TWI532371B - Decryption-descrambling apparatus, decryption-descrambling method, deployment method and computer program product thereof - Google Patents

Description

Decryption descrambling device, decryption descrambling method, deployment method and computer program product thereof

The present invention relates to a decryption descrambling device, a decryption descrambling method, a deployment method, and a computer program product thereof for receiving digital encryption scrambled broadcast. In particular, the present invention relates to a decryption descrambling device, a decryption descrambling method, a deployment method, and a computer program product thereof for decrypting a descrambled digital signal.

With the advent of the digital age, the development of television broadcasting has also been transformed from a traditional analog system to a digital system; in addition to providing higher-quality audio and video content, digital broadcasting using digital systems is more important after digitalization. Various additional services. On the other hand, with the development of digital TV broadcasting systems, the multi-network convergence architecture that integrates existing telecommunication networks, cable TV networks, broadcast TV networks and the Internet into a common network will become the future. The mainstream network architecture. In this way, in addition to reducing the deployment of basic communication equipment, simplifying network management, and extending the coverage of the signal, it can further integrate various services and derive richer value-added services to further improve information utilization.

In response to the development of digital broadcast television broadcasting systems and the implementation of multi-network convergence architecture, various end products have sprung up in the market. However, with the popularity of digital signals and various end products, service providers no longer receive benefits by charging advertisers advertising fees, but instead directly charge users for viewing digital video content and value-added services. The way to get the benefits. Therefore, interactive payment-type digital audio and video content has become a trend of service providers in the future. Therefore, users must pay attention to the digital video and data content they purchase through the payment transaction and the authentication method.

In order to implement the above mechanism for paying for viewing digital audio and video content, the end product supplier must cooperate with the service provider. Please refer to FIG. 1 , which is a schematic diagram of an end product. In general, the terminal product 1 includes a receiving device 11 and a playing device 12, wherein the receiving device 11 is electrically connected to the playing device 12, and includes a receiving unit 11a and a microcontroller (MCU) descrambling. The unit 11b and a decrypting chip 11c, the receiving unit 11a and the decrypting chip 11c are electrically connected to the microcontroller descramble unit 11b, respectively.

After the user purchases the digital video/data content to be viewed, the service provider sends an encryption (Encrypt) scramble signal 100 including the digital video/data content, and the receiving device 11 receives the encryption through the receiving unit 11a. The signal 100 is scrambled and the encrypted scrambled signal 100 is transmitted to the microcontroller descramble unit 11b. Next, the microcontroller descramble unit 11b extracts a key signal 101 from the encrypted scramble signal 100 and transmits the key signal 101 to the decryption chip 11c. The decryption chip 11c generates a control word 110 based on the key signal 101 and transmits the control word 110 to the microcontroller descramble unit 11b. Subsequently, the microcontroller descrambling unit 11b decrypts (Decrypt) the encrypted scramble signal 100 according to the control code 110 to generate a decrypted descramble signal 102, and transmits the decrypted descramble signal 102 to the playback device 12. . Finally, the terminal product 1 plays the decrypted descrambling signal 102 through the playback device 12, wherein the decrypted descramble signal 102 is a playable signal containing the digital video/data content.

Based on the above-mentioned digital audio/video content providing method, the terminal product must have the function of decrypting and descrambling the encrypted scrambled signal stream. In the prior art, the control word code required for performing the descrambling operation is performed by the decryption chip configured in the receiving device. However, since the descrambling operation is a relatively complicated operation, the decryption chip currently on the market cannot be used for execution. De-scrambling operation. Therefore, the receiving device must additionally configure a microcontroller descrambling unit or a microprocessor descrambling unit dedicated or shared with other functions to perform the descrambling operation. As a result, the hardware cost of the end product will be greatly increased. On the other hand, when using a microcontroller descrambling unit or a microprocessor descrambling unit for descrambling, a program must be additionally programmed and installed on the playback device to drive and link the aforementioned microcontroller. The descrambling unit or the microprocessor descrambling unit will also greatly increase the complexity of the terminal product.

In addition, decrypting the descrambled storage file format via the aforementioned microcontroller/microprocessor descrambling unit must conform to the file format specification of the playback device. For example, when the playback device is a computer using a Windows operating system, the file format of the descrambled digital audio and video content must be decrypted and used for Windows operations via the aforementioned microcontroller/microprocessor descrambling unit. Direct show or Direct play multimedia playback platform under the system. As a result, the terminal product supplier may have to write a special application program to control the aforementioned microcontroller/microprocessor descrambling unit to decrypt the descrambled digital audio and video content, and convert the file format of the aforementioned digital audio and video content. In order to comply with the digital audio and video content of the Direct show or Direct play multimedia player platform under the Windows operating system and attach a unique controllable file format, this will result in compatibility problems between file format conversion, and will also increase the software design of the terminal product. cost.

On the other hand, in the prior art, the terminal product directly decrypts and de-scrambles an encrypted scrambled signal through the receiving device, and then transmits the decrypted and descrambled signal to the playback device to perform digital audio/video content. Play. However, because the signal output by the receiving device is a decryption descrambling signal, the user can perform digital audio/video content on any playback device having a playback function by capturing the decryption descrambling signal output by the receiving device. Play. In this way, as long as a single user pays for and purchases a digital video/data content, the digital video/data content can be provided to other unpaid users, so that the digital audio/data content cannot be effectively protected. , in turn, generate loopholes and losses in fees.

In summary, how to provide an end product that does not require additional hardware components and reduces the software design cost, and can effectively protect digital content is an urgent problem for the technicians in the field.

It is an object of the present invention to provide a decryption descrambling apparatus for receiving digital encrypted scrambled broadcasts. The decryption descrambling device comprises a first transmission interface and a multiplex/demultiplexing module. The multiplex/demultiplexing module further includes a demultiplexing unit and a descrambling unit. The first transmission interface is configured to receive a digital signal. The demultiplexing unit is electrically connected to the first transmission interface for demultiplexing the digital signal to generate a demultiplexed digital signal, and generating a playback control signal according to the at least one key calculation. The descrambling unit is electrically connected to the demultiplexing unit for receiving the demultiplexed digital signal and a control word, and decrypting the demultiplexing according to the control word decryption (Decrypt) The digital signal is used to generate a decrypted descrambling signal, and a decision is made as to whether to transmit the decrypted descrambling signal based on the playback control signal.

Another object of the present invention is to provide a decryption and descrambling method for a decryption descrambling device for receiving a digitally encrypted scrambled broadcast. The decryption descrambling device comprises a first transmission interface and a multiplex/demultiplexing module. The multiplex/demultiplexing module includes a demultiplexing unit and a descrambling unit, and the demultiplexing unit is electrically connected to the first transmission interface, and the descrambling unit and the demultiplexing unit are electrically connected. Connecting, the decryption descrambling method comprises the steps of: (a) causing the first transmission interface to receive a digital signal; (b) causing the demultiplexing unit to multiplex the digital signal to generate a demultiplexed digital signal, And generating a playback control signal according to the at least one key calculation; and (c) causing the descrambling unit to receive the demultiplexed digit signal and a control word code, and decrypting and descrambling the demultiplexed digital signal according to the control word code to A decryption descrambling signal is generated, and whether the decryption descrambling signal is transmitted is determined according to the playback control signal.

It is still another object of the present invention to provide a method of decrypting a descrambled digital signal. The deployment method is suitable for use with a decryption descrambling device and a signal receiving device. The decryption descrambling device is electrically connected to the signal receiving device, and the deployment method comprises the steps of: (a) causing the decryption descrambling device to receive the digital signal; and (b) causing the signal receiving device to receive at least one key; (c) causing the signal receiving device to calculate a control word code based on the at least one key and an algorithm; (d) causing the signal receiving device to transmit the control word code to the decryption descrambling device; and (e) causing the decryption The descrambling device receives the control word code and decrypts the digital signal according to the control word code to generate a decryption descrambling signal.

