JPH0196845A - Recording system for rotary head type tape recorder - Google Patents

Abstract

PURPOSE:To prevent the influence of the response delay, etc., of a mechanism even when a recording-interrupting-recording is repeated by rewinding a tape for a constant period and stopping the tape after time information in a sub-code signal is stored at the time of the interruption of a recording and starting the recording from the coincident point of the time information. CONSTITUTION:When the recording is interrupted, after the time information in the sub-codre signal extracted at a sub-code processing circuit 13 is detected with a sub-code signal generating circuit 4 and stored in an internal memory 24 in a microcomputer 23, the tape is rewound for a constant time and stopped. When the recording is instructed again by an operating key 26, while a reproducing mode is set, a servo signal already recorded is reproduced, and a tracking control is executed through a motor driving circuit 20, the coincidence of the time information obtained from the sub-code signal and the time information stored in the memory 24 is decided at a deciding circuit 25, and the recording is started at a point where the two pieces of time information coincide.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a recording system for a rotating head type tape reflex.

Conventional technology Conventionally, in a rotary head digital audio tape recorder (R-DAT), an information recording area is formed at the center of the trace of each track of a tape that is helically scanned by a rotary head, and this information is A tracking area and a subcode area are formed on both sides of the recording area, that is, at the trace start end and the trace start end of each track.

During recording, information signals such as audio that have been converted into digital signals are recorded in the information recording area, and servo signals for tracking control are recorded in the tracking area, and servo signals for high-speed search are stored in the subcode area. Along with the start ID, subcode signals such as song number and time information were recorded. Here, the time information includes absolute time and open time, where the absolute time is the time from the beginning of the tape to the current tape position, and the open time is the time from the beginning of the song to the current tape position.

(C) Problems to be Solved by the Invention However, in such an R-DAT, when recording is interrupted (stopped or paused) and then recorded again, there is a delay in response of the mechanism, overrun, backlash, etc.
Due to the influence of disturbances and the like, it has been difficult to form a new track continuously from the last track at the end of the previous recording (so-called continuous recording).

(d) Means for Solving the Problems In order to solve the above-mentioned problems, the present invention forms a tracking area and a subcode area together with an information recording area in each track of a tape that can be helically scanned by a rotating head. At the time of recording, information signals such as audio converted to digital signals are recorded in the information recording area, and servo signals for tracking control are recorded in the tracking area, and subcode signals such as time information are stored in the subhood area. This is a rotary head tape recorder that records .When recording is interrupted, the time information in the subcode signal recorded in the subcode area of the last track is memorized, and then the tape is rewound for a certain period of time, then stopped, and then restarted. When recording, from the time of rewinding, the playback mode is set and the servo signal is played back from the tracking area of the track that has already been recorded, and the subcode signal is played back from the subcode area, and tracking is controlled using the played back servo signal. At the same time, the time information obtained from the reproduced subcode signal is matched with the stored time information, and from the time of the match, the recording mode is set and new recording is performed.

(E) Function In the recording method of the present invention described above, recording-interruption-recording-
Even if repeated recording is performed, accurate continuous recording can be performed without being affected by mechanism response delay, overrun, backlash, disturbance, etc.

(f) Examples An embodiment of the present invention will be described below with reference to the drawings.

That is, FIG. 1 shows a specific system configuration example of the R-DAT used in the present invention, where (1) is an input terminal that can input an analog audio signal, and (2) is an input terminal that can input an analog audio signal, and (2) is an input terminal that can input this audio signal by interleaving or time compression. Convert to digital signal with CPCM etc.
(3) is a servo signal generation circuit that generates a servo signal (i.e., pilot No. 16, sync signal, etc.) for tracking control;
) is a subcode signal generation circuit that generates subcode signals such as track number and time information along with a start ID for high-speed search, and (5) is an information recording area, tracking area, and subcode signal that can be formed on each track of the tape. A switch circuit that is selectively switched at a predetermined timing to record digitally converted audio signals, servo signals, and subcode signals in the code area, (6) is a recording amplifier, and (7) is a A rotary truss of a rotating head cylinder that supplies the output to two recording/reproducing rotating heads (8) 180° apart, (9) is a playback amplifier, and (10) is the output from the playback amplifier (9). A digital signal processing circuit generates a clock from data using a PLL or the like, converts it into a digital signal, and then converts it into an analog signal (PCM demodulation). (11) is an output terminal from which the original analog audio signal is output. (12) is a servo circuit that extracts a servo signal from the output of the reproduction amplifier (9) for tracking control and generates a tracking error signal; (13)
is a subcode processing circuit that extracts a subcode signal from the output of the reproduction amplifier (9) and detects the start ID and reads time information and the like. (14) is a take-up reel motor that directly drives the take-up reel shaft; (15) is a supply reel motor that directly drives the supply reel shaft; (16) is a supply reel motor that directly drives the supply reel shaft;
) is its motor drive circuit, (17) and (18) are the cylinder morph and its motor drive circuit, (19>(20) is the capstan motor and its excitation circuit, and (21) is the various types Operation key manual and subcode processing circuit (
Each motor (14) (15) (1
7) A control circuit for controlling drive/stop, rotation speed, rotation direction, etc. of (i9), and (22) is a tape wrapped around the rotating head cylinder.

Therefore, during recording, the audio signal input to the λ power terminal (1) is first converted into a digital signal by the digital signal processing circuit (2), and then the servo signal (pilot signal or sync signal) is output from the servo signal generation circuit (3). signal, etc.) and the sub-code signal (subcode signal, etc.) generated by the NABU code generation circuit (4).
)-ID, track number, and time information) is sent to the recording amplifier (6>) in a split manner.Then, this recording amplifier (6)
The output of the rotary head cylinder rotary transformer (
7) and is recorded on the tape by the recording/reproducing rotary head (8). At this time, a track pattern as shown in Figure 2 is formed on the tape, with an information recording area (D) in the center of each track, and tracking areas (Ts) (Te) and subcode areas on both sides. Regions (Ss) and (Se) are respectively formed.

Next, during playback, various signals recorded on the tape (22) are read by the recording/playback rotary head (8) and sent from the rotary transformer (7) of the rotary head cylinder to the playback amplifier (9). And this playback amplifier (
The output of 9) is processed by PLL in the digital signal processing circuit (10).
etc., a clock is generated from the data, which is converted into a digital signal, and then converted into an analog signal, which becomes the original audio signal and is output from the output terminal (11). Furthermore, the output of this reproducing amplifier (9) is sent to a servo circuit (12), which extracts a servo signal for tracking control to generate a tracking error signal, which is sent to a motor drive circuit (20). It sends out and controls the capstan motor (19). In addition, the output of the playback amplifier (9) is also sent to the subcode processing circuit (13), where the subcode signal is extracted and the track number, time information, etc. are read and displayed on the display section via the control circuit (21>). The playback, track number and time are displayed.

Next, the operation during splicing will be performed according to the time chart shown in Fig. 3. Specifically, the control circuit (21) for splicing is a microcomputer for signal arithmetic processing as shown in Fig. 4. The computer (24) is an internal computer that obtains and stores time information in the subcode signal recorded in the subcode area of the last track when recording is interrupted from the subcode generation circuit (4). A memory (25) is a determination circuit that determines whether the time information stored in the internal memory (24) matches the time information in the subcode signal extracted by the subcode processing circuit (13) during playback; (26) is an operating key that specifies each operation such as recording, playback, splicing, etc. Therefore, if you first instruct -time stop with the operating key (26) during recording, the microcomputer (23) will control each motor drive. Circuit (16) (18)
(20) and a recording/playback circuit (not shown) are controlled, and recording ends at point a shown in FIG.
After the time information in the subcode signal recorded in the subcode area of the last track is completely stored in the internal memory (24) from the subcode signal generation circuit (4), the tape is rewound for a certain period of time t0 and the It will stop at the point shown in Figure 3. Note that this tape rewinding is performed while the pinch roller is pressed onto the capstan shaft.
This is done by rotating the reel motors (14) and (15) in the opposite direction. After that, when recording is instructed again using the operation key (26), the microcomputer (23) instructs the pinch roller to be pressed onto the capstan shaft, and the capstan motor (19)
Then, the reel motors (14) and (15) complete forward rotation, and at the time of rewinding, the tape is set to playback mode and the tape is driven in the direction of the arrow, subtracting the servo signal from the tracking area of the already recorded track. Each subcode signal is reproduced from the code area. Then, tracking control is performed by supplying a tracking error signal generated based on the reproduced servo signal to the motor drive circuit (20), and during this reproduction period, the recording/playback rotation direction (8) is Tape (2) to match the track pattern.
2) Performs driving control. Furthermore, a determination circuit (25) determines whether the time information obtained from the reproduced subcode signal matches the time information stored in the internal memory (24),
When it is determined that both time information match at the recording end point a of the Aff times, by setting the recording mode from the matching point a, new recording will be performed continuously from the previous recording end point. . That is, before new recording is performed, the mechanism and servo system are driven by setting the playback mode once, and since the recording/playback rotary head is tracked, it is possible to simply set the playback mode at the coincidence point a. Simply by electrically switching the rotary head from playback to record mode, the system immediately puts the rotary head into record mode and performs continuous recording by forming a new track following the last track at the end of the previous recording by stopping at -. I can do it.

(G) Effects of the Invention As described above, according to the recording method of the present invention, the splicing point can be accurately determined using the time information in the subcode signal recorded in the subcode area, and Since the mechanism is driven and tracking control is performed, even if recording-interruption-recording is performed repeatedly, continuous recording can be performed accurately without being affected by mechanism response delay, overrun, backlash, disturbance, etc. I can make you do it.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of the R-DAT system used in the present invention, FIG. 2 is a track pattern diagram thereof, FIG. 3 is a timing chart during continuous recording, and 4th rXi is a diagram showing a specific example. . (13)...Subcode processing circuit, (21)...Control circuit, (24)...Internal memory, (25)...
Judgment circuit.

Claims (1)

[Claims] (1) Each track of the tape helically scanned by a rotating head has an information recording area and a tracking area;
A subcode area is formed, and at the time of recording, information signals such as audio converted to digital signals are recorded in the information recording area, and servo signals for tracking control are recorded in the tracking area, and time information etc. are recorded in the subcode area. A rotary head tape recorder that records a subcode signal, and when recording is interrupted, the tape is rewound for a certain period of time after storing the time information in the subcode signal recorded in the subcode area of the last track. When recording is stopped and recorded again, the playback mode is set once from the point of rewinding, and the servo signal is played back from the tracking area of the track that has already been recorded, and the subcode signal is played back from the subcode area, and the played back servo signal is In addition to performing tracking control, the time information obtained from the reproduced subcode signal and the stored time information are matched, and from the time of the match, the recording mode is set and new recording is performed. A recording method for a rotating head tape recorder featuring: