Abstract: A digital video tape recorder comprises a head drum, four transducer heads mounted in pairs on the head drum for recording oblique tracks on a magnetic tape, a demultiplexer for distributing digital data to be recorded and corresponding to a video signal such that each field of the video signal is divided into 50-line segments, the digital data corresponding to each field are evenly distributed between all four of the heads for recording, and each track comprises a block of digital data relating to one 50-line segment and a block of digital data relating to another 50-line segment, the two blocks of digital data being separated by an edit gap.

Abstract: This invention relates to an information signal recording apparatus which can be used also as an audio tape recorder only. When it is used only as the audio tape recorder, an audio signal is sampled with a frequency m times the sampling frequency of an audio signal which is used upon recording a video signal and the thus sampled PCM digital audio signal is diffusively recorded on at least two recording intervals thereby to improve the tone quality of the audio signal and the compatibility with the audio tape recorder using a video tape recorder of the same kind can be established.

Abstract: A method of recording numerical information in a plurality of disk units, in which the bits of each word of numerical information are transmitted simultaneously, each bit being allocated to a unit associated with the weight of that bit in that word, and a memory system for implementing the method, including a main controller (2) provided with a selector enabling the distribution and synchronization of the information signals.

Abstract: An apparatus for recording and/or reproducing a signal on a tape recording medium with a plurality of rotary recording and/or reproducing heads includes a first input and/or output terminal for receiving and/or deriving a video signal, a second input and/or output terminal for receiving and/or deriving an audio signal, and a recording and/or reproducing circuit including a rotary transfer. A first rotary recording and/or reproducing head is connected to the first input and/or output terminal through the recording and/or reproducing circuit and records and/or reproduces the video signal on first parallel slant tracks of a tape recording medium. A plurality of second rotary recording and/or reproducing heads are connected to the second input and/or output terminal through the recording and/or reproducing circuit and record and/or reproduces the audio signal on second parallel slant tracks of the tape recording medium.

Abstract: A wide band video signal recording apparatus is arranged to simultaneously record, on a recording medium, multi-channel video signals which are obtained by frequency modulating a luminance signal included in a wide band video signal; by frequency dividing the frequency modulated luminance signal at different phases thereof to obtain multi-channel luminance signals; and by multiplexing a carrier chrominance signal included in the video signal with the low band of at least one of the multi-channel luminance signals.

Abstract: A magnetic tape recording/reproducing apparatus for recording video signals on a magnetic tape without providing a guard band between each two adjacent signal tracks. The apparatus comprises a first switching circuit for exchanging 2-channel component signals every nH period to obtain two combined signals each composed of the 2-channel signals which alternate every nH period, two modulators for modulating the two combined signals, a head section having two pairs of rotarty magnetic heads for recording the modulated signals on the magnetic tape so that each two adjacent blocks contain a same channel component signal and for reproducing the recorded signals from the magnetic tape, two demodulators for demodulating the reproduced signals, and a second switching circuit for exchanging the demodulated signals every nH to obtain the 2-channel component signals. With this arrangement, the recording density is remarkably increased and the cross talk interference hardly occur.

Abstract: In a video recorder having a drum with opposing dual record heads, successive fields of only the luminance signal (without the chrominance signal) are recorded by the heads during successive head rotations through 180.degree.. The tape is overwrapped around the drum by a certain angle (over 216.degree., for example) so that the chrominance signal of each preceeding field may be compressed and recorded during each head rotation through the overwrap angle (i.e., from 180.degree. to 216.degree. in the example). Because the luminance signal is not mixed with the chrominance for recording (as has been usual), the luminance bandwidth may be increased by about 1 megaHertz to occupy the frequency band otherwise occupied by the color-under chrominance signal in the prior art. This provides a significant improvement in overall video image resolution.

Abstract: In a VTR which provides recording and reproduction of one field video signal the signal is divided into N signal portions with the use of M number of magnetic heads. The signal to be recorded into the nth (n=1, 2, . . . , N) track is delayed by a time (n-1).multidot.T at the recording end and an addition signal of period E is inserted into the blanking period which results from the delaying, and during reproduction or play-back the signal reproduced from the n-th track is delayed by a time (N-n).multidot.d, and is TBC processed, thereby obtaining a composite screen with no skew.

