CN114007170A

CN114007170A - Wired audio changes wireless audio frequency processing circuit and earphone receiver

Info

Publication number: CN114007170A
Application number: CN202010735087.2A
Authority: CN
Inventors: 韦伟才; 邓海蛟; 马健莹
Original assignee: Shenzhen Weimai Technology Co ltd
Current assignee: Shenzhen Weimai Technology Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2022-02-01

Abstract

The application belongs to the technical field of portable listening equipment, and relates to a wired audio-to-wireless audio processing circuit and an earphone storage box, wherein wired audio signals are transmitted through an audio transmission circuit; the analog audio-to-digital sampling circuit converts an input wired analog audio signal into a first digital audio signal; the audio control circuit generates an audio control signal according to an input control signal; the sound effect processing circuit performs preset sound effect processing on the first digital audio signal according to the audio control signal to generate a target audio signal; the digital audio coding and decoding circuit generates a wireless radio frequency signal according to the target audio signal; the wireless receiving and transmitting circuit sends the wireless radio frequency signal to the wireless earphone; the realization carries out different audio processing to audio signal and sends audio frequency to wireless earphone with the wireless communication mode and plays, is breaking away from wired constraint's basis, has richened the audio frequency treatment effect, has promoted audio frequency and has experienced and the travelling comfort, has improved the reliability and the practicality of earphone receiver.

Description

Wired audio changes wireless audio frequency processing circuit and earphone receiver

Technical Field

The application belongs to the technical field of portable listening equipment, especially relates to a wired audio changes wireless audio processing circuit and earphone receiver.

Background

Currently, a true wireless stereo headset (i.e. a TWS headset) has become a development trend of the headset industry due to its extremely high portability and infinite wearing feeling, and the continuous progress and development of the bluetooth audio technology. In the traditional true wireless stereo earphone technology, earphone boxes for placing left and right wireless earphones, also called earphone storage boxes, are usually used as charging boxes to charge the earphones placed in the earphone boxes so as to keep the cruising ability of the earphones; or the earphone box is used as a player, the audio power amplifier module is designed on the earphone box to amplify the audio pre-stored in the earphone box, and the audio is played through the loudspeaker to achieve the purpose of playing the audio through the earphone box. The functions of the earphone boxes are single, the earphone boxes can not conveniently and effectively transmit the audio collected from the outside or the audio output by the external audio equipment, and the function of the earphone boxes is limited due to the fact that effective audio management and sound effect processing are conducted on the externally collected audio or the externally input audio or the audio stored in the earphone boxes, corresponding audio effects are poor, the audio using requirements of users cannot be met, and the audio effect experience and entertainment are poor.

Consequently, there is earphone box function limited among the traditional earphone box technical scheme, can not richen effectual audio processing to the audio frequency and make the audio frequency effect poor, user's audio experience is not good problem.

Disclosure of Invention

An object of the application is to provide a wired audio changes wireless audio frequency treatment circuit and earphone receiver, aim at solving how convenient from traditional audio output interface transmission audio frequency for the problem that true wireless stereo earphone received to and solve and can not richen effectual audio treatment to the audio frequency of transmission and make audio frequency effect poor, user's audio experiences not good problem.

The first aspect of the embodiment of the application provides a wired audio changes wireless audio frequency processing circuit, sets up in the earphone containing box, carries out wireless communication with wireless earphone and connects, wired audio changes wireless audio frequency processing circuit and includes:

an audio transmission circuit configured to transmit a wired audio signal;

the analog audio-to-digital sampling circuit is connected with the audio transmission circuit and is configured to convert an input wired analog audio signal into a first digital audio signal;

an audio control circuit configured to generate an audio control signal according to an input control signal;

the audio processing circuit is connected with the analog audio-to-digital sampling circuit and the audio control circuit and is configured to perform preset audio processing on the first digital audio signal according to the audio control signal so as to generate a target audio signal;

the digital audio coding and decoding circuit is connected with the audio control circuit, the sound effect processing circuit and the wireless transceiving circuit and is configured to generate a wireless radio frequency signal according to the target audio signal;

and the wireless transceiving circuit is connected with the digital audio coding and decoding circuit and is configured to send the wireless radio frequency signal to the wireless earphone.

In one embodiment, the wired to wireless audio processing circuit further comprises:

the audio reverberation processing circuit is connected with the audio control circuit and the digital audio coding and decoding circuit and is configured to perform reverberation processing on the first digital audio signal according to the audio control signal so as to generate a reverberation audio signal;

the digital audio codec circuit is further configured to generate the wireless radio frequency signal from the reverberant audio signal.

