CN103377322B - DRM protection device and DRM method for using license - Google Patents
DRM protection device and DRM method for using license Download PDFInfo
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- CN103377322B CN103377322B CN201210126609.4A CN201210126609A CN103377322B CN 103377322 B CN103377322 B CN 103377322B CN 201210126609 A CN201210126609 A CN 201210126609A CN 103377322 B CN103377322 B CN 103377322B
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Abstract
The present invention discloses a kind of DRM protection device and the using method of DRM licence; DRM protection device is connected with communication terminal by audio devices or USB device; can be directly authenticated by digital signal interaction data by USB interface; can also be by the process of signal processing module, audio signal interaction data is authenticated；The present invention is by above technical scheme; the payment devices solving prior art sound intermediate frequency interface is incompatible with the DRM protection device interface of USB interface; the mode processing data is the most different; different types of terminal must coordinate different types of DRM protection device to be authenticated, and is not easy to the problem that user is authenticated；Utilizing audio signal interaction data simultaneously before signal processes, also include that the Mike pole to audio interface and earth polar are identified, in solution audio interface, Mike pole and earth polar are not fixed, the problem causing cannot be carried out data communication.
Description
Technical field
The present invention relates to digital copyright management field, particularly relate to be realized by audio interface and/or USB interface
DRM protection device and DRM license file using method.
Background technology
DRM (Digital Rights Management, digital copyright management) is based on information security technology comprehensive
Solution, it is possible to effectively stop illegally using and copying digital media file, reaches protection numeral
The purpose of intellectual property.Along with the arrival of digital times, DRM becomes more and more important, and DRM is
Become basis and the guarantee of the development of digitized content.
DRM licence, is typically stored on computer, and uses with computer binding, and user can only
The computer of storage DRM licence uses DRM licence, other computers cannot use；
Also have and DRM licence is stored mobile memory, be then connected use DRM with computer by USB
Licence, it addition, also have DRM protection device to be connected use DRM with terminal perhaps by audio signal
Can demonstrate,prove.
Due to the DRM protection device of audio interface and the DRM protection device of USB interface incompatible,
The most different to the processing mode of data, user to use the different types of DRM protection device could be in inhomogeneity
The terminal of type uses DRM license file, brings greatly inconvenient to the use of user.
Summary of the invention
The DRM protection device of present invention offer and the using method of DRM licence, both can pass through sound
Frequently interface is connected and can also be connected by USB interface, it is possible to use DRM licence at different types of terminals
File, solves existing different types of terminals and must use different types of DRM protection device, uses to user
The problem made troubles.
For solve above-mentioned technical problem, the present invention by the following technical solutions:
A kind of DRM protection device, is used for protecting digital rights information, at security authentication module, signal
Reason module and usb interface module；Described DRM protection device passes through signal processing module and/or USB
Interface module is connected with communication terminal；Described signal processing module, is connected to security authentication module, for DRM
When protection device is connected with communication terminal by signal processing module, receive the audio signal that communication terminal sends,
And convert audio signals into digital signal and export described security authentication module, and from safety certification mould
The digital signal that block receives is converted to audio signal and exports communication terminal；Described usb interface module, connects
Security authentication module, when DRM protection device is connected with communication terminal by usb interface module, connects
Receive digital signal that communication terminal sends and be forwarded to described security authentication module, and receiving described safety and recognize
Demonstrate,prove the digital signal of module transmission and be forwarded to described communication terminal；Described security authentication module, is used for receiving
Certification solicited message also uses DRM licence to be authenticated.
In an embodiment of the present invention, this signal processing module includes: audio interface microphone pole and the control in earth polar
Molding block, audio signal reception unit, the first audio signal modular converter, the second audio signal modular converter
With audio signal transmitting element, described audio signal reception unit docks with the sound channel pole of audio interface, wherein,
The control module in described audio interface microphone pole and earth polar is used for the Mike pole to described audio interface and ground
Pole is identified, and is docked with the Mike pole identified by described audio signal transmitting element, by earth potential and knowledge
The earth polar docking not gone out；Described audio signal reception unit is for receiving by the sound channel pole of described audio interface
Audio signal from described audio frequency apparatus；Described first audio signal modular converter is used for will be from described sound
Frequently the audio signal of equipment is converted to digital signal；Described second audio signal modular converter will be for treating to institute
The digital signal stating audio frequency apparatus transmission is converted to audio signal；Described audio signal transmitting element is used for passing through
The audio frequency letter that the digital signal sent to described audio frequency apparatus is converted into will be treated in the Mike pole of described audio interface
Number send to described audio frequency apparatus.
In an embodiment of the present invention, this second audio signal modular converter is current mode D/A converter module.
In an embodiment of the present invention, this current mode D/A converter module is by from the Mike of described audio interface
The audio signal that the mode of pole extraction electric current will convert into sends to described audio frequency apparatus.
