Abstract: An acoustic device 3 includes a piezoelectric element and a housing 30. The housing 30 includes a main body portion 31 and a rib portion 35. The main body portion 31 includes a vibrating portion 32 and a plurality of support portions 33. The rib portion 35 is connected to the main body portion 31. The rib portion 35 extends in a third direction between a pair of the support portions 34a and 341) facing each other and separated from each other in the third direction intersecting a second direction, when viewed from the second direction along a vibrating surface. A hollow region V is defined by the vibrating portion 32 and the plurality of support portions 33, The above opening S1 is defined by the rib portion 35 and the main body portion 31 and communicates with the hollow region V. The rib portion 35 covers the middle of the hollow region V when viewed from the second direction.

Abstract: A maintenance device includes: a cap detachably contactable with a nozzle face of a liquid discharge head; a suction device to suck liquid from the cap; a waste liquid storage to store the liquid sucked from the cap by the suction device; a waste liquid channel connecting the cap and the waste liquid storage; a cleaning liquid storage storing a cleaning liquid to be supplied to the cap; and a cleaning liquid channel connecting the cap and the cleaning liquid storage. The suction device sucks: the waste liquid in the cap to discharge the waste liquid to the waste liquid storage through the waste liquid channel; and the cleaning liquid in the cleaning liquid storage to supply the cleaning liquid to the cap through the cleaning liquid channel.

Abstract: An embroidery device includes a needle including a hole through which a thread has been passed, a dyeing unit configured to dye the thread in different colors, an embroidery unit configured to move the needle to perform a sewing process on a medium with the thread dyed in the different colors by the dyeing unit, and a remover configured to remove the linear member in a vicinity of the needle.

Abstract: An embroidery device includes a needle including a hole through which a thread has been passed, a dyeing unit configured to dye the thread in different colors, an embroidery unit configured to move the needle to perform a sewing process on a medium with the thread dyed in the different colors by the dyeing unit, and a remover configured to remove the linear member in a vicinity of the needle.

Abstract: A drive circuit for an inkjet recording head includes a plurality of electrically capacitive actuator elements, a drive signal source, a plurality of switching elements, and a plurality of resistances. The actuator elements are provided for a plurality of nozzles, and drive the nozzles to eject ink therefrom. The drive signal source outputs a drive signal for driving the actuator elements. The switching elements are connected to the respective actuator elements to separately drive the actuator elements, and selectively apply the output drive signal to the actuator elements. The resistances are provided for the respective actuator elements, and are connected to low potential sides of the actuator elements. Each of the resistances has a resistance value adjusted in accordance with the length of a wire between the corresponding one of the actuator elements and the drive signal source.

Abstract: A tone determination device, which determines the tonality of an input signal, is capable of reducing calculation complexity. Therein a frequency conversion unit (101) converts the frequency of an input signal; a downsampling unit (102) carries out shortening processing which shortens the vector series length of the frequency-converted signal; a constancy determination unit (107) determines the constancy of the input signal; depending on the constancy of the input signal, a vector selection unit (104) selects either the vector series of the post-frequency conversion signal or the vector series after the shortening of the vector series length; a correlation analysis unit (105) uses the vector series selected by the vector selection unit (104) to obtain correlations; and a tone determination unit (106) uses the correlations to determine the tonality of the input signal.

Abstract: An image forming device includes a liquid discharge head including piezoelectric elements; a drive waveform generating unit that outputs a drive waveform; a selection unit that applies the drive waveform to the piezoelectric elements; a resonant frequency adjusting circuit that is connected in parallel with the piezoelectric elements; a switch unit that switches the resonant frequency adjusting circuit; and a switching control unit that causes the switch unit to switch in accordance with a first number of simultaneously driven piezoelectric elements. When the first number of the simultaneously driven piezoelectric elements is greater than a predetermined number, the switching control unit connects the resonant frequency adjusting circuit, so that a resonant frequency of a closed loop becomes lower than a resonant frequency of the closed loop when the first number of the simultaneously driven piezoelectric elements is less than the predetermined number.

Abstract: An LSP vector quantization device able to improve the precision of quantization in vector quantization where a codebook for first stage vector quantization is switched according to the type of a feature that has a correlation with the quantization target vector.

