CN114025269A - Wireless microphone and wireless receiver - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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- H04R2420/07—Applications of wireless loudspeakers or wireless microphones
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Abstract
The application provides a wireless microphone and wireless receiver, the microphone includes: a sound pickup; a transmitting chip, an antenna; the chip includes: the system comprises a first processor, a wireless transmitting unit and an acoustic wave demodulation module; the sound wave demodulation module is connected with the sound pickup; the first processor is connected with the sound wave demodulation module; the wireless transmitting unit is respectively connected with the sound pickup and the wireless receiver; the sound pick-up is used for receiving audio signals and sound wave modulation signals; the sound wave demodulation module is used for analyzing channel information from the sound wave modulation signal; the channel information is the information of available idle channels sent by the wireless receiver; the first processor is used for adjusting the transmitting frequency of the wireless transmitting unit according to the channel information; the first processor is also used for generating response information according to the channel information, and the response information is confirmation information about the channel information sent by the wireless microphone to the wireless receiver; the wireless transmitting unit is used for generating a radio frequency signal according to the audio signal and/or the response information; the antenna is used for radiating radio frequency signals into the air.
Description
Technical Field
The application relates to the technical field of wireless communication, in particular to a wireless microphone and a wireless receiver.
Background
The wireless microphone (or wireless microphone) is widely applied to the occasions such as stage performances, KTVs, teaching, square dances and the like.
One commonly used wireless microphone frequency alignment mode is infrared frequency alignment. The wireless microphone is provided with an infrared receiving module, and the wireless microphone receiver is provided with an infrared transmitting module. When the frequency is matched, a channel is selected at the wireless microphone receiver, then the infrared transmitting module transmits the channel information to the infrared receiving module on the handheld microphone, and the handheld microphone transfers to the set channel according to the channel information to complete frequency matching.
The infrared module has larger dependence on the use environment, needs the infrared receiving module and the infrared transmitting module to be placed face to face within +/-30 degrees, has specific requirements on the holding direction of the wireless microphone, has limited use range and poor user experience, and cannot automatically correct the frequency.
Disclosure of Invention
An object of the embodiment of this application is to provide a wireless microphone and wireless receiver, wireless microphone can independently accomplish with wireless receiver to frequency, does not have the requirement to the angle of placing of wireless microphone.
In a first aspect, an embodiment of the present application provides a wireless microphone, including:
a sound pickup; a transmitting chip, an antenna;
the transmitting chip includes: the system comprises a first processor, a wireless transmitting unit and an acoustic wave demodulation module;
the sound wave demodulation module is connected with the sound pickup;
the first processor is connected with the sound wave demodulation module;
the wireless transmitting unit is respectively connected with the sound pickup and the wireless receiver;
the sound pick-up is used for receiving audio signals and sound wave modulation signals;
the sound wave demodulation module is used for analyzing channel information from the sound wave modulation signal;
the channel information is information of available idle channels sent by the wireless receiver;
the first processor is used for adjusting the transmitting frequency of the wireless transmitting unit according to the channel information;
the first processor is further configured to generate response information according to the channel information, where the response information is acknowledgement information about the channel information sent by the wireless microphone to the wireless receiver;
the wireless transmitting unit is used for generating a radio frequency signal according to the audio signal and/or the response information;
the antenna is used for radiating the radio frequency signal into the air.
In the implementation process, the wireless microphone analyzes channel information from the sound wave modulation signal received by the sound wave demodulation module, wherein the channel information is available idle channel information sent by the wireless receiver. In addition, the first processor generates corresponding response information according to the channel information and transmits the response information to the wireless receiver. Based on the mode, automatic frequency matching between the wireless microphone and the wireless receiver can be realized.
Further, the transmitting chip includes: an audio frequency preprocessing module;
the audio frequency preprocessing module is connected with the sound pickup and the wireless transmitting unit;
the audio pre-processing module is used for carrying out low-pass filtering, pre-emphasis and dynamic range compression processing on the audio signal.
