CN103377323A - Digital rights management (DRM) protecting device and DRM license using method - Google Patents
Digital rights management (DRM) protecting device and DRM license using method Download PDFInfo
- Publication number
- CN103377323A CN103377323A CN2012101268422A CN201210126842A CN103377323A CN 103377323 A CN103377323 A CN 103377323A CN 2012101268422 A CN2012101268422 A CN 2012101268422A CN 201210126842 A CN201210126842 A CN 201210126842A CN 103377323 A CN103377323 A CN 103377323A
- Authority
- CN
- China
- Prior art keywords
- utmost point
- audio frequency
- drm
- module
- mike
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a digital rights management (DRM) protecting device and system and a DRM license using method. The DRM protecting device is connected with a mobile terminal through an audio frequency device, audio frequency signals are converted into digital signals through a signal processing module to be output to the DRM protecting device, the digital signals are converted into the audio frequency signals to be output to the mobile terminal, and information interaction between the DRM protecting device and the mobile terminal through the audio frequency signals is achieved. Through the technical scheme, the problem that in the prior art, a DRM license can only be used by means of a computer or by universal serial bus (USB) interface connection and the mobile terminal without a USB interface cannot pass DRM license verification to use digital media files is solved; a microphone pole of an audio frequency interface and an earth pole are further identified simultaneously prior to signal processing, and the problem that the microphone pole of the audio frequency interface and the earth pole are not fixed so that data communication cannot be performed is solved.
Description
Technical field
The present invention relates to the digital copyright management field, relate in particular to DRM protective device and DRM license file using method.
Background technology
DRM (Digital Rights Management, digital copyright management) is based on the comprehensive solution of information security technology, can effectively stop illegally the using and copying of digital media file, and reaches the purpose of the digital intellecture property of protection.Along with the arrival of digital times, it is more and more important that DRM becomes, and DRM has become basis and the assurance of the development of digitized content.
The DRM licence is generally all stored on computers, and uses with the computing machine binding, and the user can only use the DRM licence at the computing machine of storage DRM licence, can't use on other computing machines; Also handlebar DRM licence stores mobile memory into, then is connected with computing machine by USB and uses the DRM license validation to use digital media file.
Along with mobile terminal device such as mobile phone, panel computer etc. develop rapidly, digital media file also is rapidly developed in the use of portable terminal, but, because a lot of mobile terminal device is not provided with USB interface, cause the DRM licence in portable terminal, to use.
Summary of the invention
The using method of DRM protective device provided by the invention and DRM licence can solve that portable terminal in the prior art does not arrange USB interface and the problem that can't use the DRM licence.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of DRM protective device, audio interface and audio frequency apparatus by audio frequency apparatus carry out data interaction, comprise security authentication module and signal processing module; Wherein, described signal processing module, be connected to security authentication module, be used for received audio signal and convert digital signal to outputing to described security authentication module, and a digital signal that receives from security authentication module is converted to sound signal outputs to audio frequency apparatus; Described security authentication module is used for storage DRM licence, and receives authentication request information and use the DRM licence that the authentication request information that receives is authenticated, and authentication result is sent to described signal processing module.
In an embodiment of the present invention, this signal processing module comprises control module, sound signal receiver module, the first sound signal modular converter, the second sound signal modular converter and the sound signal sending module in the audio interface Mike utmost point and earth polar, described sound signal receiver module docks with the sound channel utmost point of audio interface, wherein, the control module in described audio interface Mike's utmost point and earth polar is used for Mike's utmost point and the earth polar of described audio interface are identified, described sound signal sending module is docked with the Mike's utmost point that identifies, earth potential is docked with the earth polar of identifying; Described sound signal receiver module is used for sound channel utmost point reception by described audio interface from the sound signal of described audio frequency apparatus; Described the first sound signal modular converter is used for and will be converted to digital signal from the sound signal of described audio frequency apparatus; Described the second sound signal modular converter is used for treating that the digital signal to described audio frequency apparatus sends is converted to sound signal; Described sound signal sending module is used for will treating to send to described audio frequency apparatus to the sound signal that the digital signal that described audio frequency apparatus sends converts to by Mike's utmost point of described audio interface.
In an embodiment of the present invention, this second sound signal modular converter is the current mode D/A converter module.
In an embodiment of the present invention, this current mode D/A converter module sends the sound signal that converts to by the mode that the Mike's utmost point from described audio interface extracts electric current to described audio frequency apparatus.
