CN109243414A - K sings system, wireless microphone and its signal transmitting apparatus - Google Patents
K sings system, wireless microphone and its signal transmitting apparatus Download PDFInfo
- Publication number
- CN109243414A CN109243414A CN201811031529.4A CN201811031529A CN109243414A CN 109243414 A CN109243414 A CN 109243414A CN 201811031529 A CN201811031529 A CN 201811031529A CN 109243414 A CN109243414 A CN 109243414A
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- converter
- digital
- audio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005236 sound signal Effects 0.000 claims abstract description 46
- 230000003321 amplification Effects 0.000 claims abstract description 18
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/36—Accompaniment arrangements
- G10H1/361—Recording/reproducing of accompaniment for use with an external source, e.g. karaoke systems
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
- H04B1/0014—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage using DSP [Digital Signal Processor] quadrature modulation and demodulation
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
- G10L2021/02163—Only one microphone
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computational Linguistics (AREA)
- Quality & Reliability (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Transmitters (AREA)
Abstract
The invention discloses a kind of K to sing system, wireless microphone and its signal transmitting apparatus, the signal transmitting apparatus includes transmitting terminal and receiving end, transmitting terminal includes sound pick-up, AD converter, modulation unit, radio frequency amplifier and transmitting antenna, receiving end includes receiving antenna, low-noise amplifier, signal processing unit, first D/A converter, demodulating unit and the second D/A converter, digital audio and video signals are converted audio signals by AD converter in transmitting terminal, digital audio and video signals are modulated into high-frequency digital signal by modulation unit, emit after carrying out power amplification to high-frequency digital signal, high-frequency carrier signal is offset in reverse phase high-frequency carrier signal that receiving end is generated by signal processing unit, first D/A converter carries out digital-to-analogue conversion, demodulating unit restores digital audio and video signals, second D/A converter will count Word audio signal is converted into audio signal and is exported, and without being compressed and being extended to audio signal, improves the audio signal quality of output.
Description
Technical field
The present invention relates to sound technique field, in particular to a kind of signal transmitting apparatus of wireless microphone, a kind of wireless talking
Cylinder and a kind of K sing system.
Background technique
In general, the emitting portion of wireless microphone is battery powered, sound pick-up converts sound into audio electrical signal, then passes through
After crossing internal circuit compression processing, the radio wave comprising audio-frequency information is emitted to the space of surrounding by transmitting antenna.And
By mains-supplied, the radio wave of emitting portion sending is generally received by receiving antenna for the receiving portion of wireless microphone,
Using the demodulation extension process of internal circuit to extract audio signal, and sound reinforcement system is sent to by output signal line
In, to complete the wireless transmission of audio signal.
In order to guarantee that signal there are enough signal-to-noise ratio, the loss of details is reduced, it is necessary to the weak audio that sound pick-up is exported
After electric signal amplification in re-modulation to high frequency wireless carrier.Due to being mode of frequency regulation transmission audio signal, so high-frequency signal pair
Debugged audio signal dynamic requires, and normal audio signal dynamic range has been over mode of frequency regulation to dynamic
Area requirement, it is therefore desirable to dynamic compression is carried out to debugged audio signal before emitting portion carries out frequency modulation modulation, and
It needs to carry out dynamic expansion to the audio signal demodulated in receiving portion.And the compression and extension bring of audio analog signals
Distorted signals and harmonic wave variation will be greatly reduced the performance of sound pick-up, and the complexity of the complexity of circuit and implementation process is also led
The microphone signal of existing analog signal wireless microphone system output is caused to be extremely difficult to the demand that singer deduces freely, it is not only stable
It is poor to spend, and noise, noise and distortion bring sense of hearing fatigue are greatly reduced the experience of user.
Summary of the invention
The present invention is directed at least solve one of the technical problem in above-mentioned technology to a certain extent.For this purpose, of the invention
First purpose be to propose a kind of signal transmitting apparatus of wireless microphone, without being compressed and being extended to audio signal, no
The bandwidth and dynamic problem of wireless microphone are addressed only, while also substantially increasing the quality of wireless microphone audio transmission, is improved
User experience.
Second object of the present invention is to propose a kind of wireless microphone.
Third object of the present invention is to propose a kind of K song system.
In order to achieve the above objectives, the signal transmitting apparatus for the wireless microphone that first aspect present invention embodiment proposes, including
Transmitting terminal and receiving end, wherein the transmitting terminal includes sound pick-up, AD converter, modulation unit, radio frequency amplifier and transmitting day
Line, the sound pick-up are used to the voice signal received being converted into audio signal, the AD converter and the sound pick-up phase
Even, the AD converter is used to being converted to the audio signal into digital audio and video signals, the modulation unit and the AD conversion
Device is connected, and the modulation unit is for being modulated the digital audio and video signals to export high-frequency digital signal, the radio frequency
Amplifier is connected with the modulation unit and the transmitting antenna respectively, and the radio frequency amplifier is used to believe the high-frequency digital
Number power amplification is carried out to export wireless digital signal, and emitted by the transmitting antenna；The receiving end includes connecing
Receive antenna, low-noise amplifier, signal processing unit, the first D/A converter, demodulating unit and the second D/A converter, the reception
Antenna is used to receive the wireless digital signal of the transmitting antenna transmitting, the low-noise amplifier and the receiving antenna phase
Even, the low-noise amplifier is used to carry out noise suppressed to the wireless digital signal to export high s/n ratio signal, described
Signal processing unit is connected with the low-noise amplifier, and the signal processing unit is for offsetting in the high s/n ratio signal
High-frequency carrier signal to export digital intermediate frequency signal, first D/A converter is connected with the signal processing unit, described
First D/A converter is used to for the digital intermediate frequency signal to be converted into analog intermediate frequency signal, the demodulating unit and the first DA
Converter is connected, and the demodulating unit restores the digital audio and video signals, the 2nd DA according to the analog intermediate frequency signal
Converter is connected with the demodulating unit, and the digital audio and video signals are converted into audio signal and carried out by second D/A converter
Output.
