CN102833530B - A kind of low-frequency band image transmission system and its implementation - Google Patents
A kind of low-frequency band image transmission system and its implementation Download PDFInfo
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 47
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- 238000009738 saturating Methods 0.000 abstract description 3
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Abstract
The invention discloses a kind of low-frequency band image transmission system and its implementation, comprise picture collection module and image display module, picture collection module comprises main key scan module, main control unit, image acquisition units and main radio-frequency module, main control unit controls image acquisition units image data after receiving main key scan module by signal, image data is carried out package and is imported main radio-frequency module by main control unit, and main control unit controls main radio-frequency module and launches or receive data-signal; Main radio-frequency module receives the feedback data signal that image display module sends.Main radio-frequency module and a point radio-frequency module working frequency range are set as 400-960MHz by the present invention, and saturating ability is strong, meets the need of market; Utilize main control unit to control main radio-frequency module simultaneously and send M >=5 frame data signals continuously, then image acquisition units receives the N >=1 frame feedback data information that point radio-frequency module sends, and improves data transmission bauds by the ratio increasing launch time and transmitter trigger time.
Description
Technical field
The present invention relates to image transmission technology field, especially relate to a kind of low-frequency band image transmission system and its implementation.
Background technology
Image transmission, the large feature of one is exactly that image data amount is large, realize wireless transmission, and just necessary transmission rate at a high speed could be practical, realizes this object at present, and be substantially all the frequency with high band, modulating data carrier wave gets on.Therefore the frequency range such as 2.4GHz, 5.8GHz, 26GHz is by the optimum frequency band selecting image to transmit.Although it can transmit view data fast and effectively, itself frequency is high, and wavelength is short, causes the non-constant of penetration power, limits the environment for use of these frequency ranges, and as bluetooth, WIFI etc., can only do closely straight line and transmit without barrier.
As shown in Figure 7 and Figure 8, rfic chip has data transmission rate at a high speed, lower frequency range, outstanding compression algorithm, high-quality wireless transmission protocol, realizes data wireless transmission, usually adopts the mode of launch and accept, tradition transmitting-receiving sequential has two kinds: one, formula received by single-shot list, namely comprises transmission one bag data TX and receives a bag data RX rf period; Two, monolateral launch and accept formula, i.e. a transmitting data TX, while receive only data RX, without Two-way Feedback.This two classes sequential can realize data wireless transmission, but there is certain shortcoming: mode one, though can two-way realization receive and dispatch, time loss is in the startup and transmitting-receiving conversion of radio frequency greatly simultaneously, cause data transmission rate low, the situation of the mass data such as transmitting image information can not be met; Mode two, can realize mass data transmission, but the validity of data, integrality can not be guaranteed.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, providing a kind of ratio by increasing launch time and transmitter trigger time to improve low-frequency band image transmission system and its implementation of data transmission bauds.
For reaching above-mentioned purpose, a kind of low-frequency band image transmission system of the present invention, it comprises picture collection module and image display module, described picture collection module comprises main key scan module, main control unit, image acquisition units and main radio-frequency module, described main key scan module in charge scanning button, and send signal to main control unit and process, described main control unit controls image acquisition units image data after receiving main key scan module by signal, image data is carried out package and is imported described main radio-frequency module by described main control unit, described main control unit controls main radio-frequency module and launches or receive data-signal, described main radio-frequency module receives the feedback data signal that image display module sends.
Further, also comprise speech processing module, described main control unit controls speech processing module image data.
Further, the frequency range that described main radio-frequency module image transmits is 400-960MHz.
Further, described main radio-frequency module comprises main radio frequency chip, main signal amplifier circuit unit, main low noise amplifier unit and main antenna unit, described main signal amplifying circuit and main low noise amplifier unit and main antenna unit are electrically connected, described main signal amplifying circuit is used for the data transmission power of main radio frequency chip to amplify, and described main low noise amplifier unit is for strengthening the data receiver sensitivity of main radio frequency chip.
