System and method for frequency domain audio post-processing based on perceptual masking
First Claim
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1. A method of post-processing of a frequency domain audio signal implemented by an audio post-processor, the method comprising:
- applying adaptive modification gain factor to each frequency coefficient of the frequency domain audio signal by using the audio post-processor; and
determining gain factors based on Local Masking Magnitude and Local Masked Magnitude;
wherein the Local Masking Magnitude and Local Masked Magnitude are estimated according to perceptual masking effects,wherein the Local Masking Magnitude is estimated by taking a weighted sum around a specific frequency at i;
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Abstract
In an embodiment, a method of frequency domain post-processing is disclosed. The method includes applying adaptive modification gain factor to each frequency coefficient, and determining gain factors based on Local Masking Magnitude and Local Masked Magnitude.
11 Citations
19 Claims
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1. A method of post-processing of a frequency domain audio signal implemented by an audio post-processor, the method comprising:
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applying adaptive modification gain factor to each frequency coefficient of the frequency domain audio signal by using the audio post-processor; and determining gain factors based on Local Masking Magnitude and Local Masked Magnitude; wherein the Local Masking Magnitude and Local Masked Magnitude are estimated according to perceptual masking effects, wherein the Local Masking Magnitude is estimated by taking a weighted sum around a specific frequency at i; - View Dependent Claims (2)
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3. A method of post-processing of a frequency domain audio signal implemented by using an audio post-processor, the method comprising:
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applying adaptive modification gain factor to each frequency coefficient of the frequency domain audio signal by using the audio post-processor; and determining gain factors based on Local Masking Magnitude, Local Masked Magnitude, and Average Magnitude; wherein the Local Masking Magnitude is estimated by taking a weighted sum around a specific frequency at i; - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for receiving a frequency domain audio signal, the system comprising a post-processor configured to:
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apply an adaptive modification gain factor to each frequency coefficient of the frequency domain audio signal; and determine gain factors based on Local Masking Magnitude and Local Masked Magnitude and Average Magnitude, wherein the post-processor estimates the Local Masking Magnitude by taking a weighted sum around a specific frequency at i; - View Dependent Claims (15, 16, 17, 18, 19)
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Specification