Abstract: A resolution measurement method performed by a computer device for a camera comprises: generating a distortion map which represents a correspondence relation between coordinates of all pixels of a first test chart and coordinates of all pixels of the first test chart in an image captured by a camera which causes distortion in a photography field of view; generating, according to the correspondence relation represented by the distortion map, a distorted test chart which is a distorted image of a second test chart that is used for measuring resolution at a specific area in the first test chart in the captured image and performing, by using the distorted test chart, measurement of resolution according to a contrast method at a part, that corresponds to the specific area, in the photography field of view of the camera.

Abstract: To generate training data based on normal content and anomalous content generated from the normal content. A training data generation method for generating training data used for generating a learned model for determining whether there is an anomaly in an inspection target, the training data generation method including: receiving normal content regarding the inspection target and anomalous content generated from the normal content; and generating training data based on a set of the normal content and one or more pieces of the anomalous content.

Abstract: A marker generating method is provided for facilitating the finding of positions which correspond to one another among a plurality of images associated with a video signal. A position within an image (800) associated with a video signal is selected, with a cursor (802, 804) to display a marker (812, 822-826) at a position corresponding to the selected position, in a different image (810, 820) associated with the video signal.

Abstract: A jitter-associated data generator is provided for generating data associated with jitter. The jitter-associated data generator comprises a first circuit, a second circuit, and a third circuit. The first circuit generates an output including frequency components in a first frequency band common to first and second jitter, from a received digital input, as digital data associated with first jitter. The second circuit generates an output including frequency components in a second frequency band corresponding to the difference between the first and second jitter, from the received input, as differential digital data. The third circuit generates an output including frequency components in a third frequency band including the first and second frequency bands, from the received first jitter-associated digital data and differential digital data, as digital data associated with the second jitter.

Abstract: A marker generating method is provided for facilitating the finding of positions which correspond to one another among a plurality of images associated with a video signal. A position within an image (800) associated with a video signal is selected, with a cursor (802, 804) to display a marker (812, 822-826) at a position corresponding to the selected position, in a different image (810, 820) associated with the video signal.

Abstract: A jitter-associated data generator is provided for generating data associated with jitter. The jitter-associated data generator comprises a first circuit, a second circuit, and a third circuit. The first circuit generates an output including frequency components in a first frequency band common to first and second jitter, from a received digital input, as digital data associated with first jitter. The second circuit generates an output including frequency components in a second frequency band corresponding to the difference between the first and second jitter, from the received input, as differential digital data. The third circuit generates an output including frequency components in a third frequency band including the first and second frequency bands, from the received first jitter-associated digital data and differential digital data, as digital data associated with the second jitter.

Abstract: A test signal generator 2 comprises a Pseudo Random Binary bit Sequence generator 20 for generating a Pseudo Random Binary bit Sequence in the form of burst while holding the continuity of the code, and intermittently operates in a burst form in response to operation control signals from circuits 22, 24. During one burst duration, a string of Pseudo Random Binary bit Sequence is generated in a certain sequence, where the first codes in the Pseudo Random Binary bit String generated in this burst duration follows the last code of a Pseudo Random Binary bit String generated in the preceding burst duration.

Abstract: A multi-phase signal generating apparatus is provided for readily generating multiple phase signals. The multi-phase signal generating apparatus comprises a signal data storage which stores a plurality of data segments for determining a predetermined period of one signal. A data segment selector circuit selects segments for constituting the phase signals from a plurality of data segments stored in the signal data storage for determining the predetermined period of a signal in each of a plurality of segment intervals which make up a phase signal cycle for generating a phase signal. Each phase signal generator circuit forms each phase signal using a plurality of selected segments for each phase signal during a plurality of segment intervals.

Abstract: A system for measuring electric field strength of radio waves transmitted from cell station and arriving at an arbitrary measuring location is provided that includes a tuner unit, cell station ID (CS-ID) demodulator unit, signal level (or electric field strength) detector (RSSI detector), memory unit, display unit, and controller (CPU). CS-ID codes included in radio waves from cell stations and transmitted to an arbitrary measuring location are detected by the demodulator unit, and electric field strength (RSSI) data of the received radio waves are detected by the RSSI detector. All sets of the CS-ID and RSSI data are stored at addresses in the memory unit corresponding to each of the measuring locations, and the stored sets of the CS-ID data and RSSI data are read from the memory unit and displayed on the display unit in association with information indicative of the measuring location.

Abstract: A signal waveform display system for displaying waveforms of one or two input signals on a display screen is provided which comprises first-third input switching circuits, first and second trigger generators, first and second horizontal sweep generators, and a composite horizontal sweet generator. The trigger generators respectively generates first and second trigger pulses synchronously with the input signals provided thereto through the first and second input switching circuits. The sweep generators are triggered by the trigger pulses and generate first and second sweep signals having variable time periods, respectively. The composite sweep generator generates a composite sweep signal including lower portions of the first sweep signal which are smaller than a reference voltage, and upper portions of the second sweep signal which are higher than the reference voltage.

Abstract: A compensating method and apparatus is provided which collectively compensates for variations in a variety of characteristics in respective circuit portions of a signal processing circuit. A correction data generator is provided for generating correction value data for correction to be made for an output signal of the signal processing circuit, in order to compensate for variations in the characteristics of the at least one circuit portion. Also, a compensator is connected to receive an output signal from the signal processing circuit as well as to receive the correction value data from the correction data generating means, for correcting the output signal in accordance with the respective correction value data corresponding to the at least one circuit portion to generate a compensated output signal.

Abstract: A battery holder incorporated in an electrical device is provided which includes a housing for holding a battery which supplies a voltage to electrical circuits of the device. The battery holder contains positive and negative side contacts fixed to the housing for connecting positive and negative electrodes of the battery to supply a voltage to electrical loads. The positive side contact includes a back plate fixed to the housing, a conductive contact plate for contacting the positive electrode of the battery, the contact plate forming a U-shaped or V-shaped spring together with the back plate, and at least two protective plates of an insulation material arranged along the outer periphery of the contact plate and protruding from it. The distance between the protective plate is defined to be larger than the diameter of the positive electrode of the battery and smaller than the diameter of the battery itself.

Abstract: An evaluator for evaluating a digital transmission system is provided which comprises a signal power decrease detector and a system margin evaluator. The signal power decrease detector receives a digital signal which has been transmitted through the transmission medium of a transmission system so as to generate a signal power decrease signal. The system margin evaluator evaluates the system margin of the transmission system in response to the signal power decrease signal. The system margin of the digital transmission system can be evaluated in a simple and convenient manner.

Abstract: An apparatus for displaying a waveform of an input signal on a display includes a synchronization detecting circuit, a sweep generating circuit, a horizontal axis drive circuit, a switching circuit, a variable gain amplifier, a vertical axis drive circuit, and a vertical location arrangement circuit. The horizontal axis drive circuit drives the horizontal axis of the display on the basis of a sweep signal generated at the sweep generating circuit synchronously with a sweep trigger signal obtained by dividing synchronization detecting pulses from the synchronization detecting circuit by N (N-1, 2, . . . ). The switching circuit alternately transfers the input signal and a cursor signal at a high rate to provide a multiplexed input/cursor signal to the vertical axis drive circuit through the variable gain amplifier.

Abstract: A flow display type indicator is provided which indicates the variation or the velocity of variation of the value of a physical quantity or a parameter in a readily identifiable form. The indicator includes a flow image forming unit to indicate the value of the predetermined physical quantity in a flow representation by enabling a flow representing image to be formed at one of a plurality of positions including first to n-th positions which are orderly disposed and offset from each other along a predetermined line. A flow image selector selects one from flow representing images at the first to the n-th positions in one of first and second directions depending on the polarity of an input signal at a speed in accordance with the magnitude of the input signal to allow the flow representing image forming unit to form a selected flow representing image.

Abstract: The apparatus for displaying a clamp point on a screen includes an input amplifier; a clamp circuit which includes a sync separation circuit and a one shot; and a blanking circuit. The video signal is applied to the clamp circuit via the input amplifier and the output signal therefrom is applied to the blanking circuit to be modulated with respect to its brightness. Thus, the brightness-modulated clamp point is readily located on a screen of, for example, an oscilloscope.

Abstract: An apparatus and method for generating a linearly filtered composite signal, wherein the original signal of said composite signal can be divided into a plurality of sequentially arranged original sub-signals. The apparatus having a plurality of memory (1.sub.1, 1.sub.2) which have stored filtered sub-signals y.sub.1 (n), y.sub.2 (n) obtained by linearly filtering the original sub-signals, respectively; an adder (5) for adding data of the sub-signals y.sub.1 (n), y.sub.2 (n) read out from the memory to provide the resultant data y.sub.1 (n)+y.sub.2 (n) to an output terminal of the apparatus; and a controller for controlling timings of providing the data of the sub-signals stored in the memory to the adder.

Abstract: An apparatus for displaying line and frame waveforms having different time-scales of a video signal on a display screen is described which comprises complex sweep signal generating means including a line sweep signal generating circuit 2, a frame sweep signal generating circuit 3 and a switching circuit 4, and horizontal axis drive circuit including a horizontal location arrangement circuit 5 and a horizontal axis drive circuit 6. The line and frame sweep signal generating circuits 2 and 3 generate line and frame sweep signals S.sub.2 and S.sub.3 synchronously with line and frame synchronization signals of the video signal, respectively, and the switching circuit 4 alternatively transfers the line and frame sweep signals S.sub.2 and S.sub.3, synchronously with the frame synchronization signal to generate a complex sweep signal S.sub.4.

Abstract: A digital phase shifter is provided which uses a direct digital synthesizer. The digital phase shifter is provided with a digital phase-shifted waveform signal generator in which a plurality of digital phase-shifted waveform signals having different phase shifts are stored. The generator outputs a digital phase-shifted waveform signal corresponding to a specified phase shift from a phase shift specifying section in synchronism with an oscillation signal from a PLL circuit. The output is converted to an analog form by a D/A convertor to generate a phase-shifted waveform.

Abstract: A measuring apparatus is provided which is capable of measuring CN ratio. The measuring apparatus has a measuring band specifying unit for specifying a band under measurement; a display for displaying the spectrum of levels measured in the specified band; first and second noise measuring frequency specifying units; a transmission channel selector; and a CN ratio calculating unit for estimating a noise level at a carrier of a selected transmission channel and for calculating the CN ratio using the estimated level.