Apparatus and method for generating output signals based on an audio source signal, sound reproduction system and loudspeaker signal

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This invention describes an apparatus, method, and system for generating multiple output audio signals with spatial reverberation effects based on at least one audio source. The core approach uses a sophisticated delay network with feedback and per-path filtering—allowing the simulation of detailed early reflections and late reverberation in virtual spaces. The system can render sound for diverse multi-loudspeaker setups, maintaining spatial cues and efficient computation regardless of the number of sound sources.

Use CasesContent extracted from patent full text and abstract with AI.

• High-fidelity home theater systems with advanced surround sound and realism.
• Professional audio production and mixing studios for immersive audio rendering.
• Virtual reality (VR) and augmented reality (AR) applications to generate convincing 3D audio environments.
• Museums, planetariums, or exhibition spaces implementing dynamic multi-speaker soundscapes.
• Gaming systems creating immersive and adaptive sound fields for players.
• Cinema sound systems with complex acoustic requirements and dynamic room configurations.
• Automotive entertainment systems providing realistic in-cabin sound environments.

BenefitsContent extracted from patent full text and abstract with AI.

• Enables scalable, flexible multichannel spatial reverberation with low computational cost (suitable for many speakers and/or sound sources).
• Maintains accurate spatial audio cues (direction, early and late reflections) for immersive realism.
• Easily adapts to arbitrary loudspeaker arrangements and changing room configurations.
• Supports direction-dependent reverberation and equalization, allowing detailed emulation of virtual spaces (even with multiple sub-rooms).
• Reduced memory and processing requirements compared to prior art, especially for high-channel-count systems.
• Seamlessly integrates early reflections and late reverberation, avoiding artifacts and improving audio quality.
• Applicable in both hardware and software, including real-time processing and in various consumer/professional devices.

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Patent Abstract

An apparatus for generating a first multitude of output signals based on at least one audio source signal comprising a delay network and a feedback processor. The delay network comprises a second multitude of delay paths, each delay path having a delay line and an attenuation filter. Each delay line is configured for delaying delay line input signals and for combining the at least one audio source signal and a reverberated audio signal to obtain a combined signal, wherein the attenuation filter of a delay path is configured for filtering the combined signal from the delay line of the delay path to obtain an output signal. The first multitude of output signals comprises the output signal. The feedback processor is configured for reverberating the first multitude of output signals to obtain a third multitude of the reverberated audio signals comprising the reverberated audio signal.