Method and apparatus for signal discrimination
First Claim
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1. An apparatus for discriminating a signal from at least one mixed signal having at least two signal components, comprising:
- an interpreting unit generating a plurality of multiplication parameters based on a plurality of inputs that are related to a mixed signal;
a finite impulse response (FIR) filter outputting a removal-target signal based on the generated multiplication parameters; and
a subtracting unit generating an output signal representing one of the signal components of the at least one mixed signal by subtracting the removal-target signal from a second signal.
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Abstract
In a method and apparatus for discriminating a signal from one or more mixed signals, where the mixed signal may include two or more signal components, an interpreting unit generates a plurality of multiplication parameters based on a plurality of inputs that are related to a mixed signal. A finite impulse response (FIR) filter may output a removal-target signal based on the generated multiplication parameters. A subtracting unit may then generate an output signal representing a signal component of the mixed signal by subtracting the removal-target signal from a second signal.
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Citations
27 Claims
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1. An apparatus for discriminating a signal from at least one mixed signal having at least two signal components, comprising:
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an interpreting unit generating a plurality of multiplication parameters based on a plurality of inputs that are related to a mixed signal;
a finite impulse response (FIR) filter outputting a removal-target signal based on the generated multiplication parameters; and
a subtracting unit generating an output signal representing one of the signal components of the at least one mixed signal by subtracting the removal-target signal from a second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for discriminating a signal from at least one mixed signal having at least two signal components, comprising:
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a first arrangement generating a plurality of first multiplication parameters based on a plurality of first inputs including a first signal that are related to a mixed signal, outputting a first removal-target signal based on the generated first multiplication parameters, and generating a first output signal representing one of the signal components of the at least one mixed signal based on the first removal-target signal and a second signal; and
a second arrangement generating a plurality of second multiplication parameters based on a plurality of second inputs including the second signal that are related to a mixed signal, outputting a second removal-target signal based on the generated second multiplication parameters, and generating a second output signal representing one of the signal components of the at least one mixed signal based on the second removal-target signal and the first signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of discriminating a signal from at least one mixed signal having at least two signal components, comprising:
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generating a plurality of multiplication parameters based on a plurality of inputs that are related to a mixed signal;
outputting a removal-target signal based on the generated multiplication parameters; and
generating an output signal representing one of the signal components of the at least one mixed signal by subtracting the removal-target signal from a second signal. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A method for discriminating a melody signal from at least one acoustic signal composed of at least a melody signal component and a voice signal component, comprising:
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first low pass filtering an input first acoustic signal to output a first signal;
first calculating a plurality of first multiplication parameters based on the first signal, a plurality of first delay signals, and a first output signal;
first filtering to generate the plurality of first delay signals, the first filtering including multiplying the first signal and plurality of first delay signals by corresponding first multiplication parameters to generate a first set of multiplied signals, and summing the first set of multiplied signals to generate a first removal-target signal;
first subtracting the first removal-target signal from a second acoustic signal to generate a first output signal that is an estimate of a melody signal component of the first acoustic signal;
second low pass filtering the second acoustic signal to output a second signal;
second calculating a plurality of second multiplication parameters based on the second signal, a plurality of second delay signals, and a second output signal;
second filtering to generate the plurality of second delay signals, the second filtering step including multiplying the second signal and plurality of second delay signals by corresponding second multiplication parameters, a second set of multiplied signals, and summing the second set of multiplied signals to generate a second removal-target signal; and
second subtracting the second removal-target signal from the first signal to generate a second output signal that is an estimate of a melody signal component of the second acoustic signal. - View Dependent Claims (26, 27)
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Specification