CN203859841U - Device with Cara OK communication function - Google Patents
Device with Cara OK communication function Download PDFInfo
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- CN203859841U CN203859841U CN201420227990.8U CN201420227990U CN203859841U CN 203859841 U CN203859841 U CN 203859841U CN 201420227990 U CN201420227990 U CN 201420227990U CN 203859841 U CN203859841 U CN 203859841U
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Abstract
The utility model discloses a device with a Cara OK communication function. The device comprises a signal combination module and a signal transmit-receive module; the signal combination module is connected with a microphone transmitting module; the signal transmit-receive module is connected with a TV smart card; the signal combination module generates first frequency waves and second frequency waves; the first frequency waves and the second frequency waves are loaded in a combined manner according to voice data signals, so that microphone signals which carry equipment information of a microphone are generated; the microphone signals are transmitted by the microphone transmitting module, and then, are received by the TV smart card; the signal transmit-receive module performs signal separation on audio signals converted by the TV smart card, so that the audio signals can be reduced to voice data signals which carry the equipment information, and therefore, the TV smart card can distribute communication frequencies of the microphone according to the equipment information, and information interaction between the microphone and a TV can be realized; the signal transmit-receive module converts ACK signals outputted by the TV smart card into preset frequencies and transmits the preset frequencies to the microphone, and therefore, automatic pairing of the microphone and the TV smart can be realized, and the use of a user can be facilitated.
Description
Technical field
The utility model relates to karaoke television technical field, particularly a kind of device with Karaoke communication function.
Background technology
Along with the fast development of intelligent electronic device industry, the smart machines such as smart mobile phone, intelligent appliance have improved people's living standard gradually.Along with the continuous increase of smart machine use amount, driven the development of smart machine periphery produce market simultaneously.Individual has being on the increase of smart machine quantity, and the problem of the upgrading of smart machine day by day highlights, and user, in the situation that smart machine does not damage, can not upgrade immediately following market rhythm the smart machine of oneself.The higher intelligent artifact of this product price of intelligent TV set particularly, the frequency that user upgrades can be lower.
For this situation, a kind of modularization TV is proposed at present, intelligent system is separated with television display system, the intelligent system of only upgrading.Adopt user in this way and only need pay very cheap price (for upgrading or renewal intelligent system), just can make out-of-date intelligent television upgrade to the up-to-date version in market; It not only provides better Product Experience for user, and Hai Wei equipment vendors provide another kind of profit channel, makes intelligent artifact have more the market competitiveness.When intelligent system is upgraded, manufacturer also can release the smart card with specific function, to enrich intelligent television product line.
At present, have in the smart card of specific function, the smart card with Kara OK function is application scenarios or user's acceptance no matter, is all rank prostatitis.At modularization TV product---in the R&D process of Karaoke smart card, smart card is arranged in television set conventionally, two or three wireless microphones of one general configuration.The smart card that microphone collection user's voice signal radios in intelligent television carries out corresponding speech processes, is play afterwards by loudspeaker.The structure of existing microphone transmitter module and TV smart card and annexation as shown in Figure 1, the voice signal MIC_in of microphone collection successively by signal transmission unit modulate, MCU is transmitted to television set after being converted to and being modulated into wireless audio signal MIC_out after speech data signal, by wireless transmitting unit.The TV smart card of television set is controlled for realizing the basic function of intelligent TV set, as the decoding of RF radiofrequency signal, audio/video decoding, and system control signal output, user and peripheral data are mutual etc.In TV smart card, wireless audio signal MIC_out is transferred to TV CPU after being received by wireless receiving module, by loudspeaker is play after entering relevant treatment by TV CPU, power amplifier.
But, in existing smart card, only having a wireless receiving module, it cannot mate two microphones simultaneously.If use two microphones that two wireless receiving modules need to be set, and the receive frequency of these two wireless receiving modules needs user manually to adjust simultaneously, until with corresponding microphone successful matching after just can use.This manual adjusting style needed decorrelation electronics knowledge, for domestic consumer, be difficult to grasp and operation inconvenience, greatly reduce the intellectuality of intelligent television, also increased the cost of intelligent television simultaneously.
Thereby prior art need to improve.
Utility model content
In view of above-mentioned the deficiencies in the prior art part, the purpose of this utility model is to provide a kind of device with Karaoke communication function, to solve existing smart card, needs manually adjustment receive frequency to carry out matched microphones, makes user be difficult to grasp and unhandy problem.
