are sent to a step of decompression unit with decision according to the Play Control signal.
Except above-mentioned steps, the 5th embodiment also can carry out first embodiment the operation described and the function, affiliated technical field have know usually the knowledgeable can be directly acquainted with the 5th embodiment how based on above-mentioned first embodiment to carry out these operations and function, so do not give unnecessary details.
In sum, the present invention is by the apparatus for deciphering and descrambling signal receiving device of arranging in pairs or groups, in this apparatus for deciphering and descrambling deciphering and descrambling one digital signal.This signal receiving device is in order to receiving this at least one key, and calculates a control word according to this an at least one key and an algorithm, and this control word is sent to this apparatus for deciphering and descrambling.Whether this apparatus for deciphering and descrambling promptly according to this this digital signal of control word deciphering and descrambling, producing a deciphering and descrambling signal, and transmits this deciphering and descrambling signal according to a Play Control signal with decision after receiving this control word.Then, this apparatus for deciphering and descrambling this deciphering and descrambling signal that decompresses is to produce a decompressed signal.At last, this apparatus for deciphering and descrambling is play this decompressed signal by a broadcast unit.
Thus, by apparatus for deciphering and descrambling of the present invention, manufacturer does not need additional configuration one microcontroller in signal receiving device/microprocessor descrambling unit, also do not need in apparatus for deciphering and descrambling, to write an application program with the digital audio-video/data content of keyholed back plate behind microcontroller/microprocessor descrambling unit deciphering and descrambling, can finish the deciphering and descrambling computing of digital signal, and further whether keyholed back plate plays signal behind deciphering and descrambling.In other words, the present invention can overcome the shortcoming that prior art needs the extra cost that increases hardware element and software design, can't effectively protect the compatibility issue of changing between digital content and file format.
The above embodiments only are used for exemplifying enforcement aspect of the present invention, and explain technical characterictic of the present invention, are not to be used for limiting protection category of the present invention.Any be familiar with this operator can unlabored change or the arrangement of the isotropism scope that all belongs to the present invention and advocated, the scope of the present invention should be as the criterion with claim.

Claims (34)

1. apparatus for deciphering and descrambling comprises:
One first coffret is in order to receive a digital signal; And
One multiplex (MUX)/separate multiplex module comprises:
One separates the multiplex (MUX) unit, electrically connects with this first coffret, in order to separate this digital signal of multiplex (MUX), separates multiplex's digital signal to produce one; And
One descrambling unit is separated the multiplex (MUX) unit with this and is electrically connected, and in order to receiving a control word, and this separates multiplex's digital signal according to this control word deciphering and descrambling, to produce a deciphering and descrambling signal.
2. apparatus for deciphering and descrambling as claimed in claim 1, it is characterized in that, this multiplex (MUX)/separate multiplex module more comprises a multiplex (MUX) unit, this apparatus for deciphering and descrambling more comprises a storage control unit and a storage element, this multiplex (MUX) unit respectively with this first coffret, this separates the multiplex (MUX) unit and this descrambling unit electrically connects, in order to this digital signal of multiplex (MUX), this separates multiplex's digital signal and this deciphering and descrambling signal, to produce multiplex's digital signal, this storage control unit electrically connects with this multiplex (MUX) unit and this storage element respectively, in order to this multiplex's digital signal is compiled as a Standard File Format signal, this storage element receives and stores this Standard File Format signal.
3. apparatus for deciphering and descrambling as claimed in claim 2, it is characterized in that, this storage control unit is more separated the multiplex (MUX) unit with this and is electrically connected, read this Standard File Format signal in order to this storage element certainly, this Standard File Format signal is compiled as this multiplex's digital signal, and this multiplex's digital signal is sent to this separates the multiplex (MUX) unit, this separates the multiplex (MUX) unit in order to separate this multiplex's digital signal of multiplex (MUX), separates multiplex's digital signal to produce this.
4. apparatus for deciphering and descrambling as claimed in claim 1, it is characterized in that, this apparatus for deciphering and descrambling and a signal receiving device electrically connect, this signal receiving device is in order to receive this digital signal, and comprise one second coffret that electrically connects with this first coffret, first coffret of this apparatus for deciphering and descrambling receives this digital signal by second coffret of this signal receiving device.
