Abstract: In a tape drive system performing read/write operations on a tape by inserting a tape cartridge into a tape drive, the tape cartridge having a tape on which servo and data tracks are arranged longitudinally and a predetermined servo pattern is recorded on each of the servo tracks, a method and system for re-setting coefficients of a low-pass filter for servo control of the tape drive, each time the tape cartridge is inserted into the tape drive so that a servo system of the tape drive is stabilized. More specifically, the servo pattern is read from the tape in the cartridge inserted into the tape drive, frequency analysis for the read servo pattern is performed, a singularity that exceeds a predetermined spectrum range is detected from frequency components obtained by the frequency analysis, and the coefficients of the low-pass filter are set so as to cancel a power spectrum of the singularity.

Abstract: During recording, a multilingual indication is generated when at least two of the audio channels of a digital audio signal are associated with a common program, and the multilingual indication is combined with the digital audio signal. During reproduction, a display is activated when a multilingual indication indicates that at least two of the audio channels included in a digital audio signal are associated with a common program.

Abstract: The present invention discloses:

Abstract: An apparatus for recording a video signal while forming a great number of parallel tracks on a tape-shaped recording medium, and reproducing the video signal from the track, wherein for a specified picture on the recording medium, a processing code to be used in printing the picture is recorded on the recording medium in correspondence with the specified picture, whereby without recourse to an actual printing of the specified picture, it is possible that only the practice of recording the processing code for the specified picture of the tape-shaped recording medium suffices for starting a selecting operation for the next picture.

Abstract: A cassette houses a first and a second tape-like recording medium. The cassette is provided with a first and a second reel, at least a first tape guide provided between the first and second reels, a third and a fourth reel and at least a second tape guide provided between the third and fourth reels. The first tape-like recording medium is wound around the first and second reels via the first tape guide. The second tape-like recording medium is wound around the third and fourth reels via the second tape guide. The first and second reels may be arranged in a first direction in the cassette. And the third and fourth reels may be arranged in a second direction orthogonal to the first direction in the cassette. The cassette may have a first side face formed in the first direction and a second side face formed in the second direction, each side face having an opening through which data is recorded on or reproduced from the first or the second tape-like recording medium by a recording and reproducing apparatus.

Abstract: In a recording and reproducing apparatus, a plurality of audio signal areas and audio sub-code areas for recording audio mode information of the respective areas are provided on a recording medium in a record mode. The audio mode information corresponding to the audio signal area is detected from the audio signal sub-code in the reproduction mode.

Abstract: An additional information f2a previously superimposed repeatedly four times with a period shorter than the decoding period of a spread information on an information signal f1a by way of spectral spread is detected four times by way of an additional information signal detection section by way of inversion spread based on a spectrally spread PN signal f5a from a PN generation section, the coincidence detection section confirms coincidence of four detection results, and thus the superimposition of the additional information f2a is finalized, therefore the additional information f2a is detected within a short time because of a short period of the spectral spread, the additional information f2a is detected with high detection accuracy with a small spread gain by way of confirming the coincidence of four detections, and a write section can perform write inhibition properly based on detection of the additional information f2a.

Abstract: The present invention relates to an information providing system. More particularly, this invention relates to an information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus. The information management apparatus comprises a main information reproducing means for reproducing main information recorded in a given recording medium; and a reproduction management means for managing the main information reproducing means for reproducing the main information. The present invention provides a receiving means provided with a means for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing means provided with a reproduction disabling means for limiting the reproduction of main information.

Abstract: A digital signal recording and reproducing apparatus includes a plurality of heads. A digital signal containing an information signal is recorded on a recording medium via heads among the heads while tracks are sequentially formed on the recording medium. The digital signal is reproduced from the recording medium via heads among the heads. A reproduced signal processing circuit operates for processing the reproduced digital signal at a changeable data processing rate to recover the information signal from the reproduced digital signal. During the recording, a speed of the heads, a speed of the recording medium, a data rate of the recording, and a number of used heads are set to changeable values respectively. The digital signal and a mode signal representative of the set values are recorded on the tracks at approximately a predetermined constant recording wavelength.

Abstract: A signal recording apparatus is arranged to record main information in a first area provided in each of a multiplicity of parallel tracks formed on a tape-shaped recording medium, and an index signal in a second area of each of a predetermined number of continuous tracks, the second area being provided separately from the first area within each of the multiplicity of parallel tracks. The apparatus records, as the index signal, first index information in a first section within the second area of each of the predetermined number of continuous tracks, with either one of binary data being repeated continuously during a period corresponding to the first section, and second index information in a second section within the second area of each of the predetermined number of continuous tracks, the second index information including track data indicative of relation to a specific track among the predetermined number of continuous tracks.

