BLE Audio Broadcast Volume Sync for Multi-Member Bluetooth Playback
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Solution Overview
Problem
The Bluetooth LE Audio technology does not specify how to flexibly adjust audio volume, particularly for synchronizing audio volume across multiple Bluetooth devices during audio broadcasting, leading to potential discomfort or disturbance for users due to unpredictable volume levels.
Innovation Solution
A Bluetooth audio broadcasting system that includes an audio broadcasting device transmitting volume instructions to multiple Bluetooth member devices, allowing them to configure and adjust their audio playback volumes before broadcasting, ensuring a consistent and comfortable volume level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the BLE Audio technology is used for audio broadcasting without volume configuration instructions, then the audio transmission quality and power efficiency are improved, but the audio volume becomes unpredictable and may cause user discomfort
Solution Approach 1:
The audio broadcasting device sends volume configuration instructions to member devices before actually broadcasting the audio content. This preliminary action allows receiving devices to pre-configure their audio playback volumes based on the provided instructions, ensuring comfortable and predictable audio experience from the start without requiring user manual adjustment.
2Device complexity
If the audio volume is not pre-configured in multi-member Bluetooth devices, then the system complexity is reduced, but the audio playback experience becomes inconsistent across different devices
Solution Approach 1:
The system provides different volume configuration approaches for different member devices. Each device receives volume instructions tailored to its specific characteristics and playback capabilities, allowing flexible and adaptive volume control across diverse device types while maintaining a relatively simple overall system architecture.
3Manufacturing precision
If volume instructions are transmitted before audio broadcasting, then the audio volume consistency across multiple devices is improved, but the communication overhead and system complexity increase
Solution Approach 1:
The audio broadcasting device acts as an intermediary that sends volume configuration instructions to all member devices before audio playback. This intermediary approach ensures that all devices receive and process the same volume guidance information, achieving consistent audio experience across the group without requiring complex peer-to-peer negotiation protocols between devices.
Data Source
AI summary
A Bluetooth audio broadcasting system includes: an audio broadcasting device, a first Bluetooth member device, and a second Bluetooth member device. The audio broadcasting device broadcasts BLE audio packets and transmits a predetermined volume instruction to the first Bluetooth member device and the second Bluetooth member device before broadcasting the BLE audio packets. The first Bluetooth member device parses the BLE audio packets to acquire a predetermined audio data, controls a first audio playback circuit to playback the predetermined audio data, and configures an audio volume of the first audio playback circuit in advance according to the predetermined volume instruction. The second Bluetooth member device parses the BLE audio packets to acquire the predetermined audio data, controls a second audio playback circuit to playback the predetermined audio data, and configures an audio volume of the second audio playback circuit in advance according to the predetermined volume instruction.