Spatial Audio Layer Selection for Bandwidth-Adaptive Teleconferencing
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Solution Overview
Problem
Existing teleconferencing systems lack the ability to selectively choose layers of spatially layered encoded audio signals in a manner that provides a continuous listening experience, varies soundfield and monophonic layers over time, and adapts to endpoint capabilities and audio content characteristics.
Innovation Solution
A method and system for selecting layers of spatially layered encoded audio signals, involving downstream capability-driven, perceptually-driven, and endpoint-driven layer selection, which determines the appropriate layers to transmit and process based on endpoint capabilities and audio content analysis, ensuring a continuous and efficient audio experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all layers of spatially layered encoded audio are transmitted to ensure complete audio information, then audio quality is improved, but bandwidth consumption increases
Solution Approach 1:
The audio signal is divided into multiple layers (base layer and enhancement layers), where each layer contributes differently to audio quality. The base layer provides essential audio information, while enhancement layers provide additional spatial and spectral details. This segmentation allows selective transmission of layers based on available bandwidth and endpoint capabilities.
Solution Approach 2:
The system dynamically changes parameters such as the number of transmitted layers, layer selection criteria, and spatial resolution based on available bandwidth, endpoint capabilities, and audio content characteristics. This allows optimization of the trade-off between audio quality and bandwidth consumption in real-time.
2Productivity
If layer selection is performed to reduce bandwidth usage, then bandwidth efficiency is improved, but listening experience continuity deteriorates
Solution Approach 1:
The layer selection process is dynamic rather than static. The system continuously monitors bandwidth availability, endpoint capabilities, and audio content characteristics, adjusting the selected layers in real-time to maintain listening experience continuity while optimizing bandwidth efficiency.
Solution Approach 2:
The system implements feedback mechanisms where endpoints report their capabilities and received audio quality, and the system adjusts layer selection based on this feedback. This ensures that bandwidth efficiency is optimized while maintaining continuous and satisfactory listening experience.
3Ease of operation
If fixed layer selection is used to simplify system operation, then system complexity is reduced, but adaptability to different endpoints and content deteriorates
Solution Approach 1:
The system performs self-service by automatically analyzing endpoint capabilities, available bandwidth, and audio content characteristics to make intelligent layer selection decisions. This eliminates the need for complex manual configuration while maintaining high adaptability to different endpoints and content types.
Solution Approach 2:
The system dynamically changes operational parameters such as the number of transmitted layers, layer selection criteria, and spatial resolution based on endpoint capabilities and audio content characteristics. This allows the system to adapt to different scenarios automatically without increasing operational complexity for users.
4Measurement precision
If spatial layers are transmitted to provide immersive audio experience, then audio quality is improved, but device complexity increases
Solution Approach 1:
The spatial audio signal is segmented into multiple layers with different levels of spatial and spectral detail. The base layer provides essential audio information with minimal processing, while enhancement layers add spatial immersion. This segmentation allows endpoints to select appropriate layers based on their processing capabilities, balancing audio quality with device complexity.
Data Source
AI summary
In some embodiments, a method for selecting at least one layer of a spatially layered, encoded audio signal. Typical embodiments are teleconferencing methods in which at least one of a set of nodes (endpoints, each of which is a telephone system, and optionally also a server) is configured to perform audio coding in response to soundfield audio data to generate spatially layered encoded audio including any of a number of different subsets of a set of layers, the set of layers including at least one monophonic layer, at least one soundfield layer, and optionally also at least one metadata layer comprising metadata indicative of at least one processing operation to be performed on the encoded audio. Other aspects are systems configured (e.g., programmed) to perform any embodiment of the method, and computer readable media which store code for implementing any embodiment of the method or steps thereof.