In one embodiment, the audio transmission circuit includes:

the analog audio transmission circuit is connected with the analog audio-to-digital sampling circuit and is configured to transmit wired analog audio signals;

the digital audio transmission circuit is connected with the digital audio coding and decoding circuit and is configured to transmit wired digital audio signals;

wherein the wired audio signal comprises the wired analog audio signal and the wired digital audio signal.

the pickup microphone circuit is connected with the analog audio-to-digital sampling circuit and is configured to pick up a sound signal to generate a pickup signal; the analog audio-to-digital sampling circuit is further configured to generate a pickup digital audio signal according to the pickup signal; the sound effect processing circuit is also configured to perform preset sound effect processing on the pickup digital audio signal according to the audio control signal so as to generate the target audio signal;

and the digital audio-to-analog output circuit is connected with the sound effect processing circuit and the audio transmission circuit and is configured to generate an analog audio output signal according to the pickup digital audio signal and output the analog audio output signal to the audio transmission circuit.

the key circuit is connected with the audio control circuit and is configured to generate a key control signal according to key operation; the key control signal is used for controlling the on-off, resetting, sound effect processing and reverberation processing of the wired audio-wireless audio processing circuit.

the audio bus interface circuit is connected with the sound effect processing circuit and the audio control circuit and is configured to transmit audio data signals;

the sound effect processing circuit is further configured to generate the target audio signal from the audio data signal.

the charging management circuit is connected with the audio control circuit and is configured to generate a charging signal according to the power supply voltage signal which is connected to the wireless earphone and input so as to charge the wireless earphone and generate a power supply signal so as to supply power.

In one embodiment, the audio reverberation processing circuit adopts a sound card chip.

A second aspect of the present application provides an earphone receiver, the earphone receiver includes: the device comprises a box body, a key, a cover part, a battery power supply and a wired audio-to-wireless audio processing circuit; the cover part and the box body cover and are used for accommodating the battery power supply and the wired audio-to-wireless audio processing circuit in the box body.

In one embodiment, the box body is also provided with an audio transmission interface; the audio transmission interface is used for accessing external audio equipment.

Compared with the prior art, the embodiment of the invention has the following beneficial effects: the wired audio-to-wireless audio processing circuit transmits wired audio signals through the audio transmission circuit; the analog audio-to-digital sampling circuit converts an input wired analog audio signal into a first digital audio signal; the audio control circuit generates an audio control signal according to an input control signal; the sound effect processing circuit performs preset sound effect processing on the first digital audio signal according to the audio control signal to generate a target audio signal; the digital audio coding and decoding circuit generates a wireless radio frequency signal according to the target audio signal; the wireless receiving and transmitting circuit sends the wireless radio frequency signal to the wireless earphone; the wireless earphone has the advantages that the audio signals output by different audio devices and the audio signals collected from the outside can be conveniently and rapidly input, abundant and diversified audio processing is carried out on the input wired stereo audio signals, and then the wired stereo audio signals are converted into wireless audio signals to be output to the wireless earphone to be played, on the basis of getting rid of wired constraint, the audio processing effect is enriched, the wireless audio playing experience and the entertainment comfort are improved, and the practicability of a wired audio-to-wireless audio processing circuit is improved; meanwhile, the reliability and the practicability of the earphone storage box are improved.

Drawings

Fig. 1 is a schematic structural diagram of a wired-to-wireless audio processing circuit according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a wired-to-wireless audio processing circuit according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a wired-to-wireless audio processing circuit according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a wired-to-wireless audio processing circuit according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a wired-to-wireless audio processing circuit according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a wired-to-wireless audio processing circuit according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a wired-to-wireless audio processing circuit according to an embodiment of the present application;

FIG. 8 is an exemplary circuit schematic of an audio processing circuit provided in an embodiment of the present application;

FIG. 9 is an exemplary circuit schematic of an analog audio transmission circuit provided in an embodiment of the present application;

fig. 10 is a schematic diagram of an exemplary circuit of a digital audio transmission circuit according to an embodiment of the present application;

fig. 11 to 13 are schematic structural views of an earphone storage box according to an embodiment of the present application; wherein, 1 is a key; 2 is an indicator light; 3 is a cover component; 4, an earphone accommodating chamber; 101 is a left earphone; 102 is a right earphone; 51. 52 and 53 are type _ C interfaces; 61 is a 3.5mm audio interface; 7 is a battery power supply; 8 is an antenna; 9 is Microphone (MIC); 001 is a first PCB board; and 002 is a second PCB board.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Fig. 1 shows a schematic structural diagram of a wired-to-wireless audio processing circuit provided in a first embodiment of the present application, and for convenience of description, only the parts related to this embodiment are shown, and detailed descriptions are as follows:

the utility model provides an audio frequency processing circuit, sets up in the earphone containing box, carries out wireless communication with wireless earphone 100 and is connected, and wired audio frequency changes wireless audio frequency processing circuit and includes: the device comprises an audio transmission circuit 11, an analog audio-to-digital sampling circuit 12, an audio control circuit 13, a digital audio coding and decoding circuit 14, a sound effect processing circuit 15 and a wireless transceiver circuit 16.

An audio transmission circuit 11 configured to transmit a wired audio signal; an analog-to-digital sampling circuit 12 connected to the audio transmission circuit 11 and configured to convert an input wired analog audio signal into a first digital audio signal; an audio control circuit 13 configured to generate an audio control signal according to an input control signal; the audio processing circuit 15 is connected with the analog audio-to-digital sampling circuit 12 and the audio control circuit 13, and configured to perform preset audio processing on the first digital audio signal according to the audio control signal to generate a target audio signal; the digital audio coding and decoding circuit 14 is connected with the audio control circuit 13, the sound effect processing circuit 15 and the wireless transceiving circuit 16 and is configured to generate a wireless radio frequency signal according to a target audio signal; and the wireless transceiving circuit 16 is connected with the digital audio codec circuit 14 and configured to transmit the wireless radio frequency signal to the wireless headset 100.

