CN113852894B

CN113852894B - earphone

Info

Publication number: CN113852894B
Application number: CN202110920458.9A
Authority: CN
Inventors: 邹干辉
Original assignee: Anker Innovations Co Ltd
Current assignee: Anker Innovations Co Ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2023-08-29
Anticipated expiration: 2041-08-11
Also published as: CN113852894A

Abstract

An earphone, includes main control chip, stereophonic digital earphone amplifier and the speaker of single power supply, wherein: the main control chip obtains an audio signal to be processed, decodes the audio signal to be processed to obtain a first audio signal, performs mirror image processing on the first audio signal to obtain a second audio signal, and transmits the first audio signal and the second audio signal to the stereo digital earphone amplifier; the stereo digital earphone amplifier performs digital-to-analog conversion and amplification on the first audio signal and the second audio signal to obtain a third audio signal and a fourth audio signal respectively, and transmits the third audio signal and the fourth audio signal to the loudspeaker so as to drive the loudspeaker. The earphone of the application can improve the driving voltage and the output power of the loudspeaker under the condition of realizing single power supply, avoids complex matching of the circuit structure of the earphone and also avoids improving the cost.

Description

Earphone

Technical Field

The application relates to the technical field of earphones, in particular to an earphone.

Background

Currently, bluetooth headsets such as real wireless stereo headsets (TWS) are usually powered by a single power supply, and the bluetooth chip directly drives the speaker or adds a single power supply to the headset amplifier to drive the speaker, so that the voltage and power for driving the speaker are limited by the voltage of the single power supply.

In order to increase the voltage and power driving the speaker, the existing solutions generally design the earphone as a dual power supply. However, such a manner has to change the structure of the earphone single power supply, and increases the cost.

Disclosure of Invention

The present application has been made to solve the above-described problems. According to an aspect of the present application, there is provided an earphone comprising a main control chip, a stereo digital earphone amplifier powered by a single power supply, and a speaker, wherein: the main control chip obtains an audio signal to be processed, decodes the audio signal to be processed to obtain a first audio signal, performs mirror image processing on the first audio signal to obtain a second audio signal, and transmits the first audio signal and the second audio signal to the stereo digital earphone amplifier; the stereo digital earphone amplifier performs digital-to-analog conversion and amplification on the first audio signal and the second audio signal to obtain a third audio signal and a fourth audio signal respectively, and transmits the third audio signal and the fourth audio signal to the loudspeaker so as to drive the loudspeaker.

According to another aspect of the present application, there is provided an earphone comprising a main control chip, a stereo digital earphone amplifier powered by a single power supply, and a speaker, wherein: the main control chip acquires an audio signal to be processed, decodes the audio signal to be processed to obtain a first audio signal, and transmits the first audio signal to the stereo digital earphone amplifier; the stereo digital earphone amplifier is used for carrying out mirror image processing on the first audio signal to obtain a second audio signal, carrying out digital-to-analog conversion and amplification on the first audio signal and the second audio signal to obtain a third audio signal and a fourth audio signal respectively, and transmitting the third audio signal and the fourth audio signal to the loudspeaker so as to drive the loudspeaker.

According to a further aspect of the present application there is provided an earphone comprising a main control chip, a stereo analog earphone amplifier powered by a single power supply and a speaker, wherein: the main control chip obtains an audio signal to be processed, decodes the audio signal to be processed to obtain a first audio signal, performs mirror image processing on the first audio signal to obtain a second audio signal, and respectively performs digital-to-analog conversion on the first audio signal and the second audio signal and then transmits the first audio signal and the second audio signal to the stereo analog earphone amplifier; the stereo analog earphone amplifier amplifies the respective digital-to-analog converted signals of the first audio signal and the second audio signal to obtain a third audio signal and a fourth audio signal respectively, and the third audio signal and the fourth audio signal are transmitted to the loudspeaker to drive the loudspeaker.

In one embodiment of the present application, the main control chip includes a stereo audio codec, which decodes the audio signal to be processed and performs the mirroring on the first audio signal.

In one embodiment of the present application, the main control chip includes a mono audio codec that performs the decoding of the audio signal to be processed.

In one embodiment of the application, the headphones comprise a left ear headphone and a right ear headphone, each comprising the master control chip, the stereo digital headphone amplifier, and the speaker.

In one embodiment of the present application, in the left ear earphone, the first audio signal is a left channel audio signal, and the second audio signal is an inverse signal of the left channel audio signal.

