JPH01273255A - Information recording method for information recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain matching of ATF signals near the starting end of a program area so as to quickly reproduce a program by forming a lead-in area in the area preceding the program area when no recording is made in the starting end section of a tape. CONSTITUTION:When a tape 8 is loaded on the main body of an information recording and reproducing device, 'tape top' is detected and the presence/ absence of a signals in the lead-in area 27 of the tape is discriminated by means of a control circuit 20 by using an RF envelope exist signal from a detection circuit 42 and, when no record is discriminated, the tape 8 is rewound and prescribed signals are recorded in the area 27. Such lead-in area 27 is formed by a prescribed number. Thus the area 27 in which the prescribed signals are recorded is formed at the part preceding a program area 26 in the starting end section of the tape in such way when the tape is not recorded with signals.

Description

DETAILED DESCRIPTION OF THE INVENTION H) Industrial Application Field The present invention relates to information recording and reproducing in which main information such as digital rear door information, tracking control information, and subcode information such as program numbers are recorded on a recording medium such as a magnetic tape. Manufacturing (
1: This relates to an information recording method in which, when the magnetic tape is a non-recording tape, a lead-in area in which predetermined signals are recorded is formed in an area before the program area at the beginning of the magnetic tape. be.

- Conventional technology Conventionally, a rotary head type digital audio tape recorder (hereinafter referred to as R-DA'r) was described, for example, in the May 1987 issue of the magazine "Electronics Life" (published by Japan Broadcasting Publishing Association), pages 11 to 66. As described in (2), a magnetic tape is alternately scanned (=helical scanned by a pair of rotating heads for recording and reproducing with different mutual ζ near azimuth angles of the head cylinders, and the central part of each track of the tape is scanned for one hour. Main information such as digital audio information consisting of compressed POM audio data!Record and write it on both sides ζ2AT
F (Automation Traok Findi
It is configured to time-divisionally record tracking control information called a ng) signal and subcode information. (Refer to Figure 5) 0 Also, in R-DAT, as shown in Figure 2 Tomoe, it is decided that there should be at least 100 spaces from the end of the leader tape at the beginning of the tape to the program area where the actual program is recorded. ing. Then, in the subcode area of the lead-in area υ before the program area, each data that completes C2 (= rOB as a program number that changes)
It is decided to record BJ. This lead-in area circle is recorded continuously with the program area (to) between C2 and the 100th key (:). Furthermore, before the start ID of each program area, a predetermined period of time (for example, 2 seconds) where the main information non-recorded portion such as an audio signal is formed (: subcode area I of each track)
The program number to be recorded is 0, where the number shown in Figure 4-1 is recorded, i.e., rOBBJ in the lead-in area circle.
are recorded, and the program number is invalid in the 1st, 2nd, 3rd, and so on program area (rool J, ro02J, r003J, etc.) in the fD (8-I D) area, and in other areas. "O" to indicate that
AA'' are recorded respectively. Then, roI]lJ is recorded in the lead-out area at the end of the tape.

(c) Problems to be Solved by the Invention Before the program area (; If a lead-in area is not formed, of course no ATF signal is recorded before the program area. 1. Troubleshooting.

King is normal (: until it works (: it takes a long time) until the 9th, 11th, and 11th songs are played (- there is a problem that it takes a long time) Also, when searching, the start ID of the 1st and 1st song (
S-4D) Before the signal (=If there is no ATF signal for tracking control, the search operation (cueing operation) for the first song) takes too much time and there is also the problem that the back is slow. When performing after-recording after changing the signature, if the lead-in area is not formed, there will be a part near the start of the program area where the ATF signal will be inconsistent and after-recording will not be possible.As a result, the previously recorded friend start ID will be erased. There is also a problem of L: being left behind.Also, in the case of C2, when predetermined information is recorded in the program area and a lead-in area is formed afterward, the consistency of the ATF signal is poor near the beginning of the program area. The problem was that the tracking was off and the servo didn't work properly, and it took 62 hours for the first song to play.

B) Means for Solving the Problems The present invention has been made with the above-mentioned points in mind, and when a magnetic tape is loaded into the apparatus main body C2, it is determined whether the tape is a blank tape or not at the beginning of the tape. If it is a non-recording tape, a lead-in area in which a predetermined signal is recorded is formed in the area before the program area.

(e) Examples Embodiments of the present invention will be described below together with the drawings.

FIG. 1 shows an example of a specific system configuration of an R-DAT using the present invention. (l) is an input terminal into which an information signal such as an audio signal is input; (2) is a digital signal that interleaves this information signal, adds an error correction code, and further processes such as time compression; ζ: digital signal to be converted; processing circuit.

Is (3) time information such as song number and absolute time, or the beginning of the song? Start ID signal (8-
A sapu-do generation circuit that generates information signals such as ID).

(4) is a servo signal generation circuit that generates pilot signals and tank signals for tracking control. (5) is a recording amplifier that is a combination of the output of the digital signal processing circuit (2), the output of the subcode generation circuit (3), and the output of the servo signal generation circuit (4).
-XD 9 signals including information signals such as WFITII signal! Signal I for time-division recording on tape from selector switch (to) C2: Converting. (6) is the recording amplifier (
5) A rotary transformer that supplies the output from the recording/reproducing magnetic head (7).

(8) is a signal! Magnetic tape for recording. (9) is a reproducing amplifier, and fin is P from the output from the reproducing amplifier (9).
The digital signal processing circuit o111 generates the LL clock, extracts the data signal, performs processing such as error correction, and demodulates the original analog signal (the sampling frequency and quantization bit processed by the digital signal processing circuit fi1) A subcode processing circuit that extracts subcode signals such as numbers, song numbers, time information, etc. α2 is the output terminal of the demodulated analog signal. fi3cle is the reel motor, and αD is the motor control that controls the reel motor. Circuit On4 is a capstan motor, tI51 is a cylinder motor, 0 is a motor control circuit that controls the capstan motor and cylinder motor n5Wr. On9 is a servo signal for tracking control from the output of the reproduction amplifier (9). Extract the motor control circuit α
ATF servo circuit that sends a tracking error signal to ♂.

■ is the control circuit that controls the entire device, and the reel motor a3
Sumi e, capstan motor (14, cylinder motor α9
The sub code generation circuit (3), servo signal generation circuit (4), recording amplifier (5), sub code generation circuit (3), servo signal generation circuit (4), recording amplifier (5), sub code processing circuit tt
Control n.

The decoy is an RF envelope detection circuit.

The control circuit (7) is composed of nine system controllers using a microcomputer. Further, the subcode processing circuit aυ is constructed using a subcode microcomputer or the like.

Then, when the input terminal (2)) (23 operation key signal, mechanism detection signal (:) is set to the normal recording mode of the tape (8), the control circuit of the control circuit circle:
The standard mode is 1x speed in the forward direction C; when traveling 6:
The cylinder (6) also rotates at standard speed, and at this time the head (
71 (7) tape (8)%: Alternate 1: Helical scan.

At this time, nine signals input from the input terminal (1) are processed by the digital signal processing circuit (2) and sent to the recording amplifier (5) together with the signals from the subcode generation circuit (3) and servo signal processing circuit (4). The data is recorded on a magnetic tape (8) through a σ-tally transformer (6) and a recording/reproducing magnetic head (7). During playback, the signals recorded on the magnetic tape (80) are read by the recording/reproducing magnetic head (7) and sent to the playback amplifier (9) through the rotary transformer (6) where they are amplified.
Further I: The signal is processed by the digital signal processing circuit αe and output as an analog signal from the output terminal fi3.

FIG. 2 is a diagram showing the state of the tape starting end.

A lead-in area (B) is formed between the leader tape (24) and the program area (2), where there is an area (9) where the program is recorded; When loading a cassette, that is, when installing a tape, apply high tension from the reel motor C2, tension the tape, and rotate the rotary head cylinder at a constant speed C.
That is, the RF envelope a from the RF envelope detection circuit Ω2
- Detecting the presence or absence of a recording signal I: Yes, it is possible to determine the presence or absence of a recording signal by using a well-known means such as an optical sensor and detecting the tape top position from the leader tape. It is determined whether or not the tape is a non-recording tape at the beginning of the tape. If the tape is a non-recording tape, a lead-in area in which a predetermined signal is recorded is formed in the area before the program area.

Figure 3 I shows a schematic chart of the operation of the control circuit C2 when the tape is attached.

The operation of this embodiment of the present invention will be described below.

First, when the tape is mounted on the R-DAT main body, the well-known tape position detection means I (not shown) detects the tape top [the leading edge of the recordable area (c)] (step 28).
) If the tape is at the top, run the tape at 2 to 3 times the capstan speed to point B in Figure 2 (step 29). During this time, the RF envelope detection circuit (4) detects the R'F envelope detection signal from the tape lead-in area (27), and determines whether the signal has been recorded by the control circuit (2). Step 30): If recording has been completed, the capstan motor (14) is stopped to stop the tape.

