Abstract: In a storage medium, data for controlling a recording and reproducing apparatus is stored in a management database recording region provided in recording tracks. Management data recorded in the management database recording region can include various types of management information, such as erase permission or inhibition, information indicating whether the program recorded in the recording tracks has been reproduced, external unit control data for controlling cooperating apparatus, subscriber data corresponding to a respective program, a recorded flag for redesignating recording reservation information corresponding to a recorded program as recorded program information and character display information for depicting a personified guide character for an interactive display.

Abstract: A moving image processing method and apparatus for efficient access to a large amount of moving image data. By the hierarchical structure of storage media for storing the compressed moving image data, when reproduction of compressed moving image data is displayed, the data can be transferred with an adjustment of the transfer speed to a predetermined display speed of the moving image. More specifically, the compressed moving image data is transferred from a first storage medium having a large capacity and a slow access speed to a second storage medium having a small capacity and a fast access speed and further transferred from the second storage medium to an expander which expands the data and displays the expanded data. The compressed moving image data and the corresponding administrative information are stored separately in different storage media which are accessible independently of each other.

Abstract: A system for making multiple duplicates of live program material or dubbing from a master cassette comprises a central control panel for operating a master deck and simultaneously controlling a plurality of slave decks. Operation of the system selectively in live performance recording and dubbing modes of operation is controlled from separate switches at the control panel while override circuitry prevents recording on the master if live performance recording and dubbing operation switches are operated simultaneously. Each deck includes a pivotable cassette lid and a pack switch responsive to the lid to control the corresponding deck independently of the others enabling recording from live programming to be staggered in time among multiple cassettes. During dubbing, when both the master and slave decks are to be operated, the master deck is delayed upon start-up for a duration sufficient to compensate for the nonrecordable leader portion of the slave cassette.

Abstract: A magnetic tape for the recording of digital video signals is constituted by a nonmagnetic base having thereon a magnetic layer of at least one thin magnetic metal film which has an energy product of at least 100 G.cm.Oe, and with the surface roughness of the magnetic tape being at most 0.003 .mu.m in center line average height. Such tape, when used with magnetic heads each having a gap defined between portions of the respective head having a saturation magnetic flux density of at least 14 kG., contribute to the maintenance of an acceptable raw error bit rate below 1.times.10.sup.-4 when recording with a recorded bit area of no more than 1.25 .mu.m.sup.2 /bit.

Abstract: A method of manufacturing a replicated magnetic reproduction medium, such as a magnetic-tape cassette provided with a music recording, which reproduction medium includes a magnetic tape having a plurality of tracks extending parallel to one another in the longitudinal direction at specified spacings within certain limits from one another. The reproduction medium thus manufactured serves for the reproduction of the replicated signals by a magnetic reproducing head having a plurality of transducing gaps situated at specified spacings within certain limits from one another. During reproduction, a specified normal tape tension within certain limits is sustained, resulting in a normal surface pressure between the tape and the head face of the reproducing head.During replication the tape is moved over a head face of a magnetic replication head also having a plurality of transducing gaps with a certain spacing from one another.The the tension in the tape is increased relative to the normal tension.

Abstract: A processing system and a recording/reproducing system for a digital signal including a digital video signal and a digital audio signal. Upon transmission, the digital signal is transmitted after time-base compression and modulation. The transmitted signal is received and demodulated. In the case where the signal is to be transmitted to a plurality of recording/reproducing systems, address signals designating ones of the plural recording/reproducing systems and a control signal for controlling the start/stop of recording are transmitted. The recording by the recording/reproducing system is controlled so that it is made with the same format in either normal-speed or high-speed mode or in either normal or multiple recording mode.

Abstract: A recording control apparatus for use with a tape recorder. The apparatus comprises a recording circuit selectively activated; a clock generating means for generating control clock pulses that provide the basis for controlling the recording circuit; a counting means for counting the control clock pulses; a counter setting means for initializing the counting means; a recording circuit control means for controlling the recording circuit in accordance with the output of the counting means; and a control means for supplying the counter setting means with initial values from which to start the counting before predetermined points in time at which to start and stop recording. With time monitored by the clock generating and counting means, the burdens on the computer in its performance are alleviated.

