CN109982138A - A kind of drive-in movie audio transmission encryption system - Google Patents
A kind of drive-in movie audio transmission encryption system Download PDFInfo
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- CN109982138A CN109982138A CN201910358815.XA CN201910358815A CN109982138A CN 109982138 A CN109982138 A CN 109982138A CN 201910358815 A CN201910358815 A CN 201910358815A CN 109982138 A CN109982138 A CN 109982138A
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- China
- Prior art keywords
- module
- sent
- baseband signal
- audio
- parameter
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
- H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
- H04H60/23—Arrangements for conditional access to broadcast information or to broadcast-related services using cryptography, e.g. encryption, authentication, key distribution
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Circuit For Audible Band Transducer (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention relates to a kind of drive-in movie audio transmission encryption system, including emitter and several reception devices, emitter is sent to reception device after encrypting the audio signal that open-air cinema institutes shows a film, and reception device is received and played after decrypting.The present invention can effectively solve the problem that drive-in movie difficult charge problem, and the problem that disturbs residents.
Description
Technical field
The present invention relates to Audiotechnica field, in particular to a kind of drive-in movie audio transmission encryption system.
Background technique
Currently, drive-in movie comes into residential communities, admission fee is cheap and resident is facilitated to watch, therefore deep by numerous residents
It welcomes.Though drive-in movie is good, there is the puzzlement of two kinds of situations, first is that, the spectators not paid dues can see as the spectators to pay dues
It watches movie, i.e., businessman charges difficult；Second is that being not desired to the resident of viewing film, it can but hear the sound of film, that is, disturb residents.
Summary of the invention
In consideration of it, the embodiment of the present invention provides a kind of drive-in movie audio transmission encryption system.
To realize the above-mentioned technical purpose, the present invention takes following technical scheme: a kind of drive-in movie audio transmission encryption system
System, the encryption device includes emitter and reception device, the sound that the emitter shows a film open-air cinema institutes
The reception device is sent to after frequency signal encryption, the reception device is received and played after decrypting.
The emitter includes encrypting module, and the encrypting module is used to cryptographic parameter being added to audio signal, and
To audio signal put in order carry out infilling adjustment after be sent to the reception device；The reception device includes decryption mould
Block, the deciphering module are decrypted putting in order for audio signal for separating cryptographic parameter from audio signal
It is played after adjustment.
The encrypting module includes sending controller, message sink coding module and digital encryption module；The transmission controller
For cryptographic parameter to be sent to message sink coding module；The message sink coding module is used to receive cryptographic parameter and audio signal,
And audio signal is compressed, noise reduction and coded treatment formation baseband signal；The message sink coding module adds cryptographic parameter
Enter to baseband signal, and baseband signal is sent to the digital encryption module；The digital encryption module is according to the transmission
The control coded signal that controller is sent, carries out infilling adjustment for putting in order for baseband signal；The deciphering module includes adding
Close parameters separated module receives controller and digital deciphering module；The encryption parameter separation module is encrypted for receiving
Baseband signal, and cryptographic parameter is separated from baseband signal, and the cryptographic parameter isolated is sent to the reception and is controlled
Device, and baseband signal is sent to the digital decrypted module, the reception controller carries out its received cryptographic parameter
Identification is sent to the digital decrypted module to judge whether to control decryption signal, when the digital decrypted module receives
When control decryption signal, adjustment is decrypted in putting in order for baseband signal.
The transmission controller includes key group, and the key group is used to input cryptographic parameter and opens control instruction, and
It by cryptographic parameter and opens control instruction and is sent to the message sink coding module, the message sink coding module will open control instruction
Baseband signal is added to cryptographic parameter；The encryption parameter separation module is used for cryptographic parameter and opens control instruction
It is separated from baseband signal, and by the cryptographic parameter isolated and opens control instruction and be sent to the reception controller, it is described
Controller is received to its received cryptographic parameter and opens control instruction and identifies, when cryptographic parameter and to open control instruction equal
When verification passes through, control decryption signal is sent.
The reception device further includes electronic switch, audio amplification block and stereophone；The electronic switch receives
Baseband signal after deciphering module decryption, and according to whether receive that the transmission controller sends opens control instruction
It is determined whether to enable when the electronic switch is opened, baseband signal is sent to the audio and amplifies mould by the electronic switch
After block carries out audio amplification, played by the stereophone.
Each reception device is provided with number, and the emitter is according to the number to the corresponding reception
Device carries out control extension.
Using wireless communication between the emitter and reception device.
