Dual-Transceiver Wireless Audio Forwarding via SVFP
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Solution Overview
Problem
Existing wireless audio systems face difficulties in securely establishing wireless connections and converting audio between analog and digital forms, particularly in providing call audio to both ears of a user and sharing it with another user, due to their point-to-point nature.
Innovation Solution
A dual-transceiver wireless audio system is configured to forward call audio from a first wireless transceiver to a second wireless transceiver over a simple voice forward profile (SVFP) connection, using a dedicated radio frequency communication (RFCOMM) channel and synchronous connection-oriented (SCO) link, allowing for call audio and control data exchange without a hands-free profile (HFP) connection, enabling synchronization of audio playback between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If point-to-point wireless connections are used, then secure connection establishment is achieved, but the ability to provide call audio to both ears and share with another user is limited
Solution Approach 1:
The system segments the audio transmission path by introducing an intermediary device that receives audio from a first wireless transceiver and forwards it to a second wireless transceiver. This segmentation allows the audio stream to be distributed to multiple destinations (both ears or shared with another user) while maintaining secure point-to-point connections at each segment, thus resolving the contradiction between connection security and audio sharing versatility.
Solution Approach 2:
An intermediary device acts as a mediator between wireless transceivers, receiving call audio and control data from a first transceiver via a secure point-to-point connection and forwarding it to a second transceiver. This intermediary enables audio sharing and dual-ear playback without compromising the security of individual connection segments, as each connection remains point-to-point while the system as a gain achieves versatility.
2Adaptability or versatility
If standard Bluetooth hands-free profile is used, then compatibility is achieved, but delay control and resource efficiency are insufficient
Solution Approach 1:
The system changes the communication parameter by using a customized Simple Voice Forward Profile (SVFP) instead of the standard Hands-Free Profile. This parameter change enables optimized audio transmission with better delay control and resource efficiency. The SVFP allows for tailored transmission intervals and buffering strategies that reduce latency while maintaining compatibility through standardized protocols at the interface level.
Data Source
AI summary
Various implementations include dual-transceiver wireless audio systems configured to forward call audio from a first wireless transceiver to a second wireless transceiver over a simple voice forward profile (SVFP) connection. In other implementations, a computer-implemented method is disclosed for controlling a dual-transceiver wireless calling system. In still other implementations, a wireless headphone system is configured to forward call audio from a first headphone to a second headphone over the SVFP connection.