Abstract: A filter coefficient setting device for setting a filter coefficient of an echo prevention device including a first FIR filter, and a second FIR filter, comprises: a filter coefficient initial setting portion configured to set a predetermined filter coefficient for the first and second FIR filters when the echo prevention device is started.

Abstract: An inflation pressure sensor is mounted in a wheel of a vehicle and determines a tire inflation pressure. A wheel-side communication device transmits a detected tire inflation pressure to a body-side communication device at a predetermined interval. An inflation pressure storing unit stores, as an after-travel inflation pressure, a tire inflation pressure after start of travel of the vehicle. A comparing unit compares the after-travel inflation pressure with a lowest reference pressure. The lowest reference pressure is a tire inflation pressure immediately after start of the vehicle or a predetermined recommended inflation pressure.

Abstract: A height controlling apparatus for controlling at least one actual height as a relative position of (a) a body of a vehicle and (b) at least one wheel of the vehicle relative to each other, the apparatus including at least one height controlling actuator which changes the at least one actual height; and an actuator control device which controls the at least one height controlling actuator so that the at least one actual height approaches at least one target height.

Abstract: A vehicle height adjustment device includes a vehicle height adjustment unit that changes the vehicle height at each wheel of the vehicle; a vehicle height sensor that detects the vehicle height at each wheel; a vehicle height control unit that executes the vehicle height control; a pressure sensor that detects the fluid pressure within the vehicle height adjustment unit; a control stop unit that temporarily suspends the execution of the vehicle height control if the detected pressure exceeds a threshold pressure; a road surface estimation unit that estimates the condition of a road surface over which the vehicle travels; and a control recovery unit that cancels the temporary suspension of the vehicle height control and allows the vehicle height adjustment unit to change the vehicle height if the road surface estimation unit estimates that the road surface over which the vehicle is traveling satisfies a predetermined condition.

Abstract: An echo prevention circuit comprises a first and second FIR filters into which a first input signal is input through an input terminal; an input/output terminal to which an output signal of the first FIR filter is output and the output signal reflected is input or a second input signal is input; a first subtracter that subtracts an output signal of the second FIR filter from a combined signal of the output signal of the first FIR filter and the second input signal; an adaptive digital filter into which the output signal of the first FIR filter is input; a second subtracter that subtracts the output of the adaptive digital filter from the output of the first subtracter. The adaptive digital filter has such filter coefficients that based on the output of the second subtracter, the output signal from the output terminal is the output from the first subtracter that has had the other than the second input signal removed.

Abstract: An inflation pressure sensor is mounted in a wheel of a vehicle and determines a tire inflation pressure. A wheel-side communication device transmits a detected tire inflation pressure to a body-side communication device at a predetermined interval. An inflation pressure storing unit stores, as an after-travel inflation pressure, a tire inflation pressure after start of travel of the vehicle. A comparing unit compares the after-travel inflation pressure with a lowest reference pressure. The lowest reference pressure is a tire inflation pressure immediately after start of the vehicle or a predetermined recommended inflation pressure.

Abstract: An encoding circuit is disclosed which comprises: a data-for-encoding storing register that stores n-bit data for encoding; a data-for-calculation storing register that stores m-bit data for calculation generated by shifting the data for encoding; a shifter that shifts the data for encoding stored in the data-for-encoding storing register, and shifts and inputs the shifted data into the data-for-calculation storing register; a first coefficient register that stores m-bit first coefficient data indicating a first coefficient for executing encoding; a first logic circuit that is inputted with the data for calculation stored in the data-for-calculation storing register and the first coefficient data stored in the first coefficient register and outputs the logical product for each bit of the data for calculation and the first coefficient data; and a second logic circuit that is inputted with m-bit data outputted from the first logic circuit and outputs the exclusive logical sum of the m-bit data as the encoded da

Abstract: A height controlling apparatus for controlling at least one actual height as a relative position of (a) a body of a vehicle and (b) at least one wheel of the vehicle relative to each other, the apparatus including at least one height controlling actuator which changes the at least one actual height; and an actuator control device which controls the at least one height controlling actuator so that the at least one actual height approaches at least one target height.

