CN214413006U

CN214413006U - True wireless stereo earphone

Info

Publication number: CN214413006U
Application number: CN202120567725.4U
Authority: CN
Inventors: 王勇
Original assignee: Beijing Zhongke Shengkong Technology Co ltd
Current assignee: Beijing Zhongke Shengkong Technology Co ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-10-15
Anticipated expiration: 2031-03-19

Abstract

The application provides a true wireless stereo headset. In the true wireless stereo earphone of this application, be provided with corresponding audio module in two earphone units alone respectively, the audio module that utilizes and is independent of the inside wireless communication module of earphone unit stores the audio file, thereby directly transfer the audio file of storage among the audio module and play the media audio frequency, thereby it avoids the lossy compression to the sound source among the wireless transmission process to need not the mobile device end through bluetooth transmission media audio frequency, make its tone quality be equivalent to wired earphone.

Description

True wireless stereo earphone

Technical Field

The application relates to the field of electronic equipment, in particular to a true wireless stereo earphone.

Background

In recent years, bluetooth headsets have been rapidly developed, and particularly, the advent of TWS (True Wireless Stereo) headsets has enabled users to enjoy music by both ears without being bound by headset wires.

However, when the existing TWS headset plays audio, a device end matched with the TWS headset needs to transmit a compressed audio file encoded in a certain format through bluetooth. The higher the sound source quality is, the higher the compression ratio of the sound source code rate in the transmission process is, and finally, the more seriously the sound quality of the earphone is reduced. Therefore, the conventional TWS headset based on wireless transmission usually has poor sound quality, and has a gap in level from a wired headset when listening to high-quality music.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects in the prior art, the present application aims to provide a true wireless stereo headset. This application sets up the audio frequency module respectively through two earphone units at true wireless stereo earphone to tone quality when the earphone broadcast media audio frequency is expected to improve.

To achieve the above object, the present application provides a true wireless stereo headphone, which includes: the earphone comprises a first earphone unit, a second earphone unit and a third earphone unit, wherein a first wireless communication module and a first audio module independent of the first wireless communication module are arranged in the first earphone unit; the second earphone unit is internally provided with a second wireless communication module and a second audio module independent of the second wireless communication module; the first audio module and the second audio module respectively store audio files, and in an audio playing mode, the first earphone unit directly calls the audio files in the first audio module and the second earphone unit directly calls the audio files in the second audio module to play media audio.

Optionally, the true wireless stereo headphone according to any one of the above, wherein each of the first audio module and the second audio module includes: the audio storage unit is used for storing the audio file; and the first decoding unit is used for decoding the audio file and outputting a media audio signal to be played.

Optionally, the wireless stereo headset as described in any of the above, wherein in a bluetooth communication mode, the first wireless communication module and the second wireless communication module are in communication connection with each other or in communication connection with a paired device respectively.

Optionally, the true wireless stereo headset according to any of the above, wherein the first wireless communication module and the second wireless communication module each respectively include: the wireless interaction module is used for receiving a first radio frequency signal sent by the paired equipment and converting the first radio frequency signal into a first baseband signal; and the baseband processing module is provided with a second decoding unit independent of the first decoding unit and used for decoding the first baseband signal and outputting a call voice signal to be played.

Optionally, the wireless stereo headset according to any of the above paragraphs, wherein each of the first and second headset units further comprises: the power amplifier module is simultaneously connected with the first decoding unit and the second decoding unit in the earphone unit; the power amplification module amplifies the media audio signal to be played output by the first decoding unit in an audio playing mode, and amplifies the call voice signal to be played output by the second decoding unit in a Bluetooth call mode.

Optionally, the wireless stereo headphone as described in any above, wherein the audio file stored in the first audio module matches the first channel corresponding to the first headphone unit; and the audio file stored in the second audio module is matched with the second channel corresponding to the second earphone unit.

Optionally, the true wireless stereo headphone as described in any one of the above, wherein the audio file is an uncompressed waveform sound file, and the first decoding unit is a lossless decoding unit.