In the implementation process, the audio signal after the preprocessing is convenient for the wireless receiver to analyze the audio signal from the signal sent by the wireless microphone.
Further, the transmitting chip includes: a binary phase shift keying modulation module;
the binary phase shift keying modulation module is connected with the first processor and the wireless transmitting unit;
the binary phase shift keying modulation module is used for modulating the response information to generate a response signal;
the wireless transmitting unit is used for generating the radio frequency signal according to the audio signal and/or the response signal.
In the implementation process, the binary phase shift keying modulation module modulates the response information to generate a response signal, and the wireless transmitting unit finally generates a radio frequency signal according to the audio signal and/or the response signal.
Further, the wireless transmitting unit further includes: the first sound mixing module and the phase-locking frequency modulation module;
the first audio mixing module is connected with the audio preprocessing module;
the phase-locking frequency modulation module is respectively connected with the first sound mixing module and the first processor;
the antenna is connected with the phase-locked frequency modulation module;
the first audio mixing module is used for obtaining a first composite signal according to the audio signal and the response signal;
the first processor is further configured to control a radio frequency of the phase-locked frequency modulation module according to the channel information;
the phase-locked frequency modulation module generates the radio frequency signal according to the first composite signal.
In the implementation process, the first audio mixing module mixes the preprocessed audio signal and the response information to obtain a first composite signal; and the phase-locked frequency modulation module generates a radio frequency signal with a frequency corresponding to the channel information according to the first composite signal.
Based on the above embodiment, the wireless receiver can be enabled to receive the radio frequency signal of the frequency corresponding to the channel information.
Further, the wireless transmitting unit comprises a radio frequency power amplifier module;
the radio frequency power amplifier module is respectively connected with the phase-locked frequency modulation module and the antenna;
the radio frequency power amplifier module is used for amplifying the radio frequency signal.
In a second aspect, the present application provides a wireless receiver comprising: a receiving chip and a loudspeaker;
the receiving chip includes: the second processor, the receiving unit, the sound wave modulation module and the power amplification unit;
the second processor is connected with the receiving unit;
the power amplification unit is connected with the receiving unit;
the second processor is used for searching an idle channel and generating the channel information according to the idle channel;
the receiving unit is configured to receive a radio frequency signal transmitted by the wireless microphone according to the channel information, and convert the radio frequency signal into a first composite signal;
the sound wave modulation module is used for modulating the channel information to obtain a sound wave modulation signal;
the second processor is further configured to receive response information in the first composite signal, where the response information is acknowledgement information about the channel information sent by the wireless microphone;
the power amplification unit is used for analyzing an audio signal from the first composite signal, driving the loudspeaker to play the audio signal and/or the sound wave modulation signal, and enabling the wireless microphone to receive the audio signal and/or the sound wave modulation signal.
In the implementation process, the second processor is used for searching for an idle channel, generating channel information according to the idle channel, generating a sound wave modulation signal by the sound wave modulation module according to the channel information, and driving the loudspeaker to play the sound wave modulation signal by the power amplification unit to enable the wireless microphone to receive the sound wave modulation signal and then cooperate with equipment in the wireless microphone to enable the wireless receiver and the wireless microphone to complete automatic frequency alignment.
Further, the receiving chip includes:
an audio post-processing module;
the audio post-processing module is respectively connected with the receiving unit and the power amplification unit;
the audio post-processing module is used for carrying out low-pass filtering, de-emphasis and dynamic range expansion on the first composite signal to obtain the audio signal.
In the implementation process, the audio post-processing module performs low-pass filtering, de-emphasis and dynamic range extension on the first composite signal to obtain the audio signal, namely the audio signal received by the sound pick-up of the wireless microphone. Based on the above embodiments, the audio signal can be analyzed in the first signal.
