Method, system and earphone terminal for switching earphone channels

Abstract

The embodiment of the application discloses a method, system and earphone terminal for switching an earphone channel, which can accurately identify and judge the left and right ear wearing conditions of the earphone terminal, accurately send left and right channel input audio signals, and does not need a user to manually switch the left and right channels of the earphone terminal, thereby greatly improving the use convenience of the earphone terminal.

Description

[0001] The present application relates to the earphone technical field, especially relates to a kind of switching earphone sound channel method, system and earphone terminal.

BACKGROUND

[0002] With the popularity of mobile terminal, more and more people like to use mobile terminal to listen to music and watch video, in order to ensure good audio-visual experience, many users will use earphone to listen to audio.In order to improve the listening experience of earphone, by designing different sound channels of earphone, can make user hear stereo audio.

[0003] Stereo earphone has left earphone and right earphone, wherein left earphone fixedly outputs left sound channel, and right earphone fixedly outputs right sound channel.In prior art, since before user wears stereo earphone, it needs to artificially distinguish left and right earphone first, even left and right earphone may be worn reversely, which seriously affects the portability of earphone.In user market research, this feature is important negative public opinion.

[0004] In fact, when user listens to stereo sound, if left and right earphone are worn reversely, it will cause left and right sound channels to be opposite, that is, the listening experience of user is likely to be opposite to the real sound environment of music and video.Especially when watching video, if left and right sound channels are opposite, that is, left ear receives right sound channel audio, and right ear receives left sound channel audio, the action with direction on video screen and the coordinated audio will be opposite, which seriously reduces user experience.

[0005] In addition, user can only find that left and right earphone are worn reversely after having been worn reversely and heard audio, and can only manually switch left and right earphone to restore normal left and right sound channels, which also greatly affects the convenience of use.

[0006] ​In the prior art, Chinese patent CN106254993B discloses a method and device for adaptive control of left and right sound channels of earphones, wherein the method comprises: a terminal receiving a control signal sent by a target earphone, the target earphone comprising a loudspeaker and at least two pressure sensors, the control signal being generated by the pressure sensors of the target earphone when detecting the wearing position of the target earphone; the terminal determining the wearing position of the target earphone based on the control signal; the terminal detecting whether the first sound channel circuit of the terminal connected with the target earphone matches the wearing position of the target earphone; if not, switching the sound channel circuit of the terminal connected with the target earphone from the first sound channel circuit to the second sound channel circuit. The present application also discloses a corresponding device. The technical scheme provided by the present application can realize that the user does not need to distinguish between left and right sound channels before wearing the earphone, and no matter how the earphone is worn, the sound signals obtained by the left and right sound channels are always correct, thereby improving the hearing effect of the user. The disadvantage of this patent is that additional sensor devices (pressure sensors) are needed to identify the wearing position, which is not conducive to the weight reduction and miniaturization of the product, and will affect the wearing comfort of the product. On the other hand, the pressure sensor cannot ensure accurate identification of the wearing difference between the left and right ears.

[0007] In another prior art, Chinese patent CN104080028B discloses a recognition method, electronic device and earphone. The method is applied to an electronic device connected with an earphone, and comprises: when the earphone is worn on a user's ear, the electronic device obtains first biological feature information sent by the earphone for representing a first biological feature of the ear; and based on the first biological feature information, the electronic device identifies the correspondence between the first and second audio output units of the earphone and the left and right ears of the ear. Through this method, the electronic device can identify the correspondence between the first and second audio output units of the earphone and the left and right ears of the ear. The disadvantage of this patent is that additional sensor devices (temperature, biological, image sensors) are needed to identify the wearing position, which is not conducive to the weight reduction and miniaturization of the product, and will affect the wearing comfort of the product. On the other hand, temperature and biology cannot ensure accurate identification of the wearing difference between the left and right ears.

[0008] In another prior art, Chinese patent CN106358127A discloses a left and right sound channel switching method and a mobile terminal, and relates to the technical field of communication. The method comprises the following steps: receiving a control instruction sent by a headset according to a detection result of at least one sensor, wherein the sensor is arranged on the outer surface of the headset head, and the detection result is used to know whether the headset head is worn into the ear canal corresponding to the headset head; and according to the control instruction, the mobile terminal is controlled to switch the left sound channel audio signal and the right sound channel audio signal. The problems of being unable to automatically switch the left and right sound channel audio signals according to the wearing state of the headset, complicated operation and poor user experience are solved. The technical solution controls the mobile terminal to automatically switch the left and right sound channels according to the wearing state of the headset, without the need for the user to manually adjust the left and right headset heads, reduces manual operation, and thus improves the user's use experience. The disadvantage of the patent is that the electrical impedance is not sensitive to wearing, and different wearing methods (wearing on the left and right ears) are difficult to reflect the difference in impedance, so it is difficult to distinguish and identify the left and right ears.

[0009]

Application Content

[0010] Therefore, the embodiments of the present application provide a method and system for switching the sound channel of a headset and a headset terminal to solve the technical problem that the user can only manually operate to switch the left and right headsets in the prior art, which affects the convenience of using the headset.