In order to achieve the above object, the utility model has been taked following technical scheme:
A device with Karaoke communication function, is connected with TV smart card with microphone transmitter module, and described microphone transmitter module is arranged in microphone, and described TV smart card is arranged in the television set with Kara OK function, and it comprises:
For generation of first frequency ripple and second frequency ripple, according to the speech data signal of microphone transmitter module output, first frequency ripple and second frequency ripple are loaded to combination, generate Mike's signal of the facility information that has carried microphone to the signal combination module of microphone transmitter module modulate emission;
For receiving TV smart card according to the audio signal of described Mike's signal conversion, it is the speech data signal that carries described facility information that audio signal is carried out to signal separating reducing, and described speech data signal is fed back to TV smart card; And the TV signal that the ack signal of TV smart card output is converted to predeterminated frequency, the signal transmitting and receiving module by described TV signal feedback to TV smart card;
Described signal combination module is connected with microphone transmitter module; Described signal transmitting and receiving module is connected with TV smart card.
In the described device with Karaoke communication function, described signal combination module comprises: first frequency wave producer, second frequency wave producer, the first gating switch, the second gating switch, the first inverter and first adder; Described first frequency wave producer connects the first input end of first adder by the first gating switch, second frequency wave producer connects the second input of first adder by the second gating switch, the control end of the first gating switch connects the input of the first inverter, and the control end of the second gating switch connects the output of the first inverter.
In the described device with Karaoke communication function, described first frequency wave producer is that frequency is the sine-wave generator of 20KHz, and second frequency wave producer is that frequency is the sine-wave generator of 2KHz.
In the described device with Karaoke communication function, described signal transmitting and receiving module comprises:
For receiving TV smart card according to the audio signal of described Mike's signal conversion, by audio signal separating reducing be carry microphone facility information speech data signal and feed back to the signal receiving unit of TV smart card;
For the ack signal of TV smart card output is converted to the TV signal of predeterminated frequency and feeds back to the signal transmitter unit that TV smart card is launched;
Described signal receiving unit, signal transmitter unit connect respectively TV smart card.
In the described device with Karaoke communication function, described signal receiving unit comprises the first band pass filter, the second band pass filter, the first rectification circuit, the second rectification circuit, the first filter, the second filter and sample circuit; Described the first band pass filter, the first rectification circuit, the first filter connect successively, described the second band pass filter, the second rectification circuit, the second filter connect successively, the first filter connects the first input end of sample circuit, and the second filter connects the second input of sample circuit.
In the described device with Karaoke communication function, described the first band pass filter is that frequency is the band pass filter of 2KHz, and the second band pass filter is that frequency is the band pass filter of 20KHz.
In the described device with Karaoke communication function, described signal transmitter unit comprises the 3rd frequency wave generator, the 4th frequency wave generator, the second inverter, the 3rd gating switch, the 4th gating switch and second adder; Described the 3rd frequency wave generator connects the first input end of second adder by the 3rd gating switch, the 4th frequency wave generator connects the second input of second adder by the 4th gating switch, the control end of the 3rd gating switch connects the output of the second inverter, and the control end of the 4th gating switch connects the input of the second inverter.
In the described device with Karaoke communication function, described the 3rd frequency wave generator is that frequency is the sine-wave generator of 15KHz, and the 4th frequency wave generator is that frequency is the sine-wave generator of 10KHz.
Compared to prior art, the device with Karaoke communication function that the utility model provides, by signal combination module, produce first frequency ripple and second frequency ripple, according to the speech data signal of microphone transmitter module output by first frequency ripple and second frequency ripple loads combination, generation carried Mike's signal of the facility information of microphone, by being received by the TV smart card of television set after microphone transmitter module modulate emission; It is the speech data signal that carries described facility information that signal transmitting and receiving module is carried out signal separating reducing to the audio signal of TV smart card conversion, make TV smart card according to facility information, distribute the wireless communication frequency of microphone, realize the information interaction between microphone and television set; Signal transmitting and receiving module also converts the ack signal of TV smart card output to predeterminated frequency and is transmitted to microphone, is not increasing on the basis of holding wire, realizes automatic matching microphone, is user-friendly to.
Accompanying drawing explanation
Fig. 1 is the structural representation of microphone and smart card in prior art.
The structured flowchart of Application Example of the device with Karaoke communication function that Fig. 2 provides for the utility model.
The structure chart of signal combination module in the device with Karaoke communication function that Fig. 3 provides for the utility model embodiment.