Further, the receiving chip further includes:
a binary phase shift keying demodulation module;
the binary phase shift keying demodulation module is respectively connected with the receiving unit and the second processor;
the binary phase shift keying demodulation module is used for analyzing the response information from the first composite signal.
In the implementation process, the binary phase shift keying demodulation module rapidly analyzes the response information in the first composite signal.
Further, the receiving unit comprises a radio frequency front end and a frequency modulation demodulation module;
the radio frequency front end is connected with the frequency modulation demodulation module;
the second processor is respectively connected with the radio frequency front end and the frequency modulation demodulation module;
the radio frequency front end is used for receiving the radio frequency signal according to the channel information and converting the radio frequency signal into an intermediate frequency signal;
the frequency modulation demodulation module is used for converting the intermediate frequency signal into a first composite signal.
In the implementation process, the wireless microphone finally sends a radio frequency signal through the antenna, the radio frequency front end receives the radio frequency signal according to the channel information and converts the radio frequency signal into an intermediate frequency signal, and the frequency modulation demodulation module is used for converting the intermediate frequency signal into the first composite signal.
Further, the receiving chip includes: a cue tone generator;
the power amplifier unit includes: the second sound mixing module, the power amplification module and the digital-to-analog converter;
the second sound mixing module is connected with the cue tone generator, the receiving unit, the frequency modulation and demodulation module, the sound wave modulation module and the digital-to-analog converter;
the power amplification module is connected with the digital-to-analog converter;
the second processor is also used for controlling the cue tone generator to generate cue tone signals;
the second sound mixing module generates a second composite signal according to the audio signal, the sound wave modulation signal and the cue sound signal;
the power amplifier module is used for driving the loudspeaker to play the second composite signal.
In the implementation process, the second sound mixing module mixes the cue sound signal, the sound wave modulation signal and the signal output by the audio post-processing module, and the power amplification unit drives the loudspeaker to play the mixed second composite signal.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a wireless microphone according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a wireless receiver according to an embodiment of the present application.
Icon: 11-a sound pick-up; 12-an emitting chip; 13-an antenna; 121-a first processor; 122-a wireless transmitting unit; 123-acoustic wave demodulation module; 124-audio frequency preprocessing module; 125-binary phase shift keying modulation module; 126-analog-to-digital converter; 1221-a first mixing module; 1222-phase-locked fm modulation module; 1223-a radio frequency power amplifier module; 21-a loudspeaker; 22-a receiving chip; 221-a second processor; 222-a receiving unit; 223-a power amplifier unit; 224-binary phase shift keying demodulation module; 225-cue tone generator; 226-an acoustic wave modulation module; 227-an audio post-processing module; 2221-radio frequency front end; 2222-frequency modulation demodulation module; 2231-a second mixing module; 2232-power amplifier module; 2233 digital-to-analog converter.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Example 1
Referring to fig. 1, an embodiment of the present application provides a wireless microphone, including;
a sound pickup 11; a transmitting chip 12, an antenna 13;
the transmitting chip 12 includes: a first processor 121, a wireless transmitting unit 122, and an acoustic wave demodulation module 123;
the sound wave demodulation module 123 is connected with the sound pickup 11;
the first processor 121 is connected with the acoustic wave demodulation module 123;
the wireless transmitting unit 122 is respectively connected with the sound pickup 11 and the wireless receiver;
the sound pick-up 11 is used for receiving audio signals and sound wave modulation signals;
the sound wave demodulation module 123 is configured to analyze channel information from the sound wave modulation signal;
the channel information is information of available idle channels sent by the wireless receiver;
the first processor 121 is configured to adjust a transmission frequency of the wireless transmission unit 122 according to the channel information;
the first processor 121 is further configured to generate response information according to the channel information, where the response information is acknowledgement information about the channel information sent by the wireless microphone to the wireless receiver;
the wireless transmitting unit 122 is configured to generate a radio frequency signal according to the audio signal and/or the response information;
the antenna 13 is used for radiating the radio frequency signal into the air.
