Abstract:
PURPOSE:To realize the detection which regards it as an error even when the bits of a transmitted code are all ''1'' or ''0'', by detecting an error judging from whether the remainder through division exists or not by presetting the redundant bit of the shift register of a divider circuit to which information bits and the 2nd redundant bit are transmitted. CONSTITUTION:The divider circuit consists of shift registers D0, D1...Dm-2, adders AD0, AD1...ADm-2 interposed between respective stages of registers D0...Dm-2 corresponding to coefficients of the generating polynomial, and the feedback input circuit. Now, the 1st redundant bit, which is indivisible by generating polynomial G(X), is selected and preset to registers D0...Dm-2 of the divider circuit, and the 2nd redundant bit, i.e. the remainder is added which is obtained by dividing the code of information bits and the 1st redundant bit by polynomial G(X). At the reception dide, on the other hand, the redundant bit of the shift registers of the divider circuit supplied with information bits and the 2nd redundant bit is preset and it is detected whether or not the remainder through this division exists, thereby detecting an error even when the bits of the transmission code are all ''1'' or ''0''.
Abstract:
PURPOSE:To secure a detection for such error that all bits of the code become''0'' or ''1'' when the error is detected with use of the circulation code, by adding the redundant bit to the information bit.
Abstract:
PURPOSE:To perform reproduction without A/D conversion by driving the cone with weighted pulse which has been given in accordance with bits contained in each PCM signal.
Abstract:
PURPOSE:To obtain acoustic outputs directly from PCM pulses by using a plurality of openings wherein the sum of the sectional area where air passes and the velocity of flow is weighted in reciprocation to each bit of the PCM pulses.
Abstract:
PROBLEM TO BE SOLVED: To perform communication at a high communication rate while keeping an occupant bandwidth narrow. SOLUTION: An SPU 62 of an R/W 41 performs BPSK modulation on data to be transmitted and then outputs the modulated signal to a MODEM 63. The MODEM 63 further performs ASK modulation on the modulated signal and outputs it to a loop coil 64. The loop coil 64 generates a magnetic field corresponding to the supplied modulated wave. In an IC card 1, a part of the magnetic field radiated from the R/W 41 is converted into an electric signal by a loop coil 11, generates a power source from the electric signal, and extracts data transmitted. Furthermore, when transmitting data to the R/W 41, a load of the loop coil 11 is varied in accordance with the data. The R/W 41 then detects the load variation in the loop coil 11 of the IC card 1 magnetically coupled by the loop coil 64. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PURPOSE:To perform focusing accurately and rapidly and also to prevent the deterioration of image quality. CONSTITUTION:Image information picked up by an image pickup element 2 through a lens 1 having chromatic aberration is converted into a signal and is inputted to a signal processing circuit 4 through an amplifier 3. Then it is separated into a red signal Sr, a green signal Sg and a blue signal Sb and the color signals Sr and Sb are inputted to Sr and Sb is eliminated and an amplitude value is extracted and the amplitude value is inputted to a CPU 8. The position of the lens 1 is judged by comparing respective amplitude values by the CPU 8, and then the lens 1 is moved and controlled to a position where green light LG is in the state of just-focus. In this state, red light LR and blue light LB are in a blurring state and the color signals Sr and Sb of two colors light LR and LB are corrected in terms of blurring by FIR filters 5R and 5B. Therefore this autofocusing device performs focusing accurately and rapidly and prevents the deterioration of the image quality.
Abstract:
PURPOSE:To obtain a stable clock signal by receiving reference signals different in frequency and generating the clock signal from reference signals. CONSTITUTION:A reception signal is received by a detecting diode 32 and a coupling capacitor 33, and the nonlinearity of the detecting diode 32 is used to generate a difference frequency signal between two sine wave signals S3 and S4 constituting a response request signal W3, and this difference frequency signal is amplified by a comparing circuit 35 and has the waveform shaped to generate a clock signal SCK. An address counter 13 is driven based on the clock signal SCK to read out information data S1, and the impedance of an antenna 4B is varied by an impedance varying circuit 14, and two sine wave signals S3 and S4 are reflected to transmit a response information signal W5 to an information reader 21. Thus, the stable clock signal is obtained in the simple constitution, and information data is surely detected.
Abstract:
PURPOSE:To supply a stable operation clock signal, which is a little affected by environmental noise, to an information card by supplying the operation clock signal from an external part to the information card. CONSTITUTION:When an information retrieving signal W1 is radiated from an information reading device 2 to an information card 3 in a nonoperating condition, a clock signal S2 to be included in the information retrieving signal W is taken in as a receiving signal S11 of the information card 3. The operation clock signal is extracted and an information memory 25 is read. Then, a read output information data signal S13 is received as a phase modulating signal to an information reading signal W2 by the information reading signal W2 and read as a reading signal S21. In such a way, an operation clock signal source is provided in the external part. Thus, the stable clock signal can be supplied as the operation clock signal easily to the internal part of the information card 3 and information data can be stably read from the information card 3 by comparatively simple constitution.
Abstract:
PURPOSE:To improve the titled control system in the transportation service of small-size cargo by attaching an ID tag describing cargo information to a piece of cargo, reading the tag information and managing the piece of cargo with a host computer. CONSTITUTION:A copy 2a of a check sheet 2 for a piece of cargo 1 is attached thereto and the data on the check sheet 2 is read by a bar code reader 3. An ID tag 5 is then formed and the data on it is sent to a host computer 100. The formed ID tag 5 is adhered to the piece of cargo 1. The piece of cargo 1 with the ID tag 5 is transported to a transit terminal and classified with an automatic classifier 6. At this time data on the ID tag 5 is read by a reader 7, classified and sent to a host computer 100. Simultaneously other operations are executed according to data read by the reader 7. The delivery control may be improved.