Abstract: According to this invention, in reproducing data recorded on a recording medium, reproduction of the data is limited on the basis of the distribution order, regional limitations such as different principles, different values, and regulation of morals, and time limitations which are recorded on the recording medium. Accordingly, when data recorded on a recording medium is reproduced, reproduction of the data can be limited based on limitations recorded on the recording medium.

Abstract: An electronic memory apparatus for a device containing a recording medium for storing information. The device cooperates with a recording or reproducing instrument when said device is disposed therein, and is controllable by a data processing and control circuit. The memory apparatus has a first, programmable memory section, which is alterable by a user of the device, for storing data pertaining to the use of the device, and a second, programmable memory section for storing data pertaining to the characterization of the information which may be recorded on said recording medium.

Abstract: An interactive conversational apparatus provides seamless uninterrupted conversational responsiveness to a variety of user inputs utilizing a storage media having a plurality of temporally related data storage tracks containing interactive conversational content. The conversational content and control code information are stored on tracks in a timed sequence for providing interactive pathways through the tracks dependent upon various user responses. A media player facilitates playback of the interactive conversational content. A control code reader reads the control code information and generates track selection information based upon the control codes. User-input buttons or keys receive responses from a user based upon the interactive conversational content.

Abstract: A temperature sensing system for use in a computer disc drive comprises a themoelectric sensor having an output sensor voltage which is variable as a function of temperature, an interface circuit adapted to receive the output sensor voltage from the thermoelectric sensor and adapted to generate a scaled and level-shifted analog output voltage signal, and an analog-to-digital converter circuit adapted to receive the analog output signal voltage from the interface circuit and convert the analog output signal voltage into a digital signal which is compared to various defined thresholds.

Abstract: A disk sequencer in a headerless disk drive system includes a format calculator that performs arithmetic processing on a frame number to generate frame parameters that indicate the format of a data frame associated with the frame number. The disk sequencer then uses the frame parameters to identify boundaries of data segments during a read or write. Arguments of the arithmetic processing include the frame number, static parameters that indicate fixed field sizes, and zone parameters that depend on the track. The static and zone parameters can be transferred to the disk sequencer during initialization and a seek respectively. The arithmetic processing is completed during processing of a servo sector to permit zero latency accesses. In one embodiment, the zone parameters are less than two words per zone and include a byte count for an ending partial data sector and a number of full data sectors in a first frame.

Abstract: The present invention relates to an information providing system. More particularly, this invention relates to an information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus. The information management apparatus comprises a main information reproducing means for reproducing main information recorded in a given recording medium; and a reproduction management means for managing the main information reproducing means for reproducing the main information. The present invention provides a receiving means provided with a means for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing means provided with a reproduction disabling means for limiting the reproduction of main information.

Abstract: A signal transmission method applicable to prevention of modification or alteration of the playback mode information, such as copying management information or charging information. The playback mode information form a terminal 15P is data-converted for ciphering by a playback mode information appendage circuit 14 in a header appendage circuit 13 responsive to the key information from a terminal 15K and the resulting information comprised of the data and the playback mode information is outputted. The reproducing side effects data conversion on the ciphered playback mode information for deciphering, by a playback mode information detection circuit 26 in a header separation circuit 25, using the key information from a terminal 27K, for taking out the original playback mode information at a terminal 27P.

Abstract: A signal recording device is provided for transmitting recording data signals via a rotary transformer to a rotary drum having a rotary head for recording data so that control data may be transmitted in a shorter time period and resolution along the time axis may be improved. A 1-bit start bit SB and 2-bit mode setting bits PD are followed by 3-bit group bits GP and 3-bit channel bits CL for a single bit mode, by 3-bit group bits GP and an 8-bit bit patterns BP for a multi-bit mode and by a 4-bit channel number DAN and 8-bit data DAD for D/A data. An even parity PE is appended for each of the respective modes. A continuation flag CF is further appended for the single-bit mode and the multi-bit mode.

Abstract: In an recording and reproducing apparatus which is arranged to receive a plurality of kinds of input signals and record one of the input signals as a digital signal and also to reproduce and output the recorded signal, the kinds of the respective input signals are detected and permission or inhibition of the subsequent copying of the input signals is determined on the basis of their respective detected kinds. If the input signals contains a signal whose subsequent copying is beforehand permitted, copying of the signal is permitted, while if the input signals contains a signal whose subsequent copying is beforehand inhibited, copying of the signal is inhibited.