In the above embodiment, the wireless microphone analyzes the channel information from the audio signal received by the sound wave demodulation module 123, where the channel information is available idle channel information sent by the wireless receiver, and compared with the prior art, the wireless microphone does not need to preset the transmission frequency, but the first processor 121 adjusts the transmission frequency of the transmitting unit according to the channel information. In addition, the first processor 121 generates corresponding response information according to the channel information. Based on the mode, automatic frequency matching between the wireless microphone and the wireless receiver can be realized.
In a possible embodiment, the transmitting chip 12 comprises: an audio preprocessing module 124;
the audio preprocessing module 124 is connected with the sound pickup 11 and the wireless transmitting unit 122;
the audio pre-processing module 124 is configured to perform low-pass filtering, pre-emphasis, and dynamic range compression on the audio signal.
In the implementation process, the audio signal after the preprocessing is convenient for the wireless receiver to analyze the audio signal from the signal sent by the wireless microphone.
In a possible embodiment, the transmitting chip 12 comprises: a binary phase shift keying modulation module 125;
the binary phase shift keying modulation module 125 is connected with the first processor 121 and the wireless transmission unit;
the binary phase shift keying modulation module 125 is configured to modulate the response information to generate a response signal;
the wireless transmitting unit 122 is configured to generate the radio frequency signal according to the audio signal and/or the response signal.
In the implementation process, the response information is modulated, so that the wireless receiver can analyze the response information in the radio frequency signal.
In a possible implementation, the wireless transmitting unit 122 further includes: a first mixing module 1221, a phase-locked fm modulation module 1222;
the first mixing module 1221 is connected to the audio preprocessing module 124;
the phase-locked fm modulation module 1222 is respectively connected to the first mixing module 1221 and the first processor 121;
the antenna 13 is connected with the phase-locked fm modulation module 1222;
the first audio mixing module 1221 is configured to obtain a first composite signal according to the audio signal and the response signal;
the first processor 121 is further configured to control the rf frequency of the phase-locked fm modulation module 1222 according to the channel information.
The first audio mixing module 1221 mixes the preprocessed audio signal with the response signal to obtain a first composite signal, and the first processor 121 controls the phase-locked fm modulation module 1222 to obtain the rf frequency. Based on the above embodiment, the wireless microphone can be enabled to transmit the radio frequency signal with the frequency corresponding to the channel information.
In one possible embodiment, the wireless transmitting unit 122 includes a radio frequency power amplifier module 1223;
the radio frequency power amplifier module 1223 is respectively connected with the phase-locked fm modulation module 1222 and the antenna 13;
the rf power amplifier module 1223 is configured to amplify the rf signal.
In a possible implementation, the transmitting chip 12 further includes an analog-to-digital converter 126, and the analog-to-digital converter 126 is connected to the sound pickup 11, the audio preprocessing module 124, and the sound wave demodulation module 123, respectively.
Example 2
Referring to fig. 2, an embodiment of the present application provides a wireless receiver, which includes a receiving chip 22, a speaker 21;
the receiving chip 22 includes: a second processor 221, a receiving unit 222, an acoustic wave modulation module 226, and a power amplifier unit 223;
the second processor 221 is connected to the receiving unit 222;
the power amplifier unit 223 is connected with the receiving unit 222;
the second processor 221 is configured to search for an idle channel, and generate the channel information according to the idle channel;
the receiving unit 222 is configured to receive a radio frequency signal transmitted by the wireless microphone according to the channel information, and convert the radio frequency signal into a first composite signal;
the sound wave modulation module 226 is configured to modulate the channel information to generate a sound wave modulation signal;
illustratively, the acoustic wave modulation module 226 is used to modulate channel information onto high frequency acoustic waves.
