Method and device for improved sound field rendering accuracy within a preferred listening area

Abstract

The invention relates to a method and a device for sound field reproduction from a first audio input signal (1) using a plurality of loudspeakers (2) aiming at synthesizing a sound field within a preferred listening area (6) in which none of the loudspeakers (2) are located, said being described as emanating from a virtual source (5). The method further comprises steps of calculating a plurality of positioning filters (7) using virtual source description data (8) and loudspeaker description data (9) according to a sound field reproduction technique, and modifying the first audio input signal (1) using the positioning filter coefficients (7) to form second audio input signals (3). Therefore, a loudspeaker ranking (11) of the importance of each loudspeaker (2) for the synthesis of the soundfield within the preferred listening area (6) is defined. Then, second audio input signals (6) are modified according to the loudspeaker ranking (11) to form third audio input signals (12). Finally, the loudspeakers (2) are fed with the third audio input signals (12) which synthesize a sound field (3).

Description

technical field [0001] The present invention relates to a method and apparatus for sound field reproduction (reproduction) from a first audio input signal using a plurality of speakers intended to synthesize a sound field in an optimum listening area in which no speakers are placed, the sound field being Described as emanating from a virtual source, the method comprises the steps of: calculating localized filter coefficients using virtual source description data and loudspeaker description data according to a sound field reproduction technique derived from surface integrals; and applying the localized filter coefficients to filter The first audio input signal to form a second audio input signal. Background technique [0002] Acoustic field reproduction refers to the synthesis of physical properties of an acoustic wave field within an extended spatial portion. Such a framework is able to escape the well-known limitations of stereo-based sound reproduction techniques with res...

AI Technical Summary

Problems solved by technology

However, there may be positions in the room where the audience is never there because of the presence of furniture or simply because their task or situation does not require it

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