Abstract: Provided is a sound source module capable of inclining and capable of being easily attached and detached by a simple structure. A sound source module 10 includes engaging portions 40 and 48 provided spaced from each other on both ends of an edge portion 14 in a longitudinal direction. A keyboard module 50 is removably engaged by the engaging portions 40 and 48. Thus, the sound source module 10 can be easily attached to and detached from the keyboard module 50. The engaging portions 40 and 48 are located on the same straight line. Thus, by a front portion 11 being supported in an inclined state relative to the keyboard module 50 with the engaging portions 40 and 48 as an axis, the sound source module 10 can be inclined relative to the keyboard module 50.

Abstract: A fingerprint authentication device includes: a fingerprint acquisition section that acquires fingerprint image data; a fingerprint image correction processing section that corrects a pixel value by using a correction coefficient for making a first pixel value of the brightest pixel in a group of pixels at which an integrated value of a number of pixels at a dark portion side in a histogram becomes a predetermined proportion with respect to an integrated value of a number of all pixels, be a brighter second pixel value; a spectral data generation section that generates a spectral data matrix including directions of ridges of a fingerprint and a frequency of the fingerprint; a registered spectral data matrix archive section that archives a registered spectral data matrix; a fingerprint verification section that verifies the spectral data matrix and the registered spectral data matrix; and an authentication results output section that outputs results of authentication.

Abstract: The present invention relates to a battery storage structure for acoustic equipment having a housing and a battery-driven speaker disposed on the housing, the battery storage structure for storing a battery in the housing. A case storage section is disposed in the housing and has an open surface. A battery case has an open surface and is stored within the case storage section, wherein the open surface of the battery case is oriented in the same direction as the open surface of the case storage section. At least one connection section connects the battery case and the case storage section, wherein a predetermined gap is formed between an inner bottom surface of the case storage section and an outer bottom surface of the battery case, and between an inner side surface of the case storage section and an outer side surface of the battery case.

Abstract: A fingerprint authentication device includes: a fingerprint acquisition section that acquires fingerprint image data; a fingerprint image correction processing section that corrects a pixel value by using a correction coefficient for making a first pixel value of the brightest pixel in a group of pixels at which an integrated value of a number of pixels at a dark portion side in a histogram becomes a predetermined proportion with respect to an integrated value of a number of all pixels, be a brighter second pixel value; a spectral data generation section that generates a spectral data matrix including directions of ridges of a fingerprint and a frequency of the fingerprint; a registered spectral data matrix archive section that archives a registered spectral data matrix; a fingerprint verification section that verifies the spectral data matrix and the registered spectral data matrix; and an authentication results output section that outputs results of authentication.

Abstract: The present invention relates to a battery storage structure for acoustic equipment having a housing and a battery-driven speaker disposed on the housing, the battery storage structure for storing a battery in the housing. A case storage section is disposed in the housing and has an open surface. A battery case has an open surface and is stored within the case storage section, wherein the open surface of the battery case is oriented in the same direction as the open surface of the case storage section. At least one connection section connects the battery case and the case storage section, wherein a predetermined gap is formed between an inner bottom surface of the case storage section and an outer bottom surface of the battery case, and between an inner side surface of the case storage section and an outer side surface of the battery case.

Abstract: The decoder includes a memory to store the jump time for a seek operation. The decoder affords frame numbers to the frames and saves in the memory the current frame number of a frame being read out. The decoder saves a frame number of a jump destination calculated on the basis of the current frame number and the jump time as read out from the memory. The decoder reverts to the header on a seek operation accepted, and affords provisional frame numbers to the frames. The decoder further decodes the compressed data from the frame following the frame the provisional frame number of which coincides with the frame number of the jump destination, in fast feed, or from the frame following the frame the provisional frame number of which coincides with a frame number by one before the frame number of jump destination, in rewind.

Abstract: A compressed audio file player for replaying an audio file including basic data streams in any location includes a size calculator calculating an average size of the basic data streams, a computational circuit calculating a logical location of each basic data stream and a location memory storing location subtraction data, which shows a difference between the relative location and the logical location of each basic data stream and a location finder calculating a location of the audio file to be replayed from the location subtraction data of the basic data stream to be replayed and the logical location of the basic data stream to be replayed, in response to the instruction.

Abstract: The decoder includes a memory to store the jump time for a seek operation. The decoder affords frame numbers to the frames and saves in the memory the current frame number of a frame being read out. The decoder saves a frame number of a jump destination calculated on the basis of the current frame number and the jump time as read out from the memory. The decoder reverts to the header on a seek operation accepted, and affords provisional frame numbers to the frames. The decoder further decodes the compressed data from the frame following the frame the provisional frame number of which coincides with the frame number of the jump destination, in fast feed, or from the frame following the frame the provisional frame number of which coincides with a frame number by one before the frame number of jump destination, in rewind.

Abstract: In order to control efficiently a flash memory in the case where small-scale data are frequently rewritten, a method of controlling a flash memory in which a data storage region is divided into unit sectors and data can be erased by every sector as a unit, is configured that the sector comprises a sector control region and a plurality of pages, and included are both available/unavailable flag information about the page concerned and an occupied/unoccupied map showing a data storage location of the data storage region on the page concerned. By employing such a configuration, it is easy to decide whether the page referred to is available or unavailable and the configuration is suitable for frequently renewing and adding pages, which are of a large quantity and on a small scale.

Abstract: A micro-controller is connected to an external circuit via an address bus and a read control signal line. The external circuit includes an enable circuit, a decoder and a register group. The enable circuit produces an enable signal from the sixteenth bit of 16-bit information on the address bus and a control signal on the read control signal line. The decoder creates an address from the ninth to fifteenth bits of the 16-bit information. When the enable signal is valid, the register group writes a signal value of the first to eighth bits of the 16-bit information into a register specified by the address. Accordingly, the micro-controller can send the read control signal, the register address and the register data to the external circuit via the address bus. It is therefore possible to write data into the external circuit without using a write control signal line.

Abstract: In order to control efficiently a flash memory in the case where small-scale data are frequently rewritten, a method of controlling a flash memory in which a data storage region is divided into unit sectors and data can be erased by every sector as a unit, is configured that the sector comprises a sector control region and a plurality of pages, and included are both available/unavailable flag information about the page concerned and an occupied/unoccupied map showing a data storage location of the data storage region on the page concerned. By employing such a configuration, it is easy to decide whether the page referred to is available or unavailable and the configuration is suitable for frequently renewing and adding pages, which are of a large quantity and on a small scale.

Abstract: A micro-controller is connected to an external circuit via an address bus and a read control signal line. The external circuit includes an enable circuit, a decoder and a register group. The enable circuit produces an enable signal from the sixteenth bit of 16-bit information on the address bus and a control signal on the read control signal line. The decoder creates an address from the ninth to fifteenth bits of the 16-bit information. When the enable signal is valid, the register group writes a signal value of the first to eighth bits of the 16-bit information into a register specified by the address. Accordingly, the micro-controller can send the read control signal, the register address and the register data to the external circuit via the address bus. It is therefore possible to write data into the external circuit without using a write control signal line.