System and method for adjusting the clarity of audio output

Abstract

Adjusting the clarity of audio output in a changing environment. [Solution] A method for adjusting the clarity of an audio output in a changing environment, comprising: receiving a content signal; applying a customized gain to the content signal; and outputting the content signal having the customized gain to at least one speaker for conversion to an acoustic signal, wherein the customized gain is applied per frequency bin such that smaller amplitude frequencies are enhanced to larger amplitude frequencies, and the clarity of the acoustic signal is set to an approximately desired level, and the customized gain is determined according to at least one of the gain applied to the content signal, the bandwidth of the content signal, and the content type encoded by the content signal.

Claims

[Claim 1] A method for adjusting the clarity of audio output in a changing environment, Receiving content signals and Applying a customized gain to the content signal, A method comprising outputting the content signal having the customized gain to at least one speaker for conversion to an acoustic signal, wherein the customized gain is applied per frequency bin such that smaller amplitude frequencies are enhanced to larger amplitude frequencies and the intelligibility of the acoustic signal is set to an substantially desired level, and the customized gain is determined according to at least one of the gain applied to the content signal, the bandwidth of the content signal, and the content type encoded by the content signal. [Claim 2] The customized gain is based on dynamic range compression, according to the method of claim 1. [Claim 3] The method of claim 2, wherein the customized gain is further based on equalization. [Claim 4] The method according to claim 3, wherein the equalization is a spectral gradient. [Claim 5] The method according to claim 1, wherein the gain applied to the content signal is set according to volume control. [Claim 6] The method according to claim 1, wherein the audio output is generated inside the vehicle cabin, and the gain is set at least in part according to the road noise inside the vehicle cabin and according to volume control. [Claim 7] The method according to claim 6, wherein the gain, which is set according to the road noise inside the vehicle cabin, consists of a set of frequency-dependent gain adjustments. [Claim 8] The method according to claim 2, wherein the dynamic range compression is performed only within the bandwidth of the signal. [Claim 9] The method according to claim 1, wherein the content type is one of music output or spoken word output. [Claim 10] The method according to claim 1, wherein the content type is detected according to an audio activity detection algorithm. [Claim 11] A non-temporary storage medium comprising program code that, when executed by a processor, adjusts the clarity of audio output in a changing environment, wherein the program code is The steps include receiving a content signal and The steps include applying a customized gain to the content signal, A non-temporary storage medium comprising program code, the step of outputting the content signal having the customized gain to at least one speaker for conversion to an acoustic signal, wherein the customized gain is applied per frequency bin such that smaller amplitude frequencies are enhanced to larger amplitude frequencies and the intelligibility of the acoustic signal is set to an substantially desired level, and the customized gain is determined according to at least one of the gain applied to the content signal, the bandwidth of the content signal, and the content type encoded by the content signal. [Claim 12] The customized gain is a non-temporary storage medium comprising the program code according to claim 11, based on dynamic range compression. [Claim 13] A non-temporary storage medium comprising the program code according to claim 12, wherein the customized gain is further based on equalization. [Claim 14] A non-temporary storage medium comprising the program code according to claim 13, wherein the equalization is a spectral slope. [Claim 15] A non-temporary storage medium comprising the program code according to claim 11, wherein the gain applied to the content signal is set according to volume control. [Claim 16] A non-temporary storage medium comprising the program code according to claim 11, wherein the audio output is generated in the vehicle cabin, and the gain is set at least in part according to the road noise in the vehicle cabin and according to volume control. [Claim 17] A non-temporary storage medium comprising the program code according to claim 16, wherein the gain set according to the road noise in the vehicle interior consists of a set of frequency-dependent gain adjustments. [Claim 18] A non-temporary storage medium comprising the program code according to claim 12, wherein the dynamic range compression is performed only within the bandwidth of the signal. [Claim 19] A non-temporary storage medium comprising the program code according to claim 11, wherein the content type is one of music output or spoken word output. [Claim 20] The content type is detected according to an audio activity detection algorithm in a non-temporary storage medium comprising the program code according to claim 11.

Images