TWI753672B - Apparatus and method for enhancing call quality of wireless earbuds - Google Patents

Abstract

The invention relates to apparatuses and methods for enhancing call quality in wireless earbuds. The apparatus includes a first and a second wireless earbuds. The first wireless earbud includes a first speaker and a first downlink speech process path, and the second wireless earbud includes a second speaker and a second downlink speech process path. The first and the second downlink speech process paths receive the same mono speech data from a mobile phone, and process the mono data to generate first and second analog signals, respectively, so that the first and the second speakers play the first and second analog signals, respectively. An inverter is disposed on the first downlink speech process path to generate the inverted data or signal from received data or signal, but no inverter is disposed on the second downlink speech process path. Through the inverter setting as described above, the first and the second speakers are capable of continuously playing different first and second analog signals, respectively, so as to prevent a user from feeling uncomfortable pop sounds due to execution of packet loss concealment (PLC) algorithms.

Description

Apparatus and method for improving call quality applied in wireless earphones

The present invention relates to wireless earphones, in particular to a device and method for improving call quality applied in wireless earphones.

Wireless earbuds use Bluetooth technology to receive voice signals carried on radio waves from a source device, such as a mobile phone. Due to environmental interference factors, the packets transmitted from the source device to the wireless headset may be lost. Therefore, the wireless headset can implement packet loss concealment (PLC) technology to cover up the impact of voice packet loss during communication. . However, the way in which PLC technology is implemented can affect the user's sense of hearing. The current implementation of PLC technology results in poor hearing. Therefore, the present invention proposes an apparatus and method for improving call quality applied in a wireless headset to solve the above-mentioned problems.

In view of this, how to alleviate or eliminate the above-mentioned deficiencies in related fields is a problem to be solved.

This specification relates to an embodiment of an apparatus for improving call quality applied in a wireless earphone, including first and second wireless earphones. The first wireless headset includes a first speaker and a first downlink voice processing path, and the second wireless headset includes a second speaker and a second downlink voice processing path. The first and second downstream voice processing paths receive monophonic voice data from the handset and process the monophonic voice data to generate first and second analog signals, respectively, so that the first and second speakers play the first and second, respectively analog signal. An inverter is set on the first downlink voice processing path to generate data that is inverse to the received voice data or signal. data or signal, but the above-mentioned inverter is not set on the second downstream voice processing path.

The present specification further relates to an embodiment of an apparatus for improving call quality applied in a wireless headset, which includes a packet loss compensation processor and an inverter. The packet loss compensation processor executes algorithms to reduce the impact of lost packets. The inverter is arranged on the downlink voice processing path formed between the packet loss compensation processor and the digital-to-analog converter, and is used to invert the voice data and output the voice data after the inversion, so that the speaker plays the corresponding voice after the inversion. Voice profile sound.

This specification also relates to an embodiment of a method for improving call quality applied in a wireless headset, including: a first wireless headset receives a monophonic voice stream from a mobile phone, and processes a first downlink voice processing path in the first wireless headset Invert the first voice data or signal corresponding to the mono voice stream on the second wireless headset; and the second wireless headset receives the mono voice stream from the mobile phone, but does not allow the second downstream voice processing in the second wireless headset The second voice data or signal corresponding to the monophonic voice stream on the path is inverted, so that the first speaker in the first wireless earphone and the second speaker in the second wireless earphone continuously emit different voice signals.

One of the advantages of the above embodiment is that the first and second loudspeakers can continuously play different first and second analog signals through the above-mentioned inverter arrangement, so as to avoid the user from being affected by the execution of the packet loss compensation algorithm. An uncomfortable popping sound is felt.

Other advantages of the present invention will be explained in more detail in conjunction with the following description and drawings.

10: User

110: Left wireless headset

115: Microphone

120: Right wireless headset

130: mobile phone

140,150: Downstream packets

160:Uplink packet

210: PLC processor

220: Speech Decoder

230:RX Voice Data Processor

250,270: Speakers

310, 330, 410: Signal waveform

t30: time of lost packets

430: Difference between two signals

510, 610: Receiver

520,620: Speech Decoder

530, 630: PLC processor

540,640: RX Voice Data Processor

550,650: Digital to Analog Converter

560, 660: Amplifier

535, 545, 555, 635, 645, 655: Inverter

710, 730: Waveform

810,830: Signal waveform

850: Difference between two signals

S1410~S1440: Method steps

FIG. 1 is a schematic diagram of wireless communication according to an embodiment of the present invention.