The signal transmitting apparatus of wireless microphone according to an embodiment of the present invention is believed audio by AD converter in transmitting terminal
Number digital audio and video signals are converted to, and digital audio and video signals are modulated by high-frequency digital signal by modulation unit, and penetrating
Audio amplifier is emitted by transmitting antenna after high-frequency digital signal progress power amplification, passes through receiving antenna in receiving end
Receive transmitting antenna transmitting wireless digital signal, and by low-noise amplifier to wireless digital signal carry out noise suppressed with
High s/n ratio signal is exported, and high s/n ratio signal is offset by the reverse phase high-frequency carrier signal of signal processing unit generation
In high-frequency carrier signal digital intermediate frequency signal is converted into intermediate frequency to export digital intermediate frequency signal, then by the first D/A converter
Analog signal, such demodulating unit can restore the digital audio and video signals that AD converter is converted out according to analog intermediate frequency signal,
And digital audio and video signals are converted by audio signal by the second D/A converter and are exported, to make digital sound in transmitting terminal
Frequency signal is transferred to receiving end under the influence of not by electromagnetic noise, and receiving end dexterously utilizes signal processing unit to generate
Reverse phase high-frequency carrier signal simulates letter to intermediate frequency using demodulating unit to offset the high-frequency carrier signal that transmitting terminal modulation generates
Number digital audio processing is carried out to restore the digital audio and video signals of no any loss and interference completely, then converted by DA
To Hi-Fi audio signal.Therefore, audio analog signals are directly quantized into digital signal by the present invention, not through overcompression, benefit
Emitted and received with the modulation system of frequency modulation phase modulation, can utmostly restore pickup signal, to substantially increase nothing
The anti-interference ability of line microphone improves the audio signal quality of output, and the audio by restoring better sound pick-up output is believed
Number and improve the performance of sound pick-up so that user experience has obtained greatly being promoted.
In addition, according to embodiments of the present invention the signal transmitting apparatus of wireless microphone set forth above can also have it is following attached
The technical characteristic added:
Optionally, the modulation unit includes: the first radio-frequency signal generator, and first radio-frequency signal generator is used for
Generate high-frequency carrier signal；Frequency modulation phase modulation modulator, the frequency modulation phase modulation modulator occur with first radiofrequency signal respectively
Device is connected with the AD converter, and the frequency modulation phase modulation modulator is by being modulated with will be described the digital audio and video signals
Digital audio and video signals are added to the high-frequency carrier signal, and export the high-frequency digital signal.
Optionally, the signal processing unit includes: the second radio-frequency signal generator, second radio-frequency signal generator
It is connected with the low-noise amplifier, second radio-frequency signal generator is used for according to the high frequency in the high s/n ratio signal
Carrier signal generates reverse phase high-frequency carrier signal；Voice changer, the voice changer respectively with second radio-frequency signal generator and
The low-noise amplifier is connected, and the voice changer is used for according to the reverse phase high-frequency carrier signal to the high s/n ratio signal
In high-frequency carrier signal offset to export the digital intermediate frequency signal.
Wherein, first radio-frequency signal generator matches with second radio-frequency signal generator.
Optionally, the frequency range of the transmitting antenna and the receiving antenna matches.
Optionally, it is transmitted between the transmitting antenna and the receiving antenna using UHF radio waves signal.
Optionally, the sampling frequency of the AD converter is 32KHz, 48KHz or 96KHz.
Optionally, the transmitting terminal further includes supplying cell, and is powered by the supplying cell, and the receiving end is integrated in
In Karaoke all-in-one machine, and it is powered by the DC power supply in the Karaoke all-in-one machine.
In order to achieve the above objectives, second aspect of the present invention embodiment also proposed a kind of wireless microphone comprising above-mentioned reality
Apply the signal transmitting apparatus of the wireless microphone of example.
Wireless microphone according to an embodiment of the present invention, by the signal transmitting apparatus of above-mentioned wireless microphone, can directly by
Audio analog signals are quantized into digital signal, not through overcompression, are emitted and are received using the modulation system of frequency modulation phase modulation,
Pickup signal can be utmostly restored, to substantially increase the anti-interference ability of wireless microphone, improves the audio letter of output
Number quality improves the performance of sound pick-up, so that user experience and restoring the audio signal of better sound pick-up output
Degree has obtained greatly being promoted.
In addition, the embodiment of the present invention also proposed a kind of K song system comprising at least one speaker, Karaoke all-in-one machine,
The wireless microphone of display and above-described embodiment.
K song system according to an embodiment of the present invention can be directly by sound by the signal transmitting apparatus of above-mentioned wireless microphone
Frequency analog signal is quantized into digital signal, not through overcompression, is emitted and is received using the modulation system of frequency modulation phase modulation, energy
It is enough utmostly to restore pickup signal, to substantially increase the anti-interference ability of wireless microphone, improve the audio signal of output
Quality improves the performance of sound pick-up and restoring the audio signal of better sound pick-up output, and such receiving end is restored
Signal out does not have any dynamic loss, the microphone signal amplification end of Karaoke all-in-one machine is sent directly into, because of high frequency modulated
Signal loading is digital audio and video signals, interferes very little to the microphone signal amplification terminal circuit of Karaoke all-in-one machine, will not influence
Audio quality, so that user experience has obtained greatly being promoted.
