CN114554351A - Audio transmission circuit, audio transmission method and electronic equipment - Google Patents
Audio transmission circuit, audio transmission method and electronic equipment Download PDFInfo
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- CN114554351A CN114554351A CN202210109618.6A CN202210109618A CN114554351A CN 114554351 A CN114554351 A CN 114554351A CN 202210109618 A CN202210109618 A CN 202210109618A CN 114554351 A CN114554351 A CN 114554351A
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- 238000000034 method Methods 0.000 title claims abstract description 19
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- 238000001125 extrusion Methods 0.000 description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1008—Earpieces of the supra-aural or circum-aural type
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Abstract
The present disclosure relates to an audio transmission circuit, an audio transmission method, and an electronic device. The audio transmission circuit includes: the device comprises an audio processing module, a loudspeaker and a connector, wherein the output end of the audio processing module is connected to the loudspeaker and the connector; the audio processing module is used for outputting first audio data to the loudspeaker through a first path and outputting the first audio data to the connector through a second path; the connector is used for inputting second audio data and outputting the first audio data; the loudspeaker is used for playing the first audio data and the second audio data, wherein the first audio data are audio data received by the audio processing module through a Bluetooth channel, and the second audio data are audio data received by the connector through a data line.
Description
Technical Field
The disclosed embodiments relate to the field of audio transmission technologies, and in particular, to an audio transmission circuit, an audio transmission method, and an electronic device.
Background
With the popularization of bluetooth headsets, the bluetooth headset is very comfortable to wear and has a good sense of immersion based on the advantages of the tone quality and the duration of a journey of the bluetooth headset and the design of the full-package ear, and occupies a very important position in the market.
However, due to the wearing structure characteristics of the bluetooth headset, when a user listens to interesting audio and wants to share the audio with a friend, the user only needs to take off the bluetooth headset and wear the bluetooth headset to share the audio with the friend, which is very inconvenient.
Disclosure of Invention
An object of the embodiments of the present disclosure is to provide a new technical solution of an audio transmission circuit, an audio transmission method, and an electronic device.
According to a first aspect of the present disclosure, there is provided an audio transmission circuit comprising: the device comprises an audio processing module, a loudspeaker and a connector, wherein the output end of the audio processing module is connected to the loudspeaker and the connector; the audio processing module is used for outputting first audio data to the loudspeaker through a first path and outputting the first audio data to the connector through a second path; the connector is used for inputting second audio data and outputting the first audio data; the loudspeaker is used for playing the first audio data and the second audio data; the first audio data are audio data received by the audio processing module through a Bluetooth channel, and the second audio data are audio data received by the connector through a data line.
Optionally, the connector includes a first pin, a second pin, a third pin, a fourth pin, and a fifth pin for connecting the speaker, where the first pin is grounded and the first pin is connected to the fifth pin; the second pin and the fourth pin are used for connecting a left channel signal end of the loudspeaker; the third pin and the fifth pin are used for connecting a right channel signal end of the loudspeaker.
Optionally, an insulating block is disposed on a side of the fourth pin adjacent to the third pin, and the insulating block is used for isolating the electrical connection between the third pin and the fourth pin.
Optionally, the length of the second pin is smaller than that of the third pin, the length of the third pin is greater than that of the fourth pin, the third pin and the fourth pin are deformable pins, and the fifth pin has a contact portion facing the fourth pin.
Optionally, the second pin is connected to a left channel positive signal end of the speaker, the third pin is connected to a right channel positive signal end of the speaker, the fourth pin is connected to a left channel negative signal end of the speaker, and the fifth pin is connected to a right channel negative signal end of the speaker.
Optionally, a matching resistor is disposed between each of the left channel positive signal end, the right channel positive signal end, the left channel negative signal end, the right channel negative signal end, and the corresponding connector pin.
Optionally, the audio processing module is provided with an amplifier module, and the amplifier module is provided with an amplifier corresponding to each sound channel signal end of the speaker.
