Abstract: Included are: an information management system that manages monitoring-target condition information output from condition-monitoring target devices; cameras that are incorporated in respective train cars and take images of the condition-monitoring target devices; a transmission device that is connected to an in-train transmission channel and transmits imaging data from the camera; a camera-control central device that is connected to the information management system and the transmission device, monitors the monitoring-target condition information sent from the information management system, determines whether the condition-monitoring target devices are in a normal condition, and generates a frame-rate control signal for adjusting a frame rate of imaging data; and a camera-control terminal device that is connected to the transmission device and the camera and adjusts the frame rate of imaging data sent from the camera based on the frame-rate control signal.

Abstract: Included are: an information management system that manages monitoring-target condition information output from condition-monitoring target devices; cameras that are incorporated in respective train cars and take images of the condition-monitoring target devices; a transmission device that is connected to an in-train transmission channel and transmits imaging data from the camera; a camera-control central device that is connected to the information management system and the transmission device, monitors the monitoring-target condition information sent from the information management system, determines whether the condition-monitoring target devices are in a normal condition, and generates a frame-rate control signal for adjusting a frame rate of imaging data; and a camera-control terminal device that is connected to the transmission device and the camera and adjusts the frame rate of imaging data sent from the camera based on the frame-rate control signal.

Abstract: A playback device for replaying a bit stream digitally transmitted which includes detecting means for detecting only intra-picture data in the bit stream that is replayed; extracting means for extracting the detected intra-picture data from the replayed bit stream, according to the result of the detection at the detecting means; replay mode designating means for selecting and designating one of normal replay, slow replay and still replay, as a replay mode; and replay data outputting means for storing the extracted intra-picture data, and outputting the detected intra-picture data as replay picture data, according to a mode signal output by said replay mode designating means.

Abstract: In a digital VTR having a certain recording bit rate, within a range not higher than a remaining data rate after recording the bit stream, first HP data D1 is recorded in first specific regions, and second HP data D2 is recorded in second specific regions in specific tracks. In middle-speed and high-speed fast replay, the magnetic tape is transported continuously at a middle-speed or high-speed higher than the standard speed for normal replay, and the first HP data D1 is used in common, and at a low-speed fast replay of about twice the normal speed, the speed of the magnetic tape is alternated between a speed near the standard speed for normal replay, and a speed near the low-speed fast, and at the speed near the standard speed, the second HP data disposed in the second specific regions in the specific tracks and the first HP data disposed in the first specific regions in the specific tracks are both replayed.

Abstract: A digital VTR for magnetically recording and replaying a bit stream, includes a detector, an extractor, a mode designator, and an output unit. The detector detects intra-picture data in the bit stream being replayed from tracks in a magnetic medium. The extractor extracts the intra-picture data from the bit stream based on output from the detector. The mode designator designates one of a normal replay and a slow replay as a replay mode. The slow replay is replay performed at a speed slower than normal replay. The output unit stores the extracted intra-picture data, and outputs only the extracted intra-picture data as replay picture data when the slow replay mode is designated.

Abstract: In a digital VTR having a certain recording bit rate, within a range not higher than a remaining data rate after recording the bit stream, first HP data D1 is recorded in first specific regions, and second HP data D2 is recorded in second specific regions in specific tracks. In middle-speed and high-speed fast replay, the magnetic tape is transported continuously at a middle-speed or high-speed higher than the standard speed for normal replay, and the first HP data D1 is used in common, and at a low-speed fast replay of about twice the normal speed, the speed of the magnetic tape is alternated between a speed near the standard speed for normal replay, and a speed near the low-speed fast, and at the speed near the standard speed, the second HP data disposed in the second specific regions in the specific tracks and the first HP data disposed in the first specific regions in the specific tracks are both replayed.

Abstract: In a digital VTR having a certain recording bit rate, within a range not higher than a remaining data rate after recording the bit stream, first HP data D1 is recorded in first specific regions, and second HP data D2 is recorded in second specific regions in specific tracks. In middle-speed and high-speed fast replay, the magnetic tape is transported continuously at a middle-speed or high-speed higher than the standard speed for normal replay, and the first HP data D1 is used in common, and at a low-speed fast replay of about twice the normal speed, the speed of the magnetic tape is alternated between a speed near the standard speed for normal replay, and a speed near the low-speed fast, and at the speed near the standard speed, the second HP data disposed in the second specific regions in the specific tracks and the first HP data disposed in the first specific regions in the specific tracks are both replayed.

Abstract: In a digital VTR having a certain recording bit rate, within a range not higher than a remaining data rate after recording the bit stream, first HP data D1 is recorded in first specific regions, and second HP data D2 is recorded in second specific regions in specific tracks. In middle-speed and high-speed fast replay, the magnetic tape is transported continuously at a middle-speed or high-speed higher than the standard speed for normal replay, and the first HP data D1 is used in common, and at a low-speed fast replay of about twice the normal speed, the speed of the magnetic tape is alternated between a speed near the standard speed for normal replay, and a speed near the low-speed fast, and at the speed near the standard speed, the second HP data disposed in the second specific regions in the specific tracks and the first HP data disposed in the first specific regions in the specific tracks are both replayed.

Abstract: A signal which is to be used in high-speed playback is recorded in a predetermined region of a track. An error correcting check code region for recording an error correcting check code is formed at a position adjacent to the predetermined region. In accordance with the usage, an error correcting check code for high-speed playback, an error correcting check code for normal playback, or predetermined fixed data is recorded in the error correcting check code region. In a digital VTR which records and plays back data at plural kinds of data rates, trick playback data are recorded so that a head scans a subcode area or a VAUX area in high-speed playback at a predetermined tape running speed in each record mode. An area for recording an error correcting check code is used as an area for, in addition to an error correcting check code for normal playback, recording an error correcting check code for trick playback, normal playback data, or trick playback data.

Abstract: A signal which is to be used in high-speed playback is recorded in a predetermined region of a track. An error correcting check code region for recording an error correcting check code is formed at a position adjacent to the predetermined region. In accordance with the usage, an error correcting check code for high-speed playback, an error correcting check code for normal playback, or predetermined fixed data is recorded in the error correcting check code region. In a digital VTR which records and plays back data at plural kinds of data rates, a trick playback data are recorded so that a head scans a subcode area or a VAUX area in high-speed playback at a predetermined tape running speed in each record mode. An area for recording an error correcting check code is used as an area for, in addition to an error correcting check code doe normal playback, recording an error correcting check code for trick playback, normal playback data, or trick playback data.

Abstract: A digital VTR for magnetically recording and replaying a bit stream, includes a detector, an extractor, a mode designator, and an output unit. The detector detects intra-picture data in the bit stream being replayed from tracks in a magnetic medium. The extractor extracts the intra-picture data from the bit stream based on output from the detector. The mode designator designates one of a normal replay and a slow replay as a replay mode. The slow replay is replay performed at a speed slower than normal replay. The output unit stores the extracted intra-picture data, and outputs only the extracted intra-picture data as replay picture data when the slow replay mode is designated.

Abstract: A tracking error signal is detected using an error detector, from cross-talk components at a point in each of the regions of several duplication areas from which reproduction is possible, and tracking control is performed using a servo circuit, based on the average value of the error signals or the average of the maximum and minimum of the peak values of the error signals from the respective areas during one scan. Even when a large amount of fast playback data is recorded, and track non-linearity is present, the fast playback can be reproduced without fail, and signals in fast playback data regions at a plurality of locations can be obtained without fail.

Abstract: In a digital signal playback device for playing back data from a recording medium on which intraframe, intrafield, interframe or interfield encoded digital video signals and digital audio signals input in the form of packets have been recorded transparently, and special playback data for special playback generated from said intraframe or intrafield encoded digital video signals has been recorded at predetermined positions, the special playback data is separated from a playback signal during special playback, and stored in a data storage circuit stores the separated special playback data. A still image slice data generator generates slice data with the motion vectors being 0 and prediction errors being 0 for all macroblocks in the slice.

Abstract: A head arrangement and head offset are set so that the track pattern continuously recorded on a continuously running tape will be ordered in the sequence of recording when taken along the time dimension. In intermittent-feed still-speed recording, recording information is divided for recording, and the magnetic tape is fed momentarily by a distance equal to the tape amount recorded. In a helical scan magnetic recording and reproducing apparatus, intermittent still-speed recording is performed at prescribed intervals of time, and playback is performed with conditions that satisfy .vertline.v.vertline..ltoreq.r/N (N: positive integer, v: real number, r: positive real number) when the magnetic tape is played back at a speed v times as fast as normal playback speed and the rotary drum is rotated for playback at a speed r times as fast as recording speed.

Abstract: A magnetic type recording and reproducing apparatus comprises means for extracting by a first head and a second head a plurality of pilot signal components and means for finding an error for control of tracking with using a proper pilot signal component in accordance with a data rate of signals.The magnetic type recording and reproducing apparatus controls a recording tape speed in accordance with the data rate of signals, controls a playback tape speed in accordance with a high playback speed and the data rate, and arranges high speed playback data in areas which are to be traced by both heads during a playback with a plurality of data rates.

Abstract: In a digital signal recording and playback device, the transmission rate of input transport packets is identified. A recording mode, a rate at which data is to be recorded, is set on the basis of the identified transmission rate. Intra-frame or intra-field coded digital video data is extracted from the transport packets, and the extracted intra-frame or intra-field coded digital video data is reconstructed to generate special playback data. A recording format is generated such that the input transport packets and special playback data will be recorded at predefined positions on a track of a recording medium. The number of repetitions of the special playback data to be recorded on the recording medium or the recording format is varied depending on the recording mode. Because of the improvement in the recording rate of the fast playback data, the playback picture quality during fast playback can be improved.

Abstract: According to a first aspect of the invention, digital image data are recorded in the form of compressed codewords with check information and flags. The flags indicate codewords containing uncorrected errors. Each time the data are copied, error detection and correction are performed and the flags are updated to indicate any new uncorrectable errors that are detected. The flags can be used for error concealment, to avoid error miscorrection, and to permit the check information to be regenerated each time the data are copied. According to a second aspect of the invention, when image data are copied, the same check information is used to perform error detection and correction twice. Flags identifying uncorrected errors can be transferred from the first error-detecting-and-correcting process to the second.

Abstract: In recording one frame of video data in a plurality of tracks, high-frequency components of the video data are recorded in first and last ones of the plurality of tracks while low-frequency components thereof are recorded in the other tracks. In an editing/recording operation, a first frame of video data is recorded twice for first two consecutive frame periods after the start of the recording, and a last frame of video data is recorded twice for last two consecutive frame periods before the end of the recording. In a reproducing operation, one frame of video data is not used immediately before and after the start of the editing/recording operation and immediately before and after the end of the editing/recording operation.

Abstract: To reduce the undetected errors without degradation of the burst error correction capability, in error correction decoding of the digital signal with three-dimensional error correction codes appended thereto. For correcting errors by applying error correction codes in three directions of a recording direction, perpendicular direction, and direction of tracks, whether a burst error has occurred is checked, and an error-correction decoding algorithm is switched between one used when a burst error has occurred, and one used when no burst error has occurred.

Abstract: This invention provides monolithic refractories comprising 100% by weight of refractory aggregate powders, and in addition thereto, based on the weight of refractory aggregate powers, 0.05 to 5% by weight of a binder which is phosphate glass and/or hydroxycarboxylates and 0.01 to 1% by weight of a thickener, characterized in that said monolithic refractories have been kneaded with water or other kneading liquid. The monolithic refractories are capable of being applied without being kneaded at working sites.