Abstract: There is a receiving apparatus in which the received data is recorded by a recording head which accesses each portion of a recording medium. This receiving apparatus comprises: a discriminating circuit to discriminate whether the portion accessed by the recording head is the recorded portion or the unrecorded portion upon reception; and a control circuit for allowing the recording head to access the unrecorded portion on the basis of the result of the discrimination of the discriminating circuit. Upon reception, the control circuit controls the recording head so as to automatically access the unrecorded portion. Further, upon reception, an amount of unrecorded portions is displayed.

Abstract: An information recording system and apparatus records on a recording medium an audio signal, which is time-base compressed at a predetermined compression ratio, together with a data signal indicative of the compression ratio. A start signal indicative of the start of the audio signal, the data signal, the audio signal and the end signal indicative of the end of an audio signal are recorded in this order. A recording medium recorded by such system and apparatus is disclosed. A reproduction apparatus is also disclosed which reproduces the information out of such recording medium.

Abstract: A recording apparatus of a type which records signals in an L+R voice track and an L-R voice track on a recording medium is designed to record, in the L-R voice track, an additional discriminating signal for inhibiting the possibility of only a signal or signals in the L-R track being reproduced.

Abstract: A reproducing apparatus wherein luminance signals are converted by a first conversion process into converted luminance signals, while color information signals are converted by a second conversion process into converted color information signals, both signals then being multiplexed to form color video signals which are recorded on a record bearing medium. The color video signals are reproduced from the record bearing medium, and the converted luminance signals and the converted color information signals are separated from the reproduced video signals. A first inverse-conversion process inverse to the first conversion process is applied to the separated converted luminance signals to form luminance signals, while a second inverse-conversion process inverse to the second conversion process is applied to the separated converted color information signals to form color information signals, and the signals are separately output to other external devices.

Abstract: Video signal processing apparatus in which a reproduced signal and a delayed video signal produced by a delay mechanism are selectively produced and supplied to the delay mechanism and the delayed video signal produced by the delay mechanism is mixed with the video signal to be supplied to the delay mechanism.This application is a continuation of application Ser. No. 017,001, filed Feb. 19, 1987, now abandoned, which is a continuation of application Ser. No. 545,750, filed Oct. 26, 1983, now abandoned.

Abstract: An information recording apparatus for correcting the synchronization portion of a luminance signal and the pedestal portion of a chrominance signal and recording the corrected luminance and chrominance signals. An information reproducing apparatus is provided for reading the corrected luminance signal and chrominance signal and producing a luminance and chrominance signal having the time base variations that occur in the signal removed.

Abstract: An information recording system and apparatus records on a recording medium an audio signal, which is time-base compressed at a predetermined compression ratio, together with a data signal indicative of the compression ratio. A start signal indicative of the start of the audio signal, the data signal, the audio signal and an end signal indicative of the end of the audio signal are recorded in this order. A recording medium recorded by such system and apparatus is disclosed. A reproduction apparatus is also disclosed which reproduces the information out of such recording medium.

Abstract: An image memory apparatus comprising a first and a second memory and having a dual port function. It includes a first control device which controls the access to the respective memories in accordance with a set of X and Y addresses of image information and a second control device which accesses that one of the first and second memories which is not accessed by the first control device.

Abstract: An image transmission apparatus comprises means for separating color image information into a plurality of color signals and transmitting said plurality of color signals, display means for displaying a kind of the color signal transmitted by said transmitting means, and means for reproducing said color image information from a medium.

Abstract: Disclosed is a reproducing apparatus having synchronizing signal generating means of the self-running type, means for reproducing a video signal from a medium, and means for adding a synchronizing signal produced by the synchronizing signal generating means to the video signal reproduced by the reproducing means, wherein the synchronizing signal produced by the synchronizing signal generating menas of the self-running type is added to the video signal reproduced from the medium.

Abstract: Disclosed is a transmitting and receiving system including a picture transmitting apparatus for transmitting still picture signal information from the transmitting side to the receiving side, in which before the transmission of the still picture information, mode information representing a combination of transmitted color information is added, and a receiving apparatus capable of properly controlling a receiving operation according to the mode information.

Abstract: In the disclosed reproducing apparatus a detector detects that a reproducing head is properly positioned relative to selected one of recording tracks on the recording medium and a control responsive to the detecting means enables an output arrangement to put out an information signal reproduced by the head when the detector detects that the head is properly positioned relative to the selected track. This allows a display device to display the reproduced information when the head is properly positioned relative to the selected track.

Abstract: A data transmission system and apparatus used for recording on a recording medium an audio signal, compressed in time base with a predetermined compression ratio, together with a data signal for reproduction of the audio signal. The data signal is compresed of serial data of bits. A dummy bit is provided before the head bit of the serial data with the dummy bit being in inverted relation to the head bit. A detection system and apparatus for detection of the data transmitted by the data transmission system, and a recording medium on which signals are recorded according to the data transmission system are disclosed.

Abstract: Disclosed are a recording apparatus for recording video signals or audio signals on a recording medium wherein a first sound is recorded in that band which is to be used for recording the luminance signal component of the video signal and a second sound is recorded in that band which is to be used for recording the chrominance signal component of the video signal, and a reproducing apparatus for reproducing the video signals or audio signals recorded on the recording medium wherein the signal recorded in that band which is to be used for recording the luminance signal component of the video signal is reproduced as the first sound, and the signal recorded in that band which is to be used for recording the chrominance signal component of the video signal is reproduced as the second sound.

Abstract: A video signal processing device in which an input video signal is delayed by a period of time equal to an integer number times one horizontal scanning period to obtain a delayed video signal, the input video signal is output for a predetermined period related to a vertical blanking period of the input signal and a mixed signal which includes the input video signal and the delayed video signal is output for a period other than the predetermined period.

Abstract: The disclosed reproducing apparatus is capable of obtaining a dubbing signal of high picture quality. In the apparatus a head reads a video signal from a record bearing medium; an interpolation circuit interpolates the video signal read out by the head; and an interpolated signal producing circuit producing the video signal interpolated by the interpolation circuit. A dubbing signal producing circuit is arranged to have a video signal which is read out by the head and is not processed through the interpolation circuit produced outside of the reproducing apparatus as a dubbing signal.

Abstract: A phase locked loop circuit including a controllable oscillator, a phase detector for detecting a phase difference between an output signal of the oscillator and an input signal, and a control signal generator for generating a control signal for controlling an oscillation frequency of the oscillator on the basis of the output of the phase detector. The phase locked loop circuit also includes a feedback circuit for controlling a level of the control signal on the basis of a DC level thereof. The feedback circuit is able to temperature compensate for changes in the oscillator output signal thereby keeping the lock range of the phase locked loop circuit constant against variations in temperature.

Abstract: An erasing device includes a magnetic head, a drive motor for rotating a magnetic disc relative to the magnetic head, an erase signal source for producing an erase signal which varies periodically, and apparatus for causing the head to generate magnetic fields with the erase signal, wherein the frequency f.sub.V of rotation of the magnetic disc and the frequency f.sub.E of the erase signal together satisfy the following condition so that no nodes of the erasing fields are fixed at any point on a track of the magnetic disc during a plurality of rotations of the magnetic disc:f.sub.E .noteq.(k/2)f.sub.Vwhere k is a positive integer.

Abstract: In the disclosed phase-locked loop circuit, a phase detecting circuit produces a control signal for controlling the frequency of an oscillator according to the phase difference between the output of the oscillator and an input signal. The control signal controls the oscillator only during a specific period of time in which there is a phase difference. This eliminates the need for a low pass loop filter and results in a quick response, stable phase-locked loop circuit.