Bluetooth earphone with low-delay dynamic switching of simultaneous connection to multiple audio devices

Abstract

This utility model relates to the field of Bluetooth headsets and discloses a Bluetooth headset with low-latency dynamic switching that can simultaneously connect to multiple audio devices. It includes a housing, a circuit board for processing Bluetooth signals, and an antenna for receiving and transmitting Bluetooth signals. The Bluetooth headset also includes an automatic switching module for intelligent device switching, a speaker for playing audio, and a power module. This utility model enables intelligent dynamic switching between multiple devices by pre-pairing multiple audio devices with the Bluetooth headset and storing them in a list of connectable devices. The system employs a priority-based hierarchical mechanism, where high-priority devices can actively preempt the current connection of low-priority devices, while low-priority devices cannot interrupt the existing connection of high-priority devices. This ensures that when a user answers a call, the headset can instantly switch to the calling device, establish a stable connection, and guarantee call quality, while maintaining the standby connection of other paired devices.

Description

Technical Field

[0001] This utility model relates to the field of Bluetooth headset technology, specifically to a Bluetooth headset that can simultaneously connect to multiple audio devices with low latency and dynamic switching. Background Technology

[0002] Bluetooth headsets are audio output devices that connect to electronic devices via Bluetooth wireless communication. They are also input devices that wirelessly transmit locally picked-up audio signals to electronic devices. They are commonly connected to mobile phones, computers, tablets, cars, smart wearable devices, etc. During use, Bluetooth headsets usually communicate with only one device. If you need to switch from one connected device to another, you need to switch manually.

[0003] A search revealed Chinese patent CN215734778U, which discloses a wireless Bluetooth headset. By setting a signal processing circuit on the circuit board to process Bluetooth signals and a second type of wireless signal, the wireless Bluetooth headset can receive and process the second type of wireless signal. This allows the wireless Bluetooth headset of this utility model to not only establish a connection with other electronic devices via Bluetooth for audio signal transmission, but also to be used independently to receive the second type of wireless signal, thus improving the functional versatility of the wireless Bluetooth headset.

[0004] The aforementioned utility model is similar to existing technologies. Existing Bluetooth headsets can connect to multiple devices individually, but cannot connect to multiple devices simultaneously. When a user connects a Bluetooth headset to a computer and receives an incoming call, they need to connect the Bluetooth headset to their phone to answer the call. At this time, they need to manually turn off the computer's Bluetooth connection and turn on the phone's Bluetooth connection. The connection delay is generally more than two seconds, and frequent manual operations can easily lead to chaotic device connection status, seriously affecting the user experience. Especially when using cross-platform devices together, differences in Bluetooth protocols between different systems can also cause connection conflicts. Based on this, a Bluetooth headset with low latency and dynamic switching that can simultaneously connect to multiple audio devices is proposed to solve the above problems. Utility Model Content

[0005] Based on the above description, this utility model provides a Bluetooth headset that can connect to multiple audio devices simultaneously with low latency and dynamic switching, in order to solve the problem that existing Bluetooth headsets can connect to multiple devices separately, but cannot connect to multiple devices simultaneously.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A Bluetooth headset with low latency dynamic switching that can connect to multiple audio devices simultaneously includes a shell, a circuit board for processing Bluetooth signals, and an antenna for receiving and transmitting Bluetooth signals.

[0007] The circuit board is placed inside the cavity of the housing, and the antenna is electrically connected to the circuit board;

[0008] The Bluetooth headset also includes an automatic switching module for intelligent device switching, a speaker for playing audio, and a power module for powering the circuit board, the automatic switching module, and the speaker.

[0009] By using the above technical solution, multiple audio devices are pre-paired with Bluetooth headsets and stored in a list of connectable devices, enabling intelligent dynamic switching between multiple devices. The system adopts a priority-based hierarchical mechanism, where high-priority devices (such as incoming calls) can actively preempt the current connection of low-priority devices (such as music playback), while low-priority devices cannot interrupt the existing connection of high-priority devices. This ensures that when a user answers a call, the headset can immediately switch to the calling device, establish a stable connection, and guarantee call quality, while maintaining the standby connection of other paired devices.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the inner cavity of the housing is provided with a metal shielding chamber with a thickness of 3-5mm, and the circuit boards are respectively arranged in the metal shielding chamber;

[0012] The metal shielding chamber is made of aluminum alloy and has multiple heat dissipation micro-holes.

[0013] Through the above technical solution, the metal shielding chamber can effectively isolate electromagnetic interference and improve signal stability, and the multiple heat dissipation micro-holes can achieve heat dissipation function.

[0014] Furthermore, the circuit board integrates a chipset for processing signals from different devices. The chipset includes a master control chip and a slave chip. The master control chip is model QCC5144, and the slave chip is model QCC3040.