Detailed description of the invention
Fig. 1 is the block diagram according to the signal transmitting apparatus of the wireless microphone of one embodiment of the invention；
Fig. 2 is to be illustrated according to the principle of transmitting terminal in the signal transmitting apparatus of the wireless microphone of one embodiment of the invention
Figure；
Fig. 3 is to be illustrated according to the principle of receiving end in the signal transmitting apparatus of the wireless microphone of one embodiment of the invention
Figure；
Fig. 4 is the block diagram according to the Karaoke all-in-one machine of one embodiment of the invention；
Fig. 5 is the Karaoke all-in-one machine internal power circuit electrical schematic according to one embodiment of the invention；
Fig. 6 is the block diagram according to the wireless microphone of one embodiment of the invention；
Fig. 7 is the block diagram that system is sung according to the K of one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Conventional wireless microphone technology exports weak audio signal by microphone pickup device, and weak audio signal is using having
After the amplification of source amplifying circuit, using radio wave FM (Frequency Modulation, frequency modulation), VHF (Very High
Frequency, very high frequency(VHF)), the modes such as UHF (Ultra High Frequency, superfrequency) be modulated transmitting, then connecing
Receiving end exports after carrying out wireless signal demodulation, for the dynamic and fidelity for ensuring audio signal, uses all wireless Mikes of simulation
Wind system reduces noise and maximizes compression and the expanded circuit of dynamic range, i.e. audio signal needs first to carry out via transmitting terminal
Then compression is extended with being adapted to limited dynamic range during wireless transmission in receiving end.And audio analog signals
Compression and extension bring distorted signals and harmonic wave variation will be greatly reduced the performance of sound pick-up, and the complexity and reality of circuit
The microphone signal that the complexity for applying process also causes existing analog signal wireless microphone system to export is extremely difficult to singer and drills freely
The demand unraveled silk, not only stability is poor, and noise, noise and distortion bring sense of hearing fatigue are greatly reduced the experience of user.
In order to overcome these deficiencies, the signal transmitting apparatus for the wireless microphone that the embodiment of the present invention proposes, passes through in transmitting terminal
AD converter converts audio signals into digital audio and video signals, and digital audio and video signals are modulated into high frequency by modulation unit
Word signal, and emitted after radio frequency amplifier carries out power amplification to high-frequency digital signal by transmitting antenna, it is connecing
Receiving end receives the wireless digital signal of transmitting antenna transmitting by receiving antenna, and is believed by low-noise amplifier wireless digital
Number carry out noise suppressed to export high s/n ratio signal, and by reverse phase high-frequency carrier signal that signal processing unit generates come
The high-frequency carrier signal in high s/n ratio signal is offset to export digital intermediate frequency signal, then passes through the first D/A converter for middle frequency
Word signal is converted into analog intermediate frequency signal, and such demodulating unit can restore AD converter according to analog intermediate frequency signal and convert out
Digital audio and video signals, and digital audio and video signals are converted by audio signal by the second D/A converter and are exported, thus
Transmitting terminal makes digital audio and video signals be transferred to receiving end under the influence of not by electromagnetic noise, and receiving end dexterously utilizes letter
The reverse phase high-frequency carrier signal that number processing unit generates offsets the high-frequency carrier signal that transmitting terminal modulation generates, and utilizes demodulation
Cell pairs frequency analog signal carries out digital audio processing to restore the digital audio letter of no any loss and interference completely
Number, then Hi-Fi audio signal is obtained by digital-to-analogue conversion, without being compressed and being extended to audio signal, not only solve nothing
The bandwidth and dynamic problem of line microphone, while the quality of wireless microphone audio transmission is also substantially increased, improve user experience.
In order to better understand the above technical scheme, the exemplary reality that the present invention will be described in more detail below with reference to accompanying drawings
Apply example.Although showing exemplary embodiment of the present invention in attached drawing, it being understood, however, that may be realized in various forms this hair
It is bright and should not be limited by the embodiments set forth herein.It is to be able to thoroughly understand this on the contrary, providing these embodiments
Invention, and the scope of the present invention can be fully disclosed to those skilled in the art.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Fig. 1 is the block diagram according to the signal transmitting apparatus of the wireless microphone of the embodiment of the present invention.As shown in Figure 1,
The signal transmitting apparatus of the wireless microphone includes transmitting terminal 10 and receiving end 20.
Wherein, transmitting terminal 10 includes sound pick-up 101, AD converter 102, modulation unit 103, radio frequency amplifier 104 and hair
Antenna 105 is penetrated, sound pick-up 101 is used to the voice signal received being converted into audio signal, AD converter 102 and sound pick-up
101 are connected, and AD converter 102 is for converting audio signals into digital audio and video signals, modulation unit 103 and AD converter 102
It is connected, for being modulated to digital audio and video signals to export high-frequency digital signal, radio frequency amplifier 104 divides modulation unit 103
It is not connected with modulation unit 103 and transmitting antenna 105, radio frequency amplifier 104 is used to carry out power amplification to high-frequency digital signal
To export wireless digital signal, and emitted by transmitting antenna 105.
Specifically, sound pick-up 101 is a device for being transmitted to rear end equipment again for acquiring user voice, generally by
Microphone (i.e. microphone) and audio amplifier circuit are constituted, and voice signal can be converted into audio electrical signal, then by voiceband telecommunication
It number is sent to AD converter 102 and carries out analog-to-digital conversion to export digital audio and video signals, and by modulation unit 103 to digital audio
Signal carries out frequency modulation phase modulation to transmit digital audio and video signals load in high-frequency carrier signal, then passes through radio frequency amplifier
After 104 carry out power amplification, then pass through transmitting antenna 105 and be emitted in surrounding space, so that receiving end 20 is received.
In an embodiment of the present invention, the letter that transmitting terminal 10 is exported without any active analog amplifying circuit, sound pick-up 101
Analog-to-digital conversion number is directly carried out, so as to ensure that sound quality is not damaged, circuit is simple, and it is low in energy consumption, there is no additional interference signal yet,
The signal that receiving end 20 restores in this way does not have any dynamic loss.
