Spatialized Audio RF Transmissions Directional Localization
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Solution Overview
Problem
Existing radio systems lack the ability to spatially localize audio transmissions, making it difficult for operators to discern the direction of incoming communications, especially in scenarios with multiple simultaneous transmissions, leading to jumbled audio and reduced intelligibility.
Innovation Solution
The implementation of a spatialized audio system that utilizes orientation trackers and GPS sensors to encode geographical location data into RF transmissions, allowing receiving devices to generate binaural representations and spatialize audio, effectively placing the sound source in a specific direction relative to the operator's heading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If basic push-to-talk functions are used to transmit and render audio, then the system maintains simplicity and compatibility, but the radio operator cannot discern the direction of incoming communications
Solution Approach 1:
The patent transforms 2D audio playback into 3D spatial audio by incorporating directional information. The system uses GPS coordinates and orientation data to create a three-dimensional audio space where sounds are positioned according to their geographic origin and the operator's heading, enabling intuitive direction localization without complex hardware modifications.
Solution Approach 2:
The patent introduces a spatial audio processing module as an intermediary between the basic PTT audio transmission and the operator's ears. This module processes audio signals by applying spatialization algorithms that use GPS and orientation data to calculate appropriate audio positioning, serving as a bridge that adds directional information without requiring fundamental changes to the radio system architecture.
2Productivity
If multiple simultaneous transmissions are received, then communication capacity increases, but audio becomes jumbled and intelligibility decreases
Solution Approach 1:
The patent applies different audio processing characteristics to different sound sources based on their spatial location. Each transmission is positioned in a specific direction and distance, allowing the operator's brain to naturally separate and process multiple audio streams based on their spatial origins, thereby maintaining intelligibility even when multiple communications occur simultaneously.
Solution Approach 2:
By adding the spatial dimension to audio mixing, the system transforms a two-dimensional audio problem (multiple overlapping sounds) into a three-dimensional spatial arrangement. This allows simultaneous transmissions to be distributed across different spatial locations rather than competing in the same auditory space, significantly improving distinguishability and intelligibility.
3Measurement precision
If GPS and orientation tracking are integrated into the radio system, then spatial audio localization is achieved, but device complexity and power consumption increase
Solution Approach 1:
The system performs preliminary actions by continuously tracking GPS location and orientation data in advance of audio processing. This allows the spatial audio calculation to use pre-computed positional information rather than calculating positions in real-time during audio playback, reducing computational load and power consumption during critical audio rendering operations.
Solution Approach 2:
The radio device utilizes existing GPS and orientation sensors that are already integrated into modern mobile devices, rather than adding dedicated specialized hardware. This self-service approach leverages existing components to provide spatial audio functionality, minimizing additional power consumption and device complexity.
Data Source
AI summary
The present disclosure is generally directed to an approach for spatializing audio from a received radio transmission to allow a radio operator to audibly perceive audio from the received radio transmission as if originating from a direction that corresponds to a physical location of the transmitting radio. On the receiving side, also referred to herein as a receive (RX) pipeline, a radio device configured consistent with the present disclosure includes utilizing an orientation tracker, and head related transform functions to generate a binaural representation of an incoming transmission such that audio associated with the same gets spatialized to sound as if coming from a direction corresponding to the transmitting radio. On the transmit side, also referred to herein as the transmit (TX) pipeline, includes utilizing a location sensor (e.g., a time of flight and/or GPS sensor) and encoding scheme such that radio transmissions include associated geographical location data.