Front Speaker Virtual Surround Sound via Perspective Filtering
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Solution Overview
Problem
Conventional surround sound systems require additional rear speakers placed behind the listener, which is impractical due to extensive wiring needs and limited space issues, and not all listeners perceive virtual surround sound effectively.
Innovation Solution
The system processes audio signals to simulate rear surround sound effects using front speakers with perspective filters, allowing for the placement of speakers in front of the listener, reducing the need for extensive wiring and enabling surround sound in limited spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rear speakers are placed behind the listener to create surround sound, then the surround sound effect is improved, but the wiring complexity and space requirements increase
Solution Approach 1:
The patent combines the rear surround sound functionality with the front speaker system by processing rear audio channels through the front speakers using perspective filters. This merging eliminates the need for separate rear speakers and their associated wiring, while still providing the surround sound effect through virtual positioning techniques.
Solution Approach 2:
The patent creates a virtual copy of the rear surround sound effect by processing audio signals through perspective filters that simulate the acoustic characteristics of rear speakers. This virtual copying allows the front speakers to reproduce rear sound fields without physical rear speakers, reducing wiring complexity while maintaining the surround sound experience.
2Reliability
If rear speakers are placed behind the listener to create surround sound, then the surround sound effect is improved, but the installation space requirements increase
Solution Approach 1:
The patent merges the rear surround sound functionality into the front speaker placement by using perspective filtering techniques. This allows the system to provide rear surround effects using only front speakers, eliminating the need for additional installation space behind the listener while maintaining the surround sound experience.
Solution Approach 2:
The patent transitions from a physical spatial arrangement (requiring rear speakers in physical space behind the listener) to a signal processing dimension (using perspective filters to create virtual rear sound fields). This dimensional change allows surround sound to be achieved without increasing physical installation space requirements.
3Reliability
If conventional surround sound systems are used with rear speakers, then the surround sound effect is achieved, but the system complexity and installation difficulty increase
Solution Approach 1:
The patent combines multiple functions (front speaker output and rear surround sound) into a single speaker system using perspective filter processing. This reduces the number of components and installation steps required, making the system easier to install and operate while maintaining surround sound effectiveness.
Data Source
AI summary
A method for processing audio signals can include receiving left and right front audio signals and left and right rear audio signals, where the left and right rear audio signals. In addition, the method can include applying at least one front perspective filter to each of the left and right front audio signals to yield filtered left and right front output signals, where the left and right front output signals each drive a front speaker. Moreover, the method can include applying at least one rear perspective filter to each of the left and right rear audio signals to yield left and right rear output signals, where the left and right rear output signals each drive a rear speaker to simulate a rear surround sound effect when positioned in front of a listener.