Abstract: Disclosed are an editing apparatus and a method in a vide tape duplicating system for effectively editing using an automatic search function of the starting and ending points of a program to be edited. The editing apparatus includes a key input, an edit adjuster, a playback system, a recording system, a display and a system controller. The edit adjuster controls the editing operation to allow a playback signal within a preset editing section output from the playback system to be recorded on the recording system in accordance with the output signal of the key input. The editing method is performed by a first editing step of setting starting and ending points for at least one editing sections on a recording medium in the playback driver, and controlling the editing operation by the detection of the starting and ending points marking information on the editing section which is randomly set from points between the initial point and the final point of the recording medium.

Abstract: A video signal is duplicated in a reduced time by using n video tape recording devices having rotary heads reproducing the video signal from respective recording media at a normal rotary head rotational speed and transporters transporting the respective recording media at n times a normal transport speed. The reproduced video signals are offset from each other by one frame of the video signal, and are timebase compressed, selectively delayed and combined into an n times normal speed reproduced signal, that is, a video signal with its timebase compressed by 1/n. The n times normal speed reproduced signal is recorded by at least one video tape recorder on a recording medium at an n times normal recording speed, thereby duplicating the original video signal. An audio signal may also be duplicated in this manner.

Abstract: A method of and apparatus for recording information from a master medium onto a slave medium. In one embodiment, digital information on a master medium is reproduced and stored at a first rate, typically at real time, in a first high speed digital storage device such as a magnetic disk drive. The digital information stored in the first storage device, when needed, is transferred at a second rate, much higher than the first, to a second digital storage device in which it is stored until it is scheduled for duplication, at which time the digital information is repeatedly played back at a third rate, much higher than the first rate and slower than the second rate, is converted from digital information into analog information and applied to a duplicating device for recording the analog information onto a slave medium.

Abstract: A cassette autochanger for automatically supplying and selectively reproducing a plurality of cassettes (C) having programs recorded therein comprises a plurality of recording/reproducing devices (3), a plurality of cassette storage locations (5, 6), a cassette transporter (4, 9) for transporting the cassettes (C) between the locations (5, 6) and the devices (3), a first detector (23) for detecting any one of the programs that is recorded in one only of the cassettes (C) , a second detector (23) for detecting two of the devices (3) which are available for use, and a dubbing controller (24) for controlling the two detected devices (3) so that such one of the programs is automatically dubbed on to another cassette (C) using the two detected devices (3).

Abstract: A recording/reproducing system for use in a digital audio tape recorder using memory functions and a method thereof which are capable of storing reproduced aural signals in a memory bank, and capable of reading and recording the stored aural signals without the use of an additional DAT system. The system includes a memory section for storing signals that are input to a D/A converter from a digital signal processing section, and a memory controlling section for storing signals that are input to the D/A converter from the memory section, and for reading and applying the signals stored in the memory section to the digital signal processing section. As a result, the system and the method for recording/reproducing can duplicate a tape with one DAT by storing reproduced signals in the memory when the DAT is in are producing mode and reading and recording the stored signals in a tape.

Abstract: In accordance with an illustrative embodiment of the present invention, a magnetic tape which has seismic data thereon and which has been stored for so long that stiction is a problem is temporarily placed in an environmentally sealed room and subjected to a temperature of about 140.degree. F. and a relative humidity of 20% or less for about 48 hours. After removal from the room and cooling down to ambient temperature of about 70.degree. F. in the presence of relative humidity of about 50%, the tape is cleaned and retensioned on a reel. The data then can be read out onto another media with recovery of practically 100% of the seismic data.

Abstract: When dubbing information from a first recording medium to a second recording medium, control information including a start ID is recorded at appropriate timing. For example, when the fourth music selection recorded on a CD is reproduced for recording on a magnetic tape, the reproducing operation is started at a position (4, 00, 36) (represented by data TNC, INDEX, and FRAME) preceding the start position (4, 01, 46) of the fourth music. When a position (4, 00, 40) is detected, a record directing signal for directing the recording of the start ID is output to a digital magnetic tape recorder selection. This ensures the recording of the start ID prior to the recording on the magnetic tape of the start position of the fourth music selection.

Abstract: Information reproduced and output from an information reproduction device such as a CD player is recorded and thereby copied by an information recording device such as a cassette deck. Once a desired dubbing has been completed, the recording medium such as a CD accommodated in the information reproducing device is automatically discharged.

Abstract: A copy timing control circuit capable of concurrently controlling a copy operation timing of one video deck by application of control signals supplied from a mode switch of the other video deck as well as a timing signal thereof.