The structure chart of signal receiving unit in the device with Karaoke communication function that Fig. 4 provides for the utility model embodiment.
The structure chart of signal transmitter unit in the device with Karaoke communication function that Fig. 5 provides for the utility model embodiment.
Embodiment
The utility model provides a kind of device with Karaoke communication function, for making the purpose of this utility model, technical scheme and effect clearer, clear and definite, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The device with Karaoke communication function that the present embodiment provides, is mainly used in and has in the television set of Kara OK function and the microphone of configuration.Refer to Fig. 1, described in there is Karaoke communication function device comprise be arranged in microphone, with the signal combination module 100 of microphone transmitter module 1 collaborative work; And be arranged in television set, with the signal transmitting and receiving module 200 of TV smart card 2 collaborative works.Described microphone transmitter module 1 comprises signal transmission unit 11, MCU and wireless transmitting unit 12.Described TV smart card 2 comprises wireless receiving module 21, TV CPU, power amplifier 22 and loudspeaker 23.Signal transmitting and receiving module 200 comprises signal receiving unit 201 and signal transmitter unit 202.Described signal transmission unit 11, MCU, signal combination module 100 connect successively, and described signal combination module 100 connects wireless transmitting unit 12.Described wireless receiving module 21 connects TV CPU and signal receiving unit 201, and TV CPU connects signal receiving unit 201 and signal transmitter unit 202, and signal transmitter unit 202 connects loudspeaker 23 by power amplifier 22.
In the present embodiment, in microphone, increased the facility information (being working frequency points) that signal combination module 100 loads microphone.Accordingly, in television set, increase the facility information that signal transmitting and receiving module 200 is extracted microphone, be convenient to television set and carry out frequency Auto-matching.And the voice signal that signal transmitting and receiving module 200 can also generate corresponding predeterminated frequency is transmitted to microphone, make microphone transmitter module 1 can reconfigure the mode of operation of wireless transmitting unit 12, adjust working frequency points; Thereby realize the communication interaction between microphone and television set, automatic matching, the frequency that shares out the work, greatly facilitate user and use.
Please again consult Fig. 1, the present embodiment be take microphone as wireless microphone, television set is that intelligent TV set is example, described in there are the Karaoke device of communication function and microphone transmitter module 1,2 collaborative works of TV smart card principle be:
In microphone transmitter module 1, signal transmission unit 11 is converted to speech data signal by transferring to after the voice signal MIC_IN modulation of microphone collection in MCU.Signal combination module 100 can produce first frequency ripple and second frequency ripple automatically, according to described speech data signal, first frequency ripple and second frequency ripple is loaded to combination producing Mike signal, is modulated into wireless audio signal MIC_OUT launches by wireless transmitting unit 12.
In the TV smart card 2 of television set, wireless receiving module 21 receives wireless audio signal MIC_OUT, wireless audio signal MIC_OUT is reduced, then carry out high frequency to the modulation of low frequency, the final audio signal Audio that generates the low frequency of simulation exports to TV CPU and signal receiving unit 201.In described audio signal Audio, carry the facility information (as working frequency points) of microphone, realized frequency match for the later stage.201 couples of described audio signal Audio of signal receiving unit carry out signal separation, the facility information of microphone is separated from audio signal Audio, that is to say, audio signal Audio is the speech data signal that has carried the facility information of microphone through signal receiving unit 201 separating reducings, and this speech data signal is transferred to TV CPU.TV CPU to the facility information in speech data signal (as the ID of microphone, the ID of each microphone is different, the communication frequency that different microphones need to mate) analyzing rear is microphone allocate communications frequency, unpaired message, complete the facility registration of wireless microphone in intelligent TV set, realized information interaction; And interactive information is formed to ack signal be transferred to signal transmitter unit 202.Signal transmitter unit 202 converts described ack signal to the TV signal of predeterminated frequency, to realize the modulated process before transmitting.This TV signal is transferred to after power amplifier 22 amplifications, by loudspeaker 23 sounding, the signal of sounding.The frequency of this voice signal is identical with the frequency of TV signal.
The voice signal MIC_IN that microphone gathers like this, after above-mentioned processing, is finally sent the voice signal of corresponding predeterminated frequency by intelligent TV set.The voice signal of this predeterminated frequency is gathered by microphone again, by signal transmission unit 11 receptions, be reduced to data-signal and be transferred to MCU, MCU identifies according to predeterminated frequency communication frequency and the pairing signal that intelligent TV set distributes, so that the working frequency points of wireless transmitting unit 12 to be set, thereby realized the automatic matching between wireless microphone and intelligent TV set, automatically frequently fixed, the function being certainly dynamically connected.
