CN211656299U - Multimedia teaching equipment based on CMMB receiving terminal - Google Patents
Multimedia teaching equipment based on CMMB receiving terminal Download PDFInfo
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- CN211656299U CN211656299U CN201922066199.9U CN201922066199U CN211656299U CN 211656299 U CN211656299 U CN 211656299U CN 201922066199 U CN201922066199 U CN 201922066199U CN 211656299 U CN211656299 U CN 211656299U
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Abstract
A multimedia teaching device based on a CMMB receiving terminal comprises a frequency tuner connected with the output end of a CMMB signal, a signal processing module connected with the output end of the radio frequency tuner, a signal receiving module and a multimedia processor which are sequentially connected with the signal processing module; the multimedia processor comprises a display screen and a loudspeaker which are arranged on the surface of the multimedia processor, and also comprises an audio/video decoder which is arranged in the multimedia processor and a memory which is used for storing teaching video and PPT courseware; and the input port of the multimedia processor is connected with the output end of the signal receiving module, and the output port of the multimedia processor is connected with the mobile intelligent terminal. The proposal effectively makes up the poor constraint of the network state, promotes the function of the teaching equipment and meets the requirement of learning by people at any time and any place.
Description
Technical Field
The utility model relates to a multimedia education technical field, concretely relates to multimedia teaching device based on CMMB receiving terminal.
Background
With the rapid development of mobile and wireless networks in recent years, the dependence and the viscosity of people on the internet are increasing day by day, and the networks have become an indispensable part of people's life, study and work; however, in densely populated areas, the rapidly increasing traffic may cause the communication base station to exceed its upper load limit. In such a scenario, it often happens that the network cannot be used normally due to poor network signal.
Nowadays, product intelligence has become an important index and a main trend for commodity updating. Multimedia teaching with multiple functions integrated into a whole has become an indispensable advanced teaching means, so various education institutions are building multimedia teaching equipment vigorously to perfect multimedia teaching technology. Since the activation of mobile multimedia broadcast television, CMMB is becoming familiar to the public as a "new media". The CMMB mobile multimedia service covers tens of thousands of users nationwide, the sales volume of CMMB demodulation chips is broken through, and mobile phones, video external equipment and navigation equipment are increasingly exploded in the electronic market as CMMB terminals. As a battery-powered terminal, compared with a mobile network and a wireless network, the application scenario of the CMMB is not limited by bandwidth and network signals, and the use cost is low, so that the CMMB can be widely applied to various environments with unsmooth networks.
Therefore, a mobile terminal with a CMMB teaching function is urgently needed to meet the requirement of people to learn through videos anytime and anywhere.
SUMMERY OF THE UTILITY MODEL
In order to meet the requirement, the utility model provides a multimedia teaching equipment based on CMMB receiving terminal has effectively compensatied the not good constraint nature of network state, for education work provides technical support, satisfies the demand that people carried out study anytime and anywhere.
The utility model discloses an above-mentioned technical problem is solved to following technical means:
a multimedia teaching device based on a CMMB receiving terminal comprises a frequency tuner connected with the output end of a CMMB signal, a signal processing module connected with the output end of the radio frequency tuner, a signal receiving module and a multimedia processor which are sequentially connected with the signal processing module;
the input port of the multimedia processor is connected with the output end of the signal receiving module, and the output port of the multimedia processor is connected with the mobile intelligent terminal;
the multimedia processor comprises a display screen and a loudspeaker which are arranged on the surface of the multimedia processor, and also comprises an audio/video decoder which is arranged in the multimedia processor and a memory which is used for storing teaching video and PPT courseware.
Preferably, the signal processing module includes: a first demodulator and a TS stream processing unit;
the first demodulator is used for demodulating the CMMB signal;
the TS stream processing unit is used for carrying out TS stream processing on the demodulated CMMB signal;
and the output end of the radio frequency tuner for receiving CMMB signals of different frequency bands is sequentially connected with the first demodulator and the TS stream processing unit.
Further, the TS stream processing unit includes: the TS transmission signal generation subunit, the up-conversion circuit and the radio frequency power amplifier are connected in sequence;
the TS transmission signal generation subunit is used for generating the demodulated CMMB signal into TS stream, and multiplexing the TS transparent stream and the PSI information table contained in the TS stream to generate a TS transmission signal;
the up-conversion circuit is used for up-converting the TS transmission signal into a radio frequency signal in a UHF frequency band;
the radio frequency power amplifier is used for amplifying the radio frequency signal.
Preferably, the signal receiving module includes: the radio frequency demodulation circuit comprises a receiving antenna for receiving radio frequency signals, a signal processing circuit for processing the radio frequency signals and a second demodulator for demodulating the radio frequency signals;
the output end of the receiving antenna is sequentially connected with the signal processing circuit and the second demodulator;
and the output end of the second demodulator is connected with the mobile intelligent terminal.
Further, the signal processing circuit comprises an RC low-pass filter, a variable gain amplifier and a digital-to-analog converter which are connected in sequence;
the input ends of the RC low-pass filter and the variable gain amplifier are connected with the receiving antenna;
and the output end of the digital-to-analog converter is connected with the input end of the second demodulator.