In a specific implementation, the optional audio transmission circuit 11 includes an audio transmission interface, and receives a wired audio signal output from an external audio device in a wired communication manner, where the wired audio signal is a stereo audio signal. The external audio equipment can be game machine, sound box, computer, mobile phone or live sound card. The analog audio-to-digital sampling circuit 12 performs an analog-to-digital conversion process on the input wired analog audio signal to generate a first digital audio signal. The sound effect processing circuit 15 performs preset sound effect processing on the first digital audio signal according to the audio control signal to generate a target audio signal. Optionally, the preset sound effect processing includes echo sound effect processing, wet and dry sound effect processing, electric sound processing, sound beautification processing, and the like. The user inputs corresponding control signals according to different audio effect application requirements, the audio control circuit 13 generates audio control signals according to the control signals input by the user, so as to control the audio processing circuit 15 to perform echo audio processing, wet and dry audio processing, electric audio processing or sound beautifying processing on the first digital audio signal, correspondingly generate a target audio signal, and output the target audio signal to the digital audio codec circuit 14. The digital audio codec circuit 14 may be a circuit capable of performing hardware and software compression or decompression on the target audio data according to one or more digital audio codec technology standards (e.g., digital audio codec standard ADPCM/g.726), so as to reduce the bandwidth overhead when the audio data is wirelessly transmitted and received, effectively reduce the audio data storage space, and reduce the bandwidth required for transmitting the stored audio file. Optionally, the digital audio codec circuit 14 comprises an audio codec. The wireless rf signal is output to the wireless transceiver circuit 16, and the wireless rf signal carrying the audio information is sent to the wireless headset 100 through an antenna (e.g., a radio frequency antenna) in the wireless transceiver circuit 16, and the audio information contained in the wireless rf signal is processed by a related audio processing circuit in the wireless headset 100, such as audio decoding and conversion, and then is played through a headset in the wireless headset 100.

Optionally, the wireless communication mode includes, but is not limited to, one of wireless bluetooth communication, wireless WIFI communication, wireless radio frequency communication, and Zigbee.

In a specific implementation, when the audio transmission circuit 11 transmits a wired analog audio signal output by an external audio device, the wired analog audio signal is output to the analog audio-to-digital sampling circuit 12 in the audio processing circuit 12, and the analog audio-to-digital sampling circuit 12 converts the input wired analog audio signal into a first digital audio signal; when the audio transmission circuit 11 transmits a wired digital audio signal output by an external audio device, the wired digital audio signal may be transmitted to the sound effect processing circuit 15 through the analog audio to digital sampling circuit 12, the sound effect processing circuit 15 performs preset sound effect processing on the wired digital audio signal according to the audio control signal to generate a target audio signal, and the digital audio codec circuit 14 performs compression, encoding and other processing on the target audio signal to generate a wireless radio frequency signal. Alternatively, the target audio signal is an audio signal in digital form (digital audio signal). Because the digital audio signal has the characteristics of convenient storage, low storage cost, no sound distortion in the storage and transmission processes, very convenient editing and processing and the like, the analog-to-digital conversion processing is carried out on the audio through the analog-to-digital sampling circuit 12, and compared with the mode that the analog audio is directly amplified and then output for playing, the efficiency of audio transmission and the audio quality can be further improved, so that the effect of playing the audio by the wireless earphone 100 and the comfort of entertainment are improved.

The embodiment of the application can conveniently and effectively insert the audio signals output by different audio devices, and carry out actually required multiple audio processing on the wired stereo audio signals of input, and transfer to wireless audio signal output to wireless earphone for playing, the realization not only can carry out required audio processing on the audio signals sent by the wireless earphone, but also can carry out required audio processing on the digital or analog audio input from an audio transmission interface, on the basis of breaking away from wired constraint, the audio processing effect is enriched, the comfort of wireless audio playing experience and entertainment is effectively improved, and the practicability of converting wired audio into wireless audio processing circuit is improved.

Referring to fig. 2, in one embodiment, the wired audio to wireless audio processing circuit further includes: an audio reverberation processing circuit 17.

An audio reverberation processing circuit 17, connected to the audio control circuit 13 and the digital audio codec circuit 14, configured to perform reverberation processing on the first digital audio signal according to the audio control signal to generate a reverberant audio signal; the digital audio codec circuit 14 is further configured to generate a wireless radio frequency signal from the reverberant audio signal.

In specific implementation, the audio reverberation processing circuit 17 stores various recorded audios in advance, including clapping audio, gunshot audio, laughing audio, and the like, when a reverberation audio effect is required, the audio control circuit 13 generates an audio control signal according to a control signal input by a user, and the audio reverberation processing circuit 17 performs reverberation processing on a first digital audio signal in combination with various pre-stored recorded audios according to the audio control signal to generate a reverberation audio signal and output the reverberation audio signal to the digital audio codec circuit 14. The digital audio codec circuit 14 compresses and encodes the reverberation audio signal to generate a wireless radio frequency signal, and sends the audio after the reverberation processing to the wireless earphone 100 end in a wireless communication manner through the wireless transceiver circuit 16 for playing, so that the audio processing function of the wired audio-wireless audio processing circuit is enriched, the practicability of the wired audio-wireless audio processing circuit is improved, and the audio effect experience is further improved.

