WO2015143896A1

WO2015143896A1 - Recognition circuit, method, apparatus and system for external device based on earphone socket

Info

Publication number: WO2015143896A1
Application number: PCT/CN2014/093598
Authority: WO
Inventors: 刘文剑
Original assignee: 北京奇虎科技有限公司; 奇智软件（北京）有限公司
Priority date: 2014-03-24
Filing date: 2014-12-11
Publication date: 2015-10-01
Also published as: CN103873988B; CN103873988A

Abstract

Disclosed are a recognition circuit, method, apparatus and system for an external device based on an earphone socket. The recognition circuit comprises an earphone plug and a sound recording loop. The earphone plug is provided with a sound channel connection end, a microphone connection end and a grounding end; and the sound recording loop is provided with a first connection end, a second connection end and a third connection end, wherein the first connection end is connected to the sound channel connection end, the second connection end is connected to the microphone connection end, and the third connection end is connected to the grounding end. The sound recording loop is connected to a microphone in an intelligent electronic device through the earphone plug and an earphone socket in the intelligent electronic device, and a megaphone circuit is formed by the sound recording loop, the earphone plug, the earphone socket and the microphone together.

Description

External device identification circuit, method, device and system based on earphone socket

Technical field

The present invention relates to a device identification technology, and in particular to an external device identification circuit, method, device and system based on a headphone jack.

Background technique

Intelligent electronic devices (such as intelligent electronic devices based on the Android operating system) can be connected to external devices through their earphone sockets, such as smart electronic devices through their earphone sockets and earphones, Lara equipment, mobile phone infrared remote control or mobile phone button devices Wait for external devices to connect.

In the case that the intelligent electronic device is connected to the external device through its earphone socket, the intelligent electronic device should effectively identify the inserted external device. Otherwise, the smart electronic device considers that the external device inserted in the earphone socket is the earphone, thus, the smart electronic device The device outputs sound through the headphones, which may result in the user not being able to make and receive calls (in the case of smart electronic devices as smart mobile phones), listening to music, and watching videos.

At present, there are two main ways for an intelligent electronic device to identify an external device inserted in its earphone socket: mode one: an external device based on the ultrasonic modulation and demodulation technology of the 10KHZ frequency band; mode 2, based on the MCU (micro control unit) The external device is identified, that is, when the earphone plug of the external device is inserted into the earphone socket, the MCU in the external device actively outputs a special audio signal to the intelligent electronic device, so that the intelligent electronic device can recognize the special audio signal received by the smart electronic device. Plug in an external device to the headphone jack.

In the process of implementing the present invention, the inventor has found that, in the case of the above manner, in the case where the earphone socket of the intelligent electronic device is inserted into the earphone, if the ultrasonic external device of the 10KHZ frequency band is used for identification, a harsh high-frequency sound is generated. The stimulation to the human ear is very large, which will affect the user's feelings. In addition, if the intelligent electronic device performs external device identification during the music playing, the concert played by it affects the accuracy of the external device identification; In other words, because the MCU is large in size and high in cost, setting the MCU in the external device may have a large impact on the volume and cost of the external device.

Summary of the invention

In view of the above problems, the present invention has been made in order to provide an external device identification circuit based on a headphone jack that overcomes the above problems or at least partially solves the above problems, a corresponding external device identification method based on a headphone jack, and an external device identification based on a headphone jack The device and the external device identification system based on the earphone socket, the computer program, and the computer readable medium.

According to a first aspect of the present invention, an external device identification circuit based on a headphone jack includes: an earphone plug and a recording circuit; the earphone plug has a channel connection end, a microphone connection end, and a ground end; The circuit has a first connection end, a second connection end, and a third connection end; wherein the first connection end is connected to the channel connection end, and the second connection end is connected to the microphone connection end, The third connection end is connected to the ground end; the recording circuit is connected to the microphone in the smart electronic device through the earphone plug and the earphone socket in the smart electronic device, and the recording circuit and the earphone plug, the earphone socket and the microphone Together form a microphone circuit.

According to a second aspect of the present invention, a method for identifying an external device based on a headphone jack includes: triggering an intelligent electronic device to record after the earphone socket of the smart electronic device is inserted into the external device, and the smart electronic device is The current audio playback volume is set to a first predetermined value; in the case of the first predetermined value, the volume value of the sound obtained by the recording is acquired; the current audio playback volume of the intelligent electronic device is set to a second predetermined value; Predetermining an audio signal, and in the case of the second predetermined value, acquiring a volume value of the sound obtained by the recording; determining from a comparison between the volume value acquired for the first predetermined value and the volume value acquired for the second predetermined value Whether the external device is an external device provided with a recording circuit and a headphone plug, and the recording circuit forms a microphone circuit together with the earphone plug and the earphone socket and the microphone of the smart electronic device.

According to a third aspect of the present invention, there is provided an external device identification device based on a headphone jack, comprising: a first setting module, configured to trigger an intelligent electronic device to record after detecting that the earphone socket of the smart electronic device is inserted into the external device And setting a current audio playback volume of the smart electronic device to a first predetermined value; the first obtaining module is adapted to obtain a volume value of the sound obtained by the recording in the first predetermined value; the second setting a module adapted to set a current audio playback volume of the intelligent electronic device to a second predetermined value; a second acquisition module adapted to play a predetermined audio signal, and obtain, by the second predetermined value, the obtained by the recording a volume value of the sound; the identification module, configured to determine whether the external device is an external device provided with a recording loop and a headphone plug according to a comparison between a volume value acquired for the first predetermined value and a volume value obtained for the second predetermined value a device, and the recording circuit is shaped with the earphone plug and a headphone jack and a microphone of the smart electronic device Microphone circuit.

According to a fourth aspect of the present invention, an external device identification system based on a headphone jack is provided, the system comprising: an external device and an intelligent electronic device; wherein the external device is provided with the above identification circuit; the intelligent electronic device The above-mentioned external device identification device based on the earphone socket is provided.

According to a fifth aspect of the invention, a computer program comprising computer readable code, when the electronic device runs the computer readable code, causes the DEBUG debugging method to be executed.

According to a sixth aspect of the invention, a computer readable medium is provided, wherein a computer program as described above is stored.

The earphone socket-based external device identification circuit, method, device and system of the present invention provide an external device identification circuit based on the earphone socket in the external device, and the recording circuit in the identification circuit passes through the earphone plug and the earphone in the smart electronic device The socket is connected with the microphone in the intelligent electronic device, and forms a microphone circuit, so that when the earphone socket of the intelligent electronic device is inserted into the external device having the identification circuit, the intelligent electronic device can realize recording through the microphone circuit; The volume value of the sound obtained by recording different sound sources in the audio playback volume has certain characteristics. Therefore, by comparing the volume values of the recorded sounds, it is possible to accurately recognize whether the external device inserted in the earphone socket of the intelligent electronic device is For the external device provided with the above identification circuit; since the sound source in the present invention can use ordinary music, the present invention can avoid the stimulation of the human ear by the ultrasonic wave during the identification process of the external device; since the identification circuit of the present invention uses the recording circuit ,and Large and costly sound effects can be realized using a simple circuit is usually cheaper components (such as capacitors and resistors, etc.), therefore, the present invention is to avoid the use of the MCU causing the external device to identify the volume of external devices.

The above description is only an overview of the technical solutions of the present invention, and the above-described and other objects, features and advantages of the present invention can be more clearly understood. Specific embodiments of the invention are set forth below.

DRAWINGS

Various other advantages and benefits will become apparent to those skilled in the art from a The drawings of the present embodiments are only for the purpose of illustrating the preferred embodiments and are not intended to limit the invention. Throughout the drawings, the same reference numerals are used to refer to the same parts. In the drawing:

Figure 1 shows a schematic view of a headphone plug;

2 is a schematic diagram showing a specific circuit structure of an external device identification circuit based on a headphone jack according to a first embodiment of the present invention;

3 is a schematic diagram showing another specific circuit structure of an external device identification circuit based on a headphone jack according to a first embodiment of the present invention;

4 is a schematic diagram showing still another specific circuit structure of an external device identification circuit based on a headphone jack according to the first embodiment of the present invention;

FIG. 5 is a flowchart of a method for identifying an external device based on a headphone jack according to a second embodiment of the present invention; FIG.

FIG. 6 is a flowchart of a method for identifying an external device based on a headphone jack according to a third embodiment of the present invention. Figure

FIG. 7 is a schematic diagram showing an initialization process in an external device identification method based on a headphone jack according to Embodiment 3 of the present invention; FIG.