As shown in Figure 1, receiving end 20 includes receiving antenna 201, low-noise amplifier 202, signal processing unit 203, the
One D/A converter 204, demodulating unit 205 and the second D/A converter 206, receiving antenna 201 is for receiving the transmitting of transmitting antenna 105
Wireless digital signal, low-noise amplifier 202 is connected with receiving antenna 201, and low-noise amplifier 202 is used for wireless digital
Signal carries out noise suppressed to export high s/n ratio signal, and signal processing unit 203 is connected with low-noise amplifier 202, signal
Processing unit 203 is used to offset the high-frequency carrier signal in high s/n ratio signal to export digital intermediate frequency signal, the first DA conversion
Device 204 is connected with signal processing unit 203, and the first D/A converter 204 is used to for digital intermediate frequency signal being converted into intermediate frequency simulation letter
Number, demodulating unit 205 is connected with the first D/A converter 204, and demodulating unit 205 restores digital audio according to analog intermediate frequency signal
Signal, the second D/A converter 206 are connected with demodulating unit 205, and digital audio and video signals are converted into audio by the second D/A converter 206
Signal is exported.
Wherein, transmitting antenna 105 and the frequency range of receiving antenna 201 match, so as to effectively receive transmitting antenna 105
The wireless digital signal of transmitting realizes the wireless transmission of digital signal.
As an example, between transmitting antenna 105 and receiving antenna 201 using superfrequency UHF radio wave signal into
Row transmission.Specifically, superfrequency refers to that wave-length coverage is 1m~1dm, and frequency is the radio wave of 300~3000MHz, using spy
High frequency UHF radio wave signal is transmitted, and electromagnetic interference can be substantially reduced, and guarantees that signal will not distort.
Specifically, fainter when the wireless digital signal received by receiving antenna 201, this just needs receiving
End setting amplifier amplifies signal, and in the occasion of amplification small-signal, the noise of amplifier itself does signal
Disturbing may be very serious, it is therefore desirable to reduce this noise, to improve the signal-to-noise ratio of output, thus very low by using noise coefficient
Amplifier noise suppressed is carried out to export high s/n ratio signal to wireless digital signal, then pass through signal processing unit 203
The reverse phase high-frequency carrier signal opposite with high-frequency carrier signal is generated to offset the high-frequency carrier signal in high s/n ratio signal, from
And digital intermediate frequency signal is exported, and digital-to-analogue conversion is carried out to digital intermediate frequency signal by the first D/A converter 204, it in this way can be defeated
Analog intermediate frequency signal out, and demodulating unit 205 carries out signal also using digital audio processing algorithm according to analog intermediate frequency signal
Original, to demodulate the digital audio and video signals of no any loss and interference, finally by the second D/A converter 206 to digital audio
Signal carries out digital-to-analogue conversion, to export the audio signal of no any dynamic loss, can be sent directly into Karaoke all-in-one machine
Microphone signal amplifies end, because high-frequency modulation signal load is digital audio and video signals, to the microphone signal of Karaoke all-in-one machine
Amplify terminal circuit and interfere very little, will not influence audio quality completely, so that user experience has obtained greatly being promoted.
Therefore, the signal transmitting apparatus of the wireless microphone of the embodiment of the present invention passes through several component modulation radio carrier waves
Analogue audio frequency is converted into digital signal, digital audio and video signals reach receiving end, Ren He under the influence of not by electromagnetic noise
Critical value frequency analog noise signal below all will not influence audio quality, and it is not 1 that receiving end, which can simply be ignored any,
Or 0 thing, i.e., every other is all dropped, and only digital signal can be identified, carries out nothing by digital signal completely
Line transmission, does not need any companding process, can be for the penetrating audio of high quality, and can reach the sound of entire audible
Frequency range has flat frequency response.Also, do not postpone in transmission process for digital signal, digital audio and video signals are to add
It is downloaded to what high-frequency carrier signal was transmitted, transport protocol, such wireless digital signal is not needed between transmitting terminal and receiving end
It is non-read-write, without the wireless digital electric wave signal of storage.
According to one embodiment of present invention, as shown in Fig. 2, modulation unit 103 includes the first radio-frequency signal generator
1031 and frequency modulation phase modulation modulator 1032, the first radio-frequency signal generator 1031 is for generating high-frequency carrier signal, frequency modulation phase modulation
Modulator 1032 is connected with the first radio-frequency signal generator 1031 and AD converter 102 respectively, and frequency modulation phase modulation modulator 1032 is logical
It crosses and digital audio and video signals is modulated so that digital audio and video signals to be added to high-frequency carrier signal, and export high-frequency digital letter
Number.
That is, frequency modulation phase modulation modulator 1032 is to carry out frequency modulation to the digital audio and video signals that AD converter 102 exports
Phase modulation processing, so that modulated digital audio and video signals are loaded into high-frequency carrier signal, to generate high-frequency digital signal progress
Output.
Further, in one embodiment of the invention, as shown in figure 3, signal processing unit 203 includes the second radio frequency
Signal generator 2031 and voice changer 2032, the second radio-frequency signal generator 2031 are connected with low-noise amplifier 202, and second penetrates
Frequency signal generator 2031 is used to generate reverse phase high-frequency carrier signal according to the high-frequency carrier signal in high s/n ratio signal；The change of voice
Device 2032 is connected with the second radio-frequency signal generator 2031 and low-noise amplifier 202 respectively, and voice changer 2032 is used for according to anti-
Phase high-frequency carrier signal offsets to export digital intermediate frequency signal the high-frequency carrier signal in high s/n ratio signal.
That is, the second radio-frequency signal generator 2031 is the high frequency generated according to the first radio-frequency signal generator 1031
Carrier signal generates the reverse phase high-frequency carrier signal that can be cancelled out each other therewith, and such voice changer 2032 believes reverse phase high frequency carrier
Number with high s/n ratio signal be overlapped processing, so as to by high s/n ratio signal high-frequency carrier signal counteracting to export
Digital intermediate frequency signal.
Therefore, as an example, the first radio-frequency signal generator 1031 and the second radio-frequency signal generator 2031 need
Match, the two can generate the high-frequency carrier signal cancelled out each other.
According to one embodiment of present invention, the sampling frequency of AD converter 102 can be 32KHz, 48KHz or 96KHz.