[0011] In a first aspect, the embodiments of the present application provide a method for switching the sound channel of a headset, which comprises the following steps:

[0012] Receiving a sound channel detection signal from a sound generating device picked up by a pickup device in a headset terminal;

[0013] Processing the received sound channel detection signal to obtain feature information of a left headset and feature information of a right headset, respectively;

[0014] Comparing the feature information of the left headset with preset left sound channel feature information and comparing the feature information of the right headset with preset right sound channel feature information to obtain a comparison result;

[0015] When the comparison result is inconsistent, switching the left sound channel signal and the right sound channel signal and then outputting the correct left and right sound channel signals.

[0016] Through the scheme provided by the embodiments, whether the left headset and the right headset output the correct sound channel signal is identified based on the principle that the impedance characteristics of the ear canal-eardrum of the human ear affect the acoustic characteristics of the in-ear headset, so that the technical effect of being able to automatically switch the sound channel signal of the left headset and the right headset without the user operating the mobile terminal is achieved.

[0017] In a preferred embodiment, before the step of detecting the sound channel signal from the sound emitting device by the sound pickup device in the receiving earphone terminal, the following steps are further included:

[0018] The preset left sound channel characteristic information and the preset right sound channel characteristic information are determined.

[0019] Through the scheme provided by the embodiment, the preset left sound channel characteristic information and the preset right sound channel characteristic information are determined, so that each earphone terminal has a determined standard for distinguishing left and right sound channel signals when leaving the factory.

[0020] In a preferred embodiment, in the step of presetting the left sound channel characteristic information and the right sound channel characteristic information, the following steps are further included:

[0021] The left earphone is respectively worn on the left ear and the right ear, and the right earphone is respectively worn on the left ear and the right ear;

[0022] The sound emitting device emits a sound channel detection signal;

[0023] The sound pickup device receives the sound channel detection signal;

[0024] The sound channel detection signal is subjected to Fourier transform;

[0025] The preset left sound channel characteristic information and the preset right sound channel characteristic information are respectively obtained;

[0026] The preset left sound channel characteristic information and the preset right sound channel characteristic information are stored.

[0027] Through the scheme provided by the embodiment, the left sound channel characteristic information and the right sound channel characteristic information which are relatively accurate as a reference basis can be obtained, a certain segment of 1-10 kHz is taken as a frequency spectrum recognition characteristic, and after recognition, the high frequency spectrum effect is compensated to ensure the balance and sound quality of the left and right ears.

[0028] In a preferred embodiment, in the step of presetting the left sound channel characteristic information and the right sound channel characteristic information, the following steps are further included:

[0029] The user is reminded to correctly wear the left and right ears for the first time;

[0030] The sound emitting device emits a sound channel detection signal;

[0031] The sound pickup device receives the sound channel detection signal;

[0032] The sound pickup device processes the sound channel detection signal to obtain the preset left sound channel characteristic information and the preset right sound channel characteristic information;

[0033] The preset left sound channel characteristic information and the preset right sound channel characteristic information are stored.

[0034] Through the scheme provided in the embodiment, after first correct wearing, the user can not intentionally distinguish the left ear and the right ear, and after wearing, the earphone can automatically detect the characteristic information of the left ear and the right ear. If the characteristic information of the left ear and the right ear is consistent with the characteristic information in the first wearing, it can be judged that it is correctly worn, otherwise, the sound channel is automatically switched and then the correct audio signal is output to the left ear and the right ear.

[0035] In a preferred embodiment, before outputting the left sound channel signal and the right sound channel signal, the following steps are further included:

[0036] The left sound channel signal and the right sound channel signal to be output are respectively equalized and compensated.

[0037] Through the scheme provided in the embodiment, the balance and the sound quality of the audio signal of the left earphone and the right earphone after output can be ensured.

[0038] In a preferred embodiment, the frequency band of the preset left sound channel characteristic information and the right sound channel characteristic information is 1-10 kHz.

[0039] In a preferred embodiment, in the step of processing the received sound channel detection signal to obtain the characteristic information of the left earphone and the characteristic information of the right earphone, the signal processing is Fourier transform or time domain algorithm transform.

[0040] In a second aspect, the embodiment of the present application provides a system for switching sound channels of earphones, which comprises a receiving unit, a processing unit, a comparison unit, a switching unit and an output unit.

[0041] The receiving unit is configured to receive a sound channel detection signal from a sound generating device picked up by a sound pickup device in an earphone terminal.

[0042] The processing unit is configured to process the received sound channel detection signal to obtain the characteristic information of the left earphone and the characteristic information of the right earphone.

[0043] The comparison unit is configured to compare the characteristic information of the left earphone with preset left sound channel characteristic information, compare the characteristic information of the right earphone with preset right sound channel characteristic information, and obtain a comparison result.

[0044] The switching unit is configured to switch the left sound channel signal and the right sound channel signal when the comparison result is inconsistent.

[0045] The output unit is configured to output correct left sound channel signal and right sound channel signal.

[0046] Through the scheme provided in the embodiment, the left and right ear wearing conditions of the earphone terminal can be accurately identified and determined, and left and right sound channel input audio signals can be accurately sent, without the need for the user to manually switch the left and right sound channels of the earphone terminal, thereby greatly improving the use convenience of the earphone terminal.

