Multi-Channel Bass Management via Spectral Band Segmentation
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Solution Overview
Problem
Conventional audio systems inadequately manage bass frequencies, often overloading loudspeakers with very low frequency signals and lacking flexibility in speaker selection and placement, which affects the balance and separation of bass energy in multi-channel audio systems.
Innovation Solution
A method and system for processing audio signals by combining spectral bands of input channels to create multiple bass audio streams, each targeted to specific loudspeakers based on frequency range, including very low frequency streams routed to a single suited loudspeaker and low frequency streams maintained for directional radiation, maximizing system headroom and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional audio systems route all bass frequencies to all loudspeakers, then complete bass coverage is achieved, but loudspeakers become overloaded and system flexibility is reduced
Solution Approach 1:
The patent segments bass frequencies into multiple spectral bands (e.g., first spectral band and second spectral band with lower frequencies). Different loudspeaker subsets are assigned to different bands, allowing each speaker to handle only appropriate frequency ranges. This prevents overload while maintaining complete bass coverage across the system.
Solution Approach 2:
The patent applies local quality by assigning different frequency characteristics to different loudspeakers based on their capabilities. Each loudspeaker receives tailored bass signals appropriate to its frequency response characteristics, optimizing performance and preventing overload while maintaining overall system balance.
2Adaptability or versatility
If conventional audio systems use fixed bass management, then system simplicity is maintained, but adaptability to different speaker configurations is reduced
Solution Approach 1:
The patent implements dynamic bass management where the system can adaptively assign different loudspeakers to different spectral bands based on real-time conditions, speaker capabilities, and desired audio effects. This dynamic allocation provides flexibility in speaker selection and placement while maintaining manageable system operation through automated control.
3Reliability
If conventional audio systems combine all channels for bass output, then complete bass coverage is achieved, but directional separation and balance are lost
Solution Approach 1:
The patent segments both the frequency spectrum and channel groups. Different channel groups (e.g., front channels, rear channels, left hemisphere, right hemisphere) are combined separately for different spectral bands. This maintains directional information and balance while achieving complete bass coverage through coordinated output from multiple loudspeaker subsets.
Data Source
AI summary
A multi-channel audio system including first combining circuitry, for combining a first spectral band of a first plurality channels to provide a first bass audio signal stream; second combining circuitry, for combining the first spectral band of a second plurality channels to provide a second bass audio signal stream; and third combining circuitry, for combining a second spectral band, the second spectral band including lower frequencies than the first spectral band, of the first plurality of channels and the second plurality of channels to provide a third bass audio signal stream.