It should be noted that the sampling frequency of AD converter 102 can be sent out with the raising of system requirements and hardware technology
Higher frequency is selected in exhibition, such as can select 96KHz.The sampling frequency of certain 32KHz, which is also able to satisfy some relative requirements, not to be had
So high application is such as broadcast live, reads aloud, impart knowledge to students and move small-sized type singing system.And for CD grades of high-fidelity of standard, it needs to select
With 48KHz or more than sampling frequency.
Since 48KHz or the above sampling frequency are CD grades of high-fidelity of standards, so the wireless microphone of the embodiment of the present invention
Signal transmitting apparatus in wireless microphone transmitting terminal, do not need any active analog amplifying circuit, the faint sound of sound pick-up output
Frequency signal is directly converted using the high-quality low-cost A/D chip of 48KHz or the above sampling frequency, output digital audio letter
Number, then it is modulated by frequency modulation phase modulation modulator 1032, so that digital audio and video signals after modulation are added to high frequency carrier letter
Number to export high-frequency digital signal, it is wireless to export that power amplification then is carried out to high-frequency digital signal by radio frequency amplifier 104
Digital signal, and emitted by transmitting antenna 105；And receiving end receives wireless digital signal by receiving antenna 201, then
Signal amplification is carried out by low-noise amplifier 202, and carries out noise suppressed in signal amplification, to export high s/n ratio letter
Number to the second radio-frequency signal generator 2031 and voice changer 2032, the second radio-frequency signal generator 2031 is believed according to the first radio frequency
The high-frequency carrier signal that number generator 1031 generates generates the reverse phase high-frequency carrier signal that can be cancelled out each other therewith, such change of voice
Reverse phase high-frequency carrier signal and high s/n ratio signal are overlapped processing by device 2032, so as to will be in high s/n ratio signal
High-frequency carrier signal is offset to export digital intermediate frequency signal, then is counted by the first D/A converter 204 to digital intermediate frequency signal
Mould conversion is to export analog intermediate frequency signal to such as DSP of demodulating unit 205 (Digital Signal Processing, number letter
Number processor) frequency modulation phase modulation demodulation is carried out, to utilize digital audio processing algorithm, being restored according to analog intermediate frequency signal does not have
The digital audio and video signals of any loss and interference, then Hi-Fi audio signal is changed into the second D/A converter 206, this process institute
Influence of the electromagnetism physical disturbance to signal be the smallest.Wherein, by allowing closer channel spacing, the present invention is implemented
The signal transmitting apparatus of the wireless microphone of example can be inside a certain frequency range simultaneously using more effectively compatible frequency points, this is special
Property many wireless microphones operation increasingly crowded uhf television frequency band in it is particularly important, greatly expand using model
It encloses.
According to one embodiment of present invention, as shown in Figures 2 and 3, transmitting terminal 10 further includes supplying cell 106, and is sent out
End 106 is penetrated to be powered by supplying cell 106, and receiving end 20 can be integrated in Karaoke all-in-one machine, and pass through Karaoke all-in-one machine
Interior DC power supply 207 is powered.
As an example, with reference to shown in Fig. 4 to Fig. 5, which includes shell 100, wireless microphone reception
Device, that is, receiving end 20, effect device 30, audio-frequency power amplifier 40, power circuit 50, program request mainboard 60, digital audio care 70 and hard disk
80.Wherein, wireless microphone receiver 20, effect device 30, audio-frequency power amplifier 40, power circuit 50, program request mainboard 60, number
Sound card 70 and hard disk 80 are integrally disposed in shell 100.
Also, as shown in figure 5, power circuit 50 includes: the first AC/DC converter 500,501 and of the first DC/DC converter
2nd DC/DC converter 502.The exchange city for the alternating current such as 220V/50Hz that first AC/DC converter 500 is used to input
Electricity is converted to the first direct current, to be supplied to audio-frequency power amplifier 40；First DC/DC converter 501 and the first AC/DC are converted
Device 500 is connected, and the first DC/DC converter 501 is used to the first direct current being converted to the second direct current i.e. DC power supply 207, with
It is respectively supplied to wireless microphone receiver 20, effect device 30 and digital audio care 70, wherein the voltage of the second direct current is less than first
The voltage of direct current；2nd DC/DC converter 502 is connected with the first AC/DC converter 500, and the 2nd DC/DC converter 502 is used
In the first direct current is converted to third direct current, to be respectively supplied to program request mainboard 60 and hard disk 80, wherein third direct current
Voltage less than the first direct current voltage.
That is, Karaoke all-in-one machine is integrally disposed in shell 100 using the power source design powered independently of each other
Audio-frequency power amplifier 40, karaoke effect device 30, wireless microphone receiver 20, such as VOD of program request mainboard 60 (Video On
Demand, video on demand) system board, movie and video programs song storage hard disk 80 and these functional hardware modules of digital audio care 70 need
Want respective DC power-supply circuit.
Wherein, audio-frequency power amplifier needs the first powered by direct current, such as the high efficiency DC power supply of 36V/10A or more
Power supply；Karaoke effect device, wireless microphone receiver and digital audio care need the second powered by direct current, such as independent 12V/3A
High efficiency DC power supply 207 power；VOD system mainboard, movie and video programs song storage hard disk need third powered by direct current, example
As the high efficiency DC power supply of independent 12V/23A is powered.
Using above-mentioned independently-powered power source design, circuit is separated, making will not be because electric power loop be mixed between each functional module
Disorderly interfere and deteriorating process audio-video quality, make it possible play Karaoka all-in-one machine Highgrade integration.
As an example, the first AC/DC converter 500 can be provided with the 36V/15A high efficiency of independent metal shell
DC power supply, the first DC/DC converter 501 and the 2nd DC/DC converter 502 can provide two blocks of full isolated DC conversion electricity
36V direct current can be converted into the 12V DC electricity completely isolated with input terminal, to realize all-in-one machine three zones by source
The autonomous power supply system of module.
According to one embodiment of present invention, the first DC/DC converter 501 and 502 structure phase of the 2nd DC/DC converter
Together, and the voltage of the second direct current is equal with the voltage of third direct current, such as is 12V.