[0047] In a preferred embodiment, the system further comprises a preset unit configured to preset the left sound channel characteristic information and the right sound channel characteristic information.

[0048] Through the scheme provided in the embodiment, the preset unit is configured to preset the determined preset left sound channel characteristic information and the right sound channel characteristic information, so that each earphone terminal has a determined criterion for determining left and right sound channel signals when leaving the factory.

[0049] In a third aspect, the embodiment of the present application provides an earphone terminal, comprising two earphones and the system for switching sound channels of the earphones according to any one of claims 6 to 8; and the system is installed in the earphones.

[0050] Through the scheme provided in the embodiment, the existing devices in the earphones can be used to accurately identify and determine the left and right ear wearing conditions of the stereo earphones, and left and right sound channel input audio signals can be accurately sent, without the need for the user to manually replace the earphones, thereby greatly improving the use convenience of the stereo earphones, without increasing hardware costs, and having a stable improvement effect and significant benefits.

[0051] In a preferred embodiment, the earphone comprises a front cavity part and a main body part, and the main body part is connected to the front cavity part.

[0052] The front cavity part comprises a front cavity and an ear sleeve, and the ear sleeve is sleeved outside the front cavity.

[0053] The main body part comprises a shell, a front cover plate, a sound emitting device, a sound pickup device and a processing device, the shell is connected to the front cavity, the front cover plate is arranged at the connection between the shell and the front cavity and seals the front end of the shell close to the front cavity, the sound emitting device, the sound pickup device and the processing device are all installed in the cavity of the shell enclosed by the front cover plate, the installation positions of the sound pickup devices in the two earphones are different, and the sound emitting device and the sound pickup device are electrically connected to the processing device.

[0054] Through the scheme provided in the embodiment, the sound pickup devices have different positions in the ear canal, and the high-frequency spectrum parts of the characteristic information collected by the sound pickup devices will have differences due to the changes in the load impedance of the front cavity part. At this time, there is a fixed frequency response difference between the left ear and the right ear to identify the left and right ears, which can help the earphone terminal to accurately identify and determine the left and right ear wearing conditions of the earphones, and accurately send left and right sound channel signals, without the need for the user to manually replace the earphones, thereby greatly improving the use convenience of the earphone terminal.

[0055] In a preferred embodiment, the earphone has a contour symmetrical about a symmetry plane, and the sound pickup device is located on one side of the symmetry plane of the earphone, and the distance between the sound pickup device and the symmetry plane is at least 2mm.

[0056] By the scheme provided in this embodiment, when worn on the left and right ears, the high-frequency spectrum part of the feature information collected by the sound pickup device will differ due to the asymmetry of the sound pickup device, and different feature information is obtained, thereby serving as a basis for identifying the left and right channel signals.

[0057] In a preferred embodiment, the front cavity part is asymmetrical about the symmetry plane, and the volume of the front cavity part is at least 0.2 cubic centimeters.

[0058] In a preferred embodiment, the front cavity part further comprises a tip extending from one side of the front cavity, and the contour of the tip is symmetrical about the symmetry plane.

[0059] By the scheme provided in this embodiment, it is just due to the asymmetrical structure of the front cavity part that when the same earphone is worn on the left and right ears, the front cavity part of the earphone will be above or below, respectively, and at this time, the tip deeply inserted into the ear canal will produce different ear canal impedances when coupled with the ear canal. When the left earphone and the right earphone are reversed, the high-frequency spectrum collected by the sound pickup device will differ due to the change of the load impedance of the front cavity part, and different feature information is obtained, thereby serving as a basis for identifying the left and right channel signals.

[0060] In a preferred embodiment, the sound generating device, the sound pickup device and the processing device are connected in the working circuit of the earphone terminal, wherein the processing device is respectively connected with a power supply, a memory, a radio frequency circuit, a Bluetooth module, a digital signal processor, a sensor and an input / output interface, the digital signal processor is connected with an audio circuit, and the sound generating device and the sound pickup device are connected on the audio circuit.

[0061] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, comprising a program or instructions, when the program or instructions run on a computer, the method as described in the first aspect is executed.

[0062] Compared with the prior art, the technical scheme has at least the following beneficial effects:

[0063] The method for switching the channel of the earphone, the system and the earphone terminal disclosed in the embodiments of the present application can accurately identify and judge the wearing situation of the left and right ears of the earphone terminal, and accurately send the left and right channel input audio signals, without the need for the user to manually switch the left and right channels of the earphone terminal, thereby greatly improving the use convenience of the earphone terminal. BRIEF DESCRIPTION OF DRAWINGS

[0064] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0065] Figure 1 is a structural schematic diagram of the earphone terminal provided by Embodiment 1 of the present application;

[0066] Figure 2 is an internal structural diagram of the earphone in the earphone terminal provided by Embodiment 1 of the present application and a schematic diagram of the state when inserted into the ear canal;

[0067] Figure 3 is a cross-sectional view of the internal structure of the earphone in the earphone terminal provided by Embodiment 1 of the present application, showing the case that the sound pickup device is located on one side of the symmetry plane of the earphone;

[0068] Figure 4 is a working circuit diagram of the earphone terminal provided by Embodiment 1 of the present application;

[0069] Figure 5 is a schematic diagram of the external structure of the earphone in the earphone terminal provided by Embodiment 2 of the present application;

