Abstract: In an information transmitting system for radio-transmitting information between a fixed station and a mobile station moved within a predetermined moving range, an antenna apparatus is provided on the fixed station side. The antenna apparatus includes a large number of unit antennas, each of which functions as an antenna. These unit antennas are mutually connected to each other, and are arranged along the moving range of the mobile station. The information is transmitted/received in a radio transmission mode between the mobile station and the fixed station via an antenna of the fixed station and the antenna apparatus.

Abstract: A communication system having a central station and a plurality of terminal stations coupled through a bi-directional communication path such that the terminals communicate with each other through the central station, has dedicated communication channels assigned to couple a terminal station with another terminal station and common communication channels simultaneously assigned to the plurality of terminal stations in a multiplexing manner. The central station has a control unit for selecting one from the dedicated communication channels and the common communication channels in response to a communication request from a terminal station.

Abstract: A method and system for supervising communications a multi-channel access communication system having a plurality of terminals connected to a plurality of communication channels. The terminals are classified into a plurality of groups each including at least one terminal. When a group calls another group, it is checked by referring to a management table if there is any terminal in communications in the called group. If there is a terminal in communications, the call is invalidated.

Abstract: In a data coding method for obtaining coded data by dividing input data into different-length division blocks, the input data is divided into different-length blocks in accordance with a distortion value indicative of an error between the input data and approximate data based on the input data; variable length quantized data is obtained by quantizing the approximate data associated with the input data of each of the blocks; status data indicative of the state in which the input data is divided into the blocks is obtained; and the coded data is obtained by combining the quantized data and the status data. When the input data is divided into a plurality of blocks of unequal lengths, the amount of the coded data is determined so that it is substantially coincident with a predetermined data amount.

Abstract: In a transmission system for bi-directionally transmitting and receiving a plurality of signals between two units, interconnected through a predetermined transmission path, if one of the plurality of signals falls into any of a transmission disabled state, a transmission not required state, a reception disabled state, and a reception not required state, at least one of a transmission operation and a reception operation for the signal in the one state is stopped or set into a stand-by state, thereby reducing electric power consumed by the transmission system. In addition, a transmission bandwidth of the transmission path is reduced by a portion associated with the signal in the one state, or an entire bandwidth for all signals except for the signal in the one state is expanded without changing the transmission bandwidth of the transmission path.

Abstract: A digital signal transmission system operates in a mode for transmitting multiplexed signals as a serial digital signal and in a mode for transmitting only a predetermined signal. A transmitter of the system includes a first control circuit which, in a particular signal transmission mode, places only a particular signal processing circuit block for transmitting a particular signal in an operative state and places in an inoperative state a multiplexer circuit block for multiplexing the predetermined signal with at least one other signal. In a multiplexed transmission mode, the first control circuit places in an operative state only the multiplexer circuit block and places in an inoperative state the particular signal processing circuit block.

Abstract: An image signal compression transmission system for transmitting and receiving a compressed image signal, having a transmitter section which entropy codes digitized image data for transmission, a transmission channel through which entropy-coded codes sent from said transmitter section are transmitted, and a receiver section which decodes said entropy-coded codes received from said transmission channel and derives an original digital image signal. In the transmitter section, digital image data is entropy coded. The entropy-coded codes are transmitted to the receiver section through the transmission channel. In the receiver section, the received codes are entropy code decoded at a decoding speed corresponding to a transmission rate on the transmission channel. Coefficient codes derived by the decoding are stored into a memory at the same speed as the decoding speed.

Abstract: In an oscilloscope having a video signal input, a video signal and the like can be monitored in addition to the normal waveform monitoring operation as the oscilloscope.

Abstract: In a radio communication device which includes at least a modulator, a power amplifier, a demodulator, and a carrier oscillator wherein an input signal to the radio communication device is corrected with a feedback demodulated signal to compensate for possible non-linear distortions in the power amplifier, a phase shift quantity for correction of the phase of the carrier which demodulates the feedback modulated signal in the demodulator is separated into a fixed phase quantity and a variable phase quantity smaller than the fixed phase quantity. The carrier is phase-corrected such that a phase shifter shifts the phase of the carrier by the fixed phase quantity and a second phase shifter shifts the phase of the carrier by the variable phase quantity smaller than the fixed phase quantity.

Abstract: A fault diagnosis method of a television camera apparatus. A fault diagnosis of a television camera apparatus is divided into a plurality of diagnosing processes, and when the result of the fault diagnosis in each fault diagnosing process is diagnosed as abnormal, the fault diagnosis of the next fault diagnosing process is not executed. A microprocessor is provided in each of a camera head and a camera control unit, and each microprocessor independently executes the fault diagnosis and transmits the result of the fault diagnosis to the other. The camera head and the camera control unit constituting the television camera apparatus are connected with each other by a transmission line, and a test signal for diagnosis generated and transmitted by the camera head is received by the camera control unit so that the test signal for diagnosis so received is compared with an expected value corresponding to this test signal so as to execute the fault diagnosis.

Abstract: A communication system having a carrier oscillator for generating a carrier of predetermined frequency, a quadrature modulator for orthogonally modulating the carrier by input baseband I and Q signals and outputting a quadrature modulation wave, and a quadrature demodulator for orthogonally demodulating the quadrature modulation wave using the carrier and outputting demodulation baseband I and Q signals. The phase of the carrier input to the quadrature demodulator is shifted by a predetermined amount in accordance with a phase shift signal. The amplitude of the demodulation baseband I and Q signals output from the quadrature demodulator is corrected on the basis of a control signal, and demodulation baseband I and Q signals thus corrected are output. The amplitude of the input baseband I and Q signals is corrected on the basis of the control signal, and the baseband I and Q signals thus corrected are input to the quadrature modulator.

Abstract: A time-divisional duplex radio communication apparatus includes the steps of adding an interrupt enable signal to the compressed voice signal in place of the time-divisional synchronizing signal at a predetermined period in a radio communication apparatus served as a calling station, functioning the period corresponding to the time-divisional synchronizing signal as a reception period without having to add the time-divisional synchronizing signal to the compressed voice signal at the next transmission period if the interrupt enable signal from the calling station is received in a radio communication apparatus served as the called station, generating the interrupt request signal a predetermined time later than the reception of the interrupt enable signal of the calling station and transmitting the interrupt request signal in the reception periods of the calling station and the called station in a radio communication apparatus served as an interrupting station, indicating occurrence of an interrupt in response

Abstract: In a digital oscilloscope for indicating an input signal waveform on a display, all or part of the circuits which constitute the oscilloscope are de-energized in accordance with at least one of an operation mode in which the digital oscilloscope has been set by the user and another mode of the oscilloscope. Alternatively, it is determined whether the digital oscilloscope is not operated for a time established by the user or more, and if it is determined that the oscilloscope is not operated for the set time or above, the display is de-energized.

Abstract: In a video signal transmission method and system wherein a signal containing a video signal is bidirectionally transmitted and received in a substantially real time in video appliances coupled via a transmission path to each other, a digital signal containing a digital video signal is time-compressed, and a transmission operation is controlled in such a manner that a transmission period and a no transmission period are alternately produced in a preselected period. Then, the time-compressed digital signal is transmitted to the transmission path during the transmission period, whereas another digital signal transmitted via the transmission path from the video appliance on the counter side is received during the no transmission period. Then, the received digital signal is time-expanded to reproduce the original signal.

Abstract: A radio relay communication system wherein a signal transmitted from active one of a plurality of radio units is received and recorded. When the transmission operation of the particular radio unit stops, the recorded signal is reproduced and transmitted by a relay unit, and another radio unit receives the signal from the relay unit. A relay start signal is transmitted from the first radio unit. and is received by the relay unit. In response to the relay start signal, the relay unit generates a sync signal of predetermined period. The first radio unit, in accordance with the reception of the sync signal, transmits an input signal as compressed to less than one half along the time axis. The relay unit alternates between the period of receiving the compressed signal and the period of transmission in synchronism with the sync signal.

Abstract: An electronic endoscope apparatus has an illumination unit for irradiating light of red, light of green and light of blue on an object for photographing in predetermined order at a predetermined period; an image signal generation unit for receiving reflection light from the object, generating a field sequential image signal on the basis of the received reflection light and delivering the field sequential digital image signal; a first memory unit for forming a predetermined look up table; a red data memory unit for storing data of a red image signal by one field; a green data memory unit for storing data of a green image signal by one field; a blue data memory unit for storing data of a blue image signal by one field, one field from the first memory unit being stored in one of the data memory unit for red, green and blue in synchronism with the order and the predetermined period of color illumination by the illumination unit; a switching unit for reading data from one of said data memory unit in synchronism wi

Abstract: The FM stereo broadcasting apparatus has a sampling frequency converter for receiving a digital input signal having an L (left audio)-signal and an R (right audio)-signal and for converting the digital input signal so that its sampling frequency is equal to either a frequency of a subcarrier of a composite audio signal or a first sampling frequency of a first sampling signal for the operation of a composite audio signal generator, a sampling signal generator for generating the first sampling signal for the operation of the composite audio signal generator having the first sampling frequency which is equal to 2.sup.

Abstract: In an apparatus for displaying image data created by a computer according to the random-scan system, until the created display data is read out and displayed, in the time of buffering a buffer memory for temporarily storing the display data, the data is divided into plural blocks based on the display coordinate information added to the display data and is thus stored. When reading the data, the data is read out and displayed in sequence from blocks adjacent to each other.

Abstract: A second object is disposed so that the image of the second object is formed within a picture area obtained by picking up an image of a first object, formed by a microscope, by an area sensor but at a different position from a first portion of the image of the first object. An area, that includes a second portion of the second object having the same focusing point as that of the first portion of the first object of which image is to be processed, is set as the area for detecting a focusing point. A video signal of the image within the focusing-point detecting area is extracted from a video signal from the area sensor, and a focusing point of the area sensor on the second portion of the second object is detected based on a differentiating element of the extracted video signal. Then, the detected focusing point is obtained as a focusing point of the area sensor on the first portion of the first object of which image is to be processed.

Abstract: Apparatus for judging the order of arrival of racers at a goal in a race and the time taken for the race, capable of storing, in a memory unit, video signals of a plurality of line sensor cameras disposed so as to be able to pick up images of moving objects from both directions with a judging criterion line between or from such angles that moving objects do not overlap, effecting scan conversion on the stored video signals of the plurality of line sensor cameras, reading resultant video signals, and displaying video signals thus read out respectively singly or simultaneously plurally on a single video monitor.