Vehicle HRTF Capture Using Exterior and Interior Cameras
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for determining and recording the head-related transfer function (HRTF) in vehicles are inefficient and uncomfortable, as they require complex measurements and camera setups that often fail to accurately capture the relevant anatomical features, necessitating time-consuming adjustments from the user.
Innovation Solution
A method that uses cameras, both inside and outside the vehicle, to record anatomical characteristics of the person approaching and entering the vehicle, allowing for early detection and precise calculation of the HRTF, even in varying lighting conditions, with the option to use near-infrared light for improved visibility and minimal hardware requirements, enabling efficient storage and real-time processing for personalized 3D audio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cameras are arranged inside the vehicle to capture the person's anatomy, then the HRTF can be determined, but the cameras often cannot reliably and accurately capture all relevant areas of the person's head
Solution Approach 1:
The system performs preliminary capture of the person's anatomical features using exterior cameras before the person enters the vehicle. This allows the HRTF determination process to be initiated early, and the person can be detected from different angles and in different lighting scenarios before interior cameras need to take over, improving overall capture reliability
Solution Approach 2:
The patent introduces an exterior camera system as an intermediary component that bridges the gap between initial detection and interior HRTF capture. These cameras positioned outside the vehicle capture the person's approach and provide initial anatomical data, supplementing the interior camera system and improving overall measurement precision
2Measurement precision
If the person is asked to move and rotate their head to enable camera capture, then complete anatomical data can be obtained, but this is comparatively time-consuming and perceived as a loss of comfort
Solution Approach 1:
The system captures the person's anatomical features in advance using exterior cameras while the person is simply approaching the vehicle, before any head movement requests are made. This preliminary capture obtains baseline data without requiring the person to spend time moving or rotating their head
Solution Approach 2:
The exterior camera system automatically captures the person's anatomical features during the natural approach to the vehicle, without requiring the person to perform any specific actions. The system serves itself by utilizing the person's natural movement toward the vehicle to obtain the required data
3Measurement precision
If cameras are arranged to capture the person from multiple angles, then more complete anatomical data can be obtained, but this requires more cameras and increases system complexity
Solution Approach 1:
The exterior cameras serve multiple functions: they capture the person's approach, provide initial anatomical data for HRTF determination, and enable detection from different angles. This multi-functionality reduces the need for dedicated capture cameras, as the same exterior cameras perform both security/detection and HRTF measurement functions
Solution Approach 2:
The exterior cameras perform preliminary capture of anatomical features before the person enters the vehicle, establishing a baseline that reduces the burden on interior cameras. This sequential approach allows fewer total cameras to achieve complete anatomical data by dividing the capture task across time and space
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and accurate determination of the HRTF, allowing for the generation of high-quality 3D audio using just two speakers, improving the audio experience while reducing the need for extensive hardware and user intervention, with the ability to update the system based on anatomical changes.
Implementation Method 1
a first camera (4) in the B-pillar of the vehicle (1) is used to record the anatomy of the approaching person (2)
Implementation Method 2
with the option to use near-infrared light for improved visibility
Data Source
Figure 1~2
AI summary
The invention relates to a method for calculating the head related transfer function (HRTF) for at least one person (2) using a vehicle (1), wherein the head related transfer function (HRTF) is calculated on the basis of features of the person (2) captured using cameras (4, 6, 7). The invention is characterised in that the features are captured temporally at least partially one after another by multiple cameras (4, 6, 7), wherein at least one of the cameras (4) is arranged such that it captures the person (2) when they are approaching and opening the vehicle (1) in the area outside the vehicle (1). (Figure 1)