For reaching above-mentioned purpose, a kind of low-frequency band image transmission system of the present invention, it comprises picture collection module and image display module, described image display module comprises a point key scan module, the second control unit, image-display units and point radio-frequency module, described point of key scan module in charge scanning button, and signal is sent to the second control unit and process; Described second control unit reads the data of described point of radio-frequency module reception and analyzing and processing receives data, feeds back signal to described IMAQ module by a point radio-frequency module simultaneously; The reception data-signal image of described point of radio-frequency module shows by described image-display units.
Further, the frequency range of described point of radio-frequency module image transmission is 400-960MHz.
Further, described point of radio-frequency module comprises a point radio frequency chip, sub-signal amplifier circuit unit, point low noise amplifier unit and divided antenna unit, described sub-signal amplifying circuit and point low noise amplifier unit and divided antenna unit are electrically connected, described sub-signal amplifying circuit is used for the data transmission power of point radio frequency chip to amplify, and described point of low noise amplifier unit is for strengthening the data receiver sensitivity of point radio frequency chip.
The implementation method of a kind of low-frequency band image transmission system of the present invention, comprises the implementation method of picture collection module, and the implementation method step of picture collection module is as follows:
A), when main control unit detects that main key scan module is started working, image acquisition units gathers sample pictures and is converted to data-signal;
B) main control unit carries out package process to the data-signal gathered;
C) M >=5 frame data in the data-signal of package process are loaded main radio-frequency module by main control unit;
D) main control unit controls main radio-frequency module and enters emission mode, and described main radio-frequency module starts to be launched and is sent by M >=5 frame data;
E) described main control unit judges whether the data of radio-frequency module send; If main radio-frequency module data do not send, then proceed to step D; If the data validation of main radio-frequency module sends, then proceed to step F);
F) main control unit controls main radio-frequency module and enters receiving mode, and described main radio-frequency module receives the feedback data signal that image display module sends, if main radio-frequency module does not receive feedback data signal, proceeds to step D); If main radio-frequency module receives feedback data signal, proceed to step G);
G) main control unit analysis judges the feedback data signal that image display module sends, and controls to judge that M >=5 frame data that main radio-frequency module sends carry out the need of resending, if need to resend, then proceeds to step D); If do not need to resend, then proceed to step H);
H) main control unit judges that whether M >=5 frame data that main radio-frequency module sends are complete, if main control unit judges transmission, data are imperfect, then proceed to step C); If main control unit judges to send data integrity, then proceed to steps A).
The implementation method of a kind of low-frequency band image transmission system of the present invention, comprises the implementation method of image display module, and the implementation method step of image display module is as follows:
A) divide radio-frequency module to enter receiving mode, point radio-frequency module receives the data message of IMAQ module;
B) the second control unit reads the reception data of point radio-frequency module;
C) the reception reception data of the second control unit to point radio-frequency module judge, if the second control unit judges to receive data correctly, then proceed to steps d); If it is incorrect that the second control unit judges to receive data, then proceed to step e);
D) the second control unit judges that whether reception data are complete, if main control unit judges reception, data are imperfect, then proceed to step e); If main control unit judges to receive data integrity, then proceed to step f);
E) the second control unit loads error message and sends N >=1 frame feedback data signal to IMAQ module by a point radio-frequency module 240;
F) reception data are issued image-display units and are shown by the second control unit.
In sum, the working frequency range of main radio-frequency module and point radio-frequency module is set as 400-960MHz by a kind of low-frequency band image transmission system of the present invention and its implementation, and saturating ability is strong, meets the need of market; Utilize main control unit to control main radio-frequency module simultaneously and send M >=5 frame data signals continuously, then image acquisition units receives the N >=1 frame feedback data information that point radio-frequency module sends, and improves data transmission bauds by the ratio increasing launch time and transmitter trigger time.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of a kind of low-frequency band image transmission system of the present invention.
