Spatial Audio Processing for Vehicle Navigation Prompts
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Solution Overview
Problem
Current navigation systems fail to effectively convey localization and distance information through audible prompts, making it difficult for users to understand the spatial context of upcoming turns.
Innovation Solution
The audio signal associated with navigation prompts is processed based on localization and distance information from the navigation system, adjusting amplitude, phase, and mixing ratios to create a spatial sound field that simulates the direction and distance of the prompt, allowing users to perceive the position within the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional audio prompts are used without spatial processing, then the navigation system is simple and easy to operate, but the user cannot perceive direction and distance information from the audio cues
Solution Approach 1:
The patent applies spatial audio processing to add a dimensional aspect to navigation prompts. By processing audio signals through multiple channels with different time delays and amplitude adjustments, the system creates a three-dimensional sound field that conveys direction and distance information, transforming flat 2D audio into immersive 3D spatial audio that helps users perceive their position and upcoming maneuvers.
Solution Approach 2:
The system dynamically changes audio parameters including time delay, amplitude, and spatial position based on navigation data. The audio processing unit adjusts these parameters in real-time according to the vehicle's location and the upcoming turn characteristics, allowing the same navigation prompt to convey different spatial information depending on the contextual parameters provided by the navigation system.
2Measurement precision
If audio signals are processed to emulate localization and distance, then users can perceive spatial position, but the audio processing complexity and computational requirements increase
Solution Approach 1:
The patent introduces an audio processing unit as an intermediary between the navigation system and the speakers. This intermediary component receives navigation data (localization and distance information) and transforms it into appropriate audio signal adjustments, acting as a mediator that converts spatial information into perceptual audio cues without requiring direct complex processing in the navigation system itself.
Solution Approach 2:
The system creates a virtual copy of the external spatial environment within the vehicle's audio field. By processing audio signals to emulate how sounds would naturally propagate in the real world based on distance and direction, the system creates a perceptual copy of the external spatial context, allowing users to perceive spatial relationships without directly observing the external environment.
3Reliability
If navigation prompts interrupt audio playback, then important navigation information is conveyed, but the user experience is disrupted and immersion is broken
Solution Approach 1:
The patent applies different audio processing qualities to different types of audio content. Navigation prompts receive spatial processing treatment to convey directional information, while music and other audio content maintain their original playback characteristics. This local application of spatial processing ensures that only the necessary navigation information is enhanced with spatial cues, preserving the overall user experience and audio immersion while reliably delivering critical navigation guidance.
Data Source
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AI summary
An audio signal associated with a navigation prompt is processed, based on the localization and distance information supplied by a navigation system, to generate an audio signal that, when played by an audio system in the vehicle, emulates the localization and distance information.