Abstract: A vector quantizer which improves the accuracy of vector quantization in switching over a vector quantization codebook on a first stage depending on the type of feature having the correlation with a quantization target vector. In the vector quantizer, a classifier generates classification information representing a type of narrowband LSP vector having the correlation with wideband LSP (Line Spectral Pairs) of the plural types. A first codebook selects one sub-codebook corresponding to the classification information as a codebook used for the quantization of the first stage from plural sub-codebooks corresponding to each of the types of narrowband LSP vectors. A multiplier multiplies the quantization residual vector of the first stage inputted from an adder by a scaling factor corresponding to the classification information of plural scaling factors stored in a scaling factor determiner and outputs it to an adder as the quantization target of a second stage.

Abstract: A drive circuit for an inkjet recording head includes a plurality of electrically capacitive actuator elements, a drive signal source, a plurality of switching elements, and a plurality of resistances. The actuator elements are provided for a plurality of nozzles, and drive the nozzles to eject ink therefrom. The drive signal source outputs a drive signal for driving the actuator elements. The switching elements are connected to the respective actuator elements to separately drive the actuator elements, and selectively apply the output drive signal to the actuator elements. The resistances are provided for the respective actuator elements, and are connected to low potential sides of the actuator elements. Each of the resistances has a resistance value adjusted in accordance with the length of a wire between the corresponding one of the actuator elements and the drive signal source.

Abstract: An image forming device includes a liquid discharge head including piezoelectric elements; a drive waveform generating unit that outputs a drive waveform; a selection unit that applies the drive waveform to the piezoelectric elements; a resonant frequency adjusting circuit that is connected in parallel with the piezoelectric elements; a switch unit that switches the resonant frequency adjusting circuit; and a switching control unit that causes the switch unit to switch in accordance with a first number of simultaneously driven piezoelectric elements. When the first number of the simultaneously driven piezoelectric elements is greater than a predetermined number, the switching control unit connects the resonant frequency adjusting circuit, so that a resonant frequency of a closed loop becomes lower than a resonant frequency of the closed loop when the first number of the simultaneously driven piezoelectric elements is less than the predetermined number.

Abstract: A tone determination device, which determines the tonality of an input signal, is capable of reducing calculation complexity. Therein a frequency conversion unit (101) converts the frequency of an input signal; a downsampling unit (102) carries out shortening processing which shortens the vector series length of the frequency-converted signal; a constancy determination unit (107) determines the constancy of the input signal; depending on the constancy of the input signal, a vector selection unit (104) selects either the vector series of the post-frequency conversion signal or the vector series after the shortening of the vector series length; a correlation analysis unit (105) uses the vector series selected by the vector selection unit (104) to obtain correlations; and a tone determination unit (106) uses the correlations to determine the tonality of the input signal.

Abstract: An LSP vector quantization device able to improve the precision of quantization in vector quantization where a codebook for first stage vector quantization is switched according to the type of a feature that has a correlation with the quantization target vector.

Abstract: Disclosed is a tone determination device that determines the tonality of an input signal using correlations between the frequency components of a current frame with the frequency components of the preceding frame, such that the tone determination device is able to decrease the calculation complexity. In the device, a vector coupling unit (104) couples some of the SDFT coefficients of the preceding frame with some of the down-sampled SDFT coefficients of the preceding frame to generate new SDFT coefficients, and also couples some of the SDFT coefficients of the current frame with some of the down-sampled SDFT coefficients of the current frame to generate new SDFT coefficients. A correlation analysis unit (105) finds correlations for the SDFT coefficients between frames, and also finds the power of the current frame for each specific band.

Abstract: A vector quantizer which improves the accuracy of vector quantization in switching over a vector quantization codebook on a first stage depending on the type of feature having the correlation with a quantization target vector. In the vector quantizer, a classifier (101) generates classification information representing a type of narrowband LSP vector having the correlation with wideband LSP (Line Spectral Pairs) out of the plural types. A first codebook (103) selects one sub-codebook corresponding to the classification information as a codebook used for the quantization of the first stage from plural sub-codebooks (CBa1 to CBan) corresponding to each of the types of narrowband LSP vectors.

Abstract: It is an object of the present invention to provide a relay device, a communication terminal, a signal decoder, a method for processing a signal, and a program for processing a signal, which make it possible to achieve a multi-party communication system capable of preventing a significant deterioration of the quality of a sound obtained by decoding a speech/audio signal without increasing a cost for processing, as compared with the conventional communication terminals, the conventional communication techniques, and the like.