Abstract: A magnetic recording/reproducing apparatus has a chassis, a rotary cylinder mounted on the chassis, and at least one guide base movably disposed around the rotary cylinder. The guide base is provided with a guide member for drawing out a magnetic tape from a tape cassette. The guide member draws out the magnetic tape from the tape cassette, as the guide base is being moved, and winds the magnetic tape around the rotary cylinder so that a predetermined tape passage is defined. The magnetic recording/reproducing apparatus further has a capstan mechanism for driving the magnetic tape to run the same. The capstan mechanism is arranged on the same side of the chassis on which the rotary cylinder is disposed, and has a capstan downwards extending toward the chassis to come into direct contact with the magnetic tape.

Abstract: A video imaging apparatus changes an area of an imaging element (CCD or MOS type) from which a signal is read out as a TV signal. A normal transfer speed is used to read out the signal from the area as the TV signal and a high transfer speed is used to read out a signal from other area so that smooth movement of an image can be attained.Further, when movement of a video camera occurs, the movement can be judged by observation through a view finder, that is, which partial area of the whole area of the imaging element is produced as the TV signal can be recognized.

Abstract: The digital convergence correction device is used for a projection-type television receiver having a Braun tube with an aspherical surface fluorescent screen and a projection lens system with an aspherical surface plastic lens attached to the display screen of th Braun tube. In the digital convergence correction device, a digital memory stores digital correction data corresponding to correction values at the convergence adjustment points on the display screen that is divided in the horizontal and vertical directions. A multiplexer reads the digital correction data out of the digital memory, and implements the time division multiplexing for the data. A D/A converter receives the multiplexed data from the multiplexer, and converts it into an analog signal. The device is provided with sample-holding circuits for making coincident timing for the outputs of the time division multiplexing process, so that no phase shift arises at the time division process and multi-channel time division process is made possible.

Abstract: An image pickup apparatus is provided with a first adder which outputs a sum signal by adding a first luminance signal produced from the signals of odd-numbered lines of a solid-state image sensor and a second luminance signal produced from the signals of even-numbered lines of the solid-state image sensor, a first subtracter which outputs a difference signal by subtracting the first luminance signal from the second luinance signal, a noise reducer which reduces noise in the difference signal, a second adder which outputs a third luminance signal by adding the difference signal with its noise reduced to the sum signal, and a second subtracter which outputs a fourth luminance signal by subtracting the difference signal with its noise reduced from the sum signal. A frame still picture is formed from the third luminance signal and fourth luminance signal.

Abstract: In a digital video signal processing circuit where digital composite video signals are inputted and processed in separation into a luminance signal and a chrominance signal, the digital video signal processing circuit is provided with a device for separating a first frequency component including a luminance signal in a relatively low region from the digital composite video signals, a device for separating a second frequency component including a luminance signal in the vicinity of a color subcarrier and a chrominance signal, a line comb-shaped filter for separating the second frequency component into the luminance signal in the vicinity of the color subcarrier and the chroninance signal, an adding device for adding the first frequency component and the luminance signal in the vicinity of the color subcarrier, a phase inversion device for inverting the phase of the chrominance signal, and an adding device for adding the chrominance signal in phase inversion to the first frequency component or the luminance sig

Abstract: A video signal processing circuit capable of enlarging and displaying a picture and adapted for use in an apparatus in which a desired picture is selected, and a video signal representative of the desired picture under interlaced scanning is received, stored in a memory and processed to provide an enlarged video signal, comprises includes a real signal/interpolated signal preparation circuit for preparing, from the stored video signal, new scanning lines for an image to be enlarged, and a memory processing circuit having switching control function to store an output signal of the real signal/interpolated signal preparation circuit in a memory, read the video signal out of the memory at a period different from a period at which the output signal is stored in the memory, and delay a read-out signal by one or more fields so that an enlarged signal is delivered.

Abstract: A clock pulse generator has a first clock pulse generator for generating a burst lock clock pulse signal synchronized with a color burst signal contained in a video signal; a second clock pulse generator for generating a line lock clock pulse signal synchronized with a horizontal synchronizing signal contained in the video signal; a detection circuit for detecting whether or not the video signal is a standard signal; and a phase control circuit for synchronizing the phase of the line lock clock pulse signal with the phase of the burst lock clock pulse signal when the detection circuit determines that the video signal is a standard signal.

Abstract: A horizontal deflection circuit comprising a horizontal output transistor, and a drive circuit is connected between the base and the emitter of the horizontal output transistor to supply a base drive voltage to the horizontal output transistor in order to control the conduction between the collector and the emitter of the horizonal output transistor, wherein first and second switching means are provided in parallel between the base of the horizontal output transistor and the drive circuit (or between the emitter of the horizontal output transistor and the drive circuit), the first switching means permitting only the current to flow from the base of the horizontal output transistor to the drive circuit (or from the drive circuit to the emitter of the horizontal outut transistor) and the second switching means being conductive only during the conductive period of the horizontal output transistor.

Abstract: A digital convergence correcting device effecting convergence correction by using convergence correcting data stored in a memory which includes an address fixing device which, in the case where convergence correcting data are insufficient, reads out in succession the correcting data corresponding to the last horizontal scanning line for the portion lacking in the data so that the correcting data are used repeatedly, and which, in the case where convergence correcting data are excessive, only necessary convergence correcting data are used.

Abstract: A waveform equalization method whereby a transversal filter having 5 or more tapes is included, and a difference signal output, which is obtained when an isolated impulse response waveform of a digital modulated signal is inputted to the above described filter and the output of the filter is inputted to an adder, is allowed to have intersymbol interference at .+-.T/2 with respect to the central axis time and has zero outputs at .+-.nT/2 (where n.gtoreq.2 and n is an integer).

Abstract: An arc cam member has a guide groove formed on its underside along its arced length. On its outer circumference, the cam member is provided with a first cam portion. A second cam portion is formed in the wall of the guide groove of the cam member. The ends of a first arm and a second arm are placed in contact with the first and second cam portions respectively. As the cam member is rotated, the first and second arms move, following the shapes of the first and second cam portions. The motion of the first and second arms is used to operate the recording and reproducing apparatus.

Abstract: A convergence correcting apparatus is used in a projection television receiver including a CRT having an aspherical fluorescent screen and a projection lens apparatus which is attached to the display screen of the CRT and has aspherical plastic lenses. In the digital convergence correcting apparatus, a digital memory stores digital correction data corresponding to correction values of convergence adjustments points indicative of a plurality of points on the display screens divided in the horizontal and vertical directions. A multiplexer reads out predetermined digital correction data from the digital memory and time sharingly multiplexes. At least one digital/analog converter receives the time sharingly multiplexed data from the multiplexer and generates an analog signal. Sample and hold circuits extract a predetermined correction signal from the analog output of the digital/analog converter and sample and hold them.

Abstract: An optical magnetic recording and reproducing apparatus and method including an optical beam scanner for scanning a recording medium with an optical beam and forming a track having a predetermined angle with respect to the traveling direction of the recording medium, a magnetic field applying arrangement for applying the magnetic field onto the recording medium, and optical beam generator for generating the optical beam.

Abstract: A tape loading mechanism for a video cassette recording apparatus in which a magnetic tape held in the cassette is withdrawn therefrom by a tape loading arm and is wound around a rotary cylinder. During this time, the cassette is fixed on the upper surface of a chassis having a cam bore, which is driven by a rotary arm in which a pin inserted in the cam bore is set up. This cam bore is provided with a first cam surface having a radius of curvature equal to that of a locus of a turning movement of the pin, a second cam surface formed continuously from the first cam surface and having a radius of curvature different from that of a locus of a turning movement of the pin, and a third cam surface formed continuously from the second cam surface and having a radius of curvature equal to that of a locus of a turning movement of the pin.

Abstract: A thermal recording head includes heating elements which are provided in one array on the front surface of a base plate, and a radiating plate which is fixed to the rear surface of the base plate. The radiating plate has a thickness 1 satisfying 1.gtoreq.2d where d denotes the diameters of mounting holes formed in the radiating plate, some of the mounting holes are disposed at predetermined intervals at positions substantially corresponding to the heating element array, and the spacing 1.sub.2 between the base plate and the bottom of each of the mounting holes satisfies 1.sub.2 .gtoreq.d.

Abstract: A reproducing apparatus of a video disc player, wherein for a special reproduction such as a fast forward reproduction, or a reverse reproduction from a CLV disc, a field memory is provided for storing video signals of length of one field. A reading-in operation to the field memory is synchronized with a reproduced synchronizing signal. A writing-out operation from the field memory is synchronized with a reference synchronizing signal. A discontinuity of phase caused by a track jump is eliminated, and a stabilized picture on a TV monitor can be provided.

Abstract: The invention is to provide a more economical and practical multi-channel inverter with reference particularly to a modulation process of the time width, wherein a DC output is fed to each of a multiplicity of output channel circuits through time division to a multi-channeling, each of the time widths is modulated pertinently according to each output, thereby obtaining DC and AC multi-channel outputs independently of each other between said channels.

Abstract: A one-dimensional image sensor comprising a solid image pick-up element takes images in sequence, and generates an image signal. Clock pulses from a frequency variable type clock pulse generator having a frequency which varies in correspondence to a control signal are supplied to a one-dimensional image sensor, thereby image signals are outputted in sequence. The image signal is amplified by an amplifier and inputted to a comparator and compared with a reference signal. A frequency variable range of the frequency variable type clock pulse generator is set higher than the cut-off frequency of the amplifier, and the binary level output by the comparator is substantially the same as the image inputted to the one-dimensional image sensor and control is effected by the variable frequency of the clock pulses.

Abstract: This invention relates to the structure of a band-pass or band-rejection filters by combining a plurality of one-port surface acoustic wave resonators whose interdigital electrode fingers are disposed on a piezoelectric substrate. The filter combining surface acoustic wave resonators of the present invention consists of a series circuit of the one-port surface acoustic wave resonators disposed on a piezoelectric substrate for transmitting elastic surface wave and a plurality of circuit elements containing capacitance elements, and one-port surface acoustic wave resonators disposed between the electrodes of the plurality of circuit elements and the common ground. This structure can accomplish a filter having a low loss, high power handling capability and high design freedom of rejection- and passing-band.

Abstract: A movement detection circuit for detecting movement information of a luminance signal and movement information of a chrominance signal of a television signal comprises a first movement detection circuit for detecting the movement information of the luminance signal and a second movement detection circuit for detecting the movement information of the chrominance signal. The first movement detection circuit detects the movement information of the luminance signal based on two signals spaced by one frame period, and the second movement detection circuit detects the movement information of the chrominance signal based on two signals spaced by two frames periods.