In one embodiment of the present application, in the right ear earphone, the first audio signal is a right channel audio signal, and the second audio signal is an inverse signal of the right channel audio signal.

In one embodiment of the present application, the earphone is a wireless earphone, the earphone further includes an antenna, the antenna processes the received signal to obtain the audio signal to be processed, and the main control chip obtains the audio signal to be processed from the antenna.

In one embodiment of the present application, the earphone is a bluetooth earphone, and the main control chip includes a bluetooth chip.

According to the earphone provided by the embodiment of the application, the driving voltage and the output power of the loudspeaker can be improved in multiple under the condition of single power supply, so that the complex matching of the earphone circuit structure is avoided, and the cost is also avoided.

Drawings

The above and other objects, features and advantages of the present application will become more apparent from the following more particular description of embodiments of the present application, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts or steps.

Fig. 1A and 1B show schematic structural diagrams of a conventional bluetooth headset.

Fig. 2 shows a schematic diagram of the voltage and output power calculations of a conventional bluetooth headset driving speaker.

Fig. 3 is a schematic block diagram of a headset according to an embodiment of the application.

Fig. 4A and 4B show schematic structural diagrams of left and right ear headphones, respectively, in the embodiment shown in fig. 3.

Fig. 5 shows a schematic diagram of the voltage and output power calculations for driving a speaker in the embodiment shown in fig. 4A.

Fig. 6 shows a schematic block diagram of a headset according to another embodiment of the application.

Fig. 7A and 7B show schematic structural diagrams of the left-ear earphone and the right-ear earphone, respectively, in the embodiment shown in fig. 6.

Fig. 8 shows a schematic block diagram of a headset according to yet another embodiment of the application.

Fig. 9A and 9B show schematic structural diagrams of the left-ear earphone and the right-ear earphone, respectively, in the embodiment shown in fig. 8.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and it should be understood that the present application is not limited by the example embodiments described herein. Based on the embodiments of the application described in the present application, all other embodiments that a person skilled in the art would have without inventive effort shall fall within the scope of the application.

First, a schematic structural diagram of an existing bluetooth headset is described with reference to fig. 1A and 1B. Fig. 1A is a schematic structural diagram of a left ear earphone, and fig. 1B is a schematic structural diagram of a right ear earphone.

As shown in fig. 1A, a left ear headset 100L of the existing bluetooth headset includes a bluetooth chip 110L (i.e., a main control chip 110L), a mono digital headset amplifier 120L, a speaker 130L, and an antenna 140L. The bluetooth chip 110L includes a mono audio codec, which decodes the left channel audio signal received from the antenna 140L, and transmits the decoded audio signal L to the mono digital headphone amplifier 120L via the digital audio interface; after digital-to-analog conversion and amplification of the decoded audio signal L, the mono digital headphone amplifier 120L outputs the signal L 'to the speakers 130L, L' as a positive terminal signal, and the negative terminal is grounded GND to drive the speakers 130L to make a sound.

Similarly, as shown in fig. 1B, the right ear headset 100R of the existing bluetooth headset includes a bluetooth chip 110R (i.e., a main control chip 110R), a mono digital headset amplifier 120R, a speaker 130R, and an antenna 140R. The bluetooth chip 110R includes a mono audio codec, which decodes the right audio signal received from the antenna 140R, and transmits the decoded audio signal R to the mono digital headphone amplifier 120R via the digital audio interface; after the mono digital headphone amplifier 120R performs digital-to-analog conversion and amplification on the decoded audio signal R, the signal R 'is output to the speakers 130R, R' as a positive signal, and the negative terminal is grounded GND to drive the speakers 130R to make a sound.

The calculation of the voltage and power to drive the speaker in the existing bluetooth headset will be described below with reference to fig. 2 taking the left-ear headset as an example (the same is true for the right-ear headset). As shown in fig. 2, since the digital headphone amplifier 120L is mono, i.e., it includes one amplifier l_amp, it is single ended output, i.e., it drives a speaker. Assuming that the amplification factor of the amplifier L_AMP is 1 and the load impedance of the speaker is R _out The output voltage (driving voltage of speaker) U of the amplifier l_amp _out Input voltage U equal to amplifier L_AMP _L (because of the left ear earphone, the input voltage of L_AMP is denoted as U _L I.e. the input voltage U of the digital headphone amplifier 120L _in U, i.e. U _in Equal to U _L ) The method comprises the steps of carrying out a first treatment on the surface of the Output power P _out Equal to U _out *U _out */R _out I.e. equal to U _in *U _in /R _out 。

Thus, the voltage and power to drive the speaker may be limited by the voltage level of the single power supply itself. The existing scheme is to design the earphone to be powered by a positive power supply and a negative power supply. However, such a manner has to change the structure of the earphone single power supply, and increases the cost.