Specifically, the voltage of first direct current is 36V, the voltage of second direct current and the third direct current
Voltage be 12V.
Wherein, the first AC/DC converter 500 uses independent packed by metal casing, and independent metal shell and shell
A shielding space is limited, to place the first DC/DC converter 501 and the 2nd DC/DC converter 502.
That is, having independent metal shell and providing the first AC/DC converter of 36V/15A high efficiency DC power supply
500 are placed in the all-in-one machine left side, cross one close to full-shield space, to place two pieces of full isolation with all-in-one machine machine shell
DC conversion power i.e. the first DC/DC converter 501 and the 2nd DC/DC converter 502 ensures that the first DC/DC becomes in this way
Parallel operation 501 and the 2nd DC/DC converter 502 are minimum to the high frequency electromagnetic radiation interference of complete machine.
In conclusion the Karaoke all-in-one machine of the embodiment of the present invention puts wireless microphone receiver, effect device, audio power
Big device, power circuit, program request mainboard, digital audio care and hard disk are integrated together, and internal signal wire is using reasonable wiring
Mode connects and the intracorporal component of shell is using cleverly layout structure and the power management scheme powered independently of each other, makes
It obtains electromagnetic interference to substantially reduce, so that the Highgrade integration of Karaoke all-in-one machine is possibly realized, and then can go out
Being adjusted optimally equipment before factory makes K song system become only display, Karaoke all-in-one machine, wireless microphone and voice box group
At a set of simple portable systems, connection is simple and convenient, be easy installation, while bringing great convenience to user, mention
High user experience.
The signal transmitting apparatus of wireless microphone according to an embodiment of the present invention is believed audio by AD converter in transmitting terminal
Number digital audio and video signals are converted to, and digital audio and video signals are modulated by high-frequency digital signal by modulation unit, and penetrating
Audio amplifier is emitted by transmitting antenna after high-frequency digital signal progress power amplification, passes through receiving antenna in receiving end
Receive transmitting antenna transmitting wireless digital signal, and by low-noise amplifier to wireless digital signal carry out noise suppressed with
High s/n ratio signal is exported, and high s/n ratio signal is offset by the reverse phase high-frequency carrier signal of signal processing unit generation
In high-frequency carrier signal digital intermediate frequency signal is converted into intermediate frequency to export digital intermediate frequency signal, then by the first D/A converter
Analog signal, such demodulating unit can restore the digital audio and video signals that AD converter is converted out according to analog intermediate frequency signal,
And digital audio and video signals are converted by audio signal by the second D/A converter and are exported, to make digital sound in transmitting terminal
Frequency signal is transferred to receiving end under the influence of not by electromagnetic noise, and receiving end dexterously utilizes signal processing unit to generate
Reverse phase high-frequency carrier signal simulates letter to intermediate frequency using demodulating unit to offset the high-frequency carrier signal that transmitting terminal modulation generates
Number digital audio processing is carried out to restore the digital audio and video signals of no any loss and interference completely, then converted by DA
To Hi-Fi audio signal.Therefore, audio analog signals are directly quantized into digital signal by the present invention, not through overcompression, benefit
Emitted and received with the modulation system of frequency modulation phase modulation, can utmostly restore pickup signal, to substantially increase nothing
The anti-interference ability of line microphone improves the audio signal quality of output, and the audio by restoring better sound pick-up output is believed
Number and improve the performance of sound pick-up so that user experience has obtained greatly being promoted.
As shown in fig. 6, the embodiment of the present invention also proposed a kind of wireless microphone 1 comprising the wireless talking of above-described embodiment
The signal transmitting apparatus 2 of cylinder.
Wireless microphone according to an embodiment of the present invention, by the signal transmitting apparatus of above-mentioned wireless microphone, can directly by
Audio analog signals are quantized into digital signal, not through overcompression, are emitted and are received using the modulation system of frequency modulation phase modulation,
Pickup signal can be utmostly restored, to substantially increase the anti-interference ability of wireless microphone, improves the audio letter of output
Number quality improves the performance of sound pick-up, so that user experience and restoring the audio signal of better sound pick-up output
Degree has obtained greatly being promoted.
In addition, as shown in fig. 7, the embodiment of the present invention also proposed a kind of K song system 1000 comprising at least one speaker
2000, the wireless microphone 1 of display 3000, Karaoke all-in-one machine 4000 and above-described embodiment description, thus will before factory
Equipment is adjusted optimally, it will be able to K song system be made to become only display, wireless microphone, Karaoke all-in-one machine and speaker
A set of simple portable systems of composition.
K song system according to an embodiment of the present invention can be directly by sound by the signal transmitting apparatus of above-mentioned wireless microphone
Frequency analog signal is quantized into digital signal, not through overcompression, is emitted and is received using the modulation system of frequency modulation phase modulation, energy
It is enough utmostly to restore pickup signal, to substantially increase the anti-interference ability of wireless microphone, improve the audio signal of output
Quality improves the performance of sound pick-up and restoring the audio signal of better sound pick-up output, and such receiving end is restored
Signal out does not have any dynamic loss, the microphone signal amplification end of Karaoke all-in-one machine is sent directly into, because of high frequency modulated
Signal loading is digital audio and video signals, interferes very little to the microphone signal amplification terminal circuit of Karaoke all-in-one machine, will not influence
Audio quality, so that user experience has obtained greatly being promoted.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It is interpreted as that identical embodiment or example must be directed to.Moreover, particular features, structures, materials, or characteristics described
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, those skilled in the art can
Different embodiments or examples described in this specification are engaged and be combined.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of signal transmitting apparatus of wireless microphone, which is characterized in that including transmitting terminal and receiving end, wherein
The transmitting terminal includes sound pick-up, AD converter, modulation unit, radio frequency amplifier and transmitting antenna, and the sound pick-up is used
In the voice signal received is converted into audio signal, the AD converter is connected with the sound pick-up, the AD converter
For the audio signal to be converted to digital audio and video signals, the modulation unit is connected with the AD converter, the modulation
Unit for being modulated to the digital audio and video signals to export high-frequency digital signal, the radio frequency amplifier respectively with it is described
Modulation unit is connected with the transmitting antenna, the radio frequency amplifier be used for the high-frequency digital signal carry out power amplification with
Wireless digital signal is exported, and is emitted by the transmitting antenna；
The receiving end include receiving antenna, low-noise amplifier, signal processing unit, the first D/A converter, demodulating unit and
Second D/A converter, the receiving antenna are used to receive the wireless digital signal of the transmitting antenna transmitting, and the low noise is put
Big device is connected with the receiving antenna, and the low-noise amplifier is used to carry out noise suppressed to the wireless digital signal with defeated
High s/n ratio signal out, the signal processing unit are connected with the low-noise amplifier, and the signal processing unit is for supporting
The high-frequency carrier signal to disappear in the high s/n ratio signal is to export digital intermediate frequency signal, first D/A converter and the letter
Number processing unit is connected, and first D/A converter is used to the digital intermediate frequency signal being converted into analog intermediate frequency signal, described
Demodulating unit is connected with first D/A converter, and the demodulating unit restores the number according to the analog intermediate frequency signal
Audio signal, second D/A converter are connected with the demodulating unit, and second D/A converter believes the digital audio
Number being converted into audio signal is exported.