Abstract: In a PCM (pulse code modulated) audio signal recording and/or reproducing apparatus, a scanning track formed by one scanning of a tape by a rotary head is divided into a plurality of track areas in its longitudinal direction to thereby form multi-channel segment track areas, and the PCM audio signal is recorded on and/or reproduced from the segment track area of each track corresponding to a particular channel on the tape. When a plurality of programs or events are sequentially recorded in a timer scheduled recording mode, it is possible to select either a series recording mode in which successive events are recorded only in the segment track areas of one channel or a parallel recording mode, in which the successive events are recorded in segment track areas of different channels, respectively.

Abstract: A digital recording and reproducing system wherein luminance signals digitized and converted into the low speed signals and chrominance signals digitized at the time of recording are distributed among a plural number of channels and the signals of the plural number of channels are recorded respectively on a recording medium. At the time of the reproduction, the signals of the plural number of the channels are reproduced respectively from the recording medium and combined to form the luminance signals and the chrominance signals respectively. The luminance signals in the combined signal are converted into a high speed signal and output terminals for outputting dubbing signals from the system for dubbing the signals are led. The output side of a low speed-to-high speed converter and a channel combination circuit.

Abstract: A recording apparatus includes a memory circuit for storing a video signal derived from a high speed scanning video camera the scanning speed of which is faster than the scanning speed of a standard television signal and a plurality of rotating magnetic heads supplied with video signals of a plurality of channels which are read out in parallel from the memory circuit. The video signals of the plurality of channels are recorded on a magnetic tape by the plurality of rotating magnetic heads so as to sequentially form slant adjoining tracks.

Abstract: A video data recording/reproduction method used in a VTR, wherein distribution of picture elements into channels is altered for each field or frame so that the same picture element arrangement produced by interpolation does not continue in successive fields or frames, and wherein information indicating the type of picture element arrangement is recorded together with the video data. The method is intended to perform interpolative correction for still picture portions without sacrificing the resolution, while retaining the editing functions in units of field or frame, whereby degradation of a reproduced picture can be minimized.

Abstract: An electronic still image camera and playback system can record image data on the proposed standard 47 mm magnetic floppy disk in a manner whereby the horizontal line resolution of the recorded data is substantially increased by separating alternate groups of image data for recording, respectively, on two tracks of the magnetic media. The two tracks of the image media may be either two adjacent standard tracks or two subtracks confined within the footprint or envelope of the standard track. The image data from the dual tracks is recombined by interleaving to provide a high resolution hard copy print or other visual display. Alternatively, the dual track recorded image data may be retrieved in a conventional manner to provide a conventional low resolution hard copy or other image display.

Abstract: A helical scan type magnetic recording and reproducing apparatus comprises a rotary body which is wrapped with a magnetic tape on an outer peripheral surface thereof over a predetermined angular range and has a tape guide for guiding a part of the magnetic tape, and n pairs of rotary heads mounted on the rotary body. Each pair out of the n pairs of rotary heads is constituted by two rotary heads which are mounted at mutually opposite positions on a rotational plane of the rotary body at the same height position, and each pair out of the n pairs of rotary heads is mounted at different positions in an axial direction of the rotary body.

Abstract: A signal processing circuit for a video recording and reproducing apparatus comprises a ramp inserting circuit for inserting a ramp waveform at periodic intervals into a video signal during recording. The ramp waveform varies linearly as a function of time from the minimum to the maximum level of the video signal. On playback, the inserted ramp is periodically detected from a reproduced video signal by a ramp detector. The waveform of the detected ramp is corrected to improve its signal-to-noise ratio by an averaging circuit and applied to a transfer circuit having a transfer function describing the relationship between the original ramp waveform and the corrected ramp waveform. The waveform of the reproduced video signal is transformed according to the transfer function.

Abstract: A multitrack magnetic recording and reproducing device of the type, which converts analog signals into digital signals and records and reproduces such converted data by splitting onto a plurality of tracks, comprises heads for both high and low recording densities such that track pitches corresponding to them are at an integral ratio. It includes a reproducing circuit having detecting-decision making means such as multiplexers which, when information recorded by a head for lower recording density is reproduced by corresponding heads for higher recording density, is adapted to determine whether any of the outputs from these heads is incorrect.

Abstract: A real-time magnetic digital video disk recording system has been developed for applications in on-line digital imaging systems and off-line fast access image storage and retrieval buffers. The disk recorder uses new high density recording technology and Winchester computer drive technology in a unique peripheral configuration which is fully synchronized to video system timing, provides for flexible formatting, achieves fast random access to a large video image file, and eliminates the need for complex data controllers. The recorder includes two independent actuator and head assemblies for alternately recording successive video fields on separate tracks on separate zones A and B of a disk stack. Movement of one of the actuators and head assemblies is controlled and occurs within a field time to skip tracks containing media flaws to achieve real time digital video recording.

Abstract: In a cue recording system for a tape recorder, an audio signal is recorded by a first recording section on a first track of a tape. In a second recording section, a cue signal is superposed on the audio signal. The composite signal formed of the audio and cue signals is then recorded on the second track of the tape. In the playback mode, the audio signal and the cue signal recorded on the second track are separated by a filter. When the separated second-track audio signal is mixed with a first-track reproduced output, the resultant audio signal has substantially the same low-frequency response characteristic as a stereo head system, and a same S/N ratio as the monaural head system. An insufficient low-frequency response of the second track is compensated by the flat frequency response of the first track. Degradation of the S/N ratio of the signal of the first track can be improved by the mid or higher frequency component of the audio signal of the second track.

Abstract: An apparatus for processing video signals receives an input digital video signal corresponding to a displayed image and occurring in successive samples derived at a sampling clock frequency. The input digital video signal is divided into successive groups of samples corresponding to successive intervals of time, each group being further divided into N sections of successive samples and the samples within each section corresponding to a defined area of the displayed image. The received samples are written into an addressable memory at selected write addresses and are read out from selected read addresses. The read addresses are generated so as to cause cyclically sequential read out of the N sections, with the samples being read out in the order of entry and starting from the initial samples in each of the N sections. The N sections read from the memory are supplied to respective latch circuits, the outputs of which constitute N channel signals.

Abstract: According to a method of recording identification signals on a software recording medium of the invention, an identification signal is recorded in a left channel track of a soft tape, and an inverted signal of the identification signal is recorded in a right channel track of the soft tape. Non-inverted program signals are in the right channel and left channel tracks. For this reason, the identification signal and the inverted identification signal cancel each other in a program play mode of the soft tape.

Abstract: In a stationary head type PCM recorder having an A/D converter for sampling an analog signal and converting the analog signal to a digital signal, a signal processing circuit including data delay means for adding an error detection and correction code and a predetermined signal to the digital signal for each error correction group of a predetermined number of samples, and a multi-track head for recording an output of the signal processing circuit on a plurality of tracks of a magnetic record medium and reproducing the signals recorded on the magnetic record medium; incorrectability of the error detection and correction code for a burst error in the output analog signal due to a burst error in the reproduced output is reduced by delaying parity data by the error detection and correction code and the digital signal data by different delay times such that the digital signal data are dispersely recorded in a track direction and a tape transport direction, and allotting the delayed data to the multi-track head suc

Abstract: Digital video tape recorder apparatus comprises a recording head assembly having 2n heads, where n is an integer, preferably one, two or three, a demultiplexer for demultiplexing the video samples of an incoming digital television signal sample-by-sample, into 2n channels for supply to the 2n recording heads, and a switching arrangement for switching the connections between the channels and the heads line-by-line and also possibly field-by-field or frame-by-frame of the television signal.