8 is a schematic diagram of an external device identification device based on a headphone jack according to Embodiment 4 of the present invention;

9 is a schematic diagram of an external device identification device based on a headphone jack according to Embodiment 5 of the present invention;

Figure 10 shows a block diagram of an electronic device for performing the method of the present invention;

Figure 11 shows a schematic diagram of a memory unit for holding or carrying program code implementing a method in accordance with the present invention.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.

Embodiment 1.

Embodiment 1 The external device identification circuit based on the earphone socket. The identification circuit of this embodiment will be described below with reference to Figs. 1, 2 and 3.

The external device identification circuit based on the earphone socket of the embodiment mainly includes: an earphone plug and a recording circuit, wherein the recording circuit has a plurality of connecting ends, and the plurality of connecting ends are respectively connected with the plurality of connecting ends in the earphone plug.

Specifically, the current earphone plug usually has a channel connection end, a microphone connection end, and a ground end; when the earphone plug is a two-channel earphone plug, the above-mentioned channel connection end usually includes: a left channel connection end and a right channel connection When the earphone plug is a mono earphone plug, the above channel connection is usually a mono connection.

A specific example of a headphone plug is shown in Figure 1.

In the case that the earphone plug of FIG. 1 conforms to the International Standard (CTIA), the earphone plug mainly includes: a microphone connection end 1, a ground connection terminal 2, a right channel connection end 3, and a left channel connection end 4.

In the case that the earphone plug of FIG. 1 conforms to the National Standard (OMTP), the earphone plug mainly includes: a ground connection end 1, a microphone connection end 2, a right channel connection end 3, and a left channel connection end 4.

The recording circuit of this embodiment is mainly used to form a microphone loop together with a microphone plug, a headphone jack, and a microphone in an intelligent electronic device, such as forming a condenser microphone loop.

In order to form a microphone circuit, the recording circuit has a first connection end, a second connection end, and a third connection And the first connection end is connected to the channel connection end of the earphone plug, the second connection end is connected to the microphone connection end of the smart electronic device, and the third connection end is connected to the ground end of the earphone plug.

In the case where the earphone plug is a mono earphone plug, the first connection end in the recording circuit is connected to the mono connection end of the earphone plug.

In the case where the earphone plug is a two-channel earphone plug, the first connection end in the recording loop is connected to at least one of the left channel connection end and the right channel connection end; in general, the first in the recording loop A connection end is connected to the left channel connection end and the right channel connection end, respectively.

In order to form a condenser microphone circuit, the recording circuit usually includes components such as a capacitor and a resistor; a specific example of the recording circuit in this embodiment is shown in FIG.

"1", "2", "3", and "4" in Fig. 2 are the reference numerals of the respective connection ends of the earphone plug in Fig. 1 described above. The recording circuit in FIG. 2 includes a capacitor C1, a resistor R1, and a resistor R2. One end of the capacitor C1 is the first connection end, and is connected to the right channel connection end and the left channel connection end of the earphone plug respectively, and the other end of the capacitor C1 is respectively connected with the resistor R1 and the resistor R2, and the capacitor C1 and the resistor R1 and The resistors R2 are connected in series, respectively. One end of the resistor R1 is the second connection end, and is connected to the ground connection end or the microphone connection end of the earphone plug, and the other end of the resistor R1 is connected to the capacitor C1. One end of the resistor R2 is the third connection end, and is connected to the microphone connection end or the ground connection end of the earphone plug, and the other end of the resistor R2 is connected to the capacitor C1. The resistor R1 and the resistor R2 are connected in parallel.

Through the recording circuit shown in FIG. 2, the audio signal output by the intelligent electronic device can be transmitted back to the microphone in the intelligent electronic device through the earphone socket, the earphone plug and the recording circuit, and then the microphone circuit (capacitor) is formed. Microphone loop).

In addition, since the capacitor 1 in FIG. 2 is connected in series with the resistor R1 and the resistor R2, and the resistor R1 and the resistor R2 are connected in parallel, both ends of the resistor R1 are connected to the ground connection end of the earphone plug and one end of the resistor R2 is connected to the earphone. The microphone connection end of the plug is connected, or one end of the resistor R1 is connected with the microphone connection end of the earphone plug, and one end of the resistor R2 is connected with the ground connection end of the earphone plug, and the recording circuit can be connected with the earphone plug and the earphone in the intelligent electronic device. The socket and the microphone together form a microphone circuit; thus the recording circuit shown in Figure 2 is applicable to both International Standard (CTIA) and National Standard (OMTP) headphone plugs.

The capacitor C1 may be specifically a 1 uf (microfarad) capacitor, and the resistor R1 and the resistor R2 may be specifically a 1500 ohm resistor.

The recording circuit in FIG. 2 can also optionally include: switch E1. The switch E1 is connected in series between the microphone connection end of the recording circuit and the ground connection end; when the switch E1 is closed, since the recording circuit no longer forms a condenser microphone circuit with the microphone in the intelligent electronic device, the external connection cannot be performed again. Whether the device is an identification process of an external device provided with the above identification circuit.

Another specific example of the recording circuit in this embodiment is shown in FIG.

"1", "2", "3", and "4" in Fig. 3 are the identifications of the respective connection ends of the earphone plug in Fig. 1 described above. The recording circuit in Figure 3 includes: resistor R3, capacitor C2, and capacitor C3. One end of the resistor R3 is a first connection end, and is connected to the right channel connection end and the left channel connection end of the earphone plug, and the other end of the resistor R3 is respectively connected to the capacitor C2 and the capacitor C3, and the resistor R3 and the capacitor C2 and the capacitor are respectively connected. C3 is connected in series. One end of the capacitor C2 is a second connection end, and is connected to the ground connection end or the microphone connection end of the earphone plug, and the other end of the capacitor C2 is connected to the resistor R3. One end of the capacitor C3 is a third connection end, and is connected to the microphone connection end or the ground connection end of the earphone plug, and the other end of the capacitor C3 is connected to the resistor R3. The capacitor C2 and the capacitor C3 are connected in parallel. Through the recording circuit shown in FIG. 3, after the audio signal output by the intelligent electronic device passes through the earphone socket, the earphone plug and the recording circuit, it can be transmitted back to the microphone in the intelligent electronic device by the earphone plug and the earphone socket, thereby forming a microphone circuit.

In addition, since the resistor R3 in FIG. 3 is connected in series with the capacitor C2 and the capacitor C3, and the capacitor C2 is connected in parallel with the capacitor C3, both ends of the capacitor C2 are connected to the ground connection end of the earphone plug and one end of the capacitor C3 is connected to the earphone. The microphone connection end of the plug is connected, or one end of the capacitor C2 is connected with the microphone connection end of the earphone plug, and one end of the capacitor C3 is connected with the ground connection end of the earphone plug, and the recording circuit can be combined with the earphone plug and the intelligent electronic device. The headphone jack and the microphone together form a microphone circuit; thus the recording circuit shown in Figure 3 is applicable to both International Standard (CTIA) and National Standard (OMTP) headphone plugs.

The resistor R3 may be a resistor of 100 ohms to 400 ohms, and the capacitor C2 and the capacitor C3 may be a 1 uf (microfarad) capacitor.

The recording circuit in FIG. 3 can also optionally include: switch E1. The switch E1 is connected in series between the microphone connection end of the recording circuit and the ground connection end; when the switch E1 is closed, since the recording circuit no longer forms a condenser microphone circuit with the microphone in the intelligent electronic device, the external connection cannot be performed again. Whether the device is an identification process of an external device provided with the above identification circuit.

A further specific example of the recording circuit in this embodiment is shown in FIG.

"1", "2", "3", and "4" in Fig. 4 are the identifications of the respective connection ends of the earphone plug in Fig. 1 described above. The recording circuit in FIG. 4 includes a resistor R4, a resistor R5, and a resistor R6. One end of the resistor R4 is a first connection end, and is connected to the right channel connection end and the left channel connection end of the earphone plug respectively, and the other end of the resistor R4 is respectively connected with the resistor R5 and the resistor R6, and the resistor R4 and the resistor R5 and the resistor are respectively connected. R6 is connected in series. One end of the resistor R5 is a second connection end, and is connected to the ground connection end or the microphone connection end of the earphone plug, and the other end of the resistor R5 is connected to the resistor R4. One end of the resistor R6 is a third connection end, and is connected to the microphone connection end or the ground connection end of the earphone plug, and the other end of the resistor R6 is connected to the resistor R4. The resistor R5 and the resistor R6 are connected in parallel. Through the recording circuit shown in FIG. 4, after the audio signal output by the intelligent electronic device passes through the earphone socket, the earphone plug and the recording circuit, it can be transmitted back to the microphone in the intelligent electronic device by the earphone plug and the earphone socket, thereby forming a microphone circuit.

In addition, since the resistor R4 in FIG. 4 is connected in series with the resistor R5 and the resistor R6, and the resistor R5 is connected in parallel with the resistor R6, both ends of the resistor R5 are connected to the ground connection end of the earphone plug and one end of the resistor R6 is connected to the earphone. The microphone connection end of the plug is connected, or one end of the resistor R5 is connected to the microphone connection end of the earphone plug, and one end of the resistor R6 is connected with the ground connection end of the earphone plug, and the recording circuit can be combined with the earphone plug and the intelligent electronic device. The headphone jack and the microphone together form a microphone circuit; thus the recording circuit shown in Figure 4 is applicable to both International Standard (CTIA) and National Standard (OMTP) headphone plugs.

The resistor R4 may be a 6k ohm resistor, the resistor R5 may be a 6k ohm resistor, and the resistor R6 may be a 6k ohm resistor. It should be specially noted that the actual resistance values of the resistor R4, the resistor R5 and the resistor R6 in FIG. 4 may be the same or different; in the case where the sum of the resistances of any two resistors is in the range of 10k-15k, The recording circuit shown in 4 can be adapted to almost all types of mobile phones based on the Andriod operating system.

The recording circuit in FIG. 4 can also optionally include: switch E1. The switch E1 is connected in series between the microphone connection end of the recording circuit and the ground connection end; when the switch E1 is closed, since the recording circuit no longer forms a condenser microphone circuit with the microphone in the intelligent electronic device, the external connection cannot be performed again. Whether the device is an identification process of an external device provided with the above identification circuit.

Embodiment 2: An external device identification method based on a headphone jack. The method of this embodiment will be described below with reference to FIG.

In FIG. 5, S400, after detecting that the earphone socket of the smart electronic device is inserted into the external device, triggers the recording of the intelligent electronic device, and sets the current audio playback volume of the smart electronic device to a first predetermined value.

Specifically, the smart electronic device in this embodiment may be an intelligent electronic device (such as a smart mobile phone or a tablet computer using the Andriod operating system) using the Andriod operating system. In order to prevent the external device identification process of the embodiment from affecting the ongoing call or recording of the smart electronic device, the embodiment may detect that the earphone socket of the smart electronic device is inserted into the external device (for example, receiving the broadcast of the operating system by registering the listener) The message, after determining that the external device is inserted into the earphone socket of the smart electronic device according to the received message, detecting the current state of the smart electronic device (for example, by reading the current log of the smart electronic device, etc.) If the current state of the smart electronic device is detected as a voice-related state such as a call state or a recording state, the subsequent external device identification operation in this embodiment should not be temporarily performed, but wait for the smart electronic device to end. After the voice-related operation (such as ending the call or ending the recording), the subsequent external device identification operation in this embodiment is started.

Since the external device identification process of the embodiment modifies the current audio playback volume of the smart electronic device, the smart electronic device is modified in the process of performing the external device identification in this embodiment. Before the current audio playback volume operation, the current audio playback volume of the smart electronic device should be obtained, and the current audio playback volume should be stored, so that when the external device identification process of the embodiment is completed, the current state of the smart electronic device can also be The audio playback volume is restored to the audio playback volume before the external device recognition operation. That is to say, after the current audio playback volume of the smart electronic device is stored, the smart electronic device is triggered to perform a recording operation, and the current audio playback volume of the smart electronic device is set to a first predetermined value.

The first predetermined value may be a minimum value (ie, a mute value) of the smart electronic device, such as a first predetermined value of 0. That is, the embodiment may set the smart electronic device to a mute state.

In the embodiment, the operation of the triggering intelligent electronic device to perform the recording operation and the setting of the current audio playback volume of the intelligent electronic device to the first predetermined value may be limited. For example, the two operations may be performed simultaneously; The recording operation is performed, and then the setting operation of the first predetermined value is performed; or, the setting operation of the first predetermined value may be performed first, and then the recording operation is performed.

The above-mentioned operation of triggering the intelligent electronic device to perform the recording operation can be implemented by calling the recording function in the operating system of the intelligent electronic device. This embodiment does not limit the specific implementation manner of triggering the intelligent electronic device to perform the recording operation.

S410. Acquire a volume value of the sound obtained by the recording in a first predetermined value.

Specifically, after the smart electronic device is triggered to perform the recording operation, the embodiment needs to acquire the volume value of the sound obtained by the recording if the current audio playback volume of the smart electronic device is set to the first predetermined value.

In this embodiment, after the smart electronic device is triggered to perform a recording operation and waits for a certain time, the volume value of the sound obtained by the recording can be acquired. In a specific example, in a case where the smart electronic device is triggered to perform a recording operation and then the current audio playback volume of the smart electronic device is set, the current audio playback volume of the smart electronic device may be set to a first predetermined value. And waiting for the first predetermined time interval, the operation of acquiring the volume value of the sound obtained by the recording is performed.

In this embodiment, a plurality of volume values of the sound obtained by the recording may be obtained by using a timing acquisition manner, and an average value is calculated for the plurality of volume values, and the calculated volume average value is mainly used for a subsequent comparison process, and the volume is used for the subsequent comparison process. The average value can be referred to as a first volume average.

In this embodiment, when calculating the first volume average, it may be determined whether the first volume average is greater than a predetermined volume value (eg, 1000), and if the first volume average is greater than a predetermined volume value (eg, greater than 1000), then The external device is not an external device provided with the identification circuit in the first embodiment, and the identification process of the external device ends; if the first volume average is not greater than a predetermined value (for example, less than or equal to 1000), the implementation continues. The subsequent identification steps of the example.

The predetermined volume value may be preset in the smart electronic device according to experience; and the first predetermined time interval may be pre-set in the smart electronic device according to experience, or may be The sexuality is dynamically set in the intelligent electronic device for the actual situation of the intelligent electronic device.

A specific example of dynamically setting the first predetermined time interval for the actual situation of the smart electronic device is: setting the current audio playback volume of the smart electronic device may be a volume that the user can manually adjust by means of a button, etc., for example, in an intelligent electronic device. The volume that can be manually adjusted by the user through buttons or the like is divided into 15 levels (the intelligent mobile phone of the Andriod operating system has 15 levels of volume that can be manually adjusted by the user). The 15 levels can be referred to as volume 0 to volume 14, respectively. The volume 0 indicates silence; according to the order of volume 1 to volume 14, the sound corresponding to each of volume 1 to volume 14 gradually increases, and the volume corresponding to volume 14 is the loudest. In the case where the current audio playback volume is the above, the specific setting process of the first predetermined time interval includes: first, in the case that the smart electronic device is first connected to the external device having the above identification circuit of the present embodiment through the earphone plug and the earphone socket In this embodiment, the initial setting operation may be performed on the external device. Specifically, after the current audio playback volume of the intelligent electronic device is backed up, the current audio playback volume of the smart electronic device is set to a minimum volume other than the mute (ie, The above volume 1, that is, the volume corresponding to the minimum level other than the silent level); then, the triggering electronic device performs an operation of playing a locally stored audio signal (such as the second music built in the smart electronic device), and starts timing; After waiting for a period of time (such as 500 milliseconds), the smart electronic device is triggered to record, and after waiting for a period of time (such as 300 milliseconds), the volume value of the sound obtained by the recording is obtained (for example, obtaining the volume value returned by the operating system) And determine whether the volume value is greater than a predetermined value (such as 100) and whether the current timing value is A predetermined time period (for example, 2 seconds) is reached. If the acquired volume value is not greater than the predetermined value and the current timing value does not reach the predetermined duration, the volume value of the sound obtained by the recording is obtained, and the volume value and the current timing value are determined. Step; if the volume value is greater than the predetermined value or the current timing value reaches the predetermined duration, the current timing value of the timing is set to the first predetermined time interval.

It can be seen from the above specific example that the specific value of the first predetermined time interval in this embodiment is set to a value between the waiting time and the predetermined time length, for example, the minimum value of the first predetermined time interval is 300 milliseconds. And its maximum value is 2 seconds.

In addition, in actual applications, the volume that the smart electronic device can provide for the user to manually adjust by means of a button or the like may be more or less. In order to adapt to different types of smart electronic devices, the current audio of the smart electronic device in this embodiment The playback volume may not be the volume that the user can manually adjust by pressing a button, etc., a specific example, the maximum playback volume of the intelligent electronic device is divided into 15 levels, such as calculating the maximum playback volume / 15, according to the volume corresponding to the above divided levels Value to set the current audio playback volume of the smart device.

S420. Set a current audio playback volume of the smart electronic device to a second predetermined value.

Specifically, after the volume value of the sound obtained by the recording is successfully acquired for the first predetermined value, the current audio playback volume adjustment of the smart electronic device is set to a second predetermined value, and the second predetermined The value is greater than the first predetermined value.

The second predetermined value may be preset in the smart electronic device according to experience, or may be dynamically set in the smart electronic device for the purpose of the smart electronic device.

A specific example of dynamically setting the second predetermined value for the actual situation of the smart electronic device is: setting the first predetermined value to 0 (ie, the smart electronic device is in the mute state), and setting the current audio playback volume of the smart electronic device to 0. Obtaining the volume value of the sound obtained by the recording (such as obtaining the volume value returned by the operating system), and calculating an average value (recorded as the first average value) for the obtained plurality of volume values (such as 10 volume values); Play local pre-stored audio signals (such as playing the first music), and set the current audio playback volume of the smart electronic device to volume 1 (such as the minimum volume other than mute); then, periodically obtain the sound obtained through the recording Volume value (such as obtaining the volume value returned by the operating system), and calculating an average value (recorded as a second average value) for the obtained plurality of volume values (such as 10 volume values), and then determining whether the second average value is Is a predetermined multiple of the first average value (the predetermined multiple should be greater than 7 times, if 9 times can be used), if the second average does not reach a predetermined multiple of the first average, then the smart electronic The current audio playback volume is set to volume 2, and returns to the step of timingly obtaining the volume value of the sound obtained by the recording and calculating an average value (recorded as the second average value) for the obtained plurality of volume values and judging the multiple; If the second average value reaches a predetermined multiple of the first average value, the current audio playback volume of the intelligent electronic device is determined to be a second predetermined value.

S430. Play a predetermined audio signal, and in a second predetermined value, acquire a volume value of the sound obtained by the recording.

Specifically, in this embodiment, when the current audio playback volume of the smart electronic device is adjusted to be set to a second predetermined value, the volume value of the sound obtained by the recording is acquired.

The present embodiment can perform an operation of acquiring a volume value of a sound obtained by recording after playing a locally stored predetermined audio signal (such as the first music built in the smart electronic device) and waiting for a second predetermined time interval.

In this embodiment, a plurality of volume values obtained by recording can be obtained by using a timing acquisition method, and an average value (recorded as a second average value) is calculated for the obtained plurality of volume values, and the calculated volume average value is used. In the subsequent comparison process.

The second predetermined time interval is preset in the smart electronic device, and the second predetermined time interval may be pre-set in the smart electronic device according to experience, or may be a purposeful situation for the smart electronic device. And dynamically set in the smart electronic device.

A specific example of dynamically setting the second predetermined time interval for the actual situation of the intelligent electronic device is: in the process of performing the initial setting operation for the external device in this embodiment, after the first predetermined time interval is set, the smart electronic device continues to be triggered. The device plays a preset audio signal (such as the first music built into the smart electronic device) and starts timing, waiting for a while (such as waiting for 200) After milliseconds, obtain the volume value of the sound obtained by the recording (such as obtaining the volume value returned by the operating system), and determine whether the volume value is greater than a predetermined value (such as 100) and whether the current timing value reaches another predetermined duration (such as 1). Second), if the acquired volume value is not greater than the predetermined value and the current timing value does not reach another predetermined duration, return to the above-mentioned step of obtaining the volume value of the sound obtained by the recording and determining for the volume value and the current timing value; When the value is greater than the predetermined value or the current timing value reaches another predetermined length of time, the current timing value of the timing is set to the second predetermined time interval.

It can be seen from the above specific example that the specific value of the second predetermined time interval in this embodiment is set to a value between the waiting duration and another predetermined duration, such as the minimum value of the second predetermined time interval. 200 milliseconds, and its maximum value is 1 second.

S440. Determine, according to a comparison between the volume value acquired for the first predetermined value and the volume value acquired for the second predetermined value, whether the external device is an external device provided with the identification circuit in the first embodiment.

Specifically, the embodiment may determine whether an average value of the volume values calculated for the second predetermined value (ie, the second average value) reaches an average value of the volume values calculated for the first predetermined value (ie, the first average Another predetermined multiple of the value (for example, 7 times); if the second average value reaches 7 times of the first average value, it is determined that the external device is an external device provided with the identification circuit described in the first embodiment; If the two average values do not reach 7 times of the first average value, it is determined that the external device is not an external device provided with the identification circuit described in the first embodiment.

The time taken for the entire process of the external device identification process of the present embodiment is usually less than 2 seconds. In the case that the smart electronic device is muted, the input of the sound source recorded by the intelligent electronic device is a relatively low and relatively smooth sound, and in the case where the smart electronic device is set to be non-silent, when the music is played, the intelligent electronic device The volume of the input to the audio source will suddenly become larger; after repeated tests, the ratio of the average volume obtained in the two stages exceeds 7 times; the existing headphones receive the smart electronic device while the smart electronic device is muted. The volume of the input to the sound source is usually relatively stable. After repeated tests, the ratio of the volume average obtained in the two stages does not exceed 6 times; therefore, the ratio of the volume average value in different cases can be determined in this embodiment. It is accurately determined whether the external device of the intelligent electronic device is an external device provided with the above identification circuit, or is an external device such as an ordinary earphone.

In addition, it should be noted that, in the case where the external device is identified as the external device provided with the identification circuit described in the first embodiment, the information of the inserted external device that is the invalid earphone should be transmitted to the intelligent electronic device. Relevant parts in the system, such as notifying the operating system or notifying the application related to the voice operation; thus, when the operating system or related application performs voice-related operations (such as answering a call, etc.), the current through the earphone socket and the smart can be known. The external device connected to the electronic device is not a headset, so it switches to the built-in microphone of the smart electronic device instead of using the headset. microphone. Since the switch E1 in the first embodiment is in the off state, the audio signal output by the smart electronic device is played through the built-in microphone, and is not transmitted to the recording circuit through the earphone socket or the earphone plug, and passes through the recording circuit and the earphone plug. And the earphone socket is returned to the microphone. Therefore, the external device provided with the identification circuit described in the first embodiment does not affect the operation such as the normal call of the smart electronic device.

Embodiment 3: An external device identification method based on a headphone jack. The apparatus of this embodiment will be described in detail below with reference to Figs. 6 and 7.

In FIG. 6, after the headset plug of the external device is inserted into the earphone socket of the smart electronic device by receiving a notification sent by the operating system, etc., the smart electronic device is used to check whether the smart electronic device is performing voice related. Processing (such as ongoing call or recording, etc.), if it is determined that the intelligent electronic device is performing voice-related processing, after waiting for the voice-related processing to end, acquiring the current audio playback volume of the intelligent electronic device, and storing the current Audio playback volume, then triggering the intelligent electronic device to perform a recording operation; setting the current audio playback volume of the smart electronic device to 0 (ie, the smart electronic device is in a mute state), and waiting for the first predetermined time interval time1, timing acquisition through the recording The volume value of the obtained sound, for example, the volume value of the sound obtained by the recording every 70 milliseconds, and the volume average value AvgVolume1 is calculated for the obtained 10 volume values; in order to avoid the subsequent operation, there is a problem, and therefore, In the case where AvgVolume1 is 0, Setting AvgVolume1 to 1; after that, determining whether AvgVolume1 exceeds a predetermined volume value of 1000, and if the predetermined volume value is exceeded 1000, determining that the external device is not an external device provided with the identification circuit described in Embodiment 1 above, After the current audio playback volume of the device is restored to the current audio playback volume stored above, the identification process ends; if AvgVolume1 does not exceed the predetermined volume value of 1000, the subsequent determination operation is continued; after that, the current audio playback volume of the smart electronic device is turned on. Set to a second predetermined value Volume1, and play the first music built in the smart electronic device; after waiting for the second predetermined time interval time2, periodically obtain the volume value of the sound obtained by the recording, for example, obtaining the recording by using the recording every 70 milliseconds. The volume value of the sound, and the volume average value AvgVolume2 is calculated for the obtained 10 volume values; in order to avoid problems with subsequent operations, if the calculated AvgVolume2 is 0, AvgVolume2 can be set to 1; determine AvgVolume1 Does the relationship with AvgVolume2 satisfy Av? gVolume2>AvgVolume1*7, if the condition is met, it is determined that the external device is an external device provided with the identification circuit described in the first embodiment, and the current audio playback volume of the intelligent electronic device is restored to the above After the current audio playback volume is stored, the identification process ends; if the condition is not satisfied, it is determined that the external device is not the external device provided with the identification circuit described in the first embodiment, and the current electronic device is After the audio playback volume is restored to the current audio playback volume stored above, the recognition process ends.

In the present embodiment, the setting process of the first predetermined time interval time 1, the second predetermined time interval time2, and the second predetermined value Volume1 may be set by a process of initializing the setting of the external device provided with the above identification circuit. A specific example of the process of initializing the device in this embodiment is shown in FIG.

In FIG. 7, after the earphone plug of the external device provided with the above identification circuit is inserted into the earphone jack of the smart electronic device, the corresponding application in the smart electronic device is activated, and the initialization function in the application is clicked; the application can be adopted. Reading the smart electronic device log or the like to determine whether the smart electronic device is performing voice-related processing (such as playing music or making a call or recording, etc.), if it is determined that the smart electronic device is playing music, the application can prompt After the user closes the music being played, the initialization operation is performed. If it is determined that the smart electronic device is talking or recording, the application may prompt the user to wait for the call or perform the initialization operation after the recording is finished; if the intelligent electronic device is not performing voice related Processing, obtaining the current audio playback volume of the intelligent electronic device, and storing the current audio playback volume, and then setting the current audio playback volume of the smart electronic device to volume 1 (such as the minimum except for mute in the 15-level volume) Level volume) and play With the built-in music 2, after waiting for 500 milliseconds, the smart electronic device is triggered to perform the recording operation, and the timing is started; after waiting for 300 milliseconds, the volume value of the sound obtained by the recording is obtained, and it is judged whether the volume value is greater than 100, and the current time is Whether the timing value is less than 2 seconds, if the acquired volume value is not greater than 100 and the current timing value of the timing is less than 2 seconds, continue to obtain the volume value of the sound obtained by the recording and the above judgment operation; if the acquired volume value is greater than 100 or If the current timing value of the timing is not less than 2 seconds, the current timing value of the timing is taken as the first predetermined time interval time1, and the value of the first predetermined time interval time1 should be between 300 milliseconds and 2 seconds; And wait for 300 milliseconds; then, play the built-in music 1 of the application, and start timing, wait for 200 milliseconds, obtain the volume value of the sound obtained by the recording, and determine whether the volume value is greater than 100, and whether the current timing value of the timing is less than 1 second, if the acquired volume value is not greater than 100 and the current timing value of the timing is less than 1 second, the above acquisition is continued. The volume value of the sound obtained by the recording and the above-mentioned judging operation; if the acquired volume value is greater than 100 or the current timing value of the timing is not less than 1 second, the current timing value of the timing is taken as the second predetermined time interval time2, the second predetermined time The interval time2 should be between 200 milliseconds and 1 second; turn off the above music 1, and set the current audio playback volume of the smart electronic device to volume 0 (ie, mute), then wait for 300 milliseconds, then wait for the timing to pass. The volume value of the sound obtained by the recording, for example, the volume value of the sound obtained by the recording every 70 milliseconds, and the volume average value AvgVolume1 is calculated for the obtained plurality of (for example, 10) volume values; after that, the intelligent electronic device is The current audio playback volume is set to volume 1 and the first music built into the smart electronic device is played; after waiting for the second predetermined time interval of 200 milliseconds, the volume value of the sound obtained by the recording is periodically acquired, for example, every 70 milliseconds. The volume value of the sound obtained by recording, and for multiple acquired (such as 10 The volume value calculates the volume average AvgVolume2; determines whether AvgVolume1 and AvgVolume2 satisfy the condition of AvgVolume2>AvgVolume1*9, and if this condition is satisfied, the above volume 1 is set to the first predetermined value, at the current state of the intelligent electronic device After the audio playback volume is restored to the current audio playback volume stored above, the initialization process ends; if the condition is not met, the current audio playback volume of the smart electronic device is set to volume 2, and the timing is returned to the above-mentioned timing. The volume value of the obtained sound, and the volume average value AvgVolume2 and the steps of judging whether AvgVolume1 and AvgVolume2 satisfy the above conditions; and so on, until the relationship between AvgVolume1 and AvgVolume2 satisfies the condition of AvgVolume2>AvgVolume1*9, the current audio is played. After the volume is set to the first predetermined value and the current audio playback volume of the smart electronic device is restored to the current stored audio playback volume, the initialization process ends.

Embodiment 4: An external device identification device based on a headphone jack. The identification device is disposed in an intelligent electronic device, which may be an intelligent electronic device (such as a smart mobile phone or tablet using the Andriod operating system) using the Andriod operating system.

The apparatus of this embodiment will be described in detail below with reference to FIG.

The device shown in FIG. 8 mainly includes: a first setting module 700, a first obtaining module 710, a second setting module 720, a second obtaining module 730, and an identifying module 740. In addition, the device may further include: a first initializing module, The second initialization module and the third initialization module (not shown in FIG. 8).

The first setting module 700 is connected to the first obtaining module 710. The first setting module 700 is mainly configured to trigger the recording of the smart electronic device after the earphone socket of the smart electronic device is detected to be inserted into the external device, and set the current audio playback volume of the smart electronic device to a first predetermined value.

Specifically, in order to prevent the external device identification process of the device from affecting the ongoing call or recording of the smart electronic device, the first setting module 700 may insert the external device of the earphone socket of the smart electronic device (eg, by registering the listener) After the broadcast message of the operating system determines that the external device is inserted into the earphone socket of the smart electronic device according to the received message, detecting the current state of the smart electronic device (for example, by reading the current log of the intelligent electronic device) If the current state of the smart electronic device is detected as a voice-related state such as a call state or a recording state, the first setting module 700 should temporarily not set the current audio playback volume and trigger the recording. Operation, but waiting for the intelligent electronic device to end the voice-related operation (such as ending the call or ending the recording), the first setting module 700 resumes its operation of setting the current audio playback volume and triggering the recording.

Since the external device identification process of the device modifies the current audio playback volume of the smart electronic device, the first setting module 700 should acquire the smart electronic device before performing the current audio playback volume operation of setting the smart electronic device. The current audio playback volume, and the current audio playback volume is stored, so that after the identification module 740 performs the identification operation, the smart electronic device can also be The current audio playback volume of the device is restored to the audio playback volume before the external device recognition operation. That is, after the first setting module 700 stores the current audio playback volume of the smart electronic device, the smart electronic device is triggered to perform a recording operation, and the current audio playback volume of the smart electronic device is set to a first predetermined value.

The first predetermined value may be a minimum value of the smart electronic device (ie, a mute value), such as the first predetermined value is 0, that is, the first setting module 700 may set the smart electronic device to a mute state.

The operation of the first setting module 700 to trigger the intelligent electronic device to perform the recording operation and the current audio playback volume of the smart electronic device to be set to the first predetermined value may be limited without prioritization, for example, the first setting module 700 may perform simultaneously If the first setting module 700 can perform the recording operation, the first predetermined value setting operation is performed; and the first setting module 700 can also perform the setting operation of the first predetermined value, and then perform the recording operation. .

The operation of the first setting module 700 to trigger the intelligent electronic device to perform the recording operation is implemented by calling the recording function in the operating system of the smart electronic device. This embodiment does not limit the specific implementation manner in which the first setting module 700 triggers the intelligent electronic device to perform the recording operation.

The first acquisition module 710 is connected to the identification module 740 in addition to the first setting module 700. The first obtaining module 710 is mainly adapted to acquire a volume value of the sound obtained by the recording in the case of the first predetermined value.

Specifically, after the first setting module 700 triggers the smart electronic device to perform the recording operation, the first obtaining module 710 needs to acquire the sound obtained by the recording if the current audio playing volume of the smart electronic device is set to the first predetermined value. The volume value.

The first obtaining module 710 may acquire the volume value of the sound obtained by the recording after the smart electronic device is triggered to perform the recording operation and wait for a certain time. In a specific example, in a case where the first setting module 700 first triggers the smart electronic device to perform a recording operation, and then sets the current audio playback volume of the smart electronic device, the first obtaining module 710 may use the smart device in the first setting module 700. The current audio playback volume is set to a first predetermined value, and after waiting for the first predetermined time interval, an operation of acquiring the volume value of the sound obtained by the recording is performed.

The first obtaining module 710 may obtain a plurality of volume values of the sound obtained by the recording by using a timing acquisition manner, and calculate an average value of the plurality of volume values, and the calculated volume average value is mainly used by the subsequent identification module 740. The calculated comparison process, the calculated volume average may be referred to as a first volume average.