[0070] Figure 6 is a module schematic diagram of the system for switching the sound channels of the earphone provided by Embodiment 3 of the present application;

[0071] Figure 7 is a step schematic diagram of the method for switching the sound channels of the earphone provided by Embodiment 4 of the present application;

[0072] Figure 8 is the spectrum feature map used by the feedback microphone to judge the left and right ears in Step 102 of the method for switching the sound channels of the earphone provided by Embodiment 4 of the present application;

[0073] Figure 9 is a flowchart of the first acquisition method of the left sound channel feature information and the right sound channel feature information preset in the method for switching the sound channels of the earphone provided by Embodiment 4 of the present application;

[0074] Figure 10 is a flowchart of the second acquisition method of the left sound channel feature information and the right sound channel feature information preset in the method for switching the sound channels of the earphone provided by Embodiment 4 of the present application.

[0075] Reference signs:

[0076] 10 - Left earphone; 20 - Right earphone; 30 - Earphone cable; 40 - Adapter; 50 - Ear canal;

[0077] 100 - Anterior cavity; 101 - Anterior cavity; 102 - Ear cover; 103 - Tip;

[0078] 200-Main body; 201-Outer shell; 202-Front cover; 203-Sound-generating device; 204-Sound-collecting device; 205-Processing device.

Detailed Implementation Methods

[0079] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0080] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0081] The following describes embodiments of the headphone terminal and its implementation method. The headphone terminal can be a type of headset, such as over-ear headphones, in-ear headphones, earbuds, true wireless stereo (TWS) headphones, or wired stereo headphones. The headphone terminal can connect to various types of communication systems, such as long-term evolution (LTE) systems, future 5th generation (5G) systems, new radio access technology (NR) technologies, and future communication systems like 6G systems; it can also be a wireless local area network (WLAN).

[0082] Example 1

[0083] like Figure 1 The diagram shown is a schematic diagram of an earphone terminal disclosed in Embodiment 1 of this application.

[0084] The earphone terminal has a left earphone 10, a right earphone 20, an earphone wire 30 and an adapter 40. One end of the earphone wire 30 is connected to the left earphone 10 and the right earphone 20 respectively, and the other end of the earphone wire 30 is connected to the adapter 40. Since the left earphone 10 and the right earphone 20 are similar in shape, external structure and internal structure, only a slight difference is designed to adapt to the ear canal structure of the left ear and the right ear, and for the convenience of description, the following description of the external shape and internal structure of the earphone 10, 20 is applicable to the left earphone 10 and the right earphone 20. If there is a structural difference between the left earphone 10 and the right earphone 20, it will be clarified below.

[0085] Referring to Figure 2 and Figure 3 , the earphone 10, 20 has a front cavity part 100 and a main body part 200. The front cavity part 100 is inserted into the ear canal 50, and the main body part 200 is connected to the front cavity part 100 and located outside the ear canal 50. Specifically, the front cavity part 100 has a front cavity 101 and an ear sleeve 102. The main body part 200 has a shell 201, a front cover plate 202, a sound emitting device 203, a sound pickup device 204 and a processing device 205. The ear sleeve 102 is sleeved outside the front cavity 101, and when the earphone 10, 20 is inserted into the ear canal 50, the ear sleeve 102 props open the ear wall and is clamped in the ear canal 50. The front cover plate 202 is arranged at the connection between the shell 201 and the front cavity 101 and seals the front end of the shell 201 close to the front cavity 101. The sound emitting device 203, the sound pickup device 204 and the processing device 205 are all installed in the cavity of the shell 201 sealed by the front cover plate 202. The sound emitting device 203 and the sound pickup device 204 are electrically connected to the processing device 205 respectively. The sound emitting device 203 is used to emit a sound channel detection signal. The sound pickup device 204 is used to collect the sound channel detection signal. The processing device is used to calculate and process the sound channel detection signal. Among them, the sound emitting device 203 is a player; the sound pickup device 204 is a feedback microphone; the sound channel detection signal is a sound signal which enters the ear canal 50 through the front cavity part 100 of the earphone 10, 20 and can be collected by the feedback microphone as the sound pickup device 204.

[0086] In order to enable the earphone terminal to autonomously identify the matching of the left earphone 10 and the right earphone 20 with the sound channel signal and automatically switch the sound channel signal of the left earphone 10 and the right earphone 20, the sound channel detection signals emitted from the sound emitting devices 203 of the two earphones 10, 20, collected by the sound pickup devices 204 and processed should have differences. The processing device 205 can distinguish the wearing information of the left ear and the right ear of the user by processing the sound channel detection signal according to the difference, and finally output the correct left sound channel signal and right sound channel signal.