The second processor 221 is further configured to receive response information in the first composite signal, where the response information is acknowledgement information about the channel information sent by the wireless microphone;
the power amplifier unit 223 is configured to analyze an audio signal from the first composite signal, and drive the speaker 21 to play the audio signal and/or the sound wave modulation signal, so that the wireless microphone receives the audio signal and/or the sound wave modulation signal.
The sound wave modulation module 226 and the sound wave demodulation module 123, the adopted sound wave frequency is 21kHz, and may be another sound wave frequency;
the second processor 221 is configured to search an idle channel, generate channel information according to the idle channel, generate a sound wave modulation signal according to the channel information by the sound wave modulation module 226, and drive the speaker 21 to play the sound wave modulation signal by the power amplifier unit 223, so that the wireless microphone receives the sound wave modulation signal, and then cooperate with a device in the wireless microphone, so that the wireless receiver and the wireless microphone complete automatic frequency matching.
In one possible embodiment, the receiving chip 22 includes:
an audio post-processing module 227;
the audio post-processing module 227 is respectively connected with the receiving unit 222 and the power amplifier unit 223;
the audio post-processing module 227 is configured to perform low-pass filtering, de-emphasis, and dynamic range extension on the first composite signal to obtain an audio signal.
In the implementation process, the audio post-processing module 227 performs low-pass filtering, de-emphasis and dynamic range extension on the first composite signal to obtain the audio signal, and restores the audio signal received by the sound pickup 11 of the wireless microphone.
In a possible implementation, the receiving chip 22 further includes:
a binary phase shift keying demodulation module 224;
the bpsk demodulation module 224 is connected to the receiving unit 222 and the second processor 221;
the bpsk demodulation module 224 is configured to parse the response information from the first composite signal.
In the above implementation process, the bpsk demodulation module 224 quickly resolves the response information in the first composite signal.
In one possible implementation, the receiving unit 222 includes a radio frequency front end 2221 and a frequency modulation and demodulation module 2222;
the radio frequency front end 2221 is connected with the fm demodulation module 2222;
the second processor 221 and the RF front end 2221,
The fm demodulation module 2222 is connected to the binary phase shift keying demodulation module 224 and the audio post-processing module 227 respectively;
the radio frequency front end 2221 is configured to receive the radio frequency signal according to the channel information, and convert the radio frequency signal into an intermediate frequency signal;
the fm demodulation module 2222 is configured to convert the intermediate frequency signal into a first composite signal.
In the implementation process, the wireless microphone finally transmits a radio frequency signal through the antenna 13, the radio frequency front end 2221 receives the radio frequency signal according to the channel information and converts the radio frequency signal into an intermediate frequency signal, and the fm demodulation module 2222 is configured to convert the intermediate frequency signal into a first composite signal.
In one possible embodiment, the receiving chip 22 includes: a cue tone generator 225;
the power amplifier unit 223 includes: a second audio mixing module 2231, a power amplifier module 2232 and a digital-to-analog converter 2233;
the second mixing module 2231 is connected to the cue tone generator 225, the receiving unit 222, the fm demodulation module 2222, the sound wave modulation module 226, and the digital-to-analog converter 2233;
the power amplifier module 2232 is connected to the digital-to-analog converter 2233;
the second processor 221 is further configured to control the cue tone generator 225 to generate a cue tone signal;
the second sound mixing module 2231 generates a second composite signal according to the audio signal, the sound wave modulation signal and the cue sound signal; the second mixing module 2231 also performs volume control on the output signal of the sound wave modulation module 226 to adapt to speakers with different powers.
The power amplifier module 2232 is configured to drive the speaker 21 to play the second composite signal.
In the implementation process, the second audio mixing module 2231 mixes the cue sound signal, the sound wave modulation signal and the signal output by the audio post-processing module 227, and the power amplifier unit 223 drives the speaker 21 to play the mixed second composite signal.
In one possible embodiment, the wireless receiver further comprises: the keys, which are connected to the second processor 221.
