Scene Audio Encoding Scheme Selection for HOA Bit Rate Control
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Solution Overview
Problem
The high data amount and low encoding performance of higher-order ambisonics (HOA) signals pose challenges in transmission and storage, limiting the flexibility and efficiency of three-dimensional audio encoding.
Innovation Solution
A scene audio encoding method that selects an encoding scheme combination from a pre-established set based on scene information, combining different encoding schemes for channels to balance bit rate and quality, adapting to varying channel quantities and encoding rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the HOA order quantity is increased to record more detailed sound scene information, then the information quality is improved, but the data amount increases accordingly, creating challenges in transmission and storage
Solution Approach 1:
The patent segments the HOA signal processing into multiple independent encoding schemes that can be applied to different channels or signal components separately. This allows selective application of encoding strategies to manage data volume while preserving essential spatial audio information quality.
Solution Approach 2:
The patent employs multiple encoding schemes with different parameter configurations (such as different transform types, bit allocation strategies, or spatial processing methods) to optimize the balance between information retention and data reduction for HOA signals at various orders.
2Device complexity
If a single encoding scheme is used for all channels, then the device complexity is reduced, but the encoding performance is limited
Solution Approach 1:
The patent introduces dynamic selection of encoding schemes based on scene characteristics, signal properties, or channel-specific features. This allows the system to adaptively choose optimal encoding strategies for different channels or audio scenarios, improving performance without requiring permanently complex fixed architecture.
Solution Approach 2:
The patent designs a unified encoding framework that can accommodate multiple encoding schemes through a common interface and control mechanism. This multi-functional approach allows a single system to handle diverse encoding requirements across different channels while maintaining overall system coherence and manageable complexity.
3Adaptability or versatility
If more encoding schemes are established to adapt to different scenes, then the adaptability is improved, but the time consumed to determine the optimal encoding scheme increases
Solution Approach 1:
The patent pre-establishes multiple encoding schemes with defined characteristics and applicability conditions before actual audio encoding. This preliminary preparation allows the system to quickly match pre-defined schemes to detected scene types without performing complex real-time optimization, significantly reducing selection time while maintaining adaptability.
Solution Approach 2:
The patent employs lightweight scene classification and encoding scheme selection mechanisms that require minimal computational resources. By using simple, fast scene detection methods rather than complex real-time analysis, the system achieves rapid encoding scheme selection suitable for real-time or near-real-time audio processing applications.
Data Source
AI summary
A scene audio encoding method includes obtaining a scene audio signal. The scene audio encoding method further includes determining an encoding scheme combination corresponding to the scene audio signal from an encoding scheme set, where the encoding scheme set includes a plurality of encoding scheme combinations. The scene audio encoding method further includes encoding the scene audio signal based on the encoding scheme combination corresponding to the scene audio signal.