[0087] Referring to Figure 3, the two earphones 10, 20 are substantially symmetrical about a symmetry plane of the earphones 10, 20, which is indicated by a dashed line in the figure, and the internal structures of the two earphones 10, 20 are mostly the same, such as the arrangement of the sound production device 203 and the processing device 205, but the front cavity part 100 is not symmetrical about the symmetry plane, and the volume of the front cavity part 100 is at least 0.2 cubic centimeters. In order to obtain characteristic information representing different side ear canals 50, the installation positions of the sound pickup devices 204 are not the same. The sound pickup devices 204 are not on the symmetry plane of the earphones 10, 20, but are respectively installed on one side of the symmetry plane of the earphones 10, 20, and the distance between the sound pickup devices 204 and the symmetry plane is at least 2 millimeters. When the earphones 10, 20 are worn on the left and right ears, the high-frequency spectrum part of the characteristic information collected by the sound pickup devices 204 will be different due to the asymmetry of the sound pickup devices 204, and different characteristic information will be obtained, which can be used as a basis for identifying left and right channel signals. When the earphones 10, 20 are worn on the left and right ears, the high-frequency spectrum part of the characteristic information collected by the sound pickup devices 204 will be different due to the change of the load impedance of the front cavity part 100. At this time, there is a fixed frequency response difference between the left and right ears. This response difference is mainly caused by the difference in the installation position of the sound pickup devices 204 itself and does not change with the tightness of the wearing (i.e., the amount of sound leakage). This difference in frequency information is stable, and this difference can be used to identify left and right ears, so it can help the earphone terminal accurately identify and judge the left and right ear wearing of the earphones 10, 20, and accurately send left and right channel signals, without the need for the user to manually replace the earphones 10, 20, greatly improving the convenience of using the earphone terminal.

[0088] Referring to Figure 4The earphone terminal has a working circuit, the sound generating device 203, the sound pickup device 204 and the processing device 205 are connected to the working circuit respectively, the processing device 205 is connected with a power supply, a memory, a radio frequency (RF) circuit, a Bluetooth module, a digital signal processor (DSP), a sensor and an input / output (I / O) interface respectively, the digital signal processor is connected with an audio circuit, and the sound generating device 203 and the sound pickup device 204 are connected to the audio circuit. The I / O interface is used to connect the processing device 205 and a central processing unit (CPU) of the earphone terminal, the power supply is used to supply power to the processing device 205, the memory is used to store data information, such as preset left channel characteristic information and right channel characteristic information, the RF circuit is used to output an RF current for generating a channel detection signal to the processing device 205, the Bluetooth module is used to provide a wireless transmission function, the sensor is used to sense a channel detection signal received by the processing device 205, the digital signal processor is used to process the RF current modulated by the processing device 205 into a channel detection signal and transmit the channel detection signal to the sound generating device 203 through the audio circuit, and the channel detection signal received by the sound pickup device 204 through the audio circuit is converted into a sensing current and transmitted to the processing device 205.

[0089] Compared with the prior art of adding an additional sensor to determine the position information of the earphone, the earphone terminal of the embodiment can accurately identify and determine the wearing conditions of the left and right ears of the stereo earphone by using the existing sound generating device 203 and sound pickup device 204, accurately transmit left and right channel input audio signals, and greatly improve the use convenience of the stereo earphone without manual replacement of the earphone by the user, without increasing the hardware cost, and with a stable improvement effect and significant benefits.

[0090] Embodiment 2

[0091] Embodiment 2 of the present application discloses an earphone terminal, and the earphone terminal of Embodiment 2 is substantially the same as the earphone terminal of Embodiment 1. The difference is that the front cavity part 100 of the earphone terminal of Embodiment 2 is an asymmetric structure.

[0092] See Figure 5In particular, the front cavity portion 100 has a tip 103 extending from one side of the front cavity 101, and the tip 103 is symmetrically shaped about a symmetry plane, which is indicated by a dashed line in the figure, and the tip 103 is used to penetrate into the ear canal and couple with the ear canal when worn. Due to the asymmetric structure of the front cavity portion 100, when the same earphone is worn on the left ear and the right ear, the front cavity portion 100 of the earphone is above or below, respectively, and the tip 103 penetrating into the ear canal and coupling with the ear canal produces different ear canal impedances. When the left earphone and the right earphone are reversed, the high-frequency spectrum collected by the sound pickup device 204 will be different due to the change of the load impedance of the front cavity portion 100, and different characteristic information is obtained, which can be used as a basis for identifying the left and right channel signals.

[0093] Embodiment 3

[0094] As Figure 6 shown in the embodiment 3 of the present application, a system for switching the channel of the earphone is disclosed. The system is installed in the processing device mentioned in the embodiment 1 and the embodiment 2 of the present application. The system is used to obtain the characteristic information generated in the sound transmission process in the left ear and the right ear according to the received channel detection signal, and to distinguish whether the output signal in the left ear and the right ear is correct by using the ear canal characteristics that the ear canal details of the left ear and the right ear are not completely consistent, so that the signals of the left earphone and the right earphone can be actively switched when the output signals of the left earphone and the right earphone do not match, and the effect of outputting the correct channel signal is achieved.

[0095] In particular, the system includes a preset unit 1, a receiving unit 2, a processing unit 3, a comparison unit 4, a switching unit 5, and an output unit 6.

[0096] The preset unit 1 is used to preset the left channel characteristic information and the right channel characteristic information.

[0097] The receiving unit 2 is used to receive the channel detection signal from the sound generating device picked up by the sound pickup device in the earphone terminal.

[0098] The processing unit 3 is used to perform Fourier transform on the received channel detection signal to obtain the characteristic information of the left earphone and the characteristic information of the right earphone, respectively.