Abstract: A disk sequencer in a headerless disk drive system includes a format calculator that performs arithmetic processing on a frame number to generate frame parameters that indicate the format of a data frame associated with the frame number. The disk sequencer then uses the frame parameters to identify boundaries of data segments during a read or write. Arguments of the arithmetic processing include the frame number, static parameters that indicate fixed field sizes, and zone parameters that depend on the track. The static and zone parameters can be transferred to the disk sequencer during initialization and a seek respectively. The arithmetic processing is completed during processing of a servo sector to permit zero latency accesses. In one embodiment, the zone parameters are less than two words per zone and include a byte count for an ending partial data sector and a number of full data sectors in a first frame.

Abstract: The present invention provides an optical disk apparatus for recording predetermined data on an optical disk having a concentric or spiral track for recording data and a plurality of sector regions each having a predetermined track length. The apparatus includes interface circuit for acquiring user data to be recorded on the optical disk, error correction circuit and data generating circuit for adding first error correcting parity data to the user data acquired by the interface circuit to generate first recording data and adding second error correcting parity data to the first recording data to generate second recording data, and optical head for involving the second recording data, generated by the error correction circuit and the data generating circuit, in a light beam and emitting the light beam to the optical disk to record the second recording data on the optical disk.

Abstract: A recording system adds a track identification (ID) data for identifying each of the slant tracks, in units of GOP, on a tape during the recording of compressed video and audio data. A tape transport is controlled as a function of a longitudinal control signal recorded on a longitudinal track of the tape if a playback control head can normally reproduce the control signal. If, however, the playback control head cannot reproduce the longitudinal control signal, the tape transport is controlled as a function of a slant control signal containing the track ID data previously recorded on the tape. Hence, the tape transport is accurately maintained even if a problem occurs with the playback control head.

Abstract: An information recording and reproducing apparatus provided with the maximum likelihood decoding utilizes a standard deviation of difference metrics as an estimating function for adjustment for the purpose of achieving a short-time adjustment with a small number of samples. A regenerative clock and a reproduction signal outputted from the information recording and reproducing apparatus are supplied to a maximum likelihood decoder. Based on the estimated recorded series detected by the maximum likelihood decoder at a low error rate, a recording state detector generates a recorded bit series. Then, a standard deviation calculator operates to select a difference metric delayed by a detected amount by a display line from the difference metrics outputted from the maximum likelihood decoder and derives the standard deviation of the difference metrics. Then, a .sigma..sub.-- .DELTA.m/.mu..sub.-- .DELTA.

Abstract: A method and apparatus for implementing a noise generator in an integrated circuit read channel to optimize the performance of the signal channel. In the preferred embodiment resistors are used to generate noise. The noise source is buffered and the noise signal passes through a pre-amplifier stage. A differential current digital-to-analog converter controlled multiplier cell controls the amplitude of the noise signal. A switch connects the noise signal to a differential current output buffer, which is coupled to a signal channel.

Abstract: An interactive recording/reproducing medium including: image data; image reproduction control data which defines an operation instruction received from operation input apparatus and a reproduction procedure for the image data in correlation with each other, the operation input apparatus performing a reproducing operation for the image data in an interactive manner; image related data related to the contents of the image data; and relation defining information which defines the relation between the image related data and the image data. More particularly, an interactive recording/reproducing system which is interactively responsive to operations made by a user, which defines information such as text data (e.g., ASCII text) in association with an image and reproduces the text data simultaneously with reproduction of the image. An optical disk medium comprises a Video-CD recording area for recording image data (e.g.

Abstract: A signal reproducing apparatus operates on a magnetic tape on which information is recorded according to one of first, second, and third predetermined recording formats. The signal reproducing apparatus includes first and second heads. The first head reproduces a signal from the magnetic tape, and has a first predetermined azimuth angle. The second head reproduces a signal from the magnetic tape, and has a second predetermined azimuth angle different from the first predetermined azimuth angle. A first detector detects a level of the signal reproduced by the first head. First components are separated from the signal reproduced by the second head. The first components have frequencies in a first predetermined band. A second detector detects a level of the first components. Second components are separated from the signal reproduced by the second head. The second components have frequencies in a second predetermined band separate from the first predetermined band.

