Rendering Metadata for User Movement Audio Control
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Solution Overview
Problem
Current computer-mediated reality systems, such as VR, AR, and MR, face challenges in providing an immersive auditory experience due to the lack of controls that allow content creators to maintain a consistent and realistic audio rendering based on user movement, leading to reduced immersion and limited content availability.
Innovation Solution
The implementation of rendering metadata that enables or disables adaptations in audio rendering based on user movement, allowing for the selection and application of appropriate renderers to generate speaker feeds that align with the user's position and orientation, using techniques like six degrees of freedom rendering and binaural rendering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If audio rendering is dynamically adapted based on user movement, then auditory immersion is improved, but device complexity increases
Solution Approach 1:
The audio rendering system is segmented into distinct controllable components through rendering metadata that can independently enable or disable specific adaptations (e.g., distance rendering, Doppler effect, delay effects) based on user movement, allowing selective complexity management while maintaining immersion
Solution Approach 2:
The rendering system dynamically adapts audio output based on real-time user movement detection, adjusting rendering parameters such as distance attenuation, Doppler shifts, and time delays to maintain realistic auditory immersion as the user moves through the virtual environment
2Adaptability or versatility
If rendering metadata is obtained from bitstream, then content availability increases, but manufacturing precision requirements increase
Solution Approach 1:
The rendering metadata structure is designed as a universal control mechanism that can be embedded in audio bitstreams across different content formats and delivery platforms, enabling consistent rendering control while accommodating various content creation workflows and distribution channels
3Reliability
If renderer adaptations are enabled based on user movement, then auditory experience realism is improved, but processing requirements increase
Solution Approach 1:
The system applies rendering adaptations selectively to specific audio elements based on their importance and the user's movement characteristics, rather than uniformly processing all audio data, thereby reducing overall processing requirements while maintaining realism where it matters most
Data Source
AI summary
In general, techniques are described for rendering metadata to control user movement based audio rendering. A device comprising a memory and one or more processors may be configured to perform the techniques. The memory may be configured to store audio data representative of a soundfield. The one or more processors may be coupled to the memory, and configured to obtain rendering metadata indicative of controls for enabling or disabling adaptations, based on an indication of a movement of a user of the device, of a renderer used to render audio data representative of a soundfield, specify, in a bitstream representative of the audio data, the rendering metadata, and output the bitstream.