Equalization profiles for dynamic equalization of audio data

摘要

Apparatuses for and methods of carrying out dynamic equalization processing of an audio signal, and apparatuses for and methods of controlling such equalization processing of the audio signal to dynamically adjust the time-varying spectrum of an audio signal to more closely match a user specified target time-invariant perceived audio signal spectrum while preserving the original dynamic range of the audio signal. The dynamic equalization is carried out according to a user-defined spectral profile specified by a control interface that allows a user to define, create, modify and/or apply the user-defined spectral profile.

主权项

1. A method of operating an audio signal processing apparatus to process an audio signal, the method comprising:
accepting an audio signal; selecting a predefined dynamic equalization (DEQ) spectral profile from a plurality of predefined spectral profiles that are locally stored or that have been remotely stored; processing the audio signal using the audio signal processing apparatus according to the selected predefined DEQ spectral profile to generate a processed audio signal, the processing including determining a spectral measure that is modified, including carrying out perceptual domain dynamic equalization, to dynamically adjust the time-varying spectral profile of the audio signal to more closely match a time invariant spectral profile according to the selected predefined DEQ spectral profile, the processed audio signal being for playback in a reproduction environment using a reproduction apparatus,
wherein the plurality of predefined DEQ spectral profile includes:at least one device-specific DEQ spectral profile to equalize for one or more characteristics of the reproduction apparatus, or one or more characteristics of the reproduction environment, or characteristics of both the reproduction environment and the reproduction apparatus, and/orat least one content-specific DEQ spectral profile to equalize according to the content or type of content represented by the audio signal, and/orat least one equalization-type specific DEQ spectral profile to equalize according to a type of equalization effect wherein the equalizing according to the type of equalization effect is boost treble equalization, boost bass equalization, or flatten equalization.