Should be understood that, signal transmission unit 11, MCU and wireless transmitting unit 12 in the microphone transmitter module 1 of mentioning in the present embodiment, and the function that in TV smart card 2, wireless receiving module 21, TV CPU, power amplifier 22 and loudspeaker 23 are realized is prior art, the present embodiment has only been applied the correlation function of microphone transmitter module 1 and TV smart card 2, with the device collaborative work with Karaoke communication function.Between wireless microphone and intelligent TV set, can realize working frequency points pairing, be connected, data communication is mainly to generate first frequency ripples and second frequency ripple carrys out loading equipemtn information by signal combination module 100 alternately; In signal transmitting and receiving module 200, by signal receiving unit 201 separation equipment information, signal transmitter unit 202 generates predeterminated frequencies and feeds back to that microphone realizes.
Please refer to Fig. 2, described signal combination module 100 comprises first frequency wave producer 101, second frequency wave producer 102, the first gating switch 103, the second gating switch 104, the first inverter 105 and first adder 106.Described first frequency wave producer 101 connects the first input end ina of first adder 106 by the first gating switch 103, second frequency wave producer 102 connects the second input inb of first adder 106 by the second gating switch 104, the control end ct1 of the first gating switch 103 connects the input in of the first inverter 105, and the control end ct2 of the second gating switch 104 connects the output out of the first inverter 105.
Wherein, the sine-wave generator that described first frequency wave producer 101 is 20KHz for frequency, the sine wave that the first frequency ripple of its generation is 20KHz.The sine-wave generator that second frequency wave producer 102 is 2KHz for frequency, the sine wave that the second frequency ripple of its generation is 2KHz.20KHz and 2KHz are the better combination of frequency of microphone transmitting, can reduce packet loss, guarantee signal stabilization, transmitting completely.
Described the first gating switch 103 and the second gating switch 104 are low frequency gating switch, the speech data signal of MCU conversion output is controlled the switching gate (high level conducting, low level disconnect) of the first gating switch 103, and speech data signal is controlled the switching gate of the second gating switch 104 after the first inverter 105 is anti-phase.
When speech data signal is high level (binary form is shown 1), the first gating switch 103 conductings, the 20KHz sine wave transmissions of first frequency wave producer 101 outputs is to the first input end ina of first adder 106.Now, speech data signal output low level after the first inverter 105 is controlled the second gating switch 104 and is disconnected, and the 2KHz sine wave that second frequency wave producer 102 produces cannot be exported.In like manner known, when speech data signal is low level (binary form is shown 0), the first gating switch 103 disconnects, the second gating switch 104 conductings; The 20KHz sine wave that first frequency wave producer 101 produces cannot be exported, and the 2KHz sine wave transmissions that second frequency wave producer 102 produces is to the second input inb of first adder 106.
Along with the continuous change of speech data signal low and high level, through first adder 106, carry out addition combination, form one group of primary sinusoid sequence being formed by 20KHz, 2KHz sine wave, be Mike's signal.This sine wave sequence transmission is loaded on high frequency carrier after modulating to wireless transmitting unit 12, forming wireless audio signal MIC_OUT is transmitted in space medium, by the wireless receiving module 21 of TV smart card 2, received, finally by signal receiving unit 201, isolated the facility information of microphone, complete the information interaction of microphone and television set.
See also Fig. 3, described signal receiving unit 201 comprises the first band pass filter 2011, the second band pass filter 2012, the first rectification circuit 2013, the second rectification circuit 2014, the first filter 2015, the second filter 2016 and sample circuit 2017; Described the first band pass filter 2011, the first rectification circuit 2013, the first filter 2015 connect successively, described the second band pass filter 2012, the second rectification circuit 2014, the second filter 2016 connect successively, the first filter 2015 connects the first input end in1 of sample circuit 2017, and the second filter 2016 connects the second input in2 of sample circuit 2017.
Wherein, the band pass filter that described the first band pass filter 2011 is 2KHz for frequency, the sine wave that can be 2KHz by frequency leaches.The band pass filter that the second band pass filter 2012 is 20KHz for frequency, the sine wave that can be 20KHz by frequency leaches.The first filter 2015 and the second filter 2016 are low pass filter.
Wireless receiving module 21 reduces the wireless audio signal MIC_OUT of microphone transmitting, modulation, and the final audio signal Audio that generates the low frequency of simulation, by the sinusoidal wave sinusoidal wave sequence forming of 20KHz, 2KHz.This sine wave sequence is by 20KHz, the 2KHz band pass filter of signal receiving unit 201,20KHz, 2KHz sine wave signal are separated respectively from sinusoidal wave sequence, isolated 20KHz, 2KHz sine wave signal pass through respectively corresponding rectification circuit shaping, after low pass filter filtering interference signals, be transferred to respectively sample circuit 2017, after over-sampling circuit 2017 sampling analyses, be finally reduced to the speech data signal of the facility information that has carried microphone, and be transferred to TV CPU.
TV CPU resolves the facility information of microphone, according to facility information (as the ID of microphone), distributes wireless communication frequency to corresponding microphone, realizes information interaction.TV CPU forms ack signal by interactive information and is transferred to signal transmitter unit 202.
Described signal transmitter unit 202 comprises the 3rd frequency wave generator 2021, the 4th frequency wave generator 2022, the second inverter 2023, the 3rd gating switch 2024, the 4th gating switch 2025 and second adder 2026; Described the 3rd frequency wave generator 2021 connects the first input end in61 of second adder 2026 by the 3rd gating switch 2024, the 4th frequency wave generator 2022 connects the second input in62 of second adder 2026 by the 4th gating switch 2025, the control end ct41 of the 3rd gating switch 2024 connects the output out31 of the second inverter 2023, and the control end ct52 of the 4th gating switch 2025 connects the input in31 of the second inverter 2023.
Wherein, the sine-wave generator that described the 3rd frequency wave generator 2021 is 15KHz for frequency, the sine wave that the 3rd frequency wave of generation is 15KHz.The sine-wave generator that the 4th frequency wave generator 2022 is 10KHz for frequency, the sine wave that the 4th frequency wave of generation is 10KHz.Described the 3rd gating switch 2024 and the 4th gating switch 2025 are low frequency gating switch, during its control end input high level gating switch disconnect, conducting during low level.
When ack signal is high level (binary form is shown 1), the 4th gating switch 2025 disconnects, and this high level is controlled the 3rd gating switch 2024 conductings by the second inverter 2023 output low levels, now only exports 15KHz sine wave.Otherwise, when ack signal is low level (binary form is shown 0), the 4th gating switch 2025 conductings, the 3rd gating switch 2024 disconnects, and only exports 10KHz sine wave.It is one group of the second sinusoidal wave sequence being comprised of 15KHz, 10KHz sine wave signal, i.e. TV signal that second adder 2026 loads the sine wave of two gating switch outputs.This organizes the power amplifier 22 that the second sinusoidal wave sequence sends in TV smart card 2 and carries out power amplification, finally promotes loudspeaker 23 sounding.
The frequency of the voice signal that television set sends (15KHz, 10KHz combination) is different from the frequency receiving (20KHz, 2KHz combination), microphone receives after the voice signal that television set sends, by signal transmission unit 11, parse digital signal, and send MCU to, MCU can organize data-signal according to this, reconfigure the mode of operation of the wireless transmitting unit 12 of microphone, adjust working frequency points, thereby realize the automatic matching of microphone and television set, automatically the share out the work function of frequency, is user-friendly to.
In sum, the utility model provides has the device of Karaoke communication function, utilizes the data channel of existing wireless microphone, by the sound horn of television set, the mode that microphone receives sound; In microphone, increase signal combination module and generate characteristic frequency, be Mike's signal that 20KHz, 2KHz are combined into, be modulated into wireless audio signal and be transmitted to television set; Television set is isolated the facility information of microphone to it, distributes the wireless communication frequency of microphone according to facility information, realizes the information interaction between microphone and television set; Television set forms ack signal to interactive information and converts predeterminated frequency to, is the TV signal that 15KHz, 10KHz are combined into, after power amplification by the loudspeaker signal of sounding; Microphone parses digital signal after receiving voice signal, according to the mode of operation of the wireless transmitting unit of digital signal configuration microphone, adjust working frequency points, thereby realize microphone Lookup protocol communication frequency, while having a plurality of microphone access television set, can automatically complete connection, automatic matching, convenient for users.
Be understandable that; for those of ordinary skills; can be equal to and replace or change according to the design of the technical solution of the utility model and utility model thereof, and all these changes or for all belonging to the protection range of the appended claim of the utility model.