Based on this, the present application proposes an earphone that is capable of increasing the driving voltage and output power of a speaker with power supplied only by a single power supply. Described below in connection with fig. 3 through 9B.

Fig. 3 is a schematic block diagram of a headset 300 according to one embodiment of the application. As shown in fig. 3, the headset 300 includes a main control chip 310, a single power supply stereo digital headset amplifier 320, and a speaker 330, wherein: the main control chip 310 obtains an audio signal to be processed, decodes the audio signal to be processed to obtain a first audio signal, performs mirror image processing on the first audio signal to obtain a second audio signal, and transmits the first audio signal and the second audio signal to the stereo digital earphone amplifier 320; the stereo digital headphone amplifier 320 performs digital-to-analog conversion and amplification on the first audio signal and the second audio signal to obtain a third audio signal and a fourth audio signal, respectively, and transmits the third audio signal and the fourth audio signal to the speaker 330 to drive the speaker 330 to make a sound.

In the embodiment of the present application, the main control chip 310 of the earphone 300 performs mirror image processing on a first audio signal obtained after decoding an audio signal to be processed to obtain a second audio signal, that is, the second audio signal is an inverse signal of the first audio signal; these two signals of equal amplitude, opposite phase to each other, are then sent to a stereo digital headphone amplifier 320; the stereo digital headphone amplifier 320 includes two-channel amplifiers such that the first audio signal and the second audio signal are each input to one amplifier after being digital-to-analog converted, respectively, and the two amplifiers output the third audio signal and the fourth audio signal, respectively; because the first audio signal and the second audio signal are two signals with the same amplitude and the opposite phase, the third audio signal and the fourth audio signal obtained after the digital-to-analog conversion and the amplification of the two signals are also two signals with the same amplitude and the opposite phase; the third audio signal and the fourth audio signal are transmitted to the speaker 330, and the speaker 330 is driven to emit sound, i.e., the speaker 330 is driven by the differential signal; the differential signal driven speaker may achieve a multiple increase in the driving voltage of speaker 330 relative to a single-ended signal driven speaker, as well as a multiple increase in the output power. In addition, since the stereo digital headphone amplifier 320 is still powered by a single power supply, it is possible to increase the driving voltage and output power of the speaker 330 in the case of single power supply, to avoid complicated circuit structure matching of the headphone 300, and to avoid increasing the cost.

In an embodiment of the present application, the main control chip 310 may include a stereo audio codec (not shown in fig. 3, and shown in fig. 4A and 4B later), which may decode the aforementioned audio signal to be processed and mirror the aforementioned first audio signal to obtain the aforementioned second audio signal. Furthermore, in an embodiment of the present application, the earphone 300 may be a wireless earphone (such as a bluetooth earphone), the earphone 300 may further include an antenna (not shown in fig. 3, and shown in fig. 4A and 4B later), the antenna may process the received signal to obtain the aforementioned audio signal to be processed, and the main control chip 310 may obtain the audio signal to be processed from the antenna. In addition, in the embodiment of the present application, the earphone 300 may be a bluetooth earphone, and the main control chip 310 may be a bluetooth chip. In addition, in an embodiment of the present application, the earphone 300 may include a left ear earphone and a right ear earphone, each of which includes the aforementioned main control chip 310, the stereo digital earphone amplifier 320, and the speaker 330. Described below in connection with fig. 4A and 4B.

Fig. 4A shows a schematic structural diagram of a left-ear earphone 300L of the earphone 300, and fig. 4B shows a schematic structural diagram of a right-ear earphone 300R of the earphone 300.

As shown in fig. 4A, the left ear phone 300L includes a main control chip 310L, a single power supply stereo digital headphone amplifier 320L, a speaker 330L, and an antenna 340L. Wherein. The main control chip 310L may include a stereo audio codec, which obtains a left channel audio signal to be processed from the antenna 340L, decodes the audio signal to be processed to obtain a first audio signal, and uses the first audio signal as a left channel output signal L (l+); in addition, the stereo audio codec performs a mirror image process on the first audio signal to obtain a second audio signal, and uses the second audio signal as its right channel output signal R (L-). The master control chip 310L may then transfer the signals L (L+) and R (L-) to the stereo digital headphone amplifier 320L via the digital audio interface according to the I2S protocol and/or the I2C protocol. The stereo digital headphone amplifier 320L performs digital-to-analog conversion and amplification on both signals L (l+) and R (L-) to obtain a third audio signal L (l+) 'and a fourth audio signal R (L-)' respectively, and transmits the signals L (l+) 'and R (L-)' to the speaker 330L, l+) 'as a positive side signal, and R (L-)' as a negative side signal to drive the speaker 330L to emit sound.

