Abstract:
A data input/output device or the like preferably suitable for an AV server and provided with a HDD array device (13) as an accessible recording medium, wherein, when the controller (11) of an AV server (10) receives an instruction to reproduce data from not less than two non-continuous regions in the HDD array device (13) in a first sequence, the HDD array device (13) rearranges the data in a second sequence so as to minimize an access time and reads the data and decoders (15 to 18) output the read data again rearranged in the first sequence, thereby enabling a data transfer efficiency to be enhanced without causing any inconvenience.
Abstract:
Digital tape recording and reproducing apparatus includes a rotary drum for having a magnetic tape (9) helically wrapped therearound, a mechanism (20) for advancing the magnetic tape (9) relative to the rotary drum, and a recording/reproducing magnetic head (8, 11) mounted on the drum which scans the magnetic tape (9) for recording or reproducing digital signals. The digital signals are recorded in, or reproduced from, successive inclined tracks (T) formed on the tape (9) as the tape (9) is advanced. During recording of the signals, a timing signal (TG) is generated a predetermined interval of time after detection of a reference signal (PG) that represents a phase of rotation of the drum, and then the timing signal (TG) is recorded in at least one of the inclined tracks (T) interspersed with the digital signals recorded in the track. During reproduction of signals from the tape (9), the drum phase reference signal (PG) is detected and the timing signal (TG) is reproduced and detected, and the time interval between detection of the two signals is measured. The mechanism (20) for advancing the tape (9) is controlled on the basis of the measured interval so that the magnetic head properly scans the recorded tracks (T).
Abstract:
A data recording and reproducing apparatus (1) which can easily perform the editing of audio and/or visual data even at the camera site. In the data recording and reproducing apparatus (1), a VTR portion (10) and an MO disc portion (30) are integrally constituted. Audio and/or visual data input from an outside apparatus is recorded on a video tape (110) by the VTR portion, and further reproduced from the video tape and transferred to the MO disc device (32) at a high speed and recorded. The user of the data recording and reproducing apparatus (1) quickly finds the desired video image by actively utilizing the random access property of the MO disc device and sequentially inputs the same to the VTR device, records the same on the video tape (110), and performs the editing of the audio and/or visual data.
Abstract:
A data recording and reproducing apparatus (1) which can easily perform the editing of audio and/or visual data even at the camera site. In the data recording and reproducing apparatus (1), a VTR portion (10) and an MO disc portion (30) are integrally constituted. Audio and/or visual data input from an outside apparatus is recorded on a video tape (110) by the VTR portion, and further reproduced from the video tape and transferred to the MO disc device (32) at a high speed and recorded. The user of the data recording and reproducing apparatus (1) quickly finds the desired video image by actively utilizing the random access property of the MO disc device and sequentially inputs the same to the VTR device, records the same on the video tape (110), and performs the editing of the audio and/or visual data.
Abstract:
To improve the reliability of reproduction by performing signal processing so that substantially (almost) all DC is eliminated when digital data is recorded (8, 9) on a recording medium such as a magneto-optical disk. (10). According to the present invention, data is divided into parts each having a certain constant length so as to prevent the DC component from building up. A resynchronization signal RESYNC is inserted (6) in the break between the parts, the data is preliminarily modulated and encoded (2) subsequent to the RESYNC, the DC component thereof is counted, and the pattern of the RESYNC is changed in the direction so that the phase becomes a minus value when the sum of the DC components DSV (4) (digital sum value) up to before that RESYNC is a plus value and becomes a plus value when the sum is a minus value, that is, the DSV converges to zero, and the changed data is subjected to modulation and encoding (7), thereby to reduce the DC component of the recording data.
Abstract:
A data recording and reproducing apparatus (10) capable of coping with various applications includes a plurality of first input/output sections (11, 12A, 12B, 12C), a data recording and reproducing section (16) for recording data transmitted via a data bus (14) from the first input/output sections on a recording medium (16) while reproducing data recorded on the recording medium to transmit the data to the corresponding first input/output section via the data bus, and a control section (15) for giving a right to use the data bus to each of the input/output sections for a predetermined time in order are connected to one data bus, with the result that each of the input/output sections occupies the data bus only when the use right is given from the control section, to transmit the data to the data recording and reproducing section via the data bus within the predetermined time or to take in the data which is transmitted via the data bus from the data recording and reproducing section.
Abstract:
Digital tape recording and reproducing apparatus includes a rotary drum for having a magnetic tape (9) helically wrapped therearound, a mechanism (20) for advancing the magnetic tape (9) relative to the rotary drum, and a recording/reproducing magnetic head (8, 11) mounted on the drum which scans the magnetic tape (9) for recording or reproducing digital signals. The digital signals are recorded in, or reproduced from, successive inclined tracks (T) formed on the tape (9) as the tape (9) is advanced. During recording of the signals, a timing signal (TG) is generated a predetermined interval of time after detection of a reference signal (PG) that represents a phase of rotation of the drum, and then the timing signal (TG) is recorded in at least one of the inclined tracks (T) interspersed with the digital signals recorded in the track. During reproduction of signals from the tape (9), the drum phase reference signal (PG) is detected and the timing signal (TG) is reproduced and detected, and the time interval between detection of the two signals is measured. The mechanism (20) for advancing the tape (9) is controlled on the basis of the measured interval so that the magnetic head properly scans the recorded tracks (T).
Abstract:
Video data controllers and disk array units are connected with an independent input serial transmission line and an independent output serial transmission line. Data is serially transmitted between the video data controllers and the disk array units. Data of the video data controllers is sent with time slots assigned thereto. Data has a synchronous signal at the beginning thereof. The synchronous signal synchronizes with time slots. The synchronous signal is followed by commands/status and video data.