Abstract: A video-tape recording and reproducing apparatus comprises: a transformer system to divide the field signal into multi-channel transformer signals; a system to record and reproduce these multi-channel transformer signals using a multiple magnetic head; a jitter detection head to record and reproduce fixed frequency signals placed in juxtaposition with the above-mentioned magnetic head; and a system to mix the jitter component signal produced by the jitter detection head, after pole reversal, into each channel of the above-mentioned transformer signal. This video-tape recording and reproducing apparatus achieves high quality video reproduction by eliminating noise caused by tape travel irregularity.

Abstract: A device for recording and playing back information comprising an endless tape whereof one part has a translational movement in a direction x and n magnetic heads integral with one another whereof the gaps face that part and are aligned in a transverse direction y. The heads have a slow movement in the direction y and form n continuous tracks forming parallel and equidistant portions in the direction y.

Abstract: A video tape recording apparatus with the use of an Hadamard transformation system is disclosed. The apparatus comprises means for distributing the video signal to a plurality of channels, means for recording and reproducing the distributed video signals by plurality of magnetic heads, means for synchronizing a time-base correction signal for time-base correction with a sampling signal for Hadamard transformation, and means for phase-controlling a sampling signal for Hadamard inverse transformation to the time-base correction signal in phase.

Abstract: A channel division recording/reproducing apparatus is provided for dividing an input signal into signals for a plurality of channels through an Hadamard transformation, frequency modulating the signals of the respective channels and recording them and, after demodulating the recorded signals for the respective channels, subjecting the demodulated signals to an Hadamard inverse transformation and reproducing the input signal. Out of the Hadamard-transformed signals, the signal on the channel of the minimum frequency band is separated by a filter from the input signal and the separated signal processed by an additional Hadamard transformer and Hadamard inverse transformer and frequency modulated with a modulation index greater than the original signal and with a carrier of a lower frequency. An impovement in signal-to-noise ratio is thereby obtained.

Abstract: Apparatus is disclosed for recording video information signals on magnetic media by sampling the information signal and converting the samples to a plurality of component digital data streams which are simultaneously recorded on separate surfaces of a disc pack associated with a generally standard computer disc drive and for thereafter reproducing the plurality of digital data streams and recombining the same in a manner whereby the analog video information signal is reconstructed.

Abstract: A color video signal composed of successive groups of analog color samples, successive samples in at least some of said groups alternating between one color and another, wherein such groups represent successively scanned rows or lines of video frames or fields, is processed, prior to recording, by assigning respective samples to one of a plurality of channels of substantially equal bandwidth in a manner such that respective channels contain subgroups of samples representing only one color per subgroup, thereby minimizing the power at the sampling frequency in such channels. The information in the channels is recorded on a corresponding plurality of tracks on a recording medium by multi-channel essentially-fixed-head recording apparatus thereby realizing the manufacturing economy of essentially-fixed-head type apparatus.

Abstract: For recording and reproducing analog audio signals by a pulse-code modulation scheme so as to permit effective compensation for dropout errors, an incoming audio signal is sampled, and the analog samples are converted into a sequence of coded pulse groups or words. These words are grouped into successive notional blocks, and the odd and the even words, for example, of each block are divided into sub-blocks, as by sequentially writing the words of each block in successive storage locations in a memory and by retrieving the odd, and then the even, words from the memory. The sub-blocks of the successive word blocks are recorded in different regions on a recording medium such as magnetic tape. After being reconverted into an electrical signal from the recording medium, the words of the sub-blocks of each block are rearranged into the original order, as by use of a second memory, prior to the reconstruction of the analog audio signal.

Abstract: Apparatus for correcting time base error (such as flutter, scatter, and skew) in a multichannel, sampled-analog type video signal includes means for clocking the signal portions carried by respective channels into respective deflutter buffers by respective input clock signals derived from horizontal sync information appearing in respective channels. Each buffer contains input register means capable of receiving a signal portion containing flutter distortion, storage means for holding the signal portion received, and output register means for delivering the signal at a substantially constant periodic rate. The input register means is controlled by the input clock signal, which contains flutter distortion corresponding to the flutter distortion in the signal portion.

Abstract: An EIAJ-2, video tape recorder and reproducer machine having broadcast quality response characteristics achieved through the use of a wide band direct type FM modulator for encoding a video signal for recording onto a video tape, a pair of record/playback heads carried by a rotating drum which is partially wrapped by a length of the video tape which is transported past the drum such that the heads scan the tape in helical fashion, the speed of the drum being such that each head records upon a respective track of the video tape a segment of the modulated video signal which correspond to 1/3 of a field of the video signal, an FM demodulator for decoding the frequency modulated video signal which is recovered during playback, circuits for synchronizing the speed of the drum with the synchronization pulses of the video signal and for controlling the speed with which the tape is transported pass the drum and circuitry for minimizing distortion of the video signal caused when the segmented portions of the video sig

Abstract: Method of recording and reproduction of wide frequency band video signals onto or from a magnetizable recording carrier, carried out by the following means: means for separating of the video frequency signals into first and second signals of lower and upper frequency range respectively, for converting said second signal into a third signal the frequency range of which equaling that of said first signal, for frequency modulating a carrier wave frequency by said first and third signals and for recording the frequency modulated signals by means of a twin head, for reproducing the recorded signals by means of a twin head and for amplifying, limiting and demodulating the recorded signals and reconverting the third signal into its original frequency range and combining the so reconverted third signal and said first signal.

Abstract: The present invention relates to methods which make it possible to partially eliminate the redundancy in television signals. It consists in splitting the spectrum of the video signal into two parts, one containing the low frequencies, this being transmitted integrally, and the other containing the high frequencies, this being transmitted once every n times and being repeated n-1 times at reception.

Abstract: A video recording system with a plurality of fixed recording-and/or-playing-back magnetic heads has been disclosed. A video signal with a wide frequency band is converted using an Hadamard conversion circuit, to a plurality of narrow band signals. Each narrow band signal is recorded and played back by each fixed head. The Hadamard conversion circuit is very simple in structure and can be provided with digital switching circuits and adders or integrators.

Abstract: A voice actuated voice logging recorder includes logging decks and a recall deck such that voice data may be recorded or played back in the recall deck without interruption of the recording of voice data onto the tape of the logging deck. The invention further includes networks for recording a time code modulated by a unique signal indicative of the beginning of each message of voice data and for automatically repositioning the tape of the recall deck in response to the detection of the unique signal.

Abstract: A signal recording and/or reproducing apparatus having a plurality of signal recording means for successively recording an input signal on a recording medium and/or a plurality of signal reproducing means for successively reproducing a recorded signal from the recording medium, and a plurality of signal recording and/or reproducing circuits adapted to correspond to the respective signal recording and/or reproducing means; is further provided with one or more phase shifters for phase-shifting by 120.degree. relative to each other the signals which are successively recorded or reproduced so as to avoid any increase in level in the reproduced signals during overlap periods when the signal recording or reproducing means are simultaneously operative.