[0099] The comparison unit 4 is used to compare the characteristic information of the left earphone with the preset left channel characteristic information, and compare the characteristic information of the right earphone with the preset right channel characteristic information, to obtain a comparison result.

[0100] The switching unit 5 is used to switch the left channel signal and the right channel signal when the comparison result is inconsistent.

[0101] The output unit 6 is used to output the correct left channel signal and the correct right channel signal.

[0102] In the system for switching earphone sound channels of the embodiment 3, the preset unit presets the determined preset left sound channel feature information and right sound channel feature information, so that each earphone terminal has a determined standard for determining left and right sound channel signals when it is manufactured. The left and right ear wearing conditions of the earphone terminal can be accurately identified and determined, and the left and right sound channel input audio signals can be accurately sent without manual switching of the left and right sound channels of the earphone terminal, thereby greatly improving the use convenience of the earphone terminal.

[0103] Embodiment 4

[0104] The embodiment 4 provides a method for switching earphone sound channels. The method aims to solve the problem of the existing technology that additional sensors need to be set to determine whether the sound channel information of the left ear and the right ear is correct, which is not conducive to stacking and weight reduction and has low identification accuracy.

[0105] The method is executed by the system for switching earphone sound channels disclosed in the embodiment 3, which is installed in the processing device of the earphone terminal disclosed in the embodiments 1 and 2. The step flow chart of the method is shown in Figure 7 , and specifically includes the following steps:

[0106] Step 101: preset left sound channel feature information and right sound channel feature information.

[0107] Step 102: receive the sound channel detection signal from the sound generating device picked up by the sound pickup device in the earphone terminal.

[0108] Step 103: process the received sound channel detection signal to obtain the feature information of the left earphone and the feature information of the right earphone, respectively.

[0109] Step 104: compare the feature information of the left earphone with the preset left sound channel feature information, and compare the feature information of the right earphone with the preset right sound channel feature information to obtain a comparison result. If the comparison result is consistent (i.e. YES), execute Step 105; if the comparison result is inconsistent (i.e. NO), execute Step 106.

[0110] Step 105: normally output the left sound channel signal and the right sound channel signal.

[0111] Step 106: switch the left sound channel signal and the right sound channel signal.

[0112] Step 107: equalize and compensate (EQ) the left sound channel signal and the right sound channel signal to be output, respectively. When the comparison result is inconsistent, switch the left sound channel signal and the right sound channel signal. After the switching operation, the left and right sound channel signals to be output are correct left and right sound channel signals.

[0113] Step 108: output the correct left and right channel signals. The output left and right channel signals are usually equalized.

[0114] The method is based on the principle of the influence of the impedance characteristics of the ear canal-eardrum of the human ear on the acoustic characteristics of the in-ear earphone to identify whether the left earphone and the right earphone output the correct channel signals, thereby achieving the technical effect of controlling the earphone terminal without user operation of the mobile terminal and being able to adaptively switch the channel signals of the left earphone and the right earphone.

[0115] In step Step 103, the signal processing is Fourier transform or time domain algorithm transform. The time domain algorithm can be Pearson correlation, time-lag cross-correlation, etc. The preset characteristic information in step Step 101 can be a preset characteristic spectrum or a preset time domain characteristic. When the preset left channel characteristic information and the preset right channel characteristic information are characteristic spectra, the frequency band of the characteristic spectrum is 1-10 kHz. When the preset left channel characteristic information and the preset right channel characteristic information are time domain characteristics, the switching of the left and right channels is performed by comparing the detected characteristic information with the preset time domain characteristic. Hereinafter, the preset characteristic information is described as a characteristic spectrum.

[0116] When the earphone terminal adopts the structure disclosed in Embodiment 1 of the present application, i.e., the feedback microphone as the sound pickup device is arranged at different positions in the left earphone and the right earphone and is not arranged on the symmetrical surface of the earphone. Due to the different structures of the front cavity parts of the left and right channels of the earphone and the difference in the ear canal structure of the left and right ears, when the earphone with the same player is worn in the left ear and the right ear, the high frequency part (1-10 kHz) in the frequency spectrum curve received by the feedback microphone will have significant differences. In addition, due to the position difference between the feedback microphone in the left earphone and the feedback microphone in the right earphone, the characteristic information of the channel detection signals collected by the feedback microphones after processing will have differences due to the changes in the load impedance of the front cavity parts. Therefore, by using this difference, the characteristic information of the channel signals of the left and right ears can be tested in advance during the design and development stage. The characteristic information actually tested by the feedback microphone is compared with the preset characteristic spectrum. If they are the same, it is determined that the wearing is normal. If they are different, the output signals of the left and right ears need to be switched, and the correct left and right channel signals are output after switching. The preset left channel characteristic information and right channel characteristic information for comparison can make each earphone terminal have a certain standard for determining the left and right channel signals when it is shipped. See Figure 8It can be seen that the low frequency spectrum at circle A is greatly affected by wearing method and leakage, and is unstable, and the spectrum at 1-10 kHz at circle B has obvious difference. Because the medium and high frequencies reflect the difference of the ear canal of human ear and the difference of the placement position of the microphone, the difference can be used as the identification feature of left and right ear wearing. Through step Step104, the left and right ears can be identified by using the difference feature, and when the obtained feature information does not conform to the preset feature information, the left and right channel signals are switched. Before outputting the signals, step Step107 is performed to perform equalization compensation, so that the balance and sound quality of the audio signals of the left and right earphones after outputting can be ensured. Finally, the correct left and right channel signals are outputted.