Abstract: A height controlling apparatus for controlling at least one actual height as a relative position of (a) a body of a vehicle and (b) at least one wheel of the vehicle relative to each other, the apparatus including at least one height controlling actuator which changes the at least one actual height; and an actuator control device which controls the at least one height controlling actuator so that the at least one actual height approaches at least one target height.

Abstract: A vehicle height adjustment device includes a vehicle height adjustment unit that changes the vehicle height at each wheel of the vehicle; a vehicle height sensor that detects the vehicle height at each wheel; a vehicle height control unit that executes the vehicle height control; a pressure sensor that detects the fluid pressure within the vehicle height adjustment unit; a control stop unit that temporarily suspends the execution of the vehicle height control if the detected pressure exceeds a threshold pressure; a road surface estimation unit that estimates the condition of a road surface over which the vehicle travels; and a control recovery unit that cancels the temporary suspension of the vehicle height control and allows the vehicle height adjustment unit to change the vehicle height if the road surface estimation unit estimates that the road surface over which the vehicle is traveling satisfies a predetermined condition.

Abstract: A memory control circuit that controls m (=L/k) memories (first to mth memories), each of which has a k-bit width, the m memories storing data having a data width (D bits) of an integral multiple of k bits up to L bits, the circuit comprising: an address input circuit that determines a memory (nth memory) storing a first k bits of the data among the m memories, based on a start-position specification address which is a predetermined j bits of an A-bit address indicating a storage destination of the data, and inputs to the nth to mth memories a first specification address for specifying a storage destination of the data, the first specification address being an A-j bits of the A-bit address, which is the A-bit address without the predetermined j bits thereof, and inputs to the first to (n?1)th memories a second specification address obtained by adding one to the first specification address; a data input circuit that inputs a plurality of pieces of divided data obtained by dividing the data into k-bit data to t

Abstract: Echo preventing circuit includes first and second FIR filters. The outputs of the first and second FIR filters are converted into first and second analog signals. An input/output terminal outputs the first analog signal or receives a third analog signal. An AD converter converts an analog signal obtained by subtracting the second analog signal from a signal formed by combining the first analog signal and the third analog signal. A response signal acquiring unit acquires a first response signal from an output of the first FIR filter to an output of the AD converter. A filter coefficient setting unit sets the filter coefficients of the second FIR filter based on the first response signal and sets the filter coefficients of the first FIR filter based on second response signal of a section from and output of the second FIR filter to an output of the AD converter.

Abstract: A filter coefficient setting device for setting a filter coefficient of an echo prevention device including a first FIR filter, and a second FIR filter, comprises: a filter coefficient initial setting portion configured to set a predetermined filter coefficient for the first and second FIR filters when the echo prevention device is started.

Abstract: An echo prevention circuit includes a filter that receives a first digital signal and outputs second and third digital signals; first and second DA converter that convert the second and third digital signals into first and second analog signals respectively; a circuit to subtract the second analog signal from a signal generated by combining the first analog signal and a third analog signal, a circuit to amplify the signal from the subtracting circuit; an AD converter that converts the amplified signal into a digital signal; a responsive signal acquiring unit to acquire a first response signal from the input of the first DA converter to the output of the AD converter and to acquire a second response signal from the input of the second DA converter to the output of the AD converter; and a unit to set filter coefficients based on the first and second response signals.

Abstract: A gas sampling bag is capable of blowing out the gas uniformly into the bag main body, and filling the bag main body with gas in a securely mixed state. A gas sampling bag that is connected to a constant volume sampling passage, contains a pipe, on which a plurality of gas inlet/outlet holes are formed, in a bag main body, and allows the gas to flow into/out of the bag main body through the gas inlet/outlet holes. The opening of the plurality of gas inlet/outlet holes is formed in such a manner that the size is minimized while the pressure loss is suppressed so as not to increase as far as possible.