Fig. 2 is the structure principle chart of radio-frequency module main shown in Fig. 1.
Fig. 3 is the structure principle chart of point radio-frequency module shown in Fig. 1.
Fig. 4 is the flow chart of the implementation method of image acquisition units of the present invention shown in Fig. 1.
Fig. 5 is the flow chart of the implementation method of image display module of the present invention shown in Fig. 1.
The running fire that Fig. 6 is the implementation method of a kind of low-frequency band image transmission system of the present invention shown in Fig. 1 connects receives sequential chart.
Fig. 7 is that formula sequential chart received by the single-shot list of conventional images transmission system.
Fig. 8 is the monolateral launch and accept formula sequential chart of conventional images transmission system.
Embodiment
For feature of the present invention, technological means and the specific purposes reached, function can be understood further, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Refer to Fig. 1 to Fig. 6, a kind of low-frequency band image transmission system of the present invention comprises picture collection module 100 and image display module 200, described picture collection module 100 comprises main key scan module 110, main control unit 120, image acquisition units 130, speech processing module 150 and main radio-frequency module 140, described key scan module 110 is responsible for scanning button, and signal is sent to main control unit 120 and process, described main control unit 120 controls image acquisition units 130 and speech processing module 150 image data after receiving main key scan module 110 signal; Image data is carried out package and is imported described main radio-frequency module 140 by described main control unit 120, described main control unit 120 controls main radio-frequency module 140 and launches or receive data-signal, and the analysis of described main control unit 120 judges that whether main radio-frequency module 140 data-signal is complete.The frequency range that described main radio-frequency module 140 image transmits is below 1GHz frequency range, and present embodiment Mid Frequency is 400-960MHz, makes image transmitted frequency relatively low, wavelength is longer, ability around object is stronger, and namely penetration capacity is strong, is applicable to family gate inhibition safety monitoring and uses.
Described main radio-frequency module 140 comprises main radio frequency chip 141, main signal amplifier circuit unit 142, main low noise amplifier unit 143 and main antenna unit 144, described main radio frequency chip 141 model is A7128, described main signal amplifying circuit 142 and main low noise amplifier unit 143 are electrically connected with main antenna unit 144, described main signal amplifying circuit 142 is for amplifying the data transmission power of main radio frequency chip 141, and described main low noise amplifier unit 143 is for strengthening the data receiver sensitivity of main radio frequency chip 141.
Described image display module 200 comprises point key scan module 210, second control unit 220, image-display units 230 and point radio-frequency module 240, described point of key scan module 210 is responsible for scanning button, and signal is sent to the second control unit 220 and process; Described second control unit 220 reads the data of described point of radio-frequency module 240 reception and analyzing and processing receives data, feeds back signal to described IMAQ module 100 by a point radio-frequency module 240 simultaneously; The reception data-signal image of described point of radio-frequency module 240 shows by described image-display units 230.
The frequency range of described point of radio-frequency module 240 image transmission is below 1GHz frequency range, and present embodiment Mid Frequency is 400-960MHz; Described point of radio-frequency module 240 comprises point radio frequency chip 241, sub-signal amplifier circuit unit 242, point low noise amplifier unit 243 and divided antenna unit 244, described point of radio frequency chip 241 model is A7128, described sub-signal amplifying circuit 242 and point low noise amplifier unit 243 are electrically connected with divided antenna unit 244, described sub-signal amplifying circuit 242 is for amplifying the data transmission power of point radio frequency chip 241, and described point of low noise amplifier unit 243 is for strengthening the data receiver sensitivity of point radio frequency chip 241.