[0117] The above method uses the fixed frequency response difference between the left and right ears caused by the different positions of the feedback microphone in the ear canal, and the difference does not change with the tightness of wearing (leakage), so that the left and right ear wearing conditions of the earphone terminal can be accurately identified and judged, and the left and right channel input audio signals can be accurately sent, without the need for the user to manually switch the earphone channel, thereby greatly improving the use convenience of the earphone.

[0118] In the method of the present embodiment 4, the left channel feature information and the right channel feature information of step Step101 are pre-stored in the memory of the earphone terminal of the present embodiment 1 (see Figure 4 ) for calling and comparison, and can be obtained through the following two processes.

[0119] The first process is to record the feature spectrum of the channel detection signal when the left and right ears are worn for multiple times, fit all the recorded feature spectrums, and finally record the left channel feature information and the right channel feature information as the basis for identifying the left and right ears. The specific process is shown in Figure 9 .

[0120] Step 1: the left earphone is worn on the left ear and the right ear, and the right earphone is worn on the left ear and the right ear;

[0121] Step 2: the player sends out the channel detection signal;

[0122] Step 3: the feedback microphone receives the channel detection signal;

[0123] Step 4: Fourier transform is performed on the channel detection signal;

[0124] Step 5: the preset left channel feature information (LL and LR) and the right channel feature information (RL and RR) are obtained respectively;

[0125] Step 6: the preset left channel feature information (LL and LR) and the right channel feature information (RL and RR) are stored.

[0126] The first process has the advantage that the left channel characteristic information and the right channel characteristic information as the reference basis are more accurate, a certain segment of 1-10 kHz is taken as the spectrum recognition characteristic, and the balance and sound quality of the left and right ears are ensured through equalization compensation of the medium and high frequency spectrum effects after recognition.

[0127] The second process is to record the left and right ear channel detection signals collected when the user first correctly wears the earphone terminal, and the characteristic spectrum obtained through processing is recorded as the left channel characteristic information and the right channel characteristic information respectively. The specific process is shown in Figure 10 .

[0128] Step a: remind the user to correctly wear the left and right ears for the first time;

[0129] Step b: the player sends out a channel detection signal;

[0130] Step c: the feedback microphone receives the channel detection signal;

[0131] Step d: the feedback microphone processes the channel detection signal to obtain the preset left channel characteristic information and the preset right channel characteristic information;

[0132] Step e: store the preset left channel characteristic information and the preset right channel characteristic information.

[0133] First, it is ensured that the user correctly wears the left and right ears for the first time, and then a set of characteristic spectrums can be recorded according to this time of wearing and stored in the characteristic database of the earphone. Thereafter, the user can not need to intentionally distinguish the left and right ears, and after wearing the earphone, the earphone can automatically detect the characteristic information of the left and right ears. If the characteristic information of the left and right ears is consistent with the characteristic spectrum of the first time of wearing, it can be judged that the wearing is correct, otherwise, the channel is automatically switched and the correct audio signal is output to the left and right ears. No matter which process is adopted, the preset left channel characteristic information and the preset right channel characteristic information are stored in the memory of the earphone terminal of the embodiment 1 of the present application (see Figure 4 ).

[0134] The method for switching the channels of the earphone in the embodiment 4 of the present application does not need to preset the characteristic spectrum, but generates the characteristic spectrum of the left and right ears according to the first correct wearing of the user, and therefore the accuracy is higher; at the same time, since only the difference between the ear canals of the left and right ears is utilized, the earphone itself (including the front cavity part and the position of the feedback microphone) can be designed in a perfect symmetrical form.

[0135] Embodiment 5

[0136] The embodiment 5 of the present application provides a computer readable storage medium including a program or instructions, when the program or instructions are run on a computer, the method as described in the embodiment 3 of the present application is executed.

[0137] The method, system and earphone terminal for switching earphone channels disclosed in the embodiments of the present application can accurately identify and determine the left and right ear wearing conditions of the earphone terminal, and accurately send left and right channel input audio signals, without the need for the user to manually switch the left and right channels of the earphone terminal, thereby greatly improving the convenience of using the earphone terminal.

[0138] In the above embodiments, the method can be implemented wholly or partially by software, hardware, firmware or any combination thereof. When implemented by software, the method can be implemented wholly or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are wholly or partially generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another, for example, the computer instructions can be transferred from one website, computer, server or data center to another via wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, high-density digital video disc (Digital Video Disc, DVD)) or semiconductor media (for example, solid state disk (Solid State Disk, SSD)) and the like.