It is still another object of the present invention to provide a computer program product storing a program for decrypting and descrambling a decryption descrambling device, the decryption descrambling device comprising a first transmission interface and a multiplex/demultiplex Module. The multiplex/demultiplexing module includes a demultiplexing unit and a descrambling unit, and the demultiplexing unit is electrically connected to the first transmission interface, and the descrambling unit and the demultiplexing unit are electrically connected. Connected, the program is executed after being loaded into the decryption descrambling device via a computer: a program command A, the first transmission interface receives a digital signal; and a program command B causes the demultiplexing unit to demultiplex the digital device Generating a signal to generate a multiplexed digital signal and generating a playback control signal based on the at least one key; and a program command C for causing the descrambling unit to receive the multiplexed digital signal and a control word, and The control word decrypts the descrambled multiplexed digital signal to generate a decrypted descramble signal, and determines whether to transmit the decrypted descramble signal according to the play control signal.

In summary, the decryption descrambling device of the present invention receives a digital signal through a first transmission interface, and then demultiplexes the digital signal by demultiplexing a multiplexed unit with the first transmission interface. Finally, Receiving the demultiplexed digit signal and a control word through a descrambling unit electrically connected to the demultiplexing unit, and decrypting the demultiplexed digit signal according to the control word code to generate a decrypted descrambling signal. In this way, the decryption and descrambling operation of the digital signal can be performed by decrypting the descrambling device, and there is no need to additionally configure a microcontroller/microprocessor descrambling unit in the signal receiving device of the prior art, and it is not necessary to A special application is programmed in the decryption descrambling device to control the decrypted digital video/data content by the microcontroller/microprocessor descrambling unit. In other words, the present invention overcomes the disadvantages of the prior art that requires additional hardware and software design costs, inability to effectively protect digital content, and compatibility issues between file formats.

Other objects of the present invention, as well as the technical means and implementations of the present invention, will be apparent to those skilled in the art in view of the appended claims.

The present invention is not limited by the embodiments, and the embodiments of the present invention are not intended to limit the invention to any specific environment, application or special mode as described in the embodiments. Therefore, the description of the embodiments is merely illustrative of the invention and is not intended to limit the invention. It should be noted that in the following embodiments and drawings, elements that are not directly related to the present invention have been omitted and are not shown.

The first embodiment of the present invention is a decryption descrambling device 2a, the schematic of which is depicted in Figure 2A. The decryption descrambling device 2a includes a first transmission interface 21, a multiplex/demultiplexing module 22, an access control unit 23, a storage unit 24, a decompression unit 25, and a playback unit 26, multiplexed/ The demultiplexing module 22 further includes a demultiplexing unit 22a, a descrambling unit 22b, a capturing unit 22c, and a multiplexing unit 22d. The demultiplexing unit 22a is electrically connected to the first transmission interface 21; the descramble unit 22b is electrically connected to the demultiplexing unit 22a; and the extraction unit 22c is electrically connected to the first transmission interface 21 and the demultiplexing unit 22a, respectively. The multiplex unit 22d is electrically connected to the first transmission interface 21, the demultiplexing unit 22a, and the descramble unit 22b, respectively; the access control unit 23 is electrically connected to the demultiplexing unit 22a and the multiplex unit 22d, respectively; The unit 24 is electrically connected to the access control unit 23; the decompression unit 25 is electrically connected to the descramble unit 22b; and the playback unit 26 is electrically connected to the decompression unit 25. In this embodiment, the decryption and descrambling device 2a is a computer, but in other embodiments, the decryption and descrambling device 2a may also be a mobile phone or other device that can be used to decrypt and desperate a digital signal. Limit the scope of the invention.

The decryption descrambling device 2a of the present invention is used to decrypt a descrambled digital signal, which is suitable for use with a signal receiving device 3. The signal receiving device 3 is electrically connected to the decryption descrambling device 2a, and its schematic diagram is depicted in FIG. The signal receiving device 3 includes an antenna 31, a filter 32, a tuner 33, a demodulator 34, a bridge 35, a decryption unit 36, and a second transmission interface 37. The antenna 31 is electrically connected to the filter 32; the filter 32 is electrically connected to the tuner 33; the tuner 33 is electrically connected to the demodulator 34; and the demodulator 34 and the decrypting unit 36 are electrically connected to the bridge 35, respectively. The bridge 35 is electrically connected to the second transmission interface 37; the second transmission interface 37 is electrically connected to the first transmission interface 21 of the decryption and descrambling device 2a.

In the present embodiment, the signal receiving device 3 is connected to the decryption descrambling device 2a via an external connection, that is, the signal receiving device 3 is an external device. In other embodiments, the signal receiving device 3 can also be connected to the decryption and descrambling device 2a through an internal connection, that is, the signal receiving device 3 can be a device built into the decryption and descrambling device 2a, and This limits the scope of the invention.

Referring to FIG. 3, the antenna 31 is configured to receive a digital broadcast signal 300 and transmit the digital broadcast signal 300 to the filter 32. The filter 32 is configured to filter a signal in the digital broadcast signal 300 that conforms to the received frequency range to generate a digital broadcast signal 302 and transmit the digital broadcast signal 302 to the tuner 33. For example, the filter 32 is used to filter out UHF band signals, VHF band signals, S-band signals, or Ku-band signals in the digital broadcast signal 300, depending on the frequency band to be received in actual application, and does not This limits the scope of the invention.

The tuner 33 is operative to tune the frequency of the received digital broadcast signal 302 to a baseband frequency to generate a digital broadcast signal 304 and to transmit the digital broadcast signal 304 to the demodulator 34. Next, demodulator 34 is used to demodulate the variable bit broadcast signal 304 and generate a digital signal 306, which is then transmitted by demodulator 34 to bridge 35. The bridge 35 is configured to convert an input signal into an output signal conforming to the interface format of the second transmission interface 37. In this embodiment, the digital signal 306 is converted to a digital signal 308 that conforms to the interface format of the second transmission interface 37. The bridge 35 then transmits the digital signal 308 to the second transmission interface 37. Finally, the decryption descrambling device 2a receives the digital signal 308 from the second transmission interface 37 via the first transmission interface 21. The second transmission interface 37 and the first transmission interface 21 may be one of a USB 2.0 interface, a PC Card interface, an Express Card interface, a PCI interface, a miniCard interface, and a PCI Express interface, or other data transmission interfaces. This limits the scope of the invention.

It should be noted that the digital signal 308 can be a signal conforming to the Broadcast Driver Architecture (BDA) and includes a video signal, an audio signal and a data signal. In general, in order to protect the content of the digital signal, the digital signal provider encrypts and scrambles the transmitted digital signal through encryption (Encrypt) and scramble (Scramble) technology. In other words, the digital signal 308 is an encrypted scrambled signal. In order to improve the transmission efficiency, the signal provider further performs a multiplex processing on the digital signal to form a single signal stream. The multiplexed digital signal includes a plurality of multiplex frames, and each multiplex frame further includes a plurality of multiplex subframes, and each multiplex subframe Contains video signals, audio signals, and data signals.

Referring to FIG. 2A at the same time, after receiving the digital signal 308, the first transmission interface 21 transmits the digital signal 308 to the demultiplexing unit 22a. The demultiplexing unit 22a then demultiplexes the digital signal 308 and generates a demultiplexed digital signal. The multiplexed digital signal includes a data signal 220a, an audio signal 222a, and a video signal 224a. The data signal 220a, the audio signal 222a, and the video signal 224a are respectively an encrypted scrambled signal. It should be noted that the multiplexed operation of the present invention means that a multiplex frame is solved from a digital signal, and a plurality of multiplex frames are further solved from the multiplex frame; Or, a plurality of multiplex frames are solved from a digital signal, and a plurality of multiplex sub-frames are further solved from the multiplex frames, and finally, the data signals are extracted from the multiplex sub-frames. And audio and video signals.

