Smart Mic LMR Cellular System Audio Interference Suppression

The patent introduces an intermediary mechanism (gateway) that connects the LMR server and PTToC server, which manages and coordinates communications between the two systems. This intermediary prevents direct audio feedback loops by controlling how audio streams are routed and suppressed across the different communication paths, thereby resolving the audio interference issue while maintaining system versatility.

The patent extracts and suppresses the harmful audio stream that would otherwise create self-hearing. When a transmission is detected on one path (e.g., LMR), the system identifies and removes the corresponding incoming audio stream on the other path (e.g., PTToC) that would contain the user's own voice. This selective extraction and suppression eliminates the self-hearing effect while preserving normal communication functionality.

The patent implements a feedback mechanism where the system monitors transmissions on one path and uses this information to control reception on the other path. When data is transmitted over PTToC, the system generates feedback information that triggers suppression of incoming data on the LMR path. This feedback loop prevents duplicate data transmissions while maintaining efficient data communication capability across both systems.