In an embodiment of the present invention, the control module in this audio interface microphone pole and earth polar includes: obtain mould
Block, is used for obtaining described audio frequency apparatus after opening recording channel, a pair audio frequency input pole in its audio interface
In the signal of telecommunication of each pole；Identification module, for knowing according to the signal of telecommunication of each pole in the input extremely of the pair of audio frequency
The most described Mike pole and earth polar；Port handover module, identifies Mike pole and earth polar for described identification module
Afterwards, described audio signal transmitting element is docked with described Mike pole, earth potential is docked with described earth polar.
In an embodiment of the present invention, this acquisition module is voltage domain modular converter, at the pair of sound
Frequency input sets up current channel between pole, ground reference is accessed in the node of described current channel, obtains
In the input extremely of the pair of audio frequency, each pole is relative to the voltage relative value of described ground reference.
In an embodiment of the present invention, this identification module includes the first identification submodule, is used for detecting described one
To the positive negative characteristic of the voltage relative value of each pole in audio frequency input extremely, according to Mike pole described in testing result identification
With described earth polar.This identification module also includes the second identification submodule, for the pair of audio frequency is inputted pole
In the voltage relative value of each pole compare with described ground reference respectively, divide according to respective comparative result
Do not export a digital signal level；Logic judgment module, for identifying submodule output according to described second
Mike pole and described earth polar described in two digital signal level identifications.
In an embodiment of the present invention, this DRM protection device and communication terminal by signal processing module and
Usb interface module connects, and prioritizing selection transmits digital signal by usb interface module.
In an embodiment of the present invention, this security authentication module is additionally operable to repair DRM license information
Change.
In an embodiment of the present invention, this DRM protection device also includes memory expansion module, is used for storing
DRM license file.
A kind of DRM protects system, including aforesaid DRM protection device and communication terminal, described communication
Terminal is connected by signal processing module and/or usb interface module with described DRM protection device, is used for protecting
Deposit digital media file and use digital media file according to DRM authentication result；Described DRM protection device,
For preserving DRM licence and certification request being authenticated.
A kind of DRM method for using license, including: communication terminal and DRM protection device are by signal
Reason module and/or usb interface module connect；Communication terminal sends certification solicited message to DRM protection device
Security authentication module；Wherein, described certification solicited message is sent by digital signal and/or audio signal；
Described security authentication module uses DRM license file to be authenticated with the certification solicited message received；Institute
State security authentication module and authentication result is sent to described communication terminal by digital signal and/or audio signal；
Described communication terminal uses digital media information according to described authentication result.
In an embodiment of the present invention, communication terminal and DRM protection device are by usb interface module and letter
Number processing module connects, and prioritizing selection usb interface module passes through digital data transmission data.
In an embodiment of the present invention, described communication terminal and described DRM protection device are by signal processing mould
Block connects, and also includes: be identified Mike pole and earth polar in audio interface, by audio signal transmitting element
Dock with the Mike pole identified, earth potential is docked with the earth polar identified, by audio signal reception unit
Dock with the sound channel pole of audio interface；Communication terminal sends certification solicited message and includes to DRM protection device:
Message processing module receives audio signal that described communication terminal sends and is converted to digital signal and exports described
Security authentication module；Authentication result is sent to communication terminal and includes: will treat the number sent to described communication terminal
Word signal is converted to audio signal by signal processing module and is sent to communication terminal.
In an embodiment of the present invention, current mode D/A converter module is used will to treat to send to described audio frequency apparatus
Digital signal be converted to audio signal.
In an embodiment of the present invention, described current mode D/A converter module is by from the wheat of described audio interface
The audio signal that the mode of gram pole extraction electric current will convert into sends to described audio frequency apparatus.
In an embodiment of the present invention, Mike pole and earth polar in audio interface are identified, by audio signal
Transmitting element docks with the Mike pole identified, and the method that earth potential docks with the earth polar identified is included:
Obtain described communication terminal opening behind recording channel, each pole in a pair audio frequency input extremely in its audio interface
The signal of telecommunication；According to Mike pole and earth polar described in the signal of telecommunication identification of each pole in the input extremely of the pair of audio frequency；Will
Described audio signal transmitting element docks with described Mike pole, is docked with described earth polar by earth potential.
In an embodiment of the present invention, the method for the signal of telecommunication of each pole in the input extremely of the pair of audio frequency that obtains is:
Between the pair of audio frequency input pole, set up current channel, ground reference is accessed described current channel
In node, obtain in the input extremely of the pair of audio frequency each pole relative to the voltage relative value of described ground reference.
In an embodiment of the present invention, according to the signal of telecommunication identification Mike of each pole in the input extremely of the pair of audio frequency
The method in pole and earth polar is: by the pair of audio frequency input extremely in each pole voltage relative value respectively with described ginseng
Examine earth potential to compare, respectively obtain a digital signal level according to respective comparative result；According to obtaining
Two digital signal level identifications described in Mike pole and described earth polar.
