Multi-channel audio enhancement system
AssigneeDTS, Inc.
InventorsHideaki Kato, Alan Kraemer, Sarah Yang
Life of this patent
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Abstract
A method for processing audio signals can include applying at least one front perspective filter to each of left and right front audio signals to yield filtered left and right front output signals, where the left and right front output signals each drive a front speaker. Moreover, the method can include applying at least one rear perspective filter to each of left and right rear audio signals to yield left and right rear output signals, where the left and right rear output signals each drive a rear speaker to simulate a rear surround sound effect when positioned in front of a listener.
Claims18
A method for processing audio signals, the method comprising:
- receiving left and right front audio signals, the left and right front audio signals each comprising information about a front spatial position of a sound source relative to a listener;
- receiving left and right rear audio signals, the left and right rear audio signals each comprising information about a rear spatial position of a sound source relative to a listener;
- applying one or more definition filters to the filtered left and right front output signals to enhance the left and right front input signals, the one or more definition filters comprising a high-pass shelving filter configured to produce left and right front output signals;
- providing the left and right front output signals to first front speakers;
- applying at least one rear perspective filter to each of the left and right rear audio signals to yield left and right rear output signals;
- and
- applying the left and right rear output signals to second front speakers, wherein the left and right rear output signals are each configured to drive one of the second front speakers to simulate a rear surround sound effect.
A system for processing audio signals, the system comprising:
- a definition module configured to:
- receive left and right front audio signals each comprising information about a front spatial position of a sound source relative to a listener,
- apply one or more definition filters comprising a high-pass shelving filter to the left and right front input signals to enhance the left and right front input signals and thereby produce left and right front output signals, and
- output the left and right front output signals for playback by first front speakers;
- and
- at least one rear perspective filter configured to:
- receive left and right rear audio signals each comprising information about a rear spatial position of a sound source relative to a listener,
- filter each of the left and right rear audio signals to yield left and right rear output signals, and
- output the left and right rear output signals for playback by second front speakers, wherein the left and right rear output signals are each configured to drive one of the second front speakers to simulate a rear surround sound effect.
Dependencies are inferred from the claim text.