Abstract: An echo preventing circuit comprises a filter that is inputted with a first digital signal and outputs a second and a third digital signals; a first DA converter that converts the second digital signal into a first analog signal and outputs the first analog signal; a second DA converter that converts the third digital signal into a second analog signal and outputs the second analog signal; an input/output terminal that outputs the first analog signal or that is inputted with a third analog signal; a subtracting circuit that outputs a fourth analog signal obtained by subtracting the second analog signal from a signal formed by combining the first analog signal and the third analog signal; and an AD converter that converts the fourth analog signal into a fourth digital signal and outputs the fourth digital signal, wherein the filter sets filter coefficients for which the fourth analog signal is a signal formed by removing or attenuating the first analog signal from a signal formed by combining the first analog

Abstract: An echo prevention circuit comprises a filter that is inputted with a first digital signal, the filter outputting second and third digital signals; a first DA converter that converts the second digital signal into a first analog signal and outputs the first analog signal; a second DA converter that converts the third digital signal into a second analog signal and outputs the second analog signal; an input/output terminal that outputs the first analog signal or that is inputted with a third analog signal; a subtracting circuit that outputs a fourth analog signal acquired by subtracting the second analog signal from a signal generated by combining the first analog signal and the third analog signal; an amplification circuit that amplifies the signal output from the subtracting circuit and outputs the amplified signal; an AD converter that converts the signal output from the amplification circuit into a digital signal and outputs the digital signal; a response signal acquiring unit that inputs a first signal to

Abstract: A filter coefficient setting apparatus that sets filter coefficients of an echo preventing circuit having a first FIR filter that is inputted with a first digital signal and that outputs a second digital signal, a second FIR filter that is inputted with the first digital signal at the same time that the first FIR filter is inputted with the first digital signal, and that outputs a third digital signal, a first DA converter that converts the second digital signal into a first analog signal and outputs the first analog signal, a second DA converter that converts the third digital signal into a second analog signal and outputs the second analog signal, an input/output terminal that outputs the first analog signal or that is inputted with a third analog signal, a subtracting circuit that outputs a fourth analog signal obtained by subtracting the second analog signal from a signal formed by combining the first analog signal and the third analog signal, and an AD converter that converts the analog signal outputted

Abstract: An echo preventing circuit comprises a filter that is inputted with a first digital signal and outputs a second and a third digital signals; a first DA converter that converts the second digital signal into a first analog signal and outputs the first analog signal; a second DA converter that converts the third digital signal into a second analog signal and outputs the second analog signal; an input/output terminal that outputs the first analog signal or that is inputted with a third analog signal; a subtracting circuit that outputs a fourth analog signal obtained by subtracting the second analog signal from a signal formed by combining the first analog signal and the third analog signal; and an AD converter that converts the fourth analog signal into a fourth digital signal and outputs the fourth digital signal, wherein the filter sets filter coefficients for which the fourth analog signal is a signal formed by removing or attenuating the first analog signal from a signal formed by combining the first analog

Abstract: An echo cancellation circuit that cancels echo generated when an earphone-microphone is used, the earphone-microphone converting an input first analog signal into voice to be output and converting input voice into a second analog signal to be output, the circuit comprising: a cancellation circuit that receives input of first and second analog signals at a first input terminal and input of a third analog signal at a second input terminal, the third analog signal being generated depending on the first analog signal to prevent the first analog signal from being output along with the second analog signal, and that cancels the first analog signal included in the first and second analog signals with the third analog signal to output the first and second analog signals with the first analog signal canceled; a first load circuit disposed between the earphone-microphone and the first input terminal; and a second load circuit corresponding to the first load circuit and a third load circuit corresponding to the impedanc