Multi-Channel Audio Reproduction With Modular Listening Levels
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Solution Overview
Problem
Conventional three-dimensional audio systems require complex loudspeaker configurations and numerous output signals, making them inaccessible and costly for everyday use in home environments or while traveling, as they are typically reserved for large spaces like cinemas or music studios.
Innovation Solution
A method that generates only one lower and one upper listening level, using a maximum of six output signals, allowing for a minimalistic three-dimensional audio reproduction that can be expanded modularly, using software on a signal processor to decode input channels and create linear and parallel channels for mono and stereo signals, enabling three-dimensional audio experience with fewer loudspeakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex loudspeaker configuration with many output signals is used to generate three-dimensional sound space, then the audio reproduction quality and three-dimensional sound experience are improved, but the device complexity and cost increase significantly
Solution Approach 1:
The patent segments the audio signal processing into distinct functional blocks: decoding unit for parsing input signals, processing unit for generating spatial channels, and mixing unit for combining channels. This segmentation allows complex three-dimensional audio processing to be achieved through modular, manageable components rather than a monolithic complex system.
Solution Approach 2:
The processing unit performs multiple functions: it decodes input signals, generates spatial channels (left spatial channel RL=L−R, right spatial channel RR=R−L, and center channel C=L+R), and creates both lower and upper listening levels. This multi-functionality reduces the need for separate dedicated components for each function.
2Reliability
If numerous loudspeakers and output signals are deployed to achieve three-dimensional audio reproduction, then the sound experience is enhanced, but the ease of operation and accessibility for everyday use deteriorates
Solution Approach 1:
The system dynamically adapts the audio processing based on the capabilities of the output device. It can operate with as few as two loudspeakers for basic stereo reproduction or expand to support more loudspeakers for enhanced three-dimensional experience, making the system flexible and accessible for various everyday scenarios from mobile devices to home theater systems.
Solution Approach 2:
The patent generates different types of output signals with specific characteristics for different listening levels: linear channels for lower listening level and parallel channels for upper listening level. Each channel type is optimized for its specific purpose, allowing the system to provide appropriate audio quality for each output configuration without requiring maximum complexity everywhere.
3Ease of operation
If a maximum of six output signals with no more than two for lower listening level and no more than four for upper listening level are generated, then the ease of operation and simplicity are improved, but the audio reproduction quality and three-dimensional sound space may be compromised
Solution Approach 1:
The system implements partial three-dimensional audio reproduction by generating only one lower listening level and one upper listening level with a maximum of six output signals. This partial implementation provides sufficient three-dimensional experience for everyday use while maintaining system simplicity, rather than attempting to provide complete high-fidelity three-dimensional reproduction that would require many more channels.
Solution Approach 2:
The patent adds the vertical dimension by generating upper listening level channels in addition to the conventional lower listening level. This dimensional addition creates three-dimensional sound space without requiring a proportional increase in the number of output signals, as the vertical layering is achieved through signal processing rather than simply adding more horizontal speakers.
Data Source
AI summary
The invention relates to a method for reproducing audio in a multi-channel sound system including two input signals (L and R), wherein output signals are generated for different sound perception levels. In order to develop said method in such a way that audio can be reproduced within a larger range of applications in a multi-channel sound system, according to the invention, only a lower sound perception level (7) and a higher sound perception level (6) are generated, and a maximum of six output signals are generated, a maximum of two output signals being allocated to the lower sound perception level (7) and a maximum of four output signals being allocated to the higher sound perception level (6).