Object-Based Audio Downmix Decoding With Channel Gain Modification
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Solution Overview
Problem
Existing audio encoding and decoding techniques struggle to efficiently process object-based audio signals across various environments, as they often require complex decoding and rendering operations, especially when dealing with multiple object signals and channels.
Innovation Solution
The proposed method involves generating a downmix signal by downmixing object signals, extracting object-related information, and creating object-based side information that includes gain information for modifying channel signals on a channel-by-channel basis, allowing for adaptive decoding and reduced complexity in processing multiple object signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If object-based audio encoding is performed by treating object signals as entities to be coded with full decoding and rendering operations, then audio quality is maintained, but processing complexity increases significantly
Solution Approach 1:
The patent extracts only the essential gain information from object-based side information rather than performing complete decoding and rendering of object signals. This selective extraction of necessary parameters (gain values for channel-by-channel modification) reduces processing complexity while maintaining sufficient audio quality for the intended application
Solution Approach 2:
The patent applies partial action by performing only the necessary decoding steps to extract gain information, rather than completing the full object-based audio decoding and rendering pipeline. This partial processing approach achieves the goal of modifying downmix channel signals without the overhead of complete object signal reconstruction
2Manufacturing precision
If complex decoding and rendering operations are performed for object-based audio signals, then audio quality is preserved, but computational complexity and processing time increase
Solution Approach 1:
The patent extracts only the gain information parameter from object-based side information, avoiding the computationally intensive steps of complete object signal decoding and rendering. This extraction approach maintains processing efficiency while obtaining sufficient information for modifying downmix channel signals on a channel-by-channel basis
Solution Approach 2:
The patent performs partial decoding to extract only the necessary gain information rather than completing the full decoding and rendering pipeline. This partial action approach improves processing efficiency by eliminating unnecessary computational steps while still achieving the objective of audio signal modification
3Manufacturing precision
If object signals are downmixed into fewer channel signals with full side information transmission, then audio quality is maintained, but data transmission requirements increase
Solution Approach 1:
The patent extracts only the essential gain information from object-based side information rather than transmitting and processing complete side information sets. This selective extraction reduces the quantity of data that needs to be transmitted and processed while maintaining sufficient audio quality for the application
Data Source
AI summary
An audio decoding method and apparatus and an audio encoding method and apparatus which can efficiently process object-based audio signals are provided. The audio decoding method includes receiving a downmix signal and object-based side information, the downmix signal comprising at least two downmix channel signals; extracting gain information from the object-based side information and generating modification information for modifying the downmix channel signals on a channel-by-channel basis based on the gain information; and modifying the downmix channel signals by applying the modification information to the downmix channel signals.