In an embodiment of the present invention, also include downloading digital media file and DRM license file, described
Digital media file preserves on communication terminals, and described DRM licence exports DRM by ciphertext form
Protection device stores.
In an embodiment of the present invention, after authentication result is sent to described signal processing module, safety is recognized
The DRM file of storage is modified by card module.
The beneficial effects of the present invention is, DRM protection device is connected by audio interface or USB interface,
Can compatible different terminal unit, apply in most of communication terminals, meet user and use different DRM
Protection device protection digital rights information；Meanwhile, before utilizing audio interface to carry out data communication, the most right
In audio interface, Mike pole and earth polar are identified so that the present invention can more preferably compatible existing different audio frequency
Interface.
Accompanying drawing explanation
The schematic diagram of the DRM protection device that Fig. 1 provides for the technical program embodiment；
Fig. 2 is the schematic diagram of signal processing module in DRM protection device shown in Fig. 1；
Fig. 3 is the signal of the control module in signal processing module sound intermediate frequency interface Mike pole shown in Fig. 2 and earth polar
Figure；
Fig. 4 is another of the control module in signal processing module sound intermediate frequency interface Mike pole shown in Fig. 2 and earth polar
Schematic diagram；
Fig. 5 is another of the control module in signal processing module sound intermediate frequency interface Mike pole shown in Fig. 2 and earth polar
Schematic diagram；
Fig. 6 is the schematic diagram of the first audio signal modular converter in signal processing module shown in Fig. 2；
Fig. 7 is the schematic diagram of the second audio signal modular converter in signal processing module shown in Fig. 2；
The schematic diagram of the DRM protection system that Fig. 8 provides for the technical program embodiment；
Fig. 9 is the flow chart of the protection system DRM method for using license of DRM shown in Fig. 8；
Figure 10 is the flow chart of the signal processing method of signal processing module shown in Fig. 8.
Figure 11 is the flow chart of protection system DRM another using method of licence of DRM shown in Fig. 8；
Detailed description of the invention
The central scope of the present invention is, utilizes the audio interface of terminal unit or USB interface to connect DRM and protect
Protection unit so that DRM protection device can be applicable to the terminal unit of different communication interface type, is having
The terminal of USB interface connects use digital rights file by USB interface, leads in the terminal having audio interface
Cross audio signal and connect use digital rights file.Before utilizing audio interface to carry out data communication, first to sound
Frequently in interface, Mike pole and earth polar are identified, then by the audio signal transmitting element in external equipment and identification
The Mike pole docking gone out, docks the earth potential of external equipment with the earth polar identified, after correct docking,
Between external equipment and communication terminal, carry out data communication in conjunction with digital-to-analogue/analog digital conversion, make DRM protection dress
Put and can generally use on different communication terminals.
As it is shown in figure 1, the schematic diagram of the DRM protection device provided for the technical program embodiment；This DRM
Protection device includes security authentication module 1, signal processing module 3 and usb interface module 8；Described letter
Number processing module 3, is connected to security authentication module 1, passes through signal processing module for DRM protection device
3 when being connected with communication terminal, receives audio signal, and convert audio signals into digital signal and export described
Security authentication module 1, and the digital signal received from security authentication module 1 is converted to audio signal output
To communication terminal；Described usb interface module 8, attachment security authentication module 1, for DRM protection device
When being connected with communication terminal by usb interface module 8, receive the digital signal of communication terminal transmission and forward
To described security authentication module, and receive the digital signal of described security authentication module 1 transmission and be forwarded to
Described communication terminal；Described security authentication module 1, is used for receiving certification solicited message and using DRM to permit
Authentication information is authenticated by card.Described DRM protection device can use power module 4 to be powered；?
When carrying out DRM certification, DRM protection device by signal processing module 3 or usb interface module 8 with
Communication terminal is attached；Described communication terminal can include computer, mobile phone, notebook, panel computer
Deng terminal unit.
Described DRM protection device only by signal processing module 3 connect communication terminal be authenticated time, letter
Number processing module 3 receives the certification solicited message that audio frequency apparatus sends, and described certification solicited message passes through audio frequency
Signal transmits, and the audio signal (certification solicited message) that described signal processing module 3 receives is converted to number
The certification solicited message of word signal also exports in described security authentication module 1；Described security authentication module 1
Certification solicited message is authenticated by the DRM license file using storage, and authentication result is exported institute
State in signal processing module 3；Authentication result is converted to audio signal, then by described signal processing module 3
It is sent in described audio frequency apparatus for audio frequency apparatus according to authentication result Digital Media literary composition by audio interface
Part.Digital media file can on different audio frequency apparatuses copying and saving, it is possible to use same DRM permitted
Can demonstrate,prove and be authenticated using digital media file.
