Vertical Height Loudspeaker Signal Processing for Audio Reproduction
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Solution Overview
Problem
Conventional multichannel audio systems fail to effectively enhance audio reproduction by not utilizing the vertical height loudspeakers above the conventional front loudspeakers, leading to incomplete sound distribution and potential cancellation of out-of-phase signals at specific listening positions.
Innovation Solution
The method involves extracting out-of-phase sound information from side or rear audio channels and applying it to vertical height loudspeakers positioned above the front loudspeakers, using either passive or active matrices to derive and weight signals for left and right vertical height loudspeakers, ensuring in-phase signals to minimize cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If out-of-phase sound information is extracted and applied to vertical height loudspeakers, then audio reproduction quality is enhanced, but device complexity increases
Solution Approach 1:
The patent extracts out-of-phase sound information from existing surround channels and applies it to vertical height loudspeakers. This extraction principle allows the system to utilize unused audio components without adding new sound sources, thereby enhancing audio reproduction quality while avoiding the need for additional complex hardware
Solution Approach 2:
The patent makes existing surround channels serve multiple functions: they provide both traditional surround sound and contribute to vertical height audio reproduction. By processing the same channel signals to extract out-of-phase information, the system achieves multi-functionality without requiring dedicated vertical channels, thus reducing overall device complexity
2Measurement precision
If out-of-phase signals are applied to vertical height loudspeakers, then immersive audio experience is improved, but signal cancellation occurs at specific listening positions
Solution Approach 1:
The patent applies out-of-phase information to vertical height loudspeakers positioned above front speakers. By inverting the phase relationship and utilizing the vertical dimension, the system creates a different spatial distribution pattern that reduces cancellation issues at specific listening positions while maintaining immersive audio experience
3Area of stationary object
If vertical height loudspeakers are added to the system, then sound distribution is enhanced, but system complexity and cost increase
Solution Approach 1:
The patent adds vertical height loudspeakers positioned above the front loudspeakers, introducing a vertical dimension to the audio system. This dimensional change expands sound distribution coverage without requiring proportional increases in system complexity, as the vertical speakers utilize processed signals from existing surround channels rather than requiring independent signal sources
Data Source
AI summary
This invention relates to the field of multichannel audio. More particularly, the invention relates to a method for the provision of audio channels suitable for application to loudspeakers located above conventional front loudspeakers.