Abstract: An apparatus and method for automatically selecting and recording in the double-deck VCR one of may programs on a tape of a first deck to a tape of a second deck. The apparatus and method include displaying upon activation of a mark service key by a user, a message instructing the user to select a desired program to be recorded by using number keys, detecting a mark signal at a starting point of a program recorded in the tape of the first deck by fast forward operation of the tape of the first deck, determining whether a mark signal counter value equals a program number, and performing playback mode in the first deck and copy mode in the second deck to automatically copy the selected program in the tape of the first deck to the tape of the second deck.

Abstract: An apparatus and method for automatically self-configuring a disk drive to a disk duplicating machine and master image to be reproduced. A printed circuit board for the disk drive includes a non-volatile memory for storing information relating to the disk drive capabilities, and information relating to the manufacture of the disk drive, and information relating to the usage of the disk drive. The disk duplicating machine may access and modify information in the non-volatile memory.

Abstract: There are provided an error correction circuit for correcting a code error of a compressed information code train having been reproduced from a recording medium, compressed in information amount by compression encoding, and added with an error correction code, by using the error correction code, an expansion circuit for subjecting the compressed information code train outputted from the error correction circuit to decoding corresponding to the compression encoding, and expanding the information amount of the decoded code train, an error concealment circuit for concealing an information code of the information code train outputted from the expansion circuit, by using correlation of the information, the information code being unable to be corrected, and a compression circuit for compression encoding again an information code train outputted from the error concealment circuit.

Abstract: A video tape recorder with the function of repetitive playback mainly used for learning purposes detects whether a recordable tape or a playback only tape is used as a master tape when driving independently two video tapes with tape ends to be used as a slave tape and a master tape, respectively. When it is detected that a recordable tape is used, at first the two tapes are simultaneously driven in a recording condition by manipulating a record button and then a desired range of the slave tape is repeatedly rewound and replayed by pressing and releasing a playback button for a required time period. When it is detected that a playback only tape is used, on the other hand, only the slave tape is driven in a recording condition by a similar manipulation, and while the slave tape is repeatedly rewound and replayed, the master tape playback operation is suspended.

Abstract: A continuous both-side playback type video disc apparatus having an external command signal generator for generating an external command signal to an external recorder in response to a playback start signal or a lead-in or lead-out track detection signal obtained from a signal reading head, and also an external command signal output terminal for supplying the external command signal therefrom. Synchronized operation control is executed in such a manner that, upon completion of playing back one side of a disc, the recording operation of the external recorder is temporarily brought to a halt by a pause signal at the instant of detection of the lead-out track by the signal reading head, and after proceeding to playback of the other side of the disc, the recording operation is resumed at the instant of detection of the lead-in track on the other side of the disc by the signal reading head.

Abstract: When recording n pieces of music on a magnetic record carrier (3), two groups of pieces of music are formed. A first group of g.sub.1 pieces of music is recorded on the A-side of the record carrier and a second group of g.sub.2 (=n-g.sub.1) pieces of music is recorded on the B-side. The groups are selected such that the total time duration of each of the two groups T.sub.tot (g.sub.1), T.sub.tot (g.sub.2) is nearest to half the total time duration of all the n pieces of music (T.sub.tot /2).

Abstract: A magnetic tape for the recording of digital video signals is constituted by a nonmagnetic base having thereon a magnetic layer of at least one thin magnetic metal film which has an energy product of at least 100 G.cm.Oe, and with the surface roughness of the magnetic tape being at most 0.003 .mu.m in center line average height. Such tape, when used with magnetic heads each having a gap defined between portions of the respective head having a saturation magnetic flux density of at least 14 kG., contribute to the maintenance of an acceptable raw error bit rate below 1.times.10.sup.-4 when recording with a recorded bit area of no more than 1.25 .mu.m.sup.2 /bit.

Abstract: Apparatus and method for monitoring audio track playbacks by an optical disc audio reproduction device. A track number corresponding to an audio track encoded on an optical disc is selected to initiate playback of the selected audio track and a corresponding track number is stored in a first memory device. A series of data frames, each having an audio data block and a non-audio subcode block containing a single Q data bit, which define the selected audio track are then read from the optical disc. The data frames are transmitted to a demodulator circuit where the non-audio subcode block is separated from the audio data block. The non-audio subcode block is then transmitted to a microprocessor where the single bit of Q data subcode from each frame is assembled into a Q data subcode block. A portion of the Q data subcode block which contains a UPC code identifying the optical disc is transmitted to a second memory device.

Abstract: A method and apparatus is used for dubbing a recorded video tape simultaneously with the playing back of the recorded video tape from the initiation of the playback.

Abstract: A method for controlling a double-deck VCR during a tape duplication operation includes the steps of sensing the recording speed of a tape in an A deck, determining if an input signal for establishing a recording speed to be used by a B deck during the copying operations is provided, and transmitting the established recording speed to the B deck. When an input for establishing the recording speed is not provided, the recording speed of the tape in the A deck is selected as the established recording speed and is transmitted to the B deck. The sensing step includes the step of displaying using OSD (on-screen-display) characters displayed on a display device, the recording speed of the tape in the A deck. The determining step includes to step of displaying the established recording speed using corresponding OSD (on-screen-display) characters on the display device.

Abstract: An arrangement for reading a digital audio signal from a master medium (7) and storing it in a digital storage medium (10, 90, 90') at a first bit rate in a first step, and for repeatedly reading the digital audio signal from the storage medium and recording the digital audio signal on a recording medium (20') at a second bit rate in a second step. The digital storage medium is adapted to store a digital information signal which is a representation of a first music program (M1) and a digital information signal which is a representation of a second music program (M2). The arrangement (FIG. 1b) is further adapted to repeatedly read the digital information signal representing the first music program from the digital storage medium while reading the digital information signal representing the second music program into the digital storage medium in the second step.

Abstract: A tape conveying device has a loop bin which accomodates a meandering endless tape. The tape loop bin comprises a tape drive means, a tape running speed detecting means for detecting the running speed of the endless tape from the operating condition of said tape drive means, a tape conveying means for conveying the endless tape to meanderingly run in said loop bin to an exit from said loop bin, and a tape conveying control means complying with a running speed signal of the endless tape received from the tape running speed detecting means. Endless tape fed into the loop bin by a tape driving means travels toward an outlet from the loop bin. The tape conveying means is controlled to comply with a tape running speed signal sent from the tape running speed detecting means so that the operation of the tape conveying means is stopped before movement of the endless tape is stopped.

Abstract: A triple deck recording and reproducing system with three video tape decks are integrated, and mounted within a single video tape recorder, when performing recording and reproducing, a main picture is displayed by selecting one among VHS or 8 mm or 4 mm of the video decks and another picture is displayed in the form of a PIP (Picture-In-Picture). Thus, the selected main and auxiliary pictures can be mixed with another deck for dubbing recording, and then, a user can display all the signals reproduced by three decks on the PIP, so as to compare the pictures with each other and display a plurality of the different pictures as a particular effect.

Abstract: A duplicate recording system uses video cassettes for storing master library recordings. On both the recording and the duplicating ends of the system, all signals are buffer stored in an electronic memory while the signals are in a digital form. This buffer storage completely isolates the recording/reproducing steps so that the usual parameter of restraints disappear. For example, the duplication ratio may be any value within the capabilities of the recording/reproducing machines. This isolation eliminates expensive setup procedures heretofore required to switch from one to another duplicating ratio. The buffer storage also provides a more precise transfer with greater fidelity of the recorded signals. A computer calculates a smoother analog curve when the digital-to-analog conversion is made.

Abstract: A duplicator system is provided which transfers information signals such as video signals recorded on a mother tape to a copy tape. This duplicator includes a counting system to manage the life of a mother tape. The counting system is operable to count the number of traveling cycles of the mother tape traveling through a preselected tape path and records data indicative thereof on a preselected section of the mother tape. Thus, an operator can easily read out the data indicative of the total number of traveling cycles from the mother tape to confirm the remainder of the working life thereof.

Abstract: A video cassette recorder and taping system is disclosed in which two video cassette decks are included within a single housing. Selection switches are provided so that a prerecorded tape may be displayed from a tape located in one video cassette unit deck while one of a plurality of inputs is being recorded on another video tape located in the second video cassette unit deck.

Abstract: A disk drive device is disclosed including a supporting mechanism for supporting a plurality of magnetic disks, a single motor, and a transmitting mechanism. The supporting mechanism comprises a plurality of bearing mechanisms, each of which rotatably supports each of the magnetic disks, respectively. Each bearing mechanisms is formed as a tube, and a rotatable shaft is connected to each disk and rotatably supported in each tubular bearing mechanism. The rotatable shaft is provided with grooves which generate a pumping effect when a fluid is passed therethrough, whereby the rotatable shaft is supported in the tubular bearing mechanism without friction therebetween. The transmitting mechanism comprises an endless belt for transmitting a rotation of the motor to the supporting mechanism.

