Object-Based Audio Decoding by Merging Same-Position Sound Objects
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Solution Overview
Problem
Existing audio encoding and decoding techniques face challenges in efficiently processing 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 an audio decoding apparatus that combines first and second object-encoded audio signals to generate a third audio signal by using third object energy information, which is derived from the first and second object energy information, and incorporates a demultiplexer to extract downmix signals and side information, and a multi-pointer controller to generate third object energy information and side information for efficient decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple object signals are decoded and rendered separately, then the audio quality and spatial accuracy are improved, but the decoding complexity and processing time increase
Solution Approach 1:
The patent merges multiple object signals that are allocated to the same position into a single combined sound source for decoding and rendering. This reduces the number of independent decoding operations required while maintaining the perceived audio quality and spatial accuracy, as the merged signal preserves the essential acoustic characteristics of the original object signals.
Solution Approach 2:
The patent creates a universal decoding approach where multiple object signals can be treated as a single entity when they share the same spatial position. This multi-functional approach allows the decoder to adaptively switch between processing individual objects and merging objects based on their spatial allocation, optimizing both quality and complexity for different scenarios.
2Measurement precision
If multiple object signals are processed independently, then the spatial positioning accuracy is improved, but the processing time and computational resources increase
Solution Approach 1:
The patent combines multiple object signals allocated to the same spatial position into a single processing unit, reducing the total number of processing operations required. This merging maintains spatial positioning accuracy because the combined signal is rendered at the correct spatial location, while significantly reducing processing time by eliminating redundant operations.
Solution Approach 2:
The patent segments the processing workflow into two stages: first identifying and grouping objects by their spatial positions, then processing each group as a unit. This segmentation approach preserves spatial accuracy by maintaining position-based grouping while reducing overall processing time through batch operations.
3Adaptability or versatility
If object-based audio encoding is implemented, then the flexibility and adaptability to various environments are improved, but the encoding and decoding complexity increase
Solution Approach 1:
The patent reduces encoding complexity by merging objects with identical spatial positions into single encoding units. This approach maintains the flexibility and adaptability of object-based audio systems to various playback environments, as the merged objects can still be independently controlled and rendered according to their spatial allocation, while reducing the computational burden of encoding and decoding operations.
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 first and second audio signals, which are object-encoded; generating third object energy information based on first object energy information included in the first audio signal and second object energy information included in the second audio signal; and generating a third audio signal by combining the first and second object signals and the third object energy information.