摘要:
A plurality of identification information is stored in advance in a memory device. Specific identification information stored in the memory is compared with identification information entered by the owner of an IC card. If the comparison result shows coincidence between the compared information, the owner enters another item of identification information. This information is compared with the corresponding identification data prestored in the memory. If the comparison result shows coincidence between them, it is then determined that the holder of the IC card is the rightful owner.
摘要:
In an integrated circuit for transcoder, a substractor generates a signal representing a difference between an input speech signal and a prediction signal. This signal is transferred to a quantizing unit. The unit quantizes an output signal from the subtractor, and generates a predictive encoded signal. An inverse quantizing unit generates a difference signal. A predictor filter generates the prediction signal to be supplied to the subtractor. A signal path changing unit made up of electronic switches respondes to a mode select signal to suitably change an electric connection among the subtractor, the quantizing unit and the reverse quantizing unit, whereby the integrated circuit device can function as and ADPCM encoder or an ADPCM decoder.
摘要:
An electronic musical instrument is provided of the type in which a musical tone signal is formed by executing computations according to a mathematical formula such as a frequency modulation formula. Tone formation of each of musical tone signals to be simultaneously formed is assigned to each time-division-multiplexed time channel which is cyclically repeated over cycles of a plurality of time slots. A computation for forming each single musical tone is divided into a plurality of sub-computations, and those sub-computations are executed respectively using a plurality of cycles of time slots of each single time channel. Thus tone formation according to a complex computation formula is realized. Parameters necessary for the computation are generated respectively for each time slot so that any computational formula is adopted as desired by selecting predetermined parameters for each time slot.
摘要:
In an integrated circuit for transcoder, a subtractor generates a signal representing a difference between an input speech signal and a prediction signal. This signal is transferred to a quantizing unit. The unit quantizes an output signal from the subtractor, and generates a predictive encoded signal. An inverse quantizing unit generates a difference signal. A predictor filter generates the prediction signal to be supplied to the subtractor. A signal path changing unit made up of electronic switches responds to a mode select signal to suitably change an electric connection among the subtractor, the quantizing unit and the reverse quantizing unit, whereby the integrataed circuit device can function as an ADPCM encoder or an ADPCM decoder.
摘要:
Data for each sample point amplitude values of a desired waveshape is expressed in mantissa and exponent in accordance with a floating-point representation. The desired waveshape is divided into a plurality of frames along a time axis and the exponent data is common in each individual one of said frames which includes a plurality of sample points. The number of the frames is much smaller than the number of all sample points. In this waveshape memory, the mantissa data corresponding to the respective sample points are stored in a first memory, and exponent data corresponding to the respective frames are stored in a second memory.
摘要:
A smoothing method for a magnetic recording media eliminates a gravure pattern therein and a device therefor includes a belt like conveyer running together with a nonmagnetic sheet or tape at the same speed applied above a smoothing device. Many magnets are disposed underneath the conveyer to affect the magnetic field of the magnetic head applied to the magnetic recording solution to orient easily the magnetization axes of the magnetic particles of the magnetic recording solution. The magnets are positioned in various arrangement to increase the effect of the smoothing method. Also, a nonwoven fabric is used in place of the belt like conveyor to decrease friction and remove dust out of the magnetic recording media. Thus, the quality of the final products is much more highly improved than that of conventional products.
摘要:
A thick film circuit board comprises at least parts of SiC substrate at which a thick film resistor is provided being coated with a glass layer having a good adhesion to the SiC substrate and the same or similar coefficient of thermal expansion as or to that of the SiC substrate, and no swelling, cracking and peeling appear on the thick film resistor and no electroconductive component is formed on laser-trimmed parts of the thick film resistor.
摘要:
An electronic musical instrument includes a keyboard having keys, an optical disc memory which is low-speed in access and very large in capacity, a semiconductor memory which is high-speed in access and very small in capacity, and readout circuit. The semiconductor memory stores an initial portion corresponding to a short period from the start of a tone waveshape. The optical disc memory stores a remaining portion succeeding the initial portion in the tone waveshape. The readout circuit starts to read out the initial portion and the remaining portion at the same time in response to a key depression. The short period is in advance determined so as to be equal to or longer than an access time required to read out the first data of the remaining portion. Therefore, the initial portion is firstly read out and thereafter the remaining portion is read out, so that the low-speed accessibility of the optical disc memory is compensated with the high-speed accessibility of the semiconductor memory.
摘要:
An electronic musical instrument of a polyphonic type comprises, first tone generating means capable of producing, in a first musical tone property, a plurality of musical tones respectively corresponding to a plurality of depressed keys, and further comprises second tone generating means capable of producing, in a second musical tone property, a musical tone corresponding to a specific key selected from said depressed keys in accordance with a predetermined standard of selection. The first musical tone property is set to be suitable for ensemble performance, whereas the second musical tone property is set to be suitable for solo performance. Among the musical tones produced by the first tone generating means, the one corresponding to the specific key is made less prominent than the ones corresponding to the other depressed keys.
摘要:
This electronic musical instrument with automatic accompaniment system comprises means for dividing each note by time division timing, means for extracting a timing equivalent to the order indicated by pattern signals from the timings corresponding to the predetermined note, and means for producing a musical tone of note corresponding to the extracted timing. The automatic accompaniment system may be applied for automatic arpeggio performance.