[0015] Through the above technical solution, the circuit board integrates the main control chip and the slave chip, and the two chips work together to process audio data streams from different devices in parallel, reducing switching latency.

[0016] Furthermore, the automatic switching module includes an audio acquisition and processing unit, a spectrum analysis module, a priority register, a device matching engine, and a signal amplifier.

[0017] Through the above technical solution, the automatic switching module enables users to automatically and intelligently switch between multiple devices as needed when using Bluetooth headsets, improving the convenience of use and ensuring smooth and low-latency switching.

[0018] Furthermore, the signal amplifier is a low-noise wideband operational amplifier with an adjustable gain range of 0-30dB.

[0019] The above technical solution can match the output level differences of different connected devices in real time, eliminate the sudden volume changes when switching between multiple devices, and ensure stability in weak signal scenarios.

[0020] Furthermore, the audio acquisition and processing unit includes a microphone for acquiring ambient sound signals, an analog-to-digital converter for converting analog sound signals into digital signals, and a pre-buffer memory for reducing latency.

[0021] The above technical solution allows for the acquisition of sound signals via a microphone, which are then converted by an analog-to-digital converter and transmitted to a pre-buffered memory, ensuring seamless splicing of audio streams during switching.

[0022] Furthermore, the pre-cache memory uses a low-latency DDR3L chip with a capacity of 64MB.

[0023] The above technical solution features ultra-low access latency, enabling real-time buffering of 200ms audio data, effectively addressing network jitter and signal interruptions, while ensuring seamless switching of audio streams from multiple devices.

[0024] Furthermore, the shell includes two shell plates with an elliptical cross-section. Limiting protrusions are fixed at both the upper and lower ends of the left shell plate facing the right shell plate, and limiting grooves adapted to the outer diameter of the limiting protrusions are opened at both the upper and lower ends of the right shell plate facing the left shell plate.

[0025] The above technical solution allows the limiting groove to facilitate the entry of the limiting protrusion on the left shell plate into the limiting groove on the right shell plate, thus facilitating precise alignment between the two shell plates.

[0026] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0027] By pre-pairing multiple audio devices with Bluetooth headsets and storing them in a list of connectable devices, the system enables intelligent dynamic switching between multiple devices. The system adopts a priority-based mechanism, where high-priority devices (such as incoming calls) can proactively take over the current connection of low-priority devices (such as music playback), while low-priority devices cannot interrupt the existing connection of high-priority devices. This ensures that when a user answers a call, the headset can immediately switch to the calling device, establish a stable connection, and guarantee call quality, while maintaining the standby connection of other paired devices. Attached Figure Description

[0028] Figure 1 A schematic diagram of the overall structure of a Bluetooth headset that can simultaneously connect to multiple audio devices and switch with low latency in an embodiment of this utility model;

[0029] Figure 2This is a schematic diagram of the circuit board structure according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the automatic switching module in an embodiment of the present invention.

[0031] Reference numerals: 1. Housing; 2. Circuit board; 3. Antenna;

[0032] 4. Automatic switching module; 41. Spectrum analysis module; 42. Priority register; 43. Device matching engine; 44. Signal amplifier; 45. Microphone; 46. Analog-to-digital converter; 47. Pre-buffered memory;

[0033] 5. Speaker; 6. Power module. Detailed Implementation

[0034] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0036] Example: Reference Figure 1 and Figure 2 A Bluetooth headset that can simultaneously connect to multiple audio devices with low latency and dynamic switching includes a housing 1, a circuit board 2 for processing Bluetooth signals, and an antenna 3 for receiving and transmitting Bluetooth signals; the circuit board 2 is placed inside the housing 1, and the antenna 3 is electrically connected to the circuit board 2; the Bluetooth headset also includes an automatic switching module 4 for intelligent switching of devices, a speaker 5 for playing audio, and a power module 6 for powering the circuit board 2, the automatic switching module 4, and the speaker 5.

[0037] The inner cavity of the housing 1 is equipped with a metal shielding chamber with a thickness of 3-5mm, and the circuit board 2 is placed inside the metal shielding chamber; the metal shielding chamber is made of aluminum alloy and has multiple heat dissipation micro-holes.

[0038] In this embodiment, the circuit board 2 integrates a chipset for processing signals from different devices. The chipset includes a master control chip and a slave chip. The master control chip is a QCC5144 and the slave chip is a QCC3040. The master control chip integrates an independent DSP core to process ANC / ENC algorithms and is responsible for high-priority calls. The slave chip has a built-in hardware audio buffer and is used to process background audio streams.