Claims (8)
1. a device with Karaoke communication function, is connected with TV smart card with microphone transmitter module, and described microphone transmitter module is arranged in microphone, and described TV smart card is arranged in the television set with Kara OK function, it is characterized in that, comprising:
For generation of first frequency ripple and second frequency ripple, according to the speech data signal of microphone transmitter module output, first frequency ripple and second frequency ripple are loaded to combination, generate Mike's signal of the facility information that has carried microphone to the signal combination module of microphone transmitter module modulate emission;
For receiving TV smart card according to the audio signal of described Mike's signal conversion, it is the speech data signal that carries described facility information that audio signal is carried out to signal separating reducing, and described speech data signal is fed back to TV smart card; And the TV signal that the ack signal of TV smart card output is converted to predeterminated frequency, the signal transmitting and receiving module by described TV signal feedback to TV smart card;
Described signal combination module is connected with microphone transmitter module; Described signal transmitting and receiving module is connected with TV smart card.
According to claim 1 have Karaoke communication function device, it is characterized in that, described signal combination module comprises: first frequency wave producer, second frequency wave producer, the first gating switch, the second gating switch, the first inverter and first adder; Described first frequency wave producer connects the first input end of first adder by the first gating switch, second frequency wave producer connects the second input of first adder by the second gating switch, the control end of the first gating switch connects the input of the first inverter, and the control end of the second gating switch connects the output of the first inverter.
3. the device with Karaoke communication function according to claim 2, is characterized in that, described first frequency wave producer is that frequency is the sine-wave generator of 20KHz, and second frequency wave producer is that frequency is the sine-wave generator of 2KHz.
4. the device with Karaoke communication function according to claim 1, is characterized in that, described signal transmitting and receiving module comprises:
For receiving TV smart card according to the audio signal of described Mike's signal conversion, by audio signal separating reducing be carry microphone facility information speech data signal and feed back to the signal receiving unit of TV smart card;
For the ack signal of TV smart card output is converted to the TV signal of predeterminated frequency and feeds back to the signal transmitter unit that TV smart card is launched;
Described signal receiving unit, signal transmitter unit connect respectively TV smart card.
According to claim 4 have Karaoke communication function device, it is characterized in that, described signal receiving unit comprises the first band pass filter, the second band pass filter, the first rectification circuit, the second rectification circuit, the first filter, the second filter and sample circuit; Described the first band pass filter, the first rectification circuit, the first filter connect successively, described the second band pass filter, the second rectification circuit, the second filter connect successively, the first filter connects the first input end of sample circuit, and the second filter connects the second input of sample circuit.
6. the device with Karaoke communication function according to claim 5, is characterized in that, described the first band pass filter is that frequency is the band pass filter of 2KHz, and the second band pass filter is that frequency is the band pass filter of 20KHz.
According to claim 4 have Karaoke communication function device, it is characterized in that, described signal transmitter unit comprises the 3rd frequency wave generator, the 4th frequency wave generator, the second inverter, the 3rd gating switch, the 4th gating switch and second adder; Described the 3rd frequency wave generator connects the first input end of second adder by the 3rd gating switch, the 4th frequency wave generator connects the second input of second adder by the 4th gating switch, the control end of the 3rd gating switch connects the output of the second inverter, and the control end of the 4th gating switch connects the input of the second inverter.
8. the device with Karaoke communication function according to claim 7, is characterized in that, described the 3rd frequency wave generator is that frequency is the sine-wave generator of 15KHz, and the 4th frequency wave generator is that frequency is the sine-wave generator of 10KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420227990.8U CN203859841U (en) | 2014-05-06 | 2014-05-06 | Device with Cara OK communication function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420227990.8U CN203859841U (en) | 2014-05-06 | 2014-05-06 | Device with Cara OK communication function |
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| CN203859841U true CN203859841U (en) | 2014-10-01 |
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| CN201420227990.8U Expired - Fee Related CN203859841U (en) | 2014-05-06 | 2014-05-06 | Device with Cara OK communication function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104778866A (en) * | 2015-03-20 | 2015-07-15 | 四川长虹电器股份有限公司 | Teaching system based on television |
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2014
- 2014-05-06 CN CN201420227990.8U patent/CN203859841U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104778866A (en) * | 2015-03-20 | 2015-07-15 | 四川长虹电器股份有限公司 | Teaching system based on television |
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