Bluetooth audio transmitting devices, receiving devices, related methods and systems

CN116131867BActive Publication Date: 2026-06-30NANJING ZGMICRO CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING ZGMICRO CO LTD
Filing Date
2022-12-30
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Bluetooth audio transmission devices have low transmission rates, especially in BLE Audio TWS earphone systems based on the CIG link protocol. Limited by the physical layer of BLE Audio (maximum 2Mbps) and the effective bandwidth provided by the CIS link, they can only provide dual-channel lossy compression encoding and isochronous audio streaming services with packet loss compensation at a maximum transmission rate of 248kbps.

Method used

By employing frequency division multiplexing (FDM), multiple Bluetooth audio data packets are transmitted in parallel using a single antenna within a transmission time slot via multi-carrier communication between the Bluetooth audio transmitting device and multiple Bluetooth audio receiving devices. Acknowledgment data packets are received in a time-division multiplexing manner within a reception time slot, thus achieving a transmission method that combines FDM and time-division multiplexing.

Benefits of technology

It improves the transmission rate and reliability of Bluetooth audio data, has a simple structure, enhances transmission efficiency and flexibility, and is suitable for multi-channel audio data transmission.

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Abstract

This invention discloses a Bluetooth audio transmitting device, receiving device, related methods, and system, relating to the field of wireless communication technology, to solve the problem of low transmission rate of Bluetooth audio data. The Bluetooth audio transmitting device includes: a processing unit, N modulation units, a combining unit, a transmitting unit, a receiving unit, and an antenna assembly. The antenna assembly includes a switching unit and an antenna. When the antenna is in a first state, it is connected to the transmitting unit and used to transmit a first radio frequency signal within the transmission time slot of the current isochronous communication interval, thereby transmitting a corresponding set of audio data packets to N Bluetooth audio receiving devices in a frequency division multiplexing manner. When the antenna is in a second state, it is connected to the receiving unit and used to receive a second radio frequency signal on N target links in a time-division multiplexing manner within the reception time slot of the current isochronous communication interval, so as to receive acknowledgment data packets sent by N Bluetooth audio receiving devices respectively. Embodiments of this invention can improve the transmission rate of audio data.
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