2. the signal transmitting apparatus of wireless microphone as described in claim 1, which is characterized in that the modulation unit includes:
First radio-frequency signal generator, first radio-frequency signal generator is for generating high-frequency carrier signal；
Frequency modulation phase modulation modulator, the frequency modulation phase modulation modulator respectively with first radio-frequency signal generator and the AD conversion
Device is connected, and the frequency modulation phase modulation modulator is by being modulated to fold the digital audio and video signals digital audio and video signals
It is added to the high-frequency carrier signal, and exports the high-frequency digital signal.
3. the signal transmitting apparatus of wireless microphone as claimed in claim 2, which is characterized in that the signal processing unit packet
It includes:
Second radio-frequency signal generator, second radio-frequency signal generator are connected with the low-noise amplifier, and described second
Radio-frequency signal generator is used to generate reverse phase high-frequency carrier signal according to the high-frequency carrier signal in the high s/n ratio signal；
Voice changer, the voice changer is connected with second radio-frequency signal generator and the low-noise amplifier respectively, described
Voice changer is for offsetting the high-frequency carrier signal in the high s/n ratio signal according to the reverse phase high-frequency carrier signal
To export the digital intermediate frequency signal.
4. the signal transmitting apparatus of wireless microphone as claimed in claim 3, which is characterized in that first radiofrequency signal occurs
Device matches with second radio-frequency signal generator.
5. such as the signal transmitting apparatus of wireless microphone of any of claims 1-4, which is characterized in that the transmitting day
The frequency range of line and the receiving antenna matches.
6. the signal transmitting apparatus of wireless microphone as claimed in claim 5, which is characterized in that the transmitting antenna connects with described
It receives and is transmitted between antenna using UHF radio waves signal.
7. the signal transmitting apparatus of wireless microphone as described in claim 1, which is characterized in that the sampling frequency of the AD converter
Rate is 32KHz, 48KHz or 96KHz.
8. the signal transmitting apparatus of wireless microphone as described in claim 1, which is characterized in that the transmitting terminal further includes power supply
Battery, and powered by the supplying cell, the receiving end is integrated in Karaoke all-in-one machine, and passes through the Karaoke one
DC power supply in machine is powered.
9. a kind of wireless microphone, which is characterized in that the signal including wireless microphone such as of any of claims 1-8 passes
Defeated device.
10. a kind of K sings system, which is characterized in that including at least one speaker, Karaoke all-in-one machine, display and as right is wanted
Wireless microphone described in asking 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811031529.4A CN109243414A (en) | 2018-09-05 | 2018-09-05 | K sings system, wireless microphone and its signal transmitting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811031529.4A CN109243414A (en) | 2018-09-05 | 2018-09-05 | K sings system, wireless microphone and its signal transmitting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109243414A true CN109243414A (en) | 2019-01-18 |
Family
ID=65060563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811031529.4A Pending CN109243414A (en) | 2018-09-05 | 2018-09-05 | K sings system, wireless microphone and its signal transmitting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109243414A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110971258A (en) * | 2019-11-15 | 2020-04-07 | 苏炜 | Audio signal amplification method |
| CN111754964A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Sound processing device and method, karaoke system and vehicle |
| CN111756665A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Method and device for automatically matching karaoke songs and vehicle |
| CN112714346A (en) * | 2020-12-28 | 2021-04-27 | 江西创成微电子有限公司 | Live broadcast system and audio signal transmission system and equipment thereof |
| CN112908287A (en) * | 2021-01-14 | 2021-06-04 | 北京雷石天地电子技术有限公司 | Audio processing device and audio processing method |
| CN117750279A (en) * | 2024-02-18 | 2024-03-22 | 浙江华创视讯科技有限公司 | Audio signal processing method, device, audio output system, equipment and medium |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030023988A1 (en) * | 2001-07-16 | 2003-01-30 | Youne-Sang Lee | System and method for restoring digital TV signal |
| US20050057403A1 (en) * | 2003-08-26 | 2005-03-17 | Uni-Art Precise Products Ltd. | Local wireless audio signal RF transmitter and receiver |
| CN101521517A (en) * | 2008-02-26 | 2009-09-02 | 索尼株式会社 | Communication device, noise removing method, and program |
| CN201699688U (en) * | 2010-06-09 | 2011-01-05 | 张健 | Special teaching wireless microphone |
| CN102355620A (en) * | 2011-06-09 | 2012-02-15 | 周意春 | Method for realizing automatic debugging of wireless microphone and automatic debugging system |
| CN102368689A (en) * | 2011-10-17 | 2012-03-07 | 北京正唐科技有限责任公司 | Multi-point data transmission system based on wireless spread spectrum communication |
| CN104349247A (en) * | 2014-10-28 | 2015-02-11 | 张炳翔 | Wireless microphone system based on RDS (Radio Data System) data communication |
