Abstract: A method for transmitting data when a system detects the amount of data which can be transferred, and divides the data to be transferred into a plurality of data blocks to form a list. A transfer device refers to the list and carries out input and output processing between a VTR or a network and a memory. Thus, the data can be efficiently transmitted at high speed with high reliability and independent of system configuration. Additionally, the data can be rearranged in the course of its transmission.

Abstract: In a video tape recorder of the color under recording type, in which a low frequency band converted carrier chrominance signal is recorded together with an FM luminance signal, another FM modulator is provided for modulating a wide band chrominance signal. An additional head records the FM chrominance signal on at least a part of a track on which video signal has been recorded in the color under recording. In reproduction, it is checked whether the FM chrominance signal is reproduced or not for selecting the FM chrominance signal or the color under recorded carrier chrominance signal as a reproduced chrominance signal output.

Abstract: In a video camera having an image pick-up section and a signal processing section to which an output signal from the image pick-up section is supplied through a transmission cable, there are provided in the image pick-up section, an image pick-up device and reference signal adding means for adding a reference signal indicative of the position of a reference pixel of the image pick-up device in a predetermined interval of an output video signal of the image pick-up device and there is provided in the signal processing section extracting means for extracting the reference signal from a signal which is supplied from the image pick-up section.

Abstract: A video tape recorder capable of recording a normal definition video signal and a high definition video signal having an image quality higher than the normal one in a simulcast for broadcasting an identical program in a conventional broadcasting system and a high definition system. The common video signal is recorded in a conventional analog signal format at a tape feeding speed of the normal mode by an EP mode head defining a tracking width narrower than that of a standard mode head, while the high definition video signal is recorded in a digital form by a high definition video head additionally mounted on a rotary drum. Additionally, a common video signal recorded by a conventional video tape recorder can be reproduced.

Abstract: In a helical scan type magnetic recording/reproducing apparatus in which a magnetic tape is wound on a rotary cylinder through about 350.degree. for recording/reproducing each of the component color video signals, two magnetic heads in a reverse azimuth relation to each other are provided in a symmetrical relation at 180.degree. on the rotary cylinder having a diameter half that of a conventional rotary cylinder, with the cylinder being adapted to make two rotations during one field period of the color video signal. By selecting input/output timings of four memories at a predetermined rate to be determined by a specific rule, strongly correlated video signal is disposed in the tracks neighboring the track recorded with video signal so as to obtained high reproducing S/N ratio.

Abstract: N-channel component signals (N.gtoreq.3) of a video signal is recorded and reproduced by N pairs of magnetic heads in any tape speed mode. The N pairs of heads are mounted on a circumference of a rotary cylinder so as to be disposed in the rotating direction of the rotary cylinder at substantially constant intervals of (180/N) degrees with each pair of heads being disposed to be apart by substantially 180 degrees from each other. The relative heights of the heads in each pair in an axial direction of the rotary cylinder are substantially the same. The widths of the N pairs of heads are substantially the same. Signal timings are adjusted by delay circuits before recording and after reproduction.

Abstract: A video tape recorder has a pair of rotary magnetic heads spaced apart by 180.degree. from each other on a rotary cylinder which rotates one turn (360.degree.) during each field of a video signal to be recorded. A recording circuit has first and second memories for respectively storing first and second channel component signals of the video signal contained in at least one field for time-compressing them. The first and second memories are controlled to output the time-compressed first and second channel component signals alternately. A reproducing circuit has third and fourth memories for respectively time-expanding the time-compressed first and second channel component signals contained in a reproduced signal to obtain the original two-channel component signals.

Abstract: In a system for connecting a video signal recording/reproducing apparatus and a color TV receiver, two component signals--a luminace signal and a carrier chrominance signal--are transmitted separately from each other from the video signal recording/reproducing apparatus to the TV receiver. The video signal recording/reproducing apparatus has first and second output terminals for respectively outputting luminance and carrier chrominance signals obtained from a color video signal reproduced from a recording medium. The color TV receiver has first and second input terminals adapted to be respectively connected to the first and second output terminals of the video signal recording/reproducing apparatus for receiving the luminace and carrier chrominance signals. The color TV receiver may be provided with a switching circuit for selecting a composite video signal received in the conventional manner or the separately received two component signals.

Abstract: A video tape recorder for recording two-channel component signals of a video signal on a magnetic tape and for reproducing the recorded signals includes a recording signal processing system for processing the two-channel component signals into first and second recordable signals, an electromagnetic conversion system including two pairs of magnetic heads for recording the first and second recordable signals, respectively, on the magnetic tape and for reproducing the first and second recorded signals, respectively, and a reproduced signal processing system for processing the reproduced signals into representations of the original two-channel component signals. Each pair of heads of the two pairs of heads are disposed so as to be apart by 180.degree. from each other on a rotary cylinder and so as to be apart by 90.degree. from each head of the other pair of heads.

Abstract: In a multi-tube image pick-up apparatus, such as, a color television camera, having image pick-up tubes of the electro-magnetic focusing type with their respective focusing coils connected in series with each other for minimizing the power consumption thereof; a main focus current control circuit is connected in series with the series-connected focusing coils for controlling a main focus current so as to maintain an adjustably predetermined value thereof, and individual focus current control circuits respectively corresponding to the image pick-up tubes are connected in parallel with the respective focusing coils for controlling the individual focus current flowing through each of the focusing coils without influencing the individual focus currents through the other coils.

Abstract: Deflection control signals are supplied to respective horizontal and vertical deflecting plates in a plural pickup-tube color television camera. A predetermined one pickup-tube is supplied with the horizontal and vertical deflecting signals that are generated by a suitable source. These signals also are supplied to a compensating voltage generator which is selectively operative to produce respective horizontal deflection compensating voltages for each of the remaining pick-up tubes and respective vertical deflection compensating voltages for such remaining tubes. A horizontal combining circuit is provided for each of the remaining tubes and a vertical combining circuit also is provided for each of these remaining tubes.

Abstract: An image pick-up tube which has a high signal to noise ratio relative to the prior art provides for a disk-shaped printed circuit board formed with a central opening through which the image can pass to strike the active part of the tube and wherein the printed circuit board carries a first amplifier stage which is very closely spaced and connected to the image pick-up means so as to provide minimum lead lengths to reduce stray capacitance and give high signal to noise ratio.

Abstract: A deflection control circuit is provided for a plural-tube color television camera for compensating the deflection sawtooth waves furnished to the red and blue image pickup tubes so that the images thereof register with the image of the green pickup tube, and any centering, skew, rotation, or other errors are eliminated. The circuit includes a pair of controllable complementary current sources, such as junction transistors, with current outputs connected together in series, and with each current source having a control terminal. An impedance is connected to the junction of the current outputs, and a sawtooth wave, furnished directly to the green pickup tube, is also supplied therethrough. A control signal generator supplies a correction voltage to the control terminals of the current sources so that the current through the latter is varied in a complementary relation. A compensated output sawtooth wave is provided from the junction of the current sources to one of the red and blue pickup tubes.

Abstract: A circuit for controlling the deflection of an electron beam in an image pick-up tube of the electro-static deflection type including a target electrode, a cathode electrode for generating the electron beam, and deflection plates for causing the electron beam to scan the target electrode, the circuit including a current source transistor for generating a current, a first capacitor for storing a voltage corresponding to the generated current, a pair of switching transistors for generating a saw-tooth signal in accordance with the voltage stored by the capacitor and for supplying the saw-tooth signal to the deflection plates for causing the beam to scan an effective image area on the target electrode, a transistor for increasing the amount of current generated by the current source transistor when the effective image area is not being scanned, a circuit for discharging the capacitor during only a portion of the time period when the effective image area is not being scanned and for clamping the level of the saw-

Abstract: Deflection control apparatus for registering the electron beam, rasters of electrostatic-deflection pick-up tubes of a three-tube color television camera includes a compensating voltage generator with inputs connected to receive horizontal and vertical sawtooth deflection signals provided from a deflection signal generator, and outputs providing compensating voltages to adjust for size, skew, and rotation. A combining circuit is provided to add the deflecting signals to the respective compensating voltages to generate adjusted compensating voltages for application to respective electrostatic deflection plates of certain ones of the tubes. For each adjusted deflecting signal, the combining circuit includes a transistor circuit having an input electrode coupled to receive the associated compensating voltage and an output electrode connected through a load resistor to an output of the deflecting signal generator.

Abstract: An automatic registration system for use in a plural pickup tube color television camera comprises an edge detector circuit which provides an edge signal representing the position of an edge of a sharply-edged object; a time difference detector circuit for detecting the difference in time between the scanning of the edge by, for example, a green pickup tube, and that by a red or blue pickup tube, and providing a deflection signal; a multiplier providing the product of the edge signal and the deflection signal as an error signal; a sample hold circuit for providing a misregistration signal, in response to the error signal, having a magnitude and polarity respectively indicative of the degree and direction of misregistration of the pictures of the pickup tubes; and a circuit for correcting misregistration in response to the misregistration signal. The circuit for correcting misregistration can include an up/down counter whose direction of counting is determined by the polarity of the misregistration signal.