2 is a block diagram of a wireless headset in accordance with some embodiments.

FIG. 3 shows a schematic diagram of loss and compensation of speech signals according to some embodiments.

4 is a schematic diagram illustrating the difference between a perfect speech signal and a compensated speech signal according to some embodiments.

5 to 11 are block diagrams of wireless earphones according to embodiments of the present invention.

FIG. 12 shows a schematic diagram of the inversion of a speech signal according to an embodiment of the present invention.

FIG. 13 is a schematic diagram showing the difference between a perfect speech signal and a compensated speech signal according to an embodiment of the present invention.

FIG. 14 is a flowchart of a method for improving call quality in a wireless headset according to an embodiment of the present invention.

The following description is a preferred implementation manner to complete the invention, and its purpose is to describe the basic spirit of the invention, but it is not intended to limit the invention. Reference must be made to the scope of the following claims for the actual inventive content.

It must be understood that the words "comprising" and "including" used in this specification are used to indicate the existence of specific technical features, values, method steps, operation processes, elements and/or components, but do not exclude the possibility of adding More technical features, values, method steps, job processes, elements, components, or any combination of the above.

The use of words such as "first", "second", "third", etc. in the claims is used to modify the elements in the claims, and is not used to indicate that there is a priority order, a prepositional relationship between them, or an element Prior to another element, or chronological order in which method steps are performed, is only used to distinguish elements with the same name.

It must be understood that when an element is described as being "connected" or "coupled" to another element, it can be directly connected, or coupled to the other element, and intervening elements may be present. In contrast, when an element is described as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe the relationship between elements can also be read in a similar fashion, such as "between" versus "directly interposed," or "adjacent" versus "directly adjoining," and the like.

Packet loss may occur during communication between, for example, a wireless headset and a mobile phone. Since the packet loss may only occur to either one of the pair of wireless earphones, the implementation of the packet loss compensation technique will generate two voice signals that differ in a small amount of time in the pair of wireless earphones respectively. These small differences can be detected by the brain, and pop sounds appear, making the user feel uncomfortable during the call. because Therefore, the present invention proposes an apparatus and method for improving call quality applied in a wireless headset to solve the above-mentioned problems.

Refer to Figure 1. The user 10 can communicate with another user (not shown in FIG. 1 ) at the far end via the wireless network through the mobile phone 130 . The mobile phone 130 has the capability to transmit data to or receive data from a base station (base station, not shown in FIG. 1 ) using a wireless communication protocol, which may be GSM/Universal Packet Wireless Service/GSM Enhanced Data Green Evolution (global system for mobile communications/general packet Radio service/enhanced data rates for GSM evolution, GSM/GPRS/EDGE), wideband code division multiple access (WCDMA), CDMA2000, universal mobile telecommunications system, UMTS), time division-synchronous code division multiple access (time Division-synchronous code division multiple access, TD-SCDMA), long term evolution technology (long term evolution, LTE), frequency division long term evolution technology (frequency division- long term evolution (FD-LTE), time division-long term evolution (TD-LTE), IMT-2020, Wi-Fi, etc. The exchanged data may be circuit-switched (CS) or packet-switched (PS) data, which are used to carry the user's voice signal.

Further, in this embodiment, the user 10 obtains the data of the mobile phone 130 through the wireless headset. The wireless earphones are a pair of devices with wireless communication capability, including a left wireless earbud 110 and a right wireless earbud 120, and there is no physical line between the left wireless earbud 110 and the right wireless earbud 120 connected to each other. . Between the mobile phone 130 and the left wireless earphone 110 and between the mobile phone 130 and the right wireless earphone 120, a wireless communication protocol can be used to transmit a packet carrying the user's voice signal, such as an advanced audio distribution specification packet of Bluetooth. profile, A2DP Packets) or low power audio (low energy, LE Audio), etc. In other embodiments, between the mobile phone 130 and the left wireless headset 110 and between the mobile phone 130 and the left wireless headset 110 Other peer-to-peer (P2P) wireless communication protocols such as Wi-Fi direct can also be used between the right wireless earphones 120, and the present invention is not limited thereby. When the mobile phone 130 and the remote communication device establish a call connection, the left wireless earphone 110 and the right wireless earphone 120 respectively receive the downlink packets 140 and 150 transmitted from the mobile phone 130 and decode the downlink packets 140 and 150 in them. to play after the audio data. In an ideal situation, the speech data received by the left wireless earphone 110 and the right wireless earphone 120 are the same mono speech data.

