WO2018082233A1 - Apparatus and method for achieving audio conversion stereo - Google Patents

Abstract

Disclosed is an apparatus and method for achieving audio frequency conversion stereo. The apparatus comprises: a processor and a battery back cover. The processor processes an audio signal into a first sound channel signal and a second sound channel signal, and determines whether a second sound channel loudspeaker is mounted on the battery back cover. The first sound channel signal and the second sound channel signal are selected, according to a judgment result, to play by the processor, or the first sound channel signal and the second sound channel signal are respectively played by the processor and the battery back cover. In the apparatus, the first sound channel signal is played by a first channel loudspeaker of the processor; the second sound channel signal is played by the second channel loudspeaker of the battery back cover; sounds are played by two loudspeakers, i.e., the sounds is from different sound sources, so that a stereo effect can be achieved; and the other loudspeaker is extended in the form of an accessory of the battery back cover, so that less internal space is occupied.

Description

Device and method for realizing audio conversion stereo Technical field

The present invention relates to the field of mobile terminal technologies, and in particular, to an apparatus and method for implementing audio single-ended transform stereo.

Background technique

Human hearing has the ability to distinguish the position of the sound source. Especially when there are multiple sound sources simultaneously, people can perceive the position distribution of each sound source in space. From this perspective, all the sounds emitted by nature are stereo, such as thunder, train, wind, rain and so on.

If the natural stereo is recorded and amplified, and then reproduced, all the sounds are released from a speaker, and the original sense of space disappears. This playback sound is mono; if the entire system can be recorded from recording to playback, To some extent, the original sense of space is restored, and the reproduction of such spatial distribution characteristics such as the degree of orientation of the movement is claimed to be stereo. Compared with mono, stereo has the following advantages: (1) having the sense of orientation and distribution of each sound source; (2) improving the clarity and intelligibility of information; (3) improving the sense of presence and hierarchy of the program. And transparency.

The existing external speakers are mostly mono, single speaker configurations, lacking a sense of presence. Dual-speaker stereo boosts volume and provides a more natural sound field experience, but is limited by slimming and there is no extra space to assemble dual speakers on the unit.

Therefore, the prior art has yet to be improved and improved.

Summary of the invention

In view of the deficiencies of the prior art, the present invention aims to provide an apparatus and method for realizing audio conversion stereo, and expanding a single speaker in the form of a battery back cover accessory to realize audio mono conversion to two-channel stereo to solve the prior art. The technical problem that the assembled dual speakers are limited by the space of the slimming of the mobile terminal on the whole machine.

The technical solution of the present invention is as follows:

A device for implementing audio conversion stereo, comprising: a processor and a battery back cover;

The processor processes the audio signal into a first channel signal and a second channel signal and determines whether the battery back cover mounts the second channel speaker, and selects the first channel signal and the second channel signal according to the determination result. Both are played by the processor, or the first channel signal and the second channel signal are respectively played by the processor and the battery back cover.

The device for implementing audio conversion stereo, wherein the processor includes a sound processing module, a mode switching module, a playing module, and a first channel speaker;

a sound processing module, configured to process the audio signal into a first channel signal and a second channel signal;

The mode switching module is configured to determine whether the battery back cover is mounted on the second channel speaker according to the high and low levels of the input detection signal, and switch the play mode of the mobile terminal according to the determination result to open and close the audio power amplifier module;

a playing module, configured to select, according to an open/close state of the audio power amplifier module, the first channel signal and the second channel signal to be played by the first channel speaker in the processor, or the first channel signal and the second channel The signals are respectively played by the first channel speaker in the processor and the second channel speaker in the battery back cover.

The device for implementing audio conversion stereo, wherein the battery back cover comprises an audio power amplifier module, an ID recognition module, and a second channel speaker;

An audio power amplifier module for performing power amplification on the second channel signal;

The ID identification module is configured to output a detection signal corresponding to the high and low levels according to whether the battery back cover is mounted on the second channel speaker.