| CN205195907U (en) * | 2015-11-24 | 2016-04-27 | 珠海市特乐雅有限公司 | It is automatic to frequency signal wireless microphone system to last transmission |
| CN106059598A (en) * | 2016-05-03 | 2016-10-26 | 广东欧珀移动通信有限公司 | Anti-harmonic interference device of carrier aggregation, antenna device and mobile terminal |
| CN205812305U (en) * | 2016-06-03 | 2016-12-14 | 边江 | A kind of intelligent radio microphone |
| CN206908778U (en) * | 2017-06-30 | 2018-01-19 | 江西创成微电子有限公司 | A kind of wireless microphone |
-
2018
- 2018-09-05 CN CN201811031529.4A patent/CN109243414A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030023988A1 (en) * | 2001-07-16 | 2003-01-30 | Youne-Sang Lee | System and method for restoring digital TV signal |
| US20050057403A1 (en) * | 2003-08-26 | 2005-03-17 | Uni-Art Precise Products Ltd. | Local wireless audio signal RF transmitter and receiver |
| CN101521517A (en) * | 2008-02-26 | 2009-09-02 | 索尼株式会社 | Communication device, noise removing method, and program |
| CN201699688U (en) * | 2010-06-09 | 2011-01-05 | 张健 | Special teaching wireless microphone |
| CN102355620A (en) * | 2011-06-09 | 2012-02-15 | 周意春 | Method for realizing automatic debugging of wireless microphone and automatic debugging system |
| CN102368689A (en) * | 2011-10-17 | 2012-03-07 | 北京正唐科技有限责任公司 | Multi-point data transmission system based on wireless spread spectrum communication |
| CN104349247A (en) * | 2014-10-28 | 2015-02-11 | 张炳翔 | Wireless microphone system based on RDS (Radio Data System) data communication |
| CN205195907U (en) * | 2015-11-24 | 2016-04-27 | 珠海市特乐雅有限公司 | It is automatic to frequency signal wireless microphone system to last transmission |
| CN106059598A (en) * | 2016-05-03 | 2016-10-26 | 广东欧珀移动通信有限公司 | Anti-harmonic interference device of carrier aggregation, antenna device and mobile terminal |
| CN205812305U (en) * | 2016-06-03 | 2016-12-14 | 边江 | A kind of intelligent radio microphone |
| CN206908778U (en) * | 2017-06-30 | 2018-01-19 | 江西创成微电子有限公司 | A kind of wireless microphone |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111754964A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Sound processing device and method, karaoke system and vehicle |
| CN111756665A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Method and device for automatically matching karaoke songs and vehicle |
| CN111756665B (en) * | 2019-03-29 | 2022-03-18 | 比亚迪股份有限公司 | Method and device for automatically matching karaoke songs and vehicle |
| CN110971258A (en) * | 2019-11-15 | 2020-04-07 | 苏炜 | Audio signal amplification method |
| CN112714346A (en) * | 2020-12-28 | 2021-04-27 | 江西创成微电子有限公司 | Live broadcast system and audio signal transmission system and equipment thereof |
| CN112908287A (en) * | 2021-01-14 | 2021-06-04 | 北京雷石天地电子技术有限公司 | Audio processing device and audio processing method |
| CN112908287B (en) * | 2021-01-14 | 2023-07-04 | 北京雷石天地电子技术有限公司 | Audio processing device and audio processing method |
| CN117750279A (en) * | 2024-02-18 | 2024-03-22 | 浙江华创视讯科技有限公司 | Audio signal processing method, device, audio output system, equipment and medium |
| CN117750279B (en) * | 2024-02-18 | 2024-05-07 | 浙江华创视讯科技有限公司 | Audio signal processing method, device, audio output system, equipment and medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109243414A (en) | K sings system, wireless microphone and its signal transmitting apparatus | |
| US8693951B2 (en) | Wireless audio frequency playing apparatus and wireless playing system using the same | |
| CN208954625U (en) | K sings system, wireless microphone and its signal transmitting apparatus | |
| CN102984625A (en) | Car audio system and control method thereof | |
| JP4705185B2 (en) | DMB receiving portable device for human body communication and DMB transmission method thereof, DMB receiving HMD device using human body communication and DMB transmission method thereof | |
| CN202979214U (en) | Sound box | |
| CN201438730U (en) | Television capable of playing 5.1-channel audio | |
| US7343015B2 (en) | Method and apparatus for high fidelity wireless stereophonic transmission utilizing dual frequency carriers | |
| CN102055490A (en) | Frequency modulation (FM) broadcasting method, device and terminal | |
| CN203747954U (en) | Microphone and audio transmission system | |
| CN203278826U (en) | Audio wireless transmission system | |
| US8442438B2 (en) | Wireless transmitter and related multimedia system | |
| CN1156997C (en) | Radio communication equipment | |
| CN201413922Y (en) | Pluggable antenna and audio frequency switching device | |
| CN209861096U (en) | Multi-functional plug-in card bluetooth karaoke stereo set PCBA board | |
| CN111867145A (en) | 5G sound box, distributed sound system based on 5G sound box and wireless communication method | |
| CN207560320U (en) | Sound card is broadcast live in a kind of multi-mode radio | |
| CN208094536U (en) | A kind of portable radio of receivable CDR digital audio broadcastings | |
| JP3205125U (en) | Instrument cable with Bluetooth reception function | |
| CN209375865U (en) | A kind of Novel microphone having sound card function | |
| KR200398905Y1 (en) | Earphone Wireless stereo sound transmitter | |
| CN209419814U (en) | High-fidelity radio combination audio | |
| CN208158810U (en) | A kind of wireless translation microphone | |
| CN201025718Y (en) | A TV set with wireless audio radiation and receiving device | |
| CN210042119U (en) | Loudspeaker box and microphone all-in-one machine capable of being wirelessly interconnected |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |