Methods and devices for bass management
AssigneeDolby Laboratories Licensing Corporation
InventorsCharles Q. ROBINSON, Mark R. P. THOMAS, Michael J. SMITHERS
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Abstract
Some disclosed methods involve multi-band bass management. Some such examples may involve applying multiple high-pass and low-pass filter frequencies for the purpose of bass input management. Some disclosed methods treat at least some low-frequency signals as audio objects that can be panned. Some disclosed methods involve panning low and high frequencies separately. Following high-pass rendering, a power audit may determine a low-frequency deficit factor that is to be reproduced by subwoofers or other low-frequency-capable loudspeakers.
Claims16
An audio processing method, comprising:
- receiving audio data, the audio data comprising a plurality of audio objects, the audio objects including audio data and associated metadata, the metadata including audio object position data;
- receiving reproduction speaker layout data comprising an indication of one or more reproduction speakers in the reproduction environment and an indication of a location of the one or more reproduction speakers within the reproduction environment, wherein the reproduction speaker layout data includes low-frequency-capable (LFC) loudspeaker location data corresponding to one or more LFC reproduction speakers of the reproduction environment and main loudspeaker location data corresponding to one or more main reproduction speakers of the reproduction environment;
- rendering the audio objects into speaker feed signals based, at least in part, on the associated metadata and the reproduction speaker layout data, wherein each speaker feed signal corresponds to one or more reproduction speakers within a reproduction environment;
- applying a high-pass filter to at least some of the speaker feed signals, to produce high-pass-filtered speaker feed signals;
- applying a low-pass filter to the audio data of each of a plurality of audio objects to produce low-frequency (LF) audio objects;
- panning the LF audio objects based, at least in part, on the LFC loudspeaker location data, to produce LFC speaker feed signals;
- outputting the LFC speaker feed signals to one or more LFC loudspeakers of the reproduction environment;
- and
- providing the high-pass-filtered speaker feed signals to one or more main reproduction speakers of the reproduction environment.
Dependencies are inferred from the claim text.