摘要:
A magnetic recording and reproducing apparatus having a construction in which a digital signal including index signals recorded on a magnetic tape is reproduced and rotary magnetic heads are movable. The digital signal is reproduced by digital signal reproducing means including the rotary magnetic heads. A particular index signal among the index signals is detected by index signal detecting means. Further, the timing for reproducing the particular index signal is detected by timing detecting means. The rotary magnetic heads are moved and deviated in the direction of the rotary shaft of the rotary cylinder by rotary magnetic head position deviating means. Tape speed detecting means compares a reproduction clock with a reference clock and outputs a tape speed signal. First rotary magnetic head position deviation control means forms a control input for the rotary magnetic head position deviating means on the basis of the tape speed signal. Second rotary magnetic head position deviation control means forms the control input for the rotary magnetic head position deviating means on the basis of an output signal of the timing detecting means.
摘要:
The precedingly reproduction signal reproduced by a precedingly reproducing head is recorded on a tape. If it is detected that the reproduction signal includes abnormality owing to a reason such as poor error rate, the recording operation is stopped. Then, for retrial of the recording, the information on the position where the abnormality has occurred is held. A memory may be provided to always rewrite and store the signal reproduced by the precedingly reproducing head, and also a simultaneously reproducing head which is different from the precedingly reproducing head may be provided to immediately monitor the recording state of the signal recorded on the tape. If it is detected that the signal reproduced by the simultaneously reproducing head includes abnormality, the recording operation is stopped, the information on the position where the abnormality has occurred is held. Further, the rewrite operation in the memory is stopped and the original precedingly reproduction signal corresponding to the signal to be recorded at the position where the abnormality has occurred is held in the memory.
摘要:
For the purpose of data compression and expansion in the playback mode reproducing data including video data and audio data recorded on a magnetic tape, a relative speed signal is generated from a circuit on the basis of the moving speed of the magnetic tape and the rotation speed of a head drum, and the characteristic of the recorded data is controlled according to this relative speed signal. The tension of the magnetic tape is detected by a circuit, and the phase difference between the detected tape tension signal and a reel rotation speed command signal is detected by a circuit so as to control the tape tension according to the detected phase difference. When a target value of the drum rotation speed is changed, a drum drive signal is changed stepwise at a predetermined time interval, and the amount of delay of a drum rotation reference signal delayed according to a signal indicative of the rotation speed of a capstan is changed, so as to determine the range in which both the capstan rotation speed and the drum rotation speed can be changed. Interfaces are disposed between a system controller and a pitch controller so as to control the tone pitch of the audio signal according to the capstan rotation speed signal.
摘要:
A magnetic tape drive in a helical scan system can shorten retry operation time. A data signal reproduced from magnetic tape through reproducing heads is supplied to a regenerative signal processing circuit. If an uncorrectable error is contained in the signal, the regenerative signal processing circuit outputs error information to a system controller. Then, the system controller sends a retry instruction to a movable head controller. When receiving the retry instruction, the movable head controller supplies movable head control signals to displacement elements which then displace the reproducing heads along a rotating shaft of a rotary drum for re-scanning an error occurrence data track. This retry operation is repeated until no error is detected. The magnetic tape is run at lower speed or is stopped as required during the repetitive retry operation.
摘要:
A data recording and reproducing apparatus of a helical scanning system includes a unit for recording and reproducing an information signal in an oblique information track on a magnetic tape by a rotary magnetic head and a unit for recording and reproducing a control signal on the magnetic tape in a longitudinal direction thereof. Further, the data recording and reproducing apparatus includes a memory unit for storing a difference (X-value error information) between a predetermined X value and a distance (X value) between a record starting position of the information track and a recorded position of the control signal, a unit for recording X-value error information on the magnetic tape individually each time information is recorded, a unit for reproducing X-value error information on the magnetic tape, and a unit for shifting a reproduced phase of the control signal in accordance with the X-value error information.
摘要:
A digital processing unit for converting a digital picture signal into data by blocks and for correction encoding a variable-length encoded signal. This digital processing unit includes a digital data compressing section for dividing a picture signal into a plurality of number of blocks, and compressingly outputting digital data of this picture signal based on a processing unit of one or a few blocks, a buffer section for sequentially storing the digital data, and an error correction encoding section for sequentially reading the digital data from this buffer section, and structuring an inner code for each inner block structured by this digital data and structuring an outer code for each predetermined unit of inner blocks, to thereby structure two-dimensional error correction code blocks, to output an error correction code signal. Further, the error correction encoding section has the length of the digital data of the picture signal included in the inner code set to be equal to or larger than a mean code length of predetermined compressed blocks.
摘要:
Disclosed is a digital video signal record/play-back apparatus in which when a time code signal is recorded/played-back onto/from a recording medium correspondingly to a video signal, the time code signal is recorded/played-back with a time delay which is given by a delay time corresponding to the time taken for signal processing necessary for the recording/play-back of the video signal.
摘要:
A storage battery module 20 includes plural battery cells 320 in which a wound electrode group 322 having positive and negative electrodes, and positive and negative electrode collector plates 327a and 327b connected to the positive and negative electrodes are accommodated in a battery cell 321, and positive and negative external terminals 331 and 341 are provided to be exposed to outside of the battery case 321, a circuit board 350 including a temperature detecting wiring 302 of the battery cell 320 connected to the positive and negative external terminals 331 and 341, and a temperature sensor 381 for detecting a temperature of the battery cell 320 provided above the wiring 302.
摘要:
A storage battery module 20 includes plural battery cells 320 in which a wound electrode group 322 having positive and negative electrodes, and positive and negative electrode collector plates 327a and 327b connected to the positive and negative electrodes are accommodated in a battery cell 321, and positive and negative external terminals 331 and 341 are provided to be exposed to outside of the battery case 321, a circuit board 350 including a temperature detecting wiring 302 of the battery cell 320 connected to the positive and negative external terminals 331 and 341, and a temperature sensor 381 for detecting a temperature of the battery cell 320 provided above the wiring 302.
摘要:
A battery module of includes a plurality of cells, a cooling plate, and a channel part formed in the cooling plate. The channel part includes a first channel part extending in an arrangement direction of the plurality of cells, a second channel part extending in parallel to the first channel part along the arrangement direction with a first partition part interposed between the first channel part and the second channel part, and a first communication part which brings one end of the first channel part of the arrangement direction and one end of the second channel part of the arrangement direction into communication with each other, and which turns a flowing direction of coolant in the first channel part and the second channel part.