Abstract: An improved definition television (IDTV) set including a motion sensing circuit for sensing motion of images and generating a motion sensing signal, a motion adaptive Y/C separating circuit separating a composite video signal into a luminance signal and a chrominance signal on the basis of the motion sensing signal, chroma demodulation and matrix circuit generating three primary color signals of red, green, and blue from separate luminance and chrominance signals separated at the Y/C separating circuit, and a motion adaptive scanning line converting circuit for converting a line scanning method of the three primary color signals to a progressive line scanning, while effecting a field or line interpolation operation to the three primary color signals.

Abstract: A phase synchronizing circuit for a time axis shift correcting circuit includes a closed-loop phase lock circuit of a phase comparator, a VCO, and a frequency division counter, for providing an output signal phase locked to a reference signal included in an input data signal. Hold circuitry, responsive to a hold instruction signal, is provided to hold the phase relationship of the output signal held just prior to the hold instruction signal for the duration of the hold instruction signal. The hold instruction signal is produced in response to a predetermined condition of the input data signal.

Abstract: A video processing system in which data obtained from sampling an input video format signal according to a first timing signal is written into a first memory according to the first timing signal. Data is read-out of the first memory according to a second timing signal having a frequency equal to N times that of a horizontal synchronizing frequency of the input signal, thereby obtaining data with no time-base fluctuation. M-samples of data from the first memory is then written into a second memory, and data from the second memory is read-out such that the read-out signal from the second memory has a different phase than that of the input video format signal. The system is operable for simultaneously stopping data being read-out of the first memory and data being written into the second memory for a period of time equal to R+kM samples of the input video format signal, wherein R is an integer remainder of N/M, and k is either a positive integer or zero.

Abstract: Method and apparatus of controlling time base for use in an information reading system in which information recorded on a recording medium is read by a pickup, write a read signal obtained by the pickup into a memory device and read-out the signal stored in the memory device by using a read-out reset signal so as to perform the time base control. Upon starting of a track jump operation of the information reading system, phases of generation of the read-out reset signal before and after the starting of the track jump operation is changed with each other.

Abstract: A time-base error correction circuit for use in a video disk player, video tape player, or the like, with which all residual time-base error is eliminated. A detector circuit detects the amount of residual time-base error between the reproduced video signal and a write clock signal. A variable delay circuit disposed prior to a memory in which the video signal is stored adjusts the delay of the reproduced video signal accordingly.

Abstract: A scanning method for high-speed reproduction of video data from a recording disk, whereby scanning is executed as a sequence of track jump operations, in which the data detection point of the pickup is caused to jump across tracks of the disk, alternating with intervals of play operation in which data are read from the disk. During each interval of play operation, data obtained from the disk are written into a memory, and thereafter are repetitively read out from the memory to produce an output video signal, until being updated during the next play interval. A display image that is free from noise and disorder is thereby obtained during scanning operation.

Abstract: A video information playback system for playing the so called CLV disks which uses a digital video memory for enabling special playback mode operations such as the SLOW mode, the STILL mode, and the FAST mode. In order to simplify the construction of the system, a frequency of write and read clock signals used in the digital video memory is selected n times the horizontal synchronizing signal frequency. A time base servo control part of the system is controlled using a phase difference signal between a playback synchronizing signal and a reference signal whose frequency is 1/n time the frequency of the write and read clock signals. During a track jump operation for a special playback mode operation, a supply of the write clock signal and/or the read clock signal to the reference signal generator is stopped so that the phase difference is maintained constant before and after the track jump operation.

Abstract: A video information playback system for playing the so called CLV disks which uses a digital video memory for enabling special playback mode operations such as the SLOW mode, the STILL mode, and the FAST mode. In order to simplify the contruction of the system, a frequency of write and read clock signals used in the digital video memory is selected n times the horizontal synchronizing signal frequency. A time base servo control part of the system is controlled using a phase difference signal between a playback synchronizing signal and a reference signal whose frequency is 1/n time the frequency of the write and read clock signals. During a track jump operation for a special playback mode operation, a supply of the write clock signal and/or the read clock signal to a reference signal generator is stopped so that the phase difference is maintained constant before and after the track jump operation.

Abstract: A system for detecting an inversion of burst phase of a video signal, includes a reference color subcarrier signal generator for generating a reference color subcarrier signal whose frequency is equal to the frequency of the color burst signal of the video signal, and a phase comparator for comparing in phase the color burst signal of the video signal and the reference color subcarrier signal. When the level change in an output signal of the phase comparator exceeds a predetermined reference level, the system produces an indication signal indicating that the burst phase of the video signal is inverted.

Abstract: An apparatus for the color synchronization of reproduced video signals, including a phase-locked loop (PLL) circuit. The PLL circuit detects a phase difference between a reproduced video signal (which may be a PAL video signal), and the output of a voltage-controlled oscillator within the PLL circuit, and has an internal loop filter which operates such that, when the apparatus is in an external synchronization mode, a high frequency component of the detected phase difference is used to control the time-base error of a variable delay line in the apparatus. Control means are included for placing the apparatus in external or internal synchronization mode, depending on the presence or absence of an external control signal. Further means are included for substantially precisely holding the phase inversion condition of a PAL video signal.

Abstract: A noise elimination circuit for eliminating noise signals from data given by a binary form includes a modulo in up/down counter having a first input for receiving binary data, a second input for receiving clock pulses and output for producing a counted signal. The counter is effected to count up in response to the clock pulses when the binary data is a HIGH, and to count down in response to said clock pulses when the binary data is a LOW. A decoder is provided which has inputs for receiving the counted signal, a first output for producing an indication signal when the counted signal corresponds to a first predetermined number i, and a second output for producing an indication signal when the counted signal corresponds to a second predetermined number j, in which i is equal to or greater than zero, j is greater than i and n is equal to or greater than j.

Abstract: A chroma signal phase correction circuitry to be used in a video information signal playback system for playing back the video information recorded on a recording medium, having a special playback mode of operation for jumping from one portion of recording tracks to the other, comprises a plurality of phase correction channel having a substantially constant frequency amplitude characteristics and a phase characteristics satisfying a condition that the difference between the phase shift values of each of the phase correction channel is equal to the difference between the phase of the color subcarrier signals of the color video signals from adjacent two recording track portions, and a switching means for selecting one of the phase correction channels for allowing the color video signal to pass therethrough, whereby compensating for the phase shift of the chroma signal during the jump operation while maintaining a phase of a luminance signal component of the color video signal.

Abstract: A tracking servo system of a video or audio disc player, wherein the control data signals extracted from the electric signals read out from an information-carrying face of a video or audio recording disc are inhibited from being delivered from the servo system when the servo loop forming part of the system is open.

Abstract: A pickup control device for a data reading device in which, for fast or slow reproduction modes, a slider motor is forcibly driven to change the relative position of the pickup and the disk in a radial direction of the disk after which the pickup is set to a normal or center position thereof. A slider motor for changing the relative position of the pickup and the disk is driven in response to a fast or slow reproduction instruction and a position signal representative of the position of the pickup is produced with which a tracking servo loop is opened for a predetermined period of time during which the pickup is returned to its normal position. With this construction, the pickup is prevented from returning to a first track from a second track to which it has jumped through a scratch or the like.

Abstract: A tangential error signal generator to be used in a PAL type video disc player in which a synchronous signal such as a pilot burst signal extracted from a color video signal read from a video disc of PAL type is compared with a reference periodic signal so as to produce a phase error signal representative of the phase difference between the synchronous signal and the reference periodic signal. The phase error signal is amended in accordance with the jump direction and the jump distance required for a desired mode of reproduction in the video disc player such as a still, fast or slow mode of reproduction.

Abstract: Continuous fluorination of carbon is carried out by employing an apparatus for contact reaction of solid powder and reactive gas which comprises a horizontal reactor having a trough provided with weirs (e.g. height: 1 to 6 mm., interval: 5 to 30 cm.) and a vibrating means for vibrating the trough, and in which carbon particles supplied continuously are transported on the trough in a form of thin layer by the vibration of the trough while continuing the reaction by contacting efficiently the carbon particles with a fluorine gas. The contact reaction is efficiently conducted without accumulating the reaction heat to produce the fluorinated carbon in high yields, and the process is useful for the mass production. The apparatus is also useful for various contact reaction of a solid powder and a reactive gas.

Abstract: Continuous fluorination of carbon is carried out by employing an apparatus for contact reaction of solid powder and reactive gas which comprises a horizontal reactor having a trough provided with weirs (e.g. height: 1 to 6 mm., interval: 5 to 30 cm.) and a vibrating means for vibrating the trough, and in which carbon particles supplied continuously are transported on the trough in a form of thin layer by the vibration of the trough while continuing the reaction by contacting efficiently the carbon particles with a fluorine gas. The contact reaction is efficiently conducted without accumulating the reaction heat to produce the fluorinated carbon in high yields, and the process is useful for the mass production. The apparatus is also useful for various contact reaction of a solid powder and a reactive gas.

Abstract: In a tracking servo system of a recording-disc information reading and reproducing apparatus such as a video disc player, a tracking error signal indicative of an amount of deviation of an information pickup medium such as a focused spot of a scanning beam of light from a target track of the recording disc being scanned is amplified with a gain which is varied as the pickup medium is displaced radially of the recording disc between an outer peripheral area and a central area of the disc.

Abstract: A tracking servo system of a video disc player, in which the switch provided in the servo loop of the system is closed and accordingly the servo system is locked in when the level of the reproducing signal read out from the video disc is at its peak or close to the peak and concurrently the amount of error between the scanning spot and the track to be scanned is of a minimum value.

Abstract: A digital frequency synthesizer radio receiver, comprising a scan memory for storing a digital value data concerning a broadcasting frequency; a digital value data entry device for selectively entering a digital value concerning a broadcasting frequency; a preset memory having a plurality of storing locations, each adapted for storing a digital value concerning a specified broadcasting frequency, a channel selector coupled to said preset memory for selecting one of said storing locations thereof, said preset memory being responsive to said channel selector and said digital value data entry device for loading the entered digital value data in the location of the preset memory selected by the channel selector; and a phase locked loop selectively and operatively coupled to either of said scan memory and said preset memory for providing an oscillation frequency signal the frequency of which is associated with the digital value data loaded in the selected one of said scan memory and the preset memory.