The data signal 220a includes a control data signal 220a1 and a playback data signal. The control data signal 220a1 further includes a key 226 for calculating the control word code, and the manner in which the control word code is calculated will be further explained in the following paragraphs. After the descrambling unit 22b decrypts the descrambling, the play data signal is a playable signal, and further includes an uncompressed signal and a compressed signal. The uncompressed signal is an uncompressed signal, and thus can be directly played by the playing unit 26; and the compressed signal is a compressed signal, which must be decompressed via the decompressing unit 25 before being played by the unit 26 Play.

In this embodiment, the key 226 further includes a program stream key and a service key, wherein the program stream key is used to encrypt a source (such as a broadcast television signal source, an internet signal source). And the program stream sent by the telecommunication network signal source, etc.). For example, in the embodiment, the program stream key is a key used to encrypt the data signal 220a, the audio signal 222a, and the video signal 224a; the service key is used by the service provider to encrypt the service content provided by the service provider. , which is a business authorization key for a successful subscription to a specific user. In other embodiments, the key 226 may further include one or more other keys that can be used to calculate the control word, and does not limit the scope of the invention by the number of keys.

Specifically, the service key is calculated by the service provider based on one or a plurality of service key calculation factors. For example, in this embodiment, the service key operation factors include: (1) a chip key (Chip ID) factor, and the chip key is also called a user key, and the chip key system Pre-written by the chip supplier to the decryption unit, each decryption unit has a unique wafer key for identifying the decryption unit used by the user. For example, the chip key may be a unique identification card number of a decryption unit (such as ABC-110-01, ABC-372-17, DEF-230-22, etc.), and the service key calculated according to the chip key factor. It can be used to determine whether a terminal device having the decryption unit is a legitimate subscriber; (2) a content factor is related to the service content subscribed by the user (such as the audio and video content ordered by the user), and is calculated according to the content factor. The service key can be used to determine whether a user subscribes to a specific service content; (3) a life cycle factor, and a service key can set a valid life cycle (eg, one month) during the valid life cycle. The service key is valid and can be used to calculate a control code. If the valid lifetime is exceeded, the service key is invalid and cannot be used to calculate the control code, so the calculation is based on the survival period factor. The obtained service key has a valid life cycle; and (4) a user password factor is a user password set by the user, and the service key calculated according to the user password factor can be used. Off a user is a legitimate user. In addition to the above four service key operation factors, in other embodiments, the service provider may calculate the service key according to another one or a plurality of service key operation factors, depending on the actual application mode, and not Limit the scope of the invention.

After generating the data signal 220a, the audio signal 222a, and the video signal 224a, the demultiplexing unit 22a then transmits the control data signal 220a1 in the data signal 220a to the capture unit 22c. After receiving the control data signal 220a1, the capturing unit 22c extracts the key 226 from the control data signal 220a1, and transmits the key 226 to the decryption unit through the first transmission interface 21, the second transmission interface 37, and the bridge 35. 36. After receiving the key 226, the decryption unit 36 performs a decryption operation based on the key 226 and the unique user key of the decryption unit 36 itself by an algorithm (for example, Advanced Encryption Standard Algorithm; AES algorithm). In this embodiment, the decryption unit 36 performs the decryption operation by using the AES algorithm. In other embodiments, the decryption unit 36 may perform decryption operations by using one or more other algorithms. The type and number of algorithms are not limited. The scope of the invention. The decryption unit 36 generates a control word 360 after the decryption operation is completed, and transmits the control word 360 to the demultiplexing unit 22a through the bridge 35, the second transmission interface 37, and the first transmission interface 21.

In other embodiments, the decryption unit 36 can perform the decryption operation by an algorithm according to a value-added service key, in addition to the decryption operation performed by an algorithm according to a key. Specifically, the decryption unit 36 can further receive an added service key (not shown), and generate a control word code according to the key and the value added service key. The value-added service key is used by the service provider to encrypt the value-added service content provided by the service provider, which is an added value service authorization key for a specific user subscription. As described above, the value added service key is calculated by the service provider according to one or more value-added service key operation factors, and the value-added service key operation factors include: (1) a wafer key (Chip ID) factor; (2) a content factor; (3) a survival period factor and (4) a user cryptographic factor. The number and type of value-added service key calculation factors are determined depending on the actual application mode, and do not limit the scope of the present invention.

The decryption unit 36 can calculate the control code according to the other key or the key used to calculate the control code, in addition to calculating the control word according to the above-mentioned key and the value-added service key. Accordingly, the type of key used to calculate the control code and the number of keys are not intended to limit the scope of the present invention.

It should be specially noted that the value-added service key can be received from a service provider through the receiving device 2, or can be received by one of the decryption descrambling devices 2a (not shown) from a source (such as broadcast television). Obtained from signal sources, Internet signal sources, and telecommunications network signal sources.

After demultiplexing the data signal 220a, the audio signal 222a, and the video signal 224a, the demultiplexing unit 22a further extracts a program stream key and a service key from the data signal 220a, and then demultiplexes the multiplex. Unit 22a calculates a play control signal 227a based on the program stream key and the service key. The play control signal 227a is used to verify whether the data signal 220a, the audio signal 222a, and the video signal 224a are authorized playable signals.

In other embodiments, the demultiplexing unit 22a may further calculate a playback control signal according to an added service key, that is, the demultiplexing unit 22a according to a program stream key, a service key, and a value added service. The key calculates a playback control signal that, as previously described, is used to verify whether a data signal, an audio signal, and a video signal are authorized playable signals.

The demultiplexing unit 22a can calculate the playback control signal according to the program stream key, the service key, and the value added service key. In other embodiments, the demultiplexing unit 22a can be further available according to one or more of the other. The playback control signal is calculated by calculating the key of the playback control signal, whereby the key type and the number of keys used to calculate the playback control signal are not intended to limit the scope of the present invention.

After receiving the control word code 360, the demultiplexing unit 22a transmits the data signal 220a, the audio signal 222a, the video signal 224a, the control word code 360, and the playback control signal 227a to the descramble unit 22b. The descrambling unit 22b decrypts (Decrypt) the data signal 220a, the audio signal 222a, and the video signal 224a according to the control code 360, and generates a data signal 220b, an audio signal 222b, and a video signal 224b, respectively, wherein the data signal 220b, audio signal 222b and video signal 224b are respectively a decryption descrambling signal.

It should be noted that the descramble unit 22b can decrypt the descrambled data signal 220a, the audio signal 222a, and the video signal 224a only according to a correct control code corresponding to the data signal 220a, the audio signal 222a, and the video signal 224a. The control word code is calculated by the decryption unit 36 based on the unique user key of the decryption unit 36 itself, the service key, and the program stream key corresponding to the data signal 220a, the audio signal 222a, and the video signal 224a. If the control word code is not a control word code applicable to the data signal 220a, the audio signal 222a, and the video signal 224a, the control word code calculated by the decryption unit 36 is not a correct control word code, and the descramble unit 22b cannot The correct control word decrypts the descrambled data signal 220a, the audio signal 222a, and the video signal 224a. In addition, after the data signal 220b, the audio signal 222b, and the video signal 224b are generated, the descrambling unit 22b further determines whether to transmit the data signal 220b, the audio signal 222b, and the video signal 224b according to the playback control signal 227a. The decompression unit 25, specifically, if the playback control signal 227a calculated by the demultiplexing unit 22a indicates that the data signal 220a, the audio signal 222a, and the video signal 224a are authorized playable signals, the descramble unit 22b The decrypted descrambled signal is transmitted to the decompression unit 25; conversely, if the playback control signal 227a calculated by the demultiplexing unit 22a indicates that the data signal 220a, the audio signal 222a, and the video signal 224a are not authorized playable signals Then, the descramble unit 22b does not transmit the decrypted descrambled signal to the decompression unit 25. In this way, the decryption descrambling device of the present invention can effectively protect and control the signal content of the signal to be played.