Abstract: An apparatus for reproducing digital signals on a multi-track recording medium, wherein a signal to be written in a memory is selected from among signals of each track demodulator a demodulation means (50) by a writing track selection circuit (200), the signal of the writing track selected by the track selection circuit (200) is stored in a memory (102), the timing of writing the signal of the selected track is determined by a write timing setup circuit (300), and the timing of reading is determined by a read setup circuit (400) so that the signal stored in the memory (102) is read out during two write timing periods set by the write timing setup circuit (300), and the memory (102) is directed for writing or reading selectively by a read/write selector (100) in accordance with the output signals from the write timing setup circuit (300) and read setup circuit (400), so that writing or reading takes place at an interval of 1/2ANfc.

Abstract: Described is a method for PCM signal recording in which, when single-channel or multichannel PCM signals are recorded so that one-channel PCM signals are recorded in plural recording tracks, the input PCM signals of one channel are correspondingly distributed to the plural recording tracks with at least one word as a unit, and in which the distributed plural signals are subjected to an encoding operation independently of one another and are recorded on the plural recording tracks. In distributing the input PCM signals by word units, word groups consisting of a predetermined number of consecutive words are sequentially distributed to the recording tracks, or plural consecutive words equal in number to the number of recording tracks are distributed to the tracks.

Abstract: Magnetic recording and reproducing apparatus records and reproduces on or from a magnetic recording tape a high speed video signal obtained from a high speed scanning video camera having a scanning speed N times the scanning speed of a standard video camera generating a standard television video signal, where N is an integer. The apparatus includes a drive for driving the magnetic recording tape to a run at tape speed N times the tape speed of a standard recording apparatus, circuitry for dividing the high speed video signal into N-channel video signals, and an expander for expanding the time axis of the high speed video signal so that each of the N-channel video signals is slightly compressed as compared to the standard television video signal.

Abstract: A signal delaying device delays a digital signal corresponding to an audio signal. Input signal data is sequentially written into a memory with regularity and data at an address which was written a predetermined period of time before writing of the present data is read out thereby effecting the delay of the signal. In using, the memory is divided into a number corresponding to the number of channels of input signals, that is, the address designation and the manner of control of writing and reading of the memory is changed in accordance with the number of channels of input signals. The delay time of the signal is set by properly setting the predetermined period of time.

Abstract: A real-time magnetic digital video disk recording system has been developed for applications in on-line digital imaging systems and off-line fast access image storage and retrieval buffers. The disk recorder uses new high density recording technology and Winchester computer drive technology in a unique peripheral configuration which is fully synchronized to video system timing, provides for flexible formatting, achieves fast random access to a large video image file, and eliminates the need for complex data controllers. The recorder includes two independent actuator and head assemblies for alternately recording successive video fields on separate tracks on separate zones A and B of a disk stack. Movement of one of the actuators and head assemblies is controlled and occurs within a field time to skip tracks containing media flaws to achieve real time digital video recording.

Abstract: A data recording/reproducing apparatus simultaneously records parallel data in recording tracks the number of which corresponds to the number of parallel data to be recorded, and sequentially reproduces the contents of the recording tracks to form serial data. A plurality of video signals for cooperatively forming a single picture are used for the parallel data. When one picture is quartered, four parallel video signals are simultaneously recorded in four recording tracks. By reproducing the contents of the recording tracks for each track in a sequential manner, one serial video signal corresponding to the picture is obtained. With this arrangement, high resolution picture data obtained from a solid-state image pickup device can be recorded and reproduced without the use of a specially designed parallel/serial converter.

Abstract: A digital signal of data and synchronization words is distributed to a plurality of circuit paths and transformed into non-return-to-zero inverted (NRZI) signals for application to a plurality of stationary parallel magnetic heads for recording the distributed NRZI signals along first parallel tracks on a magnetic tape when driven toward one end thereof and along second parallel tracks interleaved with the first tracks when the tape is driven toward the other end thereof. Each of the transducers has a differential characteristic with which the recorded signal is detected as a ternary signal, the detected signal is converted to a binary signal to recover the original digital signal. The synchronization word is detected from the recovered digital signal to generate a timing signal indicative of the position of each binary digit of the data word with respect to the detected synchronization word.

Abstract: An automatic tracking system for a VTR has playback heads having widths smaller than the recorded track widths. At least two tracks are simultaneously reproduced. If mistracking occurs, the amplitude of the reproduced signal from one head decreases, while the amplitude of the signal from the other head remains constant. This is detected and used to generate a bimorph control signal to correct the tracking.

Abstract: A video signal recording apparatus comprises a guiding mechanism for guiding a magnetic tape, and a main head and a sub-head for scanning and recording a composite video signal throughout a predetermined range of the magnetic tape. The main head and the sub-head is separated by a predetermined angle and mounted on a rotary body with a difference in their height positions. The main head scans over the magnetic tape to record a signal by forming a first track part comprising a plurality of tracks formed obliquely with respect to the longitudinal direction of the magnetic tape, in a first region along the width direction of the magnetic tape, while the sub-head scans over the magnetic tape to record a signal by forming a second track part comprising a plurality of tracks formed obliquely with respect to the longitudinal direction of the magnetic tape, in a second region different from the first region along the width direction of the magnetic tape.

Abstract: Digital data are stored on a magnetic tape at a bit rate which does not exceed the storage capabilities of the tape of about 80 Mbit/s, although received digital video signals have a bit rate of about 100 Mbit/s per channel in a two-channel system. In order to record such a bit-stream, the signals are applied to a head wheel having at least three transducer heads, and the bits are applied to the transducer heads in time-expanded form, the time-expanded signals being recompressed upon reproduction. Time compression and expansion is preferably carried out by buffer memories which have data entered and read-out in the FIFO method, at respectively different clock rates, switched under control of a control unit (24) which receives head wheel position input signal information.

Abstract: The same recording head or heads may be employed to record both an information signal and a synchronization word signal. Where at least two recording heads provide overlap intervals in the recording of the information signal, the synchronization word signal may be recorded in such overlap intervals. Upon playback, the synchronization word signal may be employed to control at least part of the reproduction of the information signal.

Abstract: This invention reduces crosstalk interference components without a significant increase in recorded bandwidth of the modulated audio signals and without a significant degradation of the signal-to-noise ratio of the reproduced audio signals. According to the invention, the nominal carrier frequency of the modulated audio signals in adjacent tracks or scans is offset by an amount sufficient to shift the crosstalk interference components outside the desired audio pass band for substantially all modulating amplitudes and frequencies. At the same time, the modulated audio frequency spectra of the adjacent tracks substantially overlap so that additional overall bandwidth requirements are minimized. A satisfactory offset from track to track is in the order of twice the maximum audio response frequency. As the offset is reduced or as occasional high frequency high amplitude audio occurs in adjacent tracks, crosstalk distortion components will tend to appear beginning at the high frequencies.

Abstract: The disclosed video-tape recording and reproducing apparatus, includes a system to transform the field signal into multi-channel signals; a number of modulators to produce modulated carrier waves, modulated by each of the multi-channel signals; a system to provide a fixed time delay to the modulated carrier waves, and also to mix the delayed carrier wave into the modulated carrier waves of neighboring channels as a cancellation signal for cross talk current; and a multi-channel head for recording and reproducing the output of the mixing system, to achieve elimination of cross talk current caused by interference between heads during recording. The delaying system includes delay lines to delay the modulated carrier waves a fixed time, and mixers to mix the delayed carrier waves with other channels' modulated carrier waves.

Abstract: The invention provides for the recording of an audio message and subsequent playback thereof and includes a facility for establishing whether the playback message is an authentic reproduction of the original message. The facility is obtained by producing a first data signal indicative of the audio message and recording it together with the audio message and producing a second data signal indicative of the playback message, and comparing the first and the second data signals to establish that the playback is an authentic reproduction of the original message if parity exists between the data signals.