Abstract: A device is for specifying and calculating a reproduction time of an optical disk player such that the reproduction time is specified and calculated to coincide with a recording length of one side of a magnetic tape. The optical disk player reproduces audio information stored on an optical disk in the form of a plurality of recorded audio segments. The magnetic tape is used to record at least one of the plurality of recorded audio segments reproduced by the optical disk player.

Abstract: A videocassette deck and taping system includes two videocassette decks therefor (A and B) included within a single housing utilizing a common power supply, tuner, controls, and switching and control circuitry to enable simultaneous multiple functions using both decks and to also enable tape to tape duplication (dubbing) in a manner avoiding degradation of video information content, as well as additional function selection.

Abstract: An audio visual apparatus of the invention has a standard cassette tape (T-2) having record-prevention tabs and an endless video cassette tape (T-1). When the cassettes are installed in two VCR units, respectively and a power switch is turned on, the T-1 and T-2 tapes are set to a recording mode and start recording a TV program. When a remote control button is pressed once, the T-2 tape continues recording while the T-1 tape is set to a playback mode in which video information from a TV is allowed to be monitored endlessly. When the remote control button is pressed once again, the T-1 tape is brought back to the recording mode. A series of the actions can be repeated. On the other hand, when an already recorded cassette tape with tape ends not having record-prevention tabs is installed as a T-2 tape, the T-2 tape is set to a playback mode while a T-1 tape is set to a recording mode, simultaneously while a power switch is turned on so that the T-1 tape records the video information of the T-2 tape.

Abstract: In a recording apparatus for a mirror mother tape to be used in a contact-type magnetic printing process, a chrominance signal of an incoming color video signal is converted into a down converted chrominance signal having a reduced frequency fC, a beat cancelling signal having a frequency 2fC is generated from the down converted chrominance signal, the beat cancelling signal is added to a luminance signal of the incoming color video signal thereby generating an added signal, and the down converted chrominance signal is combined with the added signal to provide a composite signal which is recorded on a mirror mother tape.

Abstract: A copy protection arrangement for pre-recorded videotape cassettes. The invention includes both a method of protecting and a protected videotape cassette. Copy protection is provided by recording on at least a portion of the original videotape a composite synchronizing signal including a vertical synchronizing pulse having a pulse width in the range of 1-20 micro-seconds and a pulse height discernible by a vertical synchronizing signal separating circuit of the television receiver. All other vertical synchronizing pulse in the vertical synchronizing signal partition, all the equalizing pulses in a equalizing signal partition following the vertical synchronizing signal partition and at least a part of the horizontal synchronizing pulses in a horizontal synchronizing signal partition following the equalizing signal partition in the composite synchronizing signal having respective pulse height less than a predetermined pedestal level of the synchronizing signals.

Abstract: A dubbing apparatus for reproducing plural pieces of music recorded on an optical disc and a recording device for recording the reproduced music signals supplied from the reproducing device onto a magnetic tape. When the total recorded time of music on the disc is longer than the recordable time of the magnetic tape, the recording device stops recording each time the reproduction of each piece of music is finished, rewinds the magnetic tape for a specified period of time, and then starts recording the next piece of music while performing fade-in and fade-out actions on the two adjacent pieces of music during this overlapped recording period, thereby reducing the overall music recording time. This allows all pieces of music on the disc to be dubbed into the magnetic tape within the recordable time of the latter.

Abstract: A dubbing apparatus for dubbing signals in which recording information, such as a distinction between the field picture and the frame picture, the track number, the date of shooting, etc. is multiplexed with compound video signals of a still picture. Revising data is inputted for instructing the revision of recording information. A decoder decodes the recording information to be dubbed. New recording information is prepared on the basis of the revising data and the decoded recording information. An encoder encodes the new recording information, while a modulating circuit modulates the encoded recorded information. A frequency modulation circuit frequency modulates a video signal that is to be dubbed, while a synthesizing circuit multiplexes the modulated recording information and the video signal. The multiplexed signal is recorded on a recording medium, so that it is possible to revise recording information at the time of dubbing.

Abstract: A dual deck video cassette recorder, having first and second video decks in a common housing. Each deck has a plurality of heads and both of the decks can playback, and at least one of the decks can record. A switch arrangement is connected to both decks to provide for selective connections of video and audio signals between, and from the inputs to and outputs from, the two decks. A sensor detects the angular position of the heads of each deck to assure they are in phase prior to initiating recording. A mechanism corrects the angular position of the heads of at least one of the decks to assure the heads of each will be in the same angular phase prior to initiating recording. A circuit detects a copy protection signal on a tape in one deck during vertical blanking and the signal is located and timed so that it will not interfere with normal operation of the video signals, to produce a quality picture on a TV monitor or place information onto tape in one deck which provides a quality picture.

Abstract: A digital audio signal is reproduced from a master medium (7) and stored in a digital storage medium (10, 90, 90') at a specific first bit rate, after which it is read from the digital storage medium and recorded on a recording medium at a second bit rate. The digital audio signal, in the form of a first digital information signal having channel words of n data bits, is stored in a track (Ta.i) on the master medium. This signal is converted in an n-m demodulator (9, 15), the n-bit channel words being converted into m-bit information words, where n>m. After this the signal is stored in the digital storage medium (90, 90') as a second digital information signal. After read out from the storage medium (90, 90') the second digital information signal is converted into a third digital information signal, which substantially corresponds to the first digital information signal, in an m-n modulator (11, 36), in whcih the m-bit information words are reconverted into n-bit channel words.

Abstract: Open spool reels (18) of magnetic tape (7) are recorded with a plurality of different programmes interspersed with recordings in a different form (typically as interruptions to the sync track), representing data information concerning the programme material and production history of the recording. The data (6) recorded on the tape (7) is read by a transducer (39) on a cassette loading machine (30) and used to control the operation of the loading machine, identifying the length of tape and the position on the tape where splices between the magnetic tape (7) and leader tape in cassette shells is to be made. The data (6) also controls a label printer (46) to produce a printed label, typically in bar code form, carrying information representing the programme material on the tape loaded into the cassette.

Abstract: A data copying method comprises the steps of checking a starting track address and an end track address which are used for controlling a copying of a data from each set of several recorded tracks in a master disk to a slave disk having several unrecorded tracks only so as to store the starting track address and the end track address for each of the recorded tracks, reproducing the data from each of the recorded tracks in the master disk repeatedly for each recorded track to supply a reproduced data signal from the data, and recording and reproducing data signal onto the slave disk at its track addresses corresponding to those addresses of the recorded tracks in the master disk repeatedly for each recorded track in the master disk storage medium, the recording of the reproduced data onto the slave disk being stopped at track addresses of the slave disk corresponding to those addresses of the unrecorded tracks in the master disk.

Abstract: This invention relates to a time code recording and reproducing apparatus for recording and reproducing time codes corresponding to a digital signal. Time code converting means (100) converts a first time code into a second time code. A frame phase which occurs during the recording of input information is determined by frame timing generating means. A phase difference between a frame of the second time code and a recording frame is detected by phase difference detecting means (103). Phase difference correcting means (104) outputs a third time code on the basis of the detected phase difference. The input information is recorded together with the third time code. Thereby, the recording can be performed while the relation of the correspondence between the input information and the time code is held. In addition, the reproduction can be performed.

Abstract: Two tape decks are connected to a player that plays back a recording medium. The reproduced sound is recorded on two magnetic tapes by the tape decks operating in parallel. During the recording, one of the decks stops earlier than the other because of difference in tape length and issues a tape-end signal. In response to the tape-end signal, the player is controlled to search for and reach the last recorded piece of music while the tape decks are rewound, paused or otherwise controlled singly or in combination in a suitable time sequence. This makes it possible to edit the tapes of different lengths during continuous recording without leaving blank periods on either tape.

Abstract: A digital information signal reproducing apparatus is provided, in which a relative speed between a recording medium in which a digital information signal is recorded and a reproducing device for reproducing the digital information signal from the recording medium is selectively changed. Even when the multiple of the over-sampling digital filter is switched in response to the switching of the relative speed, the frequency characteristic of the analog low-pass filter need not be changed. Thus the circuit arrangement of this digital information signal reproducing apparatus can be simplified.

Abstract: A video system is arranged to record, on a second recording medium of a relatively small capacity, a given period portion of a video signal relating to an image plane representing each of varied programs included in the video signal and information on a recorded position of each of the programs on a first recording medium which has a relatively large capacity.

Abstract: A videocassette deck and taping system includes two videocassette decks therefor (A and B) included within a single housing utilizing a common power supply, tuner, controls, and switching and control circuitry to enable simulataneous multiple functions using both decks and to also enable tape to tape duplication (dubbing) in a manner avoiding degradation of video information content, as well as additional function selection.

Abstract: A magnetic tape recording and playback device records or plays back a signal using a tape, in which a top portion thereof is connected to a leader tape which is non-magnetic substance.