Method and apparatus for creating a virtual third channel in a two-channel apmlifier
First Claim
1. A method for creating a third signal channel from an input signal received in each of a first and second channel, comprising the steps of:
- shifting a predetermined frequency range of signals in the first channel out of phase with the input signal in the first channel;
inverting the shifted signal in the first channel to produce an inverted signal, wherein the predetermined frequency range of signals in the inverted signal in the first channel is out of phase with a corresponding frequency range of signals in the second channel; and
communicating the inverted signal in the first channel and the signal in the second channel to a third channel speaker as the third signal channel.
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Abstract
A method and apparatus for creating a third signal channel from an input signal received in each of a first and second channel involves inverting a predetermined frequency range of signals in the first channel out of phase with a corresponding frequency range of signals in the second channel. Thereafter, the inverted signal in the first channel and the corresponding frequency signal in the second channel may be communicated to a speaker, which is bridged across the first and second channels, as the third signal channel. This speaker produces sound corresponding to the difference (i.e., the frequency range determined by the predetermined bandwidth of the inverted signal) between the inverted signal in the first channel and the corresponding frequency signal in the second channel.
19 Citations
20 Claims
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1. A method for creating a third signal channel from an input signal received in each of a first and second channel, comprising the steps of:
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shifting a predetermined frequency range of signals in the first channel out of phase with the input signal in the first channel;
inverting the shifted signal in the first channel to produce an inverted signal, wherein the predetermined frequency range of signals in the inverted signal in the first channel is out of phase with a corresponding frequency range of signals in the second channel; and
communicating the inverted signal in the first channel and the signal in the second channel to a third channel speaker as the third signal channel. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for creating a third channel signal from an input signal received in each of a first and second channel, comprising:
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a filter configured to shift a predetermined frequency range of signals in the first channel out of phase with the input signal in the first channel;
an inverter configured to invert the shifted signal in the first channel to produce an inverted signal, wherein the predetermined frequency range of signals in the inverted signal in the first channel is out of phase with a corresponding frequency range of signals in the second channel; and
wherein the differential of the predetermined frequency range of signals in the inverted signal in the first channel and the corresponding frequency range of signals in the second channel comprise the third channel signal. - View Dependent Claims (7, 8, 9)
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10. A method for creating a third channel from an input signal received in each of a first and second channel, comprising the steps of:
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receiving an input signal in each of a first and second channel;
passing high frequency signals in each of the first and second channels;
summing the input signal in the first channel with the input signal in the second channel to produce a summed signal;
amplifying the summed signal in accordance with a predetermined gain;
passing low frequency signals in the summed signal;
combining the passed high frequencies in the first channel with the summed signal; and
inverting the summed signal in the second channel, wherein the low frequency signals in the second channel are out of phase with the low frequency signals in the first channel. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An apparatus for creating a third channel from an input signal received in each of a first and second channel, comprising:
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a high pass filter to pass high frequency signals in each of the first and second channels;
a summing circuit configured to sum the input signal in the first channel with the input signal in the second channel, wherein the summing circuit produces summed signal;
a low pass filter configured to pass low frequency signals in the summed signal, wherein the low pass filter outputs a low frequency summed signal;
a first channel combining circuit configured to combine the high frequency signals in the first channel with the low frequency summed signal to produce a first channel output signal; and
a second channel combining circuit configured to combine the high frequency signals in the second channel with the low frequency summed signal to produce a second channel output signal, wherein the low frequency signals in the second channel output signal are out of phase with the low frequency signals in the first channel output signal. - View Dependent Claims (17, 18, 19, 20)
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Specification