Optionally, the wireless stereo headset as described in any of the above paragraphs, wherein the audio storage unit is further connected to an expansion interface, and is configured to connect to an external device, receive an audio file and/or a sound effect patch file of the audio file input by the external device, and store the audio file and/or the sound effect patch file in the audio storage unit.

Optionally, the wireless stereo headset according to any of the above paragraphs, wherein the baseband processing module further includes an encoding unit, configured to receive the sound signal collected by the headset unit and perform baseband encoding on the sound signal; the wireless interaction module is further configured to convert a second baseband signal obtained through encoding into a second radio frequency signal, and send the second radio frequency signal to the pairing device.

Optionally, the wireless stereo headset further comprises a flash memory module, wherein the flash memory module is integrated with the audio storage unit.

Compared with the prior art, the method has the following technical effects:

in the true wireless stereo earphone provided by the application, the two earphone units are respectively and independently provided with the corresponding audio modules, and the audio module independent of the wireless communication module in the earphone units is used for storing audio files. The application of the true wireless stereo earphone directly calls the audio files stored in the audio module when the media audio is played, thereby avoiding the lossy compression of the wireless transmission process to the sound source through the Bluetooth transmission media audio at the mobile equipment end, and enabling the tone quality to be equivalent to a wired earphone.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application and not limit the application. In the drawings:

fig. 1 is a schematic diagram of a true wireless stereo headset according to the present application;

fig. 2 is a block diagram of circuitry within one of the earphone units of fig. 1;

fig. 3 is a schematic diagram of a first interaction between two earphone units and a pairing device of a true wireless stereo earphone;

fig. 4 is a schematic diagram of a second interaction between two earphone units and a pairing device of a true wireless stereo earphone;

fig. 5 is a schematic diagram of a third interaction mode between two earphone units and a pairing device of a true wireless stereo earphone.

In the drawings, 1 denotes a first earphone unit; 2 denotes a second earphone unit; and 3 denotes a pairing device.

Detailed Description

The preferred embodiments of the present application will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein only to illustrate and explain the present application and not to limit the present application.

In the present application, the meaning of "and/or" means that the respective cases exist individually or both at the same time.

In this application, "inside and outside" means that the direction from the earphone unit housing to the internal circuitry is inside and vice versa, with respect to the true wireless stereo earphone itself; and not as a specific limitation on the mechanism of the device of the present application.

In the present application, "connected" may mean either a direct connection between components or an indirect connection between components via other components.

Fig. 1 is a schematic structural diagram of a true wireless stereo headset according to the present application. The true wireless stereo headset provided by the application comprises two TWS headset units, wherein:

a first earphone unit 1, in which a first wireless communication module and a first audio module independent of the first wireless communication module are arranged;

the second earphone unit 2 is internally provided with a second wireless communication module and a second audio module independent of the second wireless communication module;

the first audio module and the second audio module are respectively stored with audio files.

Therefore, the earphone provided by the application can be used in an audio playing mode: the audio file in the first audio module is directly called through the first earphone unit 1, and the audio file in the second audio module is directly called through the second earphone unit 2 synchronously, so that the media audio is played in stereo.

In the bluetooth communication mode, the first wireless communication module in the first headset unit 1 and the second wireless communication module in the second headset unit 2 respectively implement communication interaction with a pairing device 3 (e.g., a smart phone) connected to the headset bluetooth in any one of the manners shown in fig. 3 to 5.

In the mode of fig. 3, the pairing device 3 interacts with one of the headset units 1 (master headset) to transmit voice data packets of two headset channels; the earphone unit 1 serves as a relay terminal for transmitting a voice packet corresponding to the channel of the other earphone unit to the other earphone unit 2 (slave earphone).

In the mode of fig. 4, the pairing device 3 interacts with one of the earphone units 1 (without distinguishing between the master and the slave), and the other earphone unit 2 monitors the communication connection between the two, and establishes connection with the pairing device 3. The pairing device 3 transmits the voice data packets of all channels to the two earphone units at the same time, but each earphone unit receives only the voice data packet corresponding to its own channel.