In one embodiment, the audio reverberation processing circuit 17 may optionally employ a sound card chip. Optionally, the sound card chip is integrated with a digital signal processor (i.e., a DSP processor), and the digital signal processor is used to implement the audio reverberation processing. Further, the digital signal processor may be a separate chip, or may be a main DSP processor inside the sound card chip, or a second DSP processor or other DSP processors integrated in the sound card chip.

Referring to fig. 3, in one embodiment, the audio transmission circuit 11 includes: an analog audio transmission circuit 111 and a digital audio transmission circuit 112.

The analog audio transmission circuit 111 and the analog audio-to-digital sampling circuit 12 are configured to transmit wired analog audio signals; a digital audio transmission circuit 112, which is connected with the digital audio codec circuit 14 and configured to transmit a wired digital audio signal; the wired audio signal comprises a wired analog audio signal and a wired digital audio signal.

In specific implementation, the analog audio transmission circuit 111 can input and output wired analog audio signals; the digital audio transmission circuit 112 can input and output wired digital audio signals; thereby transmitting the wired audio signal to the associated audio processing circuit.

In one embodiment, the analog audio transmission circuit 111 includes a first audio interface connector and wired analog audio processing circuitry. Optionally, the wired analog audio processing circuit includes an electrostatic protection circuit composed of electrostatic diodes and a first filter circuit. The electrostatic protection circuit can lead instant high voltage into a power supply or the ground, plays the roles of releasing high voltage and protecting a port, and prevents abnormal high voltage caused by circuit abnormity from damaging circuit components; the first filter circuit can comprise an RC filter circuit consisting of a capacitor and a resistor, and can filter electromagnetic interference in the wired analog audio signal; the electrostatic protection and filtering noise reduction processing of the input wired analog audio signal are realized. Optionally, the first audio interface connector is a physical connector a, which includes three signal pins of a left channel, a right channel and a ground, or further includes a MIC (microphone) pin. In one implementation, the physical connector a may use an audio socket (e.g., an audio male socket or an audio female socket) of the OMTP standard or the CTIA standard having a diameter of 3.5 mm. The signal input end of the analog audio-to-digital sampling circuit 12 is connected with the left channel interface and the right channel interface of the physical connector A; the signal output end of the analog audio-to-digital sampling circuit 12 is connected to the audio processing circuit 15, and the digital audio codec circuit 14 performs audio processing and coding compression processing on the target audio signal output by the audio processing circuit 15 to generate a wireless radio frequency signal, so that after different audio processing is performed on the wired analog audio signal, the wired analog audio signal is transmitted to the wireless earphone 100 through the wireless transceiver circuit 16 in a wireless communication manner to be played.

In one embodiment, the digital audio transport circuitry 112 includes a second audio interface connector and wired digital audio signal processing circuitry. Optionally, the wired digital audio signal processing circuit includes an electrostatic protection circuit and a second filter circuit, the electrostatic protection circuit is composed of an electrostatic diode, and the electrostatic protection circuit can lead instant high voltage into a power supply or a ground, so as to play a role in releasing high voltage and protecting a port, and prevent abnormal high voltage caused by circuit abnormality from damaging circuit components; the second filter circuit comprises an LC filter circuit consisting of an inductor and a capacitor and is used for attenuating and filtering electromagnetic interference in the input wired digital audio signal; the electrostatic protection and filtering noise reduction processing of the input wired digital audio signal are realized. Optionally, the second audio interface connector is a physical connector B, and the physical connector B may be directly or indirectly connected to a USB HOST interface (i.e. a USB HOST device interface) or a USB OTG interface (i.e. a USB plug and play interface) of the external audio device, so as to receive an audio signal sent by the external audio device in a digital manner in a USB bus communication manner or send the audio signal to the external audio device in a digital manner. In a specific implementation, the sound effect processing circuit 15 receives the wired digital audio signal transmitted by the physical connector B, and performs preset sound effect processing on the wired digital audio signal according to the audio control signal to generate a target audio signal. The digital audio codec circuit 14 performs audio processing and coding compression processing on the target audio signal output by the audio processing circuit 15 to generate a wireless radio frequency signal, so that after different audio processing is performed on the wired analog audio signal, the wired analog audio signal is sent to the wireless earphone 100 for playing through the wireless transceiver circuit 16 in a wireless communication manner. Optionally, the physical connector B may adopt one of a standard type _ C interface, a lighting USB interface, a Micro USB interface, a standard USB interface, an HDMI audio interface, or an optical fiber transmission audio interface as a transmission interface of the wired digital audio signal, so as to receive and transmit the wired digital audio signal output by the external audio device. The embodiment of the application can facilitate the user to access the audio signals output by different audio devices, and carry out required sound effect processing and reverberation processing on the audio signals, thereby outputting the audio signals to the wireless earphone for playing, improving the convenience and the practicability of a wired audio-to-wireless audio processing circuit, and improving the audio playing effect and audio experience of the wireless earphone.

Referring to fig. 4, in one embodiment, the wired audio to wireless audio processing circuit further includes: USB device control circuitry 20.

And the USB device control circuit 20 is connected with the audio transmission circuit 11 and the digital audio coding and decoding circuit 14 and is configured to receive the wired audio signal and generate a USB digital audio signal according to the wired audio signal.

In a specific implementation, the USB device control circuit 20 includes a USB device controller, the USB device control circuit 20 is connected to the digital audio transmission circuit 112 and the digital audio codec circuit 14, the USB device control circuit 20 receives the wired digital audio signal transmitted by the physical connector B in the digital audio transmission circuit 112, converts and processes the wired digital audio signal according to a communication protocol to generate a USB digital audio signal, the digital audio codec circuit 14 compresses and encodes the USB digital audio signal to generate a wireless radio frequency signal, transmits the wireless radio frequency signal to the wireless transceiver circuit 16, and sends the audio information to the wireless earphone 100 in a wireless communication manner to perform audio playing, so as to improve the accuracy and reliability of audio signal processing.

In one embodiment, the USB device control circuit 20 may further be connected to the audio processing circuit 15, the digital audio transmission circuit 112 and the digital audio codec circuit 14, and the audio processing circuit 15 performs preset audio processing such as echo audio processing, wet and dry audio processing, electric audio processing or sound beautification processing on the USB digital audio signal according to the audio control signal to generate a target audio signal correspondingly. The digital audio codec circuit 14 compresses and encodes the USB digital audio signal to generate a wireless radio frequency signal, transmits the wireless radio frequency signal to the wireless transceiver circuit 16, and sends audio information to the wireless earphone 100 in a wireless communication manner to play audio, so as to improve the accuracy and reliability of processing the audio signal and improve the audio processing effect.

Referring to fig. 5, in one embodiment, the wired audio to wireless audio processing circuit further includes: a sound pickup microphone circuit 18 and a digital audio-to-analog output circuit 19.

A pickup microphone circuit 18 connected to the analog audio-to-digital sampling circuit 12 and configured to pick up a sound signal to generate a pickup signal; the analog-to-digital sampling circuit 12 is further configured to generate a pickup digital audio signal from the pickup signal; the sound effect processing circuit 15 is also configured to perform preset sound effect processing on the pickup digital audio signal in accordance with the audio control signal to generate a target audio signal; and the digital audio-to-analog output circuit 19 is connected with the sound effect processing circuit 15 and the audio transmission circuit 11, and is configured to generate an analog audio output signal according to the target audio signal and output the analog audio output signal to the audio transmission circuit 11.

In particular implementations, pickup microphone circuitry 18 includes a microphone assembly, such as an analog microphone, to enable the collection of pickup external sound signals to generate pickup signals. The pickup microphone circuit 18 may further include a microphone input interface to input a pickup signal generated by an external microphone component collecting the pickup sound signal to the analog audio-to-digital sampling circuit 12. The analog audio-to-digital sampling circuit 12 generates a picked-up digital audio signal according to the picked-up signal and outputs the picked-up digital audio signal to the sound effect processing circuit 15, and the sound effect processing circuit 15 performs preset sound effect processing, such as dry and wet sound effect processing, on the picked-up digital audio signal according to the sound effect control signal to generate a target audio signal and outputs the target audio signal to the digital audio-to-analog output circuit 19. The digital audio-to-analog output circuit 19 performs digital-to-analog conversion processing on the target audio signal to generate an analog audio output signal. In specific implementation, the output end of the digital audio-to-analog output circuit 19 is connected to the MIC interface of the physical connector a or connected to the physical connector B, so as to transmit the analog audio output signal to the external audio device, thereby implementing the functions of recording and uploading the recording, uploading the recording to the external audio device connected by wired communication and storing the recording, and facilitating subsequent calling, such as playback and the like. The embodiment of the application can not only pick up the outside sound signal, but also can effectively input the picked-up audio signal (namely the pickup signal) and carry out preset sound effect processing and reverberation processing on the pickup signal, thereby improving the quality and effect of the audio obtained by recording and improving the practicability of a wired audio-to-wireless audio processing circuit.

In one embodiment, the sound pickup microphone circuit 18 may also adopt a digital microphone, the digital microphone collects a picked-up sound signal to generate a digital picked-up signal, the digital picked-up signal is transmitted to the sound effect processing circuit 15, the sound effect processing circuit 15 performs related sound effect processing on the digital sound signal to generate and output a target audio signal to the digital audio-to-analog conversion output circuit 19, the digital audio-to-analog conversion output circuit 19 performs digital-to-analog conversion processing on the target audio signal to generate an analog audio output signal, and the analog audio output signal is transmitted back to an external audio device through an MIC interface of the physical connector a of the audio transmission circuit 11 or is connected with the physical connector B, so as to finally realize functions of recording, recording uploading and recording playback.

Referring to fig. 6, in one embodiment, the wired to wireless audio processing circuit further includes: a key circuit 20.

A key circuit 20 connected to the audio control circuit 13 and configured to generate a key control signal according to a key operation; the key control signal is used for controlling the on-off, resetting, sound effect processing and reverberation processing of the wired audio-wireless audio processing circuit.

In a specific implementation, the key circuit 20 is a mechanical key or a touch key, a user operates the mechanical key or the touch key to generate a key control signal according to a sound effect application requirement, and the audio control circuit 13 generates an audio control signal according to the key control signal (i.e., an input control signal). The mechanical keys can be one or more, for example, the mechanical keys comprise a plurality of keys such as a startup and shutdown key, a sound effect key, a reverberation key and a storage box configuration key, or the mechanical keys are one key, and the key control functions such as startup and shutdown, reverberation, a sound effect and storage box configuration are respectively realized through the sequence and time of pressing the keys by a user. The audio control circuit 113 comprises an embedded processor for performing power-on, power-off and reset control on the wired audio-to-wireless audio processing circuit according to the key control signal, meanwhile, the reverberation processing or the preset sound effect processing of the audio signal is controlled according to the key control signal, for example when the embedded processor in the audio processing circuit 11 detects the sound effect key being pressed or bounced, the control sound effect processing circuit 15 performs corresponding preset sound effect processing on the input digital audio signal to generate and output a target audio signal, or when the embedded processor detects that the reverberation button has a pressed/bounced action, the audio processing reverberation circuit 17 is controlled to perform reverberation processing on the corresponding pre-stored recorded audio and digital audio signals (such as a first digital audio signal, a USB digital audio signal, a pickup digital audio signal, and the like) to generate a target audio signal and output the target audio signal. The target audio signal is compressed and encoded by the digital audio codec circuit 14 to generate a wireless rf signal, and the wireless rf signal is transmitted to the wireless headset 100 for playing in a wireless communication manner.

Referring to fig. 7, in one embodiment, the wired to wireless audio processing circuit further includes: an audio bus interface circuit 21.

An audio bus interface circuit 21 connected to the audio processing circuit 15 and the audio control circuit 13, and configured to transmit audio data signals; the digital audio codec circuit 14 is further configured to generate a wireless radio frequency signal from the audio data signal.

In a specific implementation, optionally, the audio bus interface circuit 21 includes an I2S audio bus interface connector, and is configured to extend and connect an external audio device that performs audio data transmission according to the I2S bus standard, and access an audio data signal output by the external audio device to the sound effect processing circuit 15 or output an audio data signal to the external audio device according to a bus transceiving control signal generated by the audio control circuit 13. The audio control circuit 13 may generate a bus transceiving control signal to control receiving or sending of the audio data signal according to detecting that the audio bus interface circuit 21 accesses the external device and the audio transmission circuit 11 does not access the external audio device. The sound effect processing circuit 15 may perform preset sound effect processing on the audio data signal according to the audio control signal to generate a target audio signal. Digital audio codec circuit 14 carries out analog-to-digital conversion processing and compression coding processing etc. to audio data signal to generate wireless radio frequency signal, sends the audio frequency to wireless earphone 100 through wireless communication mode and plays, makes wired audio frequency change wireless audio frequency processing circuit can convenient expansion connect the audio equipment of different grade type, satisfies user's audio frequency processing and application demand, has improved wired audio frequency and has changeed wireless audio frequency processing circuit's compatibility and functional expansibility.

Referring to fig. 7, in one embodiment, the wired to wireless audio processing circuit further includes: the charge management circuit 22.

And the charging management circuit 22 is connected with the audio control circuit 13 and configured to generate a charging signal to charge the wireless headset 100 according to the power supply voltage signal which is accessed into the wireless headset 100 and input, and generate a power supply signal to supply power.

In a specific implementation, when the charging management circuit 22 detects that the wireless earphone 100 is placed in the earphone storage box, the charging management circuit can generate a wireless charging signal according to an input power supply voltage signal to charge the earphone, and simultaneously generate and send a feedback signal to the audio control circuit 13, so that the audio control circuit 13 controls the digital audio codec circuit 14 to stop generating a wireless radio frequency signal, and the wireless communication connection with the wireless earphone 100 is cut off; when the charging management circuit 22 detects that the wireless earphone 100 is not placed in the earphone containing box, the wireless charging signal is stopped being generated, and simultaneously, the wake-up signal is generated so that the audio control circuit 13 controls the digital audio codec circuit 14 to generate the wireless radio frequency signal, the wireless communication connection with the wireless earphone 100 is started, and the charging control of the wireless earphone 100 and the control of the wireless communication with the earphone are realized. Meanwhile, in the charging process of the wireless earphone, the audio control circuit 13 can control the sound pickup processing circuit 15 and the audio reverberation processing circuit 17 to perform preset sound effect processing or audio reverberation processing on the pickup signals generated by the microphone pickup sound signals, so that functions of recording, recording uploading, audio playback and the like are realized, energy consumption is saved, the wired audio-to-wireless audio processing circuit can stably and reliably process the audio, and the practicability of the wired audio-to-wireless audio processing circuit is further improved.