In an embodiment of the present invention, the control module in this audio interface Mike's utmost point and earth polar comprises: acquisition module is used for obtaining described audio frequency apparatus after opening the recording channel, the electric signal of each utmost point in a pair of audio frequency input extremely in its audio interface; Identification module, be used for according to described a pair of audio frequency input extremely the electric signal of each utmost point identify described Mike's utmost point and earth polar; The port handover module is used for described identification module and identifies after Mike's utmost point and the earth polar, and described sound signal transmitting element is docked with described Mike's utmost point, and earth potential is docked with described earth polar.
In an embodiment of the present invention, this acquisition module is the voltage domain modular converter, be used between the described a pair of audio frequency input utmost point, setting up current channel, access with reference to earth potential in the node of described current channel, obtain in the described a pair of audio frequency input extremely each utmost point with respect to the voltage relative value of described ground reference.
In an embodiment of the present invention, this identification module comprises the first recognin module, for detection of the positive negative characteristic of the voltage relative value of each utmost point in the described a pair of audio frequency input extremely, identifies described Mike's utmost point and described earth polar according to testing result.This identification module also comprises the second recognin module, and the voltage relative value of each utmost point compares with described ground reference respectively to be used for inputting described a pair of audio frequency extremely, exports respectively a digital signal level according to comparative result separately; Logic judgment module is used for identifying described Mike's utmost point and described earth polar according to two digital signal levels of described the second recognin module output.
In an embodiment of the present invention, this security authentication module can also be used for the DRM license information is made amendment.
In an embodiment of the present invention, this DRM protective device also comprises memory expansion module, is used for storage DRM licence.
A kind of DRM protection system comprises aforesaid DRM protective device and audio frequency apparatus, and described audio frequency apparatus is connected with described DRM protective device by audio interface, is used for preserving digital media file and uses digital media file according to the DRM authentication result; Described DRM protective device is for preserving the DRM licence and authentication request being authenticated.
A kind of DRM method for using license comprises: the DRM protective device is connected with audio frequency apparatus, and wherein said DRM protective device comprises security authentication module and signal processing module; Audio frequency apparatus sends authentication request information to described signal processing module by sound signal; Described signal processing module is converted to digital signal to the sound signal that receives, and sends to described security authentication module; Described security authentication module uses DRM licence and the authentication request information that receives to authenticate, and authentication result is sent to described signal processing module; Described message processing module is converted to audio-frequency information to the authentication result that receives and outputs to described audio frequency apparatus; Described audio frequency apparatus uses digital media information according to described authentication result.
In an embodiment of the present invention, the DRM protective device is connected with audio frequency apparatus and comprises: Mike's utmost point and earth polar in the audio interface are identified, the sound signal transmitting element is docked with the Mike's utmost point that identifies, earth potential is docked with the earth polar of identifying, the sound signal receiving element is docked with the sound channel utmost point of audio interface;
In an embodiment of the present invention, adopt the current mode D/A converter module will treat to be converted to sound signal to the digital signal that described audio frequency apparatus sends.
In an embodiment of the present invention, described current mode D/A converter module sends the sound signal that converts to by the mode that the Mike's utmost point from described audio interface extracts electric current to described audio frequency apparatus.
In an embodiment of the present invention, Mike's utmost point and earth polar in the audio interface are identified, the sound signal transmitting element is docked with the Mike's utmost point that identifies, the method that earth potential is docked with the earth polar of identifying comprises: obtain described audio frequency apparatus after opening the recording channel, the electric signal of each utmost point in a pair of audio frequency input extremely in its audio interface; Electric signal according to each utmost point in the described a pair of audio frequency input is extremely identified described Mike's utmost point and earth polar; Described sound signal transmitting element is docked with described Mike's utmost point, earth potential is docked with described earth polar.
In an embodiment of the present invention, the method of obtaining the electric signal of each utmost point in the described a pair of audio frequency input extremely is: set up current channel between the described a pair of audio frequency input utmost point, access with reference to earth potential in the node of described current channel, obtain in the described a pair of audio frequency input extremely each utmost point with respect to the voltage relative value of described ground reference.
In an embodiment of the present invention, according to electric signal identification Mike's utmost point of each utmost point and the method in earth polar in the described a pair of audio frequency input extremely be: the voltage relative value of each utmost point compares with described ground reference respectively in will described a pair of audio frequency inputting extremely, obtains respectively a digital signal level according to separately comparative result; Identify described Mike's utmost point and described earth polar according to two digital signal levels that obtain.
In an embodiment of the present invention, also comprise downloads digital media file and DRM license file, described digital media file is kept on the audio frequency apparatus, and described DRM licence is stored in the DRM protective device by the ciphertext formal output.
In an embodiment of the present invention, authentication result is sent to after the described signal processing module, the DRM file of storage is made amendment.
Beneficial effect of the present invention is that the DRM protective device connects mobile device by audio frequency apparatus, and the DRM licence can not bound computing machine and use, and can solve mobile device does not have USB interface and can not use the DRM licence, has effectively protected digital rights information.Simultaneously, utilizing before audio interface carries out data communication, first Mike's utmost point and earth polar in the audio interface are identified, so that the present invention can better compatible existing different audio interface.
Description of drawings
The synoptic diagram of the DRM protective device that Fig. 1 provides for the technical program embodiment;
Fig. 2 is the synoptic diagram of signal processing module in the DRM protective device shown in Figure 1;
Fig. 3 is the synoptic diagram of the control module in signal processing module sound intermediate frequency interface Mike's utmost point shown in Figure 2 and earth polar;
Fig. 4 is another synoptic diagram of the control module in signal processing module sound intermediate frequency interface Mike's utmost point shown in Figure 2 and earth polar;
Fig. 5 is another synoptic diagram of the control module in signal processing module sound intermediate frequency interface Mike's utmost point shown in Figure 2 and earth polar;
Fig. 6 is the synoptic diagram of the first sound signal modular converter in the signal processing module shown in Figure 2;
Fig. 7 is the synoptic diagram of the second sound signal modular converter in the signal processing module shown in Figure 2;
The synoptic diagram of the DRM protection system that Fig. 8 provides for the technical program embodiment;
Fig. 9 is the process flow diagram of DRM protection system DRM method for using license shown in Figure 8;
Figure 10 is the process flow diagram of the signal processing method of signal processing module shown in Figure 8.
Embodiment
Main design of the present invention is, the DRM protective device is communicated by letter by audio interface with audio frequency apparatus, is implemented in portable terminal and do not have in the situation of USB interface to use equally the DRM licence to use digital media information; Utilize audio interface to carry out before the data communication, first Mike's utmost point and earth polar in the audio interface are identified, again the sound signal transmitting element in the external unit is docked with the Mike's utmost point that identifies, the earth potential of external unit is docked with the earth polar of identifying, after the correct docking, externally carry out data communication between equipment and the audio frequency apparatus in conjunction with digital-to-analogue/analog to digital conversion, payment devices can generally be used at different audio frequency apparatuses.
The synoptic diagram of the DRM protective device that provides for the technical program embodiment as shown in Figure 1; This DRM protective device comprises security authentication module 1 and signal processing module 3; Described signal processing module 3, be connected to security authentication module 1, be used for that a sound signal that receives is converted to digital signal and output to described security authentication module 1, and a digital signal that receives from security authentication module 1 is converted to sound signal outputs to audio frequency apparatus; Described security authentication module 1 is used for receiving authentication request information and using the DRM licence to authenticate, and authentication result is sent to described signal processing module 3.Described DRM protective device can use power module 4 to power; Wherein, described audio frequency apparatus can comprise the mobile terminal devices such as mobile phone, notebook, panel computer.When using the DRM protective device to authenticate, the authentication request information that signal processing module 3 audio reception equipment send, described authentication request information exchange is crossed audio signal transmission, and described signal processing module 3 is converted to the authentication request information of digital signal to the sound signal (authentication request information) that receives and outputs in the described security authentication module 1; Described security authentication module 1 uses the DRM license file of storage that authentication request information is authenticated, and authentication result is outputed in the described signal processing module 3; Described signal processing module 3 is converted to sound signal with authentication result, then sends in the described audio frequency apparatus for audio frequency apparatus according to the authentication result digital media file by audio interface.Digital media file can be on different audio frequency apparatuses copying and saving, can use same DRM licence to authenticate the use digital media file.
Like this; the use of DRM licence can not rely on computer; can realize authentication at the terminal device that is convenient for carrying; can not connect by USB interface and realize authentication; especially there is not to realize on the terminal device of USB interface the DRM authentication; and the digital media file on the distinct device can be verified with same DRM protected file.
In another embodiment, described security authentication module 1 can also be according to the DRM license information of DRM license management protocol modification storage, comprise according to Digital Media and limit the time of using, perhaps allow number of times of opening etc., delete that according to the rules deletion waited operation automatically after the DRM licence loses efficacy.
In another embodiment, described DRM protective device can also comprise internal memory expanding element 2, and described memory expansion module is used for storage DRM license file; Like this, described DRM protective device can be preserved the larger DRM license file of file, can also preserve simultaneously a plurality of DRM license files.Improve the DRM protective device and adapt to the demand that different digital media files authenticates.
As shown in Figure 2, be the synoptic diagram of signal processing module in the DRM protective device shown in Figure 1; This signal processing module comprises control module 31, sound signal receiving element 32, the first sound signal modular converter 33, the second sound signal modular converter 34 and the sound signal transmitting element 35 in the audio interface Mike utmost point and earth polar.The control module 31 in audio interface Mike's utmost point and earth polar is used for Mike's utmost point and the earth polar of audio interface are identified, after the identification, the earth potential of signal processing module equipment of itself is docked with the earth polar of identifying, to unify the ground reference of signal processing module and audio frequency apparatus, sound signal transmitting element 35 is docked with the Mike's utmost point that identifies, send the sendaisle of data to set up signal processing module to audio frequency apparatus.Because the position of the sound channel utmost point (comprising left/right/MOMO sound channel) is normally fixed in the audio interface, therefore, sound signal receiving element in the external unit and the sound channel utmost point of audio interface are after audio frequency apparatus is opened the recording channel, can automatically finish docking, set up signal processing module from the receiving cable of audio frequency apparatus receive data.Sound signal receiving element 32 is used for passing through the sound channel utmost point reception of audio interface from the sound signal of audio frequency apparatus, with audio signal transmission to the first sound signal modular converter 33 that receives, the first sound signal modular converter 33 is used for and will be converted to digital signal from this sound signal of audio frequency apparatus, the second sound signal modular converter 34 is used for treating that the digital signal to audio frequency apparatus sends is converted to sound signal, and sound signal sends single 35 and is used for will sending to audio frequency apparatus via the sound signal that the second sound signal modular converter 34 converts to by Mike's utmost point of audio interface.
As shown in Figure 3, be a kind of implementation of the control module 1 in signal processing module sound intermediate frequency interface Mike's utmost point shown in Figure 2 and earth polar.Comprise 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, the electric signal of each utmost point in a pair of audio frequency input extremely in its audio interface, identification module 132 is for electric signal identification Mike's utmost point and the earth polar at the two poles of the earth that get access to according to acquisition module 131, port handover module 133, being used for identification module 132 identifies after Mike's utmost point and the earth polar, automatically the earth potential with the signal processing module equipment of itself docks with the earth polar of identifying, to unify the ground reference of signal processing module and audio frequency apparatus, automatically with sound signal transmitting element 35 and the Mike's utmost point that identifies.
As shown in Figure 4, be the another kind of implementation of the control module 1 in signal processing module sound intermediate frequency interface Mike's utmost point shown in Figure 2 and earth polar.Comprise voltage domain modular converter 141 and the first recognin module 142.After voltage domain modular converter 141 is opened the recording channel by existing audio frequency apparatus, Mike has this precondition of voltage that is higher than the earth polar, set up current channel between a pair of audio frequency input of in its audio interface this utmost point, access with reference to earth potential in the node of this current channel, obtain in this a pair of audio frequency input extremely each utmost point with respect to the voltage relative value of this ground reference, wherein ground reference refers to external unit, the common earth potential of control module, because after audio frequency apparatus is opened the recording channel, Mike has the voltage that is higher than the earth polar, therefore, on this current channel that voltage domain modular converter 141 is set up, electric current must be to flow to the earth polar from Mike's utmost point, ground reference is 0, so Mike's utmost point with respect to the voltage relative value one of this ground reference be decided to be on the occasion of, the earth polar is decided to be negative value with respect to the voltage relative value one of this ground reference, and therefore, what voltage domain modular converter 141 was exported is a positive voltage relative value and a negative voltage relative value.The first recognin module 142 identifies Mike's utmost point and earth polar by the positive negative characteristic that detects the voltage relative value, positive one Mike's utmost point very, negative one earth polar very.
As shown in Figure 5, be the another kind of implementation of the control module 1 in signal processing module sound intermediate frequency interface Mike's utmost point shown in Figure 2 and earth polar.This embodiment is different from place embodiment illustrated in fig. 4 and is, adopt the second recognin module 141 and logic judgment module 152 to substitute the first recognin module 152 embodiment illustrated in fig. 4, namely the control module 1 in this embodiment sound intermediate frequency interface Mike's utmost point and earth polar comprises voltage domain modular converter 141, the second recognin module 151 and logic judgment module 152.After voltage domain modular converter 141 is still opened the recording channel by existing audio frequency apparatus, Mike has this precondition of voltage that is higher than the earth polar, set up current channel between a pair of audio frequency input of in its audio interface this utmost point, access with reference to earth potential in the node of this current channel, obtain in this a pair of audio frequency input extremely each utmost point with respect to the voltage relative value of this ground reference.The second recognin module 151 comprises two comparison modules, the first comparison module 151a and the second comparison module 151b, the first comparison module 151a is used for a voltage relative value and the ground reference of 141 outputs of voltage domain modular converter are compared, and exports a digital signal level according to comparative result; The second comparison module 151b is used for another voltage relative value and the ground reference of 141 outputs of voltage domain modular converter are compared, and exports another digital signal level according to comparative result.Logic judgment module 152 is used for digital signal level identification Mike's utmost point and the earth polar according to the first comparison module 151a and the second comparison module 151b output.The comparison rule of supposing the first comparison module 151a and the second comparison module 151b is, when voltage relative value during greater than ground reference, output level 1, when voltage relative value during less than ground reference, output level 0 is (in the practical application, also can be on the contrary), so when the first comparison module 151a and the second comparison module 151b output all be level 0 time, show that audio frequency apparatus also do not open the plug of recording channel or external unit and also be not inserted in the audio interface, when any one output be level 1 time, show that audio frequency apparatus opened the recording channel, logic judgment module 152 is identified as Mike's utmost point with level 1 a corresponding utmost point, and level 0 a corresponding utmost point is identified as the earth polar.
As shown in Figure 6, be a kind of embodiment of the first sound signal modular converter 33 in the signal processing module shown in Figure 2.Comprise DC converting module 331 and comparison module 332.This embodiment is applicable to a sound channel the transmission of data, also is applicable to simultaneously the transmission of datas of two sound channels, and when using two sound channels simultaneously during the transmission of data, the data volume of its same time period transmission is to use the twice of a sound channel transmission.Corresponding to the sound channel number in the audio interface, set the sub-comparison module of corresponding number in the comparison module 332, present embodiment is set the sub-comparison module 332a of corresponding L channel and the sub-comparison module 332b of corresponding R channel.Owing to the ac voltage signal that is generally of exporting from the sound channel utmost point of audio interface, therefore, DC converting module 331 is used for the sound signal conversion direct current signal of sound signal receiving element 32 from the alternating voltage form of the sound channel utmost point reception of audio interface.Preferably, DC converting module 331 is with the input signal centered level is carried out clamped function, make the original AC signal of left and right acoustic channels, become the signal that certain DC component is arranged, concrete mode can be: on the ac voltage signal of sound channel utmost point output, the positive DC voltage VDC_A that superposes, preferred VDC_A are half of supply voltage VDD, and the two sound channel utmost points of audio interface are connected a resistance to ground, connect resistance resistance preferably 32 Ω or 16 Ω.The sub-comparison module 332b of sub-comparison module 332a and corresponding R channel compares for the direct current signal that DC converting module 331 is converted to and the DC voltage VDC_A of above-mentioned stack, send comparative result, if the direct current signal that DC converting module 31 converts to is greater than VDC_A, then export high level, otherwise output low level.
As shown in Figure 7, be a kind of embodiment of the second sound signal modular converter 34 in the signal processing module shown in Figure 2.The second sound signal modular converter 34 adopts fills with current mode DAC; it is according to the digital signal for the treatment of to send to audio frequency apparatus; extract the electric current that changes from Mike's utmost point of audio interface; because Mike extremely goes up usually and can connect a resistance in the existing audio interface; when the electric current that extracts changed, the voltage that Mike extremely goes up was along with variation, the voltage of extremely going up by changing Mike; realize digital signal to the conversion of sound signal, realized that simultaneously sound signal is from Mike's utmost point input audio frequency apparatus.
The synoptic diagram of the DRM protection system that provides for the technical program embodiment as described in Figure 8; Described DRM protection system comprises above-described wherein a kind of DRM protective device and audio frequency apparatus, described audio frequency apparatus is connected with described DRM protective device by audio interface, is used for preserving digital media file and uses digital media file according to the DRM authentication result; Described DRM protective device is for preserving the DRM licence and authentication request being authenticated.
As shown in Figure 9, be DRM method for using license process flow diagram in the DRM protection system shown in Figure 8, its flow process comprises:
S00, connect DRM protective device and audio frequency apparatus by signal processing module;
S02, audio frequency apparatus send authentication request information, by self software authentication request information are converted to the signal processing module that sound signal outputs to described DRM protective device;
S04, signal processing module 3 receive described authentication request information, described authentication request information is converted to digital signal, and outputs in the described security authentication module 1;
S06, security authentication module 1 use the DRM license file that stores, and the authentication request information that receives is authenticated; Wherein, described DRM license file can be to be kept in the storage element of security authentication module 1, also can be stored in the memory expansion module 2;
S08, security authentication module 1 send to authentication result in the described signal processing module 3;
S10, signal processing module 3 are converted to sound signal to authentication result and send in the audio frequency apparatus;
S12, audio frequency apparatus use digital media file according to authentication result.
As shown in figure 10, be the process flow diagram of the signal processing method of signal processing module shown in Figure 8; Concrete steps comprise:
Mike's utmost point and the earth polar of 1 pair of audio interface of control module in S000, audio interface Mike's utmost point and earth polar are identified, after the identification, the earth potential of signal processing module equipment of itself is docked with the earth polar of identifying, to unify the ground reference of signal processing module and audio frequency apparatus, sound signal transmitting element 5 is docked with the Mike's utmost point that identifies, to set up the passage that sends data to audio frequency apparatus.
On receiving cable:
S001, sound signal receiving element 2 pass through the sound channel utmost point reception of audio interface from the sound signal of audio frequency apparatus, with audio signal transmission to the first sound signal modular converter 3 that receives.Should obtain after via audio frequency apparatus framing, coding and digital-to-analog conversion from the sound signal of audio frequency apparatus.
S002, the first sound signal modular converter 3 will be converted to digital signal from this sound signal of audio frequency apparatus, export the digital signal after the conversion to decoder module 7.Before transferring to decoder module 7, preferred, by filtering the burr module to the digital signal after changing.
S003,7 pairs of digital signals that convert to from the sound signal of audio frequency apparatus of decoder module are decoded, with decoded digital data transmission to separating frame module 9.
S004, separate 9 pairs of decoder modules of frame module, 7 decoded digital signals and separate frame, carry out buffer memory with separating the data that obtain behind the frame, or be sent to other processing modules and carry out business processing.
On sendaisle:
The digital signal for the treatment of to the audio frequency apparatus transmission is taken out or obtained to S011, framing module 8 from other processing modules from buffer memory, this is treated to carry out framing to the digital signal that audio frequency apparatus sends, and the digital signal behind the framing is inputed to coding module 6.
Treating to the encoding digital signals of audio frequency apparatus transmission of the process framing of S012,8 outputs of 6 pairs of framing modules of coding module inputs to the second sound signal modular converter 4 with the digital signal after encoding.
S013, the second sound signal modular converter 4 will through coding treat be converted to sound signal to the digital signal that audio frequency apparatus sends, transfer to sound signal transmitting element 5.
S014, sound signal transmitting element 5 will send to audio frequency apparatus via the sound signal that the second sound signal modular converter 4 converts to by Mike's utmost point of audio interface.After audio frequency apparatus is received this sound signal, carry out analog to digital conversion, decoding, the operation of solution frame.
Above content is the further description of the present invention being done in conjunction with concrete embodiment, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (18)
1. DRM protective device, audio interface and audio frequency apparatus by audio frequency apparatus carry out data interaction, comprise security authentication module and signal processing module; Wherein,
Described signal processing module is connected to security authentication module, is used for received audio signal and converts digital signal to outputing to described security authentication module, and a digital signal that receives from security authentication module is converted to sound signal outputs to audio frequency apparatus;
Described security authentication module is used for storage DRM licence, and receives authentication request information and use the DRM licence that the authentication request information that receives is authenticated, and authentication result is sent to described signal processing module.
2. DRM protective device as claimed in claim 1; it is characterized in that; described signal processing module comprises: the control module in audio interface Mike's utmost point and earth polar, sound signal receiving element, the first sound signal modular converter, the second sound signal modular converter and sound signal transmitting element; described sound signal receiving element docks with the sound channel utmost point of audio interface; wherein
The control module in described audio interface Mike's utmost point and earth polar is used for Mike's utmost point and the earth polar of described audio interface are identified, and described sound signal transmitting element is docked with the Mike's utmost point that identifies, and earth potential is docked with the earth polar of identifying;
Described sound signal receiving element is used for sound channel utmost point reception by described audio interface from the sound signal of described audio frequency apparatus;
Described the first sound signal modular converter is used for and will be converted to digital signal from the sound signal of described audio frequency apparatus;
Described the second sound signal modular converter is used for treating that the digital signal to described audio frequency apparatus sends is converted to sound signal;
Described sound signal transmitting element is used for will treating to send to described audio frequency apparatus to the sound signal that the digital signal that described audio frequency apparatus sends converts to by Mike's utmost point of described audio interface.
3. DRM protective device as claimed in claim 2 is characterized in that, described the second sound signal modular converter is the current mode D/A converter module.
4. payment devices as claimed in claim 3 is characterized in that, described current mode D/A converter module sends the sound signal that converts to by the mode that the Mike's utmost point from described audio interface extracts electric current to described audio frequency apparatus.
5. DRM protective device as claimed in claim 2 is characterized in that, the control module in described audio interface Mike's utmost point and earth polar comprises:
Acquisition module is used for obtaining described audio frequency apparatus after opening the recording channel, the electric signal of each utmost point in a pair of audio frequency input extremely in its audio interface;
Identification module, be used for according to described a pair of audio frequency input extremely the electric signal of each utmost point identify described Mike's utmost point and earth polar;
The port handover module is used for described identification module and identifies after Mike's utmost point and the earth polar, and described sound signal transmitting element is docked with described Mike's utmost point, and earth potential is docked with described earth polar.
6. DRM protective device as claimed in claim 5; it is characterized in that; described acquisition module is the voltage domain modular converter; be used between the described a pair of audio frequency input utmost point, setting up current channel; access with reference to earth potential in the node of described current channel, obtain in the described a pair of audio frequency input extremely each utmost point with respect to the voltage relative value of described ground reference.
7. DRM protective device as claimed in claim 5 is characterized in that, described identification module comprises:
The first recognin module, the voltage relative value of each utmost point compares with described ground reference respectively to be used for inputting described a pair of audio frequency extremely, exports respectively a digital signal level according to comparative result separately;
Logic judgment module is used for identifying described Mike's utmost point and described earth polar according to two digital signal levels of described the first recognin module output.
8. such as each described DRM protective device of claim 1-7, it is characterized in that described security authentication module also is used for the DRM license information is made amendment.
9. such as each described DRM protective device of claim 1-7, it is characterized in that described DRM protective device also comprises memory expansion module, described memory expansion module is used for storage DRM licence.
10. DRM method for using license comprises:
The DRM protective device is connected with audio frequency apparatus, and wherein said DRM protective device comprises security authentication module and signal processing module;
Audio frequency apparatus sends authentication request information to described signal processing module by sound signal;
Described signal processing module is converted to digital signal to the sound signal that receives, and sends to described security authentication module;
Described security authentication module uses DRM licence and the authentication request information that receives to authenticate, and authentication result is sent to described signal processing module;
Described message processing module is converted to audio-frequency information to the authentication result that receives and outputs to described audio frequency apparatus;
Described audio frequency apparatus uses digital media information according to described authentication result.
11. DRM method for using license as claimed in claim 10 is characterized in that,
Described DRM protective device is connected with audio frequency apparatus and comprises: Mike's utmost point and earth polar in the audio interface are identified; the sound signal transmitting element is docked with the Mike's utmost point that identifies; earth potential is docked with the earth polar of identifying, the sound signal receiving element is docked with the sound channel utmost point of audio interface.
12. DRM method for using license as claimed in claim 10, it is characterized in that described message processing module is converted to audio-frequency information to the enciphered message that receives and outputs to described audio frequency apparatus for adopting the current mode D/A converter module will treat to be converted to sound signal to the digital signal that described audio frequency apparatus sends.
13. method of payment as claimed in claim 12 is characterized in that, described current mode D/A converter module sends the sound signal that converts to by the mode that the Mike's utmost point from described audio interface extracts electric current to described audio frequency apparatus.
14. DRM method for using license as claimed in claim 11, it is characterized in that, Mike's utmost point and earth polar in the audio interface are identified, the sound signal transmitting element is docked with the Mike's utmost point that identifies, the method that earth potential is docked with the earth polar of identifying comprises:
Obtain described audio frequency apparatus after opening the recording channel, the electric signal of each utmost point in a pair of audio frequency input extremely in its audio interface;
Electric signal according to each utmost point in the described a pair of audio frequency input is extremely identified described Mike's utmost point and earth polar;
Described sound signal transmitting element is docked with described Mike's utmost point, earth potential is docked with described earth polar.
15. DRM method for using license as claimed in claim 14, it is characterized in that, the method of obtaining the electric signal of each utmost point in the described a pair of audio frequency input extremely is: set up current channel between the described a pair of audio frequency input utmost point, access with reference to earth potential in the node of described current channel, obtain in the described a pair of audio frequency input extremely each utmost point with respect to the voltage relative value of described ground reference.
16. DRM method for using license as claimed in claim 14 is characterized in that, according to electric signal identification Mike's utmost point of each utmost point and the method in earth polar in the described a pair of audio frequency input extremely is:
The voltage relative value of each utmost point in the described a pair of audio frequency input is extremely compared with described ground reference respectively, obtain respectively a digital signal level according to separately comparative result;
Identify described Mike's utmost point and described earth polar according to two digital signal levels that obtain.
17. such as each described DRM method for using license of claim 11-16; it is characterized in that; also comprise downloads digital media file and DRM license file; wherein; described digital media file is kept on the audio frequency apparatus, and described DRM licence sends in the DRM protective device by the ciphertext form and stores.
18. such as each described DRM method for using license of claim 11-16, it is characterized in that, after authentication result is sent to described signal processing module, the DRM file of storage made amendment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210126842.2A CN103377323B (en) | 2012-04-26 | 2012-04-26 | Digital rights management (DRM) protecting device and DRM license using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210126842.2A CN103377323B (en) | 2012-04-26 | 2012-04-26 | Digital rights management (DRM) protecting device and DRM license using method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103377323A true CN103377323A (en) | 2013-10-30 |
| CN103377323B CN103377323B (en) | 2017-01-25 |
Family
ID=49462425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210126842.2A Active CN103377323B (en) | 2012-04-26 | 2012-04-26 | Digital rights management (DRM) protecting device and DRM license using method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103377323B (en) |
Citations (4)
| 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 |
| CN102098159A (en) * | 2010-07-28 | 2011-06-15 | 胡旭光 | Secret key device and method for mobile phone |
| CN102255730A (en) * | 2011-07-11 | 2011-11-23 | 吴沙林 | Digital certificate safety lock device and digital certificate authentication system and method |
| CN202177904U (en) * | 2011-07-08 | 2012-03-28 | 国民技术股份有限公司 | Intelligent encrypted key based on audio interface |
-
2012
- 2012-04-26 CN CN201210126842.2A patent/CN103377323B/en active Active
Patent Citations (4)
| 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 |
| CN102098159A (en) * | 2010-07-28 | 2011-06-15 | 胡旭光 | Secret key device and method for mobile phone |
| CN202177904U (en) * | 2011-07-08 | 2012-03-28 | 国民技术股份有限公司 | Intelligent encrypted key based on audio interface |
| CN102255730A (en) * | 2011-07-11 | 2011-11-23 | 吴沙林 | Digital certificate safety lock device and digital certificate authentication system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103377323B (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106022080B (en) | A kind of data ciphering method based on the cipher card of PCIe interface and the cipher card | |
| CN105099711B (en) | A kind of small cipher machine and data ciphering method based on ZYNQ | |
| CN102819702B (en) | File encryption operation method and file encryption operational system | |
| CN206348799U (en) | Encrypt storage device and safe storage system | |
| CN103377528B (en) | Payment devices and method of payment | |
| CN103378931A (en) | Data transmission method, data receiving method and signal processing module | |
| CN102752306B (en) | Digital media management method and system based on mark | |
| CN101227279A (en) | Device, system and method for encrypting and deciphering audio signal | |
| CN103379488A (en) | Secret key device and utilization method | |
| CN103376876B (en) | Audio Interface Unit and method for managing power supply thereof | |
| CN105516210A (en) | System and method for terminal security access authentication | |
| CN101567885A (en) | Voice call device as well as system and method thereof | |
| Chang et al. | Encryption technology of voice transmission in mobile network based on 3DES-ECC algorithm | |
| CN205232389U (en) | Frequency encoding and decoding SOC chip is looked to safe sound | |
| CN204808325U (en) | Carry out black equipment to data | |
| CN103377322A (en) | Digital rights management (DRM) protecting device and DRM license using method | |
| CN103377323A (en) | Digital rights management (DRM) protecting device and DRM license using method | |
| WO2008021709A3 (en) | Reduction of channel change time for digital media devices using key management and virtual smart cards | |
| CN106899545A (en) | A kind of system and method for terminal security communication | |
| CN104346556A (en) | Hard disk security protection system based on wireless security certification | |
| CN202694349U (en) | USBKey with variety of interface modes | |
| CN107590886A (en) | The method for unlocking and system of identity-based certification | |
| CN202563514U (en) | Mobile electronic equipment with multimedia authentication encryption protection function | |
| CN204836195U (en) | Small -size cipher machine based on ZYNQ | |
| CN103530161B (en) | A kind of wireless messages security equipment system and security protection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |