Dual-Mode Bluetooth Audio Latency Synchronization
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Solution Overview
Problem
Dual-mode Bluetooth low energy multimedia devices face synchronization challenges between BR/EDR and BLE sound systems, as the upcoming BLE audio profile will not support retro-compatibility with existing BR/EDR devices, leading to synchronization issues between different sound systems.
Innovation Solution
A device and method for controlling dual-mode Bluetooth low energy multimedia devices that synchronizes both sound systems by determining latency values for each system, separating and delaying multimedia streams accordingly, and transmitting them to ensure simultaneous synchronization across BR/EDR and BLE sound systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual-mode BLE multimedia device uses both BR/EDR and BLE sound systems simultaneously, then compatibility with existing BR/EDR devices and future BLE devices is improved, but synchronization between the two sound systems deteriorates
Solution Approach 1:
The patent introduces a control device as an intermediary between the BR/EDR sound system and BLE sound system. This control device receives multimedia streams, determines latency values for both systems, separates the streams, applies appropriate delays, and transmits them to respective sound systems. The intermediary coordinates the two independent sound systems, ensuring they remain synchronized despite operating on different protocols and latency characteristics.
2Reliability
If separate latency values are determined and applied for BR/EDR and BLE sound systems, then synchronization between systems is improved, but device complexity increases
Solution Approach 1:
The control device performs preliminary actions by determining latency values for both BR/EDR and BLE sound systems before transmitting the multimedia stream. It calculates the required delay for each system in advance, separates the stream accordingly, and prepares the delayed streams for transmission. This preliminary processing ensures that when the streams are transmitted to the sound systems, they are already configured for synchronized playback, avoiding the need for complex real-time adjustment mechanisms.
Data Source
AI summary
The description relates to a device (CTRL-DEV) for controlling a dual-mode Bluetooth low energy multimedia device (DM-BLE), the dual-mode BLE multimedia device comprising a first sound system (SS1) and a second sound system (SS2) which are arranged to simultaneously stream an input multimedia stream, the first and second sound systems being respectively associated with at least one first Bluetooth multimedia device (SPK1, SPK2, SPKN) and at least one Bluetooth multimedia device (BLE-SPK1, BLE-SPK2, BLE-SPKN). The description also refers to a dual-mode Bluetooth low energy multimedia device (DM-BLE′), a method, a computer program and a non-transitory computer-readable storage medium.