When the first acquisition module 710 calculates the first volume average, the identification module 740 may determine whether the first volume average is greater than a predetermined volume value (eg, 1000), if the first volume average is greater than a predetermined volume value (eg, greater than 1000) The identification module 740 can determine that the external device is not an external device provided with the identification circuit in the first embodiment, and the identification process of the external device ends; If the volume average is not greater than a predetermined value (e.g., less than or equal to 1000), the apparatus of the present embodiment should continue to perform the subsequent steps.

The predetermined volume value (for example, 1000) may be preset in the smart electronic device according to experience; in addition, the first predetermined time interval may be preset in the smart electronic device according to experience, or may be purposeful The actual situation of the intelligent electronic device is dynamically set in the smart electronic device.

A specific example of dynamically setting the first predetermined time interval for the actual situation of the smart electronic device is: setting the current audio playback volume of the smart electronic device may be a volume that the user can manually adjust by means of a button, etc., for example, in an intelligent electronic device. The volume that can be manually adjusted by the user through buttons or the like is divided into 15 levels (the intelligent mobile phone of the Andriod operating system has 15 levels of volume that can be manually adjusted by the user). The 15 levels can be referred to as volume 0 to volume 14, respectively. The volume 0 indicates silence; according to the order of volume 1 to volume 14, the sound corresponding to each of volume 1 to volume 14 gradually increases, and the volume corresponding to volume 14 is the loudest. In the case where the current audio playback volume is the above, the specific setting process of the first predetermined time interval includes: first, in the case that the smart electronic device is first connected to the external device having the above identification circuit of the present embodiment through the earphone plug and the earphone socket The device may perform an initial setting operation for the external device. Specifically, after the current audio playback volume of the intelligent electronic device is backed up, the first initialization module sets the current audio playback volume of the smart electronic device to a minimum level other than mute. Volume (ie, the above volume 1); then, the first initialization module triggers the electronic device to perform an operation of playing a locally stored audio signal (such as a second music built into the smart electronic device) and starts timing; waiting for a period of time (such as 500) After the millisecond, the first initialization module triggers the intelligent electronic device to record, and after waiting for a period of time (for example, 300 milliseconds), the first initialization module acquires the volume value of the sound obtained by the recording (for example, obtaining the volume value returned by the operating system) ), and determine whether the volume value is greater than a predetermined value (such as 100) to And whether the current timing value reaches a predetermined duration (for example, 2 seconds). If the acquired volume value is not greater than the predetermined value and the current timing value does not reach the predetermined duration, the first initialization module returns the volume value of the sound obtained by the recording and the The step of determining the volume value and the current timing value; if the volume value is greater than the predetermined value or the current timing value reaches the predetermined duration, the first initialization module sets the current timing value of the timing to the first predetermined time interval.

It can be seen from the above specific example that the specific value of the first predetermined time interval in this embodiment is set by the first initialization module to a value between the waiting duration and the predetermined duration, such as the minimum of the first predetermined time interval. The value is 300 milliseconds and its maximum value is 2 seconds.

In addition, in actual applications, the volume that the smart electronic device can provide for the user to manually adjust by means of a button or the like may be more or less. In order to adapt to different types of smart electronic devices, the current audio of the smart electronic device in this embodiment The playback volume may not be the volume that the user can manually adjust by pressing a button, etc., a specific example, the first initialization module will maximize the playback sound of the intelligent electronic device. The quantity is divided into 15 levels. If the maximum playback volume / 15 is calculated, the first initialization module sets the current audio playback volume of the intelligent electronic device according to the volume values of the divided levels.

The second setting module 720 is connected to the second obtaining module 730. The second setting module 720 is mainly adapted to set the current audio playback volume of the intelligent electronic device to a second predetermined value.

Specifically, after the first acquisition module 710 successfully acquires the volume value of the sound obtained by the recording for the first predetermined value, the second setting module 720 sets the current audio playback volume adjustment of the smart electronic device to a second predetermined value, and The second predetermined value is greater than the first predetermined value.

A specific example of dynamically setting a second predetermined value for the actual situation of the intelligent electronic device is: setting a first predetermined value to 0 (ie, the smart electronic device is in a mute state), and the third initialization module plays the current audio of the smart electronic device. The volume is set to a first predetermined value, and the third initialization module periodically acquires the volume value of the sound obtained by the recording (such as obtaining the volume value returned by the operating system), and calculates for the obtained multiple volume values (such as 10 volume values). The average value (recorded as the first average value); the third initialization module triggers the intelligent electronic device to play the local pre-stored audio signal (such as playing the first music), and sets the current audio playback volume of the smart electronic device to the volume 1 (eg, The minimum level of sound other than mute); then, the third initialization module periodically acquires the volume value of the sound obtained by the recording (such as obtaining the volume value returned by the operating system), and for the obtained multiple volume values (such as 10) The volume value is calculated as an average value (recorded as a second average value), after which the third initialization module determines whether the second average value is a predetermined multiple of the first average value. (The predetermined multiple should be greater than 7 times, if 9 times can be used), if the second average does not reach a predetermined multiple of the first average, the third initialization module sets the current audio playback volume of the smart electronic device to volume 2, And returning to the step of regularly obtaining the volume value of the sound obtained by the recording and calculating an average value (recorded as the second average value) for the obtained plurality of volume values and judging the multiple; if the second average value reaches the first average value When the multiple is predetermined, the third initialization module determines the current audio playback volume of the smart electronic device as a second predetermined value.

The second acquisition module 730 is connected to the identification module 740 in addition to the second setting module 720. The second acquisition module 730 is mainly adapted to play a predetermined audio signal, and in the case of the second predetermined value, acquire a volume value of the sound obtained by the recording.

Specifically, the second obtaining module 730 needs to acquire the volume value of the sound obtained by the recording if the current audio playback volume of the smart electronic device is adjusted to the second predetermined value by the second setting module 720.

The second obtaining module 730 can play a locally stored predetermined audio signal (such as the first music built in the smart electronic device) on the smart electronic device, and after waiting for the second predetermined time interval, perform the volume value of acquiring the sound obtained by the recording. operating.

The second obtaining module 730 can obtain a plurality of volume values (such as 10 volume values) of the sound obtained by the recording in a manner of timing acquisition, and calculate an average value (recorded as a second average value) for the obtained plurality of volume values. The average value of the volume calculated by the second acquisition module 730 is used for the comparison process of the subsequent identification module 740.

A specific example of dynamically setting the second predetermined time interval for the actual situation of the intelligent electronic device is: in the process of performing the initial setting operation for the external device by the device of the embodiment, the first predetermined time interval is set in the first initialization module. Afterwards, the second initialization module triggers the intelligent electronic device to play a preset audio signal (such as the first music built in the smart electronic device), and starts timing. After waiting for a period of time (such as waiting 200 milliseconds), the second initialization module acquires The volume value of the sound obtained by recording (such as obtaining the volume value returned by the operating system), and determining whether the volume value is greater than a predetermined value (such as 100) and whether the current timing value reaches another predetermined duration (such as 1 second), if The second initialization module returns the volume value of the sound obtained by the recording and the step of determining the volume value and the current timing value. If the volume value is greater than the predetermined value or the current timing value reaches another predetermined Length, the second initialization module current timing value of the timer is set to a second predetermined time interval.

It can be seen from the above specific example that the specific value of the second predetermined time interval in this embodiment is set by the second initialization module to a value between the waiting duration and another predetermined duration, such as the second predetermined time interval. The minimum value is 200 milliseconds and its maximum value is 1 second.

The identification module 740 is mainly adapted to determine whether the external device is an external device provided with the identification circuit described in the first embodiment, based on a comparison between the volume value acquired for the first predetermined value and the volume value acquired for the second predetermined value.

Specifically, the identification module 740 can determine whether the average value of the volume value calculated by the second obtaining module 730 for the second predetermined value (ie, the second average value) reaches the volume calculated by the first acquiring module 710 for the first predetermined value. Another predetermined multiple of the value (ie, the first average value described above) (eg, 7 times); if the second average value reaches 7 times the first average value, the identification module 740 determines that the external device is configured with the above The external device of the identification circuit of the first embodiment; if the second average value does not reach 7 times of the first average value, the identification module 740 determines that the external device is not the external device provided with the identification circuit described in the first embodiment. .

The entire process of the identification process of the external device of the device usually takes less than 2 seconds. When the smart electronic device is muted, the input of the audio source recorded by the intelligent electronic device is relatively low and compared. Smooth sound, while the smart electronic device is set to be non-silent, when the music is played, the volume of the audio input recorded by the intelligent electronic device suddenly becomes large; after several trials and verifications, the two stages are obtained. The ratio of the average value of the volume exceeds 7 times; the existing earphones in the case where the smart electronic device is muted, the volume of the input of the sound source received by the intelligent electronic device is generally relatively stable, and after several trials and verifications, the volume obtained in two stages is obtained. The ratio of the average value does not exceed 6 times; therefore, the device can accurately determine whether the external device of the intelligent electronic device is an external device provided with the above identification circuit by judging the ratio of the average value of the volume under different conditions, or other devices such as ordinary External devices such as headphones.