Abstract: A magnetic disk drive data storage disk defines recording tracks divided into data sectors by narrow servo spokes. A data sector lying between servo spokes is recorded with user data encoded in accordance with a code having a predetermined distance and user data code rate. Each servo spoke of the recording area has at least one servo information field encoded in a wide bi-phase code pattern. The disk drive further includes a synchronous sampling data detection channel having a data transducer head positioned by a servo-controlled actuator over the recording track, a preamplifier for receiving electrical analog signals magnetically induced by the data transducer head from flux transitions present in at least the servo information field, a digital sampler for synchronously sampling the electrical analog signals to produce digital samples, and wide bi-phase decoding circuitry coupled to receive digital samples from the synchronous sampling data detection channel for decoding the wide bi-phase code pattern.

Abstract: A video data storage apparatus includes a source of video data including a number of video cameras and digitizing circuitry. Two hard disk drives are provided in the apparatus for storing the video data. Also provided in the apparatus is an archive device such as a back-up tape unit. Video data is stored on one of the hard disks, while concurrently video data is copied from the other hard disk onto the tape backup.

Abstract: A recording apparatus in which a level of an input signal is adjusted by a variable gain amplifying circuit, and the input signal is recorded onto a recording medium. The level of the input signal is detected, a gain adjustment amount of the variable gain amplifying circuit is determined in accordance with the level of the input signal, a gain of the variable gain amplifying circuit is changed by the determined gain adjustment amount, and the gain adjustment amount is increased as the level of the input signal becomes larger. When the input signal level is low, therefore, the gain control amount is suppressed and, when a possibility such that the input signal level is the peak level of the music source is high and the input signal level is large, the gain adjustment amount is increased in accordance with the input signal level.

Abstract: An information recording/reproducing apparatus for recording or reproducing information on or from a recording medium in response to a command sent from a host computer has a cache memory serving as an intermediate memory and temporarily storing information to be transferred to or from the host computer. In response to an information record command sent from the host computer, completion of writing of information is reported to the host computer at the end of storing record data transferred from the host computer in the cache memory. The record data stored in the cache memory is written on a recording medium independently of data transfer between the host computer and intermediate memory. In response to an information playback command sent from the host computer, it is determined whether playback data requested by the host computer is consistent with unprocessed record data stored in the cache memory.

Abstract: Event debriefing systems and methods are provided for recording a plurality of datastreams related to an event. Each datastream includes chronological information related to at least one aspect of the event. An observer of the event may create time indication marks that facilitate recalling, during debriefing, what transpired at any particular point in time during the event. The recorded datastreams may be retrieved and presented beginning at marked time indications and continued chronologically thereafter in time synchronism.

Abstract: A data reproducing apparatus in which the identification information recorded in multiplicity on a recording track can be reliably reproduced assuring stable data reproduction including a decoder 61 to decode the area IDs supplied from an 8/10 demodulation circuit 43 and to supply each decoded area ID to counters C0 to C15, a system controller 70 to find the number of times of occurrences of coincidences of the area IDs of areas other than the end of data (EOD) area and, based on the frequency of detection of the occurrences of the area IDs by the counters C0 to C15, detects the area IDs of the (EOD) area. Finally, the system controller 70 controls the running of a magnetic tape 31 based on the detected area IDs.

Abstract: A digital signal recording method and apparatus for recording a digital signal on a recording medium by dividing the digital signal at intervals of a certain byte number, adding to each of the divided signals a synchronizing signal, a control signal including block address information, and an error detection and correction code to form signal blocks, and precoding each of the signal blocks in order to detect a partial response. Before the precode processing, the digital signal and the error detection and correction code are scrambled on the basis of the control signal, and the control signal is inverted.

Abstract: In a data transmitting/reproducing equipment, e.g., a digital audio tape-recorder, etc., adapted for transmitting data on an information transmission line such as a magnetic tape, etc. where a plurality of formats exist, and reproducing that data through the information transmission line, a scheme is adopted in this invention to guarantee an upgradable format having compatibility in which there are not only so called an upper compatibility but also a lower compatibility with respect to apparatuses already existing. To realize this scheme, on the transmitting or recording side, format ID information indicating a format of transmit data, and a plurality of compatibility ID information indicating compatibility of that format relative to other formats are generated and added to the transmit data, thus to transmit the transmit data on the information transmission line along with the format ID information and the compatibility ID information added thereto.