According to a second aspect of the present disclosure, there is provided an audio transmission method applied to the audio transmission circuit of the first aspect, in a case where an external earphone is connected to the connector, a fourth pin and a fifth pin of the connector are contacted, the method including: outputting first audio data to the connector and the loudspeaker through the audio processing module, wherein the first audio data is audio data received by the audio processing module through a Bluetooth channel; forming a data transmission loop with the external earphone through the connector, and outputting the first audio data to the external earphone; outputting the first audio data through the speaker and the external earphone.
Optionally, in a case where an audio terminal is connected to the connector, the fourth pin and the fifth pin of the connector are contacted, and the method includes: receiving second audio data output by the audio terminal through a data line through the connector, and outputting the second audio data to the loudspeaker; outputting the second audio data through the speaker.
According to a third aspect of the present disclosure, there is provided an electronic device comprising: the audio transmission circuit comprises a shell and an audio transmission circuit arranged in the shell, wherein the audio transmission circuit is the audio transmission circuit in any one of the first aspect.
One beneficial effect of the disclosed embodiment is that the compatibility of audio input and output of the bluetooth headset is realized through the connector and the internal pin structure thereof, audio sharing is realized, the circuit is simple to realize, the cost is low, and meanwhile, the audio can still be listened by using the bluetooth headset under the condition that the electric quantity of the headset is insufficient.
Other features of embodiments of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the embodiments of the disclosure.
FIG. 1 is a schematic diagram of an audio transmission circuit according to an embodiment of the invention;
FIG. 2 is a schematic diagram of internal pins of a connector according to one embodiment;
FIG. 3 is a block schematic diagram of an electronic device according to one embodiment.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
One application scenario of the embodiments of the present disclosure is an audio data transmission scenario of a bluetooth headset.
In one example, the audio output mode of the existing bluetooth headset is that the bluetooth headset receives audio data sent by a terminal device, such as a mobile phone, through a bluetooth transmission module, such as a bluetooth AP gateway, and then outputs the audio data to a speaker through an internal amplifier after processing an audio signal.
Because bluetooth headset's wearing structural feature, listen to interesting audio frequency when the user, when wanting to share for friend, can only take off bluetooth headset, let friend wear just can share audio frequency for friend and listen, very inconvenient.
In view of the technical problems of the above embodiments, the inventor proposes an audio transmission circuit, an audio transmission method and an electronic device. By providing a new connector of the Bluetooth headset, the compatibility of audio sharing and audio receiving of the Bluetooth headset is realized.
Referring to fig. 1, the present embodiment provides an audio transmission circuit including: an audio processing module 101, a speaker 102 and a connector 103, an output of the audio processing module 101 being connected to the speaker 102 and the connector 103.
In this embodiment, the speaker is connected to the connector through a line, an output end of the audio processing module is connected to a line between the speaker and the connector, the first path is a connection line between the audio processing module and the speaker, and the second path is a connection line between the audio processing module and the connector.
In this embodiment, the audio processing module 101 is provided with an amplifier module 104, and the amplifier module 104 is provided with an amplifier corresponding to each channel signal end of the speaker 102. The sound channel signal end of the loudspeaker comprises a left sound channel positive signal end, a right sound channel positive signal end, a left sound channel negative signal end and a right sound channel negative signal end. For example, the amplifier module comprises a first amplifier, a second amplifier, a third amplifier and a fourth amplifier, and four output ends of the first amplifier, the second amplifier, the third amplifier and the fourth amplifier are respectively connected to a left channel positive signal end L +, a right channel positive signal end R +, a left channel negative signal end L-, and a right channel negative signal end R-, so as to process and amplify the first audio data.
In this embodiment, a matching resistor 106 is disposed between the left channel positive signal terminal L +, the right channel positive signal terminal R +, the left channel negative signal terminal L-, the right channel negative signal terminal R-and the corresponding connector pin for impedance matching, so that the audio processing module or the connector has the same characteristic impedance as the connected transmission line and has the same phase, so that the circuit is more stable.
It should be noted that, in the existing audio transmission circuit, an amplifier is disposed between the audio processing module of the bluetooth headset and the connector, and is configured to convert the first audio data from the differential signal to the single-ended signal, and output the single-ended signal to the connector, which is relatively expensive in circuit cost.
The output end of the audio processing module is directly connected to the connector, the audio data are processed through the amplifier module of the audio processing module, the utilization efficiency of the audio processing module is improved, and the audio output and the audio input of the head-wearing Bluetooth headset can be simultaneously realized.
In this embodiment, the connector is used for inputting the second audio data and outputting the first audio data. The first audio data are audio data received by the audio processing module through a Bluetooth channel, the second audio data are audio data which are transmitted by the audio terminal through the connecting line and are accessed into the connector, and the audio terminal can be an intelligent terminal such as a mobile phone and a tablet personal computer.
In this embodiment, the speaker is configured to play the first audio data after receiving the first audio data, and play the second audio data after receiving the second audio data.
In this embodiment, referring to fig. 2, the connector includes a first pin 1, a second pin 2, a third pin 3, a fourth pin 4, and a fifth pin 5 for connecting the speaker, where the first pin 1 is grounded, and the first pin 1 is connected to the fifth pin 5; the second pin 2 and the fourth pin 4 are used for connecting a left channel signal end of the loudspeaker; the third pin 3 and the fifth pin 5 are used for switching on a right channel signal end of the loudspeaker.
In this embodiment, the second pin 2 is connected to the left channel positive signal end of the speaker, the third pin 3 is connected to the right channel positive signal end of the speaker, the fourth pin 4 is connected to the left channel negative signal end of the speaker, and the fifth pin 5 is connected to the right channel negative signal end of the speaker.
The fourth pin 4 has an isolation function, one side of the fourth pin 4, which is adjacent to the third pin 3, is provided with an insulating block 105, and the insulating block 105 is used for isolating the electrical connection between the third pin 3 and the fourth pin 4, so that the situation that the right channel positive signal end and the left channel negative signal end are connected to affect the circuit signal transmission can be avoided under the condition that the connector is connected with an external earphone or an audio terminal.
Specifically, the length of the second pin 2 is smaller than that of the third pin 3, so that the plug of an external earphone or an audio terminal can act on the third pin 3 when being connected into the connector.
In this embodiment, the length of the third pin 3 is greater than the length of the fourth pin 4, the third pin 3 and the fourth pin 4 are deformable pins, and the fifth pin 5 has a contact portion 107 facing the fourth pin 4.
The following explains the working principle of the audio transmission circuit of this embodiment, taking the audio transmission circuit of this embodiment disposed in a bluetooth headset as an example:
under the condition that the connector is connected with an external earphone, the third pin of the connector can deform under the extrusion of an external earphone plug, and an insulator is arranged between the third pin and the fourth pin, so that the insulator can be driven to extrude the fourth pin to deform, the fourth pin is in contact connection with the fifth pin after deforming, the fifth pin is connected with the first pin, and the first pin, the fourth pin and the fifth pin are equipotential at the moment to form a public pin, so that the differential signal can be changed into a single-ended signal. At this moment, if the audio processing module receives the first audio data, the audio processing module sends the first audio data to the connector, and the connector sends the first audio signal to the external earphone to form an audio signal loop, so that the sound is produced through the external earphone. Simultaneously, audio frequency processing module sends first audio data to bluetooth headset's speaker, and first audio data is broadcast to the speaker, realizes the scene that outside earphone and bluetooth headset sent audio frequency simultaneously to only need just can realize sharing bluetooth headset's audio frequency to outside earphone through wired earphone.