In addition, it should be noted that, when the identification module 740 recognizes that the external device is an external device provided with the identification circuit described in the first embodiment, the information that the inserted external device is an invalid earphone should be transmitted to the intelligent electronic device. The relevant part in the process, such as the identification module 740 notifying the operating system or notifying the application related to the voice operation, etc.; thus, when the operating system or related application performs the voice-related operation (such as answering a call, etc.), the current through the earphone can be known. The external device that connects the socket to the smart electronic device is not a headset, so it switches to the built-in microphone of the smart electronic device instead of the headset microphone. Since the switch E1 in the first embodiment is in the off state, the audio signal output by the smart electronic device is played through the built-in microphone, and is not transmitted to the recording circuit through the earphone socket or the earphone plug, and passes through the recording circuit and the earphone plug. And the earphone socket is returned to the microphone. Therefore, the external device provided with the identification circuit described in the first embodiment does not affect the operation such as the normal call of the smart electronic device.

In FIG. 9, the external device identification system based on the earphone socket mainly includes: an external device 800 and an intelligent electronic device 810; wherein the external device 800 is provided with the external device identification circuit based on the earphone socket described in the first embodiment, and the intelligent electronic device The device 810 is provided with the external device identification device based on the earphone socket described in the third embodiment, and the external device 800 is connected to the intelligent electronic device through the earphone plug.

The specific structure of the identification circuit in the external device 800 is as described in the first embodiment. The structure of the identification device in the smart electronic device 810 is as described in the second embodiment. For the operation performed by the identification device, refer to the second embodiment. The description in the third embodiment will not be repeated here.

The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general purpose systems can also be used with the teaching based on the teachings herein. The structure required to construct such a system is apparent from the above description. Moreover, the invention is not directed to any particular programming language. It is to be understood that the invention may be embodied in a variety of programming language, and the description of the specific language has been described above in order to disclose the preferred embodiments of the invention.

Those skilled in the art will appreciate that the modules in the devices of the embodiments can be adaptively changed and placed in one or more devices different from the embodiment. Can be practical Modules or units or components in the embodiments are combined into one module or unit or component, and further they may be divided into a plurality of sub-modules or sub-units or sub-components. In addition to such features and/or at least some of the processes or units being mutually exclusive, any combination of the features disclosed in the specification, including the accompanying claims, the abstract and the drawings, and any methods so disclosed, or All processes or units of the device are combined. Each feature disclosed in this specification (including the accompanying claims, the abstract and the drawings) may be replaced by alternative features that provide the same, equivalent or similar purpose.

In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features that are included in other embodiments and not in other features, combinations of features of different embodiments are intended to be within the scope of the present invention. Different embodiments are formed and formed. Any of the claimed embodiments can be used in any combination, as in the following claims.

The various component embodiments of the present invention may be implemented in hardware, or in a software module running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or digital signal processor (DSP) can be used in practice to implement the earphone socket-based external device identification device and the earphone socket-based external device identification system according to an embodiment of the present invention. Some or all of the features of some or all of the components. The invention can also be implemented as a device or device program (such as a computer program and a computer program product) for performing some or all of the methods described herein. Such a program implementing the invention may be stored on a computer readable medium or may be in the form of one or more signals. Such signals may be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

For example, FIG. 10 shows an electronic device in which the earphone socket-based external device identification method of the present invention can be implemented. The electronic device conventionally includes a processor 1210 and a computer program product or computer readable medium in the form of a memory 1220. The memory 1220 may be an electronic memory such as a flash memory, an EEPROM (Electrically Erasable Programmable Read Only Memory), an EPROM, a hard disk, or a ROM. Memory 1220 has a memory space 1230 for program code 1231 for performing any of the method steps described above. For example, storage space 1230 for program code may include various program codes 1231 for implementing various steps in the above methods, respectively. The program code can be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. Such a computer program product is typically a portable or fixed storage unit as described with reference to FIG. The storage unit may have a storage section or a storage space or the like arranged similarly to the storage 1220 in the electronic device of FIG. The program code can be compressed, for example, in an appropriate form. In general, the storage unit comprises a program 1231' for performing the steps of the method according to the invention, ie a code readable by a processor such as 1210, which when executed by the electronic device causes the electronic device to perform the above The party described The various steps in the law.

"an embodiment," or "an embodiment," or "an embodiment," In addition, it is noted that the phrase "in one embodiment" is not necessarily referring to the same embodiment.

In the description provided herein, numerous specific details are set forth. However, it is understood that the embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of the description.

It should be noted that the above-described embodiments are not intended to limit the invention, and that alternative embodiments may be devised without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as a limitation. The word "comprising" or "comprising" does not exclude the presence of the elements or the steps in the claims. The word "a" or "an" The invention can be implemented by means of hardware comprising several distinct elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means can be embodied by the same hardware item. The use of the words first, second, and third does not indicate any order. These words can be interpreted as names.

In addition, it should be noted that the language used in the specification has been selected for the purpose of readability and teaching, and is not intended to be construed or limited. Therefore, many modifications and changes will be apparent to those skilled in the art without departing from the scope of the invention. The disclosure of the present invention is intended to be illustrative, and not restrictive, and the scope of the invention is defined by the appended claims.

Claims

An external device identification circuit based on a headphone socket, comprising: a headphone plug and a recording circuit;

The earphone plug has a channel connection end, a microphone connection end and a ground end;

The recording circuit has a first connecting end, a second connecting end and a third connecting end;

The first connection end is connected to the channel connection end, the second connection end is connected to the microphone connection end, and the third connection end is connected to the ground connection end;

The recording circuit is connected to a microphone in the smart electronic device through the earphone plug and a headphone jack in the smart electronic device, and the recording circuit forms a microphone circuit together with the earphone plug, the earphone socket and the microphone.
The circuit of claim 1 wherein said microphone circuit comprises: a condenser microphone circuit.
The circuit of claim 2 wherein said recording circuit comprises: a first capacitor, a first resistor, and a second resistor;

One end of the first capacitor is the first connection end, the other end is respectively connected to the first resistor and the second resistor, and the first capacitor is connected in series with the first resistor and the second resistor respectively;

One end of the first resistor is the second connection end, and the other end is connected to the first capacitor;

One end of the second resistor is the third connection end, and the other end is connected to the first capacitor;

The first resistor and the second resistor are connected in parallel.
The circuit of claim 2, wherein the recording circuit comprises: a third resistor, a third capacitor, and a fourth capacitor;

One end of the third resistor is the first connection end, the other end is respectively connected to the third capacitor and the fourth capacitor, and the first resistor is connected in series with the third capacitor and the fourth capacitor respectively;

One end of the third capacitor is the second connection end, and the other end is connected to the third resistor;

One end of the fourth capacitor is the third connection end, and the other end is connected to the third resistor;

The third capacitor and the fourth capacitor are connected in parallel.
The circuit of claim 2, wherein the recording circuit comprises: a fourth resistor, a fifth resistor, and a sixth resistor;

One end of the fourth capacitor is the first connection end, the other end is respectively connected to the fifth resistor and the sixth resistor, and the fourth resistor is connected in series with the fifth resistor and the sixth resistor respectively;

One end of the fifth resistor is the second connection end, and the other end is connected to the sixth resistor;

One end of the sixth resistor is the third connection end, and the other end is connected to the fifth resistor;

The fifth resistor and the sixth resistor are connected in parallel.
The circuit of any one of claims 1 to 5, wherein the recording circuit further comprises: a switch, and the switch is connected in series between the second connection end and the third connection end.
The circuit according to any one of claims 1 to 5, wherein said channel connection end comprises: a left channel connection end and a right channel connection end, and said first connection end and said left sound end The channel connection and/or the right channel connection are connected.
A method for identifying an external device based on a headphone jack, comprising:

After detecting that the earphone socket of the smart electronic device is inserted into the external device, triggering the recording of the smart electronic device, and setting the current audio playback volume of the smart electronic device to a first predetermined value;

Obtaining a volume value of the sound obtained by the recording in the case of the first predetermined value;

Setting a current audio playback volume of the smart electronic device to a second predetermined value;

Playing a predetermined audio signal, and in the case of the second predetermined value, acquiring a volume value of the sound obtained by the recording;