Abstract: A method and apparatus for signal threshold adjustment that compensates for signal asymmetry which utilizes an algorithm to detect each side of an asymmetric signal independently to ensure that the proper signal detection point is used on both the high and low side of the asymmetric signal. In particular, the high side threshold is adjusted downwards a predetermined amount until detected, the high side threshold voltage is then recorded and reset to the maximum value. Correspondingly, the low side threshold is then adjusted upwards the predetermined amount until detected, the low side threshold voltage is then recorded and reset to the minimum value. The algorithm may be repeated to continuously monitor a signal. The gain of the read amplifier can then be accordingly adjusted by the controller such that it approximately equals the peak of the amplified reference burst to the predetermined value.

Abstract: In a digital video tape recording and/or reproducing apparatus including a pair of rotary magnetic heads having a predetermined head width and gaps with mutually different azimuth angles which helically scan a magnetic tape as the tape is advanced in order to reproduce digital video signals that have been previously azimuth-recorded in oblique tracks on the tape, there is a tape transport that can transport the tape either at a standard speed or at a non-standard speed. If the tracks recorded on the video tape have a track width equal to the head width, then the tape is transported for reproduction at the standard speed, whereas, if the track width is different from the head width, the tape is transported at the non-standard speed. For example, if the track width is twice the head width, then the tape is transported at twice the standard speed.

Abstract: Methods of calibrating a helical scan recorder include transporting a storage media past a drum at a controlled linear velocity and recording tracks on the media using a write head. During a read-after-write operation, servo signals recorded on the track; are read. The servo signals from the tracks are used to determine an axial offset variance of the write head and a read head on the drum. In one mode, calibration is achieved for a first helical scan recorder which does not have a capstan, by installing a drum of the recorder in a second helical scan recorder, using the second recorder to record servo signals on two tracks, reading the servo signals from those two tracks, second recorder, using the servo signals to determine axial offset variance, and storing a value indicative of axial offset variance in a memory of the first recorder. The axial offset variance is used in a write splice operation and, in one mode, to determine linear velocity of the media.

Abstract: On tape carrying a mixture of a static image recording portion and a dynamic image recording portion, ID (identification) signals are recorded to specify only a specific static image for retrieval. During image recording, the PP (Photo/Picture) ID signal indicative of the static image recording portion is automatically recorded on the static image recording portion for a sufficiently long duration to allow its detection during quick search. When a desired static image is determined on the screen, the INDEX ID signal indicative of the static image is subsequently implanted only in the static image recording portion. Thus, the desired static image can be retrieved by first searching the PP ID signal quickly to locate the static image recording portion and then searching the INDEX ID signal in the static image recording portion. These two ID signals can also be subsequently implanted in the dynamic image recording portion to retrieve any one frame image.

Abstract: An optical disk apparatus has an optical pickup, a cosine equalizer having frequency characteristics including a boosting frequency for a frequency component which has a frequency that is about twice the frequency of an RF signal reproduced from recorded data with a shortest data length, and a digital signal processor for generating recorded data from the RF signal. Irrespective to the type of reproduced data from the optical pickup, the optical disk apparatus greatly increases the quality of the reproduced data as information transfer accuracy as compared with a conventional disk optical system.

Abstract: An apparatus for recording a video signal while forming a multiplicity of recording tracks in parallel on a tape-shaped recording medium, wherein camera information representing the operating state of a camera when shooting each picture is recorded in a position corresponding to the recorded track of that picture so that the operating state of the camera at the time of taking the video signal which has already been recorded can reappear. Therefore, in a case where a video signal is recorded in continuity with this recorded portion, the camera operating state is controlled in a joint portion of these to improve the continuity in this joint portion.

Abstract: A method of controlling a magnetic disk unit. The method controls the magnetic disk unit which comprises a disk enclosure part and a printed-circuit board part. The disk enclosure part includes at least one magnetic disk, at least one magnetic head and a mechanical part for driving each magnetic disk and each magnetic head. The printed-circuit board part includes a circuit part for controlling the disk enclosure part. The method includes the steps of writing on the magnetic disk version data indicating a type of disk enclosure part after the disk enclosure part and the printed-circuit board part are assembled, and automatically setting the circuit part of the printed-circuit board part depending on the version data which is read from the magnetic disk after the magnetic disk unit is completed.

Abstract: An information processing method and system in which coded or incomplete information is transmitted through a space or through a predetermined transmission line and is received by a user. A program or data needed to demodulate the information is read out from a recording medium, and the received information is demodulated using the read out program or data.

Abstract: A signal recording apparatus is arranged to record main information in a first area provided in each of a multiplicity of parallel tracks formed on a tape-shaped recording medium, and an index signal in a second area of each of a predetermined number of continuous tracks, the second area being provided separately from the first area within each of the multiplicity of parallel tracks. The apparatus records, as the index signal, first index information in a first section within the second area of each of the predetermined number of continuous tracks, with either one of binary data being repeated continuously during a period corresponding to the first section, and second index information in a second section within the second area of each of the predetermined number of continuous tracks, the second index information including track data indicative of relation to a specific track among the predetermined number of continuous tracks.

Abstract: A disc recording device for recording a first information signal and a second information signal, e.g. a pilot signal, on a disc-shaped recording medium comprises an optical pick-up having first and second laser diodes for recording the first and second information signals on the disc-shaped recording medium, a first modulator for modulating the first information signal at a first frequency, a first laser diode modulator for driving the first laser diode based on a signal outputted from the first modulator, a generator for generating the second information signal of a second frequency and a second laser diode modulator for driving the second laser diode based on the second information signal.

Abstract: A recording apparatus has a check-after-write function for reproducing and checking the recorded state of a recorded track. When overwriting of data is started, an identification number to be stored in a track is set at a fixed value, and check-after-reproduction is performed by the fixed value during reproduction in which a check is made. Also, a reproducing apparatus includes a system for detecting that a very small error segment has occurred on the data and for making the data of the error segment invalid or not outputting the data when it is determined that the error segment has occurred.

Abstract: A data processing system (10) is disclosed which comprises a microprocessor host (12) coupled to a decoding system (14). A host interface block (18) receives a bit stream and passes bit stream on to a system decoder block (20). The system decoder block (20) extracts the appropriate data from the bit stream and loads an input buffer (24) or an optional external buffer (26). An audio decoder block (28) retrieves the data from the input buffer (24) and generates scale factor indices, bit per code word values and subband samples which are stored in an arithmetic unit buffer (30). A hardware filter arithmetic unit block (32) retrieves the information from the arithmetic unit buffer (30) and dequantizes, transforms and filters the data to generate PCM output data which is loaded into a PCM buffer (34). The data within the PCM buffer (34) is output by a PCM output block (36) to a digital-to-analog converter (16).

Abstract: A magnetic disc apparatus using an electric filter for waveform equalization of a read signal is provided. The optimum parameters are set for every head and the writing and reading operations are executed on the basis of the optimum characteristics. At the start of the use of the apparatus, the control information of the circuit parameters previously recorded on a magnetic recording medium is read out, thereby forming a set value table in which the optimum values of the circuit parameters including at least the electric filter have been stored every magnetic head. After the table was formed, prior to the writing or reading operation, the contents of the set value table corresponding to the designated magnetic head are read out and the circuit parameters of the circuit section including the electric filter are controlled and optimized on the basis of the contents read out.

Abstract: There is provided a recording/reproducing apparatus, e.g., digital video tape recorder, etc., applicable to a transmission system sufficiently utilizing communication capacity. The recording/reproducing apparatus comprises a recording element (e.g., rotary head) for recording, onto a recording medium (e.g., magnetic tape), time base compression processing implemented digital data delivered from the external, e.g., broadcasting station side, etc.; a control circuit for carrying out a control to read out the digital data from the recording medium at a speed lower than a recording speed in dependency upon the time base compression processing implemented to the digital data; and an output circuit for outputting, as a reproduced output, digital data which has been read out from the recording medium.

Abstract: A recording and reproducing apparatus is capable of editing video signals and audio signals recording additional information data for controlling the reproduction output level. The recording side includes an additional information data generating circuit, a time division multiplexing circuit for time-division multiplexing a video signal data and audio signal data and the additional information data, and a recording head. In independent areas on a recording medium, the video signal data, audio signal data and additional information data are individually recorded. The reproduction side includes a reproduction head, a data separation circuit for separating the video, audio and additional information, an additional information data detecting circuit for producing output level data, and a circuit for controlling the levels of the reproduced video and audio signals depending on the output level data.

Abstract: A time lapse magnetic recording/reproduction apparatus for recording and reproducing picture signals while intermittently thinning them out in a frame unit is used for monitoring and burglar-proofing in plants, shops, banks, etc. Recording picture information is generated and added to one continuous picture signal obtained by sequentially switching the output of each video camera, and is then recorded. A speed multiple k for a normal tape travelling speed is optimally set by servo circuit on the basis of the recording picture information (the total number m of channels) detected from the reproduction picture signals reconstructed by double-azimuth four heads at the time of search reproduction, and a search reproduction picture throughout the full screen of a monitor television is obtained in full recording channels.