In a specific implementation, the analog-to-digital audio sampling circuit 12, the digital audio codec circuit 14, and the audio control circuit 13 may be all or individually integrated and packaged in one chip. When the analog-to-digital audio sampling circuit 12, the digital audio codec circuit 14 and the audio control circuit 13 are integrated in one chip, it can be understood that the analog-to-digital audio sampling circuit 12, the digital audio codec circuit 14 and the audio control circuit 13 form an audio processing circuit. Referring to fig. 8, in one embodiment, the audio processing circuit includes a microprocessor U1, wherein a positive phase digital audio terminal HSDP of the microprocessor U1 and a negative phase digital audio terminal HSDM of the microprocessor U1 are connected to the digital audio transmission circuit 112, a right channel digital audio output terminal AOUTR of the microprocessor U1 and a left channel digital audio output terminal AOUTL of the microprocessor U1 are connected to the digital audio-to-analog output circuit 19, a right channel microphone terminal MICNR of the microprocessor U1 and a left channel microphone terminal MICNL of the microprocessor U1 are connected to the sound pickup microphone circuit 18, a right channel analog audio terminal AUX0R of the microprocessor U1 and a left channel analog audio terminal AUX0L of the microprocessor U1 are connected to the analog audio transmission circuit 111, a wake-up terminal WIO0 of the microprocessor U1 and a switch terminal ONOFF of the microprocessor U1 are connected to the key circuit 19, a transmit-receive terminal TRX of the microprocessor U1 is connected to the radio transceiver circuit 16, the first data input/output terminal GPIO2 of the microprocessor U1 and the second data input/output terminal GPIO3 of the microprocessor U1 are commonly connected to the charging management circuit 22, and the third data input/output terminal GPIO7 of the microprocessor U1, the fourth data input/output terminal GPIO32 of the microprocessor U1, the fifth data input/output terminal GPIO33 of the microprocessor U1, the sixth data input/output terminal GPIO34 of the microprocessor U1, and the seventh data input/output terminal GPIO35 of the microprocessor U1 are commonly connected to the audio bus interface circuit 21.

In specific implementation, the audio bus interface circuit 21 is an I2S bus audio interface circuit, and may be connected to external audio devices that communicate according to an I2S bus communication protocol in an extensible manner, so as to transmit audio data signals sent by the external audio devices to the microprocessor U1 for sound effect processing, audio reverberation processing, compression coding processing, and the like, so as to generate and output radio frequency signals to the wireless transceiver circuit 16, and send the audio to the wireless headset 100 through the wireless transceiver circuit 16 for playing. The user operates the mechanical keys or touch keys in the key circuit 19, so that the microprocessor U1 can control the wired audio-to-wireless audio processing circuit to realize the functions of on/off, reset, sound recording effect processing, audio reverberation processing and the like.

Referring to fig. 9, in one embodiment, the analog audio transmission circuit 111 includes a connector J1 and a first fet Q1; the first pin terminal 1 of the connector J1, the second pin terminal 5 of the connector J1, the third pin terminal 3 of the connector J1, and the gate of the first fet Q1 are connected to the analog-to-digital sampling circuit 12, the drain of the first fet Q1 is connected to the fourth pin terminal 2 of the connector J1, and the source of the first fet Q1 is connected to the power ground.

In a specific implementation, the first pin terminal 1 of the connector J1 is connected to the first terminal of the first resistor R1 and the first anode terminal of the first electrostatic diode E1, the second terminal of the first resistor R1 is connected to the analog audio-to-digital sampling circuit 12, the second anode terminal of the first electrostatic diode E1 is connected to the power ground, the second pin terminal 5 of the connector J1 is connected to the first terminal of the second resistor R2 and the first anode terminal of the second electrostatic diode E2, the second terminal of the second resistor R2 and the first terminal of the fourth resistor R4 are connected to the first terminal of the first capacitor C1, the second terminal of the first capacitor C1 is connected to the analog audio-to-digital sampling circuit 12, the third pin terminal 3 of the connector J1 is connected to the first terminal of the third resistor R3 and the first anode terminal of the third electrostatic diode E3, the first terminal of the third resistor R3 is connected to the first terminal of the fifth resistor R5 and the second terminal of the capacitor 2, a second end of the second capacitor C2 is connected to the analog-to-digital sampling circuit 12, a second anode end of the third electrostatic diode E3 and a second anode end of the second electrostatic diode E2 are connected to the power ground, and a second end of the fourth resistor R4 and a second end of the fifth resistor R5 are connected to the power ground; the gate of the first fet Q1 is connected in series with the seventh resistor R7 and then connected to the analog-to-digital sampling circuit 12, and the source of the first fet Q1 is connected in series with the first inductor L1 and then connected to the power ground. An electrostatic protection circuit is formed by the second electrostatic diode E2 and the third electrostatic diode E3 so as to carry out electrostatic protection on the wired analog audio signal transmitted by the connector J1; the first filter circuit formed by the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the first capacitor C1 and the second capacitor C2 is used for filtering and denoising the input wired analog audio signal, so as to attenuate and filter electromagnetic interference in the wired analog audio signal, improve the precision of the input wired analog audio signal, and improve the stability and reliability of audio processing of the analog audio-to-digital sampling circuit 12.

Referring to fig. 10, in one embodiment, the digital audio transmission circuit 112 includes a USB connector J2 for receiving and transmitting the wired digital audio signal output by the external audio device to the digital audio codec circuit 14. In specific implementation, the electrostatic diode E01, the electrostatic diode E02, and the electrostatic diode E03 together form an electrostatic protection circuit in the digital audio transmission circuit 112, and the second inductor L2, the capacitor C01, the capacitor C02, the capacitor C03, and the capacitor C04 together form a second filter circuit, so as to perform filtering and noise reduction processing on the supply voltage signal DC5V of the USB connector J2 and the transmitted wired digital audio signal, so as to attenuate and filter electromagnetic interference in the wired digital audio signal, and improve the accuracy of the input wired digital audio signal, thereby improving the stability and reliability of audio processing performed by the audio processing circuit 12.

A second aspect of the present application provides an earphone receiver, the earphone receiver includes: the box body 01, the key 1, the cover part 3, the battery power supply 7 and the wired audio-wireless audio processing circuit are arranged; the key 1 is arranged on the box body 01, and the cover part 3 is covered with the box body 01 to accommodate the battery power supply 7 and the wired audio-to-wireless audio processing circuit in the box body.