In the mode of fig. 5, the pairing device 3 interacts directly with the two earphone units, but in the mode different from the mode of fig. 4, the pairing device 3 transmits a voice data packet corresponding to the channel of each earphone unit to each earphone unit.

The internal circuit structure of each earphone unit can be specifically described with reference to fig. 2, and is configured to include:

High-Fidelity (High-Fidelity) audio module applied to audio playing mode

Wherein, the audio module can further comprise: an audio storage unit for storing audio files, in particular high-quality large-volume audio files; and the first decoding unit is specially used for decoding the audio files stored in the audio storage unit and outputting the media audio signals to be played. The audio storage unit may be implemented as a non-volatile storage unit such as a Flash memory (Flash).

Preferably, the uncompressed waveform sound (WAV) file may be directly stored in the audio storage unit. WAV is a standard lossless audio format, and records the true waveform of sound by PCM (Pulse Code Modulation) data. In order to enable an audio storage unit with a certain capacity to store more songs, in some embodiments, lossless audio files such as FLAC and APE obtained by lossless compression of PCM data may also be stored in the audio storage unit. Correspondingly, the first decoding unit may be a lossless decoding unit, and is configured to decode lossless files such as WAV, FLAC, APE, and the like, where FLAC and APE are files obtained by compressing PCM data through data reconstruction such as huffman coding, and thus the restored waveform after decoding is consistent with the WAV file.

Considering that two earphone units correspond to one sound channel respectively, in the TWS earphone of the present application, in the process of storing an audio file, an audio file matching with the first sound channel corresponding to the first earphone unit may be stored in the first audio module of the first earphone unit, and an audio file matching with the second sound channel corresponding to the second earphone unit may be stored in the second audio module of the second earphone unit. That is, for each song, the audio storage unit in the left earphone unit only needs to store the left channel data of the song, and the audio storage unit in the right earphone unit only needs to store the right channel data of the song, so that on the premise of realizing the binaural playing, the audio storage unit with a certain capacity can store as many songs as possible.

Further, in order to facilitate management of audio files locally stored in the TWS headset, the present application may further provide a wired data interface as an extension interface in the headset unit. The audio storage unit is in wired connection with external electronic equipment (a PC (personal computer), a smart phone and the like) through an expansion interface, and receives and stores an audio file (new song) and a sound effect patch file of the audio file (existing song and new song) transmitted by the external electronic equipment through a data line.

That is, besides the audio files burned in the audio storage unit in advance when the TWS headset is factory set, the TWS headset can support the external device to add, delete, render sound effects and other operations on the audio files in the audio storage unit through the expansion interface.

Wireless communication module applied to Bluetooth communication mode

Taking the bluetooth module as an example, the inside of the wireless communication module of each earphone unit can be set to include: the wireless interactive module is provided with a radio frequency module interface, the baseband processing module is provided with a baseband module interface, and the radio frequency module interface is mutually connected with the baseband module interface to realize data interaction.

Wherein, wireless interaction module realizes wireless communication between earphone unit and the equipment of pairing or realizes wireless communication between two earphone units through antenna transmission and receiving electromagnetic wave:

in the uplink communication process, after a voice signal collected by a call microphone on the earphone is coded and processed into a baseband signal by a coding unit in a baseband processing module, the baseband signal is modulated into a radio frequency signal by a baseband module interface-radio frequency module interface and a wireless interaction module and then is sent to the pairing equipment;

in the downlink communication process, radio frequency signals sent by the matched equipment such as the mobile phone and the like enter the wireless interaction module through the antenna, are demodulated into baseband signals through the wireless interaction module, then pass through the radio frequency module interface-baseband module interface, and are decoded into call voice signals to be played through a second decoding unit in the baseband processing module.

It should be noted that, the first decoding unit in the HiFi audio module and the second decoding unit in the wireless communication module are not only different in application stage and independent in function, but also the two related underlying processing units can be independent from each other in terms of circuit structure deployment.

