Invention Grant
- Patent Title: Sound field control in multiple listening regions
- Patent Title (中): 在多个聆听区域进行声场控制
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Application No.: US12453958Application Date: 2009-05-28
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Publication No.: US08213637B2Publication Date: 2012-07-03
- Inventor: Lars-Johan Brännmark , Mikael Sternad , Mathias Johansson
- Applicant: Lars-Johan Brännmark , Mikael Sternad , Mathias Johansson
- Applicant Address: SE Uppsala
- Assignee: Dirac Research AB
- Current Assignee: Dirac Research AB
- Current Assignee Address: SE Uppsala
- Agency: Young & Thompson
- Main IPC: H03G5/00
- IPC: H03G5/00

Abstract:
A scheme to design an audio precompensation controller for a multichannel audio system, with a prescribed number N of loudspeakers in prescribed positions so that listeners positioned in any of P>1 spatially extended listening regions should be given the illusion of being in another acoustic environment that has L sound sources located at prescribed positions in a prescribed room acoustics. The method provides a unified joint solution to the problems of equalizer design, crossover design, delay and level calibration, sum-response optimization and up-mixing. A multi-input multi-output audio precompensation controller is designed for an associated sound generating system including a limited number of loudspeaker inputs for emulating a number of virtual sound sources. Method includes: estimating, for each loudspeaker input signals, an impulse response at each of a set of measurement positions that cover the P listening regions; specifying a target impulse response (target stages) for each virtual sound source at each measurement position; and determining adjustable filter parameters of the audio precompensation controller so that a criterion function is optimized.
Public/Granted literature
- US20100305725A1 Sound field control in multiple listening regions Public/Granted day:2010-12-02
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