The descramble unit 22b transmits the data signal 220b, the audio signal 222b, and the video signal 224b to the decompression unit 25. Decompression unit 25 then decompresses data signal 220b to produce a data signal 250; decompresses audio signal 222b to produce an audio signal 252; decompresses video signal 224b to produce a video signal 254. The data signal 250, the audio signal 252, and the video signal 254 are respectively a decompressed signal.

Finally, decompression unit 25 transmits data signal 250, audio signal 252, and video signal 254 to playback unit 26, respectively. The playback unit 26 plays the data signal 250, the audio signal 252, and the video signal 254. The playing unit 26 can be a sound effect unit, a display unit or other device that can be used to play the decompressed signal, and does not limit the scope of the present invention.

In addition, in practical applications, when the user receives a digital broadcast signal, in addition to playing the digital broadcast signal through the decryption descrambling device of the present invention, there may also be a need to store the digital broadcast signal. For example, when the digital broadcast signal is a program, after the user receives the program, in addition to directly watching the program, it may also wish to record the program for repeated playback and viewing. Therefore, the decryption descrambling device of the present invention further provides a function of storing a digital broadcast signal. The structure and operation of the decryption descrambling device of the present invention for storing digital broadcast signals will be described in detail below.

The decryption descrambling device of the present invention can store signals of three different formats, and the signal to be stored must first undergo a multiplexing process through the multiplexing unit 22d to conform to the signal format that the access control unit 23 can store. Referring to FIG. 2A, the multiplex unit 22d is electrically connected to the first transmission interface 21, the demultiplexing unit 22a, and the descrambling unit 22b, respectively, and is used to multiplex the signal to be stored as a single data stream. . Therefore, the decryption descrambling means can store one of the signal generated by the first transmission interface 21, the signal generated by the demultiplexing unit 22a, and the signal generated by the descramble unit 22b, or a combination thereof, respectively. It should be noted that the decryption descrambling device of the present invention can be used to store signals in three different formats, but in actual application, one or a combination of the three signals can be stored, depending on the actual application situation, and is not determined. Therefore, it is required to limit the present invention to simultaneously store signals of the three different formats. The storage of these three different format signals will be further explained in the following paragraphs.

First, when the first transmission interface 21 receives the digital signal 308, the digital signal 308 is transmitted to the multiplex unit 22d. On the other hand, after the playback multiplex unit 22a generates the playback control signal 227a, the demultiplexing unit 22a also transmits the playback control signal 227a to the multiplex unit 22d. The multiplex unit 22d then multiplexes the digital signal 308 and the playback control signal 227a to generate a multiplexer signal 228a and transmits the multiplexed signal 228a to the access control unit 23. The access control unit 23 then compiles the multiplexed bit signal 228a to a standard file format signal 230a and transmits the standard file format signal 230a to the storage unit 24. The storage unit 24 finally receives and stores the standard file format signal 230a, which is the manner in which the signals generated by the first transmission interface 21 are stored.

Second, after the multiplex unit 22a demultiplexes the multiplexer signal 308, the data signal 220a, the audio signal 222a, the video signal 224a, and the playback control signal 227a are generated. Next, the demultiplexing unit 22a transmits the data signal 220a, the audio signal 222a, the video signal 224, and the playback control signal 227a to the multiplex unit 22d. The multiplex unit 22d then multiplexes the data signal 220a, the audio signal 222a, the video signal 224a, and the playback control signal 227a to generate a multiplexed bit signal 228b and transmits the multiplexed bit signal 228b to the access control unit 23. The access control unit 23 then compiles the multiplexed bit signal 228b to become a standard file format signal 230b and transmits the standard file format signal 230b to the storage unit 24. Finally, storage unit 24 receives and stores standard file format signal 230b, which is the manner in which the signals generated by demultiplexing unit 22a are stored.

Finally, after the descrambling unit 22b decrypts the descrambled data signal 220a, the audio signal 222a, and the video signal 224a, a data signal 220b, an audio signal 222b, and a video signal 224b are generated. The descramble unit 22b transmits the data signal 220b, the audio signal 222b, and the video signal 224b to the multiplex unit 22d. Since the data signal 220b does not include the control data signal 220a1, and the data signal 220b, the audio signal 222b, and the video signal 224b are all decrypted and descrambled signals, in order to store the data signal 220b, the audio signal 222b, and the video signal 224b. The content of the signal can be effectively protected, and the playback control signal 227a generated by the demultiplexing unit 22a must be simultaneously stored. At this time, the demultiplexing unit 22a transmits the playback control signal 227a to the multiplex unit 22d. The multiplex unit 22d then multiplexes the data signal 220b, the audio signal 222b, the video signal 224b, and the playback control signal 227a to generate a multiplexed bit signal 228c and transmits the multiplexed bit signal 228c to the access control unit 23. The access control unit 23 then compiles the multiplexed bit signal 228c into a standard file format signal 230c and transmits the standard file format signal 230c to the storage unit 24. Finally, storage unit 24 receives and stores standard file format signal 230c, which is the manner in which the signals generated by descrambling unit 22b are stored.

It should be specifically noted that the signal generated by the multiplex unit 22d includes a playback control signal whether it is a signal for encrypting scrambling or a signal for decrypting descrambling. In other words, even if the file stored in the storage unit 24 is captured by an unauthorized user, the encrypted scrambled file containing the playback control signal and the decrypted and descrambled file must be verified by playing the control signal. The method of playback and verification will be described in the following paragraphs. Therefore, the decryption descrambling device of the present invention can effectively protect the signal content of the stored signal while storing the signal.

Next, the following paragraphs will describe the manner in which the decryption descrambling device of the present invention plays the encrypted scrambled file stored in the storage unit 24. First, the access control unit 23 reads the standard file format signal 230a from the storage unit 24, then compiles the standard file format signal 230a into a multiplexed bit signal 228a, and transmits the multiplexed bit signal 228a to the demultiplexing unit 22a. The demultiplexing unit 22a then demultiplexes the multiplexed digit signal 228a to produce a data signal 220a, an audio signal 222a, a video signal 224a, and a playback control signal 227a. Subsequent operations of calculating the control code, decrypting and descrambling, decompressing and playing are the same as those described in the previous paragraph, and therefore will not be further described herein.

Similarly, the access control unit 23 can also read the standard file format signal 230b, and the compiled standard file format signal 230b is the multiplexed bit signal 228b, and the multiplexed bit signal 228b is transmitted to the demultiplexing unit 22a. The demultiplexing unit 22a demultiplexes the multiplexed digital signal 228b to generate the data signal 220a, the audio signal 222a, the video signal 224a, and the playback control signal 227a. Subsequent operations of calculating the control code, decrypting and descrambling, decompressing and playing are the same as those described in the previous paragraph, and therefore will not be further described herein.

Similarly, the access control unit 23 can also read the standard file format signal 230c, and the compiled standard file format signal 230c is the multiplexed bit signal 228c, and the multiplexed bit signal 228c is transmitted to the demultiplexing unit 22a. The demultiplexing unit 22a demultiplexes the multiplexed digital signal 228c to generate the data signal 220b, the audio signal 222b, the video signal 224b, and the playback control signal 227a, and the data signal 220b, the audio signal 222b, the video signal 224b, and the playback control signal. 227a is transmitted to the descrambling unit 22b. The descramble unit 22b then verifies the play control signal 227a to determine whether the data signal 220b, the audio signal 222b, and the video signal 224b are signals authorized to be played. If so, the representative data signal 220b, the audio signal 222b, and the video signal 224b are signals authorized to be played, and the descramble unit 22b transmits the data signal 220b, the audio signal 222b, and the video signal 224b to the decompression unit 25; if not, Then, the data signal 220b, the audio signal 222b, and the video signal 224b are not authorized to be played, and the descramble unit 22b does not transmit the data signal 220b, the audio signal 222b, and the video signal 224b to the decompression unit 25, that is, the data. Signal 220b, audio signal 222b, and video signal 224b cannot be played. Thereby, the signal content of the data signal 220b, the audio signal 222b, and the video signal 224b is effectively protected. The operations of decompressing and playing the data signal 220b, the audio signal 222b, and the video signal 224b after being sent to the decompression unit 25 by the descrambling unit 22b are the same as those described in the previous section, and therefore will not be further described herein.