Under the condition that the connector is connected with an audio terminal, a third pin of the connector can deform under the extrusion of an audio terminal plug, and an insulator is arranged between the third pin and a fourth pin, so that the insulator can be driven to extrude the fourth pin to deform, the fourth pin is in contact connection with a fifth pin after being deformed, the fifth pin is connected with the first pin, and the first pin, the fourth pin and the fifth pin are equipotential at the moment to form a public pin. The audio terminal, the connector and the loudspeaker form a data transmission loop, and at the moment, if the audio terminal sends second audio data to the connector, the second audio data can be played through the loudspeaker. Therefore, a data input scene of the head-wearing Bluetooth headset can be realized. Under the scene, the function of continuously playing the audio under the condition that the electric quantity of the headset is exhausted can be met.
The audio transmission circuit provided by the embodiment can realize the compatibility of audio input and output of the bluetooth headset, realize audio sharing, and has the advantages of simple circuit realization and low cost, and meanwhile, the bluetooth headset can still be used for listening to audio under the condition that the electric quantity of the headset is insufficient.
The present embodiment provides an audio transmission method, applied to the audio transmission circuit of the above embodiment, in a case where an external earphone is connected to a connector, a fourth pin and a fifth pin of the connector are in contact, the method including: outputting first audio data to the connector and the loudspeaker through the audio processing module; forming a data transmission loop with an external earphone through the connector, and outputting first audio data to the external earphone; and outputting first audio data through a loudspeaker and an external earphone, wherein the first audio data is audio data received by the audio processing module through a Bluetooth channel.
In one embodiment, when the connector is connected with an external earphone, the third pin of the connector deforms under the extrusion of an external earphone plug, and an insulator is arranged between the third pin and the fourth pin, so that the insulator is driven to extrude the fourth pin to deform, the fourth pin deforms and then is in contact connection with the fifth pin, the fifth pin is connected to the first pin, and at the moment, the first pin, the fourth pin and the fifth pin are equipotential, a common pin is formed, and the differential signal is changed into a single-ended signal. At this moment, if the audio processing module receives the first audio data, the audio processing module sends the first audio data to the connector, and the connector sends the first audio signal to the external earphone to form an audio signal loop, so that the sound is produced through the external earphone. Simultaneously, audio processing module sends first audio data to bluetooth headset's speaker, and first audio data is broadcast to the speaker, realizes that outside earphone and bluetooth headset send the scene of audio frequency simultaneously to only need just can realize sharing bluetooth headset's audio frequency to outside earphone through wired earphone.
In this embodiment, when the connector is connected to an audio terminal, the fourth pin and the fifth pin of the connector are in contact with each other, and the method of this embodiment includes: receiving second audio data output by the audio terminal through the data line through the connector, and outputting the second audio data to the loudspeaker; the second audio data is output through the speaker.
In one example, when the connector is connected with an audio terminal, the third pin of the connector deforms under the extrusion of the plug of the audio terminal, and an insulator is arranged between the third pin and the fourth pin, so that the insulator is driven to extrude the fourth pin to deform, the fourth pin deforms and then is in contact connection with the fifth pin, the fifth pin is connected to the first pin, and at the moment, the first pin, the fourth pin and the fifth pin are equipotential, and a common pin is formed. The audio terminal, the connector and the loudspeaker form a data transmission loop, and at the moment, if the audio terminal sends second audio data to the connector, the second audio data can be played through the loudspeaker. Therefore, a data input scene of the head-wearing Bluetooth headset can be realized. Under the scene, the function of continuously playing the audio under the condition that the electric quantity of the headset is exhausted can be met.
The audio transmission circuit provided by the embodiment can realize the compatibility of audio input and output of the Bluetooth headset, realize audio sharing, has simple circuit realization and low cost, and can still use the Bluetooth headset to listen to audio under the condition that the electric quantity of the headset is insufficient.
The present embodiment further provides an electronic device, and referring to fig. 3, the electronic device includes: a housing 301, and an audio transmission circuit 302 disposed in the housing, the audio transmission circuit 302 being the audio transmission circuit shown in fig. 1.
The audio transmission circuit includes: the device comprises an audio processing module, a loudspeaker and a connector, wherein the output end of the audio processing module is connected to the loudspeaker and the connector; the audio processing module is used for outputting first audio data to the loudspeaker through a first path and outputting the first audio data to the connector through a second path; the connector is used for inputting second audio data and outputting the first audio data; the speaker is configured to play the first audio data and the second audio data.
