Sound stage controller for a near-field speaker-based audio system

摘要

Signals in an automobile audio system having at least two near-field speakers located close to an intended position of a listener's head are adjusted such that in a first mode, audio signals are distributed to the near-field speakers according to a first filter that causes the listener to perceive a wide soundstage, and in a second mode, the audio signals are distributed to the near-field speakers according to a second filter that causes the listener to perceive a narrow soundstage. A user input of a variable value is received and, in response, distribution of the audio signals is transitioned from the first mode to the second mode, the extent of the transition being variable based on the value of the user input.

主权项

1. A method of adjusting signals in an automobile audio system having at least two near-field speakers located close to an intended position of a listener's head; the method comprising:
for each of a set of designated positions other than the actual locations of the near-field speakers, determining a binaural filter that causes sound produced by each of the near-field speakers to have characteristics at the intended position of the listener's head of sound produced by a sound source located at the respective designated position, determining an up-mixing rule to generate at least three component channel signals from an input audio signal having at least two channels; determining a first set of weights for applying to the component channel signals at each of the designated positions to define a first sound stage; determining a second set of weights for applying to the component channel signals at each of the designated positions to define a second sound stage; and configuring the audio system to:
combine the first set of weights and the second set of weights to determine a combined set of weights, the relative contribution of the first set of weights and the second set of weights in the combined set of weights being determined by a variable user-input value,determine a mixed signal corresponding to a combination of the component channel signals according to the combined set of weights for each of the designated positions,filter each mixed signal using the corresponding binaural filter to generate a set of binaural output signals,sum the filtered binaural signals, andoutput the summed binaural signals using the near-field speakers.