The device for implementing audio to convert stereo, wherein the mode switching module specifically includes:

The low level unit is configured to determine that the mobile terminal does not mount the second channel speaker when the input detection signal is low, switch the play mode of the mobile terminal to mono, single speaker, and turn off the audio power amplifier module. ;

The high level unit is configured to determine that the mobile terminal has mounted the second channel speaker when the input detection signal is high level, switch the play mode of the mobile terminal to two channels, dual speakers, and turn on the audio power amplifier module. .

The device for implementing audio to convert stereo, wherein the playing module specifically includes:

a first playing unit, configured to simultaneously input the first channel signal and the second channel signal into the first channel speaker of the processor when the audio power amplifier module is turned off, and play the first channel signal;

a second playing unit, configured to input the first channel signal into the first channel speaker of the processor for playing when the audio power amplifier module is turned on, and input the second channel signal to the second channel speaker of the battery back cover Play in.

A method for implementing audio conversion stereo, wherein the method comprises:

A. The processor processes the audio signal into a first channel signal and a second channel signal;

B. judging whether the back cover of the battery is mounted on the second channel speaker, and selecting, according to the judgment result, that the first channel signal and the second channel signal are both played by the processor, or the first channel signal and the second channel signal are respectively Played by the processor and battery back cover.

The method for implementing audio to transform stereo, wherein the step B specifically includes:

B1, determining whether the battery back cover is mounted on the second channel speaker according to the high and low levels of the input detection signal, and switching the play mode of the mobile terminal according to the determination result to open and close the audio power amplifier module;

B2, according to the opening and closing state of the audio power amplifier module, selecting to play the first channel signal and the second channel signal by the first channel speaker in the processor, or the first channel signal and the second channel signal respectively The first channel speaker in the processor and the second channel speaker in the battery back cover are played.

The method for implementing audio to transform stereo, wherein the step B1 specifically includes:

B11. According to whether the back cover of the battery is mounted, the detection signal corresponding to the high and low level is outputted by the second channel speaker;

B12. When the input detection signal is low, it is determined that the mobile terminal does not mount the second channel speaker, and the playback mode of the mobile terminal is switched to mono, single speaker, and the audio power amplifier module is turned off;

B13. When the input detection signal is high level, it is determined that the mobile terminal has mounted the second channel speaker, and the playback mode of the mobile terminal is switched to two channels, two speakers, and the audio power amplifier module is turned on.

The method for implementing audio to transform stereo, wherein the step B2 specifically includes:

B21, when the audio power amplifier module is turned off, simultaneously input the first channel signal and the second channel signal into the first channel speaker in the processor, and play the first channel signal;

B22. When the audio power amplifier module is turned on, the first channel signal is input to the first channel speaker of the processor for playing, and the second channel signal is input to the second channel speaker of the battery back cover for playing.

The method for implementing audio conversion stereo, wherein the step B22 further comprises: performing power amplification on the second channel signal by using the audio power amplifier module.

[Advantageous Effects] The present invention provides an apparatus and method for realizing audio conversion stereo, in which a first channel signal is played by a first channel speaker of a mobile terminal processor, and a second channel is played by a second channel speaker of a battery back cover. The channel signal, the sound is played through two speakers, that is, the sound comes from different sound sources, and the stereo effect can be realized; the speaker of the other channel is expanded in the form of a battery back cover accessory, without occupying too much internal space of the mobile terminal; The channel is stereo, and the two channels are small compared to the multi-channel, which is more convenient to carry around.

DRAWINGS

FIG. 1 is a structural diagram of an apparatus for implementing audio conversion stereo provided by the present invention.

2 is a flow chart of a method for implementing audio conversion stereo provided by the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

The present invention provides an apparatus and method for realizing audio conversion stereo. In order to make the objects, technical solutions and effects of the present invention more clear and clear, the present invention will be further described in detail below. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

When all the sounds are played from one speaker, the sound is played mono; if you want stereo, you need to play the audio signal of the sound through multiple speakers. The present invention provides a way to extend a one-way speaker in the form of a battery back cover accessory and to match the speaker on the mobile terminal to form a two-channel speaker for stereo sound. The device for realizing audio conversion stereo provided by the present invention, the device can be set On mobile phones, computers, ipads and other mobile terminals. FIG. 1 is a structural diagram of an apparatus for implementing audio conversion stereo provided by the present invention, the apparatus comprising: a processor 100 and a battery back cover 200; the processor supplies power to a battery back cover; The battery back cover is common;

The processor 100 includes a sound processing module 110, a mode switching module 120, a playing module 130, and a first channel speaker 140. The sound processing module, the mode switching module, and the playing module are integrated on a PCB of the mobile terminal.

The battery back cover 200 includes an audio power amplifier module 210, an ID recognition module 220, and a second channel speaker 230. The ID recognition module 210 and the audio power amplifier module 220 are integrated on a PCB of the battery back cover.

When performing audio playback, the sound processing module 110 processes the audio signal into a first channel signal and a second channel signal; meanwhile, the ID recognition module 210 outputs a corresponding high and low level according to whether the battery back cover is mounted on the second channel speaker. Detection signal. The detection signal is input to the processor 110. The mode switching module 120 in the processor 110 determines whether the battery back cover is mounted on the second channel speaker according to the high and low levels of the input detection signal, and switches the playback of the mobile terminal according to the determination result. Mode to open and close the audio power amplifier module. When the input detection signal is low, the low level unit in the mode switching module 120 determines that the mobile terminal does not mount the second channel speaker, switches the playback mode of the mobile terminal to mono, single speaker, and turns off the audio. a power amplifier module; when the audio power amplifier module 220 is turned off, the first playback unit in the playback module 130 simultaneously inputs the first channel signal and the second channel signal into the first channel speaker 140 of the processor 100, and One channel signal is played. When the input detection signal is at a high level, the high level unit in the mode switching module 120 determines that the mobile terminal has mounted the second channel speaker 230, switches the play mode of the mobile terminal to two channels, dual speakers, and turns on. The audio power amplifier module 220; when the audio power amplifier module 220 is turned on, the second playback unit in the playback module 130 inputs the first channel signal into the first channel speaker 140 of the processor 100 for playback, and the second channel signal input Power amplification is performed into the audio power amplifier module 220 in the battery back cover 200, and input to the second channel speaker for playback.

Based on the foregoing apparatus for implementing audio conversion stereo, the present invention also provides a method for implementing audio conversion stereo. As shown in FIG. 2, the method includes:

S1. The processor processes the audio signal into a first channel signal and a second channel signal;

S2: determining whether the battery back cover is mounted on the second channel speaker, and selecting, according to the determination result, that the first channel signal and the second channel signal are both played by the processor, or the first channel signal and the second channel signal are respectively Played by the processor and battery back cover.

A channel is a separate audio signal that is captured or played back in different spatial locations during recording or playback, so the number of channels is the number of sources when the sound is recorded or the number of speakers corresponding to the playback. In this embodiment, the sound is played through two channels of speakers, and the audio signal of the sound is processed into two channel signals when the sound recording is required. The step S1 specifically includes:

When recording the sound, recording is performed at two different positions, and the audio signal input to the mobile terminal includes the first channel signal and the second channel signal. The first channel signal is a left channel signal, and the second channel signal is a right channel signal; when the first channel signal is a right channel signal, the second channel signal is a left channel signal.

Further, a speaker on the back cover of the battery is attached. When the second channel speaker is mounted on the back cover of the battery, the device includes two speakers, and the two speakers can play stereo; when the battery back cover If the second channel speaker is not mounted, the device only contains one channel speaker, and only one channel can be played through one channel speaker. After processing the audio signal into two channel signals, it is necessary to determine whether the battery back cover is mounted with the second channel speaker, and then the first channel signal and the second channel signal are input to the processor. In the above, the first channel signal and the second channel signal are respectively input to the processor and the battery back cover for playing, and the step S2 specifically includes:

Step 21: Determine whether the battery back cover mounts the second channel speaker according to the high and low levels of the input detection signal, and switch the play mode of the mobile terminal according to the determination result to open and close the audio power amplifier module.

The ID identification module outputs a detection signal corresponding to the high and low levels according to whether the second channel speaker is mounted, and feeds the detection signal to the mode switching module through the ID identification module.

The minimum input high voltage V0 is set. When the voltage of the input detection signal is greater than V0, the input detection signal is a high voltage; when the voltage of the input detection signal is less than V0, the input detection signal is a low voltage.

When the mode switching module receives the input detection signal to be low level, it can be determined that the mobile terminal does not mount the second channel speaker. At this time, the mobile terminal only includes one channel speaker, and the mobile terminal is switched. The playback mode is mono, single speaker; the second channel signal does not need to be played through the second channel speaker, then the audio power amplifier module that powers the second channel signal is turned off.

When the mode switching module receives the input detection signal to a high level, it can be determined that the mobile terminal has mounted the second channel speaker. At this time, the mobile terminal includes two channels, that is, the first channel in the processor. The second channel speaker in the speaker and the battery back cover switches the playback mode of the mobile terminal to two channels and two speakers; at this time, the second channel signal needs to be played through the second channel speaker, then the second channel is turned on. An audio power amplifier module that performs power amplification on a channel signal.

Step 22, according to the opening and closing state of the audio power amplifier module, selecting to select the first channel signal and the second channel signal by the first channel speaker in the processor, or the first channel signal and the second channel signal respectively Played by the first channel speaker in the processor and the second channel speaker in the battery back cover.

Further, after determining the playing mode of the mobile terminal and the opening and closing state of the audio power amplifier module, the first channel signal and the second channel signal in the audio are input into the corresponding speaker according to the opening and closing state of the audio power amplifier module. The step 22 includes:

Step 221: When the audio power amplifier module is turned off, simultaneously input the first channel signal and the second channel signal into the first channel speaker in the processor, and play the first channel signal;

When the audio power amplifier module is turned off, only one first channel speaker is included in the device. Both the first channel speaker and the second channel speaker are input to the first channel speaker, but only the first channel signal can be played in the first channel speaker, and the second channel signal is not played.

At this time, only the first channel signal is played through the first channel speaker, and the sound played by one channel speaker is a mono sound effect.

When the audio power amplifier module is turned on, the first channel signal is input to the first channel speaker of the processor for playing, and the second channel signal is input to the second channel speaker of the battery back cover for playing.

When the audio power amplifier module is turned on, the device includes two speakers, one is the first channel speaker in the processor, and the other is the second channel speaker in the battery back cover.

When the audio power amplifier module is switched to a two-channel, two-speaker, the first channel signal and the second channel signal are respectively input into the first channel speaker and the second channel speaker for playback.

The first channel signal is directly input to the first channel speaker for playing; and the second channel signal is transmitted to the audio power amplifier module, and the second channel signal is power amplified by the audio power amplifier module, and the amplified first The two-channel signal is input to the second channel speaker for playback.

At this time, the first channel signal is played in the first channel speaker, and the second channel signal is played in the second channel speaker, and the sound played by the two channels forms a stereo effect.

The first channel speaker is included in the processor and is the main channel speaker. The first channel speaker can be a left channel speaker or a right channel speaker. When the first channel speaker is a left channel speaker, the second channel speaker is a right channel speaker, and the first channel signal of the left channel signal is input to the first channel speaker of the left channel speaker; When the first channel speaker is a right channel speaker, the second channel speaker is a left channel speaker, and the first channel signal for the right channel signal is input to the first channel speaker that is a right channel speaker.

The specific examples given below are further explained by the method as described above.

Embodiment 1: The first channel speaker of the apparatus for realizing audio conversion stereo in the embodiment 1 is a left channel speaker, and the second channel speaker is a right channel speaker. Set the threshold voltage V0 to 3.5V.

S11. When starting music playing, processing the music audio signal into a left channel signal and a right channel signal;

S12. Determine a high level and a low level of the input detection signal;

The processor of the mobile terminal supplies power to the battery back cover. The input voltage is 4V. At this time, if the input voltage is greater than the threshold voltage V0, the input detection signal is a high level signal.

S13. Determine whether the rear cover of the battery is mounted with the second channel speaker, and control the play mode of the mobile terminal and the open and close state of the audio power amplifier module.

When the input detection signal is a high level signal, the device is mounted with a second channel speaker, which is a second channel speaker, which is a right channel speaker. At this time, the playback mode of the mobile terminal is controlled to be two channels, two speakers, and the audio power amplifier module is turned on.

S14. The first channel signal and the second channel signal are both played by the processor, or the first channel signal and the second channel signal are respectively played by the processor and the battery back cover.

When the audio power amplifier module is turned on, the left channel signal in the music audio signal is input to the left channel speaker of the processor for playing; the right channel signal in the music audio signal is amplified by the audio power amplifier module, and then input to Play in the right channel speaker of the battery back cover.

Embodiment 2: The first channel speaker of the apparatus for realizing audio conversion stereo in the embodiment 2 is a left channel speaker, and the second channel speaker is not mounted. Set the threshold voltage V0 to 3.5V.

S11', when the music playing is started, the music audio signal is processed into a left channel signal and a right channel signal;

S12', determining whether the input detection signal is high or low;

The processor of the mobile terminal supplies power to the battery back cover. The input voltage is 0.25V. At this time, if the input voltage is less than the threshold voltage V0, the input detection signal is a low level signal.

S13', judging whether the battery back cover is mounted with the second channel speaker, and controlling the play mode of the mobile terminal and the opening and closing state of the audio power amplifier module.

When the input detection signal is a low level signal, the device does not mount the second channel speaker. At this time, the playback mode of the mobile terminal is mono, single speaker, and the audio power amplifier module is turned off.

S14', the first channel signal and the second channel signal are both played by the processor, or the first channel signal and the second channel signal are respectively played by the processor and the battery back cover.

When the audio power amplifier module is turned off, the left channel signal and the right channel signal in the music audio signal are input into the left channel speaker of the processor, and the left channel speaker plays only the left channel signal.

In summary, the present invention provides an apparatus and method for implementing audio conversion stereo, in which a first channel signal is played by a first channel speaker of the processor, and a second channel is played by a second channel speaker of the battery back cover. Channel signal, the sound is played through two speakers, that is, the sound comes from different sound sources, can achieve stereo effect; expand the other channel speaker in the form of battery back cover attachment, without occupying too much internal space; through two channels To achieve stereo, the dual channel is small compared to the multi-channel, which is more convenient to carry around.

It should be understood that the application of the present invention is not limited to the above examples, and one of ordinary skill in the art will recognize Modifications and variations are possible in light of the above description, and all such modifications and changes come within the scope of the appended claims.

Claims (17)

