Multi-channel audio enhancement system for use in recording and playback and methods for providing same
First Claim
1. A method of processing a plurality of audio source signals to create a pair of audio output signals, the method comprising:
- receiving a plurality of n pairs of audio input signals, each pair of audio input signals comprising a left input signal and a right input signal;
combining each pair of the n pairs of audio input signals to form n pairs of combined audio signals;
processing each pair of the n pairs of combined audio signals to form n pairs of processed audio signals, wherein processing each pair of the n pairs of combined audio signals comprises applying a frequency response curve to at least one pair of the n pairs of combined audio signals, wherein a gain of the frequency response curve has a peak gain at approximately 125 Hz and the gain decreases above and below approximately 125 Hz at a rate of approximately 6dB per octave, and wherein the gain of the frequency response curve has a minimum gain at frequencies between approximately 1.5 kHz to approximately 2.5 kHz and the gain increases above frequencies between approximately 1.5kHz to approximately 2.5 kHz at a rate of approximately 6 dB per octave up to approximately 7 kHz and continues to increase up to approximately 20 kHz;
combining at least one of the n left input signals with at least one of the n pairs of processed audio signals to generate a first audio output; and
combining at least one of the n right input signals with at least one of the n pairs of processed audio signals to generate a second audio output signal.
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Accused Products
Abstract
An audio enhancement system and method for use receives a group of multi-channel audio signals and provides a simulated surround sound environment through playback of only two output signals. The multi-channel audio signals comprise a pair of front signals intended for playback from a forward sound stage and a pair of rear signals intended for playback from a rear sound stage. The front and rear signals are modified in pairs by separating an ambient component of each pair of signals from a direct component and processing at least some of the components with a head-related transfer function. Processing of the individual audio signal components is determined by an intended playback position of the corresponding original audio signals. The individual audio signal components are then selectively combined with the original audio signals to form two enhanced output signals for generating a surround sound experience upon playback.
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Citations
9 Claims
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1. A method of processing a plurality of audio source signals to create a pair of audio output signals, the method comprising:
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receiving a plurality of n pairs of audio input signals, each pair of audio input signals comprising a left input signal and a right input signal; combining each pair of the n pairs of audio input signals to form n pairs of combined audio signals; processing each pair of the n pairs of combined audio signals to form n pairs of processed audio signals, wherein processing each pair of the n pairs of combined audio signals comprises applying a frequency response curve to at least one pair of the n pairs of combined audio signals, wherein a gain of the frequency response curve has a peak gain at approximately 125 Hz and the gain decreases above and below approximately 125 Hz at a rate of approximately 6dB per octave, and wherein the gain of the frequency response curve has a minimum gain at frequencies between approximately 1.5 kHz to approximately 2.5 kHz and the gain increases above frequencies between approximately 1.5kHz to approximately 2.5 kHz at a rate of approximately 6 dB per octave up to approximately 7 kHz and continues to increase up to approximately 20 kHz; combining at least one of the n left input signals with at least one of the n pairs of processed audio signals to generate a first audio output; and combining at least one of the n right input signals with at least one of the n pairs of processed audio signals to generate a second audio output signal. - View Dependent Claims (2, 3, 4)
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5. A method of processing n audio input signal pairs to create m audio output signals, the method comprising:
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receiving a plurality of n pairs of audio input signals; enhancing each pair of the n pairs of audio input signals to form n pairs of enhanced audio signals, wherein said enhancing further comprises applying a frequency response curve to at least one pair of the n pairs of combined audio signals, wherein a gain of the frequency response curve has a peak gain at approximately 125 Hz and the gain decreases above and below approximately 125 Hz at a rate of approximately 6 dB per octave, and wherein the gain of the frequency response curve has a minimum gain between approximately 1.5 kHz to approximately 2.5 kHz and the gain increases at frequencies above approximately 1.5 kHz to approximately 2.5 kHz at a rate of approximately 6 dB per octave up to frequencies between approximately 10.5 kHz to approximately 11.5 kHz and decreases at frequencies between approximately 11.5 kHz to approximately 20 kHz; and forming m audio output signals, wherein m is less than n, and wherein forming each of the m audio output signals comprises; combining at least one of the audio input signals with at least one of the n pairs of enhanced audio signals. - View Dependent Claims (6, 7, 8, 9)
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Specification