After the first decoding unit outputs the media audio signal to be played (in a music listening stage) or the second decoding unit outputs the call voice signal to be played (in a call making stage), a power amplification module in the earphone unit amplifies the signal so as to drive a loudspeaker to play.

In addition, the bluetooth module may be further connected with an off-chip expansion flash memory unit for supporting a technically complicated or highly optimized digital audio processing process, such as panoramic sound rendering and the like. As shown in fig. 2, the HiFi audio module of the TWS headset of the present application can reuse the extended flash memory unit connected to the bluetooth module, for storing audio files. The audio storage unit of the HiFi audio module may be independent of the expansion flash memory unit of the wireless interactive module, or may be integrated with the expansion flash memory unit of the wireless interactive module as shown in fig. 2. The first decoding unit may also be connected to the extended flash memory unit for decoding the audio data stored therein.

Therefore, the TWS earphone provided by the application can directly store audio data through the internal storage unit of the TWS earphone, other devices are not required to send the audio data for playing to the earphone in real time through Bluetooth, the tone quality loss caused by the processes of wireless transmission and the like is avoided, a user can experience high-quality music enjoyment equivalent to a wired earphone, and the normal use of functions such as Bluetooth communication and the like is not influenced.

Those of ordinary skill in the art will understand that: although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A true wireless stereo headset, comprising:

the earphone comprises a first earphone unit, a second earphone unit and a third earphone unit, wherein a first wireless communication module and a first audio module independent of the first wireless communication module are arranged in the first earphone unit;

the second earphone unit is internally provided with a second wireless communication module and a second audio module independent of the second wireless communication module;

the first audio module and the second audio module are respectively stored with audio files,

in an audio playing mode, the first earphone unit directly calls the audio file in the first audio module, and the second earphone unit directly calls the audio file in the second audio module to play media audio.

2. The true wireless stereo headphone of claim 1, wherein each of the first audio module and the second audio module comprises:

the audio storage unit is used for storing the audio file;

and the first decoding unit is used for decoding the audio file and outputting a media audio signal to be played.

3. The wireless stereo headset of claim 2, wherein the first wireless communication module and the second wireless communication module are communicatively connected to each other or to a counterpart device respectively in a bluetooth communication mode.

4. The true wireless stereo headset of claim 3, wherein the first wireless communication module and the second wireless communication module each respectively comprise:

the wireless interaction module is used for receiving a first radio frequency signal sent by the paired equipment and converting the first radio frequency signal into a first baseband signal;

and the baseband processing module is provided with a second decoding unit independent of the first decoding unit and used for decoding the first baseband signal and outputting a call voice signal to be played.

5. The true wireless stereo headphone of claim 4, wherein each of the first headphone unit and the second headphone unit further comprises: the power amplifier module is simultaneously connected with the first decoding unit and the second decoding unit in the earphone unit;

the power amplification module amplifies the media audio signal to be played output by the first decoding unit in an audio playing mode, and amplifies the call voice signal to be played output by the second decoding unit in a Bluetooth call mode.

6. The true wireless stereo headset of claim 1, wherein the audio file stored in the first audio module matches a first channel to which the first headset unit corresponds;

and the audio file stored in the second audio module is matched with the second channel corresponding to the second earphone unit.

7. The true wireless stereo headphone of claim 2, wherein the audio file is an uncompressed waveform sound file and the first decoding unit is a lossless decoding unit.

8. The true wireless stereo headset according to claim 2, wherein the audio storage unit is further connected to an expansion interface for connecting with an external device, receiving an audio file and/or a sound effect patch file of the audio file inputted by the external device, and storing the audio file and/or the sound effect patch file in the audio storage unit.

9. The true wireless stereo headphone of claim 4, wherein the baseband processing module further comprises an encoding unit for receiving sound signals collected by the headphone unit and baseband encoding the sound signals; the wireless interaction module is further configured to convert a second baseband signal obtained through encoding into a second radio frequency signal, and send the second radio frequency signal to the pairing device.

10. The true wireless stereo headset of claim 4, wherein the audio storage unit is integrated with an extended flash memory of the wireless interaction module.