Preferably, the radio frequency tuner includes: a digital television signal tuning chip;
the baseband demodulator includes: the digital television chip is connected with the digital television signal tuning chip;
the application processor comprises a main control chip ROCKHIPS 2706 connected with a digital television chip TP 3001B.
Preferably, the multimedia processor further includes: a communication manager and an AGC controller;
the communication manager comprises a power module and a signal converter;
the signal converter is provided with an RJ45 interface; the signal converter is connected with the power module through an RJ45 interface;
the power supply module comprises an AC/DC switching circuit and a power supply control unit;
the power supply control unit is bidirectionally connected with the AGC controller.
The beneficial effects of the utility model are embodied in:
the utility model provides a multimedia teaching equipment based on CMMB receiving terminal, which comprises a frequency tuner connected with the output end of CMMB signal, a signal processing module connected with the output end of the radio frequency tuner, a signal receiving module and a multimedia processor which are connected with the signal processing module in sequence; the connection relation is established between the CMMB and each element associated with the CMMB, and great convenience is provided for multimedia teaching work.
The input port of the multimedia processor is connected with the output end of the signal receiving module, and the output port of the multimedia processor is connected with the mobile intelligent terminal. The multimedia processor comprises a display screen and a loudspeaker which are arranged on the surface of the multimedia processor, and also comprises an audio/video decoder which is arranged in the multimedia processor and a memory which is used for storing teaching video and PPT courseware. Effectively makes up the poor constraint of network state, provides technical support for education work, and meets the requirement of learning at any time and any place.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of a multimedia teaching device based on a CMMB receiving terminal;
the system comprises a frequency tuner 1, a signal processing module 2, a signal receiving module 3, a multimedia processor 4 and a mobile intelligent terminal 5.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
The utility model provides a multimedia education equipment based on CMMB, the utility model discloses a very big has made things convenient for towards all kinds of scientific research and teaching training work. As a battery-powered terminal, compared with a mobile network and a wireless network, the application scenario of the CMMB is not limited by bandwidth and network signals, and the use cost is low, so that the CMMB can be widely applied to various environments with unsmooth networks. The method is particularly suitable for the minors which are easily influenced by adverse network environment, and solves the problems that the minors are easily influenced by the adverse network environment, can not be absorbed in learning, and are not good at improving learning by utilizing network resources under the condition of no supervision.
As shown in fig. 1, the digital multimedia broadcasting receiver comprises a frequency tuner (1) connected with an output end of a CMMB signal, a signal processing module (2) connected with an output end of the radio frequency tuner (1), a signal receiving module (3) and a multimedia processor (4) which are sequentially connected with the signal processing module (2);
the input port of the multimedia processor is connected with the output end of the signal receiving module (3), and the output port of the multimedia processor is connected with the mobile intelligent terminal (5);
the multimedia processor (4) comprises a display screen and a loudspeaker which are arranged on the surface of the multimedia processor, and also comprises an audio/video decoder which is arranged in the multimedia processor and a memory which is used for storing teaching video and PPT courseware.
Furthermore, the multimedia processor (4) further comprises: a communication manager and an AGC controller;
the communication manager comprises a power module and a signal converter;
the signal converter is provided with an RJ45 interface; the signal converter is connected with the power module through an RJ45 interface;
the power supply module comprises an AC/DC switching circuit and a power supply control unit;
the power supply control unit is bidirectionally connected with the AGC controller.
The signal processing module (2) comprises: a first demodulator and a TS stream processing unit;
a first demodulator for demodulating the CMMB signal; all 8MHz BPSK/QPSK/16QAM modulation modes are supported;
the TS stream processing unit is used for carrying out TS stream processing on the demodulated CMMB signal;
and the output end of the radio frequency tuner (1) is sequentially connected with the first demodulator and the TS stream processing unit.
The TS stream processing unit includes: the TS transmission signal generation subunit, the up-conversion circuit and the radio frequency power amplifier are connected in sequence;
the TS transmission signal generation subunit is used for generating the demodulated CMMB signal into TS stream, and multiplexing the TS transparent stream and the PSI information table contained in the TS stream to generate a TS transmission signal;
the up-conversion circuit is used for up-converting the TS transmission signal into a radio frequency signal in a UHF frequency band;
and the radio frequency power amplifier is used for amplifying the radio frequency signal.
The signal receiving module (3) comprises: the radio frequency demodulation circuit comprises a receiving antenna for receiving radio frequency signals, a signal processing circuit for processing the radio frequency signals and a second demodulator for demodulating the radio frequency signals; the second demodulator supports all modulation modes of 8MHz BPSK/QPSK/16 QAM;
the output end of the receiving antenna is sequentially connected with the signal processing circuit and the second demodulator;
and the output end of the second demodulator is connected with the mobile intelligent terminal.
The signal processing circuit comprises an RC low-pass filter, a variable gain amplifier and a digital-to-analog converter which are connected in sequence;
the input ends of the RC low-pass filter and the variable gain amplifier are connected with the receiving antenna;
and the output end of the digital-to-analog converter is connected with the input end of the second demodulator.