Described DRM protection device only by usb interface module 8 connect communication terminal be authenticated time,
The certification solicited message that communication terminal sends can directly be arrived with digital data transmission by usb interface module 8
The security authentication module 1 of DRM protection device；Described security authentication module 1 uses the DRM license of storage
Certification solicited message is authenticated processing by card, and then authentication result can also be straight by usb interface module 8
Connect and in the way of digital signal, be transferred to described communication terminal for communication terminal according to authentication result numeral matchmaker
Body file.
Connect logical by usb interface module 8 and message processing module 3 in described DRM protection device simultaneously
During letter terminal, prioritizing selection carries out data interaction by usb interface module 8, and so, data need not be changed
Directly send with digital signal, it is possible to increase the efficiency of data transmission.Certainly, however it is not limited to select USB to connect
Mouth die block 8 carries out data interaction, it is also possible to select signal processing module 3 to carry out data interaction, even basis
Rule set in advance transmits data simultaneously.The mode selected can be by first connecting effective manner, the most such as
What first fruit connected is that usb interface module 8 is then carried out by the way of usb interface module 8 is with digital signal
Data exchange, if first connecting audio interface, then pass through voice-frequency signalling by signal processing module 3
Carry out data exchange.Can also prioritizing selection usb interface module 8, as long as i.e. there being USB to connect, then pass through
The data exchange that signal processing module 3 connects is invalid, only carries out data exchange by digital form.Certainly,
If connected by usb interface module 8 and signal processing module 3, it is also possible to by two modules simultaneously
Distribution carries out data interaction simultaneously.
So, DRM protection device is not limited to be connected by USB interface on computers, is also not necessarily limited to
Connected by audio interface at mobile terminal, it is possible to apply in most of different types of communication terminals, can
To be greatly promoted the DRM protection device compatibility to dissimilar communication terminal, meet user different types of
DRM certification demand.
In another embodiment, described security authentication module 1 can also be repaiied according to DRM license management agreement
Change the DRM license information of storage, including limiting the time used according to Digital Media, or allow to open
Number of times etc., delete according to the rules, DRM licence lost efficacy after be automatically deleted wait operate.
In another embodiment, described DRM protection device can also include memory expansion unit 2, described interior
Deposit expansion module for storing DRM license file；So, described DRM protection device can preserve literary composition
The DRM license file that part is bigger, it is also possible to simultaneously preserve multiple DRM license file.Improve
DRM protection device adapts to the demand that different digital media files is authenticated.
As in figure 2 it is shown, for the schematic diagram of signal processing module in DRM protection device shown in Fig. 1；This signal
Processing module include the control module 31 in audio interface microphone pole and earth polar, audio signal reception unit 32,
One audio signal modular converter the 33, second audio signal modular converter 34 and audio signal transmitting element 35.
The control module 31 in audio interface microphone pole and earth polar is for knowing Mike pole and the earth polar of audio interface
Not, after identification, the earth potential of signal processing module equipment of itself is docked with the earth polar identified, with system
The ground reference of one signal processing module and audio frequency apparatus, by audio signal transmitting element 35 with identify
Mike pole is docked, to set up the signal processing module sendaisle to audio frequency apparatus transmission data.Due to audio frequency
In interface, the position of sound channel pole (including left/right/MOMO sound channel) is usually fixed, and therefore, outside sets
The sound channel pole of the audio signal reception unit in Bei and audio interface, can after recording channel opened by audio frequency apparatus
To be automatically performed docking, set up signal processing module and receive the reception passage of data from audio frequency apparatus.Audio frequency is believed
Number receive unit 32 for receiving the audio signal from audio frequency apparatus by the sound channel pole of audio interface, will connect
The audio signal transmission received is used for the first audio signal modular converter 33, the first audio signal modular converter 33
This audio signal from audio frequency apparatus is converted to digital signal, and the second audio signal modular converter 34 is used for
To treat that the digital signal sent to audio frequency apparatus is converted to audio signal, audio signal sends single 35 and is used for passing through
The audio signal being converted into via the second audio signal modular converter 34 is set by the Mike pole of audio interface to audio frequency
Preparation is sent.
As it is shown on figure 3, for the interface Mike pole of signal processing module sound intermediate frequency shown in Fig. 2 and the control mould in earth polar
A kind of implementation of block 1, it includes acquisition module 131, identification module 132 and port handover module 133.
Wherein, after acquisition module 131 is used for obtaining audio frequency apparatus unlatching recording channel, a pair sound in its audio interface
The signal of telecommunication of each pole in frequency input extremely, identification module 132 is for the two poles of the earth got according to acquisition module 131
Signal of telecommunication identification Mike pole and earth polar, port handover module 133, identify Mike for identification module 132
After pole and earth polar, automatically the earth potential of signal processing module equipment of itself is docked with the earth polar identified,
With the ground reference of unified signal processing module Yu audio frequency apparatus, automatically by audio signal transmitting element 35 with
The Mike pole identified.
