Free-Viewpoint Audio Object Positioning for Creator-Intended Emphasis
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Solution Overview
Problem
Existing content reproduction systems fail to adequately convey the intended emphasis of objects in a free viewpoint space, such as highlighting specific players or instruments, as the physical relationship between the listener and objects does not sufficiently capture the artistic intent of the content creator.
Innovation Solution
An information processing apparatus and method that acquires listener position information and object position information from multiple reference viewpoints, calculating the object's position at the listener's viewpoint based on these positions, allowing for dynamic object arrangement and gain adjustment to reflect the content creator's intent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If object positions are fixed based on absolute coordinate system and physical relationship between listener and object, then the spatial arrangement is stable and reproducible, but the content creator's artistic intent and object emphasis cannot be adequately conveyed
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing object positions at multiple reference viewpoints before actual content reproduction. This allows the system to quickly retrieve and interpolate appropriate object positions based on the listener's current viewpoint, rather than calculating from scratch each time. The pre-computed reference data enables both spatial stability and artistic intent preservation.
Solution Approach 2:
The patent implements dynamics by transitioning from fixed absolute coordinate positions to dynamic positions that adapt based on the listener's viewpoint. Object positions are no longer static but are interpolated from multiple reference viewpoints to create a dynamic arrangement that maintains artistic intent while adapting to different listening positions.
2Loss of information
If object positions are adjusted to emphasize specific objects based on listener position, then the artistic experience is enhanced, but the calculation complexity increases beyond simple distance-based gain
Solution Approach 1:
The patent applies segmentation by dividing the continuous space into multiple discrete reference viewpoints. Instead of handling all possible listener positions simultaneously, the system segments the viewpoint space into reference points where object positions are pre-calculated. This segmentation simplifies the overall calculation complexity while maintaining accuracy through interpolation between segments.
Solution Approach 2:
The patent uses interpolation as an intermediary mechanism to bridge the gap between discrete reference viewpoints and continuous listener positions. Rather than directly calculating object positions for every possible listener position, the system uses interpolation to smoothly transition between pre-computed reference positions, reducing calculation complexity while preserving artistic intent.
3Measurement precision
If multiple reference viewpoints are used to calculate object positions, then the content reproduction accuracy is improved, but the data processing and storage requirements increase
Solution Approach 1:
The patent applies partial action by using only the necessary number of reference viewpoints required to achieve acceptable accuracy, rather than computing positions for all possible listener positions. This selective approach provides sufficient precision while avoiding excessive data storage requirements. The system uses enough reference points to capture artistic intent without over-sampling.
Data Source
AI summary
The present technology relates to an information processing apparatus and an information processing method, and a program capable of realizing content reproduction based on an intention of a content creator. An information processing apparatus includes: a listener position information acquisition unit that acquires listener position information of a viewpoint of a listener; a reference viewpoint information acquisition unit that acquires position information of a first reference viewpoint and object position information of an object at the first reference viewpoint, and position information of a second reference viewpoint and object position information of the object at the second reference viewpoint; and an object position calculation unit that calculates position information of the object at the viewpoint of the listener on the basis of the listener position information, the position information of the first reference viewpoint and the object position information at the first reference viewpoint, and the position information of the second reference viewpoint and the object position information at the second reference viewpoint. The present technology can be applied to content reproduction systems.