[0039] It should be noted that the shell 1 includes two shell plates with an elliptical cross-section. The upper and lower ends of the left shell plate facing the right shell plate are fixed with limiting protrusions. The upper and lower ends of the right shell plate facing the left shell plate are provided with limiting grooves that are adapted to the outer diameter of the limiting protrusions. When the two shell plates are put together, the positions of the two shell plates can be limited by the limiting grooves and limiting protrusions, so that the two shell plates can be accurately aligned and easy to fix.

[0040] refer to Figure 3 The automatic switching module 4 includes an audio acquisition and processing unit, a spectrum analysis module 41, a priority register 42, a device matching engine 43, and a signal amplifier 44. The spectrum analysis module 41 can perform real-time spectrum analysis on the audio signal and identify device characteristics. The priority register 42 is used to store user-preset or system-default device priorities. The device matching engine 43 can quickly match the target device based on spectrum characteristics and priorities.

[0041] Among them, the signal amplifier 44 adopts a low-noise wideband operational amplifier with an adjustable gain range of 0-30dB.

[0042] Understandably, feature values ​​are extracted from all devices that have completed connection setup. The priority of device connection is identified based on these feature values. Higher priority devices can interrupt the connection of lower priority devices, but lower priority devices cannot interrupt the connection of higher priority devices. By setting the call to high priority, it is possible to ensure that the Bluetooth headset and device have completed connection and pairing when the user makes a call, thus ensuring a normal call. After the call ends, it automatically switches back to the lower priority device.

[0043] In this embodiment, the audio acquisition and processing unit includes a microphone 45 for acquiring ambient sound signals, an analog-to-digital converter 46 for converting analog sound signals into digital signals, and a pre-buffer memory 47 for reducing latency.

[0044] The pre-cache memory 47 uses a low-latency DDR3L chip with a capacity of 64MB.

[0045] In use, when the Bluetooth headset microphone 45 collects the sound signal, it is converted by the analog-to-digital converter 46 and then transmitted to the pre-buffer memory 47. Then it is transmitted to the spectrum analysis module 41 to perform spectrum analysis on the sound signal. If no characteristic signal from the new device is detected, the sound signal is amplified by the signal amplifier 44 according to the normal procedure and sent to the speaker 5. If a characteristic signal from the new device is detected (such as a mobile phone ringing and needing to answer the phone), the Bluetooth headset automatically switches to the new device.

[0046] It should be noted that the Bluetooth headset has multiple touch-sensitive buttons that are electrically connected to the main control chip, including volume control buttons and a pause button.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A Bluetooth headset with low latency dynamic switching that can simultaneously connect to multiple audio devices, comprising a housing (1), a circuit board (2) for processing Bluetooth signals, and an antenna (3) for receiving and transmitting Bluetooth signals; characterized in that The circuit board (2) is placed inside the housing (1), and the antenna (3) is electrically connected to the circuit board (2); The Bluetooth headset also includes an automatic switching module (4) for intelligent switching of devices, a speaker (5) for playing audio, and a power supply module (6) for powering the circuit board (2), the automatic switching module (4) and the speaker (5).

2. The Bluetooth earphone of claim 1, simultaneously connecting multiple audio devices with low delay dynamic switching, wherein, The inner cavity of the housing (1) is provided with a metal shielding chamber with a thickness of 3-5mm, and the circuit board (2) is placed inside the metal shielding chamber; The metal shielding chamber is made of aluminum alloy and has multiple heat dissipation micro-holes.

3. The Bluetooth earphone of claim 1, wherein, The circuit board (2) integrates a chipset for processing signals from different devices. The chipset includes a master control chip and a slave chip. The master control chip is model QCC5144 and the slave chip is model QCC3040.

4. The Bluetooth earphone of claim 1, wherein, The automatic switching module (4) includes an audio acquisition and processing unit, a spectrum analysis module (41), a priority register (42), a device matching engine (43), and a signal amplifier (44).

5. The Bluetooth earphone of claim 4, wherein, The signal amplifier (44) is a low-noise wideband operational amplifier with an adjustable gain range of 0-30dB.

6. The Bluetooth earphone of claim 4, wherein, The audio acquisition and processing unit includes a microphone (45) for acquiring ambient sound signals, an analog-to-digital converter (46) for converting analog sound signals into digital signals, and a pre-buffer memory (47) for reducing latency.

7. The Bluetooth earphone of claim 6, simultaneously connecting multiple audio devices with low delay dynamic switching, characterized in that, The pre-cache memory (47) uses a low-latency DDR3L chip with a capacity of 64MB.

8. The Bluetooth earphone of claim 1, simultaneously connecting multiple audio devices with low delay dynamic switching, characterized in that, The shell (1) includes two shell plates with an elliptical cross-section. The upper and lower ends of the left shell plate facing the right shell plate are fixed with limiting protrusions, and the upper and lower ends of the right shell plate facing the left shell plate are provided with limiting grooves that are adapted to the outer diameter of the limiting protrusions.

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