The implementation method of described a kind of low-frequency band image transmission system comprises the implementation method of picture collection module and the implementation method of image display module, and wherein, the implementation method step of picture collection module is as follows:
A), when main control unit 120 detects that main key scan module 110 is started working, image acquisition units 130 pairs of sample pictures gather and are converted to data-signal;
B) main control unit 120 carries out package process to the data-signal gathered;
C) M >=5 frame data in the data-signal of package process are loaded main radio-frequency module 140 by main control unit 120;
D) main control unit 120 controls main radio-frequency module 140 and enters emission mode, and described main radio-frequency module 140 starts to be launched and is sent by M >=5 frame data;
E) described main control unit 120 judges whether the data of radio-frequency module send; If main radio-frequency module 140 data do not send, then proceed to step D; If the data validation of main radio-frequency module 140 sends, then proceed to step F);
F) main control unit 120 controls main radio-frequency module 140 and enters receiving mode, and described main radio-frequency module 140 receives the feedback data signal that image display module 200 sends, if main radio-frequency module 140 does not receive feedback data signal, proceeds to step D); If main radio-frequency module 140 receives feedback data signal, proceed to step G);
G) main control unit 120 analysis judges the feedback data signal that image display module 200 sends, and controls to judge that M >=5 frame data that main radio-frequency module 140 sends carry out the need of resending, if need to resend, then proceeds to step D); If do not need to resend, then proceed to step H);
H) main control unit 120 judges that whether M >=5 frame data that main radio-frequency module 140 sends are complete, if main control unit 120 judges transmission, data are imperfect, then proceed to step C); If main control unit 120 judges to send data integrity, then proceed to steps A).
The implementation method of described image display module, step is as follows:
A) divide radio-frequency module 240 to enter receiving mode, point radio-frequency module 240 receives the data message of IMAQ module 100;
B) the second control unit 220 reads the reception data of point radio-frequency module 240;
C) the reception reception data of the second control unit 220 to point radio-frequency module 240 judge, if the second control unit 220 judges to receive data correctly, then proceed to steps d); If it is incorrect that the second control unit 220 judges to receive data, then proceed to step e);
D) the second control unit 220 judges that whether reception data are complete, if the second control unit 220 judges reception, data are imperfect, then proceed to step e); If the second control unit 220 judges to receive data integrity, then proceed to step f);
E) the second control unit 220 loads error message and sends N >=1 frame feedback data signal to IMAQ module 100 by a point radio-frequency module 240; Main control unit 120 controls main radio-frequency module 140 and sends M >=5 frame data signals continuously, and then image acquisition units 130 receives N >=1 frame feedback data information, improves data transmission bauds by the ratio increasing launch time and transmitter trigger time; For the resolution of 320X240, the continuous transmission frame per second of video can bring up to 16 frames/second;
F) reception data are issued image-display units 230 and are shown by the second control unit 220.
In sum, the working frequency range of main radio-frequency module 140 and point radio-frequency module 240 is set as 400-960MHz by a kind of low-frequency band image transmission system of the present invention and its implementation, and saturating ability is strong, meets the need of market; Utilize main control unit 120 to control main radio-frequency module 140 simultaneously and send M (M >=5) frame data signals continuously, then image acquisition units 130 receives N (N >=1) the frame feedback data information that point radio-frequency module 240 sends, and improves data transmission bauds by the ratio increasing launch time and transmitter trigger time.
The above embodiment only have expressed one embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as limitation of the scope of the invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with claims.