A microphone 115 may be provided in the left wireless earphone 110 for collecting the voice signal of the user 10 . In other embodiments, the microphone 115 may be provided in the right wireless earphone 120, and the present invention is not limited thereby. When the call is connected, the left wireless headset 110 also activates the microphone 115 to collect the voice signal of the user 10, and after encoding, it is packaged into uplink packets 160 for transmission to the mobile phone 130, so that the mobile phone 130 can then transmit the user's voice signal. 10 voice signals to the remote user.

Due to environmental interference factors, packets transmitted from the mobile phone 130 to the left wireless earphone 110 or the right wireless earphone 120 may be lost. Therefore, the left wireless earphone 110 or the right wireless earphone 120 can perform a packet loss concealment (PLC) algorithm for concealing the effects of packet loss occurring during wireless data transmission.

Referring to the block diagram of some embodiments as shown in FIG. 2 , the left wireless headset 110 includes a downstream speech processing path from the receiver (RX) to the speaker 250 . The downlink speech processing path includes a PLC processor 210 for receiving the decoded speech data from a speech decoder 220, executing a PLC algorithm to compensate for the data lost due to packet loss in the decoded data, and converting the compensated data. The data is passed to the RX voice data processor 230.

In order to clearly understand the effect brought by the PLC algorithm, for example, referring to FIG. 3 , FIG. 3 shows waveforms 310 and 330 , which respectively represent the signals before and after the compensation of the PLC processor 210 . To be more specific, the waveform 310 represents the output voice signal corresponding to the voice data received by the PLC processor 210, in which the packet loss occurs in the time interval t30, As a result, there is almost no signal in the time interval t30. The waveform 330 represents the voice signal output after the PLC processor 210 executes the packet loss compensation algorithm, and the time interval t30 includes the compensated signal.

It should be noted that although the packet loss compensation algorithm can compensate the data of the lost packets, limited by the performance of the algorithm, the compensated packets cannot be identical to the lost signal. That is to say, the compensated signal of the waveform 330 in the time interval t30 is not exactly the same as the signal of the lost packet in the time interval t30 , which will result in poor listening experience for the user 10 , as described in detail below.

For example, referring to FIG. 4 , it is assumed that the right wireless earphone 120 does not experience packet loss, but the left wireless earphone 110 has packet loss. The waveform 410 shows the speech signal output by the speaker of the right wireless earphone 120 . The waveform 330 shows the voice signal output by the speaker 250 of the left wireless earphone 110 after the PLC processor 210 executes the packet loss compensation algorithm. Waveform 430 shows the difference between waveform 410 and waveform 330 . Since the data compensated by left wireless earphone 110 during time interval t30 is generally different from the data received by right wireless earphone 110 during time interval t30, waveform 430 has a relatively significant change during a particular period, as shown by waveform 430. Accordingly, the brain of the user 10 will notice that the left and right ears hear a short-term inconsistent sound and feel a popping sound, which makes the user 10 feel uncomfortable when talking.

Referring to FIG. 5 , the embodiment of FIG. 5 is similar to the embodiment of FIG. 2 , with the difference that FIG. 5 further depicts the right wireless earphone 120 . In addition, the left wireless earphone 110 of FIG. 5 is similar to the left wireless earphone 110 of FIG. 2 . For convenience of description and identification, the receiver 240 , the voice decoder 220 , the PLC processor 210 and the The RX speech data processor 230 does the renumbering.

Referring to FIG. 5 , the left wireless earphone 110 may include a downlink voice processing path, on which a receiver 510, a voice decoder 520, a PLC processor 530, an RX voice data processor 540, and a digital-to-analog converter (digital-to-analog converter) are arranged in sequence. -analog converter, DAC) 550 and amplifier (amplifier, AMP) 560. Receiver 510, speech decoder 520, PLC processor 530, RX speech data processor 540 and digital-to-analog converter 550 may be integrated in in one or more integrated circuits (ICs). When the mobile phone 130 and the remote communication device establish a call connection, the receiver 510 is used for receiving the radio signal from the mobile phone 130, which carries the packet of the voice message of the remote user. Any of the speech decoder 520, PLC processor 530, and RX speech data processor 540 may be implemented using dedicated digital circuits, or may be loaded and executed using general purpose hardware (eg, digital signal processors, DSPs). specific code implementation.

The voice decoder 520 can be a modified smart bitrate control (mSBC) decoder used by Bluetooth A2DP, or a low complexity communication codec used by LE Audio communication codec, LC3), used to obtain a mono stream from the packet, the sampling frequency of which can be as high as 48kHz.

The PLC processor 530 can execute any known algorithm, such as waveform substitution, model-based method, etc., for reducing the actual impact of lost packets in digital communications.

The RX voice data processor 540 can execute any known algorithm, such as noise reduction (NR), dynamic range compression (DRC), etc., for improving the call quality.

The digital-to-analog converter 550 can convert the digital mono stream into an analog signal.

The amplifier 560 increases the power of the analog signal and drives the speaker 250 to emit sound, so that the user 10 can hear the voice message of the remote user through the left ear.

The right wireless earphone 120 may include a downlink voice processing path, on which the receiver 610, the voice decoder 620, the PLC processor 630, the RX voice data processor 640, the digital-to-analog converter 650 and the amplifier 660 are arranged in sequence. The functions are respectively similar to the elements 510 to 560 , and are not repeated for brevity. Receiver 610, speech decoder 620, PLC processor 630, RX speech data processor 640, and digital-to-analog converter 650 may be integrated in one or more integrated circuits. Because the right wireless headset 120 is not provided with a microphone, the components on the upstream voice processing path from the amplifier to the transmitter (TX) (refer to the backslashed square in Figure 5) is disabled.

However, the embodiment shown in FIG. 5 will generate the technical problems that arise from the operation of the PLC algorithm as described above. In order to solve the above-mentioned problems, an embodiment of the present invention proposes a call quality improvement device applied in a wireless headset. An inverter (INV) is added to the downlink voice processing path in a wireless headset for use in a wireless headset. Generate data or signals that are completely inverse to the received voice data or signals, but there is no such inverter on the downstream voice processing path in the other wireless headset, so that when a call connection is established, the user 10 The left and right ears will continue to hear completely different voice signals, and will not feel the sound of popping.

In some embodiments, an inverter is placed between the PLC processor 530 and the amplifier 560 in the downstream speech processing path of the left wireless headset 110 . In embodiments where the inverter is provided in the right wireless headset 120 rather than the left wireless headset 110 , the inverter is provided between the PLC processor 630 and the amplifier 660 in the downstream speech processing path of the right wireless headset 120 .

In some embodiments, referring to FIG. 6 , the left wireless headset 110 may provide an inverter (INV) 545 between the RX speech data processor 540 and the digital-to-analog converter 550 in the downlink speech processing path for converting from The RX speech data processor 540 receives the improved speech data (improved speech data), inverts the improved speech data, and outputs the inverted data to the digital-to-analog converter 550, wherein the improved speech data is related to Compensated voice data. However, there is no similar element with an inversion function between the RX speech data processor 640 and the digital-to-analog converter 650 of the right wireless headset 120.

In other embodiments, referring to FIG. 7 , the left wireless headset 110 may set an inverter 535 between the PLC processor 530 and the RX voice data processor 540 in the downlink voice processing path for receiving from the PLC processor 530 For the compensated voice data, invert the compensated voice data, and output the inverted data to the RX voice data processor 540 . However, the PLC processor 630 of the right wireless earphone 120 and the RX voice data processor 640 do not have any similar elements with a phase inversion function.

In other embodiments, referring to FIG. 8 , the left wireless earphone 110 may provide an inverter 555 between the digital-to-analog converter 550 and the amplifier 560 in the downstream speech processing path for receiving the analog signal from the digital-to-analog converter 550 , inverting the analog signal, and outputting the inverted analog signal to the amplifier 560, wherein the analog signal is related to the compensated voice data. However, between the digital-to-analog converter 650 and the amplifier 660 of the right wireless earphone 120 does not have any similar elements with an inversion function.

In other embodiments, referring to FIG. 9 , the right wireless headset 120 may set an inverter 645 between the RX speech data processor 640 and the digital-to-analog converter 650 in the downstream speech processing path for processing from the RX speech data The device 640 receives the improved voice data, inverts the improved voice data, and outputs the inverted data to the digital-to-analog converter 650 . However, there is no similar element with an inversion function between the RX speech data processor 540 and the digital-to-analog converter 550 of the left wireless earphone 110 .

In other embodiments, referring to FIG. 10 , the right wireless headset 120 may set an inverter 635 between the PLC processor 630 and the RX voice data processor 640 in the downlink voice processing path for receiving from the PLC processor 630 For the compensated voice data, invert the compensated voice data, and output the inverted data to the RX voice data processor 640 . However, there is no similar element with an inversion function between the PLC processor 530 and the RX voice data processor 540 of the left wireless headset 110.

In other embodiments, referring to FIG. 11 , the right wireless earphone 120 may have an inverter 655 between the digital-to-analog converter 650 and the amplifier 660 in the downstream speech processing path for receiving the analog signal from the digital-to-analog converter 650 , invert the analog signal, and output the inverted analog signal to the amplifier 660 . However, there is no analogous element with an inversion function between the digital-to-analog converter 550 and the amplifier 560 of the left wireless earphone 110 .

In some embodiments, inverters 555 or 655 as described above may be implemented using analog circuits. In other embodiments, the functions of the inverters 535, 545, 635, 645 as described above may be implemented when the DSP loads and executes specific code.

After the digital voice data is processed by the inverter 545 or 535 as shown in FIG. 6 or FIG. 7 , or when the analog voice signal is processed by the inverter 555 as shown in FIG. 8 , the output of the amplifier 560 is inverted. voice signal. When the digital voice data is processed by the inverter 645 or 635 as shown in FIG. 9 or FIG. 10 , or when the analog voice signal is processed by the inverter 655 as shown in FIG. 11 , the output of the amplifier 660 is inverted. voice signal.

For example, referring to FIG. 12, in the embodiment in which the inverter is only provided in the left wireless earphone 110, the waveform 710 shows the uninverted analog signal output by the amplifier 660 of the right wireless earphone 120, and the waveform 730 shows the left The inverted analog signal output by the amplifier 560 of the wireless earphone 110 . Also, in the embodiment where the inverter is only provided in the right wireless earphone 120 , the waveform 710 shows the uninverted analog signal output by the amplifier 560 of the left wireless earphone 110 , and the waveform 730 shows the amplifier 660 of the right wireless earphone 120 The output of the inverted analog signal. .

For example, referring to FIG. 13 , it is assumed that one wireless earphone (eg, left wireless earphone 110 or right wireless earphone 120 ) does not experience packet loss, but other wireless earphones experience packet loss. Waveform 810 shows the output raw speech signal. Waveform 830 shows the output speech signal after executing the packet loss compensation algorithm. Waveform 850 shows the difference between waveforms 810 and 830 . During a period in which the amplitudes of both waveforms 810 and 830 vary significantly, the amplitude of waveform 850 also varies significantly, unlike waveform 430 of FIG. 4 . Referring back to FIG. 4 , during periods when the amplitudes of both waveforms 410 and 330 vary significantly, the corresponding amplitude of waveform 430 remains substantially constant and only changes significantly during the period during which the compensation packet is output (eg, time interval t30 ) . Referring back to FIG. 8 , compared to the waveform 430 , the signal difference between the waveform 810 and the waveform 830 displayed by the waveform 850 always exists. In such a situation, the two ears of the user 10 continue to hear different voice signals, and accordingly do not feel the popping sound. In addition, no matter whether the inverter is arranged on the downstream voice processing path with or without packet loss, the user will not feel the popping sound.

In order to solve the above problems, an embodiment of the present invention proposes a wireless headset Call quality improvement methods in . Referring to FIG. 14 , the call quality improvement method includes steps S1410 , S1420 , S1430 and S1440 , which are described in detail as follows: Step S1410 : the mobile phone 130 establishes a call connection with the remote communication device. After the mobile phone 130 successfully establishes the call connection, it can send a message to the left wireless earphone 110 and the right wireless earphone 120 to make the left wireless earphone 110 and the right wireless earphone 120 enter the call mode. Once in call mode, the left wireless earphone 110 and the right wireless earphone 120 can configure components therein to allow the data in the radio signal received from the handset 130 to enter the downstream speech processing path for further processing.