5. apparatus for deciphering and descrambling as claimed in claim 4, it is characterized in that, this signal receiving device more comprises a decrypting device that electrically connects with this second coffret, this decrypting device is in order to calculate this control word according to an at least one key and an algorithm, the descrambling unit of this apparatus for deciphering and descrambling receives this control word by second coffret of this first coffret and this signal receiving device, and this separates multiplex's digital signal according to this control word deciphering and descrambling.
6. apparatus for deciphering and descrambling as claimed in claim 5, it is characterized in that, this is separated multiplex's digital signal and comprises a data-signal, this multiplex (MUX)/separate multiplex module more comprises an acquisition unit, separate multiplex (MUX) unit and the electric connection of this first coffret with this respectively, in order to receive this data-signal, and this data-signal captures this at least one key certainly, the decrypting device of this signal receiving device receives this at least one key by first coffret of this second coffret and this apparatus for deciphering and descrambling, and calculates this control word according to this at least one key and this algorithm.
7. apparatus for deciphering and descrambling as claimed in claim 5, it is characterized in that, more comprise a receiving element that electrically connects with this first coffret, in order to receive this at least one key, the decrypting device of this signal receiving device receives this at least one key by first coffret of this second coffret and this this apparatus for deciphering and descrambling, and calculates this control word according to this at least one key and this algorithm.
8. apparatus for deciphering and descrambling as claimed in claim 6 is characterized in that, this separates the multiplex (MUX) unit more in order to produce a Play Control signal according to this cipher key calculation, so that this descrambling unit transmits this deciphering and descrambling signal according to this Play Control signal.
9. apparatus for deciphering and descrambling as claimed in claim 6, it is characterized in that, this separates the multiplex (MUX) unit more in order to receiving a value added service key, and produces a Play Control signal according to this value added service cipher key calculation, so that this descrambling unit transmits this deciphering and descrambling signal according to this Play Control signal.
10. apparatus for deciphering and descrambling as claimed in claim 1 is characterized in that, more comprises with this to separate the receiving element that the multiplex (MUX) unit electrically connects, and in order to receive this digital signal, wherein, this is separated the multiplex (MUX) unit and receives this digital signal by this receiving element.
11. apparatus for deciphering and descrambling as claimed in claim 1 is characterized in that, this descrambling unit is more in order to calculate this control word according to an at least one key and an algorithm, so that this separates multiplex's digital signal according to this control word deciphering and descrambling.
12. apparatus for deciphering and descrambling as claimed in claim 1 is characterized in that, more comprises:
One decompression unit electrically connects with this descrambling unit, in order to this deciphering and descrambling signal that decompresses, to produce a decompressed signal; And
One broadcast unit electrically connects with this decompression unit, in order to play this decompressed signal.
13. deciphering and descrambling method that is used for an apparatus for deciphering and descrambling, this apparatus for deciphering and descrambling comprises one first coffret and a multiplex (MUX)/separate multiplex module, this multiplex (MUX)/separate multiplex module comprises separates a multiplex (MUX) unit and a descrambling unit, this separates the multiplex (MUX) unit and this first coffret electrically connects, this descrambling unit and this are separated the multiplex (MUX) unit and are electrically connected, and this deciphering and descrambling method comprises the following step:
(a) make this first coffret receive a digital signal;
(b) make this separate the multiplex (MUX) unit and separate this digital signal of multiplex (MUX), separate multiplex's digital signal to produce one; And
(c) make this descrambling unit receive a control word, and this separate multiplex's digital signal according to this control word deciphering and descrambling, to produce a deciphering and descrambling signal.
14. deciphering and descrambling method as claimed in claim 13, it is characterized in that, this multiplex (MUX)/separate multiplex module more comprises a multiplex (MUX) unit, this apparatus for deciphering and descrambling more comprises a storage control unit and a storage element, this multiplex (MUX) unit respectively with this first coffret, this separates multiplex (MUX) unit and this descrambling unit and electrically connects, this storage control unit electrically connects with this multiplex (MUX) unit and this storage element respectively, and this deciphering and descrambling method more comprises the following step:
(d) make this this digital signal of multiplex (MUX) unit multiplex (MUX), this separates multiplex's digital signal and this deciphering and descrambling signal, to produce multiplex's digital signal;
(e) make this storage control unit that this multiplex's digital signal is compiled as a Standard File Format signal; And
(f) make this storage element receive and store this Standard File Format signal.
