Sound field controller

Claim 2

A sound field controller for reproducing a sound field with presence comprising; input means for inputting an input audio signal having a first and a second channel signals, signal extracting means for receiving and processing the input audio signal, and producing an extracted signal from the input audio signal, operation means for receiving the extracted signal from the signal extracting means, performing a convolution on the extracted signal, and generating a convolution sum signal, delay means for receiving the convolution sum signal form the operation means and delaying the convolution sum signal by a predetermined time, and producing a delayed signal, adding means for receiving the input audio signal and the delayed signal, and adding the input audio signal and the delayed signal with a predetermined summation ratio to produce a summed signal, and output means for reproducing the summed signal to localize a sound image in a desirable direction.

Claim 3

A sound field controller for reproducing a sound field with presence comprising; input means for inputting an input audio signal having two channel signals, signal extracting means for receiving and processing the input audio signal, and producing an extracted signal from the input audio signal, delay means for delaying the extracted signal by a predetermined time, and producing a delayed signal, signal judging means for receiving the input audio signal and judging whether the input audio signal is a voice signal or a non-voice audio signal to output a detecting signal indicating the result, correlation determining means for determining correlation ratio between the two channel signals of the input signal to output a determining signal, adding means for receiving the input audio signal, the delayed signal, the detecting signal, and the determining signal, adding the input audio signal and the delayed signal with a predetermined summation ratio based on the detecting signal and the determining signal, and producing a resulting summed signal, and output means for reproducing the summed signal.

Claim 4

A sound field controller for reproducing a sound field with presence comprising; input means for inputting an input audio signal having two channel signals, signal extracting means for receiving and processing the input audio signal, and producing an extracted signal from the input audio signal, delay means for delaying the extracted signal by a predetermined time, and producing a delayed signal, signal judging means for receiving the input audio signal and judging whether the input audio signal is a voice signal or a non-voice audio signal to output a detecting signal indicating the result, correlation determining means for determining correlation ratio between the two channel signals of the input signal to output a determining signal, adding means for receiving the input audio signal, the delayed signal, the detecting signal, and the determining signal, adding the input audio signal and the delayed signal with a predetermined summation ratio based on the detecting signal and the determining signal, and producing a resulting summed signal, and output means for reproducing the summed signal.

Claim 5

A sound field controller for reproducing a sound field with presence comprising; input means for inputting an input audio signal having two channel signals, signal extracting means for receiving and processing the input audio signal, and producing an extracted signal from the input audio signal, signal processing means for receiving the extracted signal, and for adding a reflected sound signal and/or a reverberated sound signal to the extracting signal to produce a processed signal, adding means for receiving the input audio signal and the processed signal, and adding the input audio signal and the processed signal with a predetermined summation ratio to produce a summed signal, and output means for reproducing the summed signal.

Claim 6

A sound field controller for reproducing a sound field with presence comprising; input means for inputting an input audio signal having two channel signals, signal extracting means for receiving and processing the input audio signal, and producing an extracted signal from the input audio signal, signal processing means for receiving the extracted signal, and for adding a reflected sound signal and/or a reverberated sound signal to the extracting signal to produce a processed signal, adding means for receiving the input audio signal and the processed signal, and adding the input audio signal and the processed signal with a predetermined summation ratio to produce a summed signal, and output means for reproducing the summed signal.

Claim 7

A sound field controller for reproducing a sound field with presence comprising; input means for inputting an input audio signal having two channel signals, signal processing means for receiving the input audio signal, and for adding a reflected sound signal and/or a reverberation signal to the input audio signal to produce a processed signal, operation means for receiving the processed signal from the signal processing means, performing the convolution on the processed signal, and generating a convolution sum signal, adding means for receiving the processed signal and the convolution sum signal, and adding the processed signal and the convolution sum signal with a predetermined summation ratio to produce a summed signal, and output means for reproducing the summed signal to localize a sound image in a desirable direction.

Claim 8

A sound field controller for reproducing a sound field with presence comprising; input means for inputting an input audio signal having two channel signals, signal processing means for receiving the input audio signal, and for adding a reflected sound signal and/or a reverberation signal to the input audio signal to produce a processed signal, operation means for receiving the processed signal from the signal processing means, performing the convolution on the processed signal, and generating a convolution sum signal, adding means for receiving the processed signal and the convolution sum signal, and adding the processed signal and the convolution sum signal with a predetermined summation ratio to produce a summed signal, and output means for reproducing the summed signal to localize a sound image in a desirable direction.

Claim 9

A sound field controller according to claim 1, wherein; the operation means comprises a first, a second, a third, and a forth operation portions, the delay means comprises a first, a second, a third, and a forth delay elements, each delay element receiving the convolution sum signal from the corresponding operation portion, and the adding means comprises a first and a second adders, the first adder receiving the first channel signal of the input signal and the delayed signal from the first and the third delay elements, the second adder receiving the second channel signal of the input audio signal and the delayed signal from the second and the forth delay elements.

Claim 10

A sound field controller according to claim 1, further comprises; signal judging means for receiving the input audio signal and judging whether the input audio signal is a voice signal or a non-voice audio signal to output a detecting signal indicating the result, correlation determining means for determining correlation ratio between the two channel signals of the input signal to output a determining signal, wherein, the adding means further receives the detecting signal and the determining signal, and adjusts the summation ratio based on the detecting signal and the determining signal.

Claim 11

A sound field controller according to claim 1, further comprises signal processing means for receiving the input audio signal, adding a reflected sound signal and/or a reverberated sound signal to the input audio signal to produce a processed signal, and applying the processed signal to the operation means.

Claim 12

A sound field controller according to claim 1, wherein; the operation means comprises a first and a second operation portions, the delay means comprises a first, a second, a third, and a forth delay elements, the first and the second delay elements receiving the convolution sum signal from the first operation portion, the third and the forth delay elements receiving the convolution sum signal from the second operation portion, and the adding means comprises a first and a second adders, the first adder receiving the first channel signal of the input signal and the delayed signals from the first and the third delay elements, the second adder receiving the second channel signal of the input audio signal and the delayed signals from the second and the forth delay elements.

Claim 13

A sound field controller according to claim 3, further comprises; signal judging means for receiving the input audio signal and judging whether the input audio signal is a voice signal or a non-voice audio signal to output a detecting signal indicating the result, correlation determining means for determining correlation ratio between the two channel signals of the input signal to output a determining signal, wherein, the adding means further receives the detecting signal and the determining signal, and adjusts the summation ratio based on the detecting signal and the determining signal.

Claim 14

A sound field controller according to claim 5, further comprises signal processing means for receiving the audio sound signal, adding a reflected sound signal and/or a reverberated sound signal to the audio sound signal to produce a processed signal, and apply-ing the processed signal to the operation means, the signal processing means including a first processing part for the first and the second operation portions and a second processing part for the third and the forth operation portions.

Claim 15

A sound field controller according to claim 7, further comprises; signal judging means for receiving the audio sound signal and judging whether the audio sound signal is a voice signal or a non-voice audio signal to output a detecting signal indicating the result, correlation determining means for determining correlation ratio between the two channel signals of the input signal to output a determining signal, wherein, the adding means further receives the detecting signal and the determining signal, and adjusts the summation ratio based on the detecting signal and the determining signal.

Claim 16

A sound field controller for reproducing a sound field with presence comprising; input means for inputting an audio sound signal having a first and a second channel signals, signal extracting means for receiving and processing the audio sound signal, and producing a sum signal and a difference signal of the first and a second channel signals, signal processing means for receiving the sum signal and the difference signal, and for adding a reflected sound signal and/or a reverberated sound signal to the sum signal and the difference signal to produce a processed signal, adding means for receiving the audio sound signal the processed signal, and adding the audio sound signal and the processed signal with a predetermined summation ratio to produce a summed signal, output means for reproducing the summed signal.

Claim 17

A sound field controller for reproducing a sound field with presence comprising; input means for inputting an audio sound signal having a first and a second channel signals, signal extracting means for receiving and processing the audio sound signal, and producing a sum signal and a difference signal of the first and a second channel signals, signal processing means for receiving the sum signal and the difference signal, and for adding a reflected sound signal and/or a reverberated sound signal to the sum signal and the difference signal to produce a processed signal, adding means for receiving the audio sound signal the processed signal, and adding the audio sound signal and the processed signal with a predetermined summation ratio to produce a summed signal, output means for reproducing the summed signal.

Claim 18

A sound field controller according to claim 12, further comprises; signal judging means for receiving the audio sound signal and judging whether the audio sound signal is a voice signal or a non-voice audio signal to output a detecting signal indicating the result, correlation determining means for determining correlation ratio between the first and the second channel signals of the input signal to output a determining signal, wherein, the signal processing means includes a first processing portion for receiving the sum signal, and for adding a reflected sound signal and/or a reverberated sound signal to the sum signal to produce a first and a second processed signals; and a second processing portion for receiving the difference signal, and for adding a reflected sound signal and/or a reverberated sound signal to the difference signal to produce a third and a forth processed signals, the adding means includes a first adder for receiving the second channel signal and the first and the third processed signals, and for adding the second channel signal and the first and the third processed signals with a predetermined summation ratio to produce a first summed signal; and a second adder for receiving the first channel signal and the second and the forth processed signals, and for adding the first channel signal and the second and the forth processed signals with a predetermined summation ratio to produce a second summed signal, each of the first and second adders further receiving the detecting signal and the determining signal and adjusting the summation ratio based on the detecting signal and the determining signal, and the output means includes a first output portion for the first summed signal and a second output portion for the second summed signal.

Claim 19

A sound field controller according to claim 12, further comprises signal mixing means, wherein, the signal processing means includes a first processing portion for receiving the sum signal, and for adding a reflected sound signal and/or a reverberated sound signal to the sum signal to produce a first and a second processed signals; and a second processing portion for receiving the difference signal, and for adding a reflected sound signal and/or a reverberated sound signal to the difference signal to produce a third and a forth processed signals, the adding means includes a first adder for receiving the first and the third processed signals, and for adding the first and the third processed signals with a predetermined summation ratio to produce a first output signal; and a second adder for receiving the second and the forth processed signals, and for adding the second and the forth processed signals with a predetermined summation ratio to produce a second output signal, the signal mixing means receives the first and the second output signals, subtracts the second output signal from the first output signal with a predetermined subtracting ratio to produce a first summed signal, and add the first output signal to the second output signal with a predetermined summation ratio to produce a second summed signal, and the output means includes a first output portion for the first summed signal and a second output portion for the second summed signal.

Claim 20

A sound field controller according to claim 14, further comprises; signal judging means for receiving the audio sound signal and judging whether the audio sound signal is a voice signal or a non-voice audio signal to output a detecting signal indicating the result, correlation determining means for determining correlation ratio between the first and the second channel signals of the input signal to output a determining signal, wherein, the signal mixing means further receives the detecting signal and the determining signal, and adjusts the summation ratio and the subtracting ratio based on the detecting signal and the determining signal.