The invention adopts the above technical scheme, which has the following advantages:
The present invention is encrypted by the audio signal showed a film to open-air cinema institutes, and is targetedly decrypted,
So that the spectators to pay dues can see image but also hear sound；Non- payor can only see image, can't hear sound；It is not desired to see
The resident to watch movie, bothers from film audio；Therefore, drive-in movie difficult charge problem is not only solved, is also solved outdoor
Movie theatre disturbs residents problem.
Design structure of the present invention is simple, at low cost, can be widely applied to Audiotechnica field.
Detailed description of the invention
Fig. 1 is a kind of knot of the one of embodiment of emitter of drive-in movie audio transmission encryption system of the invention
Structure block diagram；
Fig. 2 is a kind of structural frames of the one of embodiment of reception device of drive-in movie audio transmission encryption system of the invention
Figure；
Fig. 3 is a kind of Dolby AC-3 base of the message sink coding module output of drive-in movie audio transmission encryption system of the invention
The structure chart of one frame of band signal.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figures 1 to 3, the embodiment of the present invention provides a kind of drive-in movie audio transmission encryption system, the encryption device
May include emitter 1 and several reception devices 2, the quantity of reception device 2 according to actual needs, such as place, resident's number
It is determined, herein without limiting；Emitter 1 is sent to after encrypting the audio signal that open-air cinema institutes shows a film
Reception device 2, reception device 2 are received and are played after decrypting.
It is encrypted by the audio signal that above scheme shows a film to open-air cinema institutes, and targetedly carried out
Decryption, so that the spectators to pay dues can see image but also hear sound；Non- payor can only see image, can't hear sound；
It is not desired to the resident of viewing film, is bothered from film audio；Therefore, drive-in movie difficult charge problem is not only solved, is also solved
Drive-in movie disturbs residents problem.
In a preferred embodiment, in order to effectively improve cipher round results, drive-in movie is avoided to show a film non-
Method equipment plays after receiving, and emitter 1 may include encrypting module 11, and encrypting module 11 is used to cryptographic parameter being added to sound
Frequency signal, and infilling adjustment is carried out to putting in order for audio signal, after realizing encryption purpose, it is sent to reception device 2；
Correspondingly, reception device 2 may include deciphering module 21, deciphering module 21 is used to divide cryptographic parameter from audio signal
From, and adjustment is decrypted to putting in order for audio signal, it is played after decrypting purpose with realization.
In one embodiment, in order to effectively avoid the sound of film, vision signal illegal by digital audio FM receiver
It is played after reception, encrypting module 11 may include: to send controller 111, message sink coding module 112 and digital encryption module 113；
Controller 111 is sent to be used to cryptographic parameter being sent to message sink coding module 112；Message sink coding module 112 is for receiving
Cryptographic parameter and audio signal, and audio signal is compressed, noise reduction and coded treatment formation baseband signal, the present embodiment
Baseband signal is Dolby AC-3(Dolby AC-3) baseband signal, but not limited to this, and message sink coding module 112 is used for password
Parameter is added to baseband signal, and the present embodiment is the auxiliary data field that cryptographic parameter is added to Dolby AC-3 baseband signal
In AUX, message sink coding module 112 is also used to for baseband signal being sent to digital encryption module 113, and digital encryption module 113
The control coded signal sent according to controller 111 is sent, carries out infilling adjustment for putting in order for baseband signal, the present embodiment is
The position of AB0~AB5 in the baseband signal of Dolby AC-3 this 6 audio blocks is re-started into arrangement, to realize encryption mesh
's；
Correspondingly, deciphering module 21 may include encryption parameter separation module 211, receive controller 212 and digital deciphering module
213；
Encryption parameter separation module 211 is used for cryptographic parameter from baseband signal for receiving encrypted baseband signal
Separation, and the cryptographic parameter isolated is sent to and receives controller 212, and baseband signal is sent to digital decrypted module
213, it receives controller 212 and its received cryptographic parameter is identified, be sent to number to judge whether to control decryption signal
Word deciphering module 213, when digital decrypted module 213 receives control decryption signal, by the progress that puts in order of baseband signal
Decryption adjustment, the present embodiment be by the position of AB0~AB5 in the baseband signal of Dolby AC-3 this 6 audio blocks again into
Row arrangement returns to original put in order to realize decryption purpose.