The second processor 221 scans the RSSI value of each channel in response to the trigger signal of the key, and obtains the optimal idle channel according to the RSSI; the alert tone generator generates an alert tone "start pair audio" and plays it through the speaker 21. The rf front end 2221 is further configured to provide an RSSI (Received Signal Strength Indication) estimate; determination of the optimal free channel by the second processor 221: if the channel with the minimum RSSI in the single channel is the channel, generating channel information according to the channel; or if there are three continuous channels and the sum of the RSSI of the three continuous channels is the minimum, selecting the channel among the three channels as the optimal idle channel to generate channel information;
in summary, the sound wave modulation signal is picked up by the sound pickup 11 of the wireless microphone, and the sound wave demodulation module 123 in the wireless microphone decodes the sound wave modulation signal to obtain channel information; based on this information, the wireless microphone goes to the selected optimal idle channel, modulates the reply information sent by the first processor 121 unit by the binary phase shift keying modulation module 125, and sends it to the wireless receiver.
The wireless receiver receives the response information in the optimal idle channel, processes the response information through the second audio mixing module 2231, the power amplifier 2232, the digital-to-analog converter 2233 and the cue tone generator 225, and finally plays the cue tone 'successful frequency alignment' through the loudspeaker 21, thereby completing the frequency alignment.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or a point connection; either directly or indirectly through intervening media, or may be an internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.
In all the above embodiments, the terms "large" and "small" are relative terms, and the terms "more" and "less" are relative terms, and the terms "upper" and "lower" are relative terms, so that the description of these relative terms is not repeated herein.
It should be appreciated that reference throughout this specification to "in this embodiment," "in an embodiment of the present application," or "as an alternative implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in this embodiment," "in the examples of the present application," or "as an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also appreciate that the embodiments described in this specification are all alternative embodiments and that the acts and modules involved are not necessarily required for this application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A wireless microphone, comprising:
a sound pickup; a transmitting chip, an antenna;
the transmitting chip includes: the system comprises a first processor, a wireless transmitting unit and an acoustic wave demodulation module;
the sound wave demodulation module is connected with the sound pickup;
the first processor is connected with the sound wave demodulation module;
the wireless transmitting unit is respectively connected with the sound pickup and the wireless receiver;
the sound pick-up is used for receiving audio signals and sound wave modulation signals;
the sound wave demodulation module is used for analyzing channel information from the sound wave modulation signal;
the channel information is information of available idle channels sent by the wireless receiver;
the first processor is used for adjusting the transmitting frequency of the wireless transmitting unit according to the channel information;
the first processor is further configured to generate response information according to the channel information, where the response information is acknowledgement information about the channel information sent by the wireless microphone to the wireless receiver;
the wireless transmitting unit is used for generating a radio frequency signal according to the audio signal and/or the response information;
the antenna is used for radiating the radio frequency signal into the air.
2. The wireless microphone of claim 1, wherein the transmitting chip comprises: an audio frequency preprocessing module;
the audio frequency preprocessing module is connected with the sound pickup and the wireless transmitting unit;
the audio pre-processing module is used for carrying out low-pass filtering, pre-emphasis and dynamic range compression processing on the audio signal.
3. The wireless microphone of claim 2, wherein the transmitting chip comprises: a binary phase shift keying modulation module;
the binary phase shift keying modulation module is connected with the first processor and the wireless transmitting unit;
the binary phase shift keying modulation module is used for modulating the response information to generate a response signal;
the wireless transmitting unit is used for generating the radio frequency signal according to the audio signal and/or the response signal.