Step S1420: One of the left wireless earphone 110 and the right wireless earphone 120 (also referred to as the first wireless earphone) receives the monophonic voice stream from the mobile phone 130, and processes the downlink voice processing path (also referred to as the first wireless earphone) in the first wireless earphone. The voice data or signal (which may be referred to as the first downstream voice processing path) corresponding to the monophonic voice stream (which may also be referred to as the first voice data or signal) is inverted. For the technical details of the inversion, reference may be made to the related contents of FIG. 5 to FIG. 11 , which will not be repeated for brevity.

Step S1430: The other wireless earphones (also referred to as the second wireless earphones) receive the same monophonic voice stream from the mobile phone 130, but do not allow the downlink voice processing path (also referred to as the second downlink) in the second wireless earphones. The voice data or signal (also referred to as the second voice data or signal) on the voice processing path) corresponding to the monophonic voice stream is inverted. For the technical details of non-inversion, reference may be made to the related contents of FIG. 5 to FIG. 11 , which will not be repeated for brevity.

The monophonic voice stream as described above is carried in A2DP packets or bluetooth low energy (BLE packets) packets.

Step S1440: The mobile phone 130 disconnects the call connection from the remote communication device. After the mobile phone 130 successfully disconnects the call connection, it can send a message to the left wireless earphone 110 and the right wireless earphone 120 to make the left wireless earphone 110 and the right wireless earphone 120 leave the call mode.

Through the execution of steps S1420 and S1430, the speakers 250 and 270 can continuously emit different voice signals, so as to avoid the user 10 feeling uncomfortable due to the execution of the PLC algorithm. Crackling sound.

All or part of the steps in the method of the present invention can be implemented by computer instructions, such as DSP code and the like. In addition, it can also be implemented in other types of programs. Those skilled in the art can compose the methods of the embodiments of the present invention into computer instructions, which will not be described for brevity. The computer instructions implemented by the method according to the embodiment of the present invention can be stored in a suitable computer-readable medium, such as DVD, CD-ROM, USB disk, hard disk, or can be stored in other suitable vehicles) to access the web server.

Although the above-described elements are included in FIGS. 5 to 11 , it is not excluded that more other additional elements can be used to achieve better technical effects without departing from the spirit of the invention. In addition, although the flowchart of FIG. 14 is executed in the specified order, those skilled in the art can modify the order of these steps on the premise of achieving the same effect without violating the spirit of the invention. Therefore, the present invention does not It is not limited to use only the sequence as described above. In addition, those skilled in the art can also integrate several steps into one step, or in addition to these steps, perform more steps sequentially or in parallel, and the present invention is not limited thereby.

Although the present invention is described using the above embodiments, it should be noted that these descriptions are not intended to limit the present invention. On the contrary, this invention covers modifications and similar arrangements obvious to those skilled in the art. Therefore, the scope of the appended claims is to be construed in the broadest manner so as to encompass all obvious modifications and similar arrangements.

110: Left wireless headset

115: Microphone

120: Right wireless headset

510, 610: Receiver

520,620: Speech Decoder

530, 630: PLC processor

540,640: RX Voice Data Processor

550,650: Digital to Analog Converter

560, 660: Amplifier

545: Inverter

Claims (16)