A device for implementing audio conversion stereo, comprising: a processor and a battery back cover; The processor processes the audio signal into a first channel signal and a second channel signal and determines whether the battery back cover mounts the second channel speaker; and selects the first channel signal and the second channel signal according to the determination result Both are played by the processor, or the first channel signal and the second channel signal are respectively played by the processor and the battery back cover. The apparatus for implementing audio conversion stereo according to claim 1, wherein the processor comprises a sound processing module, a mode switching module, a playing module, and a first channel speaker; a sound processing module, configured to process the audio signal into a first channel signal and a second channel signal; The mode switching module is configured to determine whether the battery back cover is mounted on the second channel speaker according to the high and low levels of the input detection signal, and switch the play mode of the mobile terminal according to the determination result to open and close the audio power amplifier module; a playing module, configured to select, according to an open/close state of the audio power amplifier module, the first channel signal and the second channel signal to be played by the first channel speaker in the processor, or the first channel signal and the second channel The signals are respectively played by the first channel speaker in the processor and the second channel speaker in the battery back cover. The apparatus for implementing audio conversion stereo according to claim 1, wherein the battery back cover comprises an audio power amplifier module, an ID recognition module, and a second channel speaker; An audio power amplifier module for performing power amplification on the second channel signal; The ID identification module is configured to output a detection signal corresponding to the high and low levels according to whether the battery back cover is mounted on the second channel speaker. An apparatus for implementing audio conversion stereo according to claim 2, wherein The mode switching module specifically includes: The low level unit is configured to determine that the mobile terminal does not mount the second channel speaker when the input detection signal is low, switch the play mode of the mobile terminal to mono, single speaker, and turn off the audio power amplifier module. ; The high level unit is configured to determine that the mobile terminal has mounted the second channel speaker when the input detection signal is high level, switch the play mode of the mobile terminal to two channels, dual speakers, and turn on the audio power amplifier module. . An apparatus for implementing audio conversion stereo according to claim 2, wherein The playing module specifically includes: a first playing unit, configured to simultaneously input the first channel signal and the second channel signal into the first channel speaker of the processor when the audio power amplifier module is turned off, and play the first channel signal; a second playing unit, configured to input the first channel signal into the first channel speaker of the processor for playing when the audio power amplifier module is turned on, and input the second channel signal to the second channel speaker of the battery back cover Play in. A method for implementing audio conversion stereo, wherein the method comprises: A. The processor processes the audio signal into a first channel signal and a second channel signal; B. judging whether the back cover of the battery is mounted on the second channel speaker, and selecting, according to the judgment result, that the first channel signal and the second channel signal are both played by the processor, or the first channel signal and the second channel signal are respectively Played by the processor and the battery back cover; The step B specifically includes: B1, determining whether the battery back cover is mounted on the second channel speaker according to the high and low levels of the input detection signal, and switching the play mode of the mobile terminal according to the determination result to open and close the audio power amplifier module; B2, according to the opening and closing state of the audio power amplifier module, selecting to play the first channel signal and the second channel signal by the first channel speaker in the processor, or the first channel signal and the second channel signal respectively The first channel speaker in the processor and the second channel speaker in the battery back cover are played. The method for implementing the audio to transform the stereo according to claim 6, wherein the step B1 specifically includes: B11. According to whether the back cover of the battery is mounted, the detection signal corresponding to the high and low level is outputted by the second channel speaker; B12. When the input detection signal is low, it is determined that the mobile terminal does not mount the second channel speaker, and the playback mode of the mobile terminal is switched to mono, single speaker, and the audio power amplifier module is turned off; B13. When the input detection signal is high level, it is determined that the mobile terminal has mounted the second channel speaker, and the playback mode of the mobile terminal is switched to two channels, two speakers, and the audio power amplifier module is turned on. The method for implementing the audio to transform the stereo according to claim 6, wherein the step B2 specifically includes: B21, when the audio power amplifier module is turned off, simultaneously input the first channel signal and the second channel signal into the first channel speaker in the processor, and play the first channel signal; B22. When the audio power amplifier module is turned on, the first channel signal is input to the first channel speaker of the processor for playing, and the second channel signal is input to the second channel speaker of the battery back cover for playing. The method for implementing audio conversion stereo according to claim 8, wherein the step B22 further comprises: performing power amplification on the second channel signal through the audio power amplifier module. The method for implementing audio-converted stereo according