4. The wireless microphone according to claim 3, wherein the wireless transmission unit comprises: the first sound mixing module and the phase-locking frequency modulation module;
the first audio mixing module is connected with the audio preprocessing module;
the phase-locking frequency modulation module is respectively connected with the first sound mixing module and the first processor;
the antenna is connected with the phase-locked frequency modulation module;
the first audio mixing module is used for obtaining a first composite signal according to the audio signal and the response signal;
the first processor is further configured to control a radio frequency of the phase-locked frequency modulation module according to the channel information;
and the phase-locked frequency modulation module generates a radio frequency signal according to the first composite signal.
5. The wireless microphone of claim 4, wherein the wireless transmitting unit further comprises a radio frequency power amplifier module;
the radio frequency power amplifier module is respectively connected with the phase-locked frequency modulation module and the antenna;
the radio frequency power amplifier module is used for amplifying the radio frequency signal.
6. A wireless receiver, comprising: a receiving chip and a loudspeaker;
the receiving chip includes: the second processor, the receiving unit, the sound wave modulation module and the power amplification unit;
the second processor is connected with the receiving unit;
the power amplification unit is connected with the receiving unit;
the second processor is used for searching an idle channel and generating the channel information according to the idle channel;
the receiving unit is used for receiving the radio frequency signal transmitted by the wireless microphone according to any one of claims 1-5 according to the channel information and converting the radio frequency signal into a first composite signal;
the sound wave modulation module is used for modulating the channel information to generate a sound wave modulation signal;
the second processor is further configured to receive response information in the first composite signal, where the response information is acknowledgement information about the channel information sent by the wireless microphone;
the power amplification unit is used for analyzing an audio signal from the first composite signal, driving the loudspeaker to play the audio signal and/or the sound wave modulation signal, and enabling the wireless microphone to receive the audio signal and/or the sound wave modulation signal.
7. The wireless receiver of claim 6, wherein the receiving chip comprises:
an audio post-processing module;
the audio post-processing module is respectively connected with the receiving unit and the power amplification unit;
the audio post-processing module is used for performing low-pass filtering, de-emphasis and dynamic range extension on the first composite signal to obtain the audio signal.
8. The wireless receiver of claim 6, wherein the receiving chip further comprises:
a binary phase shift keying demodulation module;
the binary phase shift keying demodulation module is respectively connected with the receiving unit and the second processor;
the binary phase shift keying demodulation module is used for analyzing response information from the first composite signal.
9. The wireless receiver of claim 7, wherein the receiving unit comprises a radio frequency front end and a frequency modulation demodulation module;
the radio frequency front end is connected with the frequency modulation demodulation module;
the second processor is connected with the radio frequency front end and the frequency modulation demodulation module;
the radio frequency front end is used for receiving the radio frequency signal according to the channel information and converting the radio frequency signal into an intermediate frequency signal;
the FM demodulation module is used for converting the intermediate frequency signal into the first composite signal.
10. The wireless receiver of claim 9,
the receiving chip includes: a cue tone generator;
the power amplifier unit includes: the second sound mixing module, the power amplification module and the digital-to-analog converter;
the second sound mixing module is connected with the cue tone generator, the audio post-processing module, the sound wave modulation module and the digital-to-analog converter;
the power amplification module is connected with the digital-to-analog converter;
the second processor is also used for controlling the cue tone generator to generate cue tone signals;
the second sound mixing module generates a second composite signal according to the audio signal, the sound wave modulation signal and the cue sound signal;
the power amplifier module is used for driving the loudspeaker to play the second composite signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111303774.8A CN114025269A (en) | 2021-11-05 | 2021-11-05 | Wireless microphone and wireless receiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111303774.8A CN114025269A (en) | 2021-11-05 | 2021-11-05 | Wireless microphone and wireless receiver |
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| CN1607742A (en) * | 2003-10-13 | 2005-04-20 | 上海渐华科技发展有限公司 | Voice and control signal transmission method in wireless microphone and transmitter therefor |
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| CN1607742A (en) * | 2003-10-13 | 2005-04-20 | 上海渐华科技发展有限公司 | Voice and control signal transmission method in wireless microphone and transmitter therefor |
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