SIGNAL PROCESSING APPARATUS FOR ENHANCING A VOICE COMPONENT WITHIN A MULTI-CHANNEL AUDIO SIGNAL
First Claim
1. A signal processing apparatus for enhancing a voice component within a multi-channel audio signal, the multi-channel audio signal comprising a left channel audio signal (L), a center channel audio signal (C), and a right channel audio signal (R), the signal processing apparatus comprising:
- a filter configured to;
determine a measure representing an overall magnitude of the multi-channel audio signal over frequency based on the left channel audio signal (L), the center channel audio signal (C), and the right channel audio signal (R),obtain a gain function (G) based on a ratio between a measure of magnitude of the center channel audio signal (C) and the measure representing the overall magnitude of the multi-channel audio signal,weight the left channel audio signal (L) by the gain function (G) to obtain a weighted left channel audio signal (LE),weight the center channel audio signal (C) by the gain function (G) to obtain a weighted center channel audio signal (CE), andweight the right channel audio signal (R) by the gain function (G) to obtain a weighted right channel audio signal (RE); and
a combiner configured to;
combine the left channel audio signal (L) with the weighted left channel audio signal (LE) to obtain a combined left channel audio signal (LEV),combine the center channel audio signal (C) with the weighted center channel audio signal (CE) to obtain a combined center channel audio signal (CEV), andcombine the right channel audio signal (R) with the weighted right channel audio signal (RE) to obtain a combined right channel audio signal (REV).
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Abstract
A signal processing apparatus for enhancing a voice component within a multi-channel audio signal comprising a left channel audio signal, a center channel audio signal, and a right channel audio signal, the signal processing apparatus comprising a filter and a combiner; wherein the filter is configured to determine an overall magnitude of the multi-channel audio signal over frequency based on the multi-channel audio signal, to obtain a gain function based on a ratio between a magnitude of the center channel audio signal and the overall magnitude of the multi-channel audio signal, and to weight the left channel audio signal, the center channel audio signal, and the right channel audio signal by the gain function; and wherein the combiner is configured to combine individually the left channel audio signal, the center channel audio signal, and the right channel audio signal with the weighted right channel audio signal.
75 Citations
17 Claims
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1. A signal processing apparatus for enhancing a voice component within a multi-channel audio signal, the multi-channel audio signal comprising a left channel audio signal (L), a center channel audio signal (C), and a right channel audio signal (R), the signal processing apparatus comprising:
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a filter configured to; determine a measure representing an overall magnitude of the multi-channel audio signal over frequency based on the left channel audio signal (L), the center channel audio signal (C), and the right channel audio signal (R), obtain a gain function (G) based on a ratio between a measure of magnitude of the center channel audio signal (C) and the measure representing the overall magnitude of the multi-channel audio signal, weight the left channel audio signal (L) by the gain function (G) to obtain a weighted left channel audio signal (LE), weight the center channel audio signal (C) by the gain function (G) to obtain a weighted center channel audio signal (CE), and weight the right channel audio signal (R) by the gain function (G) to obtain a weighted right channel audio signal (RE); and a combiner configured to; combine the left channel audio signal (L) with the weighted left channel audio signal (LE) to obtain a combined left channel audio signal (LEV), combine the center channel audio signal (C) with the weighted center channel audio signal (CE) to obtain a combined center channel audio signal (CEV), and combine the right channel audio signal (R) with the weighted right channel audio signal (RE) to obtain a combined right channel audio signal (REV). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A signal processing method for enhancing a voice component within a multi-channel audio signal, the multi-channel audio signal comprising a left channel audio signal (L), a center channel audio signal (C), and a right channel audio signal (R), the signal processing method comprising:
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determining a measure representing an overall magnitude of the multi-channel audio signal over frequency based on the left channel audio signal (L), the center channel audio signal (C), and the right channel audio signal (R); obtaining a gain function (G) based on a ratio between a measure of magnitude of the center channel audio signal (C) and the measure representing the overall magnitude of the multi-channel audio signal; weighting the left channel audio signal (L) by the gain function (G) to obtain a weighted left channel audio signal (LE); weighting the center channel audio signal (C) by the gain function (G) to obtain a weighted center channel audio signal (CE); weighting the right channel audio signal (R) by the gain function (G) to obtain a weighted right channel audio signal (RE); combining the left channel audio signal (L) with the weighted left channel audio signal (LE) to obtain a combined left channel audio signal (LEV); combining the center channel audio signal (C) with the weighted center channel audio signal (CE) to obtain a combined center channel audio signal (CEV); and combining the right channel audio signal (R) with the weighted right channel audio signal (RE) to obtain a combined right channel audio signal (REV).
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17. A computer readable medium comprising a program code that, when executed by a processor, causes a computer system to enhance a voice component within a multi-channel audio signal, the multi-channel audio signal comprising a left channel audio signal (L), a center channel audio signal (C), and a right channel audio signal (R), by performing the steps of:
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determining a measure representing an overall magnitude of the multi-channel audio signal over frequency based on the left channel audio signal (L), the center channel audio signal (C), and the right channel audio signal (R); obtaining a gain function (G) based on a ratio between a measure of magnitude of the center channel audio signal (C) and the measure representing the overall magnitude of the multi-channel audio signal; weighting the left channel audio signal (L) by the gain function (G) to obtain a weighted left channel audio signal (LE); weighting the center channel audio signal (C) by the gain function (G) to obtain a weighted center channel audio signal (CE); weighting the right channel audio signal (R) by the gain function (G) to obtain a weighted right channel audio signal (RE); combining the left channel audio signal (L) with the weighted left channel audio signal (LE) to obtain a combined left channel audio signal (LEV); combining the center channel audio signal (C) with the weighted center channel audio signal (CE) to obtain a combined center channel audio signal (CEV); and combining the right channel audio signal (R) with the weighted right channel audio signal (RE) to obtain a combined right channel audio signal (REV).
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Specification