Similarly, as shown in fig. 4B, the right ear headset 300R includes a main control chip 310R, a single power supply stereo digital headset amplifier 320R, a speaker 330R, and an antenna 340R. Wherein. The main control chip 310R may include a stereo audio codec, which obtains a to-be-processed audio signal of a right channel from the antenna 340R, decodes the to-be-processed audio signal to obtain a first audio signal, and uses the first audio signal as a right channel output signal R (r+); in addition, the stereo audio codec performs a mirror image process on the first audio signal to obtain a second audio signal, and uses the second audio signal as its left channel output signal L (R-). The master chip 310 may then transmit the signals R (R+) and L (R-) to the stereo digital headphone amplifier 320R via the digital audio interface according to the I2S protocol and/or the I2C protocol. The stereo digital headphone amplifier 320R performs digital-to-analog conversion and amplification on both signals R (r+) and L (R-) to obtain a third audio signal R (r+) 'and a fourth audio signal L (R-)' respectively, and transmits the signals R (r+) 'and L (R-)' to the speaker 330R, R (r+) 'as a positive side signal, and L (R-)' as a negative side signal to drive the speaker 330R to emit sound.

The principle of implementing a multiple increase in driving voltage and output power of the earphone 300 with respect to the conventional earphone described above will be described below with reference to fig. 5 by taking the left ear earphone 300L as an example. As shown in fig. 5, the stereo digital headphone amplifier 320L includes two amplifiers, i.e., l_amp and r_amp, respectively, which respectively receive the first audio signal L (l+) and the second audio signal R (L-), which are output from the main control chip 310L, and amplified to output a third audio signal L (l+) 'and a fourth audio signal R (L-)', respectively.

Assume that the amplification factors of the amplifiers L_AMP and R_AMP are both 1, and the load impedance of the speaker is R _out The output voltage of the amplifier l_amp is equal to the input voltage U of the amplifier l_amp _L+ (since it is a left ear earphone and the input of L_AMP is L (L+), the input voltage of the amplifier L_AMP is denoted as U _L+ ) The method comprises the steps of carrying out a first treatment on the surface of the Similarly, the output voltage of the amplifier R_AMP is equal to the input voltage U of the amplifier R_AMP _L- (since it is a left ear earphone and the input of R_AMP is R (L-), the input voltage of the amplifier R_AMP is denoted as U _L- ). Input voltage U of whole stereo digital earphone amplifier 320L _in Equal to U _L+ Is also equal to-U _L- The method comprises the steps of carrying out a first treatment on the surface of the Output voltage U of whole stereo digital earphone amplifier 320L _out (i.e., the driving voltage of speaker 330L) is equal to U _L+ -(-U _L- ) Equal to 2U _in The method comprises the steps of carrying out a first treatment on the surface of the Output power P _out Equal to U _out *U _out */R _out I.e. equal to 4U _in *U _in /R _out 。

It can be seen that, with respect to the example of the prior art earphone described in connection with fig. 1 and 2, the earphone of the present application is powered by a single power supply instead of a positive and negative power supply, and by converting the single-ended output to a differential output, the output voltage is amplified 2 times more than the single-ended output, the output power is amplified 4 times more than the single-ended output (this is the case assuming an amplifier amplification factor of 1, assuming an amplifier amplification factor of N, the output voltage is amplified 2N times more than the single-ended output, the output power is amplified 4N more than the single-ended output) ² Multiple).

Based on the above description, the earphone 300 according to the embodiment of the present application obtains the differential signal by mirroring the audio signal through the main control chip on the left ear or the right ear, and outputs the differential signal to drive the speaker through the stereo digital earphone amplifier powered by the single power supply, so that the driving voltage and the output power of the speaker on the left ear or the right ear can be improved under the condition of single power supply, the complex matching of the circuit structure of the earphone 300 is avoided, and the cost is also avoided.

Headphones according to other embodiments of the present application are described below in conjunction with fig. 6-9B, which are similar in construction to those of the previous embodiments, but slightly different, but which can achieve an increase in speaker drive voltage and output power with a single power supply.

