Abstract: This invention provides a signal processing apparatus for effectively detecting an abrupt change in an input signal. The signal processing apparatus includes a converter that converts an input signal into a phase component signal and an amplitude component signal in a frequency domain. The signal processing apparatus further includes a calculator that calculates feature amounts of the phase component signal and the amplitude component signal derived by the converter. The signal processing apparatus further includes a determiner that determines presence probability of an abrupt change in the input signal based on the feature amounts calculated by the calculator.

Abstract: To obtain a high-quality enhanced signal, disclosed is a signal processing apparatus including a transform unit that transforms a mixed signal in which a first signal and a second signal coexist, into a phase component and a magnitude component or power component for each frequency, a first control unit that replaces the phase component of a predetermined frequency, a second control unit that modifies the magnitude component or power component of the predetermined frequency in accordance with the amount of a change of the magnitude component or power component that arises from replacement by the first control unit, and a reconstruction unit that reconstructs the phase component replaced by the first control unit and the magnitude component or power component modified by the second control unit.

Abstract: There is proposed a signal processing apparatus for enhancing a target signal and suppressing the remaining components without increasing an array size or the number of sensors. This signal processing apparatus includes a first array processor that generates a first array processing signal by enhancing a predetermined signal among signals received from a plurality of sensors, and a decorrelator that generates a decorrelated signal by removing, from the first array processing signal, a signal component correlated with a signal received from an auxiliary sensor different from the plurality of sensors.

Abstract: A signal processing apparatus for effectively detecting an abrupt change in a signal, in particular, an abrupt change different from an ideal pulse includes a converter that converts an input signal into a phase component signal in a frequency domain, a first calculator that calculates a phase gradient for each of a plurality of frequencies of the phase component signal as a first phase gradient, a weighting unit that weights the first phase gradient with an amplitude or a power of the input signal, thereby calculating a weighted first phase gradient, a second calculator that calculates a second phase gradient based on the weighted first phase gradient, and a determiner that determines presence of an abrupt change in the input signal based on the first phase gradient and the second phase gradient.

Abstract: Disclosed is a signal processing apparatus that processes an input signal to accurately detect an abrupt change in the input signal in accordance with the degree of linear change of a phase component in a frequency domain. The signal processing apparatus includes a converter that converts the input signal into the phase component and an amplitude component in the frequency domain, a linearity calculator that calculates the linearity of the phase component in the frequency domain, and a determiner that determines presence of the abrupt change in the input signal based on the linearity calculated by the linearity calculator.

Abstract: This invention provides a signal processing apparatus for effectively detecting an abrupt change in an input signal. The signal processing apparatus includes a converter that converts an input signal into a phase component signal and an amplitude component signal in a frequency domain. The signal processing apparatus further includes a calculator that calculates feature amounts of the phase component signal and the amplitude component signal derived by the converter. The signal processing apparatus further includes a determiner that determines presence probability of an abrupt change in the input signal based on the feature amounts calculated by the calculator.

Abstract: A signal processing device enables a high quality enhanced signal to be obtained, and includes: a transform unit which transforms a mixed signal in which a first signal and a second signal are mixed, into a phase component and an amplitude component or a power component in each frequency; a first control unit which rotates the phase component in a predetermined frequency; a second control unit which compensates the amplitude component or the power component in the predetermined frequency according to the amount of change of the amplitude component or the power component rotated by the first control unit; and a synthesizing unit which synthesizes the phase component rotated by the first control unit, and the amplitude component or the power component compensated by the second control unit.

Abstract: To obtain a high-quality enhanced signal, disclosed is a signal processing apparatus including a transform unit that transforms a mixed signal in which a first signal and a second signal coexist, into a phase component and a magnitude component or power component for each frequency, a first control unit that replaces the phase component of a predetermined frequency, a second control unit that modifies the magnitude component or power component of the predetermined frequency in accordance with the amount of a change of the magnitude component or power component that arises from replacement by the first control unit, and a reconstruction unit that reconstructs the phase component replaced by the first control unit and the magnitude component or power component modified by the second control unit.

Abstract: The present invention enables a high quality enhanced signal to be obtained, and comprises: a transform means of transforming a mixed signal, wherein a first signal and a second signal are mixed, to a phase component and an amplitude component or a power component in each frequency; a first control means of rotating the phase component in predetermined frequency; a second control means of compensating the amplitude component or the power component in the predetermined frequency in accordance with the amount of change of the amplitude component or the power component due to the rotation performed by the first control means; and a synthesizing means of synthesizing the phase component rotated by the first control means, and the amplitude component or the power component compensated by the second control means.

Abstract: To suppress both noise having an unknown characteristic and noise having a known characteristic, provided is an information processing device comprising a noise suppression means for suppressing noise included in an inputted deteriorated signal, which is characterized by that said noise suppression means includes a first output means for outputting known-noise information, in order to suppress known noise having known characteristics, and a second output means for outputting unknown-noise information by estimating unknown noise having unknown characteristics, in order to suppress the unknown noise.

Abstract: [Problems to be Solved] In view of the problem of known wireless communication systems for a level, it is an object of the present invention to provide a wireless system that can operate both for individual communications and simultaneous communications. [Means for Solving Problems] A wireless communication system for a level according to the present invention characterized in that the system comprises a central monitoring unit, mobile stations operating as moving object wireless terminals, and an underground base station, and that the central monitoring unit can selectively operate either in a simultaneous talk mode of talking to all the mobile stations through the underground base station or in an individual talk mode of selecting a specific mobile station based on the mobile station identification information so as to talk to the selected mobile station through the underground base station.