In a preferred embodiment, in order to which the reliable and stable transmission for effectively ensuring audio signal and processing are analyzed,
Emitter 1 can also include analog-to-digital conversion module 12, channel coding module 13 and modulate emission module 14；
Analog-to-digital conversion module 12 is connect with the sound source 3 that open-air cinema institutes shows a film, for converting audio signals into number
Encrypting module 11 is sent to after signal (0,1), the present embodiment is the message sink coding module 112 for being sent to encrypting module 11, through adding
Close module 11 is sent to channel coding module 13 after encrypting, channel coding module 13 receives and is sent to modulation hair after being handled
Penetrate module 14, modulate emission module 14 receive and be modulated to form radiofrequency signal after be sent to reception device 2；
Correspondingly, reception device 2 includes demodulator 22, demodulator 22 is used to receive the audio signal of the transmission of modulate emission module 14
And it is demodulated to be sent to deciphering module 21 after obtaining baseband signal；In the present embodiment, the demodulation of demodulator 22 obtains Dolby
The baseband signal of AC-3；Baseband signal is sent to the encryption parameter separation module 211 of deciphering module 21 in the present embodiment.
In a preferred embodiment, personnel (such as businessman or theater management) control for ease of operation, send control
Device 111 processed include display 1111 and key group 1112, key group 1112 can be set to for input open control instruction and
Cryptographic parameter, and control instruction will be opened and cryptographic parameter is sent to message sink coding module 112, message sink coding module 112 will be opened
Logical control instruction and cryptographic parameter are added to baseband signal, and the present embodiment is by cryptographic parameter and to open control instruction and be added
Into the auxiliary data field AUX of Dolby AC-3 baseband signal；Display 1111 can be set to for showing opening for input
Logical control instruction and cryptographic parameter, so that whether operator can to calibrate its input correct, or for showing other operations
Personnel it should be understood that information, such as current spectators' number, next movie name and projection time；
Correspondingly, encryption parameter separation module 211 is used for cryptographic parameter and opens control instruction from baseband signal and separate, and
The cryptographic parameter isolated is sent to reception controller 212 with control instruction is opened, it is received close to its to receive controller 212
Code parameter and open control instruction and identified, when cryptographic parameter and open control instruction verify pass through when, send control and solve
Secret letter number.
In a preferred embodiment, it controls and uses for the ease of spectators, and improve volume and audio, reception device
2 further include D/A converter module 23, electronic switch 24, audio amplification block 25 and stereophone 26；
D/A converter module receives the audio signal after the decryption that encrypting module 21 is sent, and the present embodiment is to receive encrypting module 21
The baseband signal that sends of digital decrypted module 213, and will audio signal carry out digital-to-analogue conversion after be sent by electronic switch 24
After carrying out audio amplification to audio amplification block 25, spectators are played to by stereophone 26, wherein 24 basis of electronic switch
Whether receive send controller 212 send open control instruction it is determined whether to enable, when electronic switch 24 receive it is open-minded
It when control instruction, opens, at this point, audio amplification block 25 can receive audio signal, and then stereophone 26 can incite somebody to action
Audio plays to spectators；Control instruction is opened when electronic switch 24 cannot receive, is closed, at this point, audio amplification block 25 is not
Audio signal can be received, and then audio can not be played to spectators by stereophone 26.
In a preferred embodiment, for the ease of the cooperation and identification between sending device 1 and reception device 2,
Convenient for being targetedly managed control, each reception device 1 is provided with number, and prestores in sending device 2 and respectively connect
The number of receiving apparatus 1, sending device 1 can according to the actual situation (such as first motion picture projection is complete, before second motion picture projection),
Corresponding reception device 1 is controlled according to number, in the present embodiment, each reception device is issued by the control of key group 1112
1 cryptographic parameter receives cryptographic parameter and enters normally after opening control instruction with control instruction, correspondingly received device 1 is opened
The spectators of working condition, vote buying can hear normal film audio, before showing second film, to each reception device 1
It is reset, including changes cryptographic parameter, ensure the normal projection of second film.
In a preferred embodiment, it for the ease of spectators' use, can be adopted between emitter 1 and reception device 2
With wireless communication, communicated between the emitter and reception device of the present embodiment by wireless antenna, but not limited to this,
It in other embodiments, can also be using bluetooth, WIFI etc..
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Specific embodiment is applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (7)
1. a kind of drive-in movie audio transmission encryption system, it is characterised in that: the encryption device includes emitter and reception
Device；
The emitter is sent to the reception device after encrypting the audio signal that open-air cinema institutes shows a film, described
Reception device is received and is played after decrypting.
2. a kind of drive-in movie audio transmission encryption system as described in claim 1, it is characterised in that: the emitter includes
Encrypting module；The encrypting module is used to cryptographic parameter being added to audio signal, and the progress that puts in order to audio signal
The reception device is sent to after infilling adjustment；
The reception device includes deciphering module, and the deciphering module is used to separate cryptographic parameter from audio signal, and right
The putting in order of audio signal plays after adjustment is decrypted.