15. deciphering and descrambling method as claimed in claim 14 is characterized in that, this storage control unit is more separated the multiplex (MUX) unit with this and is electrically connected, and this deciphering and descrambling method more comprises the following step:
(g) make this storage control unit read this Standard File Format signal, this Standard File Format signal is compiled as this multiplex's digital signal, and this multiplex's digital signal is sent to this separates the multiplex (MUX) unit from this storage element; And
(h) make this separate the multiplex (MUX) unit and separate this multiplex's digital signal of multiplex (MUX), separate multiplex's digital signal to produce this.
16. deciphering and descrambling method as claimed in claim 13, it is characterized in that, this apparatus for deciphering and descrambling and a signal receiving device electrically connect, and this signal receiving device comprises one second coffret that electrically connects with this first coffret, and this deciphering and descrambling method more comprises following steps:
(i) make this signal receiving device receive this digital signal;
Wherein, first coffret of this apparatus for deciphering and descrambling receives this digital signal by second coffret of this signal receiving device.
17. deciphering and descrambling method as claimed in claim 16 is characterized in that, this signal receiving device more comprises a decrypting device that electrically connects with this second coffret, and this deciphering and descrambling method more comprises following steps:
(j) make the decrypting device of this signal receiving device calculate this control word according to an at least one key and an algorithm;
Wherein, the descrambling unit of this apparatus for deciphering and descrambling receives this control word by second coffret of this first coffret and this signal receiving device, and this separates multiplex's digital signal according to this control word deciphering and descrambling.
18. deciphering and descrambling method as claimed in claim 17, it is characterized in that, this is separated multiplex's digital signal and comprises a data-signal, this multiplex (MUX)/separate multiplex module more comprises an acquisition unit, separate multiplex (MUX) unit and the electric connection of this first coffret with this respectively, this deciphering and descrambling method more comprises the following step:
(k) make this acquisition unit receive this data-signal, and this data-signal capture this at least one key certainly; And
(l) make the decrypting device of this signal receiving device this at least one key of first coffret reception by this second coffret and this apparatus for deciphering and descrambling;
Wherein, the decrypting device of this signal receiving device is calculated this control word according to this at least one key and this algorithm.
19. deciphering and descrambling method as claimed in claim 17 is characterized in that, this apparatus for deciphering and descrambling more comprises a receiving element that electrically connects with this first coffret, and this deciphering and descrambling method more comprises the following step:
(m) make this receiving element receive this at least one key; And
(n) make the decrypting device of this signal receiving device this at least one key of first coffret reception by this second coffret and this apparatus for deciphering and descrambling;
Wherein, the decrypting device of this signal receiving device is calculated this control word according to this at least one key and this algorithm.
20. deciphering and descrambling method as claimed in claim 18 is characterized in that, more comprises following steps:
(o) make this separate the multiplex (MUX) unit and produce a Play Control signal, so that this descrambling unit transmits this deciphering and descrambling signal according to this Play Control signal according to this cipher key calculation.
21. deciphering and descrambling method as claimed in claim 18 is characterized in that, more comprises following steps:
(p) make this separate the multiplex (MUX) unit and receive a value added service key, and produce a Play Control signal, so that this descrambling unit transmits this deciphering and descrambling signal according to this Play Control signal according to this value added service cipher key calculation.
22. deciphering and descrambling method as claimed in claim 13 is characterized in that, this apparatus for deciphering and descrambling more comprises with this separates the receiving element that the multiplex (MUX) unit electrically connects, and this deciphering and descrambling method more comprises following steps:
(q) make this receiving element receive this digital signal;
Wherein, this is separated the multiplex (MUX) unit and receives this digital signal by this receiving element.
23. deciphering and descrambling method as claimed in claim 13 is characterized in that, more comprises following steps:
(r) make this descrambling unit calculate this control word according to an at least one key and an algorithm;
Wherein, this separates multiplex's digital signal according to this control word deciphering and descrambling in this descrambling unit.
24. deciphering and descrambling method as claimed in claim 13, it is characterized in that, this apparatus for deciphering and descrambling more comprises a decompression unit and a broadcast unit, this decompression unit and this descrambling unit electrically connect, this broadcast unit and this decompression unit electrically connect, and this deciphering and descrambling method more comprises the following step:
(s) make this decompression unit this deciphering and descrambling signal that decompresses, to produce a decompressed signal; And
(t) make this broadcast unit play this decompressed signal.
