System and methods for processing stereo audio content
AssigneeDTS, Inc.
InventorMartin Walsh
Life of this patent
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Abstract
A system can include a hardware processor that can receive left and right audio signals and process the left and right audio signals to generate three or more processed audio signals. The three or more processed audio signals can include a left audio signal, a right audio signal, and a center audio signal. The processor can also filter each of the left and right audio signals with one or more first virtualization filters to produce filtered left and right signals. The processor can also filter a portion of the center audio signal with a second virtualization filter to produce a filtered center signal. Further, the processor can combine the filtered left signal, filtered right signal, and filtered center signal to produce left and right output signals and output the filtered left and right output signals.
Claims19
A method comprising:
- under control of a hardware processor:
- receiving left and right audio channels;
- combining at least a portion of the left audio channel with at least a portion of the right audio channel to produce a center channel, the center channel comprising a first portion to be filtered and a second portion not to be filtered;
- deriving left and right audio signals at least in part from the center channel;
- applying a first virtualization filter comprising a first head-related transfer function to the left audio signal to produce a virtualized left channel;
- applying a second virtualization filter comprising a second head-related transfer function to the right audio signal to produce a virtualized right channel;
- applying a third virtualization filter comprising a third head-related transfer function to the first portion of the center channel to produce a virtualized center channel;
- mixing the virtualized center channel, the second portion of the center channel, and the virtualized left and right channels to produce left and right output signals;
- and
- outputting the left and right output signals to headphone speakers for playback over the headphone speakers.
A method comprising:
- under control of a hardware processor:
- processing a two channel audio signal comprising two audio channels to generate three or more processed audio channels, the three or more processed audio channels comprising a left channel, a right channel, and a center channel, the center channel derived from a combination of the two audio channels of the two channel audio signal;
- applying each of the processed audio channels to the input of a virtualization system;
- applying one or more virtualization filters of the virtualization system to the left channel, the right channel, and a first portion of the center channel to produce a virtualized left channel, a virtualized right channel, and a virtualized center channel;
- combining the virtualized left channel, the virtualized right channel, the virtualized center channel, and a second portion of the center channel to produce a virtualized two channel signal;
- and
- outputting the virtualized two channel audio signal for playback on headphones.
A system comprising:
- a hardware processor configured to:
- receive left and right audio signals;
- process the left and right audio signals to generate three or more processed audio signals, the three or more processed audio signals comprising a left audio signal, a right audio signal, and a center audio signal;
- filter each of the left and right audio signals with one or more first virtualization filters to produce filtered left and right signals;
- filter a first portion of the center audio signal with a second virtualization filter to produce a filtered center signal, without filtering a second portion of the center audio signal;
- combine the filtered left signal, filtered right signal, filtered center signal, and the second portion of the center audio signal to produce left and right output signals;
- and
- output the filtered left and right output signals.
Dependencies are inferred from the claim text.