Spatial Audio Frame Translation for Video Sync
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Solution Overview
Problem
Existing audio-visual capture systems face challenges in synchronizing audio and video captures, leading to delocalization issues due to the physical difference in the location of audio and video capture devices, which affects the immersive experience by mismatching the audio and visual components.
Innovation Solution
The system processes audio information to translate it to a frame of reference coincident with the video capture device, using digital signal processing to adjust the audio signal components, allowing for active encoding and decoding to optimize spatial processing and listener experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the audio capture device is positioned at a different location than the video capture device, then the field of view of the camera is not blocked by the microphone, but the audio and visual components become mismatched causing delocalization issues
Solution Approach 1:
A processing system acts as an intermediary between the audio and video capture devices. It receives audio information from the audio capture device and video information from the video capture device, then processes and translates the audio information to align with the video perspective, effectively mediating the spatial mismatch between the two capture devices
Solution Approach 2:
The patent replaces the mechanical approach of physically positioning the audio capture device at the exact same location as the video capture device with a digital signal processing approach. Instead of relying on physical coincidence of capture devices, the system uses electronic processing to translate and align audio spatial information with the video perspective
2Manufacturing precision
If the audio capture device is positioned coincident with the video capture device, then audio-visual synchronization is improved, but the microphone blocks the camera's field of view
Solution Approach 1:
The processing system serves as an intermediary that allows the audio and video capture devices to be spatially separated while maintaining synchronization. It mediates between the two devices by translating audio information to match the video perspective, eliminating the need for physical coincidence of the capture devices
3Adaptability or versatility
If audio information is captured from a different spatial location than the video, then the capture system can avoid physical obstructions, but the audio requires complex processing to align with the video perspective
Solution Approach 1:
The processing system changes the parameters of the audio information by translating it from the audio capture device's spatial reference frame to the video capture device's spatial reference frame. This parameter transformation involves adjusting spatial coordinates, orientation, and other audio characteristics to align with the video perspective
Solution Approach 2:
The patent replaces complex mechanical and physical adjustments with digital signal processing techniques. Instead of physically repositioning capture devices or using complex acoustic routing, the system uses electronic translation of audio parameters to achieve spatial alignment, simplifying the overall system architecture
Data Source
AI summary
Systems and methods discussed herein can change a frame of reference for a first spatial audio signal. The first spatial audio signal can include signal components representing audio information from different depths or directions relative to an audio capture location associated with an audio capture source device with a first frame of reference relative to an environment Changing the frame of reference can include receiving a component of the first spatial audio signal, receiving information about a second frame of reference relative to the same environment, determining a difference between the first and second frames of reference, and, using the determined difference between the first and second frames of reference, determining a first filter to use to generate at least one component of a second spatial audio signal that is based on the first spatial audio signal and is referenced to the second frame of reference.