[0139] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of the examples have been described in general terms in the above description. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0140] The above is only a preferred embodiment of the present application and should not be used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for switching headphone channels, characterized in that, The method includes the following steps: The device receives a channel detection signal from a sound-generating device picked up by a pickup device in an earphone terminal; the earphone terminal has an earpiece with a symmetrical outline about a symmetrical plane, and the pickup device is located on one side of the symmetrical plane of the earphone; the pickup device in the left earphone and the pickup device in the right earphone have different installation positions; the earphone includes a front cavity portion, the front cavity portion includes a front cavity and an ear cup, the ear cup being fitted over the front cavity; the front cavity portion is asymmetrical about the symmetrical plane, the front cavity portion also includes a tip, the tip extending from one side of the front cavity, and the outline of the tip is symmetrical about the symmetrical plane; The received channel detection signal is processed to obtain the feature information of the left earphone and the feature information of the right earphone respectively. The feature information of the left earphone is compared with the preset left channel feature information, and the feature information of the right earphone is compared with the preset right channel feature information to obtain the comparison result. When the comparison results are inconsistent, switch the left and right channel signals and then output the correct left and right channel signals.

2. The method for switching headphone channels according to claim 1, characterized in that, Before the step of receiving the channel detection signal from the sound-generating device picked up by the pickup device in the receiving headphone terminal, the following steps are also included: Preset left channel and right channel feature information.

3. The method for switching headphone channels according to claim 2, characterized in that, The steps of setting the left channel feature information and the right channel feature information further include the following steps: Wear the left earphone in the left and right ears respectively, and wear the right earphone in the left and right ears respectively; The sound-generating device emits a sound channel detection signal; The pickup device receives the sound channel detection signal; The preset left channel feature information and right channel feature information are obtained respectively; Store preset left and right channel feature information.

4. The method for switching headphone channels according to claim 2, characterized in that, The steps of setting the left channel feature information and the right channel feature information further include the following steps: Remind users to wear the left and right ears correctly the first time; The sound-generating device emits a sound channel detection signal; The pickup device receives the sound channel detection signal; The pickup device processes the channel detection signal to obtain preset left channel characteristic information and right channel characteristic information; Store preset left and right channel feature information.

5. The method for switching headphone channels according to claim 1, characterized in that, Before outputting the left and right channel signals, the following steps are also included: Equalization compensation is applied to the left and right channel signals that are about to be output.

6. The method for switching headphone channels according to claim 1, characterized in that, The preset frequency bands for the left and right channel feature information are 1 to 10 kHz.

7. The method for switching headphone channels according to claim 1, characterized in that, In the step of processing the received channel detection signal to obtain the feature information of the left earphone and the feature information of the right earphone, the signal processing is Fourier transform or time-domain algorithm transform.

8. A system for switching headphone channels, characterized in that, The system includes: a receiving unit, a processing unit, a comparison unit, a switching unit, and an output unit; The receiving unit is used to receive the channel detection signal from the sound-generating device picked up by the pickup device in the headphone terminal; the headphone terminal has a symmetrical outline about a symmetrical plane, and the pickup device is located on one side of the symmetrical plane of the headphone; the pickup device in the left headphone and the pickup device in the right headphone have different installation positions; the headphone includes a front cavity portion, the front cavity portion includes a front cavity and an ear cup, the ear cup is fitted outside the front cavity; the front cavity portion is asymmetrical about the symmetrical plane, the front cavity portion also includes a tip, the tip extends from one side of the front cavity, and the outline of the tip is symmetrical about the symmetrical plane; The processing unit is used to process the received channel detection signal to obtain the feature information of the left earphone and the feature information of the right earphone respectively. The comparison unit is used to compare the feature information of the left earphone with the preset left channel feature information, and to compare the feature information of the right earphone with the preset right channel feature information to obtain the comparison result. The switching unit is used to switch the left channel signal and the right channel signal when the comparison result is inconsistent. The output unit is used to output the correct left channel signal and right channel signal.

9. The system for switching headphone channels according to claim 8, characterized in that, The system also includes a preset unit, which is used to preset the left channel feature information and the right channel feature information.

10. A headphone terminal, characterized in that, The device includes two earphones and a system for switching earphone channels as described in any one of claims 8 to 9; the system is installed in the earphones.

11. The headphone terminal according to claim 10, characterized in that, The earphone also includes a main body portion, which is connected to the front cavity portion; The main body includes a housing, a front cover, a sound-generating device, a sound-collecting device, and a processing device. The housing is connected to the front cavity. The front cover is located at the connection between the housing and the front cavity and seals the front end of the housing near the front cavity. The sound-generating device, the sound-collecting device, and the processing device are all installed in the cavity of the housing that is sealed by the front cover. The sound-generating device and the sound-collecting device are electrically connected to the processing device.

12. The headphone terminal according to claim 11, characterized in that, The distance between the pickup device and the plane of symmetry is at least 2 millimeters.

13. The headphone terminal according to claim 12, characterized in that, The volume of the anterior cavity portion is at least 0.2 cubic centimeters.

14. The headphone terminal according to claim 11, characterized in that, The sound-generating device, the sound-pickup device, and the processing device are connected to the working circuit of the headphone terminal. The processing device is respectively connected to a power supply, a memory, a radio frequency circuit, a Bluetooth module, a digital signal processor, a sensor, and an input / output interface. The digital signal processor is connected to the audio circuit, and the sound-generating device and the sound-pickup device are connected to the audio circuit.

15. A computer-readable storage medium, characterized in that, Includes a program or instructions that, when run on a computer, execute the method as described in any one of claims 1 to 7.

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