Audio Object Remapping with Offset Angle Correction
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Solution Overview
Problem
The existing Screen-Related Object Element Remapping technique in the ISO/IEC 23008-3 '3D Audio' standard fails to perform appropriate remapping when the central position of the reference screen is not aligned with the user, leading to distortion in positional relations among audio objects outside the reproduction screen, especially during omnidirectional or zoomed image reproduction.
Innovation Solution
An information processing apparatus and method that corrects the object position information and reference screen information by calculating an offset angle to align the central position of the reference screen with the reference position, ensuring accurate remapping of audio objects based on the reproduction screen information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the existing Screen-Related Object Element Remapping technique is used, then audio objects can be remapped based on reference screen information, but distortion occurs in positional relations among audio objects outside the reproduction screen when the reference screen central position is not aligned with the user
Solution Approach 1:
The patent applies preliminary action by calculating and storing offset angles between the reference screen central position and the reproduction screen central position before remapping is performed. This pre-calculated offset information is then used to correct the remapping process, preventing positional distortion of audio objects outside the reproduction screen. The offset angles are computed in advance based on screen geometry and positioning information, allowing the system to compensate for misalignment issues during the actual audio reproduction phase.
2Adaptability or versatility
If omnidirectional image or zoomed image reproduction is performed, then the reference screen central position cannot always be placed in front of the user, but the existing remapping technique assumes central position alignment
Solution Approach 1:
The patent implements dynamics by making the remapping process adaptive to different reproduction scenarios. The system dynamically calculates offset angles based on the actual positioning of the reference screen and reproduction screen, allowing the central positions to differ while maintaining accurate audio object positioning. This dynamic adjustment enables the system to handle omnidirectional images, zoomed views, and other varied reproduction scenarios without assuming fixed central position alignment, thus resolving the contradiction between versatility and precision.
Data Source
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AI summary
The present technique relates to an information processing apparatus, an information processing method, and a program capable of performing appropriate remapping. An offset angle calculation section calculates an offset amount of a position of a reference screen from a reference position present in a front direction of a user, and a position information correction section corrects a position of an audio object referred with the reference position, in conformity with the position of the reference screen on the basis of the offset amount. Furthermore, an object remapping section remaps the position of the audio object in conformity with a position of a reproduction screen on the basis of the corrected position of the audio object. The present technique can be applied to an information processing apparatus.