Enhancement of Multichannel Audio

摘要

The invention relates to audio signal processing. More specifically, the invention relates to enhancing multichannel audio, such as television audio, by applying a gain to the audio that has been smoothed between portions of the audio. The invention relates to methods, apparatus for performing such methods, and to software stored on a computer-readable medium for causing a computer to perform such methods.

主权项

1. A method for enhancing an audio signal, wherein the audio signal comprises two or more channels of audio content, the method comprising:
examining a portion of the audio signal to determine whether the portion contains one or more characteristics of speech, and if the portion contains one or more characteristics of speech, classifying the portion as a speech portion, said examining including:
applying a first portion of the audio signal to a speech versus other sound (SVO) detector,applying a second portion of the audio signal to a voice activity detector (VAD), andbiasing a decision by the VAD based on the SVO output; calculating a gain for the speech portion; and applying the calculated gain to the audio signal.