Patent ID: 8538042
Filing Date: 2013-09-17
Classification: H03G,H04R

Abstract:
1. A method of increasing perceived loudness of an audio signal, the method comprising: receiving an electronic audio signal; processing the electronic audio signal with a frequency suppressor using one or more processors, the frequency suppressor configured to filter one or both of low frequencies and high frequencies of the electronic audio signal to produce a filtered audio signal, such that the filtered audio signal has increased headroom; estimating a loudness of the filtered audio signal by processing the filtered audio signal with one or more loudness filters using a loudness weighting curve to produce an estimated loudness of the audio signal; and computing one or more gains to be applied to the filtered audio signal using at least a difference between the estimated loudness and a reference level loudness; and increasing loudness of the filtered audio signal by applying the one or more gains to the filtered audio signal.