Determining whether the external device is an external device provided with a recording loop and a headphone plug according to a comparison between a volume value acquired for the first predetermined value and a volume value acquired for the second predetermined value, and the recording loop and the The earphone plug and the headphone jack of the smart electronic device together with the microphone form a microphone circuit.
The method of claim 8, wherein the setting the current audio playback volume of the intelligent electronic device to a first predetermined value comprises:

Obtaining a current audio playback volume of the smart electronic device and storing, and then setting a current audio playback volume of the smart electronic device to a first predetermined value;

And the method further includes:

After identifying the external device, the current audio playback volume of the smart electronic device is set to the stored current audio playback volume.
The method of claim 8, wherein in the case of the first predetermined value, obtaining a volume value of the sound obtained by the recording comprises:

After the current audio playback volume of the smart electronic device is set to a first predetermined value, and after waiting for the first predetermined time interval, the volume value of the sound obtained by the recording is acquired.
The method of claim 10 wherein the first predetermined time interval is set by:

Setting a current audio playback volume of the smart electronic device to a minimum volume value other than mute;

Play an audio signal, trigger the recording of the intelligent electronic device, and start timing;

The volume value of the sound obtained by the recording is monitored, and in the case where the monitored volume value is greater than the predetermined volume value, the current timing value is taken as the first predetermined time interval.
The method of claim 8, wherein, in the case of the second predetermined value, obtaining a volume value of the sound obtained by the recording comprises:

After the predetermined audio signal is played and waits for the second predetermined time interval, the volume value of the sound obtained by the recording is acquired.
The method of claim 12 wherein the second predetermined time interval is set by:

Setting a current audio playback volume of the smart electronic device to a minimum volume value other than mute;

Playing the predetermined audio signal, triggering recording of the intelligent electronic device, and starting timing;

The volume value of the sound obtained by the recording is monitored, and in the case where the monitored volume value is greater than the predetermined volume value, the current timing value is taken as the second predetermined time interval.
The method according to any one of claims 8 to 13, wherein the obtaining the volume value of the sound obtained by the recording comprises:

The volume value returned by the operating system of the intelligent electronic device is periodically acquired, and an average value is calculated for the obtained predetermined number of volume values.
The method of claim 14, wherein the determining whether the external device is provided with a recording loop and an earphone according to a comparison between a volume value acquired for the first predetermined value and a volume value acquired for the second predetermined value The external devices of the plug include:

Determining whether an average value of the volume values calculated for the second predetermined value reaches seven times an average value of the volume values calculated for the first predetermined value;

If it is seven times, it is determined that the external device is an external device provided with the identification circuit;

If it is not seven times, it is determined that the external device is not an external device provided with the identification circuit.
The method of claim 15 wherein said first predetermined value is zero and said second predetermined value is set by:

Setting a current audio playback volume of the smart electronic device to a first predetermined value, acquiring a volume value of the sound obtained by the recording, and calculating an average value for the acquired predetermined number of volume values;

Playing a predetermined audio signal;

Adjusting the current audio playback volume to the next-level volume value, obtaining the volume value of the sound obtained by the recording, and calculating an average value for the obtained predetermined number of volume values;

Determining whether an average value of the volume values calculated for the adjusted current audio playback volume reaches a predetermined multiple of an average value of the volume values calculated for the first predetermined value, wherein the predetermined multiple is greater than seven times;

If the predetermined multiple is reached, the adjusted current audio playback volume is taken as the second predetermined value;

If the predetermined multiple is not reached, return to the current audio playback volume to adjust to the next level The step of the volume value.
The method of claim 15 wherein the method further comprises:

In a case where it is determined that the average value of the volume values calculated for the first predetermined value exceeds a predetermined threshold, it is determined that the external device is not an external device provided with the identification circuit.
The method according to claim 8, wherein said external device is an external device provided with the identification circuit of any one of A1 to A7.
An external device identification device based on a headphone jack, comprising:

The first setting module is configured to trigger the recording of the smart electronic device after the earphone socket of the smart electronic device is inserted into the external device, and set the current audio playback volume of the smart electronic device to a first predetermined value;

a first acquiring module, configured to acquire a volume value of the sound obtained by the recording in the case of the first predetermined value;

a second setting module, configured to set a current audio playback volume of the smart electronic device to a second predetermined value;

a second acquiring module, configured to play a predetermined audio signal, and obtain, in the case of the second predetermined value, a volume value of the sound obtained by the recording;

An identification module, configured to determine, according to a comparison between a volume value acquired for the first predetermined value and a volume value acquired for the second predetermined value, whether the external device is an external device provided with a recording loop and a headphone plug, and A recording circuit forms a microphone circuit with the earphone plug and the earphone jack and microphone of the smart electronic device.
The apparatus of claim 19, wherein the setting the current audio playback volume of the intelligent electronic device to a first predetermined value comprises:

Obtaining a current audio playback volume of the smart electronic device and storing, and then setting a current audio playback volume of the smart electronic device to a first predetermined value;

And the identification module is further adapted to:

After identifying the external device, the current audio playback volume of the smart electronic device is set to the stored current audio playback volume.
The apparatus according to claim 19, wherein said obtaining a volume value of the sound obtained by the recording in the case of said first predetermined value comprises:

After the current audio playback volume of the smart electronic device is set to a first predetermined value, and after waiting for the first predetermined time interval, the volume value of the sound obtained by the recording is acquired.
The device of claim 21, wherein the device further comprises:

a first initialization module, configured to set a current audio playback volume of the smart electronic device to a minimum volume value other than mute; play an audio signal, trigger an intelligent electronic device to record, and start counting And monitoring a volume value of the sound obtained by the recording, in a case where the monitored volume value is greater than a predetermined volume value, using the current timing value as the first predetermined time interval.
The apparatus according to claim 19, wherein said obtaining a volume value of the sound obtained by the recording in the case of said second predetermined value comprises:

After the predetermined audio signal is played and waits for the second predetermined time interval, the volume value of the sound obtained by the recording is acquired.
The device of claim 23, wherein the device further comprises:

a second initialization module, configured to set a current audio playback volume of the smart electronic device to a minimum volume value other than mute; play the predetermined audio signal, trigger an intelligent electronic device to record, and start timing; monitoring by recording The volume value of the obtained sound, in the case where the monitored volume value is greater than the predetermined volume value, the current timing value is taken as the second predetermined time interval.
The apparatus according to any one of claims 19 to 24, wherein said obtaining a volume value of the sound obtained by the recording comprises:

The volume value returned by the operating system of the intelligent electronic device is periodically acquired, and an average value is calculated for the obtained predetermined number of volume values.
The apparatus according to claim 25, wherein said determining whether said external device is provided with a recording circuit and an earphone according to a comparison between a volume value acquired for the first predetermined value and a volume value acquired for the second predetermined value The external devices of the plug include:

Determining whether an average value of the volume values calculated for the second predetermined value reaches seven times an average value of the volume values calculated for the first predetermined value;

If it is seven times, it is determined that the external device is an external device provided with the identification circuit;

If it is not seven times, it is determined that the external device is not an external device provided with the identification circuit.
The apparatus of claim 26, wherein the first predetermined value is 0, and the apparatus further comprises:

a third initialization module, configured to set a current audio playback volume of the smart electronic device to a first predetermined value, acquire a volume value of the sound obtained by the recording, and calculate an average value for the obtained predetermined number of volume values; Predetermining the audio signal; adjusting the current audio playback volume to the next-level volume value, obtaining the volume value of the sound obtained by the recording, and calculating an average value for the obtained predetermined number of volume values;

Determining whether an average value of the volume values calculated for the adjusted current audio playback volume reaches a predetermined multiple of an average value of the volume values calculated for the first predetermined value, wherein the predetermined multiple is greater than seven times;

If the predetermined multiple is reached, the adjusted current audio playback volume is used as the second pre- Value;

If the predetermined multiple is not reached, return to the step of adjusting the current audio playback volume to the next volume value.
The apparatus of claim 26 wherein said identification module is further adapted to:

In a case where it is determined that the average value of the volume values calculated for the first predetermined value exceeds a predetermined threshold, it is determined that the external device is not an external device provided with the identification circuit.
The apparatus according to claim 19, wherein said external device is an external device provided with the identification circuit of any one of A1 to A7.
An external device identification system based on a headphone jack, comprising: an external device and an intelligent electronic device;

The external device is provided with the identification circuit according to any one of claims 1-7;

The earphone socket-based external device identification device according to any one of claims 19-29 is provided in the smart electronic device.
A computer program comprising computer readable code for causing an external device identification method according to any one of claims 8-18 to be performed when the electronic device runs the computer readable code.
A computer readable medium storing the computer program of claim 31.