As shown in Figure 4, for the interface Mike pole of signal processing module sound intermediate frequency shown in Fig. 2 and the control mould in earth polar
The another kind of implementation of block 1.Submodule 142 is identified including voltage domain modular converter 141 and first.Voltage
After territory modular converter 141 opens recording channel by existing audio frequency apparatus, Mike has the electricity higher than earth polar
Press this precondition, between this pair audio frequency input pole in its audio interface, set up current channel, will
Ground reference accesses in the node of this current channel, obtains in this pair audio frequency input extremely each pole relative to this
The voltage relative value of ground reference, wherein ground reference refer to external equipment, control module commonly
Current potential, owing to audio frequency apparatus is opened behind recording channel, Mike has the voltage higher than earth polar, therefore,
On this current channel that voltage domain modular converter 141 is set up, electric current must be to flow to earth polar from Mike pole,
Ground reference is 0, then Mike pole is set on the occasion of, ground relative to the voltage relative value one of this ground reference
Pole is set to negative value relative to the voltage relative value one of this ground reference, therefore, and voltage domain modular converter 141
Output is a positive voltage relative value and a negative voltage relative value.First identifies that submodule 142 leads to
The positive negative characteristic crossing detection voltage relative value identifies Mike pole and earth polar, and positive one extremely Mike pole is negative
One extremely earth polar.
As it is shown in figure 5, for the interface Mike pole of signal processing module sound intermediate frequency shown in Fig. 2 and the control mould in earth polar
The another kind of implementation of block 1.This embodiment is different from the place of embodiment illustrated in fig. 4 and is, uses the
Two identify that submodule 141 and logic judgment module 152 substitute the first identification submodule of embodiment illustrated in fig. 4
152, i.e. the control module 1 in this embodiment sound intermediate frequency interface Mike pole and earth polar includes voltage domain modular converter
141, second submodule 151 and logic judgment module 152 are identified.Voltage domain modular converter 141 still by
After recording channel opened by existing audio frequency apparatus, Mike has this precondition of voltage higher than earth polar,
Set up current channel between this pair audio frequency input pole in its audio interface, ground reference is accessed this electricity
In the node of circulation road, obtain in this pair audio frequency input extremely each pole relative to the voltage phase of this ground reference
To value.Second identifies that submodule 151 includes that two comparison modules, the first comparison module 151a and second compare mould
Block 151b, the first comparison module 151a for a voltage relative value that voltage domain modular converter 141 is exported with
Ground reference compares, and exports a digital signal level according to comparative result；Second comparison module 151b
Another voltage relative value for being exported by voltage domain modular converter 141 compares with ground reference, root
Another digital signal level is exported according to comparative result.Logic judgment module 152 is for according to the first comparison module
The digital signal level identification Mike pole of 151a and the second comparison module 151b output and earth polar.Assume the first ratio
The comparison rule of relatively module 151a and the second comparison module 151b is, when voltage relative value is more than with reference to ground electricity
During position, output level 1, when voltage relative value is less than ground reference, output level 0 (in actual application,
May be reversed), then when the first comparison module 151a and the second comparison module 151b output is all level
When 0, show that audio frequency apparatus is not also opened the plug of recording channel or external equipment and is also not inserted into audio interface
In, when any one export be level 1 time, show that audio frequency apparatus has turned on recording channel, logical judgment
A pole corresponding to level 1 is identified as Mike pole by module 152, is identified as the pole corresponding to level 0
Earth polar.
As shown in Figure 6, real for the one of the first audio signal modular converter in signal processing module shown in Fig. 2
Execute mode.Including DC converting module 331 and comparison module 332.This embodiment is applicable to a channel transfer
Data, are also applied for two sound channels and transmit data simultaneously, when using two sound channels to transmit data simultaneously, its
The data volume of transmission of same time period is the twice using a channel transfer.Corresponding to the sound in audio interface
Road number, sets the sub-comparison module of corresponding number in comparison module 332, the present embodiment sets corresponding left sound
The sub-comparison module 332a in road and the sub-comparison module 332b of corresponding R channel.Due to from the sound channel of audio interface
The usually ac voltage signal of pole output, therefore, DC converting module 331 is for by audio signal reception
The audio signal conversion direct current signal of the alternating voltage form that unit 32 receives from the sound channel pole of audio interface.Excellent
Choosing, DC converting module 331 carries out clamped function with to input signal centered level, makes left and right sound
The AC signal that road is original, becomes the signal having certain DC component, and concrete mode may is that in sound channel pole
On the ac voltage signal of output, the DC voltage VDC_A that superposition is positive, preferred VDC_A are power supply electricity
Pressure VDD half, and two sound channel poles of audio interface are connected a resistance to, the resistance of connected resistance is excellent
Choosing for 32 Ω or 16 Ω.The sub-comparison module 332b of sub-comparison module 332a and corresponding R channel is used for will
The direct current signal that DC converting module 331 is converted into compares with the above-mentioned DC voltage VDC A superposed,
Send comparative result, if the direct current signal that DC converting module 31 is converted into is more than VDC_A, then export
High level, otherwise output low level.
As it is shown in fig. 7, it is real for the one of the second audio signal modular converter 34 in signal processing module shown in Fig. 2
Execute mode.Second audio signal modular converter 34 uses and fills current mode DAC, and it is sent out to audio frequency apparatus according to treating
The digital signal sent, from the electric current of the Mike pole of audio interface extraction change, due to wheat in existing audio interface
Gram extremely going up and would generally connect a resistance, when the electric current of extraction changes, the voltage that Mike extremely goes up is along with change
Change, by changing the voltage that Mike extremely goes up, it is achieved the conversion of digital signal to audio signal, be simultaneously achieved
Audio signal inputs audio frequency apparatus from Mike pole.
As it is shown in figure 9, for DRM method for using license flow chart in the system of DRM protection shown in Fig. 8,
Its flow process includes:
S00, connect DRM protection device and communication terminal by audio devices；
S02, communication terminal send certification solicited message, by self software, certification solicited message are converted to sound
Frequently signal exports described DRM protection device.
S04, signal processing module 3 receive described certification solicited message, and described certification solicited message is converted to
Digital signal, and export in described security authentication module 1；
S06, security authentication module 1 transfer the DRM license file of storage, to the certification request received
Information is authenticated；Wherein, described transferred DRM license file can be stored in safety certification mould
In the storage element of block 1, it is also possible to be stored in internal memory and expand in storing module 2；
S08,1 authentication result of security authentication module are sent in described signal processing module 3；
S10,3 authentication results of signal processing module are converted to audio signal and are sent in communication terminal；
S12, communication terminal use digital media file according to authentication result.
As shown in Figure 10, for the flow chart of signal processing method of signal processing module shown in Fig. 8；Concrete step
Suddenly include:
Mike pole and the earth polar of audio interface are entered by the control module 1 in S000, audio interface microphone pole and earth polar
Row identifies, after identification, is docked with the earth polar identified by the earth potential of signal processing module equipment of itself,
With the ground reference of unified signal processing module Yu communication terminal, by audio signal transmitting element 5 and identification
The Mike pole docking gone out, to set up the passage sending data to communication terminal.
Receiving on passage:
S001, audio signal reception unit 2 receive the sound from communication terminal by the sound channel pole of audio interface
Frequently signal, by the audio signal transmission of reception to the first audio signal modular converter 3.Should be from communication terminal
Audio signal obtains via after communication terminal framing, coding and digital-to-analogue conversion.
This audio signal from communication terminal is converted to numeral by S002, the first audio signal modular converter 3
Signal, exports the digital signal after conversion to decoder module 7.Before transmission to decoder module 7, preferably
, by filter burr module to the digital signal after conversion.
The digital signal that audio signal from communication terminal is converted into by S003, decoder module 7 solves
Code, by decoded digital data transmission to solving frame module 9.
S004, solution frame module 9 digital signal decoded to decoder module 7 carry out solving frame, obtain after solution frame
Data cache, or send to other processing modules and carry out Business Processing.
On sendaisle:
S011, framing module 8 are taken out from caching or are obtained from other processing modules and treat to send to communication terminal
Digital signal, to this treat to communication terminal send digital signal carry out framing, by after framing numeral letter
Number input to coding module 6.
The numeral treating to send to communication terminal through framing that framing module 8 is exported by S012, coding module 6
Signal encodes, and inputs the digital signal after coding to the second audio signal modular converter 4.
S013, the second audio signal modular converter 4 are by the encoded digital signal treating to send to communication terminal
Being converted to audio signal, transmission is to audio signal transmitting element 5.
S014, audio signal transmitting element 5 will be turned via the second audio signal by the Mike pole of audio interface
The audio signal that die change block 4 is converted into sends to communication terminal.After communication terminal receives this audio signal, enter
Row analog digital conversion, decode, solve frame operation.
As shown in figure 11, for DRM method for using license another kind of in the system of DRM protection shown in Fig. 8
Flow chart, its flow process includes:
S24, DRM protection device is connected by usb interface module 8 with communication terminal；
S26, communication terminal produce certification solicited message, are sent to shown DRM by usb interface module 8
The security authentication module 1 of protection device.
S28, security authentication module 1 use DRM license file to be authenticated certification solicited message；Its
In, described transferred DRM license file can be saved in the storage element of security authentication module 1,
Internal memory can also be stored in expand in storing module 2；
S30,1 authentication result of security authentication module are sent in communication terminal by usb interface module 8；
S32, communication terminal use digital media file according to authentication result.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to recognize
Determine the present invention be embodied as be confined to these explanations.Ordinary skill for the technical field of the invention
For personnel, without departing from the inventive concept of the premise, it is also possible to make some simple deduction or replace,
All should be considered as belonging to protection scope of the present invention.
Claims (15)
1. a DRM protection device, is used for protecting digital rights information, including safety certification mould
Block, signal processing module and usb interface module；Described DRM protection device passes through signal processing
Module and/or usb interface module are connected with communication terminal；
Described signal processing module, is connected to security authentication module, passes through for DRM protection device
When signal processing module is connected with communication terminal, receive the audio signal that communication terminal sends, and sound
Frequently signal is converted into digital signal and exports described security authentication module, and from security authentication module
The digital signal received is converted to audio signal and exports communication terminal；Described signal processing module includes
Audio interface microphone pole and the control module in earth polar, audio signal reception unit, the first audio signal turn
Die change block, the second audio signal modular converter and audio signal transmitting element, described audio signal reception
Unit docks with the sound channel pole of audio interface, wherein,
The control module in described audio interface microphone pole and earth polar is for the Mike pole to described audio interface
It is identified with earth polar, described audio signal transmitting element is docked, by ground with the Mike pole identified
Current potential docks with the earth polar identified；
Described audio signal reception unit is for receiving from described by the sound channel pole of described audio interface
The audio signal of communication terminal；
Described first audio signal modular converter is for changing the audio signal from described communication terminal
For digital signal；
Described second audio signal modular converter will be for treating the digital signal sent to described communication terminal
Be converted to audio signal；
Described audio signal transmitting element will be for treating to described logical by the Mike pole of described audio interface
The audio signal that the digital signal that letter terminal sends is converted into sends to described communication terminal；
Described usb interface module, attachment security authentication module, passes through for DRM protection device
When usb interface module is connected with communication terminal, receives the digital signal of communication terminal transmission and be forwarded to
Described security authentication module, and receive the digital signal of described security authentication module transmission and be forwarded to
Described communication terminal；
Described security authentication module, is used for receiving certification solicited message and using DRM licence to carry out
Certification.
2. DRM protection device as claimed in claim 1, it is characterised in that described second sound
Frequently signal conversion module is current mode D/A converter module, described current mode D/A converter module by from
The audio signal that the mode of the Mike pole extraction electric current of described audio interface will convert into is to described communication eventually
End sends.
3. DRM protection device as claimed in claim 1, it is characterised in that described audio frequency connects
The control module in mouth Mike pole and earth polar includes:
Acquisition module, is used for obtaining described communication terminal after opening recording channel, in its audio interface
The signal of telecommunication of each pole in a pair audio frequency input extremely；
Identification module, for according to wheat described in the signal of telecommunication identification of each pole in the input extremely of the pair of audio frequency
Gram pole and earth polar；
Port handover module, after described identification module identifies Mike pole and earth polar, by described
Audio signal transmitting element docks with described Mike pole, is docked with described earth polar by earth potential.
4. DRM protection device as claimed in claim 3, it is characterised in that described acquisition mould
Block is voltage domain modular converter, for setting up current channel between the pair of audio frequency input pole, and will
Ground reference accesses in the node of described current channel, obtains each pole in the input extremely of the pair of audio frequency
Voltage relative value relative to described ground reference.
5. DRM protection device as claimed in claim 3, it is characterised in that described identification mould
Block includes:
First identifies submodule, for the voltage relative value of each pole in the input extremely of the pair of audio frequency being divided
Do not compare with ground reference, export a digital signal level respectively according to respective comparative result；
Logic judgment module, for identifying two digital signal levels of submodule output according to described first
Identify described Mike pole and described earth polar.
6. the DRM protection device as described in any one of claim 1-5, it is characterised in that institute
State DRM protection device when being connected by signal processing module and usb interface module with communication terminal,
Prioritizing selection transmits digital signal by usb interface module.
7. the DRM protection device as described in any one of claim 1-5, it is characterised in that institute
State security authentication module to be additionally operable to DRM license information is modified.
8. the DRM protection device as described in any one of claim 1-5, it is characterised in that institute
State DRM protection device and also include that memory expansion module, described memory expansion module are used for storing DRM
License file.