The structure and function of the audio transmission circuit are described in the above embodiments, and are not described herein again. The electronic device of this embodiment may be a bluetooth headset, and may also be other bluetooth devices such as a bluetooth speaker.
While embodiments of the present invention have been described above, the above description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the invention is defined by the appended claims.
Claims (10)
1. An audio transmission circuit, comprising: the device comprises an audio processing module, a loudspeaker and a connector, wherein the output end of the audio processing module is connected to the loudspeaker and the connector;
the audio processing module is used for outputting first audio data to the loudspeaker through a first path and outputting the first audio data to the connector through a second path;
the connector is used for inputting second audio data and outputting the first audio data;
the loudspeaker is used for playing the first audio data and the second audio data;
the first audio data are audio data received by the audio processing module through a Bluetooth channel, and the second audio data are audio data received by the connector through a data line.
2. The audio transmission circuit of claim 1, wherein the connector comprises a first pin, a second pin, a third pin, a fourth pin, and a fifth pin to which the speaker is connected, wherein the first pin is connected to ground and the first pin is connected to the fifth pin;
the second pin and the fourth pin are used for connecting a left channel signal end of the loudspeaker;
the third pin and the fifth pin are used for connecting a right channel signal end of the loudspeaker.
3. The audio transmission circuit of claim 2, wherein a side of the fourth pin adjacent to the third pin is provided with an insulating block for isolating an electrical connection between the third pin and the fourth pin.
4. The audio transmission circuit of claim 2, wherein the length of the second pin is less than the length of the third pin, the length of the third pin is greater than the length of the fourth pin, the third pin and the fourth pin are deformable pins, and the fifth pin has a contact portion facing the fourth pin.
5. The audio transmission circuit according to claim 2, wherein the second pin is connected to a left channel positive signal terminal of the speaker, the third pin is connected to a right channel positive signal terminal of the speaker, the fourth pin is connected to a left channel negative signal terminal of the speaker, and the fifth pin is connected to a right channel negative signal terminal of the speaker.
6. The audio transmission circuit according to claim 5, wherein a matching resistor is disposed between each of the left channel positive signal terminal, the right channel positive signal terminal, the left channel negative signal terminal, the right channel negative signal terminal and the corresponding connector pin.
7. The audio transmission circuit according to claim 1, wherein the audio processing module is provided with an amplifier module, and the amplifier module is provided with an amplifier corresponding to each channel signal end of the speaker.
8. An audio transmission method applied to the audio transmission circuit according to any one of claims 1 to 7, wherein in a case where an external earphone is connected to the connector, a fourth pin and a fifth pin of the connector are contacted, the method comprising:
outputting first audio data to the connector and the loudspeaker through the audio processing module, wherein the first audio data is audio data received by the audio processing module through a Bluetooth channel;
forming a data transmission loop with the external earphone through the connector, and outputting the first audio data to the external earphone;
outputting the first audio data through the speaker and the external earphone.
9. The method of claim 8, wherein the fourth pin and the fifth pin of the connector are contacted in a case where an audio terminal is connected to the connector, the method comprising:
receiving second audio data output by the audio terminal through a data line through the connector, and outputting the second audio data to the loudspeaker;
outputting the second audio data through the speaker.
10. An electronic device, comprising: a housing, and an audio transmission circuit disposed within the housing, the audio transmission circuit being as claimed in any one of claims 1-7.
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| CN202210109618.6A CN114554351B (en) | 2022-01-28 | 2022-01-28 | Audio transmission circuit, audio transmission method and electronic equipment |
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| CN202210109618.6A CN114554351B (en) | 2022-01-28 | 2022-01-28 | Audio transmission circuit, audio transmission method and electronic equipment |
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| US20130279725A1 (en) * | 2012-04-18 | 2013-10-24 | Dong-Liang Ren | Headphone detection circuit and electronic device with headphone detection circuit |
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