If the lead-in area amount is unrecorded and it is determined that the tape is unrecorded, the tape (
8) Run the capstan (step 31)
Then, a predetermined signal is recorded in the lead-in area @ from point A to point B (step 52). That is, the subcode area ωC2 shown in FIG. 5, which is an enlarged version of the main part of FIG. 2, has a program number "0BBJ", a priority ID "1",
Absolute time information (A time information) and the like are recorded, and the tracking control information signal recording area (b) (: is used to record an ATF signal).

However, nothing is recorded in the time axis compressed signal recording area (c) I:. In this way, a lead-in area (3) in which predetermined signals are recorded is formed for, for example, 35 frames.

If it is not a tape top, the RF envelope detection circuit (
The presence or absence of the RF Enpero program signal from the four (2) determines whether or not the tape (8) has been recorded (Step 56).If there is no recording signal, the tape (8) is read at a constant speed.
Step 3: Rewind the 8) slightly with the capstan travel C;
7), it is detected whether the next position for rewinding is the top of the tape (step 38).

If the tape is at the top, step forward (: Advance and perform the same operation as described above. If it is not at the tape top, move the tape (8) at a constant speed in the forward direction (: Run the capstan and return to the original position to stop the tape. (Step 39).

If it is detected in step (to) that the tape (8) has been recorded, the signal from the subcode processing circuit αυ (
: subcode area 1; recorded program number is r
If it is rOBBJ, the tape (8) is run at a constant speed on the capstan to point B in Figure 2 (Step 41).
orosB", stop that IT tape (81).

After the above-described operations, when recording a program signal in the program area, the tape is rewound a little from each of the above-mentioned positions before the recording operation begins.

In this way, when the magnetic tape is a non-recording tape, an area (: a lead-in area in which a predetermined signal is recorded) is formed before the 10-gram area at the beginning of the tape.

In the above embodiment, a rotary head type digital audio tape recorder ζ2 is used. However, the present invention is not limited to such an embodiment. You may.

(F) Effects of the Invention As described above, the information recording method of the information recording and reproducing apparatus of the present invention is such that when the recording medium is inserted into the apparatus itself, the recording medium is a non-recording medium at the starting end of the recording medium. If it is a non-recording medium, C2 is the area before the program area! - Predetermined signals are recorded to form nine lead-in areas. Therefore, for example, the subcode area of the lead-in area (-) is recorded with the program number rOBBJ indicating that it is a lead-in area, and the tracking control information signal recording area CATF signal is recorded. : When installed, the ATF signals are matched even near the beginning of the program area, and the C Ni-tracking operation begins immediately, allowing the first program (for example, the first song) to be played back immediately. In this case, if the predetermined information is recorded in the program area after forming the lead-in area, the consistency of the ATF signal will be good near the beginning of the program area, and from this point of view, the g7IJ1st program can be started immediately. In addition, since there is an ATF signal for racking control before the start ID signal of the 10th track during the search operation, the search operation (cueing operation) time is short and the back is not exposed. Even when after-recording is performed near the beginning of the program area, the ATF signals are aligned, so there is no risk that after-recording will not be possible at the beginning of the program area.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a schematic diagram of the tape, Fig. 3 is a flowchart for explaining the operation, Fig. 4 is an internal configuration diagram of the tape, and Fig. 5 is a schematic diagram of the tape. FIG. 2 is an enlarged view of the main part of the figure showing the recording track format of R-DAT. (8)...tape, (9)...playback amplifier, ■...
・Control circuit, punishment...lead-in area, fourth...program area. CQ Vortex

Claims (4)

[Claims] (1) An information recording method for an information recording and reproducing apparatus in which main information such as digital audio information, tracking control information, and subcode information such as a program number is recorded and reproduced on a recording medium, the information recording method being When installed in a playback device, it is detected whether or not the recording medium is a non-recording medium at the starting end of the recording medium, and if it is a non-recording medium, a predetermined area in front of the program area of the recording medium is detected. 1. An information recording method for an information recording/reproducing device, comprising forming a lead-in area in which information is recorded. (2) An information recording method for an information recording and reproducing apparatus according to claim 1, wherein the predetermined information includes at least a program number indicating that the area is a lead-in area and tracking control information. . (3) An information recording method for an information recording/reproducing apparatus according to claim 1, wherein the information in the lead-in area is recorded before the information recorded in the program area. (4) An information recording method for an information recording/reproducing apparatus according to claim 1, wherein the recording medium is a magnetic tape.