3. a kind of drive-in movie audio transmission encryption system as claimed in claim 2, it is characterised in that: the encrypting module includes
Send controller, message sink coding module and digital encryption module；
The transmission controller is used to cryptographic parameter being sent to message sink coding module；The message sink coding module is close for receiving
Code parameter and audio signal, and audio signal is compressed, noise reduction and coded treatment formation baseband signal；The message sink coding
Cryptographic parameter is added to baseband signal by module, and baseband signal is sent to the digital encryption module；The digital encryption
The control coded signal that module is sent according to the transmission controller, carries out infilling adjustment for putting in order for baseband signal；
The deciphering module includes encryption parameter separation module, receives controller and digital deciphering module；The encryption parameter point
From module for receiving encrypted baseband signal, and the password that cryptographic parameter is separated from baseband signal, and will be isolated
Parameter is sent to the reception controller, and baseband signal is sent to the digital decrypted module, the reception controller
Its received cryptographic parameter is identified, is sent to the digital decrypted module to judge whether to control decryption signal, when
When the digital decrypted module receives control decryption signal, adjustment is decrypted in putting in order for baseband signal.
4. a kind of drive-in movie audio transmission encryption system as claimed in claim 3, it is characterised in that: the transmission controller packet
Include key group；The key group by cryptographic parameter and opens control instruction for inputting cryptographic parameter and opening control instruction
It is sent to the message sink coding module, the message sink coding module will open control instruction and cryptographic parameter and be added to base band letter
Number；
The encryption parameter separation module is used for cryptographic parameter and opens control instruction from baseband signal and separate, and will separation
Cryptographic parameter out is sent to the reception controller with control instruction is opened, and the reception controller joins its received password
Number and open control instruction and identified, when cryptographic parameter and open control instruction verify pass through when, send control and solve secret letter
Number.
5. a kind of drive-in movie audio transmission encryption system as claimed in claim 3, it is characterised in that: the reception device is also wrapped
Include electronic switch, audio amplification block and stereophone；
The electronic switch receives the baseband signal after the deciphering module decryption, and according to whether receives the transmission control
What device was sent open control instruction, and it is determined whether to enable when the electronic switch is opened, the electronic switch is by baseband signal
After being sent to the audio amplification block progress audio amplification, played by the stereophone.
6. a kind of drive-in movie audio transmission encryption system as described in claim 1, it is characterised in that: each reception device
It is provided with number, the emitter controls the corresponding reception device according to the number.
7. a kind of drive-in movie audio transmission encryption system as described in claim 1, it is characterised in that: the emitter and connect
Using wireless communication between receiving apparatus.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910358815.XA CN109982138A (en) | 2019-04-30 | 2019-04-30 | A kind of drive-in movie audio transmission encryption system |
| PCT/CN2019/000110 WO2020220149A1 (en) | 2019-04-30 | 2019-05-28 | Open-air cinema audio transmission encryption system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910358815.XA CN109982138A (en) | 2019-04-30 | 2019-04-30 | A kind of drive-in movie audio transmission encryption system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109982138A true CN109982138A (en) | 2019-07-05 |
Family
ID=67087245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910358815.XA Withdrawn CN109982138A (en) | 2019-04-30 | 2019-04-30 | A kind of drive-in movie audio transmission encryption system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109982138A (en) |
| WO (1) | WO2020220149A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111031361A (en) * | 2019-12-25 | 2020-04-17 | 白钢 | Open-air cinema system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3654617A1 (en) * | 2014-11-14 | 2020-05-20 | GN Hearing A/S | Hearing instrument with an authentication protocol |
| TWI578187B (en) * | 2016-03-30 | 2017-04-11 | 新唐科技股份有限公司 | Data protection method |
| CN106209313B (en) * | 2016-07-06 | 2019-03-29 | 歌尔股份有限公司 | Data transmission method and system |
| CN106210786B (en) * | 2016-07-25 | 2019-10-08 | 大唐创新港投资（北京）有限公司 | A kind of SmartMovie system and movie playback method |
-
2019
- 2019-04-30 CN CN201910358815.XA patent/CN109982138A/en not_active Withdrawn
- 2019-05-28 WO PCT/CN2019/000110 patent/WO2020220149A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111031361A (en) * | 2019-12-25 | 2020-04-17 | 白钢 | Open-air cinema system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020220149A1 (en) | 2020-11-05 |
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Application publication date: 20190705 |