In another application example, the decryption and descrambling device of the present invention can also receive a clear stream signal (not shown). The clear stream signal according to the present invention refers to a decrypted descramble signal including a data signal, an audio signal, and a video signal. Wherein the data signal further comprises a control data signal. When a clear stream signal is received by the first transmission interface 21, the clear stream signal is transmitted to the demultiplexing unit 22a to generate a demultiplexed bit signal, and the demultiplexing unit 22a then proceeds according to an added service key and the control data. The key in the signal generates a playback control signal and transmits the playback control signal to the descramble unit 22b. Since the multiplexed digital signal is a decrypted descrambling signal, the descrambling operation is not required to be performed by the descrambling unit 22b. Therefore, the descrambling unit 22b determines whether the clear signal is the The signal for authorizing permission to play is the same as the preceding paragraph, and therefore will not be described here. Accordingly, the decryption descrambling device of the present invention can also receive a clear stream signal and decide whether to play the clear stream signal, so as to effectively control whether the received signal can be played by the decryption descrambling device to achieve the security maintenance of the wireless broadcast.

The access control unit 23 of the present embodiment is a time shifting file accessor, that is, the access control unit 23 can simultaneously write the file to the storage unit 24 and read the file from the storage unit 24. In this way, the function of recording a program, quickly broadcasting a program, rewinding a program, or jumping a program while watching a program can be realized. In other embodiments, the access control unit 23 may also be an access controller for reading files or writing files to the storage unit 24, and does not limit the scope of the present invention.

A second embodiment of the present invention is a decryption descrambling device 2b, the schematic of which is depicted in Figure 2B. The difference between the decryption and descrambling device 2b of the second embodiment and the decryption and descrambling device 2a of the first embodiment is that the decryption and descrambling device 2b further includes a receiving unit 27 electrically connected to the first transmission interface 21. The receiving unit 27 is configured to receive a key 270 and transmit the key 270 to the decryption unit 36 through the first transmission interface 21, the second transmission interface 37, and the bridge 35. The decryption unit 36 may also be based on the self-receiving unit 27. The received key 270 performs a decryption operation by an algorithm and generates a control word code 360 as described in the first embodiment. The descramble unit 22b can decrypt the descrambled data signal 220a, the audio signal 222a, and the video according to the control word code 360. Signal 224a. On the other hand, the receiving unit 27 further transmits the key 270 to the demultiplexing unit 22a, and the demultiplexing unit 22a further generates a playback control signal 227b according to the key 270, and the descramble unit 22b can be based on the playback control signal 227b. It is decided whether or not to decrypt the descrambled data signal 220a, the audio signal 222a, and the video signal 224a to the decompression unit 25. In addition to the above differences, the second embodiment can also perform the operations and functions described in the first embodiment, and those skilled in the art can directly understand how the second embodiment performs the operations and functions based on the above-described first embodiment. Therefore, I will not repeat them.

A third embodiment of the present invention is a decryption descrambling device 2c, the schematic of which is depicted in Figure 2C. The difference between the decryption and descrambling device 2c of the third embodiment and the decryption and descrambling device 2a of the first embodiment is that the decryption and descrambling device 2c further includes a receiving unit 27 electrically connected to the demultiplexing unit 22a. The receiving unit 27 is configured to receive a digital signal 272 from a signal source and transmit the digital signal 272 to the demultiplexing unit 22a. The decryption descrambling device 2c can decrypt the descrambling and play the digital signal 272. In this embodiment, the receiving unit 27 is a network signal transceiver, including a wireless network signal receiving device (such as a wireless network card, a wireless data card, etc.) and a wired network signal receiving device (such as RJ- 45 interface interface network card), or any other transceiver that can be used to connect to the network. The network signal transceiver can be used to connect to a network through which the decryption descrambling device 2c can receive and transmit signals to the network. In other embodiments, the receiving unit 27 can also be other devices that can be used to receive digital signals without limiting the scope of the present invention. In addition to the above differences, the third embodiment can also perform the operations and functions described in the first embodiment and the second embodiment, and those skilled in the art can directly understand how the third embodiment is based on the above-described first embodiment and the first embodiment. The second embodiment is intended to perform such operations and functions, and thus will not be described again.

The fourth embodiment of the present invention is a decryption descrambling device 2d as shown in Fig. 2D. In detail, the decryption descrambling device 2d of the fourth embodiment differs from the decryption descrambling device 2a of the first embodiment in that the capturing unit 22c of the decryption descrambling device 2d extracts the key 226 from the control data signal 220a1. Thereafter, the key 226 is passed back to the demultiplexing unit 22a. The demultiplexing unit 22a then transmits the data signal 220a, the audio signal 222a, the video signal 224a, and the playback control signal 227c calculated according to the key 226 to the descramble unit 22b. The descrambling unit 22b further calculates a control word code according to the key 226 and an algorithm. The descramble unit 22b can decrypt the descrambled data signal 220a, the audio signal 222a, and the video signal 224a according to the control word code. Next, the descramble unit 22b determines whether to decode the descrambled data signal 220b, the audio signal 222b, and the video signal 224b to the decompression unit 25 based on the playback control signal 227c. In addition to the above differences, the fourth embodiment can also perform the operations and functions described in the third embodiment, and those skilled in the art can directly understand how the fourth embodiment performs the operations and functions based on the above-described third embodiment. Therefore, I will not repeat them.

A fifth embodiment of the present invention is shown in Fig. 4, which is a decryption descrambling method for the decryption descrambling device as described in the first embodiment. The decryption descrambling device comprises a first transmission interface, a multiplex/demultiplexing module, an access control unit, a storage unit, a decompression unit and a playback unit. The multiplex/demultiplexing module further includes a demultiplexing unit, a descrambling unit, a capturing unit, and a multiplexing unit. The solution multiplexing unit is electrically connected to the first transmission interface; the descrambling unit and the demultiplexing unit are electrically connected; the capturing unit is electrically connected to the first transmission interface and the demultiplexing unit respectively; the multiplexing unit is respectively a transmission interface, a demultiplexing unit, and a descrambling unit are electrically connected; the access control unit is electrically connected to the demultiplexing unit and the multiplexing unit respectively; the storage unit is electrically connected to the access control unit; and the decompression unit and the solution are respectively The scrambling unit is electrically connected; and the playing unit is electrically connected to the decompressing unit.

The decryption descrambling device is configured to decrypt a descrambled digital signal, which is suitable for use with a signal receiving device. The signal receiving device is electrically connected to the decryption descrambling device and includes a decryption unit and a second transmission interface. The second transmission interface is electrically connected to the first transmission interface of the decryption and descrambling device; the decryption unit is electrically connected to the second transmission interface.

In addition, the decryption and descrambling method described in the fifth embodiment can also be performed by a computer program product when the playback device is via an electronic device (such as a computer, a calculator, a server, a PDA, an MP4, an MP5, a navigator, or the Internet). The fifth embodiment can be completed after loading the computer program product and executing a plurality of program instructions included in the computer program product, such as a TV box, a digital set-top box, a smart phone, a notebook computer, a small notebook, and the like. The decryption descrambling method described. The aforementioned computer program product can be stored in a recording medium readable by a playback device, such as a read only memory (KOM), a flash memory, a floppy disk, a hard disk, a compact disk, a flash drive, a memory card, or the like. A database of network access or any other storage medium known to those skilled in the art and having the same functionality.

Figure 4 is a flow chart depicting the decryption and descrambling method of the fifth embodiment. First, step 401 is executed to enable the first transmission interface to receive a digital signal and transmit the digital signal to the demultiplexing unit. Next, step 402 is executed to enable the demultiplexing unit to demultiplex the digital signal to generate a demultiplexed digital signal, wherein the demultiplexed digital signal includes a control data signal, and the demultiplexing unit is configured according to the control data. The signal produces a playback control signal. Next, step 403 is executed to enable the capturing unit to receive the control data signal and extract at least one key from the control data signal.

After the at least one key is retrieved, step 404 is performed to enable the decryption unit of the signal receiving device to receive the at least one key through the second transmission interface and the first transmission interface of the decryption descrambling device. Then, step 405 is executed to enable the decryption unit of the signal receiving device to calculate a control word according to the at least one key and an algorithm.

After step 405 is performed, step 406 is performed to enable the descrambling unit to receive the control word through the first transmission interface and the second transmission interface of the signal receiving device. Next, step 407 is executed to enable the descrambling unit to decrypt the descrambled multiplex bit signal according to the control word code, and generate a decryption descrambling signal, and transmit the decrypted descramble signal to the decompression unit according to the play control signal. Proceeding to step 408, the decompression unit decompresses the decrypted descrambling signal to generate a decompressed signal. Finally, step 409 is executed to enable the playing unit to play the decompressed signal.

In addition to the above steps, the decryption descrambling method may further comprise a step performed before step 401, the step of causing the signal receiving device to receive the digital signal. The first transmission interface of the decryption descrambling device receives the digital signal through a second transmission interface of the signal receiving device.

In addition, the foregoing decryption descrambling method may further comprise a step of causing the multiplex unit to multiplex the digital signal, the demultiplexed digital signal, and the decrypted descramble signal, or a combination thereof, to generate a multiplexed digital signal. . The step of causing the access control unit to compile the multiplexed bit signal into a standard file format signal. Having the storage unit receive and store one of the standard file format signals, wherein the multiplexed digital signal can be one of an encrypted scrambled signal and a decrypted descrambled signal, or a combination thereof, and each includes a playback control signal . The access control unit reads the standard file format signal from the storage unit, compiles the standard file format signal into the multiplexed digital signal, and transmits the multiplexed digital signal to one of the steps of the demultiplexing unit. And causing the demultiplexing unit to demultiplex the multiplexed digital signal to generate one of the steps of the demultiplexed digital signal.

In other embodiments, the decryption descrambling device further includes a receiving unit electrically connected to the first transmission interface. In this case, the decryption and descrambling method further includes the step of causing the receiving unit to receive the at least one key; and causing the decryption unit of the signal receiving device to receive the at least the second transmission interface and the first transmission interface of the decryption descrambling device. a step of a key; a step of causing the demultiplexing unit to receive a key through the receiving unit and generating a playback control signal according to the key; and causing the descrambling unit to determine whether to decrypt the decryption according to the playback control signal The subsequent data signal, audio signal, and video signal are transmitted to one of the steps of the decompression unit.

In another embodiment, the decryption descrambling device further comprises a receiving unit electrically connected to the demultiplexing unit. At this time, the foregoing decryption descrambling method further includes a step of causing the receiving unit to receive the digital signal.

In still another embodiment, the foregoing decryption descrambling method further comprises the step of causing the descrambling unit to calculate the control word according to the at least one key and an algorithm. And a step of causing the descrambling unit to transmit whether to decrypt the descrambled data signal, the audio signal, and the video signal to the decompression unit according to the playback control signal.

In addition to the above steps, the fifth embodiment can also perform the operations and functions described in the first embodiment, and those skilled in the art can directly understand how the fifth embodiment performs the operations and functions based on the above-described first embodiment. Therefore, I will not repeat them.

In summary, the present invention is coupled to a signal receiving device through a decryption descrambling device, and the decryption descrambling device decrypts and descrambles a digital signal. The signal receiving device is configured to receive the at least one key, calculate a control word according to the at least one key and an algorithm, and transmit the control word to the decryption descrambling device. After receiving the control word code, the decryption descrambling device decrypts the digital signal according to the control word code to generate a decryption descrambling signal, and determines whether to transmit the decryption descrambling signal according to a playback control signal. The decryption descrambling device then decompresses the decrypted descrambling signal to produce a decompressed signal. Finally, the decryption descrambling device plays the decompressed signal through a playback unit.

In this way, with the decryption descrambling device of the present invention, the manufacturer does not need to additionally configure a microcontroller/microprocessor descrambling unit in the signal receiving device, and does not need to write an application in the decryption descrambling device. After the controller/microprocessor descrambling unit decrypts the descrambled digital video/data content, the digital signal decryption and descrambling operation can be completed, and the decrypted and descrambled signal can be further controlled. In other words, the present invention overcomes the disadvantages of the prior art that requires additional hardware and software design costs, inability to effectively protect digital content, and compatibility issues between file formats.

The embodiments described above are only intended to illustrate the embodiments of the present invention, and to explain the technical features of the present invention, and are not intended to limit the scope of protection of the present invention. Any changes or equivalents that can be easily made by those skilled in the art are within the scope of the invention. The scope of the invention should be determined by the scope of the claims.

1. . . End products

100. . . Encrypted scrambled signal

101. . . Key signal

102. . . Decrypting descrambling signal

11. . . Receiving device

11a. . . Receiving unit

11b. . . Microcontroller descrambling unit

11c. . . Decryption chip

110. . . Control word

12. . . Playback device

2a. . . Decryption descrambling device

2b. . . Decryption descrambling device

2c. . . Decryption descrambling device

2d. . . Decryption descrambling device

twenty one. . . First transmission interface

twenty two. . . Multiplex/demultiplexing module

22a. . . Demultiplexing unit

22b. . . De-scrambling unit

22c. . . Capture unit

22d. . . Multiplex unit

220a. . . Data signal

220a1. . . Control data signal

220b. . . Data signal

222a. . . audio signal

222b. . . audio signal

224a. . . Video signal

224b. . . Video signal

226. . . Key

227a. . . Playback control signal

227b. . . Playback control signal

227c. . . Playback control signal

228a. . . Multiplex digital signal

228b. . . Multiplex digital signal

228c. . . Multiplex digital signal

twenty three. . . Access control unit

230a. . . Standard file format signal

230b. . . Standard file format signal

230c. . . Standard file format signal

twenty four. . . Storage unit

25. . . Decompression unit

250. . . Data signal

252. . . audio signal

254. . . Video signal

26. . . Play unit

27. . . Receiving unit

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. . . Bridge

36. . . Decryption unit

360. . . Control word

360. . . Control word

Figure 1 is a schematic diagram depicting a conventional end product;

2A is a schematic diagram of a decryption descrambling device according to a first embodiment of the present invention;

2B is a schematic diagram of a decryption descrambling device according to a second embodiment of the present invention;

2C is a schematic diagram of a decryption descrambling device according to a third embodiment of the present invention;

2D is a schematic diagram of a decryption descrambling device according to a fourth embodiment of the present invention;

Figure 3 is a schematic diagram of a signal receiving apparatus according to a first embodiment of the present invention;

Figure 4 is a flow chart of a fifth embodiment of the present invention.

Claims (34)

A decryption and descrambling device includes: a first transmission interface; a receiving unit, wherein one of the first transmission interface and the receiving unit is configured to receive a digital signal; and a multiplex/demultiplexing module includes a demultiplexing unit electrically coupled to the first transmission interface and the receiving unit for demultiplexing the digital signal to generate a demultiplexed digital signal; a descrambling unit The demultiplexing unit is electrically connected to receive a control word or calculate the control word according to at least one key and an algorithm, and descramble the solution according to the control word decryption (Decrypt). Multiplexed digital signals to generate a decrypted descrambling signal; and a multiplex unit electrically coupled to the first transmission interface, the demultiplexing unit, and the descrambling unit for multiplexing the digits a signal, the demultiplexed digital signal, and the decrypted descrambling signal to generate a multiplexed digital signal; an access control unit electrically coupled to the multiplexed unit for compiling the multiplexed digital signal (Compile) For a standard File format signal; a storage unit connected to the access control unit electrically for receiving and storing the file format standard signal. The decryption descrambling device of claim 1, wherein the access control unit is further electrically connected to the demultiplexing unit for reading the standard file format signal from the storage unit, and the standard file format signal is Compiled as the multiplexed bit letter And transmitting the multiplexed digital signal to the demultiplexing unit, the demultiplexing unit for demultiplexing the multiplexed digital signal to generate the demultiplexed digital signal. The decryption descrambling device of claim 1, wherein the decryption descrambling device is electrically connected to a signal receiving device, the signal receiving device is configured to receive the digital signal, and comprises the electrical property of the first transmission interface Connecting a second transmission interface, when receiving the digital signal by using the first transmission interface, the first transmission interface of the decryption descrambling device receives the digital signal through a second transmission interface of the signal receiving device. The decryption descrambling device of claim 3, wherein the signal receiving device further comprises a decryption unit electrically connected to the second transmission interface, wherein the decryption unit is configured to use the at least one key and the algorithm When the control word code is calculated, the descrambling unit of the decryption descrambling device receives the control word code from the demultiplexing unit through the first transmission interface and the second transmission interface of the signal receiving device, and receives the control word code from the demultiplexing unit. The control word is coded, and the demultiplexed digital signal is descrambled according to the control word code. The decryption descrambling device of claim 4, wherein the demultiplexed digital signal comprises a data signal, and the multiplex/demultiplexing module further comprises a capture unit, and the demultiplexed unit and The first transmission interface is electrically connected to receive the data signal, and the at least one key is extracted from the data signal, and the decryption unit of the signal receiving device transmits the second transmission interface and the decryption descrambling device A transmission interface receives the at least one key and calculates the control word based on the at least one key and the algorithm. The decryption descrambling device of claim 4, wherein the receiving unit is further electrically connected to the first transmission interface and configured to receive the at least one key, and the decryption unit of the signal receiving device transmits the second transmission interface and the Decryption descrambling device A transmission interface receives the at least one key and calculates the control word based on the at least one key and the algorithm. The decryption descrambling device of claim 5, wherein the demultiplexing unit is further configured to generate a play control signal according to the key calculation, and the descramble unit transmits the decryption descramble signal according to the play control signal. The decryption descrambling device of claim 5, wherein the demultiplexing unit is further configured to receive an added service key, and generate a play control signal according to the value added service key, and the descramble unit The decrypted descrambling signal is transmitted according to the playback control signal. The decryption descrambling device of claim 1, further comprising: a decompression unit electrically connected to the descrambling unit for decompressing the decrypted descrambling signal to generate a decompressed signal; and playing The unit is electrically connected to the decompression unit for playing the decompressed signal. A decryption and descrambling method for a decryption descrambling device, the decryption and descrambling device comprising a first transmission interface, a receiving unit, a multiplex/demultiplexing module, an access control unit, and a storage unit, The multiplexer/demultiplexing module includes a demultiplexing unit, a multiplexing unit, and a descrambling unit, and the demultiplexing unit is electrically connected to the first transmission interface and the receiving unit, and the descrambling unit Electrically connecting with the demultiplexing unit, the multi-function unit is electrically connected to the first transmission interface, the demultiplexing unit, and the descrambling unit, respectively, the access control unit and the multiplexing unit and the The storage unit is electrically connected, and the decryption and descrambling method comprises the following steps: (a) causing one of the first transmission interface and the receiving unit to receive a digital signal; (b) causing the demultiplexing unit to demultiplex the digital signal to generate a demultiplexed digital signal; (c) causing the descrambling unit to receive a control word or calculating the control based on the at least one key and an algorithm a character code, and decrypting the demultiplexed digital signal according to the control word code to generate a decryption descrambling signal; (d) causing the multiplex unit to multiplex the digital signal, the demultiplexed digital signal, and the decryption descrambling Signaling to generate a multiplexed digital signal; (e) causing the access control unit to compile the multiplexed digital signal into a standard file format signal; and (f) causing the storage unit to receive and store the standard file format signal. The decryption and descrambling method of claim 10, wherein the access control unit is further electrically connected to the demultiplexing unit, and the decryption and descrambling method further comprises the following steps: (g) causing the access control unit to The storage unit reads the standard file format signal, compiles the standard file format signal into the multiplexed digital signal, and transmits the multiplexed digital signal to the demultiplexing unit; and (h) causes the demultiplexed unit The multiplexed digital signal is multiplexed to generate the multiplexed digital signal. The decryption and descrambling method of claim 10, wherein the decryption descrambling device is electrically connected to a signal receiving device, and the signal receiving device comprises a second transmission interface electrically connected to the first transmission interface, The decryption descrambling method further comprises the steps of: (i) causing the signal receiving device to receive the digital signal; wherein, when the digital signal is received by the first transmission interface, the first transmission interface of the decryption descrambling device is transmitted through The second transmission interface of the signal receiving device receives the digital signal. The decryption and descrambling method of claim 12, wherein the signal receiving device further comprises a decryption unit electrically connected to the second transmission interface, the decryption and descrambling method further comprising the steps of: (j) causing the signal Decrypting unit of the receiving device calculates the control word according to the at least one key and the algorithm; wherein the descrambling unit of the decryption descrambling device transmits the first transmission interface and the signal receiving device to the demultiplexing unit After receiving the control word code, the second transmission interface receives the control word code from the demultiplexing unit, and decrypts the descrambled digital signal according to the control word code. The decryption and descrambling method of claim 13, wherein the demultiplexed digital signal comprises a data signal, and the multiplex/demultiplexing module further comprises a capture unit, and the demultiplexed unit and The first transmission interface is electrically connected, and the decryption and descrambling method further comprises the steps of: (k) causing the capturing unit to receive the data signal, and extracting the at least one key from the data signal; and (1) The decryption unit of the signal receiving device receives the at least one key through the second transmission interface and the first transmission interface of the decryption descrambling device; wherein the decryption unit of the signal receiving device is based on the at least one key and the calculation The method calculates the control word. The decryption and descrambling method of claim 13, wherein the receiving unit is further electrically connected to the first transmission interface, and the decryption and descrambling method further comprises the following steps: (m) causing the receiving unit to receive the at least one secret And (n) causing the decryption unit of the signal receiving device to receive the at least one key through the second transmission interface and the first transmission interface of the decryption descrambling device; wherein the decryption unit of the signal receiving device is At least one key And the algorithm calculates the control word. The decryption and descrambling method of claim 14, further comprising the steps of: (o) causing the demultiplexing unit to generate a play control signal according to the key calculation, and the descramble unit transmits the play control signal according to the play control signal The decryption descrambles the signal. The decryption and descrambling method of claim 14, further comprising the steps of: (p) causing the demultiplexing unit to receive an added service key, and generating a playback control signal according to the value added service key calculation; And the descrambling unit transmits the decryption descrambling signal according to the playback control signal. The decryption and descrambling method of claim 10, wherein the decryption and descrambling device further comprises a decompression unit and a playback unit, the decompression unit is electrically connected to the descrambling unit, and the playback unit is coupled to the The decompression unit is electrically connected, and the decryption descrambling method further comprises the steps of: (s) causing the decompression unit to decompress the decryption descrambling signal to generate a decompressed signal; and (t) causing the playback unit to play the Decompress the signal. A method for decrypting and descrambling a digital signal, the deployment method being suitable for use with a decryption descrambling device and a signal receiving device, the decryption descrambling device being electrically connected to the signal receiving device, the decrypting descrambling device a first transmission interface, a receiving unit, a multiplex/demultiplexing module, an access control unit, and a storage unit, the multiplex/demultiplexing module including the first transmission interface and the receiving The unit is electrically connected to the multiplex unit and the descramble unit. The signal receiving device includes a decryption unit, and the access control unit is electrically connected to the multiplex/demultiplex module and the storage unit respectively. The deployment method includes the following steps: (a) causing the decryption descrambling device to pass the first transmission interface and the receipt One of the elements receives the digital signal and utilizes the demultiplexing unit to demultiplex the digital signal to generate a demultiplexed digital signal; (b) causing the signal receiving device to receive at least one key; (c) The decrypting unit of the signal receiving device calculates a control word code according to the at least one key and an algorithm; (d) causing the signal receiving device to transmit the control word code to the demultiplexing unit of the decryption descrambling device; The descrambling unit of the decryption descrambling device receives the control word code from the demultiplexing unit, and decrypts the descrambled digital signal according to the control word code to generate a decryption descrambling signal; (f) The multiplex/demultiplexing module generates a multiplexed digital signal based on the digital signal; (g) causing the access control unit to compile the multiplexed digital signal into a standard file format signal; and (h) causing the storage The unit receives and stores the standard file format signal. The deployment method of claim 19, further comprising the steps of: (i) causing the access control unit to read the standard file format signal from the storage unit, and compiling the standard file format signal into the multiplexed digital signal, And transmitting the multiplexed digital signal to the multiplex/demultiplexing module; and (j) causing the multiplex/demultiplexing module to descramble the multiplexed digital signal according to the control word code to generate the decryption De-scramble signal. The method of claim 19, further comprising the step of: (a1) causing the signal receiving device to receive the digital signal and transmitting the digital signal to the decryption descrambling device, The descrambling of the work/demultiplexing module The unit decrypts the digital signal according to the control word code to generate the decrypted descrambling signal. The deployment method of claim 19, wherein the multiplex/demultiplexing unit further comprises a capturing unit, and the deploying method further comprises the following steps before step (b): (b1) making the multiplex/solution The capturing unit of the multiplex module extracts the at least one key from the digital signal, and transmits the at least one key to the signal receiving device, and the decrypting unit calculates the at least one key and the algorithm according to the algorithm The control word. The method of claim 19, wherein the receiving unit is further electrically connected to the signal receiving device, and the deploying method further comprises the following steps before the step (b): (b1) causing the receiving unit to receive the at least one Key, and transmitting the at least one key to the signal receiving device, and the decrypting unit calculates the control word according to the at least one key and the algorithm. The deployment method of claim 19, further comprising the steps of: (f) causing the multiplex/demultiplexing module to generate a playback control signal according to the key calculation, wherein the multiplex/demultiplexing module is The playback control signal transmits the decrypted descrambling signal. The deployment method of claim 19, further comprising the steps of: (f) causing the multiplex/demultiplexing module to receive an added service key, and generating a playback control signal according to the added service key calculation. The multiplex/demultiplex module transmits the decrypted descrambling signal according to the playback control signal. A computer program product storing a program for decrypting and descrambling a decryption descrambling device, the decryption descrambling device comprising a first transmission interface, a receiving unit, a multiplex/demultiplexing module, and a Access control unit and a storage list The multiplex/demultiplexing module includes a demultiplexing unit, a multiplexing unit, and a descrambling unit. The demultiplexing unit is electrically connected to the first transmission interface and the receiving unit. The splicing unit is electrically connected to the multiplexing unit, and the multiplex unit is electrically connected to the first transmission interface, the demultiplexing unit and the descrambling unit, respectively, and the access control unit and the multiplex unit respectively And the storage unit is electrically connected, and the program is loaded into the decryption and descrambling device via a computer: a program command A, wherein one of the first transmission interface and the receiving unit receives a digital signal; B, causing the demultiplexing unit to multiplex the digital signal to generate a demultiplexed digital signal; a program instruction C, causing the descrambling unit to receive a control word code or calculate the method according to at least one key and an algorithm Controlling the character code, and decrypting the demultiplexed digital signal according to the control word code to generate a decryption descrambling signal; a program instruction D, causing the multiplex unit to multiplex the digital signal, the demultiplexed digital signal, and the Decrypt Disturbing a signal to generate a multiplexed digital signal; a program command E for causing the access control unit to compile the multiplexed digital signal into a standard file format signal; and a program command F for causing the storage unit to receive and store the signal Standard file format signal. The computer program product of claim 26, wherein the access control unit is further electrically connected to the demultiplexing unit, the program further comprising: a program command G, wherein the access control unit reads from the storage unit Taking the standard file format signal, compiling the standard file format signal into the multiplexed digital signal, and transmitting the multiplexed digital signal to the demultiplexing unit; A program command H causes the demultiplexing unit to multiplex the multiplexed digital signal to generate the multiplexed digital signal. The computer program product of claim 26, wherein the decryption descrambling device is electrically connected to a signal receiving device, the signal receiving device comprising a second transmission interface electrically connected to the first transmission interface, The program further includes: a program command I, wherein the signal receiving device receives the digital signal; wherein when the digital signal is received by the first transmission interface, the first transmission interface of the decryption descrambling device transmits the signal receiving device The second transmission interface receives the digital signal. The computer program product of claim 28, wherein the signal receiving device further comprises a decryption unit electrically connected to the second transmission interface, the program further comprising: a program command J for decrypting the signal receiving device The unit calculates the control word according to the at least one key and the algorithm; wherein the descrambling unit of the decryption descrambling device receives the descrambling unit through the first transmission interface and the second transmission interface of the signal receiving device After the control word code, the control word code is received from the demultiplexing unit, and the demultiplexed digital signal is descrambled according to the control word code. The computer program product of claim 29, wherein the multiplexed digital signal comprises a data signal, and the multiplex/demultiplexing module further comprises a capture unit, and the multiplexed unit and the The first transmission interface is electrically connected, the program further includes: a program command K, the picking unit receives the data signal, and extracts the at least one key from the data signal; and a program command L, the signal is obtained The decryption unit of the receiving device transmits the first The second transmission interface and the first transmission interface of the decryption descrambling device receive at least one of the keys; wherein the decryption unit of the signal receiving device calculates the control word according to the at least one key and the algorithm. The computer program product of claim 29, wherein the receiving unit is further electrically connected to the first transmission interface, the program further comprising: a program command M, the receiving unit receiving the at least one key; and a The program instruction N causes the decryption unit of the signal receiving device to receive the at least one key through the second transmission interface and the first transmission interface of the decryption descrambling device; wherein the decryption unit of the signal receiving device is based on the at least one The key and the algorithm calculate the control word. The computer program product of claim 30, the program further comprising: a program command O, wherein the demultiplexing unit generates a play control signal according to the key calculation, and the descramble unit transmits the play control signal according to the play control signal Decrypt the descrambling signal. The computer program product of claim 30, the program further comprising: a program instruction P, the demultiplexing unit receiving an added service key, and generating a playback control signal according to the value added service key calculation, The descrambling unit transmits the decrypted descrambling signal according to the playback control signal. The computer program product of claim 26, wherein the decryption descrambling device further comprises a decompression unit and a playback unit, the decompression unit being electrically connected to the descrambling unit, the playback unit and the solution The compression unit is electrically connected, and the program further comprises: a program instruction S, wherein the decompression unit decompresses the decryption descrambling signal, To generate a decompressed signal; and a program command T to cause the playback unit to play the decompressed signal.