In specific implementation, please refer to fig. 11 to 13, and fig. 11 to 13 show a schematic structural diagram of an earphone storage box according to an embodiment of the present application, wherein 01 is a box body; 1 is a key; 2 is an indicator light; 3 is a cover component; 4, an earphone accommodating chamber; 101 is a left earphone; 102 is a right earphone; 51. 52 and 53 are type _ C interfaces; 61 is a 3.5mm audio interface; 7 is a battery power supply; 8 is an antenna; 9 is Microphone (MIC); 001 is a first PCB board; and 002 is a second PCB board. The wireless headset 100 includes a left headset 101 and a right headset 102, and the headset housing compartment 4 is used to house the left headset 101 and the right headset 102 and can charge the wireless headset 100 through the battery power supply 7 and the charge management circuit 22. Optionally, each component circuit in the wired audio to wireless audio processing circuit is integrated on the first PCB 001 and the second PCB 002. The antenna 8 is an onboard antenna, and is disposed on the first PCB 001 to transmit a radio frequency signal, so as to realize wireless communication with the wireless headset 100. The key 1 is a mechanical key or a touch key, is installed on the surface of the box body 01 of the earphone containing box and can be touched from the outside, so that the on/off, reset, audio processing, audio mixing processing and the like of the wired audio-wireless audio processing circuit in the earphone containing box are controlled. A Microphone (MIC) is a built-in microphone capable of picking up an external sound signal and playing an output audio signal.

In one embodiment, the box 01 is further provided with an indicator light. Optionally, the indicator light is connected to the audio control circuit 13 in the processing circuit for converting wired audio into wireless audio, so as to indicate the charging state of the wireless headset 100, the wireless pairing state, the audio processing state of the headset storage box, and the like, so that the user can visually know the charging state and the wireless pairing state.

In one embodiment, the box body 01 of the earphone storage box is also correspondingly provided with an audio transmission interface for connecting external audio equipment.

In specific implementation, the audio transmission interface arranged on the box 01 corresponds to the audio interface connector in the audio transmission circuit 11, and the optional audio transmission interface includes at least one of a type _ C interface and a 3.5mm audio interface, for example, the box 01 shown in fig. 12 is provided with a type _ C interface 51 and a 3.5mm audio interface 61 for accessing an external audio device or an external microphone assembly; or as shown in fig. 13, the box 01 is provided with a type _ C interface 52 and a type _ C interface 52 for accessing an external audio device, so as to transmit an audio signal output by the external audio device to a wired audio to wireless audio processing circuit in the earphone storage box for performing required audio and sound effect processing, and further outputting a required audio effect. Optionally, the cover member 3 is a cap, and can perform dust protection, water protection and the like on the audio transmission interface and the like arranged on the box body.

The earphone storage box disclosed by the embodiment of the application can be used for storing and charging a wireless earphone, can also be used for carrying out preset sound effect processing and audio reverberation processing on an audio signal input in a wired communication mode and a pickup signal generated by pickup sound of a microphone so as to obtain a required audio effect, and uploading the processed recording audio to audio equipment to realize recording uploading, so that subsequent calling, such as playback and the like, is convenient, the earphone storage box is rich in functions, gets rid of wired constraint and is convenient to carry, the entertainment comfort and the audio effect are improved, and the requirement of a user on higher audio effect is met; and the earphone receiver can be used as audio processing equipment, dependence on external audio processing equipment (such as an external sound card) is reduced, and reliability, convenience and practicability of the earphone receiver are improved.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the functional units, modules and circuits described above are illustrated as being divided into different functional units, modules and circuits, and in practical applications, the functions may be divided into different functional units, modules and circuits according to different requirements, that is, the internal structure of the device may be divided into different functional units, modules or circuits to complete all or part of the functions described above. In the embodiments, each functional unit, module, and circuit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units, modules and circuits are only used for distinguishing one from another, and are not used for limiting the protection scope of the present application.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. The utility model provides a wired audio changes wireless audio processing circuit, sets up in the earphone containing box, carries out wireless communication with wireless earphone and is connected, its characterized in that, wired audio changes wireless audio processing circuit and includes:

an audio transmission circuit configured to transmit a wired audio signal;

2. The wired-to-wireless audio processing circuit of claim 1, further comprising:

3. The wired-to-wireless audio processing circuit of claim 1, wherein the audio transmission circuit comprises:

4. The wired-to-wireless audio processing circuit of claim 1, further comprising:

5. The wired-to-wireless audio processing circuit of claim 1, further comprising:

6. The wired-to-wireless audio processing circuit of claim 1, further comprising:

7. The wired-to-wireless audio processing circuit of claim 1, further comprising:

8. The wired-to-wireless audio processing circuit of claim 2, wherein the audio reverberation processing circuit employs a sound card chip.

9. An earphone storage case, comprising: a box, a key, a cover, a battery power supply and a wired audio-to-wireless audio processing circuit according to any one of claims 1 to 8; the cover part and the box body cover and are used for accommodating the battery power supply and the wired audio-to-wireless audio processing circuit in the box body.

10. The earphone storage case of claim 9 wherein the case body is further provided with an audio transmission interface; the audio transmission interface is used for accessing external audio equipment.