9. a DRM method for using license, including:
Communication terminal and DRM protection device are connected by signal processing module and/or usb interface module
Connecing, described DRM protection device includes signal processing module and usb interface module；
Communication terminal sends the certification solicited message security authentication module to DRM protection device；Wherein,
Described certification solicited message by signal processing module with audio signal and/or usb interface module with number
Word signal sends；
Described security authentication module uses DRM license file to enter with the certification solicited message received
Row certification；
Described security authentication module is sent to institute authentication result by digital signal and/or audio signal
State communication terminal；
Described communication terminal uses digital media information according to described authentication result；
Include when communication terminal and described DRM protection device are connected by signal processing module:
Mike pole and earth polar in audio interface are identified, by audio signal transmitting element with identify
Mike pole docking, earth potential is docked with the earth polar identified, by audio signal reception unit and sound
Frequently the sound channel pole docking of interface；
Communication terminal sends certification solicited message and includes to DRM protection device: message processing module connects
Receive audio signal that described communication terminal sends and be converted to digital signal and export described safety certification mould
Block；
Authentication result is sent to communication terminal and includes: will treat the digital signal sent to described communication terminal
Be converted to audio signal by signal processing module and be sent to communication terminal.
10. DRM method for using license as claimed in claim 9, it is characterised in that will treat
The digital signal sent to described communication terminal by signal processing module be converted to audio signal by from
The mode of the Mike pole extraction electric current of described audio interface will treat the numeral letter sent to described communication terminal
Number be converted to audio signal.
11. DRM method for using licenses as claimed in claim 9, it is characterised in that to sound
Frequently in interface, Mike pole and earth polar are identified, by audio signal transmitting element and the Mike pole identified
Docking, includes the method that earth potential docks with the earth polar identified:
Obtain described communication terminal opening behind recording channel, a pair audio frequency input pole in its audio interface
In the signal of telecommunication of each pole；
According to Mike pole and earth polar described in the signal of telecommunication identification of each pole in the input extremely of the pair of audio frequency.
12. DRM method for using licenses as claimed in claim 11, it is characterised in that obtain
The method of the signal of telecommunication of each pole in the input extremely of the pair of audio frequency that takes is: input pole at the pair of audio frequency
Between set up current channel, ground reference is accessed in the node of described current channel, obtains described
In a pair audio frequency input extremely, each pole is relative to the voltage relative value of described ground reference.
13. DRM method for using licenses as claimed in claim 11, it is characterised in that root
According to the signal of telecommunication identification Mike pole of each pole and the method in earth polar in the input extremely of the pair of audio frequency it is:
The voltage relative value of each pole in the input extremely of the pair of audio frequency is compared with ground reference respectively
Relatively, a digital signal level is respectively obtained according to respective comparative result；
According to Mike pole and described earth polar described in the two digital signal level identifications obtained.
The 14. DRM method for using licenses as described in any one of claim 9-13, its feature
It is, also includes downloading digital media file and DRM license file, wherein, described numeral matchmaker
Body file preserves on communication terminals, and described DRM licence exports DRM by ciphertext form and protects
Protection unit stores.
The 15. DRM method for using licenses as described in any one of claim 9-13, its feature
Being, after authentication result is sent to described signal processing module, security authentication module is to storage
DRM file modify.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210126609.4A CN103377322B (en) | 2012-04-26 | 2012-04-26 | DRM protection device and DRM method for using license |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210126609.4A CN103377322B (en) | 2012-04-26 | 2012-04-26 | DRM protection device and DRM method for using license |
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| CN103377322A CN103377322A (en) | 2013-10-30 |
| CN103377322B true CN103377322B (en) | 2016-12-14 |
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| CN201210126609.4A Active CN103377322B (en) | 2012-04-26 | 2012-04-26 | DRM protection device and DRM method for using license |
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| CN111723344B (en) * | 2020-05-26 | 2024-03-19 | 深圳数字电视国家工程实验室股份有限公司 | Digital content protection method, device, electronic equipment and storage medium |
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|---|---|---|---|---|
| CN1746808A (en) * | 2004-09-07 | 2006-03-15 | 微软公司 | Securing audio-based access to application data |
| CN102142067A (en) * | 2011-03-09 | 2011-08-03 | 中山大学 | Digital family network-based digital rights management system |
| CN202004846U (en) * | 2011-04-02 | 2011-10-05 | 信雅达系统工程股份有限公司 | Cellphone shield capable of protecting mobile payment security |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3951464B2 (en) * | 1998-07-28 | 2007-08-01 | 株式会社日立製作所 | Digital signal processor |
| CN101526985A (en) * | 2008-03-04 | 2009-09-09 | 索尼（中国）有限公司 | Client system and method of digital rights management and digital rights management system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1746808A (en) * | 2004-09-07 | 2006-03-15 | 微软公司 | Securing audio-based access to application data |
| CN102142067A (en) * | 2011-03-09 | 2011-08-03 | 中山大学 | Digital family network-based digital rights management system |
| CN202004846U (en) * | 2011-04-02 | 2011-10-05 | 信雅达系统工程股份有限公司 | Cellphone shield capable of protecting mobile payment security |
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