to claim 6, wherein the method is implemented by the following device for implementing audio-converted stereo, the device comprising: a processor and a battery back cover; The processor processes the audio signal into a first channel signal and a second channel signal and determines whether the battery back cover mounts the second channel speaker; and selects the first channel signal and the second channel signal according to the determination result Both are played by the processor, or the first channel signal and the second channel signal are respectively played by the processor and the battery back cover. The method for implementing audio conversion stereo according to claim 10, wherein the processor comprises a sound processing module, a mode switching module, a playing module, and a first channel speaker; a sound processing module, configured to process the audio signal into a first channel signal and a second channel signal; The mode switching module is configured to determine whether the battery back cover is mounted on the second channel speaker according to the high and low levels of the input detection signal, and switch the play mode of the mobile terminal according to the determination result to open and close the audio power amplifier module; a playing module, configured to select, according to an open/close state of the audio power amplifier module, the first channel signal and the second channel signal to be played by the first channel speaker in the processor, or the first channel signal and the second channel The signals are respectively played by the first channel speaker in the processor and the second channel speaker in the battery back cover. The method of implementing audio conversion stereo according to claim 10, wherein the battery back cover comprises an audio power amplifier module, an ID recognition module, and a second channel speaker; An audio power amplifier module for performing power amplification on the second channel signal; The ID identification module is configured to output a detection signal corresponding to the high and low levels according to whether the battery back cover is mounted on the second channel speaker. A method of implementing audio conversion stereo according to claim 11, wherein The mode switching module specifically includes: The low level unit is configured to determine that the mobile terminal does not mount the second channel speaker when the input detection signal is low, switch the play mode of the mobile terminal to mono, single speaker, and turn off the audio power amplifier module. ; The high level unit is configured to determine that the mobile terminal has mounted the second channel speaker when the input detection signal is high level, switch the play mode of the mobile terminal to two channels, dual speakers, and turn on the audio power amplifier module. . A method of implementing audio conversion stereo according to claim 11, wherein The playing module specifically includes: a first playing unit, configured to simultaneously input the first channel signal and the second channel signal into the first channel speaker of the processor when the audio power amplifier module is turned off, and play the first channel signal; a second playing unit, configured to input the first channel signal into the first channel speaker of the processor for playing when the audio power amplifier module is turned on, and input the second channel signal to the second channel speaker of the battery back cover Play in. A device for implementing audio conversion stereo, comprising: a processor and a battery back cover; The processor includes a sound processing module, a mode switching module, a playing module, and a first channel speaker; a sound processing module, configured to process the audio signal into a first channel signal and a second channel signal; The mode switching module is configured to determine whether the battery back cover is mounted on the second channel speaker according to the high and low levels of the input detection signal, and switch the play mode of the mobile terminal according to the determination result to open and close the audio power amplifier module; a playing module, configured to select, according to an open/close state of the audio power amplifier module, the first channel signal and the second channel signal to be played by the first channel speaker in the processor, or the first channel signal and the second channel The signals are respectively played by the first channel speaker in the processor and the second channel speaker in the battery back cover; The battery back cover includes an audio power amplifier module, an ID recognition module, and a second channel speaker; An audio power amplifier module for performing power amplification on the second channel signal; The ID identification module is configured to output the detection signal corresponding to the high and low levels according to whether the battery back cover is mounted on the second channel speaker. An apparatus for implementing audio conversion stereo according to claim 15, wherein The mode switching module specifically includes: The low level unit is configured to determine that the mobile terminal does not mount the second channel speaker when the input detection signal is low, switch the play mode of the mobile terminal to mono, single speaker, and turn off the audio power amplifier module. ; The high level unit is configured to determine that the mobile terminal has mounted the second channel speaker when the input detection signal is high level, switch the play mode of the mobile terminal to two channels, dual speakers, and turn on the audio power amplifier module. . An apparatus for implementing audio conversion stereo according to claim 15, wherein The playing module specifically includes: a first playing unit, configured to: when the audio power amplifier module is turned off, the first channel signal and the second channel The signal is simultaneously input into the first channel speaker of the processor, and the first channel signal is played; a second playing unit, configured to input the first channel signal into the first channel speaker of the processor for playing when the audio power amplifier module is turned on, and input the second channel signal to the second channel speaker of the battery back cover Play in.

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