The radio frequency tuner includes: a digital television signal tuning chip;
the baseband demodulator includes: the digital television chip is connected with the digital television signal tuning chip;
the application processor comprises a main control chip ROKCHIPS 2706 connected with a digital television chip TP 3001B.
The utility model discloses a provide, very big made things convenient for towards all kinds of scientific research and teaching training work. As a battery-powered terminal, compared with a mobile network and a wireless network, the application scenario of the CMMB is not limited by bandwidth and network signals, and the use cost is low, so that the CMMB can be widely applied to various environments with unsmooth networks. The method is particularly suitable for the minors which are easily influenced by adverse network environment, and solves the problems that the minors are easily influenced by the adverse network environment, can not be absorbed in learning, and are not good at improving learning by utilizing network resources under the condition of no supervision.
The method and the device effectively make up for poor constraint of the network state, provide technical support for education work, and meet the requirement of learning of people at any time and any place.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (7)
1. A multimedia teaching device based on a CMMB receiving terminal is characterized by comprising a radio frequency tuner connected with the output end of a CMMB signal, a signal processing module connected with the output end of the radio frequency tuner, a signal receiving module and a multimedia processor which are sequentially connected with the signal processing module;
the input port of the multimedia processor is connected with the output end of the signal receiving module, and the output port of the multimedia processor is connected with the mobile intelligent terminal;
the multimedia processor comprises a display screen and a loudspeaker which are arranged on the surface of the multimedia processor, and also comprises an audio/video decoder which is arranged in the multimedia processor and a memory which is used for storing teaching video and PPT courseware.
2. The CMMB receiving terminal-based multimedia teaching apparatus as claimed in claim 1, wherein said signal processing module comprises: a first demodulator and a TS stream processing unit;
the first demodulator is used for demodulating the CMMB signal;
the TS stream processing unit is used for carrying out TS stream processing on the demodulated CMMB signal;
and the output end of the radio frequency tuner for receiving CMMB signals of different frequency bands is sequentially connected with the first demodulator and the TS stream processing unit.
3. The CMMB receiving terminal-based multimedia teaching apparatus as claimed in claim 2, wherein said TS stream processing unit comprises: the TS transmission signal generation subunit, the up-conversion circuit and the radio frequency power amplifier are connected in sequence;
the TS transmission signal generation subunit is used for generating the demodulated CMMB signal into TS stream, and multiplexing the TS transparent stream and the PSI information table contained in the TS stream to generate a TS transmission signal;
the up-conversion circuit is used for up-converting the TS transmission signal into a radio frequency signal in a UHF frequency band;
the radio frequency power amplifier is used for amplifying the radio frequency signal.
4. The CMMB receiving terminal-based multimedia teaching apparatus as claimed in claim 1, wherein the signal receiving module comprises: the radio frequency demodulation circuit comprises a receiving antenna for receiving radio frequency signals, a signal processing circuit for processing the radio frequency signals and a second demodulator for demodulating the radio frequency signals;
the output end of the receiving antenna is sequentially connected with the signal processing circuit and the second demodulator;
and the output end of the second demodulator is connected with the mobile intelligent terminal.
5. The CMMB receiving terminal-based multimedia teaching apparatus of claim 4, wherein the signal processing circuit comprises an RC low-pass filter, a variable gain amplifier and a digital-to-analog converter connected in sequence;
the input ends of the RC low-pass filter and the variable gain amplifier are connected with the receiving antenna;
and the output end of the digital-to-analog converter is connected with the input end of the second demodulator.
6. The CMMB receiving terminal-based multimedia teaching apparatus as claimed in claim 1, wherein said rf tuner comprises: a baseband demodulator, an application processor and a digital television signal tuning chip;
the baseband demodulator includes: the digital television chip is connected with the digital television signal tuning chip;
the application processor comprises a main control chip ROCKHIPS 2706 connected with a digital television chip TP 3001B.
7. The CMMB receiving terminal-based multimedia teaching apparatus of claim 1, wherein the multimedia processor further comprises: a communication manager and an AGC controller;
the communication manager comprises a power module and a signal converter;
the signal converter is provided with an RJ45 interface; the signal converter is connected with the power module through an RJ45 interface;
the power supply module comprises an AC/DC switching circuit and a power supply control unit;
the power supply control unit is bidirectionally connected with the AGC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922066199.9U CN211656299U (en) | 2019-11-26 | 2019-11-26 | Multimedia teaching equipment based on CMMB receiving terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922066199.9U CN211656299U (en) | 2019-11-26 | 2019-11-26 | Multimedia teaching equipment based on CMMB receiving terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211656299U true CN211656299U (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922066199.9U Expired - Fee Related CN211656299U (en) | 2019-11-26 | 2019-11-26 | Multimedia teaching equipment based on CMMB receiving terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211656299U (en) |
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2019
- 2019-11-26 CN CN201922066199.9U patent/CN211656299U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201009 Termination date: 20211126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |