BASS MANAGEMENT FOR OBJECT-BASED AUDIO

摘要

A bass management system and method for mitigating bass management errors by using explicit information available in the object audio rendering process and deriving the correct subwoofer contribution for each audio object. Embodiments of the bass management system and method are used to maintain the correct balance of the bass reproduced by the subwoofer relative to the sound coming out of the other speakers. The system and method are useful for a variety of different speaker configurations, including speaker configurations having different speaker sub-zones. Power-normalized gain coefficients for each speaker are combined and the power of the combined gain coefficients is computed and used to obtain a power-preserving subwoofer contribution coefficient. This subwoofer contribution coefficient is applied to the bass portion of the audio signal and audio objects to determine the contribution of a particular subwoofer.

主权项

1. A method for processing an audio signal, comprising:
inputting from a renderer power-normalized speaker gain coefficients for the audio signal, audio signal containing an audio object and associated rendering information; combining the gain coefficients and computing power of the combined gain coefficients to obtain a power-preserving subwoofer contribution coefficient that preserves the power of the combined gain coefficients; applying the subwoofer contribution coefficient to a subwoofer audio signal to obtain a gain-modified subwoofer audio signal; and playing back in an audio environment the gain-modified subwoofer audio signal through a subwoofer to ensure that an amount of bass signal is applied to the subwoofer avoids bass management error.