Fig. 6 shows a schematic block diagram of an earphone 600 according to another embodiment of the present application. As shown in fig. 6, the headset 600 includes a main control chip 610, a single power supply stereo digital headset amplifier 620, and a speaker 630, wherein: the main control chip 610 obtains an audio signal to be processed, decodes the audio signal to be processed to obtain a first audio signal, and transmits the first audio signal to the stereo digital headphone amplifier 620; the stereo digital headphone amplifier 620 performs image processing on the first audio signal to obtain a second audio signal, performs digital-to-analog conversion and amplification on both the first audio signal and the second audio signal to obtain a third audio signal and a fourth audio signal, and transmits the third audio signal and the fourth audio signal to the speaker 630 to drive the speaker 630.

The headset 600 according to an embodiment of the present application is substantially similar to the headset 300 described above, except that the headset 600 is mirrored by the stereo digital headset amplifier 620 to obtain a differential signal.

Specifically, in the embodiment of the present application, the main control chip 610 of the headset 600 decodes the audio signal to be processed to obtain a first audio signal; next, the main control chip 610 transmits the first audio signal to the stereo digital headphone amplifier 620; the stereo digital headphone amplifier 620 performs an image processing on the first audio signal to obtain a second audio signal, that is, the second audio signal is an inverse signal of the first audio signal; then, the two signals with the same amplitude and opposite phases are digital-to-analog converted by the stereo digital headphone amplifier 620; the stereo digital headphone amplifier 620 includes two channel amplifiers such that the first audio signal and the second audio signal are respectively input to one amplifier at the digital-to-analog converted signals, and the two amplifiers output the third audio signal and the fourth audio signal, respectively; because the first audio signal and the second audio signal are two signals with the same amplitude and the opposite phase, the third audio signal and the fourth audio signal obtained after the digital-to-analog conversion and the amplification of the two signals are also two signals with the same amplitude and the opposite phase; the third audio signal and the fourth audio signal are transmitted to the speaker 630, and the speaker 630 is driven to emit sound, that is, the speaker 630 is driven to emit sound by the differential signal; the differential signal driving speaker 630 may achieve a doubling of the driving voltage of the speaker 630 relative to a single-ended signal driving speaker, as well as a several-fold increase in output power. In addition, since the stereo digital headphone amplifier 620 is still powered by a single power supply, it is possible to increase the driving voltage and output power of the speaker 630 in the case of single power supply, and to avoid complexity in circuit configuration matching of the headphone 600 and to avoid increase in cost.

In an embodiment of the present application, the main control chip 610 may include a stereo audio codec or a mono audio codec (not shown in fig. 6, and later shown in fig. 7A and 7B) that may decode the aforementioned audio signal to be processed. Furthermore, in an embodiment of the present application, the headset 600 may be a wireless headset (such as a bluetooth headset), the headset 600 may further include an antenna (not shown in fig. 6, and shown later in fig. 7A and 7B), the antenna may process the received signal to obtain the aforementioned audio signal to be processed, and the main control chip 610 may obtain the audio signal to be processed from the antenna. In addition, in an embodiment of the present application, the headset 600 may be a bluetooth headset, and the main control chip 610 may be a bluetooth chip. In addition, in an embodiment of the present application, the earphone 600 may include a left ear earphone and a right ear earphone, each of which includes the aforementioned main control chip 610, the stereo digital earphone amplifier 620, and the speaker 630. Described below in connection with fig. 7A and 7B.

Fig. 7A shows a schematic structural diagram of a left-ear earphone 600L of the earphone 600, and fig. 7B shows a schematic structural diagram of a left-ear earphone 600R of the earphone 600.

As shown in fig. 7A, the left ear phone 600L includes a main control chip 610L, a single power supply stereo digital headphone amplifier 620L, a speaker 630L, and an antenna 640L. Wherein. The main control chip 610L may include a stereo or mono audio codec, which obtains a left channel audio signal to be processed from the antenna 640L, decodes the audio signal to be processed to obtain a first audio signal L1, and outputs the first audio signal L1 to the stereo digital headphone amplifier 620L. The stereo digital headphone amplifier 620L performs image processing on the first audio signal L1 to obtain a second audio signal, performs digital-to-analog conversion and amplification on both audio signals to obtain a third audio signal L (l+) 'and a fourth audio signal R (L-)' respectively, and transmits the signals L (l+) 'and R (L-)' to the speakers 630L, l+) 'as a positive side signal and R (L-)' as a negative side signal to drive the speakers 630L to emit sound.

Similarly, as shown in fig. 7B, the right ear phone 600R includes a main control chip 610R, a single power supply stereo digital headphone amplifier 620R, a speaker 630R, and an antenna 640R. Wherein. The main control chip 610R may include a stereo or mono audio codec, which obtains a right channel audio signal to be processed from the antenna 640R, decodes the audio signal to be processed to obtain a first audio signal R1, and outputs the first audio signal R1 to the stereo digital headphone amplifier 620R. The stereo digital headphone amplifier 620R performs image processing on the first audio signal R1 to obtain a second audio signal, performs digital-to-analog conversion and amplification on both audio signals to obtain a third audio signal R (r+) 'and a fourth audio signal L (R-)' respectively, and transmits the signals R (r+) 'and L (R-)' to the speaker 630R, r+) 'as a positive side signal, and L (R-)' as a negative side signal to drive the speaker 630R to emit sound.

Similar to the above description with reference to fig. 5, the earphone 600 may also achieve a multiple increase in the driving voltage and output power of the speaker 630, and for brevity, will not be described here again. Based on the above description, the earphone 600 according to the embodiment of the present application performs mirroring processing on the audio signal by using the stereo digital earphone amplifier powered by the single power supply to obtain a differential signal, and then performs digital-to-analog conversion and amplification, and finally outputs the amplified differential signal to drive the speaker to make a sound, so that the driving voltage and output power of the speaker 630 can be improved under the condition of single power supply, and the circuit structure matching complexity and the cost increase of the earphone 600 are avoided.

Fig. 8 shows a schematic block diagram of a headset 800 in accordance with yet another embodiment of the application. As shown in fig. 8, the headset 800 includes a main control chip 810, a single power supply stereo analog headset amplifier 820, and a speaker 830, wherein: the main control chip 810 obtains an audio signal to be processed, decodes the audio signal to be processed to obtain a first audio signal, performs mirror image processing on the first audio signal to obtain a second audio signal, and respectively performs digital-to-analog conversion on the first audio signal and the second audio signal and then transmits the first audio signal and the second audio signal to the stereo analog earphone amplifier 820; the stereo analog earphone amplifier 820 amplifies the respective digital-to-analog converted signals of the first audio signal and the second audio signal to obtain a third audio signal and a fourth audio signal, respectively, and transmits the third audio signal and the fourth audio signal to the speaker 830 to drive the speaker 830.

The headset 800 according to an embodiment of the present application is substantially similar to the headset 300 described above, except that the headset 800 employs the main control chip 810 to perform digital-to-analog conversion on signals, and the stereo analog headset amplifier 820 performs the function of amplifying differential signals.

Specifically, in the embodiment of the present application, the main control chip 810 of the headset 800 performs image processing on a first audio signal obtained after decoding an audio signal to be processed to obtain a second audio signal, that is, the second audio signal is an inverse signal of the first audio signal; then, the two signals with the same amplitude and opposite phases are respectively transmitted to the stereo analog earphone amplifier 820 after being subjected to digital-to-analog conversion by the digital-to-analog converter of the main control chip 810; the stereo analog headphone amplifier 820 includes two channel amplifiers such that the respective digital-to-analog converted signals of the first audio signal and the second audio signal are respectively input to one amplifier, and the two amplifiers output the third audio signal and the fourth audio signal, respectively; because the first audio signal and the second audio signal are two signals with the same amplitude and the opposite phase, the third audio signal and the fourth audio signal obtained by digital-to-analog conversion and amplification of the two signals are also two signals with the same amplitude and the opposite phase; the third audio signal and the fourth audio signal are transmitted to the speaker 830, and the speaker 830 is driven to emit sound, that is, the speaker is driven to emit sound by the differential signal; compared with a single-ended signal driving loudspeaker, the differential signal driving loudspeaker can realize double improvement of the driving voltage of the loudspeaker and double improvement of the output power. In addition, since the stereo analog earphone amplifier 820 is still powered by a single power supply, the driving voltage and output power of the speaker 830 can be improved under the condition of single power supply, so that the complexity of circuit structure matching of the earphone 800 is avoided, and the cost is also avoided.

In an embodiment of the present application, the main control chip 810 may include a stereo audio codec (not shown in fig. 8, and shown in fig. 9A and 9B later) that decodes the aforementioned audio signal to be processed, and mirrors the aforementioned first audio signal to obtain the aforementioned second audio signal, and digital-to-analog converts the two audio signals. Furthermore, in an embodiment of the present application, the headset 800 may be a wireless headset (such as a bluetooth headset), the headset 800 may further include an antenna (not shown in fig. 8, and shown later in fig. 9A and 9B), the antenna may process the received signal to obtain the aforementioned audio signal to be processed, and the main control chip 810 may obtain the audio signal to be processed from the antenna. In addition, in an embodiment of the present application, the headset 800 may be a bluetooth headset, and the main control chip 810 may be a bluetooth chip. Furthermore, in an embodiment of the present application, the earphone 800 may include a left ear earphone and a right ear earphone, each of which includes the aforementioned main control chip 810, stereo digital earphone amplifier 820, and speaker 830. Described below in connection with fig. 9A and 9B.

Fig. 9A shows a schematic structural diagram of a left-ear earphone 800L of the earphone 800, and fig. 4B shows a schematic structural diagram of a right-ear earphone 800R of the earphone 800.

As shown in fig. 9A, the left ear phone 800L includes a main control chip 810L, a single power supply stereo analog headphone amplifier 820L, a speaker 830L, and an antenna 840L. Wherein. The main control chip 810L may include a stereo audio codec that obtains a left channel audio signal to be processed from the antenna 840L, decodes the audio signal to be processed to obtain a first audio signal, and uses the first audio signal as a left channel output signal L (l+); in addition, the stereo audio codec performs a mirror image process on the first audio signal to obtain a second audio signal, and uses the second audio signal as its right channel output signal R (L-). Then, the main control chip 810L performs digital-to-analog conversion on the signals L (l+) and R (L-) to obtain L (l+) "and R (L-)", and then transmits the digital-to-analog converted signals to the stereo analog headphone amplifier 820L via the digital audio interface according to the I2S protocol and/or the I2C protocol. The stereo analog headphone amplifier 820L amplifies both of L (l+) "and R (L-)" to obtain a third audio signal L (l+) 'and a fourth audio signal R (L-)' respectively, and transmits the signals L (l+) 'and R (L-)' to the speaker 830L, L (l+) 'as a positive side signal, and R (L-)' as a negative side signal to drive the speaker 830L to emit sound.

Similarly, as shown in fig. 9B, the right ear headset 800R includes a main control chip 810R, a single power supply stereo analog headset amplifier 820R, a speaker 830R, and an antenna 840R. Wherein. The main control chip 810R may include a stereo audio codec, which obtains a to-be-processed audio signal of a right channel from the antenna 840R, decodes the to-be-processed audio signal to obtain a first audio signal, and uses the first audio signal as a right channel output signal R (r+); in addition, the stereo audio codec performs a mirror image process on the first audio signal to obtain a second audio signal, and uses the second audio signal as its left channel output signal L (R-). Next, the main control chip 810R performs digital-to-analog conversion on the signals R (r+) and L (R-) to obtain R (r+) "and L (R-)", and then transmits the digital-to-analog converted signals R (r+) "and L (R-)" to the stereo analog headphone amplifier 820R via the digital audio interface according to the I2S protocol and/or the I2C protocol. The stereo analog headphone amplifier 820R amplifies both of R (r+) "and L (R-)" to obtain a third audio signal R (r+) ' and a fourth audio signal L (R-) ' respectively, and transmits the signals R (r+) ' and L (R-) ' to the speaker 830R as a positive side signal and L (R-) ' as a negative side signal to drive the speaker 830R to emit sound.

Similar to that described above in connection with fig. 5, the headset 800 may also achieve a multiple increase in speaker drive voltage and output power, and for brevity, will not be described in detail herein. Based on the above description, the earphone 800 according to the embodiment of the present application performs digital-to-analog conversion on the differential signal obtained by mirroring the audio signal through the main control chip, amplifies the digital-to-analog converted differential signal through the stereo analog earphone amplifier powered by the single power supply, and finally outputs the amplified differential signal to drive the speaker, so that the driving voltage and the output power of the speaker can be improved under the condition of single power supply, the complexity of circuit structure matching of the earphone 800 is avoided, and the cost is also avoided.

The earphone according to the embodiment of the present application is exemplarily shown above, and in general, the earphone according to the embodiment of the present application can improve the driving voltage and output power of the speaker under the condition of realizing single power supply, so as to avoid complex matching of the earphone circuit structure and also avoid increasing the cost. Although the foregoing embodiment has been mainly described by taking headphones with separate left and right ears as an example, it is merely exemplary, and the scheme of the present application is also applicable to headphones, line-controlled headphones, neck-wear headphones, and the like.

Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above illustrative embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be made therein by one of ordinary skill in the art without departing from the scope and spirit of the application. All such changes and modifications are intended to be included within the scope of the present application as set forth in the appended claims.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, e.g., the division of the elements is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another device, or some features may be omitted or not performed.

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

Similarly, it should be appreciated that in order to streamline the application and aid in understanding one or more of the various inventive aspects, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the application. However, the method of the present application should not be construed as reflecting the following intent: i.e., the claimed application requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.

It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be combined in any combination, except combinations where the features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

Various component embodiments of the application may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that some or all of the functions of some of the modules according to embodiments of the present application may be implemented in practice using a microprocessor or Digital Signal Processor (DSP). The present application can also be implemented as an apparatus program (e.g., a computer program and a computer program product) for performing a portion or all of the methods described herein. Such a program embodying the present application may be stored on a computer readable medium, or may have 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.

It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may 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 may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.

The foregoing description is merely illustrative of specific embodiments of the present application and the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present application. The protection scope of the application is subject to the protection scope of the claims.

Claims

1. The utility model provides a headset, its characterized in that, the headset is wireless earphone, the headset includes left ear earphone and right ear earphone, left ear earphone with right ear earphone all includes main control chip, single power supply's stereophonic digital earphone amplifier and speaker respectively, wherein:

the main control chip obtains an audio signal to be processed, decodes the audio signal to be processed to obtain a first audio signal, performs mirror image processing on the first audio signal to obtain a second audio signal, and transmits the first audio signal and the second audio signal to the stereo digital earphone amplifier;

the stereo digital earphone amplifier performs digital-to-analog conversion and amplification on the first audio signal and the second audio signal to obtain a third audio signal and a fourth audio signal respectively, and transmits the third audio signal and the fourth audio signal to the loudspeaker so as to drive the loudspeaker.

2. The utility model provides a headset, its characterized in that, the headset is wireless earphone, the headset includes left ear earphone and right ear earphone, left ear earphone with right ear earphone all includes main control chip, single power supply's stereophonic digital earphone amplifier and speaker respectively, wherein:

the main control chip acquires an audio signal to be processed, decodes the audio signal to be processed to obtain a first audio signal, and transmits the first audio signal to the stereo digital earphone amplifier;

the stereo digital earphone amplifier is used for carrying out mirror image processing on the first audio signal to obtain a second audio signal, carrying out digital-to-analog conversion and amplification on the first audio signal and the second audio signal to obtain a third audio signal and a fourth audio signal respectively, and transmitting the third audio signal and the fourth audio signal to the loudspeaker so as to drive the loudspeaker.

3. The utility model provides a headset, its characterized in that, the headset is wireless earphone, the headset includes left ear earphone and right ear earphone, left ear earphone with right ear earphone all includes master control chip, single power supply's stereophonic analog earphone amplifier and speaker respectively, wherein:

the main control chip obtains an audio signal to be processed, decodes the audio signal to be processed to obtain a first audio signal, performs mirror image processing on the first audio signal to obtain a second audio signal, and respectively performs digital-to-analog conversion on the first audio signal and the second audio signal and then transmits the first audio signal and the second audio signal to the stereo analog earphone amplifier;

the stereo analog earphone amplifier amplifies the respective digital-to-analog converted signals of the first audio signal and the second audio signal to obtain a third audio signal and a fourth audio signal respectively, and the third audio signal and the fourth audio signal are transmitted to the loudspeaker to drive the loudspeaker.

4. A headset as claimed in claim 1 or 3, wherein the master control chip comprises a stereo audio codec, the stereo audio codec performing the decoding of the audio signal to be processed and the mirroring of the first audio signal.

5. The headset of claim 2, wherein the master chip includes a mono audio codec that performs the decoding of the audio signal to be processed.

6. A headset according to any of claims 1-3, characterized in that in the left ear headset the first audio signal is a left channel audio signal and the second audio signal is an inverse signal of the left channel audio signal.

7. A headset according to any of claims 1-3, characterized in that in the right ear headset the first audio signal is a right channel audio signal and the second audio signal is an inverse signal of the right channel audio signal.

8. A headset according to any of claims 1-3, further comprising an antenna, wherein the antenna processes the received signal to obtain the audio signal to be processed, and wherein the master control chip obtains the audio signal to be processed from the antenna.

9. A headset according to any of claims 1-3, wherein the headset is a bluetooth headset and the master control chip comprises a bluetooth chip.