A call quality improvement device is applied to a pair of wireless earphones. The call quality improvement device includes: a first wireless earphone, including: a first speaker; and a first downlink voice processing path, coupled to the first speaker , comprising a plurality of first elements for receiving a monophonic voice data from a mobile phone, processing the monophonic voice data to generate a first processed data, and converting the first processed data into a first analog a signal to make the first speaker play the first analog signal; and a second wireless headset, including: a second speaker; and a second downlink voice processing path, coupled to the second speaker, including a plurality of second elements , for receiving the monophonic voice data from the mobile phone, processing the monophonic voice data to generate a second processed data, converting the second processed data into a second analog signal, so that the second speaker Play the above-mentioned second analog signal, wherein an inverter is set on the above-mentioned first downlink voice processing path, which is used to generate a data or signal that is inverse to the received voice data or signal, wherein the above-mentioned second downlink voice processing The inverter is not set on the path, and there is no physical connection between the first downlink voice processing path and the second downlink voice processing path. The device for improving call quality according to claim 1, wherein the first wireless earphone and the second wireless earphone are not connected to each other by a physical line. The call quality improvement device according to claim 1, wherein the first downlink voice processing path comprises a received voice data processor, the inverter and a digital-to-analog converter, and the received voice data processor is used to perform improved call processing A quality algorithm, the digital-to-analog converter is used to convert the digital data into an analog signal, the inverter is coupled between the received voice data processor and the digital-to-analog converter, and is used for the received voice data from the processor Receive a voice data, invert the voice data, and output an inverted data to the digital-to-analog converter. The call quality improvement device according to claim 1, wherein the first downlink voice processing path comprises a packet loss compensation processor, the inverter and a received voice data processor, and the packet loss compensation processor is used for reducing The algorithm for the influence of lost packets, the receiving voice data processor is used for executing the algorithm for improving the call quality, and the inverter is coupled between the packet loss compensation processor and the receiving voice data processor, and is used for receiving the voice data from the above The packet loss compensation processor receives a voice data, inverts the voice data, and outputs an inverted data to the received voice data processor. The call quality improvement device according to claim 1, wherein the first downlink voice processing path comprises a digital-to-analog converter, the inverter and an amplifier, and the digital-to-analog converter is used for converting digital data into an analog signal, The amplifier is used for driving the first speaker to emit sound, and the inverter is coupled between the digital-to-analog converter and the amplifier for receiving an analog signal from the digital-to-analog converter, inverting the analog signal, And output an inverted analog signal to the amplifier. A call quality improvement device used in a wireless headset, the call quality improvement device comprising: a packet loss compensation processor for executing an algorithm for reducing the impact of lost packets; and an inverter coupled to the packet loss Compensation processor, set in the compensation process from the above packet loss It is used to invert a voice data and output the inverted voice data on the down-stream voice processing path formed between the device and a digital-to-analog converter, so that a speaker generates a sound corresponding to the inverted voice data. The device for improving call quality according to claim 6, comprising: a receiving voice data processor, coupled to the packet loss compensation processor, for receiving a compensated voice data from the packet loss compensation processor, and for the compensation The post-voice data executes an algorithm for improving call quality, wherein the inverter is coupled to the received voice data processor, receives an improved voice data from the above-mentioned received voice data processor, inverts the above-mentioned improved voice data, and Output an inverted voice data to the above-mentioned digital-to-analog converter. The device for improving call quality according to claim 6, comprising: a receiving voice data processor coupled to the inverter, wherein the inverter receives a compensated voice data from the packet loss compensation processor, and converts the The compensated voice data is inverted, and an inverted voice data is output to the received voice data processor, wherein the received voice data processor executes an algorithm for improving the call quality for the inverted voice data. The call quality improvement device of claim 6, wherein the function of the inverter is realized when a digital signal processor loads and executes the code. The device for improving call quality according to claim 6, comprising: a receiver for receiving a radio signal from a mobile phone, the radio signal carrying a packet of a voice message of a remote user, wherein the mobile phone and the A remote communication device establishes a call connection, the above-mentioned packet loss compensation The processor is coupled to the receiver for acquiring the voice message of the remote user through the receiver. The call quality improvement device of claim 10, wherein the above-mentioned packets are Advanced Audio Distribution Specification packets or Bluetooth low power consumption packets. The device for improving call quality according to claim 10, wherein the voice message of the remote user is carried in a monaural stream. A method for improving call quality, applied to a pair of wireless earphones, the method for improving call quality includes: a first wireless earphone receives a monophonic voice stream from a mobile phone, and a first wireless earphone in the above-mentioned first wireless earphone A first voice data or signal corresponding to the monophonic voice stream on the downlink voice processing path is inverted; and a second wireless headset receives the monophonic voice stream from the mobile phone, but does not allow the A second voice data or signal corresponding to the monophonic voice stream on a second downstream voice processing path in the second wireless headset is inverted, so that the first speaker in the first wireless headset and the The second speaker in the second wireless headset continuously emits different voice signals, wherein there is no physical connection between the first downlink voice processing path and the second downlink voice processing path. The method for improving call quality according to claim 13, wherein the mobile phone and a remote wireless communication device establish a call connection, and the first wireless headset and the second wireless headset enter a call mode. The call quality improvement method of claim 13, wherein the monophonic voice stream Carry it in an Advanced Audio Distribution Specification packet or a Bluetooth low energy packet. The method for improving call quality according to claim 13, wherein the first wireless earphone and the second wireless earphone are not connected to each other by a physical line.

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