Abstract: A digitized video data recording and/or reproducing system comprises a plurality of rotary magnetic heads are disposed on a rotary tape guide drum on the periphery of which a magnetic tape is helically transported at a predetermined wrap angle. A signal processing circuit divides a digitized video signal such that each horizontal scan interval thereof contains a plurality of data blocks, and a signal distributing circuit distributes the blocks of the digitized video data sequentially to the magnetic heads, so that every nth block of each horizontal scan interval is distributed to a respective one of the heads, where n is an even integer. Preferably, there are eight blocks in each horizontal scan interval, and every fourth block is distributed to a respective head.

Abstract: A hybrid audio frequency recorder employing digital signal processing techniques in the recording and playback sections combined with analog recording on the magnetic recording medium. For recording, the audio frequency signal is sampled and each sample converted to a composite digital word in parallel bit form. The word bits are separated into sub-words, the sub-words then being converted back separately into analog form for recording on separate tracks of the recording tape. On playback, the analog signals are reproduced from the separate tracks of the tape, converted into digital sub-words which are then combined to reconstitute the composite digital word representing the original amplitude of the audio frequency signal sample. Successive ones of the composite words are filtered to produce a faithful reproduction of the original audio frequency signal.

Abstract: A method and a circuit for transmitting or storing a wide-band signal in several, narrow-band channels, wherein frequency modulation and demodulation occur in the wideband channel. The uniformity of the transmission characteristics of the entire system is improved by obviating the necessity for multiple modulators and demodulators in the individual transmission channels.

Abstract: A method of recording and reproducing audio signals and corresponding visual signals in parallel tracks extending in the longitudinal direction on a magnetic tape, includes the steps of recording the audio signals in first and second primary tracks on opposite sides of the tape in the widthwise direction thereof; and alternately recording a first visual information signal corresponding to the audio signal in the first primary tracks and a second visual information signal corresponding to the audio signal in the second primary tracks in a single secondary track positioned in the center of the tape in the widthwise direction thereof, the first visual information signal being recorded in first information blocks in the secondary track and the second visual information signal being recorded in second information blocks in the secondary track in an alternating relation with the first information blocks such that only the first visual information signal is reproduced when reproducing the audio signal from the first

Abstract: Apparatus for simultaneously reproducing information signals that have simultaneously been recorded in four successive, parallel channel tracks on a record medium, with a first pair of first and second ones of the four channel tracks being adjacent to each other and having the information signals recorded therein with different azimuth angles and with the information signals recorded in one of the first or second channel track being delayed relative to the information signals recorded in the other of the first and second channel tracks, and with a second pair of the remaining third and fourth ones of the four channel tracks being adjacent to each other and having the information signals recorded therein with different azimuth angles; said apparatus including four magnetic heads movable in a direction along the four channel tracks for reproducing the signals recorded therein; and a tracking control circuit for controlling the relative positions of the four magnetic heads and the record medium so that the four

Abstract: A system and method of recording and reproducing wide band channel information by means of several narrow band channels involves sampling of wide band channel information, providing respective samples to corresponding narrow band channels wherein recording and reproduction take place, reproducing the narrow band signals, amplifying and shaping the reproduced narrow band signals, and then combining and amplifying the resulting narrow band signals to reproduce the original wide band signal. A preferred embodiment of the present invention involves dot interlacing the received wide band information signals in accordance with a derived sync signal to derive sample pulse outputs. Various embodiments are provided for shaping the reproduced narrow band channel signals in accordance with "phase modulation", "amplitude modulation", and "frequency modulation" modes of operation.

Abstract: Data representations are translated on a rotating disc utilizing multiple transducers at different radial positions. The disc is logically formatted into selected concentric bands. Within each band data representations are translated alternately in a repetitive sequence among a selected number of transducers characteristic of the particular band. By appropriately selecting band format parameters and increasing the characteristic number of transducers as a function of decreasing band radial position the track data density may be maintained within selected limits.

Abstract: A system for recording and reproducing a video signal, includes a converter for converting an incoming video signal into a number of signal channels, and a corresponding number of magnetic heads for recording and reproducing the signal channels in association with a magnetic tape. A circuit superimposes a pulse signal in the vicinity of the back porch of the incoming video signal prior to its conversion, and reconverting circuitry operates to reconvert the signal channels and combine them to provide a reproduced video signal. The superimposed pulse is separated from the reproduced video signal by appropriate circuitry, and the relative phase fluctuation between the separated pulse and a horizontal synchronizing signal to be added to the reproduced video signal is detected.

Abstract: Apparatus is provided for use in a digital video signal playback device of the type having a record medium in which plural channels of digital video signals are recorded in a like plurality of tracks. Plural transducers, such as playback heads, are associated with respective ones of the channels and reproduce the digital video signals from the plural tracks, each transducer normally reproducing a respective, predetermined channel of the digital video signals. A detector detects the particular channel with which the digital video signal reproduced by each transducer is associated. A signal interchanger is provided with plural channel outputs and is responsive to the detector for directing digital video signals which have been reproduced by transducers associated with channels which differ from the channels of the reproduced digital video signals to the proper channel outputs as determined by the detector.

Abstract: Whether for the recording of parallel or serially occurring information, the general concept of the invention is to record sample (or bit) data in the form of damped ringing signals (e.g. of the form (sin x)/x) and to provide relative delay between the recordings of adjacent tracks so that the principal peak of one recorded signal falls on a zero crossing of another, and vice versa. Since the peaks of no two adjacent signals occur--in the case, for example, of magnetic tape--at the same longitudinal position of the tape, isolation between the signals--as recorded on the tape--is effected. By suitably sampling the signals on the tape during playback, the original signal may be reproduced.

Abstract: In the disclosed recorder-player, an image signal is converted to multi-channel signals and a horizontal synchronizing signal is obtained therefrom by separating a synchronizing signal from the multi-channel signals to operate a flywheel oscillator, and by a loop in each channel in which a time base corrector in each channel operates a sync separator and in response to a coincident output from the sync separator in each channel and an output from the flywheel oscillator.

Abstract: A magnetic recording and reproducing device including two video tape recording and reproducing portions each of which have tape systems including supply reels, rotatable head drum assemblies, a tape drive capstan, a take-up reel, and wherein said tapes can be driven in either the forward or reverse directions and normally are driven intermittently and alternately in the forward direction and subsequently alternately and intermittently in the reverse direction with means for providing a longitudinal control signal on said tapes in both the forward and reverse directions as well as means for recording slant video tracks alternately on the tapes during a time when a particular tape is stopped and with adjacent slant tracks on one tape being the odd fields, and the adjacent slant tracks on the other tape being even fields, and wherein between each recording in one direction is spaced a sufficient distance apart from the next recording so that intermittent recording can be placed therebetween when the direction of

Abstract: Video signals are stored on a continuously movable magnetic tape with a dissection of the video signals into a plurality of partial signals and simultaneously recording the partial signals in a plurality of longitudinal tracks which extend parallel to one another. Inasmuch as mutual influences of the individual image formation to be stored are to be reduced, even given a great recording density, the signal lines of the video signal are employed as partial signals, whereby the line signals belonging to a television image are combined to at least one group and are successively recorded in groups. All line signals belonging to one and the same group are simultaneously recorded on a plurality of longitudinal tracks after an intermediate storage. The invention finds particular application in video recorders having longitudinal track recording.

Abstract: Moviola color picture quality is improved for a record and replay system wherein video sampled at a predetermined multiple of the color subcarrier frequency is recorded with each frame or field being disposed on a set of multiple tracks and with only a portion of the recorded information being intended for replay to reconstruct the color Moviola signal. Only pixel groups relating to entire color subcarrier cycles are recorded on the tracks so that a video signal having proper color information can be readily reconstructed therefrom during the Moviola mode. In one preferred embodiment, sequential color subcarrier cycle pixel groups are recorded on separate tracks with those to be replayed during the Moviola mode on a single track so that Moviola pixel groups on the single track can be repeated in sequence when reconstructing the Moviola picture and thereby supply instantaneously coherent information.