25. the dispositions method of deciphering and descrambling one digital signal, this dispositions method is suitable can be used with an apparatus for deciphering and descrambling and signal receiving device collocation, and this apparatus for deciphering and descrambling and this signal receiving device electrically connect, and this dispositions method comprises the following step:
(a) make this apparatus for deciphering and descrambling receive this digital signal;
(b) make this signal receiving device receive at least one key;
(c) make this signal receiving device calculate a control word according to this an at least one key and an algorithm;
(d) make this signal receiving device that this control word is sent to this apparatus for deciphering and descrambling; And
(e) make this apparatus for deciphering and descrambling receive this control word, and according to this this digital signal of control word deciphering and descrambling, to produce a deciphering and descrambling signal.
26. dispositions method as claimed in claim 25, it is characterized in that, this signal receiving device comprises a decrypting device, this apparatus for deciphering and descrambling comprises a multiplex (MUX)/separate multiplex module, this step (c) is one to make this decrypting device calculate the step of this control word according to this at least one key and this algorithm, this step (e) is one to make this multiplex (MUX)/separate multiplex module according to this this digital signal of control word deciphering and descrambling, to produce the step of a deciphering and descrambling signal.
27. dispositions method as claimed in claim 26, it is characterized in that, this apparatus for deciphering and descrambling more comprises a storage control unit and a storage element, and this storage control unit electrically connects with this multiplex (MUX)/separate multiplex module and this storage element respectively, and this dispositions method more comprises the following step:
(f) make this multiplex (MUX)/separate multiplex module to produce multiplex's digital signal according to this digital signal;
(g) make this storage control unit that this multiplex's digital signal is compiled as a Standard File Format signal; And
(h) make this storage element receive and store this Standard File Format signal.
28. dispositions method as claimed in claim 27 is characterized in that, more comprises the following step:
(i) make this storage control unit read this Standard File Format signal, this Standard File Format signal is compiled as this multiplex's digital signal, and this multiplex's digital signal is sent to this multiplex (MUX)/separate multiplex module from this storage element; And
(j) make this multiplex (MUX)/separate multiplex module according to this multiplex's digital signal of this control word deciphering and descrambling, to produce this deciphering and descrambling signal.
29. dispositions method as claimed in claim 26 is characterized in that, more comprises the following step:
(k) make this signal receiving device receive this digital signal, and this digital signal is sent to this apparatus for deciphering and descrambling, so that this multiplex (MUX)/multiplex module separated according to this this digital signal of control word deciphering and descrambling, to produce this deciphering and descrambling signal.
30. dispositions method as claimed in claim 26, it is characterized in that, this apparatus for deciphering and descrambling more comprises a receiving element that electrically connects with this multiplex (MUX)/separate multiplex module, this step (a) is one to make this apparatus for deciphering and descrambling receive this digital signal by this receiving element, so that this multiplex (MUX)/separate multiplex module according to this this digital signal of control word deciphering and descrambling, to produce the step of a deciphering and descrambling signal.
31. dispositions method as claimed in claim 26 is characterized in that, more comprises the following step:
(l) make this multiplex (MUX)/separate multiplex module from this digital signal acquisition this at least one key, and should be sent to this signal receiving device by at least one key, so that this decrypting device this at least one key of basis and this algorithm are calculated this control word.
32. dispositions method as claimed in claim 26 is characterized in that, this apparatus for deciphering and descrambling more comprises a receiving element that electrically connects with this signal receiving device, and this dispositions method more comprises the following step:
(m) make this receiving element receive this at least one key, and should be sent to this signal receiving device by at least one key, so that this decrypting device is calculated this control word according to this at least one key and this algorithm.
33. dispositions method as claimed in claim 26 is characterized in that, more comprises the following step:
(n) make this multiplex (MUX)/separate multiplex module to produce a Play Control signal according to this cipher key calculation, so that this multiplex (MUX)/separate multiplex module to transmit this deciphering and descrambling signal according to this Play Control signal.
34. dispositions method as claimed in claim 26 is characterized in that, more comprises the following step:
(o) make this multiplex (MUX)/separate multiplex module to receive a value added service key, and produce a Play Control signal according to this value added service cipher key calculation, so that this multiplex (MUX)/separate multiplex module to transmit this deciphering and descrambling signal according to this Play Control signal.
CN201010533128.6A 2010-04-16 2010-10-22 Decrypting descrambling device, decrypting descrambling method and disposing method Expired - Fee Related CN102223582B (en)

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