Claims (2)
1. the implementation method of a low-frequency band image transmission system, described low-frequency band image transmission system comprises: picture collection module (100) and image display module (200), described picture collection module (100) comprises main key scan module (110), main control unit (120), image acquisition units (130) and main radio-frequency module (140), described main key scan module (110) is responsible for scanning button, and signal is sent to main control unit (120) and process, described main control unit (120) controls image acquisition units (130) image data after receiving main key scan module (110) signal, image data is carried out package and is imported described main radio-frequency module (140) by described main control unit (120), described main control unit (120) controls main radio-frequency module (140) and launches or receive data-signal, described main radio-frequency module (140) receives the feedback data signal that image display module (200) sends, and it is characterized in that, comprise the implementation method of picture collection module, the implementation method step of picture collection module is as follows:
A), when main control unit (120) detects that main key scan module (110) is started working, image acquisition units (130) gathers sample pictures and is converted to data-signal;
B) main control unit (120) carries out package process to the data-signal gathered;
C) M >=5 frame data in the data-signal of package process are loaded main radio-frequency module (140) by main control unit (120);
D) main control unit (120) controls main radio-frequency module (140) and enters emission mode, and the startup of described main radio-frequency module (140) is launched and sent by M >=5 frame data;
E) described main control unit (120) judges whether the data of radio-frequency module send; If main radio-frequency module (140) data do not send, then proceed to step D; If the data validation of main radio-frequency module (140) sends, then proceed to step F);
F) main control unit (120) controls main radio-frequency module (140) and enters receiving mode, described main radio-frequency module (140) receives the feedback data signal that image display module (200) sends, if main radio-frequency module (140) does not receive feedback data signal, proceeds to step D); If main radio-frequency module (140) receives feedback data signal, proceed to step G);
G) main control unit (120) analysis judges the feedback data signal that image display module (200) sends, and control to judge that M >=5 frame data that main radio-frequency module (140) sends carry out the need of resending, if need to resend, then proceed to step D); If do not need to resend, then proceed to step H);
H) main control unit (120) judges that whether M >=5 frame data that main radio-frequency module (140) sends are complete, if main control unit (120) judges transmission, data are imperfect, then proceed to step C); If main control unit (120) judges to send data integrity, then proceed to steps A).
2. the implementation method of a low-frequency band image transmission system, described low-frequency band image transmission system comprises picture collection module (100) and image display module (200), described image display module (200) comprises a point key scan module (210), the second control unit (220), image-display units (230) and point radio-frequency module (240), described point of key scan module (210) is responsible for scanning button, and signal is sent to the second control unit (220) and process; Described second control unit (220) reads data that described point radio-frequency module (240) receives and analyzing and processing receives data, feeds back signal to described IMAQ module (100) by a point radio-frequency module (240) simultaneously; The reception data-signal image of described point of radio-frequency module (240) shows by described image-display units (230), it is characterized in that, comprises the implementation method of image display module, and the implementation method step of image display module is as follows:
A) divide radio-frequency module (240) to enter receiving mode, point radio-frequency module (240) receives the data message of IMAQ module (100);
B) the second control unit (220) reads the reception data of point radio-frequency module (240);
C) the reception reception data of the second control unit (220) to point radio-frequency module (240) judge, if the second control unit (220) judges to receive data correctly, then proceed to steps d); If it is incorrect that the second control unit (220) judges to receive data, then proceed to step e);
D) the second control unit (220) judges that whether reception data are complete, if described second control unit (220) judges reception, data are imperfect, then proceed to step e); If the judgement of described second control unit (220) receives data integrity, then proceed to step f);
E) the second control unit (220) loads error message and sends N >=1 frame feedback data signal to IMAQ module (100) by point radio-frequency module (240);
F) reception data are issued image-display units (230) and are shown by the second control unit (220).
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| CN201063768Y (en) * | 2007-07-31 | 2008-05-21 | 中国矿业大学 | Mining safety type emergent rescue wireless audio/video relay |
| CN101477720A (en) * | 2009-01-13 | 2009-07-08 | 许仁德 | Gate inhibition system |
| CN201846431U (en) * | 2010-09-02 | 2011-05-25 | 北京惟泰安全设备有限公司 | Wireless audio and video transmission system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201063768Y (en) * | 2007-07-31 | 2008-05-21 | 中国矿业大学 | Mining safety type emergent rescue wireless audio/video relay |
| CN101477720A (en) * | 2009-01-13 | 2009-07-08 | 许仁德 | Gate inhibition system |
| CN201846431U (en) * | 2010-09-02 | 2011-05-25 | 北京惟泰安全设备有限公司 | Wireless audio and video transmission system |
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